# Compound V Debug

> Systematic debugging — reproduce, isolate, form hypotheses, instrument, fix, and add regression tests. Use when troubleshooting errors, failing tests, or unexpected behavior. Use when this capability is needed.

- Skill: `tomevault-io/compound-v-debug` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add tomevault-io/compound-v-debug`
- Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/compound-v-debug/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: tomevault-io (https://skillmd.com/u/tomevault-io)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/tomevault-io/compound-v-debug

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# Debug Skill

**Announce at start:** "Debugging: [symptom]. Following systematic debug workflow."

## When to use this skill

- runtime errors, flaky tests, wrong outputs
- "it used to work" regressions
- performance or timeout problems (initial triage)

## Debug workflow (do not skip steps)

1. **Reproduce**
   - Capture exact error, inputs, environment, command.
2. **Research** (parallel — invoke multiple tool calls in the same response)
   - Search the web for the exact error message or symptom.
   - Search the web for known issues in the relevant library/framework version (use `stack.md` versions).
   - Read related source files in parallel.
3. **Minimize**
   - Reduce to smallest repro (one file, one function, smallest dataset).
4. **Hypotheses (2–5)**
   - Rank by likelihood.
   - Investigate independent hypotheses in parallel where possible (e.g., check config + check logs + check deps simultaneously).
5. **Instrument**
   - Add temporary logging/assertions or use existing diagnostics.
6. **Fix**
   - Smallest change that removes root cause.
7. **Prevent**
   - Add regression test or permanent guard/validation.
8. **Verify**
   - Run the failing case + relevant suites.

## Reporting format

- Symptom
- Repro steps
- Root cause
- Fix
- Regression protection
- Verification

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