refactor(semantic): port src/semantic from C to Zig

Makefile.cbm

@@ -194,8 +194,8 @@ PIPELINE_SRCS = \
 
 # SimHash / MinHash, watcher and git context modules are Zig: see CBM_ZIG_SRC.
 
-# Semantic embedding module
-SEMANTIC_SRCS = src/semantic/semantic.c src/semantic/ast_profile.c src/semantic/rotsq.c
+# Semantic embedding module: implemented in Zig (src/semantic/*.zig, part of libcbm_zig)
+SEMANTIC_SRCS =
 
 # nomic-embed-code pretrained vectors (assembler blob)
 UNIXCODER_BLOB_SRC = vendored/nomic/code_vectors_blob.S
@@ -479,6 +479,10 @@ CBM_ZIG_SRCS = $(CBM_ZIG_SRC) src/cbm_zig_c.h src/cli_zig/cbm_cli_zig.zig src/cl
                src/discover/discover.h src/discover/userconfig.h \
                src/git/git_context.zig src/git/git_context.h \
                src/graph_buffer/graph_buffer.zig src/graph_buffer/graph_buffer.h \
+               src/semantic/ast_profile.zig src/semantic/fp.zig src/semantic/rotsq.zig \
+               src/semantic/semantic.zig \
+               src/semantic/ast_profile.h src/semantic/rotsq.h src/semantic/semantic.h \
+               vendored/nomic/code_vectors.h vendored/nomic/code_tokens.h \
                src/simhash/minhash.zig src/simhash/minhash.h \
                src/store/store.zig src/store/store.h \
                src/watcher/watcher.zig src/watcher/watcher.h \

build.zig

@@ -564,9 +564,6 @@ const native_sources = [_][]const u8{
     "src/pipeline/pass_complexity.c",
     "src/pipeline/pass_importance.c",
     "src/pipeline/pass_pkgmap.c",
-    "src/semantic/semantic.c",
-    "src/semantic/ast_profile.c",
-    "src/semantic/rotsq.c",
     "vendored/yyjson/yyjson.c",
     "internal/cbm/cbm.c",
     "internal/cbm/extract_defs.c",

scripts/extract_nomic_vectors.py

@@ -520,7 +520,7 @@ def main():
     print()
     print("next steps:")
     print(f"  1. update Makefile.cbm: change UNIXCODER_BLOB_SRC path to vendored/nomic/")
-    print(f"  2. update #include in semantic.c: \"vendored/nomic/code_vectors.h\"")
+    print(f"  2. update #include in src/cbm_zig_c.h: \"nomic/code_vectors.h\"")
     print(f"  3. arch -arm64 make -j12 -f Makefile.cbm clean-c && arch -arm64 make -j12 -f Makefile.cbm")
 
 

src/cbm_zig.zig

@@ -61,6 +61,9 @@ comptime {
     checkExports(@import("mcp/project_tools.zig"));
     checkExports(@import("mcp/search_tools.zig"));
     checkExports(@import("mcp/server.zig"));
+    checkExports(@import("semantic/ast_profile.zig"));
+    checkExports(@import("semantic/rotsq.zig"));
+    checkExports(@import("semantic/semantic.zig"));
     checkExports(@import("simhash/minhash.zig"));
     checkExports(@import("store/store.zig"));
     checkExports(@import("watcher/watcher.zig"));

src/cbm_zig_c.h

@@ -92,9 +92,9 @@
 #include "foundation/compat_fs_internal.h"
 #include "foundation/yaml.h"
 #include "mcp/mcp.h"
+#include "nomic/code_vectors.h"
 #include "pipeline/pipeline.h"
 #include "pipeline/worker_pool.h"
-#include "semantic/semantic.h"
 #include "store/store.h"
 #include "tree_sitter/api.h"
 #include "zova/cbm_zova.h"
@@ -139,6 +139,8 @@ static inline FILE *cbm_zig_stderr(void) {
 #include "git/git_context.h"
 #include "graph_buffer/graph_buffer.h"
 #include "mcp/index_supervisor.h"
+#include "semantic/ast_profile.h"
+#include "semantic/semantic.h"
 #include "simhash/minhash.h"
 #include "watcher/watcher.h"