fix(extract): populate body_tokens before MinHash gate; add OS/TS identifier node types

Signed-off-by: Thomas Dyar <tdyar@intersystems.com>

internal/cbm/extract_defs.c

@@ -82,7 +82,7 @@ static bool try_append_ident(const char *source, uint32_t s, int len, uint32_t *
 /* Walk AST body, collect unique identifier text as space-separated string.
  * Returns arena-allocated string or NULL. */
 static char *extract_body_ident_tokens(CBMExtractCtx *ctx, TSNode body) {
-    enum { BT_STACK = 512, BT_BUF = 512, BT_MAX_IDENTS = 40, BT_SEEN = 128, BT_SEEN_MASK = 127 };
+    enum { BT_STACK = 512, BT_BUF = 2048, BT_MAX_IDENTS = 128, BT_SEEN = 256, BT_SEEN_MASK = 255 };
     TSNode bt_stack[BT_STACK];
     int bt_top = 0;
     bt_stack[bt_top++] = body;
@@ -98,9 +98,13 @@ static char *extract_body_ident_tokens(CBMExtractCtx *ctx, TSNode body) {
         if (nc == 0) {
             const char *k = ts_node_type(nd);
             if (strcmp(k, "identifier") == 0 || strcmp(k, "field_identifier") == 0 ||
-                strcmp(k, "property_identifier") == 0 ||
+                strcmp(k, "property_identifier") == 0 || strcmp(k, "type_identifier") == 0 ||
                 strcmp(k, "objectscript_identifier") == 0 ||
-                strcmp(k, "identifier_segment_immediate") == 0) {
+                strcmp(k, "objectscript_identifier_special") == 0 ||
+                strcmp(k, "identifier_segment_immediate") == 0 ||
+                strcmp(k, "identifier_segment_immediate_special") == 0 ||
+                strcmp(k, "class_name") == 0 || strcmp(k, "method_name") == 0 ||
+                strcmp(k, "routine_name") == 0 || strcmp(k, "quote_permitting_identifier") == 0) {
                 uint32_t s = ts_node_start_byte(nd);
                 int len = (int)(ts_node_end_byte(nd) - s);
                 if (len > 0 && len < CBM_SZ_64 && s < (uint32_t)ctx->source_len) {
@@ -130,6 +134,10 @@ static void compute_fingerprint(CBMExtractCtx *ctx, CBMDefinition *def, TSNode f
     if (ts_node_is_null(body)) {
         body = func_node;
     }
+    /* Extract raw identifier tokens from body for semantic search — before MinHash gate
+     * so short functions still get body_tokens even without a fingerprint. */
+    def->body_tokens = extract_body_ident_tokens(ctx, body);
+
     cbm_minhash_t result;
     if (!cbm_minhash_compute(body, ctx->source, (int)ctx->language, &result)) {
         return; /* Too short or empty — no fingerprint */
@@ -157,9 +165,6 @@ static void compute_fingerprint(CBMExtractCtx *ctx, CBMDefinition *def, TSNode f
         cbm_ast_profile_to_str(&profile, sp_buf, sizeof(sp_buf));
         def->structural_profile = cbm_arena_strdup(ctx->arena, sp_buf);
     }
-
-    /* Extract raw identifier tokens from body for semantic search */
-    def->body_tokens = extract_body_ident_tokens(ctx, body);
 }
 
 // Tree-sitter row is 0-based; lines are 1-based.

tests/test_extraction.c

@@ -812,6 +812,25 @@ TEST(ts_class) {
     PASS();
 }
 
+TEST(body_tokens_type_identifier) {
+    CBMFileResult *r = extract("function serialize(obj: MyModel): SerializedResult {\n"
+                               "  const result: SerializedResult = new SerializedResult();\n"
+                               "  return result;\n"
+                               "}\n",
+                               CBM_LANG_TYPESCRIPT, "t", "serial.ts");
+    ASSERT_NOT_NULL(r);
+    ASSERT_FALSE(r->has_error);
+    for (int i = 0; i < r->defs.count; i++) {
+        if (strcmp(r->defs.items[i].name, "serialize") == 0) {
+            ASSERT_NOT_NULL(r->defs.items[i].body_tokens);
+            ASSERT(strstr(r->defs.items[i].body_tokens, "SerializedResult") != NULL);
+            break;
+        }
+    }
+    cbm_free_result(r);
+    PASS();
+}
+
 /* --- Lua --- */
 TEST(lua_function) {
     CBMFileResult *r = extract(
@@ -4462,6 +4481,7 @@ SUITE(extraction) {
     RUN_TEST(js_class);
     RUN_TEST(ts_function);
     RUN_TEST(ts_class);
+    RUN_TEST(body_tokens_type_identifier);
     RUN_TEST(lua_function);
     RUN_TEST(bash_function);
     RUN_TEST(perl_function);