sync: WIN-BOWEI 2026-08-10 硬编码审计：两个 flow driver 的工程根改读 skills_env.md

- run_fpga_local.py: FPGA_FLOW_ROOT 写死 E:\LangGraph_Design\fpga-goldenref-flow
  -> _env_lookup(FPGA_GOLDENREF_ROOT)，未配置时给出明确提示。
- run_imx6_flow.py: DEFAULT_PROJECT 写死 -> _env_lookup(FPGA_IMX6_FLOW_ROOT)，
  --project-dir 为空时报错而不是拿错路径继续。
与 sim-rtl-flow / zynq-imx6-flow 已有写法一致。

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

fpga-goldenref-flow/scripts/run_fpga_local.py

@@ -18,14 +18,42 @@ removed). CLI + exit codes:
 Exit codes: 0 complete · 1 error · 2 interrupted (human action needed)
 """
 import os
+import re
 import sys
 import json
 import uuid
 import argparse
 import sqlite3
 
+
+def _env_lookup(key, default=None):
+    """Read KEY from the OS environment, else from a ``KEY = value`` line in
+    ~/skills_env.md. Machine-local paths are never hardcoded in a skill; see
+    the same helper in fpga_flash/scripts/vivado_env.py."""
+    value = os.environ.get(key)
+    if value:
+        return value
+    path = os.path.join(os.path.expanduser("~"), "skills_env.md")
+    try:
+        with open(path, encoding="utf-8") as handle:
+            for line in handle:
+                match = re.match(rf"\s*{re.escape(key)}\s*=\s*(.+?)\s*(?:#.*)?$", line)
+                if match:
+                    found = match.group(1).strip()
+                    if found and not found.startswith("<"):
+                        return found
+    except OSError:
+        pass
+    return default
+
+
 # Drive the graph in-process: import the app package.
-FPGA_FLOW_ROOT = r"E:\LangGraph_Design\fpga-goldenref-flow"
+FPGA_FLOW_ROOT = _env_lookup("FPGA_GOLDENREF_ROOT")
+if not FPGA_FLOW_ROOT:
+    raise SystemExit(
+        "fpga-goldenref-flow 工作流仓库路径未配置：请在 ~/skills_env.md 增加\n"
+        "  FPGA_GOLDENREF_ROOT = <fpga-goldenref-flow 检出目录>"
+    )
 if FPGA_FLOW_ROOT not in sys.path:
     sys.path.insert(0, FPGA_FLOW_ROOT)