debug SKILL.md skillA
debug from genai-io/san is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add genai-io/san/debug@git:20260717.120e9bbPins git:20260717.120e9bb in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- genai-io/san
- Path
.san/personas/software-engineer/skills/debug/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260717.120e9bb, committed Jul 17, 2026
- Size
- 2,889 bytes
- Repository stars
- 147
- License
- Apache-2.0
Systematic debugging that finds the root cause before changing any code — collect symptoms, trace the code path, check what changed, reproduce deterministically, form a testable hypothesis, then fix the cause (not the symptom) and prove it with a regression test. Use when the user reports a bug, a crash, a failing test, or says "debug", "why is this happening", "root cause".
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
# Debug: root cause before fix **The iron law: no fix without a root cause first.** Patching a symptom you don't understand turns one bug into whack-a-mole — every blind fix makes the next bug harder to find. Find why it breaks, then fix that. ## Phase 1: Investigate Gather evidence before forming any hypothesis. 1. **Collect the symptoms.** Read the exact error, stack trace, and the steps that trigger it. If you don't have enough to reproduce, ask the user one precise question at a time — don't guess your way forward. 2. **Trace the code path.** From the symptom, work backward toward possible causes: `Grep` for the call sites, `Read` the logic. Understand what the code actually does before theorizing about why it's wrong. 3. **Check what changed.** `git log --oneline -20 -- <affected files>` and read the recent diffs. If it worked before, the cause is almost certainly in a change — a regression narrows the search to the diff. 4. **Reproduce it deterministically.** Get to a command or test that fails every time. If you can't reproduce it reliably, you don't yet understand it — gather …
Read the whole file at its exact version.
How to install
mdr add genai-io/san/debug@sha256:b2557159d9e3c5ffThe line at the top of this page pins the label git:20260717.120e9bb, 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_ci2voyhty2xftoxv)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 17, 2026.
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 (2889 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
genai-io/san · 147 stars · license Apache-2.0 · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_ci2voyhty2xftoxv GET https://markdownregistry.com/api/v1/resolve?ref=genai-io/san/debug GET https://markdownregistry.com/api/v1/blob/b2557159d9e3c5ffa4b476b2528d7251b4c0e93ad6155f199726a6216ec0495d
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.