cf-sys-debug SKILL.md skillA
cf-sys-debug from dinhanhthi/coding-friend is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add dinhanhthi/coding-friend/cf-sys-debug@git:20260909.6451e3dPins git:20260909.6451e3d in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- dinhanhthi/coding-friend
- Path
plugin-codex/skills/cf-sys-debug/SKILL.md- Versions recorded
- 7
- Latest version
- git:20260909.6451e3d, committed Sep 9, 2026
- First version recorded
- Jun 16, 2026
- Size
- 9,763 bytes
- Repository stars
- 4
- License
- MIT
Systematic 4-phase debugging — root cause, hypothesis testing, regression-guarded fix, mandatory bug doc. TRIGGER — non-trivial or recurring bugs: "still broken", "same error again", "came back", flaky/intermittent/race, "used to work, now broken", hard-to-reproduce, works locally but fails in CI, "find the root cause", "investigate", "diagnose", "why is this happening"; prefer over cf-fix once a fix has already failed. SKIP — trivial typos, one-line fixes, obvious config errors, or first-time…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Systematic Debugging
## Custom Guide
```!
bash "${PLUGIN_ROOT}/lib/load-custom-guide.sh" cf-sys-debug
```
If the block above printed anything, apply only the `## Before`, `## Rules`, and `## After` sections; if it shows the raw command instead of output, re-run that exact `load-custom-guide.sh` fence now.
## Core Constraint
**Do not touch code until you can state the root cause in one sentence:**
> "I believe the root cause is [X] because [evidence]."
Name a specific file, function, and line. Vague labels are not testable. If you cannot be that specific, you do not have a hypothesis yet.
**Same symptom after a fix = hard stop.** Recurrence or "let me just try this" means the hypothesis is unfinished. Re-read the execution path from scratch before touching code again.
**After 3 failed hypotheses, stop.** Use the Handoff Format below. Ask how to proceed.
## Rationalization Watch
Stop and re-examine when these surface:
| Thought | Rule |
| ----------------------------------- | ------------------------------------------------------------------- |
…Read the whole file at its exact version.
How to install
mdr add dinhanhthi/coding-friend/cf-sys-debug@sha256:ff3fd728ae71c7c1The line at the top of this page pins the label git:20260909.6451e3d, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_wgtei27aat3tt6my)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 7 versions of this file, between Jun 16, 2026 and Sep 9, 2026, about one every 14 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260909.6451e3d latest | 2026-09-09 | 6451e3d | 9,763 B | A | view · diff |
| git:20260909.3159673 | 2026-09-09 | 3159673 | 9,734 B | A | view · diff |
| git:20260827.d3037e2 | 2026-08-27 | d3037e2 | 10,118 B | A | view · diff |
| git:20260827.45d78ea | 2026-08-27 | 45d78ea | 10,178 B | A | view · diff |
| git:20260827.debd979 | 2026-08-27 | debd979 | 15,281 B | A | view · diff |
| git:20260704.bf827bf | 2026-07-04 | bf827bf | 15,752 B | A | view · diff |
| git:20260616.1072055 | 2026-06-16 | 1072055 | 15,647 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 (9763 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
dinhanhthi/coding-friend · 4 stars · license MIT · pushed 2026-11-08 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_wgtei27aat3tt6my GET https://markdownregistry.com/api/v1/resolve?ref=dinhanhthi/coding-friend/cf-sys-debug GET https://markdownregistry.com/api/v1/blob/ff3fd728ae71c7c196df58cdb7d091722a4e7d232d68f20c1f24531393956613
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
More from dinhanhthi/coding-friend
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