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diagnosing-bugs SKILL.md skillA

diagnosing-bugs from marcellocurto/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add marcellocurto/skills/diagnosing-bugs@git:20261029.444423a

Pins git:20261029.444423a in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: marcellocurto/skills
Path: skills/diagnosing-bugs/SKILL.md
Versions recorded: 7
Latest version: git:20261029.444423a, committed Oct 29, 2026
First version recorded: Aug 20, 2026
Size: 11,687 bytes
Repository stars: 3
License: none declared

Reproduce, isolate, and fix difficult bugs or performance regressions. Use when a bug, failure, or slowdown has no obvious cause, or when a first fix did not work.

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

# Diagnosing Bugs

Diagnose hard bugs by combining reproduction, code inspection, provisional hypotheses, and targeted probes. Choose the next step by the evidence missing; the sections below are tools for the investigation, not gates that must be completed in order.

When exploring the codebase, read the project's glossary if it exists, whatever its filename, to get a clear mental model of the relevant modules, and check ADRs in the area you're touching.

## Redact

This skill has you show commands, outputs and captured artifacts. **Redact every secret first**: write `<REDACTED>` in its place. Build loops against env vars, so the credential stays in the environment rather than in what you show. Captured artifacts carry auth headers: quote only the lines that carry the signal, scrub secrets from any trace before saving it to disk, and keep saved traces outside the repository.

If the redacted output is not enough to diagnose the bug, say so and ask the user.

## Build a feedback loop
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add marcellocurto/skills/diagnosing-bugs@sha256:2c090a0c7137a3b9

The line at the top of this page pins the label git:20261029.444423a, 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.

Badge

[![mdr](https://markdownregistry.com/badge/art_cchb32h6i42doyil.svg)](https://markdownregistry.com/a/art_cchb32h6i42doyil)

2 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 7 versions of this file, between Aug 20, 2026 and Oct 29, 2026, about one every 12 days.

version	committed	commit	size	audit
git:20261029.444423a latest	2026-10-29	444423a	11,687 B	A	view · diff
git:20261002.a2929d4	2026-10-02	a2929d4	11,594 B	A	view · diff
git:20260910.e524acd	2026-09-10	e524acd	11,199 B	A	view · diff
git:20260906.ccd7ead	2026-09-06	ccd7ead	10,137 B	A	view · diff
git:20260820.df9ee34	2026-08-20	df9ee34	8,932 B	A	view · diff
git:20260820.8432c7a	2026-08-20	8432c7a	9,018 B	A	view · diff
git:20260820.df45810	2026-08-20	df45810	8,529 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (11687 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

GitHub

marcellocurto/skills · 3 stars · license none declared · pushed 2026-10-29 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_cchb32h6i42doyil
GET https://markdownregistry.com/api/v1/resolve?ref=marcellocurto/skills/diagnosing-bugs
GET https://markdownregistry.com/api/v1/blob/2c090a0c7137a3b9d62b62a2292531accedcba90a63584b9455d94c11067cc4f

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.