writing-checks skillA
writing-checks is agent-read markdown (skill) from wangchangxin0809/cc-repo-harness: Enforce a convention with machinery instead of prose: PreToolUse guards that refuse an action before it runs, gates that judge the worktree in CI, selftests that prove a check can turn red, layering tests. Use when a written rule keeps being violated, when adding any lint or CI step, when asked to protect a branch or stop a destructive command, or when a check exists that nobody has seen fail..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# Guards and gates Governs: shared/scripts/guards/, shared/scripts/gates/ Two mechanisms, one discipline. A **guard** reads one proposed action before it runs and may block it. A **gate** reads the worktree at CI time and may fail the build. Everything below applies to both, because the failure modes are the same. | | Guard | Gate | |---|---|---| | Sees | one tool call, as JSON on stdin | the whole tree | | Cost | every matching call | once per run | | Use when | the action is irreversible | the state is detectable | | Failure | exit 2, stderr goes to the model | non-zero, output goes to a human | ## A guard is a speed bump, not a boundary Say this out loud before writing one, because the rest of this skill reads like a promise it cannot keep. A guard matches the *text* of a proposed command: ``` git push origin main | tail -5 BLOCKED B=push; git $B origin main | tail -5 allowed ``` It also fails open on purpose — a broken guard must not become an unbypassable wall — so its coverage is best-effort in two independent directions. That is the right trade for what a guard is actually for: catching the thing you were about …
Read the whole file at its exact version.
How to install
mdr add wangchangxin0809/cc-repo-harness/writing-checks@git:20260903.c1a383cmdr add wangchangxin0809/cc-repo-harness/writing-checks@sha256:1090068d9a82f028Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_dr5caoc2orlnv2x6)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260903.c1a383c latest | 2026-09-03 | c1a383c | 12,503 B | A | view · diff |
| git:20260902.801d609 | 2026-09-02 | 801d609 | 12,636 B | A | view · diff |
| git:20260902.653e3d0 | 2026-09-02 | 653e3d0 | 12,631 B | A | view · diff |
| git:20260901.a1c3abe | 2026-09-01 | a1c3abe | 12,358 B | A | view · diff |
| git:20260831.21be719 | 2026-08-31 | 21be719 | 12,314 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (12503 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
wangchangxin0809/cc-repo-harness · 5 stars · license MIT · pushed 2026-09-23 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_dr5caoc2orlnv2x6 GET https://markdownregistry.com/api/v1/resolve?ref=wangchangxin0809/cc-repo-harness/writing-checks GET https://markdownregistry.com/api/v1/blob/1090068d9a82f02861457a5fd25557bcb71c0e9ad14fcb649d2f05c86126c4bb
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