Find the smallest reproducible cause of a bug and verify the fix.
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
# Debugging skill
1. Reproduce the reported behavior before editing. Inspect the call path and relevant tests.
2. Write down the expected behavior and the observed behavior; do not confuse symptoms with the root cause.
3. Prefer a focused fix with a regression test. Do not broadly rewrite unrelated code to hide a failing check.
4. Run the narrowest relevant test, then the wider project checks when practical.
5. If you cannot reproduce a bug, explain what you inspected and what evidence is missing.
6. Never claim a fix is verified unless a relevant command completed successfully.
The line at the top of this page pins the label git:20261027.afafa89, 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.
GET https://markdownregistry.com/api/v1/artifacts/art_7oa4l5fgzsotzl7b
GET https://markdownregistry.com/api/v1/resolve?ref=fahthiz/oasis/debugging
GET https://markdownregistry.com/api/v1/blob/2bfe77d1e473e599f9cd5e92cdd026b4ff109ed90211a0d2351548ecbf226946
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fahthiz/oasis · evals/snapshots/oasis-main/skills/environment-setup/SKILL.md · Detect the environment and install or configure the smallest set of tools required by a task.
fahthiz/oasis · evals/snapshots/oasis-main/skills/ship-feature/SKILL.md · Implement a complete feature from requirement through tests and honest delivery notes.
fahthiz/oasis · plugins/oasis-research/skills/deep-research/SKILL.md · Multi-source web and code research with source verification, conflicting-evidence checks, and cited reporting. Use for…
fahthiz/oasis · skills/api-development/SKILL.md · Design and implement validated, authenticated APIs with clear error contracts and safe lifecycle handling.
fahthiz/oasis · skills/code-review/SKILL.md · Review current changes for correctness, security, performance, accessibility, regressions, and test gaps.
code-yeongyu/oh-my-openagent · packages/shared-skills/skills/debugging/SKILL.md · Runs a hypothesis-driven debugging loop across any language or binary, escalating to orthogonal oracle angles and…
romiluz13/cc10x · plugins/cc10x/skills/debugging/SKILL.md · Use when diagnosing a defect or regression: feedback loop FIRST, root cause before fix,
blast radius after fix. Covers…
