gate-switch — Claim-Verification Gate Engine / 声称即核验门禁引擎

English: LLM agents routinely claim "tests passed" / "file written" / "synced" without actually doing it. gate-switch takes the verdict out of the model's hands: you declare what must be true as a spec JSON (file exists, min size, JSON field value, glob count, grep count, mtime freshness, script exit code), and the engine mechanically checks every item. All pass → verdict A (proceed). Any failure → verdict B with a violation list that doubles as the fix instruction. Every flip is logged to an append-only JSONL ledger for later audit.

中文：治 LLM 三类顽疾——该做的没做、缺斤短两、伪造声称。把"声称 X 已满足"写成检查项 spec JSON，引擎逐项机械核验：全过→判 A 放行；任一失败→判 B 阻断并列出违例（violations 即修复指令）。判定权收归机械门禁，模型只能照抄结论。全程留痕 ~/.agents/logs/gate_switch.jsonl，供复盘审计。

Install / 安装

cp -R gate-switch ~/.agents/skills/   # Kimi Code skills directory / 技能目录

Zero dependencies (pure Python stdlib). / 零依赖（纯 Python 标准库）。

Usage / 用法

python3 ~/.agents/skills/gate-switch/scripts/gate_switch.py --spec <spec.json> [--set key=value ...]

Exit codes / 退出码：0=A all checks passed / 全部通过放行 · 2=B violations block / 有违例阻断 · 3=CLARIFY insufficient input / 信号不足 · 4=VIOLATION illegal spec / spec 非法。

Bundled specs / 自带两个通用 spec

• zero_residual — prove a pattern is gone: rename cleanups, rollback residue, forbidden >/dev/null silencers. 零残留核验（改名/回滚/禁令兜底）。
• no_abs_path — zero hardcoded /Users/* absolute paths in living code. 活体代码零绝对路径硬编码。

python3 ~/.agents/skills/gate-switch/scripts/gate_switch.py \
  --spec ~/.agents/skills/gate-switch/scripts/specs/zero_residual.json \
  --set "pattern=<正则>" --set "path=<目标glob>"

python3 ~/.agents/skills/gate-switch/scripts/gate_switch.py \
  --spec ~/.agents/skills/gate-switch/scripts/specs/no_abs_path.json \
  --set src=<项目根>

spec format / spec 格式

{
  "gate": "gate-name",
  "desc": "what A/B mean / A/B 语义",
  "checks": [
    {"type": "file_exists",   "path": "...", "label": "..."},
    {"type": "file_min_size", "path": "...", "bytes": 100},
    {"type": "json_field",    "path": "...", "field": "a.b.0.c", "op": "exists|not_empty|equals|in|min_len|min|max", "value": 0},
    {"type": "glob_count",    "pattern": "...", "op": "min|max|eq", "value": 1},
    {"type": "grep_count",    "pattern": "...", "path": "...", "op": "min|max|eq", "value": 1},
    {"type": "mtime_after",   "path": "...", "ref_path": "..."},
    {"type": "script_exit",   "cmd": "...", "expect": 0}
  ]
}

{key} placeholders are injected via --set key=value. New scenario = new spec; the engine never changes. / {key} 占位符由 --set 注入；新场景 = 写新 spec，引擎零改动。

templates/ contains reusable gate-skeleton templates (L3 framework gate / CLAIM-GATE). / templates/ 附两个可克隆的闸骨架模板。

License: MIT-0 (attribution optional). / 许可证：MIT-0（署名可选）。