investigate SKILL.md skillA

investigate from oliver-kriska/claude-elixir-phoenix is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned
mdr add oliver-kriska/claude-elixir-phoenix/investigate@git:20260929.c08ad14

Pins git:20260929.c08ad14 in mdr.lock. Pin the fingerprint instead.

Audit grade
A, 17 of 17 checks passed
Kind
SKILL.md skill
Repository
oliver-kriska/claude-elixir-phoenix
Path
plugins/elixir-phoenix/skills/investigate/SKILL.md
Versions recorded
7
Latest version
git:20260929.c08ad14, committed Sep 29, 2026
First version recorded
Apr 3, 2026
Size
5,636 bytes
Repository stars
572
License
MIT

Find the root cause of Elixir/Phoenix bugs — crashes, exceptions, stack traces, compile errors, LiveView that won't update, silent failures. Use when something is broken or misbehaves. --parallel for 4 tracks.

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

# Investigate Bug

Investigate bugs using the Ralph Wiggum approach: check the
obvious, read errors literally.

## Usage

```
/phx:investigate Users can't log in after password reset
/phx:investigate FunctionClauseError in UserController.show
/phx:investigate Complex auth bug --parallel
```

## Arguments

`$ARGUMENTS` = Bug description or error message. Add `--parallel`
for deep 4-track investigation.

## Mode Selection

Use **parallel mode** (spawn `deep-bug-investigator`) when:
bug mentions 3+ modules, spans multiple contexts, is intermittent
or involves concurrency, or user says `--parallel`/`deep`.

Before spawning it, determine the effective maximum nesting depth. Use an
explicit positive-integer `CLAUDE_CODE_MAX_SUBAGENT_SPAWN_DEPTH` value first;
when it is unset, inspect `claude --version` (the default is 1 in 2.1.217–2.1.218
and 3 in 2.1.219+). If the version is unavailable, conservatively use 1. At
depth 3+, use the `deep-bug-investigator` orchestrator. At depth 1 or 2, keep
orchestration in this main session: spawn the four
focused tracks (reproduction, root cause, impact, fix strategy) directly in
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint
mdr add oliver-kriska/claude-elixir-phoenix/investigate@sha256:0cca36282769645d

The line at the top of this page pins the label git:20260929.c08ad14, 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 badge

[![mdr](https://markdownregistry.com/badge/art_z3msyt6wto5okpk4.svg)](https://markdownregistry.com/a/art_z3msyt6wto5okpk4)

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

Versions

The registry has recorded 7 versions of this file, between Apr 3, 2026 and Sep 29, 2026, about one every 30 days.

versioncommittedcommitsizeaudit
git:20260929.c08ad14 latest2026-09-29 c08ad14 5,636 BA view · diff
git:20260921.69af5df2026-09-21 69af5df 5,669 BA view · diff
git:20260725.7df3e512026-07-25 7df3e51 5,626 BA view · diff
git:20260724.918f8092026-07-24 918f809 5,429 BA view · diff
git:20260611.6d293642026-06-11 6d29364 4,991 BA view · diff
git:20260403.f1fc4942026-04-03 f1fc494 4,652 BA view · diff
git:20260403.be7aa862026-04-03 be7aa86 4,683 BA 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 (5636 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

oliver-kriska/claude-elixir-phoenix · 572 stars · license MIT · pushed 2026-11-02 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_z3msyt6wto5okpk4
GET https://markdownregistry.com/api/v1/resolve?ref=oliver-kriska/claude-elixir-phoenix/investigate
GET https://markdownregistry.com/api/v1/blob/0cca36282769645de7e36b34d7382baf4f131c4c16110f8a1583fa6fc6dddee5

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.

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