Conductor を Gemini CLI 拡張から Antigravity CLI のプラグインへ。spec.md と plan.md は動かさず、導入の前後だけ見比べる

#!/usr/bin/env python3
"""conductor/ の状態を JSON に残し、プラグイン導入の前後で差分を取る。"""
import hashlib
import json
import re
import sys
from pathlib import Path
 
CORE = ["product.md", "product-guidelines.md", "tech-stack.md", "workflow.md", "tracks.md"]
BOX = re.compile(r"^\s*[-*]\s*\[( |x|~)\]", re.M)  # [ ] 未着手 / [~] 作業中 / [x] 完了
 
 
def digest(p: Path) -> str:
    return hashlib.sha256(p.read_bytes()).hexdigest()[:12]
 
 
def snapshot(root: Path) -> dict:
    base = root / "conductor"
    out = {"missing_core": [c for c in CORE if not (base / c).exists()], "tracks": {}}
    for tdir in sorted((base / "tracks").glob("*/")) if (base / "tracks").exists() else []:
        entry = {"files": {}, "boxes": {" ": 0, "~": 0, "x": 0}}
        for name in ("spec.md", "plan.md", "metadata.json"):
            f = tdir / name
            entry["files"][name] = digest(f) if f.exists() else None
        plan = tdir / "plan.md"
        if plan.exists():
            for m in BOX.findall(plan.read_text(encoding="utf-8")):
                entry["boxes"][m] += 1
        out["tracks"][tdir.name] = entry
    listed = (base / "tracks.md").read_text(encoding="utf-8") if (base / "tracks.md").exists() else ""
    out["unlisted_tracks"] = [t for t in out["tracks"] if t not in listed]
    return out
 
 
def diff(a: dict, b: dict) -> list:
    msgs = []
    for t in sorted(set(a["tracks"]) | set(b["tracks"])):
        x, y = a["tracks"].get(t), b["tracks"].get(t)
        if x is None or y is None:
            msgs.append(f"{t}: {'追加' if x is None else '消失'}")
        elif x != y:
            changed = [n for n in x["files"] if x["files"][n] != y["files"][n]]
            msgs.append(f"{t}: 変更 {changed}")
    return msgs
 
 
if __name__ == "__main__":
    mode, root = sys.argv[1], Path(sys.argv[2])
    if mode == "save":
        snap = snapshot(root)
        Path(sys.argv[3]).write_text(json.dumps(snap, ensure_ascii=False, indent=1))
        print(f"tracks={len(snap['tracks'])} missing_core={snap['missing_core']} unlisted={snap['unlisted_tracks']}")
    elif mode == "compare":
        before = json.loads(Path(sys.argv[3]).read_text())
        msgs = diff(before, snapshot(root))
        print("\n".join(msgs) if msgs else "差分なし")
        sys.exit(1 if msgs else 0)

python3 conductor_snapshot.py save . before.json
# tracks=2 missing_core=[] unlisted=[]
 
python3 conductor_snapshot.py compare . before.json
# 差分なし
 
# plan.md の「作業中」を手で完了に変えたあと
python3 conductor_snapshot.py compare . before.json
# dark-mode_20261020: 変更 ['plan.md']   （終了コード 1）