参考所有分组，完成尽量多的内容：锁定RS274源码映射结论

结论：补齐 WASM header、blocked-header、metadata 的 source map 文档闭环，并把 manifest/source-map 同步检查接入 native 必跑路径；未扩展 smoke 功能。

check-linuxcnc-rs274-source-map.sh

@@ -0,0 +1,80 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+cd "$(dirname "$0")"
+
+# LinuxCNC source basis: this guard keeps the local source map aligned with the
+# LinuxCNC-root relative rs274 manifests that drive native and WASM source-link
+# probes. It validates documentation/manifest drift only; it does not interpret
+# CNC behavior.
+python3 - <<'PY'
+from pathlib import Path
+
+source_map = Path("docs/linuxcnc-rs274-source-map.md").read_text(encoding="utf-8")
+native_manifest = Path("linuxcnc-rs274-source-files.txt").read_text(encoding="utf-8").splitlines()
+wasm_manifest = Path("linuxcnc-rs274-wasm-source-files.txt").read_text(encoding="utf-8").splitlines()
+
+expected = {
+    "### Interpreter core": [
+        Path(line.split(":", 2)[1]).name
+        for line in native_manifest
+        if line.startswith("core:")
+    ],
+    "### Python binding modules": [
+        Path(line.split(":", 2)[1]).name
+        for line in native_manifest
+        if line.startswith("binding:")
+    ],
+    "### WASM-safe source core": [
+        line.split(":", 2)[1]
+        for line in wasm_manifest
+        if line.startswith("core:")
+    ],
+    "### WASM-blocked sources": [
+        line.split(":", 2)[1]
+        for line in wasm_manifest
+        if line.startswith("blocked:")
+    ],
+    "### WASM-tracked headers": [
+        line.split(":", 2)[1]
+        for line in wasm_manifest
+        if line.startswith("header:")
+    ],
+    "### WASM-blocked headers": [
+        line.split(":", 2)[1]
+        for line in wasm_manifest
+        if line.startswith("blocked-header:")
+    ],
+    "### WASM metadata sources": [
+        line.split(":", 2)[1]
+        for line in wasm_manifest
+        if line.startswith("metadata:")
+    ],
+}
+
+actual = {section: [] for section in expected}
+active_section = None
+for line in source_map.splitlines():
+    if line in expected:
+        active_section = line
+        continue
+    if active_section and line.startswith("### "):
+        active_section = None
+    if active_section and line.startswith("- `"):
+        actual[active_section].append(line.split("`", 2)[1])
+
+labels = {
+    "### Interpreter core": "interpreter core",
+    "### Python binding modules": "Python binding module",
+    "### WASM-safe source core": "WASM-safe source core",
+    "### WASM-blocked sources": "WASM-blocked source",
+    "### WASM-tracked headers": "WASM-tracked header",
+    "### WASM-blocked headers": "WASM-blocked header",
+    "### WASM metadata sources": "WASM metadata source",
+}
+for section, expected_entries in expected.items():
+    if actual[section] != expected_entries:
+        raise SystemExit(
+            f"docs/linuxcnc-rs274-source-map.md {labels[section]} list no longer matches source manifest"
+        )
+PY