phx-investigate
Investigate Elixir/Phoenix bugs root-cause first. Reproduce failures, cite evidence, and use optional native OpenCode subagents only when useful.
npx skills add oliver-kriska/claude-elixir-phoenix --skill phx-investigate --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# Investigate Bug Investigate Elixir/Phoenix bugs root-cause first. Reproduce or establish the failing behavior before recommending a fix, and cite concrete paths and lines. ## Usage ```text /phx-investigate Users can't log in after password reset /phx-investigate FunctionClauseError in UserController.show /phx-investigate Complex auth bug --parallel ``` Treat the text after the skill name as the bug description. `--parallel` asks for independent investigation tracks when native OpenCode subagent tooling is available; it is an optimization, never a requirement. ## Iron Laws 1. **Read the error literally first** — extract the exception, message, failing assertion, and first relevant application frame before theorizing. 2. **Check the obvious before going deep** — compile errors, missing migrations, atom/string mismatches, nil values, stale servers, and changeset errors explain many failures. 3. **Reproduce before proposing a fix** — run the smallest relevant test or controlled command and record its output. If reproduction is impossible, state exactly what evidence establishes the failure instead. 4. **Confirm the root cause with evidence** — distinguish the observed failure, the ca
- Usage
- Iron Laws
- Workflow
- 1. Consult Existing Evidence
- 2. Capture Runtime Context When Available
- 3. Run Sanity Checks
- 4. Reproduce Before Fixing
- 5. Check the Obvious
- 6. Trace and Test the Hypothesis
- 7. Report
- References
mix compile --warnings-as-errors mix test test/path_test.exs --trace
What does the phx-investigate skill do?
Investigate Elixir/Phoenix bugs root-cause first. Reproduce failures, cite evidence, and use optional native OpenCode subagents only when useful.
How do I install it?
Run `npx skills add oliver-kriska/claude-elixir-phoenix --skill phx-investigate --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From oliver-kriska/claude-elixir-phoenix, a repository with 515 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.