add c and jai

c/base/base_arena.c

@@ -0,0 +1,53 @@
+#include "base/base_arena.h"
+#include <stdlib.h>
+
+Arena *arena_alloc(U64 cap) {
+    U8 *mem = (U8 *)malloc(sizeof(Arena) + cap);
+    if (!mem) return NULL;
+    Arena *arena = (Arena *)mem;
+    arena->base = mem + sizeof(Arena);
+    arena->pos = 0;
+    arena->cap = cap;
+    return arena;
+}
+
+void arena_release(Arena *arena) {
+    if (arena) free(arena);
+}
+
+void *arena_push(Arena *arena, U64 size) {
+    U64 aligned = AlignPow2(size, 8);
+    if (arena->pos + aligned > arena->cap) {
+        Assert(!"Arena overflow");
+        return NULL;
+    }
+    void *result = arena->base + arena->pos;
+    arena->pos += aligned;
+    MemoryZero(result, aligned);
+    return result;
+}
+
+void *arena_push_no_zero(Arena *arena, U64 size) {
+    U64 aligned = AlignPow2(size, 8);
+    if (arena->pos + aligned > arena->cap) {
+        Assert(!"Arena overflow");
+        return NULL;
+    }
+    void *result = arena->base + arena->pos;
+    arena->pos += aligned;
+    return result;
+}
+
+U64 arena_pos(Arena *arena) {
+    return arena->pos;
+}
+
+void arena_pop_to(Arena *arena, U64 pos) {
+    if (pos < arena->pos) {
+        arena->pos = pos;
+    }
+}
+
+void arena_clear(Arena *arena) {
+    arena->pos = 0;
+}

c/base/base_arena.h

@@ -0,0 +1,44 @@
+#pragma once
+// base_arena.h - Linear arena allocator
+// Simplified from raddebugger's virtual-memory-backed arena to a malloc-based one.
+// Suitable for per-frame scratch allocations and persistent state.
+
+#include "base/base_core.h"
+
+////////////////////////////////
+// Arena type
+
+typedef struct Arena {
+    U8  *base;
+    U64  pos;
+    U64  cap;
+} Arena;
+
+// Temporary scope (save/restore position)
+typedef struct Temp {
+    Arena *arena;
+    U64    pos;
+} Temp;
+
+////////////////////////////////
+// Arena functions
+
+Arena *arena_alloc(U64 cap);
+void   arena_release(Arena *arena);
+void  *arena_push(Arena *arena, U64 size);
+void  *arena_push_no_zero(Arena *arena, U64 size);
+U64    arena_pos(Arena *arena);
+void   arena_pop_to(Arena *arena, U64 pos);
+void   arena_clear(Arena *arena);
+
+////////////////////////////////
+// Temporary scope helpers
+
+static inline Temp temp_begin(Arena *arena) { Temp t = {arena, arena->pos}; return t; }
+static inline void temp_end(Temp temp)      { arena_pop_to(temp.arena, temp.pos); }
+
+////////////////////////////////
+// Push helper macros
+
+#define push_array(arena, T, count)         ((T *)arena_push((arena), sizeof(T) * (count)))
+#define push_array_no_zero(arena, T, count) ((T *)arena_push_no_zero((arena), sizeof(T) * (count)))

c/base/base_core.h

@@ -0,0 +1,181 @@
+#pragma once
+// base_core.h - Fundamental types, macros, and linked list helpers
+// Inspired by raddebugger's base_core.h
+
+#include <stdint.h>
+#include <stdarg.h>
+#include <string.h>
+#include <stdio.h>
+#include <math.h>
+#include <stdbool.h>
+
+////////////////////////////////
+// Codebase keywords
+
+#ifndef __APPLE__
+#define internal      static
+#define global        static
+#endif
+#define local_persist static
+
+#define trvke 1
+
+////////////////////////////////
+// Base types
+
+typedef uint8_t  U8;
+typedef uint16_t U16;
+typedef uint32_t U32;
+typedef uint64_t U64;
+typedef int8_t   S8;
+typedef int16_t  S16;
+typedef int32_t  S32;
+typedef int64_t  S64;
+typedef S32      B32;
+typedef float    F32;
+typedef double   F64;
+
+////////////////////////////////
+// Limits
+
+#define max_U8  0xFF
+#define max_U16 0xFFFF
+#define max_U32 0xFFFFFFFF
+#define max_U64 0xFFFFFFFFFFFFFFFFull
+#define max_S8  0x7F
+#define max_S16 0x7FFF
+#define max_S32 0x7FFFFFFF
+#define max_S64 0x7FFFFFFFFFFFFFFFll
+
+////////////////////////////////
+// Units
+
+#define KB(n) (((U64)(n)) << 10)
+#define MB(n) (((U64)(n)) << 20)
+#define GB(n) (((U64)(n)) << 30)
+
+////////////////////////////////
+// Clamps, Mins, Maxes
+
+#define Min(A, B)      (((A) < (B)) ? (A) : (B))
+#define Max(A, B)      (((A) > (B)) ? (A) : (B))
+#define ClampTop(A, X) Min(A, X)
+#define ClampBot(X, B) Max(X, B)
+#define Clamp(A, X, B) (((X) < (A)) ? (A) : ((X) > (B)) ? (B) : (X))
+
+////////////////////////////////
+// Alignment / Sizing
+
+#define AlignPow2(x, b)     (((x) + (b) - 1) & (~((b) - 1)))
+#define AlignDownPow2(x, b) ((x) & (~((b) - 1)))
+#define ArrayCount(a)        (sizeof(a) / sizeof((a)[0]))
+
+////////////////////////////////
+// Memory macros
+
+#define MemoryCopy(dst, src, size)  memmove((dst), (src), (size))
+#define MemorySet(dst, byte, size)  memset((dst), (byte), (size))
+#define MemoryCompare(a, b, size)   memcmp((a), (b), (size))
+#define MemoryZero(s, z)            memset((s), 0, (z))
+#define MemoryZeroStruct(s)         MemoryZero((s), sizeof(*(s)))
+#define MemoryZeroArray(a)          MemoryZero((a), sizeof(a))
+#define MemoryMatch(a, b, z)        (MemoryCompare((a), (b), (z)) == 0)
+
+////////////////////////////////
+// Pointer / integer casts
+
+#define IntFromPtr(ptr) ((U64)(ptr))
+#define PtrFromInt(i)   (void *)(i)
+#define OffsetOf(T, m)  IntFromPtr(&(((T *)0)->m))
+
+////////////////////////////////
+// Member access
+
+#define CastFromMember(T, m, ptr) (T *)(((U8 *)(ptr)) - OffsetOf(T, m))
+
+////////////////////////////////
+// For-Loop construct macros
+
+#define DeferLoop(begin, end)        for (int _i_ = ((begin), 0); !_i_; _i_ += 1, (end))
+#define DeferLoopChecked(begin, end) for (int _i_ = 2 * !(begin); (_i_ == 2 ? ((end), 0) : !_i_); _i_ += 1, (end))
+
+#define EachIndex(it, count)   (U64 it = 0; it < (count); it += 1)
+#define EachElement(it, array) (U64 it = 0; it < ArrayCount(array); it += 1)
+
+////////////////////////////////
+// Glue / Stringify
+
+#define Stringify_(S) #S
+#define Stringify(S)  Stringify_(S)
+#define Glue_(A, B)   A##B
+#define Glue(A, B)    Glue_(A, B)
+
+#define Swap(T, a, b) do { T t__ = a; a = b; b = t__; } while (0)
+
+////////////////////////////////
+// Assert
+
+#if defined(_MSC_VER)
+# define Trap() __debugbreak()
+#elif defined(__clang__) || defined(__GNUC__)
+# define Trap() __builtin_trap()
+#else
+# define Trap() (*(volatile int *)0 = 0)
+#endif
+
+#define AssertAlways(x) do { if (!(x)) { Trap(); } } while (0)
+
+#ifdef _DEBUG
+# define Assert(x) AssertAlways(x)
+#else
+# define Assert(x) (void)(x)
+#endif
+
+#define InvalidPath    Assert(!"Invalid Path!")
+#define NotImplemented Assert(!"Not Implemented!")
+
+////////////////////////////////
+// Linked list macros
+// Nil-aware doubly-linked-list operations
+
+#define CheckNil(nil, p) ((p) == 0 || (p) == nil)
+#define SetNil(nil, p)   ((p) = nil)
+
+// Doubly-linked-list (with nil support)
+#define DLLInsert_NPZ(nil, f, l, p, n, next, prev) \
+    (CheckNil(nil, f) ? \
+        ((f) = (l) = (n), SetNil(nil, (n)->next), SetNil(nil, (n)->prev)) : \
+    CheckNil(nil, p) ? \
+        ((n)->next = (f), (f)->prev = (n), (f) = (n), SetNil(nil, (n)->prev)) : \
+    ((p) == (l)) ? \
+        ((l)->next = (n), (n)->prev = (l), (l) = (n), SetNil(nil, (n)->next)) : \
+        (((!CheckNil(nil, p) && CheckNil(nil, (p)->next)) ? (0) : ((p)->next->prev = (n))), \
+         ((n)->next = (p)->next), ((p)->next = (n)), ((n)->prev = (p))))
+
+#define DLLPushBack_NPZ(nil, f, l, n, next, prev)  DLLInsert_NPZ(nil, f, l, l, n, next, prev)
+#define DLLPushFront_NPZ(nil, f, l, n, next, prev) DLLInsert_NPZ(nil, l, f, f, n, prev, next)
+
+#define DLLRemove_NPZ(nil, f, l, n, next, prev) \
+    (((n) == (f) ? (f) = (n)->next : (0)), \
+     ((n) == (l) ? (l) = (l)->prev : (0)), \
+     (CheckNil(nil, (n)->prev) ? (0) : ((n)->prev->next = (n)->next)), \
+     (CheckNil(nil, (n)->next) ? (0) : ((n)->next->prev = (n)->prev)))
+
+// Convenience wrappers using 0 as nil
+#define DLLPushBack(f, l, n)  DLLPushBack_NPZ(0, f, l, n, next, prev)
+#define DLLPushFront(f, l, n) DLLPushFront_NPZ(0, f, l, n, next, prev)
+#define DLLRemove(f, l, n)    DLLRemove_NPZ(0, f, l, n, next, prev)
+
+// Singly-linked queue (doubly-headed)
+#define SLLQueuePush_NZ(nil, f, l, n, next) \
+    (CheckNil(nil, f) ? \
+        ((f) = (l) = (n), SetNil(nil, (n)->next)) : \
+        ((l)->next = (n), (l) = (n), SetNil(nil, (n)->next)))
+
+#define SLLQueuePush(f, l, n)      SLLQueuePush_NZ(0, f, l, n, next)
+#define SLLQueuePushFront(f, l, n) (((n)->next = (f)), ((f) = (n)))
+#define SLLQueuePop(f, l)          ((f) == (l) ? ((f) = 0, (l) = 0) : ((f) = (f)->next))
+
+// Singly-linked stack
+#define SLLStackPush(f, n) ((n)->next = (f), (f) = (n))
+#define SLLStackPop(f)     ((f) = (f)->next)

c/base/base_inc.c

@@ -0,0 +1,3 @@
+// base_inc.c - Unity build for the base layer
+#include "base/base_arena.c"
+#include "base/base_strings.c"

c/base/base_inc.h

@@ -0,0 +1,8 @@
+#pragma once
+// base_inc.h - Umbrella include for the base layer
+// Include this one header to get all base types.
+
+#include "base/base_core.h"
+#include "base/base_arena.h"
+#include "base/base_math.h"
+#include "base/base_strings.h"

c/base/base_math.h

@@ -0,0 +1,110 @@
+#pragma once
+// base_math.h - Vector, range, and color types
+// Inspired by raddebugger's base_math.h
+
+#include "base/base_core.h"
+
+////////////////////////////////
+// Axis enum
+
+typedef enum Axis2 {
+    Axis2_X = 0,
+    Axis2_Y = 1,
+    Axis2_COUNT,
+} Axis2;
+
+typedef enum Side {
+    Side_Min = 0,
+    Side_Max = 1,
+    Side_COUNT,
+} Side;
+
+typedef enum Corner {
+    Corner_00 = 0, // top-left
+    Corner_01 = 1, // top-right
+    Corner_10 = 2, // bottom-left
+    Corner_11 = 3, // bottom-right
+    Corner_COUNT,
+} Corner;
+
+////////////////////////////////
+// Vector types
+
+typedef struct Vec2F32 { F32 x, y; } Vec2F32;
+typedef struct Vec2S32 { S32 x, y; } Vec2S32;
+typedef struct Vec3F32 { F32 x, y, z; } Vec3F32;
+typedef struct Vec4F32 { F32 x, y, z, w; } Vec4F32;
+
+////////////////////////////////
+// Range types
+
+typedef struct Rng1F32 { F32 min, max; } Rng1F32;
+typedef struct Rng1S64 { S64 min, max; } Rng1S64;
+typedef struct Rng2F32 { Vec2F32 p0, p1; } Rng2F32;
+
+////////////////////////////////
+// Constructors
+
+static inline Vec2F32 v2f32(F32 x, F32 y)                     { Vec2F32 r = {x, y}; return r; }
+static inline Vec2S32 v2s32(S32 x, S32 y)                     { Vec2S32 r = {x, y}; return r; }
+static inline Vec3F32 v3f32(F32 x, F32 y, F32 z)              { Vec3F32 r = {x, y, z}; return r; }
+static inline Vec4F32 v4f32(F32 x, F32 y, F32 z, F32 w)       { Vec4F32 r = {x, y, z, w}; return r; }
+static inline Rng1F32 rng1f32(F32 min, F32 max)                { Rng1F32 r = {min, max}; return r; }
+static inline Rng1S64 rng1s64(S64 min, S64 max)                { Rng1S64 r = {min, max}; return r; }
+static inline Rng2F32 rng2f32(Vec2F32 p0, Vec2F32 p1)          { Rng2F32 r = {p0, p1}; return r; }
+static inline Rng2F32 rng2f32p(F32 x0, F32 y0, F32 x1, F32 y1) { Rng2F32 r = {{x0, y0}, {x1, y1}}; return r; }
+
+////////////////////////////////
+// Vec2F32 operations
+
+static inline Vec2F32 add_2f32(Vec2F32 a, Vec2F32 b) { return v2f32(a.x + b.x, a.y + b.y); }
+static inline Vec2F32 sub_2f32(Vec2F32 a, Vec2F32 b) { return v2f32(a.x - b.x, a.y - b.y); }
+static inline Vec2F32 mul_2f32(Vec2F32 a, Vec2F32 b) { return v2f32(a.x * b.x, a.y * b.y); }
+static inline Vec2F32 scale_2f32(Vec2F32 v, F32 s)   { return v2f32(v.x * s, v.y * s); }
+
+// Axis-indexed access
+static inline F32 v2f32_axis(Vec2F32 v, Axis2 a) { return a == Axis2_X ? v.x : v.y; }
+static inline void v2f32_set_axis(Vec2F32 *v, Axis2 a, F32 val) {
+    if (a == Axis2_X) v->x = val; else v->y = val;
+}
+
+////////////////////////////////
+// Vec4F32 operations
+
+static inline Vec4F32 add_4f32(Vec4F32 a, Vec4F32 b)   { return v4f32(a.x+b.x, a.y+b.y, a.z+b.z, a.w+b.w); }
+static inline Vec4F32 scale_4f32(Vec4F32 v, F32 s)     { return v4f32(v.x*s, v.y*s, v.z*s, v.w*s); }
+static inline Vec4F32 lerp_4f32(Vec4F32 a, Vec4F32 b, F32 t) {
+    return v4f32(a.x + (b.x - a.x)*t, a.y + (b.y - a.y)*t, a.z + (b.z - a.z)*t, a.w + (b.w - a.w)*t);
+}
+
+////////////////////////////////
+// Rng2F32 operations
+
+static inline F32     rng2f32_width(Rng2F32 r)     { return r.p1.x - r.p0.x; }
+static inline F32     rng2f32_height(Rng2F32 r)     { return r.p1.y - r.p0.y; }
+static inline Vec2F32 rng2f32_dim(Rng2F32 r)        { return v2f32(r.p1.x - r.p0.x, r.p1.y - r.p0.y); }
+static inline Vec2F32 rng2f32_center(Rng2F32 r)     { return v2f32((r.p0.x + r.p1.x)*0.5f, (r.p0.y + r.p1.y)*0.5f); }
+static inline B32     rng2f32_contains(Rng2F32 r, Vec2F32 p) {
+    return p.x >= r.p0.x && p.x <= r.p1.x && p.y >= r.p0.y && p.y <= r.p1.y;
+}
+static inline Rng2F32 rng2f32_pad(Rng2F32 r, F32 p) {
+    return rng2f32p(r.p0.x - p, r.p0.y - p, r.p1.x + p, r.p1.y + p);
+}
+static inline Rng2F32 rng2f32_shift(Rng2F32 r, Vec2F32 v) {
+    return rng2f32p(r.p0.x + v.x, r.p0.y + v.y, r.p1.x + v.x, r.p1.y + v.y);
+}
+static inline Rng2F32 rng2f32_intersect(Rng2F32 a, Rng2F32 b) {
+    return rng2f32p(Max(a.p0.x, b.p0.x), Max(a.p0.y, b.p0.y),
+            Min(a.p1.x, b.p1.x), Min(a.p1.y, b.p1.y));
+}
+
+// Axis-indexed range dimension
+static inline F32 rng2f32_dim_axis(Rng2F32 r, Axis2 a) {
+    return a == Axis2_X ? (r.p1.x - r.p0.x) : (r.p1.y - r.p0.y);
+}
+
+////////////////////////////////
+// F32 helpers
+
+static inline F32 lerp_1f32(F32 a, F32 b, F32 t) { return a + (b - a) * t; }
+static inline F32 abs_f32(F32 x)                  { return x < 0 ? -x : x; }

c/base/base_strings.c

@@ -0,0 +1,34 @@
+#include "base/base_strings.h"
+#include "base/base_arena.h"
+
+Str8 str8_pushf(Arena *arena, const char *fmt, ...) {
+    va_list args, args2;
+    va_start(args, fmt);
+    va_copy(args2, args);
+    S32 len = vsnprintf(NULL, 0, fmt, args);
+    va_end(args);
+
+    char *buf = push_array(arena, char, len + 1);
+    vsnprintf(buf, len + 1, fmt, args2);
+    va_end(args2);
+
+    Str8 r = {buf, (U64)len};
+    return r;
+}
+
+Str8 str8_push_copy(Arena *arena, Str8 s) {
+    if (s.size == 0 || !s.str) { Str8 r = {NULL, 0}; return r; }
+    char *buf = push_array_no_zero(arena, char, s.size + 1);
+    MemoryCopy(buf, s.str, s.size);
+    buf[s.size] = 0;
+    Str8 r = {buf, s.size};
+    return r;
+}
+
+void str8_list_push(Arena *arena, Str8List *list, Str8 s) {
+    Str8Node *node = push_array(arena, Str8Node, 1);
+    node->string = s;
+    SLLQueuePush(list->first, list->last, node);
+    list->count++;
+    list->total_size += s.size;
+}

c/base/base_strings.h

@@ -0,0 +1,49 @@
+#pragma once
+// base_strings.h - Simple length-delimited string type
+// Inspired by raddebugger's String8
+
+#include "base/base_core.h"
+
+////////////////////////////////
+// String types
+
+typedef struct Str8 {
+    const char *str;
+    U64         size;
+} Str8;
+
+typedef struct Str8Node {
+    struct Str8Node *next;
+    Str8             string;
+} Str8Node;
+
+typedef struct Str8List {
+    Str8Node *first;
+    Str8Node *last;
+    U64       count;
+    U64       total_size;
+} Str8List;
+
+////////////////////////////////
+// Forward declaration for Arena
+typedef struct Arena Arena;
+
+////////////////////////////////
+// Constructors
+
+static inline Str8 str8(const char *s, U64 len)  { Str8 r = {s, len}; return r; }
+static inline Str8 str8_cstr(const char *s)       { Str8 r = {s, s ? (U64)strlen(s) : 0}; return r; }
+static inline Str8 str8_lit(const char *s)         { Str8 r = {s, s ? (U64)strlen(s) : 0}; return r; }
+static inline B32  str8_match(Str8 a, Str8 b) {
+    if (a.size != b.size) return 0;
+    return MemoryCompare(a.str, b.str, a.size) == 0;
+}
+static inline B32 str8_is_empty(Str8 s) { return s.size == 0 || s.str == NULL; }
+
+////////////////////////////////
+// String operations (require arena)
+
+Str8 str8_pushf(Arena *arena, const char *fmt, ...);
+Str8 str8_push_copy(Arena *arena, Str8 s);
+
+void str8_list_push(Arena *arena, Str8List *list, Str8 s);

c/build.h

@@ -0,0 +1,707 @@
+// build.h — Minimal C build system (stb-style single header)
+//
+// Define BUILD_IMPLEMENTATION in exactly one file before including this header.
+//
+// Bootstrap (one-time):
+//   Windows: cl /nologo build.c
+//   macOS:   cc build.c -o build
+// After that, just run ./build (or build.exe) — it rebuilds itself.
+
+#ifndef BUILD_H
+#define BUILD_H
+
+#ifdef _MSC_VER
+#   define _CRT_SECURE_NO_WARNINGS
+#endif
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <errno.h>
+
+#ifdef _WIN32
+#   define WIN32_LEAN_AND_MEAN
+#   include <windows.h>
+#   include <direct.h>
+#   include <io.h>
+#else
+#   include <sys/stat.h>
+#   include <sys/wait.h>
+#   include <unistd.h>
+#endif
+
+////////////////////////////////
+// Macros
+
+#define ARRAY_LEN(a) (sizeof(a) / sizeof((a)[0]))
+
+// Self-rebuild: call at the top of main(). Recompiles the build script
+// if the source file is newer than the running binary, then re-executes.
+#define GO_REBUILD_URSELF(argc, argv) \
+    go_rebuild_urself((argc), (argv), __FILE__)
+
+////////////////////////////////
+// Logging
+
+typedef enum {
+    LOG_INFO,
+    LOG_WARNING,
+    LOG_ERROR,
+} Log_Level;
+
+void build_log(Log_Level level, const char *fmt, ...);
+
+////////////////////////////////
+// Temp allocator — ring buffer for short-lived sprintf results
+
+#ifndef TEMP_CAPACITY
+#define TEMP_CAPACITY (8 * 1024 * 1024)
+#endif
+
+char *temp_sprintf(const char *fmt, ...);
+void  temp_reset(void);
+
+////////////////////////////////
+// String builder — growable byte buffer
+
+typedef struct {
+    char  *items;
+    size_t count;
+    size_t capacity;
+} String_Builder;
+
+bool sb_read_file(String_Builder *sb, const char *path);
+void sb_free(String_Builder *sb);
+
+////////////////////////////////
+// File I/O
+
+bool write_entire_file(const char *path, const void *data, size_t size);
+bool delete_file(const char *path);
+bool rename_file(const char *old_path, const char *new_path);
+bool mkdir_if_not_exists(const char *path);
+
+////////////////////////////////
+// Rebuild checking — returns 1 if rebuild needed, 0 if up to date, -1 on error
+
+int needs_rebuild(const char *output, const char **inputs, size_t count);
+int needs_rebuild1(const char *output, const char *input);
+
+////////////////////////////////
+// Command builder and runner
+
+typedef struct {
+    const char **items;
+    size_t       count;
+    size_t       capacity;
+} Cmd;
+
+// Appends arguments to a command. Use via the macro which auto-counts args.
+void cmd__append(Cmd *cmd, size_t n, ...);
+void cmd__append_arr(Cmd *cmd, const char **args, size_t n);
+#define cmd_append(cmd, ...) do { \
+        const char *_cmd_args[] = {__VA_ARGS__}; \
+        cmd__append_arr((cmd), _cmd_args, sizeof(_cmd_args) / sizeof(_cmd_args[0])); \
+    } while(0)
+
+// Runs the command synchronously, resets cmd->count to 0, returns success.
+bool cmd_run(Cmd *cmd);
+
+// Frees the command's allocated memory.
+void cmd_free(Cmd *cmd);
+
+////////////////////////////////
+// Self-rebuild
+
+void go_rebuild_urself(int argc, char **argv, const char *source);
+
+////////////////////////////////
+// File embedding — convert a binary file to a C header with an array + size.
+
+bool embed_file(const char *input_path, const char *output_path, const char *var_name);
+
+////////////////////////////////
+// SPIR-V shader compilation — compile .glsl to .spv via glslc, then embed as C header.
+
+bool compile_shader(const char *glslc_path, const char *src, const char *spv_path, const char *stage);
+bool embed_spirv(const char *spv_path, const char *header_path, const char *array_name);
+
+#endif // BUILD_H
+
+////////////////////////////////
+// Implementation
+////////////////////////////////
+
+#ifdef BUILD_IMPLEMENTATION
+
+////////////////////////////////
+// Temp allocator
+
+static size_t g_temp_size = 0;
+static char   g_temp[TEMP_CAPACITY];
+
+void temp_reset(void) {
+    g_temp_size = 0;
+}
+
+static char *temp_alloc(size_t size) {
+    if (g_temp_size + size > TEMP_CAPACITY) {
+        g_temp_size = 0; // wrap around
+    }
+    char *result = g_temp + g_temp_size;
+    g_temp_size += size;
+    return result;
+}
+
+char *temp_sprintf(const char *fmt, ...) {
+    va_list args;
+    va_start(args, fmt);
+    va_list args2;
+    va_copy(args2, args);
+    int n = vsnprintf(NULL, 0, fmt, args);
+    va_end(args);
+
+    char *result = temp_alloc(n + 1);
+    vsnprintf(result, n + 1, fmt, args2);
+    va_end(args2);
+    return result;
+}
+
+////////////////////////////////
+// Logging
+
+void build_log(Log_Level level, const char *fmt, ...) {
+    switch (level) {
+        case LOG_INFO:    fprintf(stderr, "[INFO] ");    break;
+        case LOG_WARNING: fprintf(stderr, "[WARNING] "); break;
+        case LOG_ERROR:   fprintf(stderr, "[ERROR] ");   break;
+    }
+    va_list args;
+    va_start(args, fmt);
+    vfprintf(stderr, fmt, args);
+    va_end(args);
+    fprintf(stderr, "\n");
+}
+
+////////////////////////////////
+// String builder
+
+static void sb_ensure(String_Builder *sb, size_t needed) {
+    if (sb->count + needed <= sb->capacity) return;
+    size_t new_cap = sb->capacity ? sb->capacity * 2 : 256;
+    while (new_cap < sb->count + needed) new_cap *= 2;
+    sb->items = (char *)realloc(sb->items, new_cap);
+    sb->capacity = new_cap;
+}
+
+bool sb_read_file(String_Builder *sb, const char *path) {
+    FILE *f = fopen(path, "rb");
+    if (!f) {
+        build_log(LOG_ERROR, "Could not open %s: %s", path, strerror(errno));
+        return false;
+    }
+
+    fseek(f, 0, SEEK_END);
+#ifdef _WIN32
+    long long m = _telli64(_fileno(f));
+#else
+    long long m = ftell(f);
+#endif
+    if (m < 0) {
+        build_log(LOG_ERROR, "Could not get size of %s: %s", path, strerror(errno));
+        fclose(f);
+        return false;
+    }
+    fseek(f, 0, SEEK_SET);
+
+    sb_ensure(sb, (size_t)m);
+    fread(sb->items + sb->count, (size_t)m, 1, f);
+    if (ferror(f)) {
+        build_log(LOG_ERROR, "Could not read %s: %s", path, strerror(errno));
+        fclose(f);
+        return false;
+    }
+    sb->count += (size_t)m;
+
+    fclose(f);
+    return true;
+}
+
+void sb_free(String_Builder *sb) {
+    free(sb->items);
+    sb->items = NULL;
+    sb->count = 0;
+    sb->capacity = 0;
+}
+
+////////////////////////////////
+// File I/O
+
+bool write_entire_file(const char *path, const void *data, size_t size) {
+    FILE *f = fopen(path, "wb");
+    if (!f) {
+        build_log(LOG_ERROR, "Could not open %s for writing: %s", path, strerror(errno));
+        return false;
+    }
+    const char *buf = (const char *)data;
+    while (size > 0) {
+        size_t n = fwrite(buf, 1, size, f);
+        if (ferror(f)) {
+            build_log(LOG_ERROR, "Could not write to %s: %s", path, strerror(errno));
+            fclose(f);
+            return false;
+        }
+        size -= n;
+        buf += n;
+    }
+    fclose(f);
+    return true;
+}
+
+bool delete_file(const char *path) {
+    build_log(LOG_INFO, "Deleting %s", path);
+#ifdef _WIN32
+    DWORD attr = GetFileAttributesA(path);
+    if (attr == INVALID_FILE_ATTRIBUTES) return true; // doesn't exist
+    if (attr & FILE_ATTRIBUTE_DIRECTORY) {
+        if (!RemoveDirectoryA(path)) {
+            build_log(LOG_ERROR, "Could not delete directory %s", path);
+            return false;
+        }
+    } else {
+        if (!DeleteFileA(path)) {
+            build_log(LOG_ERROR, "Could not delete file %s", path);
+            return false;
+        }
+    }
+#else
+    if (remove(path) < 0 && errno != ENOENT) {
+        build_log(LOG_ERROR, "Could not delete %s: %s", path, strerror(errno));
+        return false;
+    }
+#endif
+    return true;
+}
+
+bool rename_file(const char *old_path, const char *new_path) {
+    build_log(LOG_INFO, "Renaming %s -> %s", old_path, new_path);
+#ifdef _WIN32
+    if (!MoveFileEx(old_path, new_path, MOVEFILE_REPLACE_EXISTING)) {
+        build_log(LOG_ERROR, "Could not rename %s to %s", old_path, new_path);
+        return false;
+    }
+#else
+    if (rename(old_path, new_path) < 0) {
+        build_log(LOG_ERROR, "Could not rename %s to %s: %s", old_path, new_path, strerror(errno));
+        return false;
+    }
+#endif
+    return true;
+}
+
+bool mkdir_if_not_exists(const char *path) {
+#ifdef _WIN32
+    int result = _mkdir(path);
+#else
+    int result = mkdir(path, 0755);
+#endif
+    if (result < 0) {
+        if (errno == EEXIST) return true;
+        build_log(LOG_ERROR, "Could not create directory %s: %s", path, strerror(errno));
+        return false;
+    }
+    build_log(LOG_INFO, "Created directory %s", path);
+    return true;
+}
+
+////////////////////////////////
+// Rebuild checking
+
+int needs_rebuild(const char *output, const char **inputs, size_t count) {
+#ifdef _WIN32
+    HANDLE out_h = CreateFile(output, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_READONLY, NULL);
+    if (out_h == INVALID_HANDLE_VALUE) {
+        if (GetLastError() == ERROR_FILE_NOT_FOUND) return 1;
+        build_log(LOG_ERROR, "Could not open %s", output);
+        return -1;
+    }
+    FILETIME out_time;
+    if (!GetFileTime(out_h, NULL, NULL, &out_time)) {
+        CloseHandle(out_h);
+        build_log(LOG_ERROR, "Could not get time of %s", output);
+        return -1;
+    }
+    CloseHandle(out_h);
+
+    for (size_t i = 0; i < count; i++) {
+        HANDLE in_h = CreateFile(inputs[i], GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_READONLY, NULL);
+        if (in_h == INVALID_HANDLE_VALUE) {
+            build_log(LOG_ERROR, "Could not open %s", inputs[i]);
+            return -1;
+        }
+        FILETIME in_time;
+        if (!GetFileTime(in_h, NULL, NULL, &in_time)) {
+            CloseHandle(in_h);
+            build_log(LOG_ERROR, "Could not get time of %s", inputs[i]);
+            return -1;
+        }
+        CloseHandle(in_h);
+        if (CompareFileTime(&in_time, &out_time) == 1) return 1;
+    }
+    return 0;
+#else
+    struct stat sb;
+    memset(&sb, 0, sizeof(sb));
+    if (stat(output, &sb) < 0) {
+        if (errno == ENOENT) return 1;
+        build_log(LOG_ERROR, "Could not stat %s: %s", output, strerror(errno));
+        return -1;
+    }
+    time_t out_time = sb.st_mtime;
+
+    for (size_t i = 0; i < count; i++) {
+        if (stat(inputs[i], &sb) < 0) {
+            build_log(LOG_ERROR, "Could not stat %s: %s", inputs[i], strerror(errno));
+            return -1;
+        }
+        if (sb.st_mtime > out_time) return 1;
+    }
+    return 0;
+#endif
+}
+
+int needs_rebuild1(const char *output, const char *input) {
+    return needs_rebuild(output, &input, 1);
+}
+
+////////////////////////////////
+// Command builder and runner
+
+static void cmd__grow(Cmd *cmd) {
+    size_t new_cap = cmd->capacity ? cmd->capacity * 2 : 32;
+    cmd->items = (const char **)realloc(cmd->items, new_cap * sizeof(const char *));
+    cmd->capacity = new_cap;
+}
+
+void cmd__append(Cmd *cmd, size_t n, ...) {
+    va_list args;
+    va_start(args, n);
+    for (size_t i = 0; i < n; i++) {
+        const char *arg = va_arg(args, const char *);
+        if (cmd->count >= cmd->capacity) cmd__grow(cmd);
+        cmd->items[cmd->count++] = arg;
+    }
+    va_end(args);
+}
+
+void cmd__append_arr(Cmd *cmd, const char **args, size_t n) {
+    for (size_t i = 0; i < n; i++) {
+        if (cmd->count >= cmd->capacity) cmd__grow(cmd);
+        cmd->items[cmd->count++] = args[i];
+    }
+}
+
+static void cmd_render(Cmd *cmd, char *buf, size_t buf_size) {
+    size_t pos = 0;
+    for (size_t i = 0; i < cmd->count && pos < buf_size - 1; i++) {
+        if (i > 0 && pos < buf_size - 1) buf[pos++] = ' ';
+        const char *arg = cmd->items[i];
+        size_t len = strlen(arg);
+        if (pos + len < buf_size - 1) {
+            memcpy(buf + pos, arg, len);
+            pos += len;
+        }
+    }
+    buf[pos] = '\0';
+}
+
+#ifdef _WIN32
+// Properly quote a command line for CreateProcess on Windows.
+static void cmd_quote_win32(Cmd *cmd, String_Builder *quoted) {
+    for (size_t i = 0; i < cmd->count; i++) {
+        const char *arg = cmd->items[i];
+        size_t len = strlen(arg);
+        if (i > 0) {
+            sb_ensure(quoted, 1);
+            quoted->items[quoted->count++] = ' ';
+        }
+        if (len != 0 && strpbrk(arg, " \t\n\v\"") == NULL) {
+            sb_ensure(quoted, len);
+            memcpy(quoted->items + quoted->count, arg, len);
+            quoted->count += len;
+        } else {
+            sb_ensure(quoted, len * 2 + 3);
+            quoted->items[quoted->count++] = '"';
+            size_t backslashes = 0;
+            for (size_t j = 0; j < len; j++) {
+                char c = arg[j];
+                if (c == '\\') {
+                    backslashes++;
+                } else {
+                    if (c == '"') {
+                        for (size_t k = 0; k < backslashes + 1; k++)
+                            quoted->items[quoted->count++] = '\\';
+                    }
+                    backslashes = 0;
+                }
+                quoted->items[quoted->count++] = c;
+            }
+            for (size_t k = 0; k < backslashes; k++)
+                quoted->items[quoted->count++] = '\\';
+            quoted->items[quoted->count++] = '"';
+        }
+    }
+    sb_ensure(quoted, 1);
+    quoted->items[quoted->count] = '\0';
+}
+#endif
+
+bool cmd_run(Cmd *cmd) {
+    if (cmd->count == 0) {
+        build_log(LOG_ERROR, "Cannot run empty command");
+        return false;
+    }
+
+    // Log the command
+    {
+        char render_buf[4096];
+        cmd_render(cmd, render_buf, sizeof(render_buf));
+        build_log(LOG_INFO, "CMD: %s", render_buf);
+    }
+
+#ifdef _WIN32
+    STARTUPINFO si;
+    memset(&si, 0, sizeof(si));
+    si.cb = sizeof(si);
+    si.hStdError = GetStdHandle(STD_ERROR_HANDLE);
+    si.hStdOutput = GetStdHandle(STD_OUTPUT_HANDLE);
+    si.hStdInput = GetStdHandle(STD_INPUT_HANDLE);
+    si.dwFlags |= STARTF_USESTDHANDLES;
+
+    PROCESS_INFORMATION pi;
+    memset(&pi, 0, sizeof(pi));
+
+    String_Builder quoted = {0};
+    cmd_quote_win32(cmd, &quoted);
+
+    BOOL ok = CreateProcessA(NULL, quoted.items, NULL, NULL, TRUE, 0, NULL, NULL, &si, &pi);
+    sb_free(&quoted);
+
+    cmd->count = 0;
+
+    if (!ok) {
+        build_log(LOG_ERROR, "Could not create process for %s", cmd->items[0]);
+        return false;
+    }
+
+    CloseHandle(pi.hThread);
+    WaitForSingleObject(pi.hProcess, INFINITE);
+
+    DWORD exit_code;
+    if (!GetExitCodeProcess(pi.hProcess, &exit_code)) {
+        build_log(LOG_ERROR, "Could not get exit code");
+        CloseHandle(pi.hProcess);
+        return false;
+    }
+    CloseHandle(pi.hProcess);
+
+    if (exit_code != 0) {
+        build_log(LOG_ERROR, "Command exited with code %lu", exit_code);
+        return false;
+    }
+    return true;
+#else
+    pid_t pid = fork();
+    if (pid < 0) {
+        build_log(LOG_ERROR, "Could not fork: %s", strerror(errno));
+        cmd->count = 0;
+        return false;
+    }
+
+    if (pid == 0) {
+        // Child: build null-terminated argv
+        const char **argv_null = (const char **)malloc((cmd->count + 1) * sizeof(const char *));
+        memcpy(argv_null, cmd->items, cmd->count * sizeof(const char *));
+        argv_null[cmd->count] = NULL;
+        execvp(argv_null[0], (char *const *)argv_null);
+        build_log(LOG_ERROR, "Could not exec %s: %s", argv_null[0], strerror(errno));
+        exit(1);
+    }
+
+    cmd->count = 0;
+
+    int wstatus;
+    for (;;) {
+        if (waitpid(pid, &wstatus, 0) < 0) {
+            build_log(LOG_ERROR, "Could not wait on pid %d: %s", pid, strerror(errno));
+            return false;
+        }
+        if (WIFEXITED(wstatus)) {
+            int code = WEXITSTATUS(wstatus);
+            if (code != 0) {
+                build_log(LOG_ERROR, "Command exited with code %d", code);
+                return false;
+            }
+            return true;
+        }
+        if (WIFSIGNALED(wstatus)) {
+            build_log(LOG_ERROR, "Command killed by signal %d", WTERMSIG(wstatus));
+            return false;
+        }
+    }
+#endif
+}
+
+void cmd_free(Cmd *cmd) {
+    free(cmd->items);
+    cmd->items = NULL;
+    cmd->count = 0;
+    cmd->capacity = 0;
+}
+
+////////////////////////////////
+// Self-rebuild
+
+#ifdef _WIN32
+#   define REBUILD_CMD(binary, source) "cl.exe", "/nologo", temp_sprintf("/Fe:%s", binary), source
+#else
+#   define REBUILD_CMD(binary, source) "cc", "-o", binary, source
+#endif
+
+void go_rebuild_urself(int argc, char **argv, const char *source) {
+    const char *binary = argv[0];
+
+#ifdef _WIN32
+    // Ensure .exe extension for Windows
+    size_t len = strlen(binary);
+    if (len < 4 || strcmp(binary + len - 4, ".exe") != 0) {
+        binary = temp_sprintf("%s.exe", binary);
+    }
+#endif
+
+    int rebuild = needs_rebuild1(binary, source);
+    if (rebuild < 0) exit(1);
+    if (rebuild == 0) return;
+
+    const char *old_binary = temp_sprintf("%s.old", binary);
+    if (!rename_file(binary, old_binary)) exit(1);
+
+    Cmd cmd = {0};
+    cmd_append(&cmd, REBUILD_CMD(binary, source));
+    if (!cmd_run(&cmd)) {
+        rename_file(old_binary, binary);
+        exit(1);
+    }
+
+    // Re-execute with the new binary
+    cmd_append(&cmd, binary);
+    {
+        int i;
+        for (i = 1; i < argc; i++) {
+            cmd__append(&cmd, 1, argv[i]);
+        }
+    }
+    if (!cmd_run(&cmd)) exit(1);
+    exit(0);
+}
+
+////////////////////////////////
+// File embedding
+
+bool embed_file(const char *input_path, const char *output_path, const char *var_name) {
+    int rebuild = needs_rebuild1(output_path, input_path);
+    if (rebuild == 0) {
+        build_log(LOG_INFO, "Up to date: %s", output_path);
+        return true;
+    }
+    if (rebuild < 0) return false;
+
+    build_log(LOG_INFO, "Embedding %s -> %s", input_path, output_path);
+
+    String_Builder src = {0};
+    if (!sb_read_file(&src, input_path)) return false;
+
+    String_Builder out = {0};
+    const char *header = temp_sprintf(
+        "// Auto-generated from %s — do not edit by hand.\n"
+        "#ifndef %s_GEN_H\n"
+        "#define %s_GEN_H\n\n"
+        "static const unsigned int %s_size = %u;\n\n"
+        "static const unsigned char %s_data[] = {\n",
+        input_path, var_name, var_name, var_name, (unsigned)src.count, var_name);
+    size_t header_len = strlen(header);
+    sb_ensure(&out, header_len);
+    memcpy(out.items + out.count, header, header_len);
+    out.count += header_len;
+
+    for (size_t i = 0; i < src.count; i += 16) {
+        sb_ensure(&out, 4 + 16 * 6 + 2);
+        memcpy(out.items + out.count, "    ", 4);
+        out.count += 4;
+        size_t end = i + 16;
+        if (end > src.count) end = src.count;
+        for (size_t j = i; j < end; j++) {
+            unsigned char b = (unsigned char)src.items[j];
+            char hex[7];
+            int n = snprintf(hex, sizeof(hex), "0x%02x, ", b);
+            memcpy(out.items + out.count, hex, (size_t)n);
+            out.count += (size_t)n;
+        }
+        out.items[out.count++] = '\n';
+    }
+
+    const char *footer = "};\n\n#endif\n";
+    size_t footer_len = strlen(footer);
+    sb_ensure(&out, footer_len);
+    memcpy(out.items + out.count, footer, footer_len);
+    out.count += footer_len;
+
+    bool ok = write_entire_file(output_path, out.items, out.count);
+    sb_free(&src);
+    sb_free(&out);
+    return ok;
+}
+
+////////////////////////////////
+// SPIR-V shader compilation
+
+bool compile_shader(const char *glslc_path, const char *src, const char *spv_path, const char *stage) {
+    Cmd cmd = {0};
+    cmd_append(&cmd, glslc_path, temp_sprintf("-fshader-stage=%s", stage), "-o", spv_path, src);
+    return cmd_run(&cmd);
+}
+
+bool embed_spirv(const char *spv_path, const char *header_path, const char *array_name) {
+    String_Builder sb = {0};
+    if (!sb_read_file(&sb, spv_path)) return false;
+
+    FILE *out = fopen(header_path, "wb");
+    if (!out) {
+        build_log(LOG_ERROR, "Could not open %s for writing", header_path);
+        sb_free(&sb);
+        return false;
+    }
+
+    fprintf(out, "// Auto-generated from %s — do not edit\n", spv_path);
+    fprintf(out, "#pragma once\n\n");
+    size_t word_count = sb.count / 4;
+    fprintf(out, "#include <stdint.h>\n\n");
+    fprintf(out, "static const uint32_t %s[] = {\n", array_name);
+    const uint32_t *words = (const uint32_t *)sb.items;
+    for (size_t i = 0; i < word_count; i++) {
+        if (i % 8 == 0) fprintf(out, "    ");
+        fprintf(out, "0x%08x,", words[i]);
+        if (i % 8 == 7 || i == word_count - 1) fprintf(out, "\n");
+    }
+    fprintf(out, "};\n");
+
+    fclose(out);
+    build_log(LOG_INFO, "Generated %s (%zu bytes)", header_path, sb.count);
+    sb_free(&sb);
+    return true;
+}
+
+#endif // BUILD_IMPLEMENTATION

c/config/config.c

@@ -0,0 +1,235 @@
+// config.c — Global program configuration (config.ini next to binary)
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#ifdef __APPLE__
+#include <unistd.h>
+#include <libgen.h>
+#include <mach-o/dyld.h>
+#else
+#include <windows.h>
+#endif
+
+Config g_config = {0};
+
+////////////////////////////////
+// Path resolution
+
+static void config_get_path(char *out, S32 out_size) {
+    char exe_path[CONFIG_PATH_MAX];
+#ifdef __APPLE__
+    U32 sz = sizeof(exe_path);
+    _NSGetExecutablePath(exe_path, &sz);
+#else
+    GetModuleFileNameA(NULL, exe_path, CONFIG_PATH_MAX);
+#endif
+    // Strip binary name to get directory
+    char *sep = strrchr(exe_path, '/');
+#ifndef __APPLE__
+    char *bsep = strrchr(exe_path, '\\');
+    if (bsep && (!sep || bsep > sep)) sep = bsep;
+#endif
+    if (sep) sep[1] = '\0';
+    snprintf(out, out_size, "%sconfig.ini", exe_path);
+}
+
+////////////////////////////////
+// Helpers
+
+static void config_trim(char *s) {
+    char *start = s;
+    while (*start == ' ' || *start == '\t') start++;
+    if (start != s) memmove(s, start, strlen(start) + 1);
+    S32 len = (S32)strlen(s);
+    while (len > 0 && (s[len - 1] == ' ' || s[len - 1] == '\t' ||
+                       s[len - 1] == '\r' || s[len - 1] == '\n'))
+        s[--len] = '\0';
+}
+
+////////////////////////////////
+// Defaults
+
+static void config_set_defaults(void) {
+    MemoryZeroStruct(&g_config);
+    snprintf(g_config.theme, sizeof(g_config.theme), "%s", "Gruvbox Dark");
+    g_config.show_line_numbers = 1;
+    g_config.syntax_enabled = 1;
+    g_config.block_cursor = 1;
+    g_config.cursor_smear = 1;
+    g_config.smooth_scroll = 1;
+    g_config.ui_scale = 1.0f;
+    g_config.editor_font_size = 15.0f;
+    snprintf(g_config.editor_font, sizeof(g_config.editor_font), "%s", "FiraCode");
+    snprintf(g_config.ui_font, sizeof(g_config.ui_font), "%s", "Inter");
+    g_config.window_width = 1280;
+    g_config.window_height = 800;
+    g_config.active_project[0] = '\0';
+    g_config.recent_dir_count = 0;
+}
+
+////////////////////////////////
+// Load
+
+static void config_load(void) {
+    config_set_defaults();
+
+    char path[CONFIG_PATH_MAX];
+    config_get_path(path, sizeof(path));
+
+    FILE *f = fopen(path, "rb");
+    if (!f) {
+        // No config file — write defaults
+        config_save();
+        return;
+    }
+
+    char line_buf[CONFIG_PATH_MAX + 64];
+    char current_section[64] = {0};
+
+    while (fgets(line_buf, sizeof(line_buf), f)) {
+        config_trim(line_buf);
+        if (line_buf[0] == '\0' || line_buf[0] == '#' || line_buf[0] == ';')
+            continue;
+
+        // Section header
+        if (line_buf[0] == '[') {
+            char *close = strchr(line_buf, ']');
+            if (close) {
+                *close = '\0';
+                snprintf(current_section, sizeof(current_section), "%s", line_buf + 1);
+            }
+            continue;
+        }
+
+        // Key = value
+        char *eq = strchr(line_buf, '=');
+        if (!eq) continue;
+        *eq = '\0';
+        char *key = line_buf;
+        char *val = eq + 1;
+        config_trim(key);
+        config_trim(val);
+
+        if (strcmp(current_section, "general") == 0) {
+            if (strcmp(key, "theme") == 0)
+                snprintf(g_config.theme, sizeof(g_config.theme), "%s", val);
+            else if (strcmp(key, "show_line_numbers") == 0)
+                g_config.show_line_numbers = (strcmp(val, "true") == 0);
+            else if (strcmp(key, "syntax_enabled") == 0)
+                g_config.syntax_enabled = (strcmp(val, "true") == 0);
+            else if (strcmp(key, "block_cursor") == 0)
+                g_config.block_cursor = (strcmp(val, "true") == 0);
+            else if (strcmp(key, "cursor_smear") == 0)
+                g_config.cursor_smear = (strcmp(val, "true") == 0);
+            else if (strcmp(key, "smooth_scroll") == 0)
+                g_config.smooth_scroll = (strcmp(val, "true") == 0);
+            else if (strcmp(key, "ui_scale") == 0)
+                g_config.ui_scale = (F32)atof(val);
+            else if (strcmp(key, "editor_font_size") == 0)
+                g_config.editor_font_size = (F32)atof(val);
+            else if (strcmp(key, "editor_font") == 0)
+                snprintf(g_config.editor_font, sizeof(g_config.editor_font), "%s", val);
+            else if (strcmp(key, "ui_font") == 0)
+                snprintf(g_config.ui_font, sizeof(g_config.ui_font), "%s", val);
+            else if (strcmp(key, "active_project") == 0)
+                snprintf(g_config.active_project, sizeof(g_config.active_project), "%s", val);
+            else if (strcmp(key, "window_width") == 0)
+                g_config.window_width = atoi(val);
+            else if (strcmp(key, "window_height") == 0)
+                g_config.window_height = atoi(val);
+        } else if (strcmp(current_section, "recent_dirs") == 0) {
+            // Keys are "0", "1", "2", etc.
+            S32 idx = atoi(key);
+            if (idx >= 0 && idx < CONFIG_MAX_RECENT_DIRS && val[0] != '\0') {
+                snprintf(g_config.recent_dirs[idx], CONFIG_PATH_MAX, "%s", val);
+                if (idx + 1 > g_config.recent_dir_count)
+                    g_config.recent_dir_count = idx + 1;
+            }
+        }
+    }
+
+    fclose(f);
+}
+
+////////////////////////////////
+// Save
+
+static void config_save(void) {
+    char path[CONFIG_PATH_MAX];
+    config_get_path(path, sizeof(path));
+
+    FILE *f = fopen(path, "wb");
+    if (!f) return;
+
+    fprintf(f, "# codeMAX configuration — managed by the program\r\n\r\n");
+
+    fprintf(f, "[general]\r\n");
+    fprintf(f, "theme = %s\r\n", g_config.theme);
+    fprintf(f, "show_line_numbers = %s\r\n", g_config.show_line_numbers ? "true" : "false");
+    fprintf(f, "syntax_enabled = %s\r\n", g_config.syntax_enabled ? "true" : "false");
+    fprintf(f, "block_cursor = %s\r\n", g_config.block_cursor ? "true" : "false");
+    fprintf(f, "cursor_smear = %s\r\n", g_config.cursor_smear ? "true" : "false");
+    fprintf(f, "smooth_scroll = %s\r\n", g_config.smooth_scroll ? "true" : "false");
+    fprintf(f, "ui_scale = %.2f\r\n", g_config.ui_scale);
+    fprintf(f, "editor_font_size = %.1f\r\n", g_config.editor_font_size);
+    fprintf(f, "editor_font = %s\r\n", g_config.editor_font);
+    fprintf(f, "ui_font = %s\r\n", g_config.ui_font);
+    fprintf(f, "window_width = %d\r\n", g_config.window_width);
+    fprintf(f, "window_height = %d\r\n", g_config.window_height);
+    if (g_config.active_project[0] != '\0')
+        fprintf(f, "active_project = %s\r\n", g_config.active_project);
+
+    fprintf(f, "\r\n[recent_dirs]\r\n");
+    for (S32 i = 0; i < g_config.recent_dir_count; i++) {
+        if (g_config.recent_dirs[i][0] != '\0')
+            fprintf(f, "%d = %s\r\n", i, g_config.recent_dirs[i]);
+    }
+
+    fclose(f);
+}
+
+////////////////////////////////
+// Recent directories
+
+static void config_push_recent_dir(const char *dir) {
+    if (!dir || dir[0] == '\0') return;
+
+    // Normalize path for comparison
+    char norm[CONFIG_PATH_MAX];
+    snprintf(norm, sizeof(norm), "%s", dir);
+    for (char *p = norm; *p; p++) {
+        if (*p == '/') *p = '\\';
+    }
+
+    // Check if already in list — if so, move to front
+    S32 existing = -1;
+    for (S32 i = 0; i < g_config.recent_dir_count; i++) {
+#ifdef __APPLE__
+        if (strcmp(g_config.recent_dirs[i], norm) == 0) { existing = i; break; }
+#else
+        if (_stricmp(g_config.recent_dirs[i], norm) == 0) { existing = i; break; }
+#endif
+    }
+
+    if (existing == 0) return; // already at front
+
+    // Save the entry if it exists, or use the new dir
+    char entry[CONFIG_PATH_MAX];
+    snprintf(entry, sizeof(entry), "%s", norm);
+
+    // Shift entries down
+    S32 start = (existing >= 0) ? existing : g_config.recent_dir_count;
+    if (start >= CONFIG_MAX_RECENT_DIRS) start = CONFIG_MAX_RECENT_DIRS - 1;
+    for (S32 i = start; i > 0; i--)
+        memcpy(g_config.recent_dirs[i], g_config.recent_dirs[i - 1], CONFIG_PATH_MAX);
+
+    // Insert at front
+    snprintf(g_config.recent_dirs[0], CONFIG_PATH_MAX, "%s", entry);
+
+    if (existing < 0 && g_config.recent_dir_count < CONFIG_MAX_RECENT_DIRS)
+        g_config.recent_dir_count++;
+
+    config_save();
+}

c/config/config.h

@@ -0,0 +1,51 @@
+#pragma once
+// config.h — Global program configuration (config.ini next to binary)
+//
+// Stores internal program state: active theme, recent project directories,
+// and other preferences. This file is managed by the program, not the user.
+// Per-project settings belong in .editorconfig.
+
+#include "base/base_inc.h"
+
+////////////////////////////////
+// Constants
+
+#define CONFIG_MAX_RECENT_DIRS  10
+#define CONFIG_PATH_MAX         1024
+
+////////////////////////////////
+// Config state
+
+typedef struct Config {
+    char theme[64];                                    // active theme name
+    char recent_dirs[CONFIG_MAX_RECENT_DIRS][CONFIG_PATH_MAX]; // most recent first
+    S32  recent_dir_count;
+    B32  show_line_numbers;
+    B32  syntax_enabled;
+    B32  block_cursor;
+    B32  cursor_smear;
+    B32  smooth_scroll;
+    F32  ui_scale;
+    F32  editor_font_size;
+    char editor_font[64];          // "FiraCode", "JetBrains Mono", "Cascadia Mono"
+    char ui_font[64];              // "Inter", "FiraCode", etc.
+    S32  window_width;
+    S32  window_height;
+    char active_project[CONFIG_PATH_MAX];
+} Config;
+
+// Global config instance
+extern Config g_config;
+
+// Resolve the path to config.ini (next to the running binary).
+static void config_get_path(char *out, S32 out_size);
+
+// Load config from disk. Populates g_config. If the file doesn't exist,
+// writes a default one and returns defaults.
+static void config_load(void);
+
+// Save current g_config state to disk.
+static void config_save(void);
+
+// Push a directory to the front of the recent list (deduplicates).
+static void config_push_recent_dir(const char *dir);

c/installer/installer.c

@@ -0,0 +1,604 @@
+#define _CRT_SECURE_NO_WARNINGS
+// installer.c — Self-contained Windows installer for codeMAX
+//
+// Uses Win32 PropertySheet wizard for the UI, embeds payload EXEs as
+// resources, and handles PATH, Start Menu, and Add/Remove Programs.
+//
+// When invoked with /uninstall, runs the uninstaller instead.
+
+#include <windows.h>
+#include <commctrl.h>
+#include <shlobj.h>
+#include <objbase.h>
+#include <shobjidl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#pragma comment(lib, "comctl32.lib")
+#pragma comment(lib, "ole32.lib")
+#pragma comment(lib, "shell32.lib")
+#pragma comment(lib, "advapi32.lib")
+#pragma comment(lib, "user32.lib")
+#pragma comment(lib, "gdi32.lib")
+#pragma comment(lib, "uuid.lib")
+#pragma comment(linker, "/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'\"")
+
+#include "installer.h"
+
+// Use codebase types
+typedef unsigned char      U8;
+typedef unsigned short     U16;
+typedef unsigned int       U32;
+typedef unsigned long long U64;
+typedef int                S32;
+typedef int                B32;
+
+#define ArrayCount(a) (sizeof(a) / sizeof((a)[0]))
+
+////////////////////////////////
+// Globals
+
+static wchar_t g_install_dir[MAX_PATH];
+static B32 g_add_to_path = 1;
+static HINSTANCE g_hinst;
+
+////////////////////////////////
+// Helpers
+
+static B32 extract_resource(S32 resource_id, const wchar_t *dest_path) {
+    HRSRC res = FindResourceW(NULL, MAKEINTRESOURCEW(resource_id), (LPCWSTR)RT_RCDATA);
+    if (!res) return 0;
+    HGLOBAL h = LoadResource(NULL, res);
+    if (!h) return 0;
+    void *data = LockResource(h);
+    DWORD size = SizeofResource(NULL, res);
+    if (!data || size == 0) return 0;
+
+    HANDLE f = CreateFileW(dest_path, GENERIC_WRITE, 0, NULL,
+                           CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
+    if (f == INVALID_HANDLE_VALUE) return 0;
+    DWORD written;
+    WriteFile(f, data, size, &written, NULL);
+    CloseHandle(f);
+    return written == size;
+}
+
+static B32 create_directory_recursive(const wchar_t *path) {
+    wchar_t tmp[MAX_PATH];
+    wcscpy_s(tmp, MAX_PATH, path);
+    for (wchar_t *p = tmp + 3; *p; p++) { // skip "C:\"
+        if (*p == L'\\' || *p == L'/') {
+            *p = 0;
+            CreateDirectoryW(tmp, NULL);
+            *p = L'\\';
+        }
+    }
+    return CreateDirectoryW(tmp, NULL) || GetLastError() == ERROR_ALREADY_EXISTS;
+}
+
+static B32 create_shortcut(const wchar_t *lnk_path, const wchar_t *target,
+                           const wchar_t *work_dir, const wchar_t *description,
+                           const wchar_t *icon_path) {
+    HRESULT hr;
+    IShellLinkW *sl = NULL;
+    hr = CoCreateInstance(&CLSID_ShellLink, NULL, CLSCTX_INPROC_SERVER,
+                          &IID_IShellLinkW, (void **)&sl);
+    if (FAILED(hr)) return 0;
+
+    sl->lpVtbl->SetPath(sl, target);
+    sl->lpVtbl->SetWorkingDirectory(sl, work_dir);
+    if (description) sl->lpVtbl->SetDescription(sl, description);
+    if (icon_path) sl->lpVtbl->SetIconLocation(sl, icon_path, 0);
+
+    IPersistFile *pf = NULL;
+    hr = sl->lpVtbl->QueryInterface(sl, &IID_IPersistFile, (void **)&pf);
+    B32 ok = 0;
+    if (SUCCEEDED(hr)) {
+        ok = SUCCEEDED(pf->lpVtbl->Save(pf, lnk_path, TRUE));
+        pf->lpVtbl->Release(pf);
+    }
+    sl->lpVtbl->Release(sl);
+    return ok;
+}
+
+static B32 path_add(const wchar_t *dir) {
+    HKEY key;
+    if (RegOpenKeyExW(HKEY_LOCAL_MACHINE,
+                      L"SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Environment",
+                      0, KEY_READ | KEY_WRITE, &key) != ERROR_SUCCESS) return 0;
+
+    wchar_t buf[8192] = {0};
+    DWORD buf_size = sizeof(buf) - sizeof(wchar_t);
+    DWORD type = REG_EXPAND_SZ;
+    RegQueryValueExW(key, L"Path", NULL, &type, (BYTE *)buf, &buf_size);
+
+    // Check if already present
+    if (wcsstr(buf, dir)) {
+        RegCloseKey(key);
+        return 1;
+    }
+
+    // Append
+    S32 len = (S32)wcslen(buf);
+    if (len > 0 && buf[len - 1] != L';')
+        wcscat_s(buf, ArrayCount(buf), L";");
+    wcscat_s(buf, ArrayCount(buf), dir);
+
+    RegSetValueExW(key, L"Path", 0, type,
+                   (BYTE *)buf, (DWORD)((wcslen(buf) + 1) * sizeof(wchar_t)));
+    RegCloseKey(key);
+    return 1;
+}
+
+static void path_remove(const wchar_t *dir) {
+    HKEY key;
+    if (RegOpenKeyExW(HKEY_LOCAL_MACHINE,
+                      L"SYSTEM\\CurrentControlSet\\Control\\Session Manager\\Environment",
+                      0, KEY_READ | KEY_WRITE, &key) != ERROR_SUCCESS) return;
+
+    wchar_t buf[8192] = {0};
+    DWORD buf_size = sizeof(buf) - sizeof(wchar_t);
+    DWORD type = REG_EXPAND_SZ;
+    RegQueryValueExW(key, L"Path", NULL, &type, (BYTE *)buf, &buf_size);
+
+    wchar_t result[8192] = {0};
+    wchar_t *ctx = NULL;
+    wchar_t copy[8192];
+    wcscpy_s(copy, ArrayCount(copy), buf);
+
+    wchar_t *tok = wcstok_s(copy, L";", &ctx);
+    B32 first = 1;
+    while (tok) {
+        if (_wcsicmp(tok, dir) != 0) {
+            if (!first) wcscat_s(result, ArrayCount(result), L";");
+            wcscat_s(result, ArrayCount(result), tok);
+            first = 0;
+        }
+        tok = wcstok_s(NULL, L";", &ctx);
+    }
+
+    RegSetValueExW(key, L"Path", 0, type,
+                   (BYTE *)result, (DWORD)((wcslen(result) + 1) * sizeof(wchar_t)));
+    RegCloseKey(key);
+}
+
+static void broadcast_env_change(void) {
+    SendMessageTimeoutW(HWND_BROADCAST, WM_SETTINGCHANGE, 0,
+                        (LPARAM)L"Environment", SMTO_ABORTIFHUNG, 5000, NULL);
+}
+
+////////////////////////////////
+// In-memory dialog template builder
+
+typedef struct {
+    U8  data[4096];
+    S32 len;
+} DlgBuf;
+
+static void dlg_align(DlgBuf *b, S32 align) {
+    while (b->len % align) b->data[b->len++] = 0;
+}
+
+static void dlg_write(DlgBuf *b, const void *src, S32 n) {
+    memcpy(b->data + b->len, src, n);
+    b->len += n;
+}
+
+static void dlg_write16(DlgBuf *b, U16 v) { dlg_write(b, &v, 2); }
+static void dlg_write32(DlgBuf *b, U32 v) { dlg_write(b, &v, 4); }
+
+static void dlg_write_wstr(DlgBuf *b, const wchar_t *s) {
+    S32 n = (S32)((wcslen(s) + 1) * sizeof(wchar_t));
+    dlg_write(b, s, n);
+}
+
+static DLGTEMPLATE *build_page_template(DlgBuf *b, S32 w, S32 h) {
+    b->len = 0;
+    // DLGTEMPLATE
+    DLGTEMPLATE *dt = (DLGTEMPLATE *)b->data;
+    dlg_write32(b, WS_CHILD | WS_VISIBLE | DS_SHELLFONT); // style
+    dlg_write32(b, 0);         // dwExtendedStyle
+    dlg_write16(b, 0);         // cdit (control count, filled later)
+    dlg_write16(b, 0);         // x
+    dlg_write16(b, 0);         // y
+    dlg_write16(b, (U16)w);   // cx
+    dlg_write16(b, (U16)h);   // cy
+    dlg_write16(b, 0);         // menu (none)
+    dlg_write16(b, 0);         // class (default)
+    dlg_write_wstr(b, L"");    // title
+    // DS_SHELLFONT font
+    dlg_write16(b, 9);         // point size
+    dlg_write_wstr(b, L"Segoe UI");
+    return dt;
+}
+
+static void add_control(DlgBuf *b, DLGTEMPLATE *dt, U32 style, S32 x, S32 y,
+                         S32 w, S32 h, S32 id, const wchar_t *cls, const wchar_t *text) {
+    dlg_align(b, 4);
+    // DLGITEMTEMPLATE
+    dlg_write32(b, style | WS_CHILD | WS_VISIBLE); // style
+    dlg_write32(b, 0);         // dwExtendedStyle
+    dlg_write16(b, (U16)x);
+    dlg_write16(b, (U16)y);
+    dlg_write16(b, (U16)w);
+    dlg_write16(b, (U16)h);
+    dlg_write16(b, (U16)id);
+    dlg_write_wstr(b, cls);
+    dlg_write_wstr(b, text);
+    dlg_write16(b, 0);         // creation data
+    dt->cdit++;
+}
+
+////////////////////////////////
+// Page IDs for controls
+
+#define IDC_DIR_EDIT    1001
+#define IDC_DIR_BROWSE  1002
+#define IDC_PATH_CHK    1003
+#define IDC_PROGRESS    1004
+#define IDC_STATUS      1005
+#define IDC_LAUNCH_CHK  1006
+
+////////////////////////////////
+// Wizard pages
+
+static INT_PTR CALLBACK welcome_proc(HWND dlg, UINT msg, WPARAM wp, LPARAM lp) {
+    switch (msg) {
+    case WM_INITDIALOG:
+        return TRUE;
+    case WM_NOTIFY: {
+        NMHDR *nm = (NMHDR *)lp;
+        if (nm->code == PSN_SETACTIVE) {
+            PropSheet_SetWizButtons(GetParent(dlg), PSWIZB_NEXT);
+            SetWindowLongPtrW(dlg, DWLP_MSGRESULT, 0);
+        }
+        return TRUE;
+    }
+    }
+    return FALSE;
+}
+
+static INT_PTR CALLBACK dir_proc(HWND dlg, UINT msg, WPARAM wp, LPARAM lp) {
+    switch (msg) {
+    case WM_INITDIALOG:
+        SetDlgItemTextW(dlg, IDC_DIR_EDIT, g_install_dir);
+        CheckDlgButton(dlg, IDC_PATH_CHK, g_add_to_path ? BST_CHECKED : BST_UNCHECKED);
+        return TRUE;
+    case WM_COMMAND:
+        if (LOWORD(wp) == IDC_DIR_BROWSE) {
+            BROWSEINFOW bi = {0};
+            bi.hwndOwner = dlg;
+            bi.lpszTitle = L"Select installation directory:";
+            bi.ulFlags = BIF_RETURNONLYFSDIRS | BIF_NEWDIALOGSTYLE;
+            LPITEMIDLIST pidl = SHBrowseForFolderW(&bi);
+            if (pidl) {
+                wchar_t path[MAX_PATH];
+                SHGetPathFromIDListW(pidl, path);
+                wcscat_s(path, MAX_PATH, L"\\codeMAX");
+                SetDlgItemTextW(dlg, IDC_DIR_EDIT, path);
+                CoTaskMemFree(pidl);
+            }
+        }
+        return TRUE;
+    case WM_NOTIFY: {
+        NMHDR *nm = (NMHDR *)lp;
+        if (nm->code == PSN_SETACTIVE)
+            PropSheet_SetWizButtons(GetParent(dlg), PSWIZB_BACK | PSWIZB_NEXT);
+        if (nm->code == PSN_WIZNEXT) {
+            GetDlgItemTextW(dlg, IDC_DIR_EDIT, g_install_dir, MAX_PATH);
+            g_add_to_path = (IsDlgButtonChecked(dlg, IDC_PATH_CHK) == BST_CHECKED);
+        }
+        return TRUE;
+    }
+    }
+    return FALSE;
+}
+
+static B32 do_install(HWND dlg) {
+    HWND prog = GetDlgItem(dlg, IDC_PROGRESS);
+    HWND status = GetDlgItem(dlg, IDC_STATUS);
+    SendMessageW(prog, PBM_SETRANGE, 0, MAKELPARAM(0, 7));
+    SendMessageW(prog, PBM_SETSTEP, 1, 0);
+
+    // 1. Create install directory
+    SetWindowTextW(status, L"Creating install directory...");
+    create_directory_recursive(g_install_dir);
+    SendMessageW(prog, PBM_STEPIT, 0, 0);
+
+    // 2. Extract terminal exe
+    SetWindowTextW(status, L"Installing codemax.exe...");
+    wchar_t path[MAX_PATH];
+    _snwprintf(path, MAX_PATH, L"%s\\codemax.exe", g_install_dir);
+    if (!extract_resource(IDR_EXE_GUI, path)) {
+        MessageBoxW(dlg, L"Failed to extract codemax.exe", L"Error", MB_ICONERROR);
+        return 0;
+    }
+    SendMessageW(prog, PBM_STEPIT, 0, 0);
+
+    // 4. Copy self as uninstaller
+    SetWindowTextW(status, L"Creating uninstaller...");
+    wchar_t self_path[MAX_PATH];
+    GetModuleFileNameW(NULL, self_path, MAX_PATH);
+    _snwprintf(path, MAX_PATH, L"%s\\uninstall.exe", g_install_dir);
+    CopyFileW(self_path, path, FALSE);
+    SendMessageW(prog, PBM_STEPIT, 0, 0);
+
+    // 5. Add to PATH (optional)
+    if (g_add_to_path) {
+        SetWindowTextW(status, L"Updating PATH...");
+        path_add(g_install_dir);
+    }
+    SendMessageW(prog, PBM_STEPIT, 0, 0);
+
+    // 6. Create Start Menu shortcuts
+    SetWindowTextW(status, L"Creating shortcuts...");
+    CoInitialize(NULL);
+    {
+        wchar_t programs[MAX_PATH];
+        SHGetFolderPathW(NULL, CSIDL_COMMON_PROGRAMS, NULL, 0, programs);
+        wchar_t menu_dir[MAX_PATH];
+        _snwprintf(menu_dir, MAX_PATH, L"%s\\codeMAX", programs);
+        CreateDirectoryW(menu_dir, NULL);
+
+        wchar_t exe_path[MAX_PATH];
+        _snwprintf(exe_path, MAX_PATH, L"%s\\codemax.exe", g_install_dir);
+
+        wchar_t lnk[MAX_PATH];
+        _snwprintf(lnk, MAX_PATH, L"%s\\codeMAX.lnk", menu_dir);
+        create_shortcut(lnk, exe_path, g_install_dir,
+                        L"codeMAX Text Editor", exe_path);
+    }
+    CoUninitialize();
+    SendMessageW(prog, PBM_STEPIT, 0, 0);
+
+    // 7. Register in Add/Remove Programs
+    SetWindowTextW(status, L"Registering application...");
+    {
+        HKEY key;
+        RegCreateKeyExA(HKEY_LOCAL_MACHINE, CODEMAX_UNINSTALL_KEY,
+                        0, NULL, 0, KEY_WRITE, NULL, &key, NULL);
+
+        char dir_a[MAX_PATH], uninst[MAX_PATH * 2];
+        WideCharToMultiByte(CP_UTF8, 0, g_install_dir, -1, dir_a, MAX_PATH, NULL, NULL);
+        snprintf(uninst, sizeof(uninst), "\"%s\\uninstall.exe\" /uninstall", dir_a);
+
+        RegSetValueExA(key, "DisplayName", 0, REG_SZ,
+                       (BYTE *)CODEMAX_DISPLAY_NAME, (DWORD)strlen(CODEMAX_DISPLAY_NAME) + 1);
+        RegSetValueExA(key, "DisplayVersion", 0, REG_SZ,
+                       (BYTE *)CODEMAX_VERSION, (DWORD)strlen(CODEMAX_VERSION) + 1);
+        RegSetValueExA(key, "Publisher", 0, REG_SZ,
+                       (BYTE *)CODEMAX_PUBLISHER, (DWORD)strlen(CODEMAX_PUBLISHER) + 1);
+        RegSetValueExA(key, "InstallLocation", 0, REG_SZ,
+                       (BYTE *)dir_a, (DWORD)strlen(dir_a) + 1);
+        RegSetValueExA(key, "UninstallString", 0, REG_SZ,
+                       (BYTE *)uninst, (DWORD)strlen(uninst) + 1);
+
+        char icon[MAX_PATH + 4];
+        snprintf(icon, sizeof(icon), "%s\\codemax.exe,0", dir_a);
+        RegSetValueExA(key, "DisplayIcon", 0, REG_SZ,
+                       (BYTE *)icon, (DWORD)strlen(icon) + 1);
+
+        DWORD one = 1;
+        RegSetValueExA(key, "NoModify", 0, REG_DWORD, (BYTE *)&one, sizeof(one));
+        RegSetValueExA(key, "NoRepair", 0, REG_DWORD, (BYTE *)&one, sizeof(one));
+
+        RegCloseKey(key);
+    }
+    SendMessageW(prog, PBM_STEPIT, 0, 0);
+
+    broadcast_env_change();
+    SetWindowTextW(status, L"Installation complete.");
+    return 1;
+}
+
+static INT_PTR CALLBACK progress_proc(HWND dlg, UINT msg, WPARAM wp, LPARAM lp) {
+    switch (msg) {
+    case WM_INITDIALOG:
+        return TRUE;
+    case WM_NOTIFY: {
+        NMHDR *nm = (NMHDR *)lp;
+        if (nm->code == PSN_SETACTIVE) {
+            // Disable all buttons during install
+            PropSheet_SetWizButtons(GetParent(dlg), 0);
+            // Run install
+            if (do_install(dlg)) {
+                PropSheet_SetWizButtons(GetParent(dlg), PSWIZB_NEXT);
+            } else {
+                PropSheet_SetWizButtons(GetParent(dlg), PSWIZB_BACK);
+            }
+            SetWindowLongPtrW(dlg, DWLP_MSGRESULT, 0);
+        }
+        return TRUE;
+    }
+    }
+    return FALSE;
+}
+
+static INT_PTR CALLBACK finish_proc(HWND dlg, UINT msg, WPARAM wp, LPARAM lp) {
+    switch (msg) {
+    case WM_INITDIALOG:
+        CheckDlgButton(dlg, IDC_LAUNCH_CHK, BST_CHECKED);
+        return TRUE;
+    case WM_NOTIFY: {
+        NMHDR *nm = (NMHDR *)lp;
+        if (nm->code == PSN_SETACTIVE) {
+            PropSheet_SetWizButtons(GetParent(dlg), PSWIZB_FINISH);
+        }
+        if (nm->code == PSN_WIZFINISH) {
+            if (IsDlgButtonChecked(dlg, IDC_LAUNCH_CHK) == BST_CHECKED) {
+                wchar_t exe[MAX_PATH];
+                _snwprintf(exe, MAX_PATH, L"%s\\codemax.exe", g_install_dir);
+                ShellExecuteW(NULL, L"open", exe, NULL, g_install_dir, SW_SHOWNORMAL);
+            }
+        }
+        return TRUE;
+    }
+    }
+    return FALSE;
+}
+
+////////////////////////////////
+// Wizard launcher
+
+static void run_installer(void) {
+    // Default install dir
+    wcscpy_s(g_install_dir, MAX_PATH, L"C:\\Program Files\\codeMAX");
+
+    InitCommonControls();
+
+    // Build page templates in memory
+    DlgBuf bufs[4] = {0};
+    S32 page_w = 317, page_h = 143;
+
+    // Page 0: Welcome
+    DLGTEMPLATE *dt0 = build_page_template(&bufs[0], page_w, page_h);
+    add_control(&bufs[0], dt0, SS_LEFT, 10, 10, 297, 40, -1,
+                L"Static", L"Welcome to the codeMAX installer.\n\n"
+                L"This will install codeMAX on your computer.");
+    add_control(&bufs[0], dt0, SS_LEFT, 10, 60, 297, 20, -1,
+                L"Static", L"Click Next to continue.");
+
+    // Page 1: Directory + options
+    DLGTEMPLATE *dt1 = build_page_template(&bufs[1], page_w, page_h);
+    add_control(&bufs[1], dt1, SS_LEFT, 10, 10, 297, 10, -1,
+                L"Static", L"Choose the installation directory:");
+    add_control(&bufs[1], dt1, ES_AUTOHSCROLL | WS_BORDER | WS_TABSTOP,
+                10, 28, 230, 14, IDC_DIR_EDIT, L"Edit", L"");
+    add_control(&bufs[1], dt1, BS_PUSHBUTTON | WS_TABSTOP,
+                248, 27, 60, 14, IDC_DIR_BROWSE, L"Button", L"Browse...");
+    add_control(&bufs[1], dt1, BS_AUTOCHECKBOX | WS_TABSTOP,
+                10, 52, 250, 14, IDC_PATH_CHK, L"Button", L"Add to system PATH");
+
+    // Page 2: Progress
+    DLGTEMPLATE *dt2 = build_page_template(&bufs[2], page_w, page_h);
+    add_control(&bufs[2], dt2, SS_LEFT, 10, 10, 297, 10, IDC_STATUS,
+                L"Static", L"Installing...");
+    add_control(&bufs[2], dt2, 0, 10, 30, 297, 14, IDC_PROGRESS,
+                PROGRESS_CLASSW, L"");
+
+    // Page 3: Finish
+    DLGTEMPLATE *dt3 = build_page_template(&bufs[3], page_w, page_h);
+    add_control(&bufs[3], dt3, SS_LEFT, 10, 10, 297, 20, -1,
+                L"Static", L"codeMAX has been installed successfully.");
+    add_control(&bufs[3], dt3, BS_AUTOCHECKBOX | WS_TABSTOP,
+                10, 45, 200, 14, IDC_LAUNCH_CHK, L"Button", L"Launch codeMAX GUI");
+
+    PROPSHEETPAGEW pages[4] = {0};
+    for (S32 i = 0; i < 4; i++) {
+        pages[i].dwSize = sizeof(PROPSHEETPAGEW);
+        pages[i].dwFlags = PSP_DLGINDIRECT;
+        pages[i].hInstance = g_hinst;
+    }
+    pages[0].pResource = dt0;
+    pages[0].pfnDlgProc = welcome_proc;
+    pages[1].pResource = dt1;
+    pages[1].pfnDlgProc = dir_proc;
+    pages[2].pResource = dt2;
+    pages[2].pfnDlgProc = progress_proc;
+    pages[3].pResource = dt3;
+    pages[3].pfnDlgProc = finish_proc;
+
+    PROPSHEETHEADERW psh = {0};
+    psh.dwSize = sizeof(PROPSHEETHEADERW);
+    psh.dwFlags = PSH_WIZARD | PSH_PROPSHEETPAGE | PSH_USEICONID;
+    psh.hwndParent = NULL;
+    psh.hInstance = g_hinst;
+    psh.pszIcon = MAKEINTRESOURCEW(IDI_CODEMAX);
+    psh.pszCaption = L"codeMAX Setup";
+    psh.nPages = 4;
+    psh.ppsp = pages;
+
+    PropertySheetW(&psh);
+}
+
+////////////////////////////////
+// Uninstaller
+
+static void run_uninstaller(void) {
+    // Get install dir from our own exe path
+    wchar_t self[MAX_PATH];
+    GetModuleFileNameW(NULL, self, MAX_PATH);
+    wcscpy_s(g_install_dir, MAX_PATH, self);
+    wchar_t *last_sep = wcsrchr(g_install_dir, L'\\');
+    if (last_sep) *last_sep = 0;
+
+    S32 result = MessageBoxW(NULL,
+        L"Are you sure you want to uninstall codeMAX?",
+        L"codeMAX Uninstall", MB_YESNO | MB_ICONQUESTION);
+    if (result != IDYES) return;
+
+    // Delete installed files
+    wchar_t path[MAX_PATH];
+    _snwprintf(path, MAX_PATH, L"%s\\codemax.exe", g_install_dir);
+    DeleteFileW(path);
+    _snwprintf(path, MAX_PATH, L"%s\\codemax.exe", g_install_dir);
+    DeleteFileW(path);
+
+    // Remove from PATH
+    path_remove(g_install_dir);
+    broadcast_env_change();
+
+    // Remove Start Menu shortcuts
+    {
+        wchar_t programs[MAX_PATH];
+        SHGetFolderPathW(NULL, CSIDL_COMMON_PROGRAMS, NULL, 0, programs);
+        wchar_t menu_dir[MAX_PATH];
+        _snwprintf(menu_dir, MAX_PATH, L"%s\\codeMAX", programs);
+
+        _snwprintf(path, MAX_PATH, L"%s\\codeMAX.lnk", menu_dir);
+        DeleteFileW(path);
+        _snwprintf(path, MAX_PATH, L"%s\\codeMAX GUI.lnk", menu_dir);
+        DeleteFileW(path);
+        RemoveDirectoryW(menu_dir);
+    }
+
+    // Remove registry entry
+    RegDeleteKeyA(HKEY_LOCAL_MACHINE, CODEMAX_UNINSTALL_KEY);
+
+    // Schedule self-deletion and remove install dir
+    // Use cmd.exe to wait for us to exit, then delete
+    wchar_t cmd[MAX_PATH * 3];
+    _snwprintf(cmd, ArrayCount(cmd),
+               L"cmd.exe /c timeout /t 2 /nobreak >nul & del \"%s\\uninstall.exe\" & rmdir \"%s\"",
+               g_install_dir, g_install_dir);
+
+    STARTUPINFOW si = {0};
+    si.cb = sizeof(si);
+    si.dwFlags = STARTF_USESHOWWINDOW;
+    si.wShowWindow = SW_HIDE;
+    PROCESS_INFORMATION pi = {0};
+    CreateProcessW(NULL, cmd, NULL, NULL, FALSE,
+                   CREATE_NO_WINDOW, NULL, NULL, &si, &pi);
+    CloseHandle(pi.hProcess);
+    CloseHandle(pi.hThread);
+
+    MessageBoxW(NULL, L"codeMAX has been uninstalled.", L"codeMAX Uninstall",
+                MB_OK | MB_ICONINFORMATION);
+}
+
+////////////////////////////////
+// Entry point
+
+int main(int argc, char **argv) {
+    (void)argc;
+    g_hinst = GetModuleHandleW(NULL);
+
+    // Check for uninstall flag
+    for (int i = 1; i < argc; i++) {
+        if (strcmp(argv[i], "/uninstall") == 0) {
+            run_uninstaller();
+            return 0;
+        }
+    }
+
+    // Also check via GetCommandLineW for when launched without CRT argc/argv
+    wchar_t *cmdline = GetCommandLineW();
+    if (wcsstr(cmdline, L"/uninstall")) {
+        run_uninstaller();
+        return 0;
+    }
+
+    run_installer();
+    return 0;
+}

c/installer/installer.h

@@ -0,0 +1,16 @@
+#pragma once
+// installer.h — Shared constants for installer and resource script
+
+// Resource IDs
+#define IDI_CODEMAX          101
+#define IDR_EXE_TERMINAL     201
+#define IDR_EXE_GUI          202
+
+// Product info
+#define CODEMAX_APP_NAME     "codemax"
+#define CODEMAX_DISPLAY_NAME "codeMAX"
+#define CODEMAX_VERSION      "1.0.0"
+#define CODEMAX_PUBLISHER    "codeMAX"
+
+// Registry
+#define CODEMAX_UNINSTALL_KEY "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Uninstall\\codeMAX"

c/installer/installer.manifest

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
+<assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
+  <assemblyIdentity type="win32" name="codemax.installer" version="1.0.0.0" processorArchitecture="amd64"/>
+  <trustInfo xmlns="urn:schemas-microsoft-com:asm.v3">
+    <security>
+      <requestedPrivileges>
+        <requestedExecutionLevel level="requireAdministrator" uiAccess="false"/>
+      </requestedPrivileges>
+    </security>
+  </trustInfo>
+  <dependency>
+    <dependentAssembly>
+      <assemblyIdentity type="win32" name="Microsoft.Windows.Common-Controls"
+        version="6.0.0.0" processorArchitecture="*" publicKeyToken="6595b64144ccf1df" language="*"/>
+    </dependentAssembly>
+  </dependency>
+</assembly>

c/installer/installer.rc

@@ -0,0 +1,14 @@
+// installer.rc — Resource script for codemax installer
+// Embeds icon, UAC manifest, and payload executables.
+
+#include "installer.h"
+#include <winresrc.h>
+
+// Application icon
+IDI_CODEMAX ICON "assets\\icons\\codemax.ico"
+
+// UAC elevation manifest
+1 24 "src\\installer\\installer.manifest"
+
+// Payload executable (embedded as RCDATA)
+IDR_EXE_GUI      RCDATA "build_release\\codemax.exe"

c/lexer/lexer.c

@@ -0,0 +1,98 @@
+// lexer.c -- Tokenizer infrastructure, color schemes, common helpers
+
+#include "lexer/lexer.h"
+#include <ctype.h>
+#include <string.h>
+
+const char *g_lang_names[LANG_COUNT] = {
+    "Plain Text",   // LANG_PLAIN_TEXT
+    "C",            // LANG_C
+    "Go",           // LANG_GO
+    "JavaScript",   // LANG_JS
+    "Lua",          // LANG_LUA
+    "SQL",          // LANG_SQL
+};
+
+////////////////////////////////
+// Tokenizer helpers
+
+static void tokenizer_init(Tokenizer *tok, const char *data, S32 length) {
+    tok->buf   = data;
+    tok->t     = data;
+    tok->max_t = data + length;
+    tok->start_t = data;
+}
+
+static void tokenizer_eat_whitespace(Tokenizer *tok) {
+    while (tok->t < tok->max_t && (*tok->t == ' ' || *tok->t == '\t' ||
+           *tok->t == '\n' || *tok->t == '\r'))
+        tok->t++;
+}
+
+static void tokenizer_eat_until_newline(Tokenizer *tok) {
+    while (tok->t < tok->max_t && *tok->t != '\n')
+        tok->t++;
+}
+
+////////////////////////////////
+// Paint helper -- fill out_tokens[start..start+len) with a token type
+
+static void paint_token(U8 *out_tokens, S32 start, S32 len, Token_Type type) {
+    memset(out_tokens + start, (U8)type, len);
+}
+
+////////////////////////////////
+// Language detection
+
+static Lang lexer_detect_lang(const char *filename) {
+    if (!filename) return LANG_PLAIN_TEXT;
+    const char *dot = strrchr(filename, '.');
+    if (!dot) return LANG_PLAIN_TEXT;
+    dot++; // skip the '.'
+
+    if (strcmp(dot, "c") == 0 || strcmp(dot, "h") == 0 ||
+        strcmp(dot, "C") == 0 || strcmp(dot, "H") == 0)
+        return LANG_C;
+
+    if (strcmp(dot, "go") == 0)
+        return LANG_GO;
+
+    if (strcmp(dot, "js") == 0 || strcmp(dot, "mjs") == 0 ||
+        strcmp(dot, "cjs") == 0 || strcmp(dot, "jsx") == 0)
+        return LANG_JS;
+
+    if (strcmp(dot, "lua") == 0)
+        return LANG_LUA;
+
+    if (strcmp(dot, "sql") == 0 || strcmp(dot, "ddl") == 0 ||
+        strcmp(dot, "dml") == 0 || strcmp(dot, "pgsql") == 0 ||
+        strcmp(dot, "plsql") == 0 || strcmp(dot, "psql") == 0)
+        return LANG_SQL;
+
+    return LANG_PLAIN_TEXT;
+}
+
+////////////////////////////////
+// Forward-declare language tokenizers
+
+static void tokenize_c(const char *data, S32 length, U8 *out_tokens);
+static void tokenize_go(const char *data, S32 length, U8 *out_tokens);
+static void tokenize_js(const char *data, S32 length, U8 *out_tokens);
+static void tokenize_lua(const char *data, S32 length, U8 *out_tokens);
+static void tokenize_sql(const char *data, S32 length, U8 *out_tokens);
+
+static void tokenize_plain(const char *data, S32 length, U8 *out_tokens) {
+    (void)data;
+    memset(out_tokens, TOK_DEFAULT, length);
+}
+
+static LexerTokenizeFn lexer_get_tokenize_fn(Lang lang) {
+    switch (lang) {
+    case LANG_C:   return tokenize_c;
+    case LANG_GO:  return tokenize_go;
+    case LANG_JS:  return tokenize_js;
+    case LANG_LUA: return tokenize_lua;
+    case LANG_SQL: return tokenize_sql;
+    default:       return tokenize_plain;
+    }
+}

c/lexer/lexer.h

@@ -0,0 +1,98 @@
+#pragma once
+// lexer.h -- Token types, tokenizer interface, and color scheme
+//
+// Follows the Focus editor pattern: a universal Token_Type enum shared by all
+// languages, a per-byte token-type array on each buffer, and language-specific
+// tokenizer functions that fill that array.
+
+#include "base/base_core.h"
+
+////////////////////////////////
+// Token types (universal across all languages)
+//
+// The enum value doubles as an index into the color map, so CODE_DEFAULT
+// must be 0.  Keep this list ordered -- rendering indexes directly.
+
+typedef enum Token_Type {
+    TOK_DEFAULT = 0,
+
+    TOK_COMMENT,
+    TOK_MULTILINE_COMMENT,
+
+    TOK_STRING_LITERAL,
+    TOK_CHAR_LITERAL,
+
+    TOK_NUMBER,
+    TOK_IDENTIFIER,
+    TOK_FUNCTION,
+
+    TOK_KEYWORD,
+    TOK_TYPE,
+    TOK_VALUE,          // true, false, NULL, nullptr
+    TOK_MODIFIER,       // const, static, volatile, extern ...
+
+    TOK_DIRECTIVE,      // #include, #define, ...
+    TOK_PUNCTUATION,
+    TOK_OPERATION,
+
+    TOK_INVALID,
+
+    TOK_COUNT
+} Token_Type;
+
+////////////////////////////////
+// Language enum
+
+typedef enum Lang {
+    LANG_PLAIN_TEXT = 0,
+    LANG_C,
+    LANG_GO,
+    LANG_JS,
+    LANG_LUA,
+    LANG_SQL,
+    LANG_COUNT
+} Lang;
+
+// Human-readable language names (indexed by Lang)
+extern const char *g_lang_names[LANG_COUNT];
+
+////////////////////////////////
+// Tokenizer state (shared by all language tokenizers)
+
+typedef struct Tokenizer {
+    const char *buf;     // start of buffer data
+    const char *t;       // current scan cursor
+    const char *max_t;   // one past end
+    const char *start_t; // cursor at start of current token
+} Tokenizer;
+
+////////////////////////////////
+// Token (returned by get_next_token functions)
+
+typedef struct Token {
+    S32        start;    // byte offset into buffer
+    S32        len;      // byte length of token
+    Token_Type type;
+} Token;
+
+////////////////////////////////
+// Language tokenizer function signature
+//
+// A tokenizer function takes a buffer's data + length, and writes token types
+// into the `out_tokens` array (one byte per source byte, same length as data).
+// This is the Focus "paint the token array" approach.
+
+typedef void (*LexerTokenizeFn)(const char *data, S32 length, U8 *out_tokens);
+
+// Get the tokenizer function for a language.
+static LexerTokenizeFn lexer_get_tokenize_fn(Lang lang);
+
+// Detect language from a file name / extension.
+static Lang lexer_detect_lang(const char *filename);
+
+////////////////////////////////
+// Common tokenizer helpers (usable by all language tokenizers)
+
+static void tokenizer_init(Tokenizer *tok, const char *data, S32 length);
+static void tokenizer_eat_whitespace(Tokenizer *tok);
+static void tokenizer_eat_until_newline(Tokenizer *tok);

c/lexer/lexer_c.c

@@ -0,0 +1,423 @@
+// lexer_c.c -- C language tokenizer
+//
+// Follows the Focus editor pattern: a get_next_token() loop that advances
+// a cursor through the source, producing Token structs.  After each token,
+// we paint the per-byte token-type array with the token's type.
+// A second pass retroactively marks identifiers followed by '(' as functions.
+
+#include "lexer/lexer.h"
+#include <ctype.h>
+#include <string.h>
+
+////////////////////////////////
+// C keyword tables
+
+typedef struct KeywordEntry {
+    const char *word;
+    Token_Type  type;
+} KeywordEntry;
+
+static const KeywordEntry c_keywords[] = {
+    // Control-flow & language keywords
+    {"auto",            TOK_KEYWORD},
+    {"break",           TOK_KEYWORD},
+    {"case",            TOK_KEYWORD},
+    {"continue",        TOK_KEYWORD},
+    {"default",         TOK_KEYWORD},
+    {"do",              TOK_KEYWORD},
+    {"else",            TOK_KEYWORD},
+    {"enum",            TOK_KEYWORD},
+    {"for",             TOK_KEYWORD},
+    {"goto",            TOK_KEYWORD},
+    {"if",              TOK_KEYWORD},
+    {"inline",          TOK_KEYWORD},
+    {"restrict",        TOK_KEYWORD},
+    {"return",          TOK_KEYWORD},
+    {"sizeof",          TOK_KEYWORD},
+    {"struct",          TOK_KEYWORD},
+    {"switch",          TOK_KEYWORD},
+    {"typedef",         TOK_KEYWORD},
+    {"union",           TOK_KEYWORD},
+    {"while",           TOK_KEYWORD},
+    {"_Alignas",        TOK_KEYWORD},
+    {"alignas",         TOK_KEYWORD},
+    {"_Alignof",        TOK_KEYWORD},
+    {"alignof",         TOK_KEYWORD},
+    {"_Atomic",         TOK_KEYWORD},
+    {"_Generic",        TOK_KEYWORD},
+    {"_Noreturn",       TOK_KEYWORD},
+    {"static_assert",   TOK_KEYWORD},
+    {"_Static_assert",  TOK_KEYWORD},
+
+    // Types
+    {"char",            TOK_TYPE},
+    {"double",          TOK_TYPE},
+    {"float",           TOK_TYPE},
+    {"int",             TOK_TYPE},
+    {"long",            TOK_TYPE},
+    {"short",           TOK_TYPE},
+    {"void",            TOK_TYPE},
+    {"bool",            TOK_TYPE},
+    {"_Bool",           TOK_TYPE},
+    {"_Complex",        TOK_TYPE},
+    {"_Imaginary",      TOK_TYPE},
+    // stdint
+    {"int8_t",          TOK_TYPE},
+    {"int16_t",         TOK_TYPE},
+    {"int32_t",         TOK_TYPE},
+    {"int64_t",         TOK_TYPE},
+    {"uint8_t",         TOK_TYPE},
+    {"uint16_t",        TOK_TYPE},
+    {"uint32_t",        TOK_TYPE},
+    {"uint64_t",        TOK_TYPE},
+    {"size_t",          TOK_TYPE},
+    {"ssize_t",         TOK_TYPE},
+    {"ptrdiff_t",       TOK_TYPE},
+    {"intptr_t",        TOK_TYPE},
+    {"uintptr_t",       TOK_TYPE},
+    {"nullptr_t",       TOK_TYPE},
+    {"FILE",            TOK_TYPE},
+    // Project types
+    {"U8",              TOK_TYPE},
+    {"U16",             TOK_TYPE},
+    {"U32",             TOK_TYPE},
+    {"U64",             TOK_TYPE},
+    {"S8",              TOK_TYPE},
+    {"S16",             TOK_TYPE},
+    {"S32",             TOK_TYPE},
+    {"S64",             TOK_TYPE},
+    {"B32",             TOK_TYPE},
+    {"F32",             TOK_TYPE},
+    {"F64",             TOK_TYPE},
+
+    // Values
+    {"false",           TOK_VALUE},
+    {"true",            TOK_VALUE},
+    {"NULL",            TOK_VALUE},
+    {"nullptr",         TOK_VALUE},
+
+    // Modifiers
+    {"const",           TOK_MODIFIER},
+    {"constexpr",       TOK_MODIFIER},
+    {"extern",          TOK_MODIFIER},
+    {"register",        TOK_MODIFIER},
+    {"signed",          TOK_MODIFIER},
+    {"static",          TOK_MODIFIER},
+    {"unsigned",        TOK_MODIFIER},
+    {"volatile",        TOK_MODIFIER},
+    {"thread_local",    TOK_MODIFIER},
+    {"_Thread_local",   TOK_MODIFIER},
+};
+
+#define C_KEYWORD_COUNT (S32)(sizeof(c_keywords) / sizeof(c_keywords[0]))
+
+static Token_Type c_lookup_keyword(const char *word, S32 len) {
+    for (S32 i = 0; i < C_KEYWORD_COUNT; i++) {
+        const char *kw = c_keywords[i].word;
+        S32 kwlen = (S32)strlen(kw);
+        if (kwlen == len && memcmp(kw, word, len) == 0)
+            return c_keywords[i].type;
+    }
+    return TOK_IDENTIFIER;
+}
+
+////////////////////////////////
+// Character helpers
+
+static B32 c_is_ident_start(char c) {
+    return isalpha((unsigned char)c) || c == '_';
+}
+
+static B32 c_is_ident_char(char c) {
+    return isalnum((unsigned char)c) || c == '_';
+}
+
+static B32 c_is_hex(char c) {
+    return isdigit((unsigned char)c) ||
+           (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
+}
+
+////////////////////////////////
+// Individual token parsers
+
+static Token c_parse_identifier(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    const char *begin = tok->t;
+    while (tok->t < tok->max_t && c_is_ident_char(*tok->t))
+        tok->t++;
+    S32 len = (S32)(tok->t - begin);
+    token.type = c_lookup_keyword(begin, len);
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+static Token c_parse_number(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_NUMBER;
+
+    char start_char = *tok->t;
+    tok->t++;
+    if (tok->t >= tok->max_t) goto done;
+
+    if (start_char == '0' && tok->t < tok->max_t) {
+        if (*tok->t == 'x' || *tok->t == 'X') {
+            tok->t++;
+            while (tok->t < tok->max_t && c_is_hex(*tok->t)) tok->t++;
+            goto suffixes;
+        }
+        if (*tok->t == 'b' || *tok->t == 'B') {
+            tok->t++;
+            while (tok->t < tok->max_t && (*tok->t == '0' || *tok->t == '1')) tok->t++;
+            goto suffixes;
+        }
+    }
+
+    // Decimal / float
+    {
+        B32 seen_dot = 0;
+        while (tok->t < tok->max_t && (isdigit((unsigned char)*tok->t) || *tok->t == '.')) {
+            if (*tok->t == '.') {
+                if (seen_dot) break;
+                seen_dot = 1;
+            }
+            tok->t++;
+        }
+        // Exponent
+        if (tok->t < tok->max_t && (*tok->t == 'e' || *tok->t == 'E')) {
+            tok->t++;
+            if (tok->t < tok->max_t && (*tok->t == '+' || *tok->t == '-')) tok->t++;
+            while (tok->t < tok->max_t && isdigit((unsigned char)*tok->t)) tok->t++;
+        }
+        // Float suffix
+        if (tok->t < tok->max_t && seen_dot) {
+            if (*tok->t == 'f' || *tok->t == 'F' || *tok->t == 'l' || *tok->t == 'L')
+                tok->t++;
+            goto done;
+        }
+    }
+
+suffixes:
+    // Integer suffixes: u, l, ll, ul, ull, lu, llu
+    if (tok->t < tok->max_t && (*tok->t == 'u' || *tok->t == 'U')) {
+        tok->t++;
+        if (tok->t < tok->max_t && (*tok->t == 'l' || *tok->t == 'L')) {
+            tok->t++;
+            if (tok->t < tok->max_t && (*tok->t == 'l' || *tok->t == 'L')) tok->t++;
+        }
+    } else if (tok->t < tok->max_t && (*tok->t == 'l' || *tok->t == 'L')) {
+        tok->t++;
+        if (tok->t < tok->max_t && (*tok->t == 'l' || *tok->t == 'L')) tok->t++;
+        if (tok->t < tok->max_t && (*tok->t == 'u' || *tok->t == 'U')) tok->t++;
+    }
+
+done:
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+static Token c_parse_string(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_STRING_LITERAL;
+
+    B32 escape = 0;
+    tok->t++; // skip opening "
+    while (tok->t < tok->max_t && *tok->t != '\n') {
+        if (*tok->t == '"' && !escape) { tok->t++; break; }
+        escape = !escape && (*tok->t == '\\');
+        tok->t++;
+    }
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+static Token c_parse_char_literal(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_CHAR_LITERAL;
+
+    tok->t++; // skip opening '
+    if (tok->t < tok->max_t && *tok->t == '\\') {
+        tok->t++; // escape char
+        if (tok->t < tok->max_t && *tok->t != '\n') tok->t++; // the escaped char
+    } else if (tok->t < tok->max_t && *tok->t != '\n' && *tok->t != '\'') {
+        tok->t++; // the char
+    }
+    if (tok->t < tok->max_t && *tok->t == '\'') tok->t++; // closing '
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+static Token c_parse_slash_or_comment(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+
+    tok->t++; // skip '/'
+    if (tok->t >= tok->max_t) {
+        token.type = TOK_OPERATION;
+        token.len = 1;
+        return token;
+    }
+
+    if (*tok->t == '/') {
+        // Line comment
+        token.type = TOK_COMMENT;
+        tok->t++;
+        while (tok->t < tok->max_t && *tok->t != '\n') tok->t++;
+    } else if (*tok->t == '*') {
+        // Block comment
+        token.type = TOK_MULTILINE_COMMENT;
+        tok->t++;
+        while (tok->t < tok->max_t) {
+            if (*tok->t == '*' && (tok->t + 1) < tok->max_t && *(tok->t + 1) == '/') {
+                tok->t += 2;
+                break;
+            }
+            tok->t++;
+        }
+    } else if (*tok->t == '=') {
+        token.type = TOK_OPERATION;
+        tok->t++;
+    } else {
+        token.type = TOK_OPERATION;
+    }
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+static Token c_parse_directive(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_DIRECTIVE;
+
+    tok->t++; // skip '#'
+    // Skip whitespace between # and directive name
+    while (tok->t < tok->max_t && (*tok->t == ' ' || *tok->t == '\t')) tok->t++;
+    // Read directive name
+    while (tok->t < tok->max_t && isalpha((unsigned char)*tok->t)) tok->t++;
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+// Two-char operator check
+static Token c_parse_operator(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_OPERATION;
+
+    char c = *tok->t;
+    tok->t++;
+
+    if (tok->t < tok->max_t) {
+        char n = *tok->t;
+        // Two-character operators
+        if ((c == '=' && n == '=') || (c == '!' && n == '=') ||
+            (c == '<' && n == '=') || (c == '>' && n == '=') ||
+            (c == '+' && n == '=') || (c == '-' && n == '=') ||
+            (c == '*' && n == '=') || (c == '%' && n == '=') ||
+            (c == '&' && n == '=') || (c == '|' && n == '=') ||
+            (c == '^' && n == '=') || (c == '+' && n == '+') ||
+            (c == '-' && n == '-') || (c == '&' && n == '&') ||
+            (c == '|' && n == '|') || (c == '<' && n == '<') ||
+            (c == '>' && n == '>') || (c == '-' && n == '>')) {
+            tok->t++;
+        }
+    }
+
+    // Handle negative number literal: operator '-' followed by digit
+    // (not done here -- handled by caller context if needed)
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+////////////////////////////////
+// Main get_next_token
+
+static Token c_get_next_token(Tokenizer *tok) {
+    tokenizer_eat_whitespace(tok);
+
+    Token token = {0};
+    token.start = (S32)(tok->t - tok->buf);
+    token.type = TOK_DEFAULT;
+
+    if (tok->t >= tok->max_t) {
+        token.len = 0;
+        return token; // EOF
+    }
+
+    tok->start_t = tok->t;
+    char c = *tok->t;
+
+    if (c_is_ident_start(c)) {
+        return c_parse_identifier(tok);
+    }
+    if (isdigit((unsigned char)c)) {
+        return c_parse_number(tok);
+    }
+
+    switch (c) {
+    case '"':  return c_parse_string(tok);
+    case '\'': return c_parse_char_literal(tok);
+    case '/':  return c_parse_slash_or_comment(tok);
+    case '#':  return c_parse_directive(tok);
+
+    // Punctuation
+    case ';': case ',': case '.':
+    case '{': case '}': case '(': case ')': case '[': case ']':
+    case '\\':
+        token.type = TOK_PUNCTUATION;
+        tok->t++;
+        token.len = 1;
+        return token;
+
+    // Operators
+    case '=': case '!': case '<': case '>':
+    case '+': case '-': case '*': case '%':
+    case '&': case '|': case '^': case '~':
+    case '?': case ':':
+        return c_parse_operator(tok);
+
+    default:
+        token.type = TOK_INVALID;
+        tok->t++;
+        token.len = 1;
+        return token;
+    }
+}
+
+////////////////////////////////
+// tokenize_c -- main entry point
+//
+// Tokenizes the full buffer and paints out_tokens[] with token types.
+// Second pass: retroactively marks identifiers before '(' as functions.
+
+static void tokenize_c(const char *data, S32 length, U8 *out_tokens) {
+    memset(out_tokens, TOK_DEFAULT, length);
+
+    Tokenizer tok;
+    tokenizer_init(&tok, data, length);
+
+    Token prev = {0};
+    prev.type = TOK_DEFAULT;
+
+    while (tok.t < tok.max_t) {
+        Token token = c_get_next_token(&tok);
+        if (token.len == 0) break;
+
+        paint_token(out_tokens, token.start, token.len, token.type);
+
+        // Retroactively mark identifier before '(' as a function
+        if (token.type == TOK_PUNCTUATION && token.len == 1 &&
+            data[token.start] == '(' && prev.type == TOK_IDENTIFIER) {
+            paint_token(out_tokens, prev.start, prev.len, TOK_FUNCTION);
+        }
+
+        prev = token;
+    }
+}

c/lexer/lexer_go.c

@@ -0,0 +1,489 @@
+// lexer_go.c -- Go language tokenizer
+//
+// Same pattern as lexer_c.c: a get_next_token() loop that advances a cursor
+// through the source, producing Token structs.  After each token we paint
+// the per-byte token-type array.  A second pass marks identifiers before '('
+// as functions.
+
+#include "lexer/lexer.h"
+#include <ctype.h>
+#include <string.h>
+
+////////////////////////////////
+// Go keyword tables
+
+typedef struct GoKeywordEntry {
+    const char *word;
+    Token_Type  type;
+} GoKeywordEntry;
+
+static const GoKeywordEntry go_keywords[] = {
+    // Control-flow & language keywords
+    {"break",           TOK_KEYWORD},
+    {"case",            TOK_KEYWORD},
+    {"chan",             TOK_KEYWORD},
+    {"const",           TOK_KEYWORD},
+    {"continue",        TOK_KEYWORD},
+    {"default",         TOK_KEYWORD},
+    {"defer",           TOK_KEYWORD},
+    {"else",            TOK_KEYWORD},
+    {"fallthrough",     TOK_KEYWORD},
+    {"for",             TOK_KEYWORD},
+    {"func",            TOK_KEYWORD},
+    {"go",              TOK_KEYWORD},
+    {"goto",            TOK_KEYWORD},
+    {"if",              TOK_KEYWORD},
+    {"import",          TOK_KEYWORD},
+    {"interface",       TOK_KEYWORD},
+    {"map",             TOK_KEYWORD},
+    {"package",         TOK_KEYWORD},
+    {"range",           TOK_KEYWORD},
+    {"return",          TOK_KEYWORD},
+    {"select",          TOK_KEYWORD},
+    {"struct",          TOK_KEYWORD},
+    {"switch",          TOK_KEYWORD},
+    {"type",            TOK_KEYWORD},
+    {"var",             TOK_KEYWORD},
+
+    // Built-in types
+    {"bool",            TOK_TYPE},
+    {"byte",            TOK_TYPE},
+    {"complex64",       TOK_TYPE},
+    {"complex128",      TOK_TYPE},
+    {"error",           TOK_TYPE},
+    {"float32",         TOK_TYPE},
+    {"float64",         TOK_TYPE},
+    {"int",             TOK_TYPE},
+    {"int8",            TOK_TYPE},
+    {"int16",           TOK_TYPE},
+    {"int32",           TOK_TYPE},
+    {"int64",           TOK_TYPE},
+    {"rune",            TOK_TYPE},
+    {"string",          TOK_TYPE},
+    {"uint",            TOK_TYPE},
+    {"uint8",           TOK_TYPE},
+    {"uint16",          TOK_TYPE},
+    {"uint32",          TOK_TYPE},
+    {"uint64",          TOK_TYPE},
+    {"uintptr",         TOK_TYPE},
+    {"any",             TOK_TYPE},
+    {"comparable",      TOK_TYPE},
+
+    // Built-in values
+    {"true",            TOK_VALUE},
+    {"false",           TOK_VALUE},
+    {"nil",             TOK_VALUE},
+    {"iota",            TOK_VALUE},
+
+    // Built-in functions (treated as modifiers for distinct coloring)
+    {"append",          TOK_MODIFIER},
+    {"cap",             TOK_MODIFIER},
+    {"clear",           TOK_MODIFIER},
+    {"close",           TOK_MODIFIER},
+    {"complex",         TOK_MODIFIER},
+    {"copy",            TOK_MODIFIER},
+    {"delete",          TOK_MODIFIER},
+    {"imag",            TOK_MODIFIER},
+    {"len",             TOK_MODIFIER},
+    {"make",            TOK_MODIFIER},
+    {"max",             TOK_MODIFIER},
+    {"min",             TOK_MODIFIER},
+    {"new",             TOK_MODIFIER},
+    {"panic",           TOK_MODIFIER},
+    {"print",           TOK_MODIFIER},
+    {"println",         TOK_MODIFIER},
+    {"real",            TOK_MODIFIER},
+    {"recover",         TOK_MODIFIER},
+};
+
+#define GO_KEYWORD_COUNT (S32)(sizeof(go_keywords) / sizeof(go_keywords[0]))
+
+static Token_Type go_lookup_keyword(const char *word, S32 len) {
+    for (S32 i = 0; i < GO_KEYWORD_COUNT; i++) {
+        const char *kw = go_keywords[i].word;
+        S32 kwlen = (S32)strlen(kw);
+        if (kwlen == len && memcmp(kw, word, len) == 0)
+            return go_keywords[i].type;
+    }
+    return TOK_IDENTIFIER;
+}
+
+////////////////////////////////
+// Character helpers
+
+static B32 go_is_ident_start(char c) {
+    return isalpha((unsigned char)c) || c == '_';
+}
+
+static B32 go_is_ident_char(char c) {
+    return isalnum((unsigned char)c) || c == '_';
+}
+
+static B32 go_is_hex(char c) {
+    return isdigit((unsigned char)c) ||
+           (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
+}
+
+static B32 go_is_octal(char c) {
+    return c >= '0' && c <= '7';
+}
+
+////////////////////////////////
+// Individual token parsers
+
+static Token go_parse_identifier(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    const char *begin = tok->t;
+    while (tok->t < tok->max_t && go_is_ident_char(*tok->t))
+        tok->t++;
+    S32 len = (S32)(tok->t - begin);
+    token.type = go_lookup_keyword(begin, len);
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+static Token go_parse_number(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_NUMBER;
+
+    char start_char = *tok->t;
+    tok->t++;
+    if (tok->t >= tok->max_t) goto done;
+
+    if (start_char == '0' && tok->t < tok->max_t) {
+        // Hex: 0x or 0X
+        if (*tok->t == 'x' || *tok->t == 'X') {
+            tok->t++;
+            while (tok->t < tok->max_t && (go_is_hex(*tok->t) || *tok->t == '_')) tok->t++;
+            // Hex float: optional .hex_digits, optional p exponent
+            if (tok->t < tok->max_t && *tok->t == '.') {
+                tok->t++;
+                while (tok->t < tok->max_t && (go_is_hex(*tok->t) || *tok->t == '_')) tok->t++;
+            }
+            if (tok->t < tok->max_t && (*tok->t == 'p' || *tok->t == 'P')) {
+                tok->t++;
+                if (tok->t < tok->max_t && (*tok->t == '+' || *tok->t == '-')) tok->t++;
+                while (tok->t < tok->max_t && (isdigit((unsigned char)*tok->t) || *tok->t == '_')) tok->t++;
+            }
+            goto imaginary;
+        }
+        // Octal: 0o or 0O
+        if (*tok->t == 'o' || *tok->t == 'O') {
+            tok->t++;
+            while (tok->t < tok->max_t && (go_is_octal(*tok->t) || *tok->t == '_')) tok->t++;
+            goto imaginary;
+        }
+        // Binary: 0b or 0B
+        if (*tok->t == 'b' || *tok->t == 'B') {
+            tok->t++;
+            while (tok->t < tok->max_t && (*tok->t == '0' || *tok->t == '1' || *tok->t == '_')) tok->t++;
+            goto imaginary;
+        }
+    }
+
+    // Decimal or float (also handles legacy octal like 0755)
+    while (tok->t < tok->max_t && (isdigit((unsigned char)*tok->t) || *tok->t == '_'))
+        tok->t++;
+
+    // Decimal float: .digits
+    if (tok->t < tok->max_t && *tok->t == '.') {
+        // Check next char is digit to avoid consuming '..' or method calls
+        if ((tok->t + 1) < tok->max_t && isdigit((unsigned char)*(tok->t + 1))) {
+            tok->t++;
+            while (tok->t < tok->max_t && (isdigit((unsigned char)*tok->t) || *tok->t == '_')) tok->t++;
+        } else if ((tok->t + 1) >= tok->max_t || !go_is_ident_start(*(tok->t + 1))) {
+            // Trailing dot like "1." -- still a float in Go
+            tok->t++;
+        }
+    }
+
+    // Exponent
+    if (tok->t < tok->max_t && (*tok->t == 'e' || *tok->t == 'E')) {
+        tok->t++;
+        if (tok->t < tok->max_t && (*tok->t == '+' || *tok->t == '-')) tok->t++;
+        while (tok->t < tok->max_t && (isdigit((unsigned char)*tok->t) || *tok->t == '_')) tok->t++;
+    }
+
+imaginary:
+    // Imaginary suffix
+    if (tok->t < tok->max_t && *tok->t == 'i')
+        tok->t++;
+
+done:
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+// Dot-starting float: .5, .123e4
+static Token go_parse_dot_number(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_NUMBER;
+
+    tok->t++; // skip '.'
+    while (tok->t < tok->max_t && (isdigit((unsigned char)*tok->t) || *tok->t == '_'))
+        tok->t++;
+    // Exponent
+    if (tok->t < tok->max_t && (*tok->t == 'e' || *tok->t == 'E')) {
+        tok->t++;
+        if (tok->t < tok->max_t && (*tok->t == '+' || *tok->t == '-')) tok->t++;
+        while (tok->t < tok->max_t && (isdigit((unsigned char)*tok->t) || *tok->t == '_')) tok->t++;
+    }
+    // Imaginary
+    if (tok->t < tok->max_t && *tok->t == 'i')
+        tok->t++;
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+static Token go_parse_string(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_STRING_LITERAL;
+
+    B32 escape = 0;
+    tok->t++; // skip opening "
+    while (tok->t < tok->max_t && *tok->t != '\n') {
+        if (*tok->t == '"' && !escape) { tok->t++; break; }
+        escape = !escape && (*tok->t == '\\');
+        tok->t++;
+    }
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+// Raw string literal: `...`
+static Token go_parse_raw_string(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_STRING_LITERAL;
+
+    tok->t++; // skip opening `
+    while (tok->t < tok->max_t) {
+        if (*tok->t == '`') { tok->t++; break; }
+        tok->t++;
+    }
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+// Rune literal: 'x', '\n', '\u0041', etc.
+static Token go_parse_rune_literal(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_CHAR_LITERAL;
+
+    tok->t++; // skip opening '
+    if (tok->t < tok->max_t && *tok->t == '\\') {
+        tok->t++; // skip backslash
+        // Consume escape sequence characters
+        if (tok->t < tok->max_t) {
+            char esc = *tok->t;
+            tok->t++;
+            if (esc == 'x') {
+                // \xNN
+                for (int i = 0; i < 2 && tok->t < tok->max_t && go_is_hex(*tok->t); i++) tok->t++;
+            } else if (esc == 'u') {
+                // \uNNNN
+                for (int i = 0; i < 4 && tok->t < tok->max_t && go_is_hex(*tok->t); i++) tok->t++;
+            } else if (esc == 'U') {
+                // \UNNNNNNNN
+                for (int i = 0; i < 8 && tok->t < tok->max_t && go_is_hex(*tok->t); i++) tok->t++;
+            } else if (go_is_octal(esc)) {
+                // \NNN
+                for (int i = 0; i < 2 && tok->t < tok->max_t && go_is_octal(*tok->t); i++) tok->t++;
+            }
+            // else: simple escape like \n, \t, \\, \' -- already consumed
+        }
+    } else if (tok->t < tok->max_t && *tok->t != '\n' && *tok->t != '\'') {
+        tok->t++; // the rune character
+    }
+    if (tok->t < tok->max_t && *tok->t == '\'') tok->t++; // closing '
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+static Token go_parse_slash_or_comment(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+
+    tok->t++; // skip '/'
+    if (tok->t >= tok->max_t) {
+        token.type = TOK_OPERATION;
+        token.len = 1;
+        return token;
+    }
+
+    if (*tok->t == '/') {
+        // Line comment
+        token.type = TOK_COMMENT;
+        tok->t++;
+        while (tok->t < tok->max_t && *tok->t != '\n') tok->t++;
+    } else if (*tok->t == '*') {
+        // Block comment
+        token.type = TOK_MULTILINE_COMMENT;
+        tok->t++;
+        while (tok->t < tok->max_t) {
+            if (*tok->t == '*' && (tok->t + 1) < tok->max_t && *(tok->t + 1) == '/') {
+                tok->t += 2;
+                break;
+            }
+            tok->t++;
+        }
+    } else if (*tok->t == '=') {
+        // /=
+        token.type = TOK_OPERATION;
+        tok->t++;
+    } else {
+        token.type = TOK_OPERATION;
+    }
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+static Token go_parse_operator(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_OPERATION;
+
+    char c = *tok->t;
+    tok->t++;
+
+    if (tok->t < tok->max_t) {
+        char n = *tok->t;
+        // Three-character operators
+        if (c == '<' && n == '<' && (tok->t + 1) < tok->max_t && *(tok->t + 1) == '=') {
+            tok->t += 2; goto done;
+        }
+        if (c == '>' && n == '>' && (tok->t + 1) < tok->max_t && *(tok->t + 1) == '=') {
+            tok->t += 2; goto done;
+        }
+        if (c == '&' && n == '^' && (tok->t + 1) < tok->max_t && *(tok->t + 1) == '=') {
+            tok->t += 2; goto done;
+        }
+        // := (short variable declaration)
+        if (c == ':' && n == '=') { tok->t++; goto done; }
+        // Two-character operators
+        if ((c == '=' && n == '=') || (c == '!' && n == '=') ||
+            (c == '<' && n == '=') || (c == '>' && n == '=') ||
+            (c == '+' && n == '=') || (c == '-' && n == '=') ||
+            (c == '*' && n == '=') || (c == '%' && n == '=') ||
+            (c == '&' && n == '=') || (c == '|' && n == '=') ||
+            (c == '^' && n == '=') || (c == '+' && n == '+') ||
+            (c == '-' && n == '-') || (c == '&' && n == '&') ||
+            (c == '|' && n == '|') || (c == '<' && n == '<') ||
+            (c == '>' && n == '>') || (c == '-' && n == '>') ||
+            (c == '<' && n == '-') || (c == '&' && n == '^')) {
+            tok->t++;
+        }
+    }
+
+done:
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+////////////////////////////////
+// Main get_next_token
+
+static Token go_get_next_token(Tokenizer *tok) {
+    tokenizer_eat_whitespace(tok);
+
+    Token token = {0};
+    token.start = (S32)(tok->t - tok->buf);
+    token.type = TOK_DEFAULT;
+
+    if (tok->t >= tok->max_t) {
+        token.len = 0;
+        return token; // EOF
+    }
+
+    tok->start_t = tok->t;
+    char c = *tok->t;
+
+    if (go_is_ident_start(c)) {
+        return go_parse_identifier(tok);
+    }
+    if (isdigit((unsigned char)c)) {
+        return go_parse_number(tok);
+    }
+
+    switch (c) {
+    case '"':  return go_parse_string(tok);
+    case '`':  return go_parse_raw_string(tok);
+    case '\'': return go_parse_rune_literal(tok);
+    case '/':  return go_parse_slash_or_comment(tok);
+
+    // Dot: could start a float literal like .5
+    case '.':
+        if ((tok->t + 1) < tok->max_t && isdigit((unsigned char)*(tok->t + 1))) {
+            return go_parse_dot_number(tok);
+        }
+        // Ellipsis ... or just punctuation
+        token.type = TOK_PUNCTUATION;
+        tok->t++;
+        if (tok->t < tok->max_t && *tok->t == '.' &&
+            (tok->t + 1) < tok->max_t && *(tok->t + 1) == '.') {
+            tok->t += 2; // consume ...
+        }
+        token.len = (S32)(tok->t - tok->start_t);
+        return token;
+
+    // Punctuation
+    case ';': case ',':
+    case '{': case '}': case '(': case ')': case '[': case ']':
+        token.type = TOK_PUNCTUATION;
+        tok->t++;
+        token.len = 1;
+        return token;
+
+    // Operators
+    case '=': case '!': case '<': case '>':
+    case '+': case '-': case '*': case '%':
+    case '&': case '|': case '^': case '~':
+    case ':':
+        return go_parse_operator(tok);
+
+    default:
+        token.type = TOK_INVALID;
+        tok->t++;
+        token.len = 1;
+        return token;
+    }
+}
+
+////////////////////////////////
+// tokenize_go -- main entry point
+//
+// Tokenizes the full buffer and paints out_tokens[] with token types.
+// Second pass: retroactively marks identifiers before '(' as functions.
+
+static void tokenize_go(const char *data, S32 length, U8 *out_tokens) {
+    memset(out_tokens, TOK_DEFAULT, length);
+
+    Tokenizer tok;
+    tokenizer_init(&tok, data, length);
+
+    Token prev = {0};
+    prev.type = TOK_DEFAULT;
+
+    while (tok.t < tok.max_t) {
+        Token token = go_get_next_token(&tok);
+        if (token.len == 0) break;
+
+        paint_token(out_tokens, token.start, token.len, token.type);
+
+        // Retroactively mark identifier before '(' as a function
+        if (token.type == TOK_PUNCTUATION && token.len == 1 &&
+            data[token.start] == '(' && prev.type == TOK_IDENTIFIER) {
+            paint_token(out_tokens, prev.start, prev.len, TOK_FUNCTION);
+        }
+
+        prev = token;
+    }
+}

c/lexer/lexer_js.c

@@ -0,0 +1,651 @@
+// lexer_js.c -- JavaScript language tokenizer
+//
+// Supports nested tagged template literals with ${...} interpolation.
+// Uses a depth stack to track template literal nesting so that expressions
+// inside ${...} can themselves contain template literals at arbitrary depth.
+//
+// Example:  html`outer ${css`inner ${x}`} rest`
+//           ^^^^ ^^^^^^ ^^^ ^^^^^^ ^ ^  ^^^^^^
+//           func string  func str  id str string
+
+#include "lexer/lexer.h"
+#include <ctype.h>
+#include <string.h>
+
+////////////////////////////////
+// JavaScript keyword tables
+
+typedef struct JSKeywordEntry {
+    const char *word;
+    Token_Type  type;
+} JSKeywordEntry;
+
+static const JSKeywordEntry js_keywords[] = {
+    // Control-flow & language keywords
+    {"break",           TOK_KEYWORD},
+    {"case",            TOK_KEYWORD},
+    {"catch",           TOK_KEYWORD},
+    {"class",           TOK_KEYWORD},
+    {"const",           TOK_KEYWORD},
+    {"continue",        TOK_KEYWORD},
+    {"debugger",        TOK_KEYWORD},
+    {"default",         TOK_KEYWORD},
+    {"delete",          TOK_KEYWORD},
+    {"do",              TOK_KEYWORD},
+    {"else",            TOK_KEYWORD},
+    {"extends",         TOK_KEYWORD},
+    {"finally",         TOK_KEYWORD},
+    {"for",             TOK_KEYWORD},
+    {"function",        TOK_KEYWORD},
+    {"if",              TOK_KEYWORD},
+    {"in",              TOK_KEYWORD},
+    {"instanceof",      TOK_KEYWORD},
+    {"let",             TOK_KEYWORD},
+    {"new",             TOK_KEYWORD},
+    {"of",              TOK_KEYWORD},
+    {"return",          TOK_KEYWORD},
+    {"switch",          TOK_KEYWORD},
+    {"throw",           TOK_KEYWORD},
+    {"try",             TOK_KEYWORD},
+    {"typeof",          TOK_KEYWORD},
+    {"var",             TOK_KEYWORD},
+    {"void",            TOK_KEYWORD},
+    {"while",           TOK_KEYWORD},
+    {"with",            TOK_KEYWORD},
+    {"yield",           TOK_KEYWORD},
+    {"async",           TOK_KEYWORD},
+    {"await",           TOK_KEYWORD},
+
+    // Module keywords (directive-style coloring)
+    {"import",          TOK_DIRECTIVE},
+    {"export",          TOK_DIRECTIVE},
+    {"from",            TOK_DIRECTIVE},
+    {"as",              TOK_DIRECTIVE},
+
+    // Values
+    {"true",            TOK_VALUE},
+    {"false",           TOK_VALUE},
+    {"null",            TOK_VALUE},
+    {"undefined",       TOK_VALUE},
+    {"NaN",             TOK_VALUE},
+    {"Infinity",        TOK_VALUE},
+    {"this",            TOK_VALUE},
+    {"super",           TOK_VALUE},
+
+    // Modifiers / contextual keywords
+    {"static",          TOK_MODIFIER},
+    {"get",             TOK_MODIFIER},
+    {"set",             TOK_MODIFIER},
+};
+
+#define JS_KEYWORD_COUNT (S32)(sizeof(js_keywords) / sizeof(js_keywords[0]))
+
+static Token_Type js_lookup_keyword(const char *word, S32 len) {
+    for (S32 i = 0; i < JS_KEYWORD_COUNT; i++) {
+        const char *kw = js_keywords[i].word;
+        S32 kwlen = (S32)strlen(kw);
+        if (kwlen == len && memcmp(kw, word, len) == 0)
+            return js_keywords[i].type;
+    }
+    return TOK_IDENTIFIER;
+}
+
+////////////////////////////////
+// Character helpers
+
+static B32 js_is_ident_start(char c) {
+    return isalpha((unsigned char)c) || c == '_' || c == '$';
+}
+
+static B32 js_is_ident_char(char c) {
+    return isalnum((unsigned char)c) || c == '_' || c == '$';
+}
+
+static B32 js_is_hex(char c) {
+    return isdigit((unsigned char)c) ||
+           (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
+}
+
+////////////////////////////////
+// Individual token parsers
+
+static Token js_parse_identifier(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    const char *begin = tok->t;
+    while (tok->t < tok->max_t && js_is_ident_char(*tok->t))
+        tok->t++;
+    S32 len = (S32)(tok->t - begin);
+    token.type = js_lookup_keyword(begin, len);
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+static Token js_parse_number(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_NUMBER;
+
+    char start_char = *tok->t;
+    tok->t++;
+    if (tok->t >= tok->max_t) goto done;
+
+    if (start_char == '0' && tok->t < tok->max_t) {
+        // Hex: 0x / 0X
+        if (*tok->t == 'x' || *tok->t == 'X') {
+            tok->t++;
+            while (tok->t < tok->max_t && (js_is_hex(*tok->t) || *tok->t == '_')) tok->t++;
+            if (tok->t < tok->max_t && *tok->t == 'n') tok->t++; // BigInt
+            goto done;
+        }
+        // Octal: 0o / 0O
+        if (*tok->t == 'o' || *tok->t == 'O') {
+            tok->t++;
+            while (tok->t < tok->max_t && ((*tok->t >= '0' && *tok->t <= '7') || *tok->t == '_')) tok->t++;
+            if (tok->t < tok->max_t && *tok->t == 'n') tok->t++;
+            goto done;
+        }
+        // Binary: 0b / 0B
+        if (*tok->t == 'b' || *tok->t == 'B') {
+            tok->t++;
+            while (tok->t < tok->max_t && (*tok->t == '0' || *tok->t == '1' || *tok->t == '_')) tok->t++;
+            if (tok->t < tok->max_t && *tok->t == 'n') tok->t++;
+            goto done;
+        }
+    }
+
+    // Decimal digits
+    while (tok->t < tok->max_t && (isdigit((unsigned char)*tok->t) || *tok->t == '_'))
+        tok->t++;
+
+    // Float: .digits
+    if (tok->t < tok->max_t && *tok->t == '.') {
+        tok->t++;
+        while (tok->t < tok->max_t && (isdigit((unsigned char)*tok->t) || *tok->t == '_'))
+            tok->t++;
+    }
+
+    // Exponent
+    if (tok->t < tok->max_t && (*tok->t == 'e' || *tok->t == 'E')) {
+        tok->t++;
+        if (tok->t < tok->max_t && (*tok->t == '+' || *tok->t == '-')) tok->t++;
+        while (tok->t < tok->max_t && (isdigit((unsigned char)*tok->t) || *tok->t == '_'))
+            tok->t++;
+    }
+
+    // BigInt suffix
+    if (tok->t < tok->max_t && *tok->t == 'n') tok->t++;
+
+done:
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+// Float starting with dot: .5, .123e4
+static Token js_parse_dot_number(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_NUMBER;
+
+    tok->t++; // skip '.'
+    while (tok->t < tok->max_t && (isdigit((unsigned char)*tok->t) || *tok->t == '_'))
+        tok->t++;
+    if (tok->t < tok->max_t && (*tok->t == 'e' || *tok->t == 'E')) {
+        tok->t++;
+        if (tok->t < tok->max_t && (*tok->t == '+' || *tok->t == '-')) tok->t++;
+        while (tok->t < tok->max_t && (isdigit((unsigned char)*tok->t) || *tok->t == '_'))
+            tok->t++;
+    }
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+// String literal with given quote character (" or ')
+static Token js_parse_string(Tokenizer *tok, char quote) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_STRING_LITERAL;
+
+    B32 escape = 0;
+    tok->t++; // skip opening quote
+    while (tok->t < tok->max_t && *tok->t != '\n') {
+        if (*tok->t == quote && !escape) { tok->t++; break; }
+        escape = !escape && (*tok->t == '\\');
+        tok->t++;
+    }
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+// / followed by / or * (comments), or /= (divide-assign), or bare / (divide)
+static Token js_parse_slash_or_comment(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+
+    tok->t++; // skip '/'
+    if (tok->t >= tok->max_t) {
+        token.type = TOK_OPERATION;
+        token.len = 1;
+        return token;
+    }
+
+    if (*tok->t == '/') {
+        // Line comment
+        token.type = TOK_COMMENT;
+        tok->t++;
+        while (tok->t < tok->max_t && *tok->t != '\n') tok->t++;
+    } else if (*tok->t == '*') {
+        // Block comment
+        token.type = TOK_MULTILINE_COMMENT;
+        tok->t++;
+        while (tok->t < tok->max_t) {
+            if (*tok->t == '*' && (tok->t + 1) < tok->max_t && *(tok->t + 1) == '/') {
+                tok->t += 2;
+                break;
+            }
+            tok->t++;
+        }
+    } else if (*tok->t == '=') {
+        // /=
+        token.type = TOK_OPERATION;
+        tok->t++;
+    } else {
+        // bare / (division)
+        token.type = TOK_OPERATION;
+    }
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+// Regex literal: /pattern/flags
+static Token js_parse_regex(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_STRING_LITERAL; // color regex like strings
+
+    B32 escape = 0;
+    B32 in_class = 0; // inside character class [...]
+    tok->t++; // skip opening /
+
+    while (tok->t < tok->max_t && *tok->t != '\n') {
+        if (escape) {
+            escape = 0;
+            tok->t++;
+            continue;
+        }
+        if (*tok->t == '\\') {
+            escape = 1;
+            tok->t++;
+            continue;
+        }
+        if (*tok->t == '[') { in_class = 1; tok->t++; continue; }
+        if (*tok->t == ']') { in_class = 0; tok->t++; continue; }
+        if (*tok->t == '/' && !in_class) {
+            tok->t++; // closing /
+            // Consume flags: d, g, i, m, s, u, v, y
+            while (tok->t < tok->max_t && isalpha((unsigned char)*tok->t)) tok->t++;
+            break;
+        }
+        tok->t++;
+    }
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+// Operators (handles multi-character sequences)
+static Token js_parse_operator(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_OPERATION;
+
+    char c = *tok->t;
+    tok->t++;
+
+    if (tok->t < tok->max_t) {
+        char n = *tok->t;
+
+        // Three-character (and four-character) operators
+        if ((tok->t + 1) < tok->max_t) {
+            char nn = *(tok->t + 1);
+            // >>>  and  >>>=
+            if (c == '>' && n == '>' && nn == '>') {
+                tok->t += 2;
+                if (tok->t < tok->max_t && *tok->t == '=') tok->t++;
+                goto done;
+            }
+            // ===
+            if (c == '=' && n == '=' && nn == '=') { tok->t += 2; goto done; }
+            // !==
+            if (c == '!' && n == '=' && nn == '=') { tok->t += 2; goto done; }
+            // **=
+            if (c == '*' && n == '*' && nn == '=') { tok->t += 2; goto done; }
+            // <<=
+            if (c == '<' && n == '<' && nn == '=') { tok->t += 2; goto done; }
+            // >>=
+            if (c == '>' && n == '>' && nn == '=') { tok->t += 2; goto done; }
+            // &&=
+            if (c == '&' && n == '&' && nn == '=') { tok->t += 2; goto done; }
+            // ||=
+            if (c == '|' && n == '|' && nn == '=') { tok->t += 2; goto done; }
+            // ??=
+            if (c == '?' && n == '?' && nn == '=') { tok->t += 2; goto done; }
+        }
+
+        // Two-character operators
+        if ((c == '=' && n == '=') || (c == '!' && n == '=') ||
+            (c == '<' && n == '=') || (c == '>' && n == '=') ||
+            (c == '+' && n == '=') || (c == '-' && n == '=') ||
+            (c == '*' && n == '=') || (c == '%' && n == '=') ||
+            (c == '&' && n == '=') || (c == '|' && n == '=') ||
+            (c == '^' && n == '=') || (c == '+' && n == '+') ||
+            (c == '-' && n == '-') || (c == '&' && n == '&') ||
+            (c == '|' && n == '|') || (c == '<' && n == '<') ||
+            (c == '>' && n == '>') || (c == '=' && n == '>') ||
+            (c == '*' && n == '*') || (c == '?' && n == '?') ||
+            (c == '?' && n == '.')) {
+            tok->t++;
+        }
+    }
+
+done:
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+////////////////////////////////
+// Regex vs division heuristic
+//
+// After identifiers, numbers, values, strings, ) and ] -- slash is division.
+// After keywords, operators, most punctuation, start of file -- slash is regex.
+
+static B32 js_slash_is_regex(Token prev, const char *data) {
+    switch (prev.type) {
+    case TOK_DEFAULT:     return 1; // start of file / no previous token
+    case TOK_KEYWORD:     return 1; // e.g. return /regex/
+    case TOK_DIRECTIVE:   return 1; // after import/export
+    case TOK_OPERATION:
+        // After ++ or --, it's division (x++ / y)
+        if (prev.len == 2) {
+            char c0 = data[prev.start];
+            char c1 = data[prev.start + 1];
+            if ((c0 == '+' && c1 == '+') || (c0 == '-' && c1 == '-'))
+                return 0;
+        }
+        return 1;
+    case TOK_PUNCTUATION:
+        // After ) or ], it's division
+        if (prev.len == 1) {
+            char c = data[prev.start];
+            if (c == ')' || c == ']') return 0;
+        }
+        return 1;
+    case TOK_IDENTIFIER:
+    case TOK_FUNCTION:
+    case TOK_NUMBER:
+    case TOK_STRING_LITERAL:
+    case TOK_CHAR_LITERAL:
+    case TOK_VALUE:
+        return 0; // division
+    default:
+        return 1;
+    }
+}
+
+////////////////////////////////
+// Template literal content scanner
+//
+// Scans the string content inside a template literal (the text between
+// backticks, or between a closing } and the next ${ or closing backtick).
+// Paints each byte as TOK_STRING_LITERAL.
+//
+// Returns 1 if we hit ${  (caller should enter expression mode),
+//         0 if we hit closing ` or EOF (template is done).
+
+static int js_scan_template_content(Tokenizer *tok, U8 *out_tokens) {
+    while (tok->t < tok->max_t) {
+        if (*tok->t == '`') {
+            // Closing backtick -- template done
+            S32 pos = (S32)(tok->t - tok->buf);
+            out_tokens[pos] = TOK_STRING_LITERAL;
+            tok->t++;
+            return 0;
+        }
+        if (*tok->t == '$' && (tok->t + 1) < tok->max_t && *(tok->t + 1) == '{') {
+            // Interpolation start -- paint ${ as punctuation
+            S32 pos = (S32)(tok->t - tok->buf);
+            out_tokens[pos]     = TOK_PUNCTUATION;
+            out_tokens[pos + 1] = TOK_PUNCTUATION;
+            tok->t += 2;
+            return 1;
+        }
+        if (*tok->t == '\\' && (tok->t + 1) < tok->max_t) {
+            // Escape sequence -- paint both chars as string
+            S32 pos = (S32)(tok->t - tok->buf);
+            out_tokens[pos]     = TOK_STRING_LITERAL;
+            out_tokens[pos + 1] = TOK_STRING_LITERAL;
+            tok->t += 2;
+            continue;
+        }
+        // Regular string character
+        S32 pos = (S32)(tok->t - tok->buf);
+        out_tokens[pos] = TOK_STRING_LITERAL;
+        tok->t++;
+    }
+    return 0; // EOF -- unclosed template
+}
+
+////////////////////////////////
+// Get next non-template token
+//
+// Called by the main loop for normal expression parsing.  Template backticks
+// and interpolation-closing braces are handled directly by the main loop
+// before this function is reached.
+
+static Token js_get_next_token(Tokenizer *tok, Token prev, const char *data) {
+    tokenizer_eat_whitespace(tok);
+
+    Token token = {0};
+    token.start = (S32)(tok->t - tok->buf);
+    token.type = TOK_DEFAULT;
+
+    if (tok->t >= tok->max_t) {
+        token.len = 0;
+        return token;
+    }
+
+    tok->start_t = tok->t;
+    char c = *tok->t;
+
+    if (js_is_ident_start(c)) {
+        return js_parse_identifier(tok);
+    }
+    if (isdigit((unsigned char)c)) {
+        return js_parse_number(tok);
+    }
+
+    switch (c) {
+    case '"':  return js_parse_string(tok, '"');
+    case '\'': return js_parse_string(tok, '\'');
+
+    case '/':
+        // Check for comment first (// or /*)
+        if ((tok->t + 1) < tok->max_t) {
+            char n = *(tok->t + 1);
+            if (n == '/' || n == '*')
+                return js_parse_slash_or_comment(tok);
+        }
+        // Regex or division based on context
+        if (js_slash_is_regex(prev, data))
+            return js_parse_regex(tok);
+        return js_parse_slash_or_comment(tok);
+
+    // Dot: float literal (.5), spread (...), or member access
+    case '.':
+        if ((tok->t + 1) < tok->max_t && isdigit((unsigned char)*(tok->t + 1))) {
+            return js_parse_dot_number(tok);
+        }
+        if ((tok->t + 2) < tok->max_t && *(tok->t + 1) == '.' && *(tok->t + 2) == '.') {
+            token.type = TOK_OPERATION;
+            tok->t += 3;
+            token.len = 3;
+            return token;
+        }
+        token.type = TOK_PUNCTUATION;
+        tok->t++;
+        token.len = 1;
+        return token;
+
+    // Punctuation
+    case ';': case ',':
+    case '(': case ')': case '[': case ']':
+    case '{': case '}':
+    case ':':
+        token.type = TOK_PUNCTUATION;
+        tok->t++;
+        token.len = 1;
+        return token;
+
+    // Operators
+    case '=': case '!': case '<': case '>':
+    case '+': case '-': case '*': case '%':
+    case '&': case '|': case '^': case '~':
+    case '?':
+        return js_parse_operator(tok);
+
+    // Private class fields: #name
+    case '#':
+        token.type = TOK_IDENTIFIER;
+        tok->t++;
+        while (tok->t < tok->max_t && js_is_ident_char(*tok->t)) tok->t++;
+        token.len = (S32)(tok->t - tok->start_t);
+        return token;
+
+    // Decorators: @name
+    case '@':
+        token.type = TOK_DIRECTIVE;
+        tok->t++;
+        while (tok->t < tok->max_t && js_is_ident_char(*tok->t)) tok->t++;
+        token.len = (S32)(tok->t - tok->start_t);
+        return token;
+
+    default:
+        token.type = TOK_INVALID;
+        tok->t++;
+        token.len = 1;
+        return token;
+    }
+}
+
+////////////////////////////////
+// tokenize_js -- main entry point
+//
+// Tokenizes the full buffer and paints out_tokens[] with token types.
+//
+// Template literal nesting is tracked with a depth stack.  Each level
+// records how many unmatched { braces exist in the current interpolation
+// expression.  When a } is encountered and the brace count is zero, it
+// closes the interpolation and we resume scanning template string content.
+//
+//   html`text ${obj.x} more ${css`inner ${y}`} end`
+//        |str  ||expr | str  ||    |str  ||  || str|
+//               ^punc  ^punc  ^punc      ^   ^^
+//               ${     }      ${         }   }` (nesting!)
+
+#define JS_MAX_TEMPLATE_DEPTH 32
+
+static void tokenize_js(const char *data, S32 length, U8 *out_tokens) {
+    memset(out_tokens, TOK_DEFAULT, length);
+
+    Tokenizer tok;
+    tokenizer_init(&tok, data, length);
+
+    S32 tmpl_depth = 0;
+    S32 brace_count[JS_MAX_TEMPLATE_DEPTH];
+    memset(brace_count, 0, sizeof(brace_count));
+
+    Token prev = {0};
+    prev.type = TOK_DEFAULT;
+
+    while (tok.t < tok.max_t) {
+        tokenizer_eat_whitespace(&tok);
+        if (tok.t >= tok.max_t) break;
+
+        char c = *tok.t;
+
+        // ---- Template literal: opening backtick ----
+        // This handles both top-level template literals and nested ones
+        // (e.g. a tagged template inside a ${...} interpolation).
+        if (c == '`') {
+            S32 pos = (S32)(tok.t - tok.buf);
+            out_tokens[pos] = TOK_STRING_LITERAL;
+            tok.t++;
+
+            int result = js_scan_template_content(&tok, out_tokens);
+            if (result == 1) {
+                // Hit ${  -- push template depth
+                if (tmpl_depth < JS_MAX_TEMPLATE_DEPTH) {
+                    brace_count[tmpl_depth] = 0;
+                    tmpl_depth++;
+                }
+            }
+            // result == 0: self-contained template (no interpolation, or
+            // all interpolations already resolved recursively)
+
+            prev.type = TOK_STRING_LITERAL;
+            prev.start = pos;
+            prev.len = (S32)(tok.t - tok.buf) - pos;
+            continue;
+        }
+
+        // ---- Closing brace that ends a template interpolation ----
+        // When we're inside a template expression and the brace count is
+        // zero, this } closes the ${...} and we resume string scanning.
+        if (c == '}' && tmpl_depth > 0 && brace_count[tmpl_depth - 1] == 0) {
+            S32 pos = (S32)(tok.t - tok.buf);
+            out_tokens[pos] = TOK_PUNCTUATION;
+            tok.t++;
+            tmpl_depth--;
+
+            // Resume template string content
+            int result = js_scan_template_content(&tok, out_tokens);
+            if (result == 1) {
+                // Hit another ${  -- re-enter expression mode
+                if (tmpl_depth < JS_MAX_TEMPLATE_DEPTH) {
+                    brace_count[tmpl_depth] = 0;
+                    tmpl_depth++;
+                }
+            }
+            // result == 0: template closed with backtick
+
+            prev.type = TOK_STRING_LITERAL;
+            prev.start = pos;
+            prev.len = (S32)(tok.t - tok.buf) - pos;
+            continue;
+        }
+
+        // ---- Normal token ----
+        tok.start_t = tok.t;
+        Token token = js_get_next_token(&tok, prev, data);
+        if (token.len == 0) break;
+
+        paint_token(out_tokens, token.start, token.len, token.type);
+
+        // Track brace depth for template interpolation
+        if (tmpl_depth > 0 && token.type == TOK_PUNCTUATION && token.len == 1) {
+            char tc = data[token.start];
+            if (tc == '{')      brace_count[tmpl_depth - 1]++;
+            else if (tc == '}') brace_count[tmpl_depth - 1]--;
+        }
+
+        // Retroactively mark identifier before '(' as function
+        if (token.type == TOK_PUNCTUATION && token.len == 1 &&
+            data[token.start] == '(' && prev.type == TOK_IDENTIFIER) {
+            paint_token(out_tokens, prev.start, prev.len, TOK_FUNCTION);
+        }
+
+        prev = token;
+    }
+}

c/lexer/lexer_lua.c

@@ -0,0 +1,422 @@
+// lexer_lua.c -- Lua language tokenizer
+//
+// Same pattern as lexer_go.c: a get_next_token() loop that advances a cursor
+// through the source, producing Token structs.  After each token we paint
+// the per-byte token-type array.  A second pass marks identifiers before '('
+// as functions.
+
+#include "lexer/lexer.h"
+#include <ctype.h>
+#include <string.h>
+
+////////////////////////////////
+// Lua keyword tables
+
+typedef struct LuaKeywordEntry {
+    const char *word;
+    Token_Type  type;
+} LuaKeywordEntry;
+
+static const LuaKeywordEntry lua_keywords[] = {
+    // Keywords
+    {"and",         TOK_KEYWORD},
+    {"break",       TOK_KEYWORD},
+    {"do",          TOK_KEYWORD},
+    {"else",        TOK_KEYWORD},
+    {"elseif",      TOK_KEYWORD},
+    {"end",         TOK_KEYWORD},
+    {"for",         TOK_KEYWORD},
+    {"function",    TOK_KEYWORD},
+    {"goto",        TOK_KEYWORD},
+    {"if",          TOK_KEYWORD},
+    {"in",          TOK_KEYWORD},
+    {"local",       TOK_KEYWORD},
+    {"not",         TOK_KEYWORD},
+    {"or",          TOK_KEYWORD},
+    {"repeat",      TOK_KEYWORD},
+    {"return",      TOK_KEYWORD},
+    {"then",        TOK_KEYWORD},
+    {"until",       TOK_KEYWORD},
+    {"while",       TOK_KEYWORD},
+
+    // Values
+    {"true",        TOK_VALUE},
+    {"false",       TOK_VALUE},
+    {"nil",         TOK_VALUE},
+
+    // Built-in globals / types (use TOK_TYPE for distinct coloring)
+    {"self",        TOK_TYPE},
+
+    // Built-in functions (TOK_MODIFIER for distinct coloring)
+    {"assert",      TOK_MODIFIER},
+    {"collectgarbage", TOK_MODIFIER},
+    {"dofile",      TOK_MODIFIER},
+    {"error",       TOK_MODIFIER},
+    {"getmetatable", TOK_MODIFIER},
+    {"ipairs",      TOK_MODIFIER},
+    {"load",        TOK_MODIFIER},
+    {"loadfile",    TOK_MODIFIER},
+    {"next",        TOK_MODIFIER},
+    {"pairs",       TOK_MODIFIER},
+    {"pcall",       TOK_MODIFIER},
+    {"print",       TOK_MODIFIER},
+    {"rawequal",    TOK_MODIFIER},
+    {"rawget",      TOK_MODIFIER},
+    {"rawlen",      TOK_MODIFIER},
+    {"rawset",      TOK_MODIFIER},
+    {"require",     TOK_MODIFIER},
+    {"select",      TOK_MODIFIER},
+    {"setmetatable", TOK_MODIFIER},
+    {"tonumber",    TOK_MODIFIER},
+    {"tostring",    TOK_MODIFIER},
+    {"type",        TOK_MODIFIER},
+    {"unpack",      TOK_MODIFIER},
+    {"xpcall",      TOK_MODIFIER},
+};
+
+#define LUA_KEYWORD_COUNT (S32)(sizeof(lua_keywords) / sizeof(lua_keywords[0]))
+
+static Token_Type lua_lookup_keyword(const char *word, S32 len) {
+    for (S32 i = 0; i < LUA_KEYWORD_COUNT; i++) {
+        const char *kw = lua_keywords[i].word;
+        S32 kwlen = (S32)strlen(kw);
+        if (kwlen == len && memcmp(kw, word, len) == 0)
+            return lua_keywords[i].type;
+    }
+    return TOK_IDENTIFIER;
+}
+
+////////////////////////////////
+// Character helpers
+
+static B32 lua_is_ident_start(char c) {
+    return isalpha((unsigned char)c) || c == '_';
+}
+
+static B32 lua_is_ident_char(char c) {
+    return isalnum((unsigned char)c) || c == '_';
+}
+
+static B32 lua_is_hex(char c) {
+    return isdigit((unsigned char)c) ||
+           (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
+}
+
+////////////////////////////////
+// Long bracket level detection
+// Returns the level (number of '=' signs) if we're at a long bracket opening
+// like [[ or [==[ etc. Returns -1 if not a long bracket.
+
+static S32 lua_long_bracket_level(const char *p, const char *max_p) {
+    if (p >= max_p || *p != '[') return -1;
+    p++;
+    S32 level = 0;
+    while (p < max_p && *p == '=') { level++; p++; }
+    if (p < max_p && *p == '[') return level;
+    return -1;
+}
+
+// Scan past the closing long bracket of the given level.
+// Cursor should be right after the opening [=*[.
+static void lua_scan_long_bracket_close(Tokenizer *tok, S32 level) {
+    while (tok->t < tok->max_t) {
+        if (*tok->t == ']') {
+            const char *p = tok->t + 1;
+            S32 count = 0;
+            while (p < tok->max_t && *p == '=' && count < level) { count++; p++; }
+            if (count == level && p < tok->max_t && *p == ']') {
+                tok->t = p + 1;
+                return;
+            }
+        }
+        tok->t++;
+    }
+}
+
+////////////////////////////////
+// Individual token parsers
+
+static Token lua_parse_identifier(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    const char *begin = tok->t;
+    while (tok->t < tok->max_t && lua_is_ident_char(*tok->t))
+        tok->t++;
+    S32 len = (S32)(tok->t - begin);
+    token.type = lua_lookup_keyword(begin, len);
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+static Token lua_parse_number(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_NUMBER;
+
+    char c = *tok->t;
+    tok->t++;
+
+    if (c == '0' && tok->t < tok->max_t && (*tok->t == 'x' || *tok->t == 'X')) {
+        // Hex literal
+        tok->t++;
+        while (tok->t < tok->max_t && lua_is_hex(*tok->t)) tok->t++;
+        // Hex float
+        if (tok->t < tok->max_t && *tok->t == '.') {
+            tok->t++;
+            while (tok->t < tok->max_t && lua_is_hex(*tok->t)) tok->t++;
+        }
+        // Hex exponent (p/P)
+        if (tok->t < tok->max_t && (*tok->t == 'p' || *tok->t == 'P')) {
+            tok->t++;
+            if (tok->t < tok->max_t && (*tok->t == '+' || *tok->t == '-')) tok->t++;
+            while (tok->t < tok->max_t && isdigit((unsigned char)*tok->t)) tok->t++;
+        }
+    } else {
+        // Decimal
+        while (tok->t < tok->max_t && isdigit((unsigned char)*tok->t)) tok->t++;
+        // Float
+        if (tok->t < tok->max_t && *tok->t == '.') {
+            if ((tok->t + 1) < tok->max_t && isdigit((unsigned char)*(tok->t + 1))) {
+                tok->t++;
+                while (tok->t < tok->max_t && isdigit((unsigned char)*tok->t)) tok->t++;
+            } else if ((tok->t + 1) >= tok->max_t || !lua_is_ident_start(*(tok->t + 1))) {
+                tok->t++;
+            }
+        }
+        // Exponent
+        if (tok->t < tok->max_t && (*tok->t == 'e' || *tok->t == 'E')) {
+            tok->t++;
+            if (tok->t < tok->max_t && (*tok->t == '+' || *tok->t == '-')) tok->t++;
+            while (tok->t < tok->max_t && isdigit((unsigned char)*tok->t)) tok->t++;
+        }
+    }
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+static Token lua_parse_dot_number(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_NUMBER;
+
+    tok->t++; // skip '.'
+    while (tok->t < tok->max_t && isdigit((unsigned char)*tok->t)) tok->t++;
+    if (tok->t < tok->max_t && (*tok->t == 'e' || *tok->t == 'E')) {
+        tok->t++;
+        if (tok->t < tok->max_t && (*tok->t == '+' || *tok->t == '-')) tok->t++;
+        while (tok->t < tok->max_t && isdigit((unsigned char)*tok->t)) tok->t++;
+    }
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+static Token lua_parse_string(Tokenizer *tok, char quote) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_STRING_LITERAL;
+
+    B32 escape = 0;
+    tok->t++; // skip opening quote
+    while (tok->t < tok->max_t && *tok->t != '\n') {
+        if (*tok->t == quote && !escape) { tok->t++; break; }
+        escape = !escape && (*tok->t == '\\');
+        tok->t++;
+    }
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+static Token lua_parse_long_string(Tokenizer *tok, S32 level) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_STRING_LITERAL;
+
+    // Skip past opening [=*[
+    tok->t++; // first [
+    tok->t += level; // = signs
+    tok->t++; // second [
+
+    lua_scan_long_bracket_close(tok, level);
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+static Token lua_parse_comment(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+
+    tok->t += 2; // skip '--'
+
+    // Check for long comment --[=*[
+    S32 level = lua_long_bracket_level(tok->t, tok->max_t);
+    if (level >= 0) {
+        token.type = TOK_MULTILINE_COMMENT;
+        tok->t++; // first [
+        tok->t += level; // = signs
+        tok->t++; // second [
+        lua_scan_long_bracket_close(tok, level);
+    } else {
+        // Single-line comment
+        token.type = TOK_COMMENT;
+        while (tok->t < tok->max_t && *tok->t != '\n') tok->t++;
+    }
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+static Token lua_parse_operator(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_OPERATION;
+
+    char c = *tok->t;
+    tok->t++;
+
+    if (tok->t < tok->max_t) {
+        char n = *tok->t;
+        // Two-character operators
+        if ((c == '=' && n == '=') || (c == '~' && n == '=') ||
+            (c == '<' && n == '=') || (c == '>' && n == '=') ||
+            (c == '.' && n == '.') || (c == '<' && n == '<') ||
+            (c == '>' && n == '>') || (c == '/' && n == '/')) {
+            tok->t++;
+            // Three-character: ..  can be followed by . to make ...
+            if (c == '.' && n == '.' && tok->t < tok->max_t && *tok->t == '.') {
+                tok->t++;
+            }
+        }
+    }
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+////////////////////////////////
+// Main get_next_token
+
+static Token lua_get_next_token(Tokenizer *tok) {
+    tokenizer_eat_whitespace(tok);
+
+    Token token = {0};
+    token.start = (S32)(tok->t - tok->buf);
+    token.type = TOK_DEFAULT;
+
+    if (tok->t >= tok->max_t) {
+        token.len = 0;
+        return token;
+    }
+
+    tok->start_t = tok->t;
+    char c = *tok->t;
+
+    if (lua_is_ident_start(c)) {
+        return lua_parse_identifier(tok);
+    }
+    if (isdigit((unsigned char)c)) {
+        return lua_parse_number(tok);
+    }
+
+    switch (c) {
+    case '\'':
+    case '"':
+        return lua_parse_string(tok, c);
+
+    case '[': {
+        // Check for long string [=*[
+        S32 level = lua_long_bracket_level(tok->t, tok->max_t);
+        if (level >= 0) {
+            return lua_parse_long_string(tok, level);
+        }
+        // Plain bracket punctuation
+        token.type = TOK_PUNCTUATION;
+        tok->t++;
+        token.len = 1;
+        return token;
+    }
+
+    case '-':
+        // Check for comment --
+        if ((tok->t + 1) < tok->max_t && *(tok->t + 1) == '-') {
+            return lua_parse_comment(tok);
+        }
+        // Minus operator
+        token.type = TOK_OPERATION;
+        tok->t++;
+        token.len = 1;
+        return token;
+
+    case '.':
+        // .digits = float literal
+        if ((tok->t + 1) < tok->max_t && isdigit((unsigned char)*(tok->t + 1))) {
+            return lua_parse_dot_number(tok);
+        }
+        // .. or ... or just .
+        return lua_parse_operator(tok);
+
+    // Punctuation
+    case ';': case ',': case ':':
+    case '{': case '}': case '(': case ')': case ']':
+        token.type = TOK_PUNCTUATION;
+        tok->t++;
+        token.len = 1;
+        return token;
+
+    // Directive: shebang or labels (::label::)
+    case '#':
+        // Shebang line or length operator
+        if (tok->t == tok->buf && (tok->t + 1) < tok->max_t && *(tok->t + 1) == '!') {
+            token.type = TOK_DIRECTIVE;
+            while (tok->t < tok->max_t && *tok->t != '\n') tok->t++;
+            token.len = (S32)(tok->t - tok->start_t);
+            return token;
+        }
+        token.type = TOK_OPERATION;
+        tok->t++;
+        token.len = 1;
+        return token;
+
+    // Operators
+    case '=': case '~': case '<': case '>':
+    case '+': case '*': case '/': case '%':
+    case '^': case '&': case '|':
+        return lua_parse_operator(tok);
+
+    default:
+        token.type = TOK_INVALID;
+        tok->t++;
+        token.len = 1;
+        return token;
+    }
+}
+
+////////////////////////////////
+// tokenize_lua -- main entry point
+
+static void tokenize_lua(const char *data, S32 length, U8 *out_tokens) {
+    memset(out_tokens, TOK_DEFAULT, length);
+
+    Tokenizer tok;
+    tokenizer_init(&tok, data, length);
+
+    Token prev = {0};
+    prev.type = TOK_DEFAULT;
+
+    while (tok.t < tok.max_t) {
+        Token token = lua_get_next_token(&tok);
+        if (token.len == 0) break;
+
+        paint_token(out_tokens, token.start, token.len, token.type);
+
+        // Retroactively mark identifier before '(' as a function
+        if (token.type == TOK_PUNCTUATION && token.len == 1 &&
+            data[token.start] == '(' && prev.type == TOK_IDENTIFIER) {
+            paint_token(out_tokens, prev.start, prev.len, TOK_FUNCTION);
+        }
+
+        prev = token;
+    }
+}

c/lexer/lexer_sql.c

@@ -0,0 +1,645 @@
+// lexer_sql.c -- SQL language tokenizer
+//
+// Same pattern as lexer_go.c: a get_next_token() loop that advances a cursor
+// through the source, producing Token structs.  After each token we paint
+// the per-byte token-type array.  A second pass marks identifiers before '('
+// as functions.
+//
+// SQL keywords are case-insensitive, so comparisons use a case-insensitive
+// match.  Covers standard SQL plus common extensions (MySQL, PostgreSQL, etc.).
+
+#include "lexer/lexer.h"
+#include <ctype.h>
+#include <string.h>
+
+////////////////////////////////
+// SQL keyword tables
+
+typedef struct SQLKeywordEntry {
+    const char *word;
+    Token_Type  type;
+} SQLKeywordEntry;
+
+static const SQLKeywordEntry sql_keywords[] = {
+    // DML / DQL keywords
+    {"SELECT",      TOK_KEYWORD},
+    {"FROM",        TOK_KEYWORD},
+    {"WHERE",       TOK_KEYWORD},
+    {"INSERT",      TOK_KEYWORD},
+    {"INTO",        TOK_KEYWORD},
+    {"UPDATE",      TOK_KEYWORD},
+    {"DELETE",      TOK_KEYWORD},
+    {"SET",         TOK_KEYWORD},
+    {"VALUES",      TOK_KEYWORD},
+    {"AS",          TOK_KEYWORD},
+    {"ON",          TOK_KEYWORD},
+    {"JOIN",        TOK_KEYWORD},
+    {"INNER",       TOK_KEYWORD},
+    {"LEFT",        TOK_KEYWORD},
+    {"RIGHT",       TOK_KEYWORD},
+    {"OUTER",       TOK_KEYWORD},
+    {"FULL",        TOK_KEYWORD},
+    {"CROSS",       TOK_KEYWORD},
+    {"NATURAL",     TOK_KEYWORD},
+    {"USING",       TOK_KEYWORD},
+    {"ORDER",       TOK_KEYWORD},
+    {"BY",          TOK_KEYWORD},
+    {"GROUP",       TOK_KEYWORD},
+    {"HAVING",      TOK_KEYWORD},
+    {"LIMIT",       TOK_KEYWORD},
+    {"OFFSET",      TOK_KEYWORD},
+    {"UNION",       TOK_KEYWORD},
+    {"ALL",         TOK_KEYWORD},
+    {"DISTINCT",    TOK_KEYWORD},
+    {"TOP",         TOK_KEYWORD},
+    {"FETCH",       TOK_KEYWORD},
+    {"NEXT",        TOK_KEYWORD},
+    {"ROWS",        TOK_KEYWORD},
+    {"ONLY",        TOK_KEYWORD},
+    {"FIRST",       TOK_KEYWORD},
+    {"LAST",        TOK_KEYWORD},
+
+    // DDL keywords
+    {"CREATE",      TOK_KEYWORD},
+    {"ALTER",       TOK_KEYWORD},
+    {"DROP",        TOK_KEYWORD},
+    {"TABLE",       TOK_KEYWORD},
+    {"VIEW",        TOK_KEYWORD},
+    {"INDEX",       TOK_KEYWORD},
+    {"DATABASE",    TOK_KEYWORD},
+    {"SCHEMA",      TOK_KEYWORD},
+    {"COLUMN",      TOK_KEYWORD},
+    {"ADD",         TOK_KEYWORD},
+    {"RENAME",      TOK_KEYWORD},
+    {"TRUNCATE",    TOK_KEYWORD},
+    {"REPLACE",     TOK_KEYWORD},
+    {"TEMPORARY",   TOK_KEYWORD},
+    {"TEMP",        TOK_KEYWORD},
+    {"IF",          TOK_KEYWORD},
+    {"EXISTS",      TOK_KEYWORD},
+    {"CASCADE",     TOK_KEYWORD},
+    {"RESTRICT",    TOK_KEYWORD},
+
+    // Constraints & keys
+    {"PRIMARY",     TOK_KEYWORD},
+    {"KEY",         TOK_KEYWORD},
+    {"FOREIGN",     TOK_KEYWORD},
+    {"REFERENCES",  TOK_KEYWORD},
+    {"UNIQUE",      TOK_KEYWORD},
+    {"CHECK",       TOK_KEYWORD},
+    {"CONSTRAINT",  TOK_KEYWORD},
+    {"DEFAULT",     TOK_KEYWORD},
+    {"AUTOINCREMENT", TOK_KEYWORD},
+    {"AUTO_INCREMENT", TOK_KEYWORD},
+    {"IDENTITY",    TOK_KEYWORD},
+
+    // Control flow / procedural
+    {"BEGIN",       TOK_KEYWORD},
+    {"END",         TOK_KEYWORD},
+    {"COMMIT",      TOK_KEYWORD},
+    {"ROLLBACK",    TOK_KEYWORD},
+    {"SAVEPOINT",   TOK_KEYWORD},
+    {"TRANSACTION", TOK_KEYWORD},
+    {"RETURN",      TOK_KEYWORD},
+    {"RETURNS",     TOK_KEYWORD},
+    {"DECLARE",     TOK_KEYWORD},
+    {"CURSOR",      TOK_KEYWORD},
+    {"OPEN",        TOK_KEYWORD},
+    {"CLOSE",       TOK_KEYWORD},
+    {"DEALLOCATE",  TOK_KEYWORD},
+    {"EXEC",        TOK_KEYWORD},
+    {"EXECUTE",     TOK_KEYWORD},
+    {"CALL",        TOK_KEYWORD},
+    {"PROCEDURE",   TOK_KEYWORD},
+    {"FUNCTION",    TOK_KEYWORD},
+    {"TRIGGER",     TOK_KEYWORD},
+    {"CASE",        TOK_KEYWORD},
+    {"WHEN",        TOK_KEYWORD},
+    {"THEN",        TOK_KEYWORD},
+    {"ELSE",        TOK_KEYWORD},
+    {"WHILE",       TOK_KEYWORD},
+    {"LOOP",        TOK_KEYWORD},
+    {"FOR",         TOK_KEYWORD},
+    {"EACH",        TOK_KEYWORD},
+    {"ROW",         TOK_KEYWORD},
+    {"AFTER",       TOK_KEYWORD},
+    {"BEFORE",      TOK_KEYWORD},
+    {"INSTEAD",     TOK_KEYWORD},
+    {"OF",          TOK_KEYWORD},
+
+    // Logical operators (keywords)
+    {"AND",         TOK_KEYWORD},
+    {"OR",          TOK_KEYWORD},
+    {"NOT",         TOK_KEYWORD},
+    {"IN",          TOK_KEYWORD},
+    {"BETWEEN",     TOK_KEYWORD},
+    {"LIKE",        TOK_KEYWORD},
+    {"ILIKE",       TOK_KEYWORD},
+    {"IS",          TOK_KEYWORD},
+    {"ANY",         TOK_KEYWORD},
+    {"SOME",        TOK_KEYWORD},
+    {"EXCEPT",      TOK_KEYWORD},
+    {"INTERSECT",   TOK_KEYWORD},
+    {"WITH",        TOK_KEYWORD},
+    {"RECURSIVE",   TOK_KEYWORD},
+    {"OVER",        TOK_KEYWORD},
+    {"PARTITION",   TOK_KEYWORD},
+    {"WINDOW",      TOK_KEYWORD},
+    {"LATERAL",     TOK_KEYWORD},
+
+    // Misc
+    {"GRANT",       TOK_KEYWORD},
+    {"REVOKE",      TOK_KEYWORD},
+    {"EXPLAIN",     TOK_KEYWORD},
+    {"ANALYZE",     TOK_KEYWORD},
+    {"VACUUM",      TOK_KEYWORD},
+    {"PRAGMA",      TOK_KEYWORD},
+    {"DESCRIBE",    TOK_KEYWORD},
+    {"SHOW",        TOK_KEYWORD},
+    {"USE",         TOK_KEYWORD},
+    {"COPY",        TOK_KEYWORD},
+    {"PERFORM",     TOK_KEYWORD},
+    {"RAISE",       TOK_KEYWORD},
+
+    // Modifiers
+    {"ASC",         TOK_MODIFIER},
+    {"DESC",        TOK_MODIFIER},
+    {"NULLS",       TOK_MODIFIER},
+    {"NOT",         TOK_MODIFIER},
+
+    // Data types
+    {"INT",         TOK_TYPE},
+    {"INTEGER",     TOK_TYPE},
+    {"SMALLINT",    TOK_TYPE},
+    {"BIGINT",      TOK_TYPE},
+    {"TINYINT",     TOK_TYPE},
+    {"MEDIUMINT",   TOK_TYPE},
+    {"SERIAL",      TOK_TYPE},
+    {"BIGSERIAL",   TOK_TYPE},
+    {"FLOAT",       TOK_TYPE},
+    {"REAL",        TOK_TYPE},
+    {"DOUBLE",      TOK_TYPE},
+    {"DECIMAL",     TOK_TYPE},
+    {"NUMERIC",     TOK_TYPE},
+    {"PRECISION",   TOK_TYPE},
+    {"CHAR",        TOK_TYPE},
+    {"VARCHAR",     TOK_TYPE},
+    {"TEXT",        TOK_TYPE},
+    {"NCHAR",       TOK_TYPE},
+    {"NVARCHAR",    TOK_TYPE},
+    {"NTEXT",       TOK_TYPE},
+    {"BLOB",        TOK_TYPE},
+    {"CLOB",        TOK_TYPE},
+    {"BYTEA",       TOK_TYPE},
+    {"BOOLEAN",     TOK_TYPE},
+    {"BOOL",        TOK_TYPE},
+    {"DATE",        TOK_TYPE},
+    {"TIME",        TOK_TYPE},
+    {"DATETIME",    TOK_TYPE},
+    {"TIMESTAMP",   TOK_TYPE},
+    {"TIMESTAMPTZ", TOK_TYPE},
+    {"INTERVAL",    TOK_TYPE},
+    {"UUID",        TOK_TYPE},
+    {"JSON",        TOK_TYPE},
+    {"JSONB",       TOK_TYPE},
+    {"XML",         TOK_TYPE},
+    {"ARRAY",       TOK_TYPE},
+    {"ENUM",        TOK_TYPE},
+    {"MONEY",       TOK_TYPE},
+    {"BIT",         TOK_TYPE},
+    {"VARBIT",      TOK_TYPE},
+    {"INET",        TOK_TYPE},
+    {"CIDR",        TOK_TYPE},
+    {"MACADDR",     TOK_TYPE},
+    {"POINT",       TOK_TYPE},
+    {"LINE",        TOK_TYPE},
+    {"POLYGON",     TOK_TYPE},
+    {"GEOMETRY",    TOK_TYPE},
+    {"GEOGRAPHY",   TOK_TYPE},
+
+    // Values
+    {"NULL",        TOK_VALUE},
+    {"TRUE",        TOK_VALUE},
+    {"FALSE",       TOK_VALUE},
+    {"CURRENT_DATE",     TOK_VALUE},
+    {"CURRENT_TIME",     TOK_VALUE},
+    {"CURRENT_TIMESTAMP", TOK_VALUE},
+    {"CURRENT_USER",     TOK_VALUE},
+
+    // Built-in aggregate / window / common functions (TOK_MODIFIER)
+    {"COUNT",       TOK_MODIFIER},
+    {"SUM",         TOK_MODIFIER},
+    {"AVG",         TOK_MODIFIER},
+    {"MIN",         TOK_MODIFIER},
+    {"MAX",         TOK_MODIFIER},
+    {"COALESCE",    TOK_MODIFIER},
+    {"NULLIF",      TOK_MODIFIER},
+    {"CAST",        TOK_MODIFIER},
+    {"CONVERT",     TOK_MODIFIER},
+    {"IFNULL",      TOK_MODIFIER},
+    {"ISNULL",      TOK_MODIFIER},
+    {"NVL",         TOK_MODIFIER},
+    {"ROW_NUMBER",  TOK_MODIFIER},
+    {"RANK",        TOK_MODIFIER},
+    {"DENSE_RANK",  TOK_MODIFIER},
+    {"NTILE",       TOK_MODIFIER},
+    {"LAG",         TOK_MODIFIER},
+    {"LEAD",        TOK_MODIFIER},
+    {"FIRST_VALUE", TOK_MODIFIER},
+    {"LAST_VALUE",  TOK_MODIFIER},
+    {"SUBSTR",      TOK_MODIFIER},
+    {"SUBSTRING",   TOK_MODIFIER},
+    {"TRIM",        TOK_MODIFIER},
+    {"UPPER",       TOK_MODIFIER},
+    {"LOWER",       TOK_MODIFIER},
+    {"LENGTH",      TOK_MODIFIER},
+    {"CONCAT",      TOK_MODIFIER},
+    {"REPLACE",     TOK_MODIFIER},
+    {"ABS",         TOK_MODIFIER},
+    {"ROUND",       TOK_MODIFIER},
+    {"CEIL",        TOK_MODIFIER},
+    {"FLOOR",       TOK_MODIFIER},
+    {"NOW",         TOK_MODIFIER},
+    {"EXTRACT",     TOK_MODIFIER},
+    {"STRING_AGG",  TOK_MODIFIER},
+    {"GROUP_CONCAT", TOK_MODIFIER},
+    {"ARRAY_AGG",   TOK_MODIFIER},
+    {"GREATEST",    TOK_MODIFIER},
+    {"LEAST",       TOK_MODIFIER},
+};
+
+#define SQL_KEYWORD_COUNT (S32)(sizeof(sql_keywords) / sizeof(sql_keywords[0]))
+
+// Case-insensitive keyword lookup
+static Token_Type sql_lookup_keyword(const char *word, S32 len) {
+    for (S32 i = 0; i < SQL_KEYWORD_COUNT; i++) {
+        const char *kw = sql_keywords[i].word;
+        S32 kwlen = (S32)strlen(kw);
+        if (kwlen != len) continue;
+        B32 match = 1;
+        for (S32 j = 0; j < len; j++) {
+            if (toupper((unsigned char)word[j]) != (unsigned char)kw[j]) {
+                match = 0;
+                break;
+            }
+        }
+        if (match) return sql_keywords[i].type;
+    }
+    return TOK_IDENTIFIER;
+}
+
+////////////////////////////////
+// Character helpers
+
+static B32 sql_is_ident_start(char c) {
+    return isalpha((unsigned char)c) || c == '_';
+}
+
+static B32 sql_is_ident_char(char c) {
+    return isalnum((unsigned char)c) || c == '_';
+}
+
+////////////////////////////////
+// Individual token parsers
+
+static Token sql_parse_identifier(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    const char *begin = tok->t;
+    while (tok->t < tok->max_t && sql_is_ident_char(*tok->t))
+        tok->t++;
+    S32 len = (S32)(tok->t - begin);
+    token.type = sql_lookup_keyword(begin, len);
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+static Token sql_parse_number(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_NUMBER;
+
+    while (tok->t < tok->max_t && isdigit((unsigned char)*tok->t))
+        tok->t++;
+
+    // Decimal part
+    if (tok->t < tok->max_t && *tok->t == '.') {
+        tok->t++;
+        while (tok->t < tok->max_t && isdigit((unsigned char)*tok->t))
+            tok->t++;
+    }
+
+    // Exponent
+    if (tok->t < tok->max_t && (*tok->t == 'e' || *tok->t == 'E')) {
+        tok->t++;
+        if (tok->t < tok->max_t && (*tok->t == '+' || *tok->t == '-')) tok->t++;
+        while (tok->t < tok->max_t && isdigit((unsigned char)*tok->t)) tok->t++;
+    }
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+static Token sql_parse_dot_number(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_NUMBER;
+
+    tok->t++; // skip '.'
+    while (tok->t < tok->max_t && isdigit((unsigned char)*tok->t)) tok->t++;
+    if (tok->t < tok->max_t && (*tok->t == 'e' || *tok->t == 'E')) {
+        tok->t++;
+        if (tok->t < tok->max_t && (*tok->t == '+' || *tok->t == '-')) tok->t++;
+        while (tok->t < tok->max_t && isdigit((unsigned char)*tok->t)) tok->t++;
+    }
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+// Single-quoted string: 'text', with '' as escape for embedded quote
+static Token sql_parse_string(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_STRING_LITERAL;
+
+    tok->t++; // skip opening '
+    while (tok->t < tok->max_t) {
+        if (*tok->t == '\'') {
+            tok->t++;
+            // '' is an escaped quote inside a string
+            if (tok->t < tok->max_t && *tok->t == '\'') {
+                tok->t++;
+                continue;
+            }
+            break;
+        }
+        tok->t++;
+    }
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+// Double-quoted identifier: "column_name"
+static Token sql_parse_quoted_identifier(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_IDENTIFIER;
+
+    tok->t++; // skip opening "
+    while (tok->t < tok->max_t) {
+        if (*tok->t == '"') {
+            tok->t++;
+            // "" is an escaped quote inside a quoted identifier
+            if (tok->t < tok->max_t && *tok->t == '"') {
+                tok->t++;
+                continue;
+            }
+            break;
+        }
+        tok->t++;
+    }
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+// Backtick-quoted identifier (MySQL): `column_name`
+static Token sql_parse_backtick_identifier(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_IDENTIFIER;
+
+    tok->t++; // skip opening `
+    while (tok->t < tok->max_t) {
+        if (*tok->t == '`') { tok->t++; break; }
+        tok->t++;
+    }
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+// Line comment: -- ...
+static Token sql_parse_line_comment(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_COMMENT;
+
+    tok->t += 2; // skip '--'
+    while (tok->t < tok->max_t && *tok->t != '\n') tok->t++;
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+// Block comment: /* ... */
+static Token sql_parse_block_comment(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_MULTILINE_COMMENT;
+
+    tok->t += 2; // skip '/*'
+    while (tok->t < tok->max_t) {
+        if (*tok->t == '*' && (tok->t + 1) < tok->max_t && *(tok->t + 1) == '/') {
+            tok->t += 2;
+            break;
+        }
+        tok->t++;
+    }
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+// MySQL # comment
+static Token sql_parse_hash_comment(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_COMMENT;
+
+    tok->t++; // skip '#'
+    while (tok->t < tok->max_t && *tok->t != '\n') tok->t++;
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+// Variable / parameter: @var, @@var, :param, $1
+static Token sql_parse_variable(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_DIRECTIVE;
+
+    char c = *tok->t;
+    tok->t++;
+
+    if (c == '@') {
+        // @@ for system variables
+        if (tok->t < tok->max_t && *tok->t == '@') tok->t++;
+        while (tok->t < tok->max_t && sql_is_ident_char(*tok->t)) tok->t++;
+    } else if (c == ':') {
+        while (tok->t < tok->max_t && sql_is_ident_char(*tok->t)) tok->t++;
+    } else if (c == '$') {
+        // $1, $2, ... (PostgreSQL positional params)
+        while (tok->t < tok->max_t && isdigit((unsigned char)*tok->t)) tok->t++;
+        // Also handle $tag$ dollar-quoted strings if no digits follow
+        if (tok->t == tok->start_t + 1) {
+            // Just a lone $, treat as punctuation
+            token.type = TOK_PUNCTUATION;
+        }
+    }
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+static Token sql_parse_operator(Tokenizer *tok) {
+    Token token;
+    token.start = (S32)(tok->start_t - tok->buf);
+    token.type = TOK_OPERATION;
+
+    char c = *tok->t;
+    tok->t++;
+
+    if (tok->t < tok->max_t) {
+        char n = *tok->t;
+        // Two-character operators
+        if ((c == '<' && n == '=') || (c == '>' && n == '=') ||
+            (c == '<' && n == '>') || (c == '!' && n == '=') ||
+            (c == '|' && n == '|') || (c == ':' && n == ':')) {
+            tok->t++;
+        }
+    }
+
+    token.len = (S32)(tok->t - tok->start_t);
+    return token;
+}
+
+////////////////////////////////
+// Main get_next_token
+
+static Token sql_get_next_token(Tokenizer *tok) {
+    tokenizer_eat_whitespace(tok);
+
+    Token token = {0};
+    token.start = (S32)(tok->t - tok->buf);
+    token.type = TOK_DEFAULT;
+
+    if (tok->t >= tok->max_t) {
+        token.len = 0;
+        return token;
+    }
+
+    tok->start_t = tok->t;
+    char c = *tok->t;
+
+    if (sql_is_ident_start(c)) {
+        return sql_parse_identifier(tok);
+    }
+    if (isdigit((unsigned char)c)) {
+        return sql_parse_number(tok);
+    }
+
+    switch (c) {
+    case '\'':
+        return sql_parse_string(tok);
+
+    case '"':
+        return sql_parse_quoted_identifier(tok);
+
+    case '`':
+        return sql_parse_backtick_identifier(tok);
+
+    case '-':
+        if ((tok->t + 1) < tok->max_t && *(tok->t + 1) == '-') {
+            return sql_parse_line_comment(tok);
+        }
+        token.type = TOK_OPERATION;
+        tok->t++;
+        token.len = 1;
+        return token;
+
+    case '/':
+        if ((tok->t + 1) < tok->max_t && *(tok->t + 1) == '*') {
+            return sql_parse_block_comment(tok);
+        }
+        token.type = TOK_OPERATION;
+        tok->t++;
+        token.len = 1;
+        return token;
+
+    case '#':
+        return sql_parse_hash_comment(tok);
+
+    case '.':
+        if ((tok->t + 1) < tok->max_t && isdigit((unsigned char)*(tok->t + 1))) {
+            return sql_parse_dot_number(tok);
+        }
+        token.type = TOK_PUNCTUATION;
+        tok->t++;
+        token.len = 1;
+        return token;
+
+    case '@': case '$':
+        return sql_parse_variable(tok);
+
+    case ':':
+        // :param or :: cast operator
+        if ((tok->t + 1) < tok->max_t) {
+            char n = *(tok->t + 1);
+            if (n == ':') return sql_parse_operator(tok);
+            if (sql_is_ident_start(n)) return sql_parse_variable(tok);
+        }
+        token.type = TOK_PUNCTUATION;
+        tok->t++;
+        token.len = 1;
+        return token;
+
+    // Punctuation
+    case ';': case ',':
+    case '{': case '}': case '(': case ')': case '[': case ']':
+        token.type = TOK_PUNCTUATION;
+        tok->t++;
+        token.len = 1;
+        return token;
+
+    // Operators
+    case '=': case '<': case '>': case '!':
+    case '+': case '*': case '%': case '&':
+    case '|': case '^': case '~':
+        return sql_parse_operator(tok);
+
+    default:
+        token.type = TOK_INVALID;
+        tok->t++;
+        token.len = 1;
+        return token;
+    }
+}
+
+////////////////////////////////
+// tokenize_sql -- main entry point
+
+static void tokenize_sql(const char *data, S32 length, U8 *out_tokens) {
+    memset(out_tokens, TOK_DEFAULT, length);
+
+    Tokenizer tok;
+    tokenizer_init(&tok, data, length);
+
+    Token prev = {0};
+    prev.type = TOK_DEFAULT;
+
+    while (tok.t < tok.max_t) {
+        Token token = sql_get_next_token(&tok);
+        if (token.len == 0) break;
+
+        paint_token(out_tokens, token.start, token.len, token.type);
+
+        // Retroactively mark identifier before '(' as a function
+        if (token.type == TOK_PUNCTUATION && token.len == 1 &&
+            data[token.start] == '(' && prev.type == TOK_IDENTIFIER) {
+            paint_token(out_tokens, prev.start, prev.len, TOK_FUNCTION);
+        }
+
+        prev = token;
+    }
+}

c/lexer/lexer_theme.c

@@ -0,0 +1,502 @@
+// lexer_theme.c -- Built-in color themes
+//
+// Colors ported from the Focus editor theme files.
+// Hex values are RGB (alpha channel dropped, always opaque in terminal).
+
+#include "lexer/lexer_theme.h"
+
+S32 g_active_theme_idx = 0;
+
+Theme g_themes[THEME_COUNT] = {
+
+    ////////////////////////////////
+    // Default
+    // Uses the terminal's own 256-color palette. No background override.
+    {
+        .name = "Default",
+        .use_truecolor  = 0,
+        .colors = {
+            /* DEFAULT */           RGB_HEX(0xBDBDBD),
+            /* COMMENT */           RGB_HEX(0x6A6A6A),
+            /* MULTILINE_COMMENT */ RGB_HEX(0x6A6A6A),
+            /* STRING_LITERAL */    RGB_HEX(0x6AAF50),
+            /* CHAR_LITERAL */      RGB_HEX(0x6AAF50),
+            /* NUMBER */            RGB_HEX(0xC678DD),
+            /* IDENTIFIER */        RGB_HEX(0xBDBDBD),
+            /* FUNCTION */          RGB_HEX(0x56B6C2),
+            /* KEYWORD */           RGB_HEX(0xD19A66),
+            /* TYPE */              RGB_HEX(0x61AFEF),
+            /* VALUE */             RGB_HEX(0xC678DD),
+            /* MODIFIER */          RGB_HEX(0xE06C75),
+            /* DIRECTIVE */         RGB_HEX(0xE06C75),
+            /* PUNCTUATION */       RGB_HEX(0xBDBDBD),
+            /* OPERATION */         RGB_HEX(0xBDBDBD),
+            /* INVALID */           RGB_HEX(0xFF5555),
+        },
+        .ansi_colors = {
+            /* DEFAULT */           7,
+            /* COMMENT */           242,
+            /* MULTILINE_COMMENT */ 242,
+            /* STRING_LITERAL */    2,
+            /* CHAR_LITERAL */      2,
+            /* NUMBER */            5,
+            /* IDENTIFIER */        7,
+            /* FUNCTION */          6,
+            /* KEYWORD */           3,
+            /* TYPE */              4,
+            /* VALUE */             5,
+            /* MODIFIER */          1,
+            /* DIRECTIVE */         1,
+            /* PUNCTUATION */       7,
+            /* OPERATION */         7,
+            /* INVALID */           9,
+        },
+        .background    = RGB_HEX(0x1E1E1E),
+        .set_background = 0,
+        .status_bg     = RGB_HEX(0x252525),
+        .status_fg     = RGB_HEX(0xDDDDDD),
+        .status_fg_dim = RGB_HEX(0x888888),
+        .mb_bg         = RGB_HEX(0x3D5A80),
+        .mb_fg         = RGB_HEX(0xFFFFFF),
+        .mb_detail     = RGB_HEX(0x888888),
+    },
+
+    ////////////////////////////////
+    // Default Light
+    // Uses the terminal's own 256-color palette with a light background.
+    {
+        .name = "Default Light",
+        .use_truecolor  = 0,
+        .colors = {
+            /* DEFAULT */           RGB_HEX(0x383A42),
+            /* COMMENT */           RGB_HEX(0xA0A1A7),
+            /* MULTILINE_COMMENT */ RGB_HEX(0xA0A1A7),
+            /* STRING_LITERAL */    RGB_HEX(0xA62C21),
+            /* CHAR_LITERAL */      RGB_HEX(0xA62C21),
+            /* NUMBER */            RGB_HEX(0x986801),
+            /* IDENTIFIER */        RGB_HEX(0x383A42),
+            /* FUNCTION */          RGB_HEX(0x0184BC),
+            /* KEYWORD */           RGB_HEX(0x4078F2),
+            /* TYPE */              RGB_HEX(0x50A14F),
+            /* VALUE */             RGB_HEX(0x986801),
+            /* MODIFIER */          RGB_HEX(0x4078F2),
+            /* DIRECTIVE */         RGB_HEX(0xA62C21),
+            /* PUNCTUATION */       RGB_HEX(0x383A42),
+            /* OPERATION */         RGB_HEX(0x383A42),
+            /* INVALID */           RGB_HEX(0xFF0000),
+        },
+        .ansi_colors = {
+            /* DEFAULT */           0,    // black
+            /* COMMENT */           243,  // dark gray
+            /* MULTILINE_COMMENT */ 243,
+            /* STRING_LITERAL */    1,    // red
+            /* CHAR_LITERAL */      1,
+            /* NUMBER */            5,    // magenta
+            /* IDENTIFIER */        0,    // black
+            /* FUNCTION */          6,    // cyan
+            /* KEYWORD */           4,    // blue
+            /* TYPE */              2,    // green
+            /* VALUE */             5,    // magenta
+            /* MODIFIER */          4,    // blue
+            /* DIRECTIVE */         1,    // red
+            /* PUNCTUATION */       0,    // black
+            /* OPERATION */         0,    // black
+            /* INVALID */           9,    // bright red
+        },
+        .background    = RGB_HEX(0xFAFAFA),
+        .set_background = 0,
+        .status_bg     = RGB_HEX(0xD0D0D0),
+        .status_fg     = RGB_HEX(0x000000),
+        .status_fg_dim = RGB_HEX(0x606060),
+        .mb_bg         = RGB_HEX(0x0060C0),
+        .mb_fg         = RGB_HEX(0xFFFFFF),
+        .mb_detail     = RGB_HEX(0x808080),
+    },
+
+    ////////////////////////////////
+    // Focus
+    // The default Focus editor theme.
+    {
+        .name = "Focus",
+        .use_truecolor  = 1,
+        .colors = {
+            /* DEFAULT */           RGB_HEX(0xBFC9DB),
+            /* COMMENT */           RGB_HEX(0x87919D),
+            /* MULTILINE_COMMENT */ RGB_HEX(0x87919D),
+            /* STRING_LITERAL */    RGB_HEX(0xD4BC7D),
+            /* CHAR_LITERAL */      RGB_HEX(0xD4BC7D),
+            /* NUMBER */            RGB_HEX(0xD699B5),
+            /* IDENTIFIER */        RGB_HEX(0xBFC9DB),
+            /* FUNCTION */          RGB_HEX(0xD0C5A9),
+            /* KEYWORD */           RGB_HEX(0xE67D74),
+            /* TYPE */              RGB_HEX(0x82AAA3),
+            /* VALUE */             RGB_HEX(0xD699B5),
+            /* MODIFIER */          RGB_HEX(0xE67D74),
+            /* DIRECTIVE */         RGB_HEX(0xE67D74),
+            /* PUNCTUATION */       RGB_HEX(0xBFC9DB),
+            /* OPERATION */         RGB_HEX(0xE0AD82),
+            /* INVALID */           RGB_HEX(0xFF0000),
+        },
+        .ansi_colors = {},
+        .background     = RGB_HEX(0x15212A),
+        .set_background = 1,
+        .status_bg     = RGB_HEX(0x0C1620),
+        .status_fg     = RGB_HEX(0xBFC9DB),
+        .status_fg_dim = RGB_HEX(0x607080),
+        .mb_bg         = RGB_HEX(0x1C3040),
+        .mb_fg         = RGB_HEX(0xBFC9DB),
+        .mb_detail     = RGB_HEX(0x607080),
+    },
+
+    ////////////////////////////////
+    // Handmade Hero
+    // Based on Casey Muratori's emacs theme from the Handmade Hero series.
+    {
+        .name = "Handmade Hero",
+        .use_truecolor  = 1,
+        .colors = {
+            /* DEFAULT */           RGB_HEX(0xCDAA7D),
+            /* COMMENT */           RGB_HEX(0x7F7F7F),
+            /* MULTILINE_COMMENT */ RGB_HEX(0x87919D),
+            /* STRING_LITERAL */    RGB_HEX(0x6B8E23),
+            /* CHAR_LITERAL */      RGB_HEX(0x6B8E23),
+            /* NUMBER */            RGB_HEX(0xD699B5),
+            /* IDENTIFIER */        RGB_HEX(0xBFC9DB),
+            /* FUNCTION */          RGB_HEX(0xCDAA7D),
+            /* KEYWORD */           RGB_HEX(0xB8860B),
+            /* TYPE */              RGB_HEX(0xB8860B),
+            /* VALUE */             RGB_HEX(0x6B8E23),
+            /* MODIFIER */          RGB_HEX(0xE67D74),
+            /* DIRECTIVE */         RGB_HEX(0xE67D74),
+            /* PUNCTUATION */       RGB_HEX(0xCDAA7D),
+            /* OPERATION */         RGB_HEX(0xCDAA7D),
+            /* INVALID */           RGB_HEX(0xFF0000),
+        },
+        .ansi_colors = {},
+        .background     = RGB_HEX(0x161616),
+        .set_background = 1,
+        .status_bg     = RGB_HEX(0x0C0C0C),
+        .status_fg     = RGB_HEX(0xCDAA7D),
+        .status_fg_dim = RGB_HEX(0x6B5A3F),
+        .mb_bg         = RGB_HEX(0x403020),
+        .mb_fg         = RGB_HEX(0xCDAA7D),
+        .mb_detail     = RGB_HEX(0x6B5A3F),
+    },
+
+    ////////////////////////////////
+    // Witness Classic
+    // Jonathan Blow's classic color scheme.
+    {
+        .name = "Witness Classic",
+        .use_truecolor  = 1,
+        .colors = {
+            /* DEFAULT */           RGB_HEX(0xD3B58D),
+            /* COMMENT */           RGB_HEX(0xFFFF00),
+            /* MULTILINE_COMMENT */ RGB_HEX(0x87919D),
+            /* STRING_LITERAL */    RGB_HEX(0xBEBEBE),
+            /* CHAR_LITERAL */      RGB_HEX(0xBEBEBE),
+            /* NUMBER */            RGB_HEX(0xD699B5),
+            /* IDENTIFIER */        RGB_HEX(0xBFC9DB),
+            /* FUNCTION */          RGB_HEX(0xD3B58D),
+            /* KEYWORD */           RGB_HEX(0xFFFFFF),
+            /* TYPE */              RGB_HEX(0x98FB98),
+            /* VALUE */             RGB_HEX(0x7FFFD4),
+            /* MODIFIER */          RGB_HEX(0xE67D74),
+            /* DIRECTIVE */         RGB_HEX(0xE67D74),
+            /* PUNCTUATION */       RGB_HEX(0xD3B58D),
+            /* OPERATION */         RGB_HEX(0xD3B58D),
+            /* INVALID */           RGB_HEX(0xFF0000),
+        },
+        .ansi_colors = {},
+        .background     = RGB_HEX(0x292929),
+        .set_background = 1,
+        .status_bg     = RGB_HEX(0x222222),
+        .status_fg     = RGB_HEX(0xDDDDDD),
+        .status_fg_dim = RGB_HEX(0x888888),
+        .mb_bg         = RGB_HEX(0x3A3A50),
+        .mb_fg         = RGB_HEX(0xFFFFFF),
+        .mb_detail     = RGB_HEX(0x888888),
+    },
+
+    ////////////////////////////////
+    // Witness
+    // Jonathan Blow's alternative dark-teal theme.
+    {
+        .name = "Witness",
+        .use_truecolor  = 1,
+        .colors = {
+            /* DEFAULT */           RGB_HEX(0xD3B58D),
+            /* COMMENT */           RGB_HEX(0x3DDF23),
+            /* MULTILINE_COMMENT */ RGB_HEX(0x87919D),
+            /* STRING_LITERAL */    RGB_HEX(0x0FDFAF),
+            /* CHAR_LITERAL */      RGB_HEX(0x0FDFAF),
+            /* NUMBER */            RGB_HEX(0xD699B5),
+            /* IDENTIFIER */        RGB_HEX(0xBFC9DB),
+            /* FUNCTION */          RGB_HEX(0xD3B58D),
+            /* KEYWORD */           RGB_HEX(0xFFFFFF),
+            /* TYPE */              RGB_HEX(0x98FB98),
+            /* VALUE */             RGB_HEX(0x7FFFD4),
+            /* MODIFIER */          RGB_HEX(0xE67D74),
+            /* DIRECTIVE */         RGB_HEX(0xE67D74),
+            /* PUNCTUATION */       RGB_HEX(0xD3B58D),
+            /* OPERATION */         RGB_HEX(0xE0AD82),
+            /* INVALID */           RGB_HEX(0xFF0000),
+        },
+        .ansi_colors = {},
+        .background     = RGB_HEX(0x072626),
+        .set_background = 1,
+        .status_bg     = RGB_HEX(0x041818),
+        .status_fg     = RGB_HEX(0xD3B58D),
+        .status_fg_dim = RGB_HEX(0x6B7A6B),
+        .mb_bg         = RGB_HEX(0x0E3A3A),
+        .mb_fg         = RGB_HEX(0xD3B58D),
+        .mb_detail     = RGB_HEX(0x6B7A6B),
+    },
+
+    ////////////////////////////////
+    // Visual Studio Classic
+    // Light theme matching Visual Studio 6.0 (1998).
+    {
+        .name = "VS Classic",
+        .use_truecolor  = 1,
+        .colors = {
+            /* DEFAULT */           RGB_HEX(0x000000),
+            /* COMMENT */           RGB_HEX(0x008000),
+            /* MULTILINE_COMMENT */ RGB_HEX(0x008000),
+            /* STRING_LITERAL */    RGB_HEX(0x800000),
+            /* CHAR_LITERAL */      RGB_HEX(0x800000),
+            /* NUMBER */            RGB_HEX(0x000000),
+            /* IDENTIFIER */        RGB_HEX(0x000000),
+            /* FUNCTION */          RGB_HEX(0x000000),
+            /* KEYWORD */           RGB_HEX(0x0000FF),
+            /* TYPE */              RGB_HEX(0x0000FF),
+            /* VALUE */             RGB_HEX(0x0000FF),
+            /* MODIFIER */          RGB_HEX(0x0000FF),
+            /* DIRECTIVE */         RGB_HEX(0x0000FF),
+            /* PUNCTUATION */       RGB_HEX(0x000000),
+            /* OPERATION */         RGB_HEX(0x000000),
+            /* INVALID */           RGB_HEX(0xFF0000),
+        },
+        .ansi_colors = {},
+        .background     = RGB_HEX(0xFFFFFF),
+        .set_background = 1,
+        .status_bg     = RGB_HEX(0xD4D0C8),
+        .status_fg     = RGB_HEX(0x000000),
+        .status_fg_dim = RGB_HEX(0x606060),
+        .mb_bg         = RGB_HEX(0x0A246A),
+        .mb_fg         = RGB_HEX(0xFFFFFF),
+        .mb_detail     = RGB_HEX(0xA0A0A0),
+        .fb_bg         = RGB_HEX(0xFFFFFF),
+        .set_fb_bg     = 1,
+    },
+
+    ////////////////////////////////
+    // RAD Debugger
+    // Default color scheme from the RAD Debugger project.
+    {
+        .name = "RAD Debugger",
+        .use_truecolor  = 1,
+        .colors = {
+            /* DEFAULT */           RGB_HEX(0xDADADA),
+            /* COMMENT */           RGB_HEX(0x5D7856),
+            /* MULTILINE_COMMENT */ RGB_HEX(0x5D7856),
+            /* STRING_LITERAL */    RGB_HEX(0xFFA070),
+            /* CHAR_LITERAL */      RGB_HEX(0xFFA070),
+            /* NUMBER */            RGB_HEX(0xD0D0A0),
+            /* IDENTIFIER */        RGB_HEX(0xDADADA),
+            /* FUNCTION */          RGB_HEX(0xDADADA),
+            /* KEYWORD */           RGB_HEX(0xF0C674),
+            /* TYPE */              RGB_HEX(0x70C0B0),
+            /* VALUE */             RGB_HEX(0xD0D0A0),
+            /* MODIFIER */          RGB_HEX(0xF0C674),
+            /* DIRECTIVE */         RGB_HEX(0xCC7070),
+            /* PUNCTUATION */       RGB_HEX(0xDADADA),
+            /* OPERATION */         RGB_HEX(0xDADADA),
+            /* INVALID */           RGB_HEX(0xFF0000),
+        },
+        .ansi_colors = {},
+        .background     = RGB_HEX(0x1C1C1C),
+        .set_background = 1,
+        .status_bg     = RGB_HEX(0x121212),
+        .status_fg     = RGB_HEX(0xDADADA),
+        .status_fg_dim = RGB_HEX(0x707070),
+        .mb_bg         = RGB_HEX(0x3A2A1A),
+        .mb_fg         = RGB_HEX(0xDADADA),
+        .mb_detail     = RGB_HEX(0x707070),
+    },
+
+    ////////////////////////////////
+    // 4coder
+    // Default theme from Allen Webster's 4coder editor.
+    {
+        .name = "4coder",
+        .use_truecolor  = 1,
+        .colors = {
+            /* DEFAULT */           RGB_HEX(0x90B080),
+            /* COMMENT */           RGB_HEX(0x2090F0),
+            /* MULTILINE_COMMENT */ RGB_HEX(0x2090F0),
+            /* STRING_LITERAL */    RGB_HEX(0x50FF30),
+            /* CHAR_LITERAL */      RGB_HEX(0x50FF30),
+            /* NUMBER */            RGB_HEX(0x50FF30),
+            /* IDENTIFIER */        RGB_HEX(0x90B080),
+            /* FUNCTION */          RGB_HEX(0x90B080),
+            /* KEYWORD */           RGB_HEX(0xD08F20),
+            /* TYPE */              RGB_HEX(0xD08F20),
+            /* VALUE */             RGB_HEX(0x50FF30),
+            /* MODIFIER */          RGB_HEX(0xD08F20),
+            /* DIRECTIVE */         RGB_HEX(0xFF5F5F),
+            /* PUNCTUATION */       RGB_HEX(0x90B080),
+            /* OPERATION */         RGB_HEX(0x90B080),
+            /* INVALID */           RGB_HEX(0xFF0000),
+        },
+        .ansi_colors = {},
+        .background     = RGB_HEX(0x0C0C0C),
+        .set_background = 1,
+        .status_bg     = RGB_HEX(0x1A1A1A),
+        .status_fg     = RGB_HEX(0x90B080),
+        .status_fg_dim = RGB_HEX(0x506050),
+        .mb_bg         = RGB_HEX(0x2A3A20),
+        .mb_fg         = RGB_HEX(0x90B080),
+        .mb_detail     = RGB_HEX(0x606060),
+    },
+
+    ////////////////////////////////
+    // Ryan Fleury
+    // Ryan Fleury's personal theme, ported from the fleury-theme.el emacs package.
+    {
+        .name = "Ryan Fleury",
+        .use_truecolor  = 1,
+        .colors = {
+            /* DEFAULT */           RGB_HEX(0xB99468),
+            /* COMMENT */           RGB_HEX(0x666666),
+            /* MULTILINE_COMMENT */ RGB_HEX(0x666666),
+            /* STRING_LITERAL */    RGB_HEX(0xFFAA00),
+            /* CHAR_LITERAL */      RGB_HEX(0xFFAA00),
+            /* NUMBER */            RGB_HEX(0xFFAA00),
+            /* IDENTIFIER */        RGB_HEX(0xB99468),
+            /* FUNCTION */          RGB_HEX(0xDE451F),
+            /* KEYWORD */           RGB_HEX(0xF0C674),
+            /* TYPE */              RGB_HEX(0xEDB211),
+            /* VALUE */             RGB_HEX(0xFFAA00),
+            /* MODIFIER */          RGB_HEX(0xF0C674),
+            /* DIRECTIVE */         RGB_HEX(0xDC7575),
+            /* PUNCTUATION */       RGB_HEX(0xB99468),
+            /* OPERATION */         RGB_HEX(0xB99468),
+            /* INVALID */           RGB_HEX(0xFF0000),
+        },
+        .ansi_colors = {},
+        .background     = RGB_HEX(0x020202),
+        .set_background = 1,
+        .status_bg     = RGB_HEX(0x1A120B),
+        .status_fg     = RGB_HEX(0xE7AA4D),
+        .status_fg_dim = RGB_HEX(0x63523D),
+        .mb_bg         = RGB_HEX(0x3A2510),
+        .mb_fg         = RGB_HEX(0xE7AA4D),
+        .mb_detail     = RGB_HEX(0x63523D),
+    },
+
+    ////////////////////////////////
+    // Gruber Darker
+    // Gruber Darker theme by Alexey Kutepov (rexim).
+    {
+        .name = "Gruber Darker",
+        .use_truecolor  = 1,
+        .colors = {
+            /* DEFAULT */           RGB_HEX(0xE4E4EF),
+            /* COMMENT */           RGB_HEX(0x565F73),
+            /* MULTILINE_COMMENT */ RGB_HEX(0x565F73),
+            /* STRING_LITERAL */    RGB_HEX(0x73C936),
+            /* CHAR_LITERAL */      RGB_HEX(0x73C936),
+            /* NUMBER */            RGB_HEX(0xFFDD33),
+            /* IDENTIFIER */        RGB_HEX(0xE4E4EF),
+            /* FUNCTION */          RGB_HEX(0x96A6C8),
+            /* KEYWORD */           RGB_HEX(0xFFDD33),
+            /* TYPE */              RGB_HEX(0x96A6C8),
+            /* VALUE */             RGB_HEX(0xFFDD33),
+            /* MODIFIER */          RGB_HEX(0x9E95C7),
+            /* DIRECTIVE */         RGB_HEX(0x9E95C7),
+            /* PUNCTUATION */       RGB_HEX(0xE4E4EF),
+            /* OPERATION */         RGB_HEX(0xE4E4EF),
+            /* INVALID */           RGB_HEX(0xF43841),
+        },
+        .ansi_colors = {},
+        .background     = RGB_HEX(0x181818),
+        .set_background = 1,
+        .status_bg     = RGB_HEX(0x101010),
+        .status_fg     = RGB_HEX(0xE4E4EF),
+        .status_fg_dim = RGB_HEX(0x565F73),
+        .mb_bg         = RGB_HEX(0x282828),
+        .mb_fg         = RGB_HEX(0xE4E4EF),
+        .mb_detail     = RGB_HEX(0x95A99F),
+    },
+
+    ////////////////////////////////
+    // VS Dark
+    // Visual Studio Dark theme.
+    {
+        .name = "VS Dark",
+        .use_truecolor  = 1,
+        .colors = {
+            /* DEFAULT */           RGB_HEX(0xDCDCAA),
+            /* COMMENT */           RGB_HEX(0x6A9955),
+            /* MULTILINE_COMMENT */ RGB_HEX(0x6A9955),
+            /* STRING_LITERAL */    RGB_HEX(0xCE9178),
+            /* CHAR_LITERAL */      RGB_HEX(0xCE9178),
+            /* NUMBER */            RGB_HEX(0xB5CEA8),
+            /* IDENTIFIER */        RGB_HEX(0x9CDCFE),
+            /* FUNCTION */          RGB_HEX(0xDCDCAA),
+            /* KEYWORD */           RGB_HEX(0x569CD6),
+            /* TYPE */              RGB_HEX(0x4EC9B0),
+            /* VALUE */             RGB_HEX(0x569CD6),
+            /* MODIFIER */          RGB_HEX(0x569CD6),
+            /* DIRECTIVE */         RGB_HEX(0xC586C0),
+            /* PUNCTUATION */       RGB_HEX(0xD4D4D4),
+            /* OPERATION */         RGB_HEX(0xD4D4D4),
+            /* INVALID */           RGB_HEX(0xFF0000),
+        },
+        .ansi_colors = {},
+        .background     = RGB_HEX(0x1E1E1E),
+        .set_background = 1,
+        .status_bg     = RGB_HEX(0x252526),
+        .status_fg     = RGB_HEX(0xCCCCCC),
+        .status_fg_dim = RGB_HEX(0x808080),
+        .mb_bg         = RGB_HEX(0x094771),
+        .mb_fg         = RGB_HEX(0xFFFFFF),
+        .mb_detail     = RGB_HEX(0x808080),
+    },
+
+    ////////////////////////////////
+    // Freshcut Contrast
+    // High-contrast dark theme by Dayle Rees.
+    {
+        .name = "Freshcut Contrast",
+        .use_truecolor  = 1,
+        .colors = {
+            /* DEFAULT */           RGB_HEX(0xF8F8F2),
+            /* COMMENT */           RGB_HEX(0x737B84),
+            /* MULTILINE_COMMENT */ RGB_HEX(0x737B84),
+            /* STRING_LITERAL */    RGB_HEX(0xE9EE00),
+            /* CHAR_LITERAL */      RGB_HEX(0xE9EE00),
+            /* NUMBER */            RGB_HEX(0x8FBE00),
+            /* IDENTIFIER */        RGB_HEX(0xF8F8F2),
+            /* FUNCTION */          RGB_HEX(0xAEE239),
+            /* KEYWORD */           RGB_HEX(0xC8D7E8),
+            /* TYPE */              RGB_HEX(0x4ECDC4),
+            /* VALUE */             RGB_HEX(0x8FBE00),
+            /* MODIFIER */          RGB_HEX(0x00A8C6),
+            /* DIRECTIVE */         RGB_HEX(0x00A8C6),
+            /* PUNCTUATION */       RGB_HEX(0xF8F8F2),
+            /* OPERATION */         RGB_HEX(0xF8F8F2),
+            /* INVALID */           RGB_HEX(0xFF0000),
+        },
+        .ansi_colors = {},
+        .background     = RGB_HEX(0x000000),
+        .set_background = 1,
+        .status_bg     = RGB_HEX(0x3C3C3C),
+        .status_fg     = RGB_HEX(0xE0E0E0),
+        .status_fg_dim = RGB_HEX(0x808080),
+        .mb_bg         = RGB_HEX(0x505050),
+        .mb_fg         = RGB_HEX(0xFFFFFF),
+        .mb_detail     = RGB_HEX(0x909090),
+    },
+};

c/lexer/lexer_theme.h

@@ -0,0 +1,50 @@
+#pragma once
+// lexer_theme.h -- Color themes for syntax highlighting
+//
+// Each theme maps Token_Type values to 24-bit RGB colors, plus a background.
+// Themes use true-color ANSI escapes (supported by Windows Terminal, most
+// modern terminals).
+
+#include "base/base_core.h"
+#include "lexer/lexer.h"
+
+////////////////////////////////
+// RGB color
+
+typedef struct RGB { U8 r, g, b; } RGB;
+
+// Use for static initializers (no compound literal — MSVC C11 compat)
+#define RGB_HEX(hex) { ((hex) >> 16) & 0xFF, ((hex) >> 8) & 0xFF, (hex) & 0xFF }
+
+////////////////////////////////
+// Theme
+
+typedef struct Theme {
+    const char *name;
+    B32  use_truecolor;       // if false, use ansi_colors[] with term_fg() instead
+    RGB  colors[TOK_COUNT];   // foreground color per token type (true color)
+    U8   ansi_colors[TOK_COUNT]; // foreground per token type (256-color fallback)
+    RGB  background;          // terminal background color
+    B32  set_background;      // whether to override terminal background
+
+    // UI chrome colors
+    RGB  status_bg;           // status bar background
+    RGB  status_fg;           // status bar foreground (focused)
+    RGB  status_fg_dim;       // status bar foreground (unfocused)
+    RGB  mb_bg;               // minibuffer item background (highlighted)
+    RGB  mb_fg;               // minibuffer item foreground (highlighted)
+    RGB  mb_detail;           // minibuffer detail text color
+    RGB  fb_bg;               // file browser background (0,0,0 = use WindowBg)
+    B32  set_fb_bg;           // whether to override file browser background
+} Theme;
+
+////////////////////////////////
+// Built-in themes
+
+#define THEME_COUNT 13
+
+extern Theme g_themes[THEME_COUNT];
+extern S32   g_active_theme_idx;
+
+// Convenience: pointer to the active theme
+static inline Theme *theme_active(void) { return &g_themes[g_active_theme_idx]; }

c/platform/platform.h

@@ -0,0 +1,130 @@
+#pragma once
+// platform.h — GUI windowing, input, and system services
+//
+// Provides window creation, keyboard/mouse input, clipboard access,
+// and process spawning. Implementation: platform_win32.c.
+
+#include "base/base_core.h"
+#include "base/base_math.h"
+
+////////////////////////////////
+// Key codes (matching Windows VK codes)
+
+enum {
+    PKEY_BACKSPACE = 0x08,
+    PKEY_TAB       = 0x09,
+    PKEY_RETURN    = 0x0D,
+    PKEY_ESCAPE    = 0x1B,
+    PKEY_PAGEUP    = 0x21,
+    PKEY_PAGEDOWN  = 0x22,
+    PKEY_END       = 0x23,
+    PKEY_HOME      = 0x24,
+    PKEY_LEFT      = 0x25,
+    PKEY_UP        = 0x26,
+    PKEY_RIGHT     = 0x27,
+    PKEY_DOWN      = 0x28,
+    PKEY_DELETE    = 0x2E,
+    PKEY_0         = 0x30,
+    PKEY_1         = 0x31,
+    PKEY_2         = 0x32,
+    PKEY_3         = 0x33,
+    PKEY_A         = 0x41,
+    PKEY_B         = 0x42,
+    PKEY_C         = 0x43,
+    PKEY_E         = 0x45,
+    PKEY_F         = 0x46,
+    PKEY_G         = 0x47,
+    PKEY_H         = 0x48,
+    PKEY_J         = 0x4A,
+    PKEY_K         = 0x4B,
+    PKEY_L         = 0x4C,
+    PKEY_N         = 0x4E,
+    PKEY_O         = 0x4F,
+    PKEY_P         = 0x50,
+    PKEY_Q         = 0x51,
+    PKEY_S         = 0x53,
+    PKEY_V         = 0x56,
+    PKEY_W         = 0x57,
+    PKEY_X         = 0x58,
+    PKEY_Y         = 0x59,
+    PKEY_Z         = 0x5A,
+    PKEY_F4        = 0x73,
+    PKEY_F8        = 0x77,
+    PKEY_EQUAL     = 0xBB,
+    PKEY_MINUS     = 0xBD,
+    PKEY_BACKSLASH = 0xDC,
+};
+
+////////////////////////////////
+// Input accumulated per frame
+
+#define PLATFORM_MAX_CHARS_PER_FRAME 64
+#define PLATFORM_MAX_KEYS_PER_FRAME  32
+
+// Editor-facing input (ASCII chars + key codes + modifiers)
+typedef struct PlatformInput {
+    char chars[PLATFORM_MAX_CHARS_PER_FRAME];
+    S32  char_count;
+
+    U8  keys[PLATFORM_MAX_KEYS_PER_FRAME];
+    S32  key_count;
+
+    B32  ctrl_held;
+    B32  shift_held;
+    B32  alt_held;
+} PlatformInput;
+
+// Raw windowing input (UTF-16 chars + VK codes + mouse)
+typedef struct PlatformRawInput {
+    U16      chars[PLATFORM_MAX_CHARS_PER_FRAME];
+    S32      char_count;
+    U8       keys[PLATFORM_MAX_KEYS_PER_FRAME];
+    S32      key_count;
+    B32      ctrl_held;
+    B32      shift_held;
+    Vec2F32  mouse_pos;
+    Vec2F32  scroll_delta;
+    B32      mouse_down;
+    B32      was_mouse_down;
+} PlatformRawInput;
+
+////////////////////////////////
+// Window
+
+typedef struct PlatformWindow PlatformWindow;
+
+typedef struct PlatformWindowDesc {
+    const char *title;
+    S32         width;
+    S32         height;
+} PlatformWindowDesc;
+
+typedef void (*PlatformFrameCallback)(void *user_data);
+
+////////////////////////////////
+// Window API
+
+PlatformWindow *platform_create_window(PlatformWindowDesc *desc);
+void            platform_destroy_window(PlatformWindow *window);
+B32             platform_poll_events(PlatformWindow *window);
+void            platform_get_size(PlatformWindow *window, S32 *w, S32 *h);
+void           *platform_get_native_handle(PlatformWindow *window);
+PlatformRawInput platform_get_input(PlatformWindow *window);
+void            platform_set_frame_callback(PlatformWindow *window, PlatformFrameCallback cb, void *user_data);
+F32             platform_get_dpi_scale(PlatformWindow *window);
+
+////////////////////////////////
+// Input adapter — convert raw windowing input to editor input
+
+PlatformInput platform_adapt_input(PlatformRawInput *raw);
+
+////////////////////////////////
+// Clipboard
+
+void        platform_clipboard_set(const char *text);
+const char *platform_clipboard_get(void);
+
+////////////////////////////////
+// Process spawning
+
+void platform_spawn_terminal(const char *command, const char *working_dir);

c/platform/platform_win32.c

@@ -0,0 +1,297 @@
+// platform_win32.c — Win32 windowing, input, clipboard, and process spawning
+
+#include "platform/platform.h"
+
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+#include <windows.h>
+#include <malloc.h>
+#include <stdlib.h>
+#include <string.h>
+
+////////////////////////////////
+// Window internals
+
+struct PlatformWindow {
+    HWND                  hwnd;
+    B32                   should_close;
+    S32                   width;
+    S32                   height;
+    PlatformFrameCallback frame_callback;
+    void                 *frame_callback_user_data;
+    PlatformRawInput      input;
+    B32                   prev_mouse_down;
+};
+
+static PlatformWindow *g_main_window = NULL;
+static B32 g_wndclass_registered = false;
+
+////////////////////////////////
+// Window procedure
+
+// Forward declare ImGui Win32 handler (defined in imgui_impl_win32.cpp)
+extern LRESULT ImGui_ImplWin32_WndProcHandler(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam);
+
+static LRESULT CALLBACK platform_wndproc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam) {
+    // Let ImGui process input first
+    if (ImGui_ImplWin32_WndProcHandler(hwnd, msg, wparam, lparam))
+        return true;
+
+    PlatformWindow *pw = (PlatformWindow *)GetWindowLongPtr(hwnd, GWLP_USERDATA);
+
+    switch (msg) {
+    case WM_SIZE:
+        if (pw && wparam != SIZE_MINIMIZED) {
+            pw->width  = (S32)LOWORD(lparam);
+            pw->height = (S32)HIWORD(lparam);
+            if (pw->frame_callback)
+                pw->frame_callback(pw->frame_callback_user_data);
+        }
+        return 0;
+    case WM_CHAR:
+        if (pw && wparam >= 32 && wparam < 0xFFFF) {
+            PlatformRawInput *ev = &pw->input;
+            if (ev->char_count < PLATFORM_MAX_CHARS_PER_FRAME)
+                ev->chars[ev->char_count++] = (U16)wparam;
+        }
+        return 0;
+    case WM_KEYDOWN:
+    case WM_SYSKEYDOWN:
+        if (pw) {
+            PlatformRawInput *ev = &pw->input;
+            if (ev->key_count < PLATFORM_MAX_KEYS_PER_FRAME)
+                ev->keys[ev->key_count++] = (U8)wparam;
+            ev->ctrl_held  = (GetKeyState(VK_CONTROL) & 0x8000) != 0;
+            ev->shift_held = (GetKeyState(VK_SHIFT) & 0x8000) != 0;
+        }
+        break;
+    case WM_MOUSEWHEEL:
+        if (pw) {
+            S16 wheel_delta = (S16)HIWORD(wparam);
+            pw->input.scroll_delta.y += (F32)wheel_delta / (F32)WHEEL_DELTA * 6.0f;
+        }
+        return 0;
+    case WM_SETCURSOR:
+        if (LOWORD(lparam) == HTCLIENT) {
+            SetCursor(LoadCursor(NULL, IDC_IBEAM));
+            return TRUE;
+        }
+        break;
+    case WM_DPICHANGED:
+        if (pw) {
+            RECT *suggested = (RECT *)lparam;
+            SetWindowPos(hwnd, NULL, suggested->left, suggested->top,
+                suggested->right - suggested->left, suggested->bottom - suggested->top,
+                SWP_NOZORDER | SWP_NOACTIVATE);
+        }
+        return 0;
+    case WM_CLOSE:
+        if (pw) pw->should_close = true;
+        return 0;
+    case WM_DESTROY:
+        if (pw == g_main_window)
+            PostQuitMessage(0);
+        return 0;
+    case WM_SYSCOMMAND:
+        if ((wparam & 0xfff0) == SC_KEYMENU)
+            return 0;
+        break;
+    }
+    return DefWindowProcW(hwnd, msg, wparam, lparam);
+}
+
+////////////////////////////////
+// Window lifecycle
+
+PlatformWindow *platform_create_window(PlatformWindowDesc *desc) {
+    SetProcessDpiAwarenessContext(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2);
+
+    if (!g_wndclass_registered) {
+        WNDCLASSEXW wc = {0};
+        wc.cbSize        = sizeof(wc);
+        wc.style         = CS_CLASSDC;
+        wc.lpfnWndProc   = platform_wndproc;
+        wc.hInstance     = GetModuleHandleW(NULL);
+        wc.hIcon         = LoadIconW(wc.hInstance, MAKEINTRESOURCEW(101));
+        wc.hIconSm       = LoadIconW(wc.hInstance, MAKEINTRESOURCEW(101));
+        wc.hCursor       = LoadCursor(NULL, IDC_ARROW);
+        wc.lpszClassName = L"codemax_wc";
+        RegisterClassExW(&wc);
+        g_wndclass_registered = true;
+    }
+
+    UINT dpi = GetDpiForSystem();
+    int screen_w = GetSystemMetrics(SM_CXSCREEN);
+    int screen_h = GetSystemMetrics(SM_CYSCREEN);
+    int x = (screen_w - desc->width) / 2;
+    int y = (screen_h - desc->height) / 2;
+
+    DWORD style = WS_OVERLAPPEDWINDOW;
+    RECT rect = { 0, 0, (LONG)desc->width, (LONG)desc->height };
+    AdjustWindowRectExForDpi(&rect, style, FALSE, 0, dpi);
+
+    int wchar_count = MultiByteToWideChar(CP_UTF8, 0, desc->title, -1, NULL, 0);
+    wchar_t *wtitle = (wchar_t *)_malloca(wchar_count * sizeof(wchar_t));
+    MultiByteToWideChar(CP_UTF8, 0, desc->title, -1, wtitle, wchar_count);
+
+    HWND hwnd = CreateWindowExW(
+        0, L"codemax_wc", wtitle,
+        style,
+        x, y,
+        rect.right - rect.left,
+        rect.bottom - rect.top,
+        NULL, NULL, GetModuleHandleW(NULL), NULL
+    );
+    _freea(wtitle);
+
+    if (!hwnd) return NULL;
+
+    PlatformWindow *window = (PlatformWindow *)calloc(1, sizeof(PlatformWindow));
+    window->hwnd         = hwnd;
+    window->should_close = false;
+    window->width        = desc->width;
+    window->height       = desc->height;
+
+    SetWindowLongPtr(hwnd, GWLP_USERDATA, (LONG_PTR)window);
+    g_main_window = window;
+
+    ShowWindow(hwnd, SW_SHOWDEFAULT);
+    UpdateWindow(hwnd);
+    return window;
+}
+
+void platform_destroy_window(PlatformWindow *window) {
+    if (!window) return;
+    if (window->hwnd) DestroyWindow(window->hwnd);
+    if (g_main_window == window) g_main_window = NULL;
+    free(window);
+}
+
+B32 platform_poll_events(PlatformWindow *window) {
+    MSG msg;
+    while (PeekMessageW(&msg, NULL, 0, 0, PM_REMOVE)) {
+        TranslateMessage(&msg);
+        DispatchMessageW(&msg);
+        if (msg.message == WM_QUIT)
+            window->should_close = true;
+    }
+    return !window->should_close;
+}
+
+void platform_get_size(PlatformWindow *window, S32 *w, S32 *h) {
+    if (w) *w = window->width;
+    if (h) *h = window->height;
+}
+
+void *platform_get_native_handle(PlatformWindow *window) {
+    return (void *)window->hwnd;
+}
+
+PlatformRawInput platform_get_input(PlatformWindow *window) {
+    PlatformRawInput result = window->input;
+
+    POINT cursor;
+    GetCursorPos(&cursor);
+    ScreenToClient(window->hwnd, &cursor);
+    result.mouse_pos = v2f32((F32)cursor.x, (F32)cursor.y);
+
+    result.was_mouse_down = window->prev_mouse_down;
+    result.mouse_down = (GetAsyncKeyState(VK_LBUTTON) & 0x8000) != 0;
+    window->prev_mouse_down = result.mouse_down;
+
+    memset(&window->input, 0, sizeof(window->input));
+    return result;
+}
+
+void platform_set_frame_callback(PlatformWindow *window, PlatformFrameCallback cb, void *user_data) {
+    window->frame_callback = cb;
+    window->frame_callback_user_data = user_data;
+}
+
+F32 platform_get_dpi_scale(PlatformWindow *window) {
+    if (!window || !window->hwnd) return 1.0f;
+    return (F32)GetDpiForWindow(window->hwnd) / 96.0f;
+}
+
+////////////////////////////////
+// Input adapter
+
+PlatformInput platform_adapt_input(PlatformRawInput *raw) {
+    PlatformInput pi = {0};
+    pi.ctrl_held = raw->ctrl_held;
+    pi.shift_held = raw->shift_held;
+    pi.alt_held = (GetKeyState(VK_MENU) & 0x8000) != 0;
+
+    // Convert UTF-16 chars to ASCII (printable range only)
+    for (S32 i = 0; i < raw->char_count && pi.char_count < PLATFORM_MAX_CHARS_PER_FRAME; i++) {
+        U16 ch = raw->chars[i];
+        if (ch >= 32 && ch < 127)
+            pi.chars[pi.char_count++] = (char)ch;
+    }
+
+    // Key codes are identical (both use Windows VK codes)
+    for (S32 i = 0; i < raw->key_count && pi.key_count < PLATFORM_MAX_KEYS_PER_FRAME; i++)
+        pi.keys[pi.key_count++] = raw->keys[i];
+
+    return pi;
+}
+
+////////////////////////////////
+// Clipboard
+
+void platform_clipboard_set(const char *text) {
+    if (!text) return;
+    int len = (int)strlen(text);
+    if (len == 0) return;
+    int wlen = MultiByteToWideChar(CP_UTF8, 0, text, len, NULL, 0);
+    if (wlen == 0) return;
+    HGLOBAL hmem = GlobalAlloc(GMEM_MOVEABLE, (wlen + 1) * sizeof(wchar_t));
+    if (!hmem) return;
+    wchar_t *wbuf = (wchar_t *)GlobalLock(hmem);
+    MultiByteToWideChar(CP_UTF8, 0, text, len, wbuf, wlen);
+    wbuf[wlen] = L'\0';
+    GlobalUnlock(hmem);
+    HWND hwnd = g_main_window ? g_main_window->hwnd : NULL;
+    if (OpenClipboard(hwnd)) {
+        EmptyClipboard();
+        SetClipboardData(CF_UNICODETEXT, hmem);
+        CloseClipboard();
+    } else {
+        GlobalFree(hmem);
+    }
+}
+
+const char *platform_clipboard_get(void) {
+    static char buf[64 * 1024];
+    buf[0] = '\0';
+    HWND hwnd = g_main_window ? g_main_window->hwnd : NULL;
+    if (!OpenClipboard(hwnd)) return NULL;
+    HGLOBAL hmem = GetClipboardData(CF_UNICODETEXT);
+    if (hmem) {
+        wchar_t *wbuf = (wchar_t *)GlobalLock(hmem);
+        if (wbuf) {
+            int len = WideCharToMultiByte(CP_UTF8, 0, wbuf, -1, buf, sizeof(buf) - 1, NULL, NULL);
+            buf[len > 0 ? len - 1 : 0] = '\0';
+            GlobalUnlock(hmem);
+        }
+    }
+    CloseClipboard();
+    return buf[0] ? buf : NULL;
+}
+
+////////////////////////////////
+// Process spawning
+
+void platform_spawn_terminal(const char *command, const char *working_dir) {
+    char cmd_line[2048];
+    snprintf(cmd_line, sizeof(cmd_line), "cmd.exe /k %s", command);
+
+    STARTUPINFOA si = {0};
+    si.cb = sizeof(si);
+    PROCESS_INFORMATION pi = {0};
+    CreateProcessA(NULL, cmd_line, NULL, NULL, FALSE,
+                   CREATE_NEW_CONSOLE, NULL, working_dir, &si, &pi);
+    if (pi.hProcess) CloseHandle(pi.hProcess);
+    if (pi.hThread) CloseHandle(pi.hThread);
+}