app-bug-forensics SKILL.md skillA
app-bug-forensics from sidiangongyuan/codex-skills-library is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add sidiangongyuan/codex-skills-library/app-bug-forensics@git:20260712.ef71354Pins git:20260712.ef71354 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- sidiangongyuan/codex-skills-library
- Path
skills/app-bug-forensics/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260712.ef71354, committed Jul 12, 2026
- Size
- 4,339 bytes
- Repository stars
- 24
- License
- MIT
Use when diagnosing or fixing user-reported application bugs. Guides evidence-backed root-cause analysis from symptoms, screenshots, logs, provider failures, background tasks, storage, or desktop lifecycle behavior through a scoped patch and regression tests.
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
# App Bug Forensics
Use this skill when a user reports a bug, screenshot, intermittent failure, or
confusing app behavior. The goal is root cause first, patch second.
## Workflow
1. Preserve the symptom.
- Identify the exact screen, action sequence, visible message, and affected
data scope.
- Inspect screenshots and logs when available.
- Do not assume the visible error string names the real failing component.
2. Trace the path.
- Follow the request from UI event to state store, API client, backend route,
persistence, sidecar/process boundary, and external provider when relevant.
- Search for all places that can set the visible error state.
- Check whether the failing request still belongs to the current selection.
- For AI failures, identify the exact provider, model, transport, profile,
credential source, timeout, and whether the request reached the provider.
3. Classify likely root cause.
- Stale async request or route watcher race.
- Frontend/backend version mismatch or old sidecar process.
- Missing optional capability being treated as fatal.
- Provider protocol, model, key, base URL, or auth mismatch.
…Read the whole file at its exact version.
How to install
mdr add sidiangongyuan/codex-skills-library/app-bug-forensics@sha256:a7dcf71b5b0ed9c9The line at the top of this page pins the label git:20260712.ef71354, 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_fszepcddisrl2v2t)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 12, 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 (4339 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
sidiangongyuan/codex-skills-library · 24 stars · license MIT · pushed 2026-09-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_fszepcddisrl2v2t GET https://markdownregistry.com/api/v1/resolve?ref=sidiangongyuan/codex-skills-library/app-bug-forensics GET https://markdownregistry.com/api/v1/blob/a7dcf71b5b0ed9c930cf47a44d6a4aea100d2ab57189d639587a626cc06559e9
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.