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Agent skill

Phx Compound

by oliver-kriska in oliver-kriska/claude-elixir-phoenix

Capture solved problems as searchable solution docs. An agent skill from oliver-kriska/claude-elixir-phoenix.

MITAuto-check passedSecurity

Install Phx Compound

skills CLI
$ npx skills add oliver-kriska/claude-elixir-phoenix --skill phx-compound -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install oliver-kriska/claude-elixir-phoenix phx-compound --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/oliver-kriska/claude-elixir-phoenix.git skills-src && mkdir -p .claude/skills && cp -r skills-src/targets/amp/skills/phx-compound .claude/skills/phx-compound && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
phx-compound
GitHub stars
565
Token cost
~929 tokens
SKILL.md length
392 words
Files
2 (incl. references)
Skills in repo
111
Repo updated
First seen
Licence
MIT

At a glance

Capture solved problems as searchable solution docs. An agent skill from oliver-kriska/claude-elixir-phoenix.

  • Works in 4 steps: Detect Context → Search Existing Solutions → Gather Details and Create Solution → …
  • Security work in your project
  • SKILL.md covers Usage, Philosophy, Workflow and Auto-Trigger Phrases, plus 3 more sections
  • Calls git

What it does

Phx Compound is an agent skill from oliver-kriska/claude-elixir-phoenix. Capture solved problems as searchable solution docs. Use after fixing bugs, when "that worked", or after successful phx-review or phx-investigate.

Its SKILL.md is about 930 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/compound-workflow.md`).

It sits in Security. The repository describes itself as: Claude Code plugin for Elixir/Phoenix/LiveView — 26 specialist agents, Iron Laws enforcement, and Tidewave MCP integration. Plan features with parallel research agents, execute… The licence is MIT.

When your agent uses it

  • Security work in your project

Example prompts

  • “that worked”
  • “/phx-compound”

Workflow steps

4 steps, taken from the step headings in SKILL.md.

  1. Detect Context
  2. Search Existing Solutions
  3. Gather Details and Create Solution
  4. Decision Menu

What it can do on your machine

Read from SKILL.md and the folder at commit 9767a82. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • git

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md. Its commands use git, which can reach the network depending on how they are called.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Phx Compound loads about 929 tokens when it runs, and up to ~1.8k if it reads all its reference files. Until then it costs about 40 tokens; SKILL.md has 392 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~40
When it runs · the whole SKILL.md, loaded when a task matches
~929
With references · SKILL.md plus every file in references/, read only if the agent opens them
~1.8k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from oliver-kriska/claude-elixir-phoenix at commit 9767a82, republished under its MIT licence (© oliver-kriska). 392 words, ~929 tokens.

Download SKILL.mdSave it as .claude/skills/phx-compound/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.
name
phx-compound
description
Capture solved problems as searchable solution docs. Use after fixing bugs, when "that worked", or after successful phx-review or phx-investigate.

Compound — Capture Solutions as Knowledge

After fixing a problem, capture the solution as searchable institutional documentation.

Usage

phx-compound Fixed N+1 query in user listing
phx-compound Resolved LiveView timeout in dashboard
phx-compound   # Auto-detects from recent session context

Philosophy

Each unit of engineering work should make subsequent units easier — not harder.

Workflow

Step 1: Detect Context
  1. If $ARGUMENTS provided, use as description
  2. If no args, check scratchpad DEAD-END/DECISION entries, git diff, .claude/plans/{slug}/progress.md for recent completions
  3. If unclear, ask: "What problem did you just solve?"

Only document non-trivial problems that required investigation.

Step 2: Search Existing Solutions

Create .claude/solutions/ directory if it doesn't exist (run mkdir -p .claude/solutions). Then search .claude/solutions/ for relevant keywords using Grep.

If found: Create new (different root cause), Update existing (same root cause, new symptom), or Skip.

Step 3: Gather Details and Create Solution

Extract from session context: module, symptoms, investigation steps, root cause, solution code, and prevention advice.

Validate frontmatter against ../compound-docs/references/schema.md, then create file using ../compound-docs/references/resolution-template.md.

Write-blocked fallback: if writing to .claude/solutions/ is denied by permissions, do NOT silently drop the solution. Output the full solution doc inline (fenced markdown the user can paste), then suggest phx-permissions to allow .claude/solutions/ writes for next time.

Step 4: Decision Menu
  1. Continue (default)
  2. Promote to Iron Law check — Add to iron-law-judge
  3. Update skill reference — Add to relevant skill
  4. Update CLAUDE.md — Add prevention rule

Auto-Trigger Phrases

When user says "that worked", "it's fixed", "problem solved", "the fix was" — suggest phx-compound.

Show full SKILL.md (164 more words)Show less
Supply-chain finding auto-feed (Phase 3)

When phx-deps-audit produces a BLOCK-severity finding that the user investigates and confirms is a real malicious pattern (not a false positive), suggest:

Caught a high-severity finding in <pkg>@<version>. Run phx-compound to capture this for future audits?

If accepted, the resulting solution doc goes to .claude/solutions/supply-chain/<pkg>-<cve_or_pattern>.md and includes the exact rule-id + snippet + diff window that triggered the finding. This compounds the audit corpus: future runs of phx-deps-audit grep solutions/supply-chain/ for snippet matches and pre-elevate severity on known-bad patterns.

Always prompt; never auto-write. Solution docs are durable and shape future trust calls — the user reviews before committing.

Iron Laws

  1. YAML frontmatter validates or STOP
  2. Symptoms must be specific — not "it broke"
  3. Root cause is WHY, not WHAT
  4. One problem per file
  5. NEVER document a fix before verifying it works — run mix compile && mix test first; unverified solutions poison the knowledge base

Integration with Workflow

text
phx-review → Complete → phx-compound  ← YOU ARE HERE
                              │
                 .claude/solutions/{category}/{fix}.md
                              │
              phx-investigate and phx-plan search here

References

  • references/compound-workflow.md — Detailed step-by-step
  • See also: compound-docs skill for schema and templates

© oliver-kriska, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 1 other file (references) in targets/amp/skills/phx-compound of oliver-kriska/claude-elixir-phoenix.

  • SKILL.md
  • references/compound-workflow.md

Open the folder on GitHubat commit 9767a82

Compare with similar skills

Phx Compound next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Phx Compound compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Phx Compound this skilloliver-kriska/claude-elixir-phoenix565—~929Automated safety check: PassMIT
Fla Ascend Performancefla-org/flash-linear-attention5.8k—~6.3kAutomated safety check: PassMIT
Deepsec Documentation Guidevercel-labs/deepsec8.1k—~956Automated safety check: PassApache-2.0
Skill Scannergetsentry/skills1k4 repos~2.5kAutomated safety check: WarnApache-2.0
Serenity Aleabitoreddityan-labs/serenity-aleabitoreddit4811 repos~3.3kAutomated safety check: PassNone
Security Alert Triageelastic/agent-skills5921 repos~3.5kAutomated safety check: NotesApache-2.0

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Categories

Questions about Phx Compound

What does Phx Compound do?

Capture solved problems as searchable solution docs. An agent skill from oliver-kriska/claude-elixir-phoenix. Phx Compound is an agent skill from oliver-kriska/claude-elixir-phoenix. Capture solved problems as searchable solution docs.

When should I use Phx Compound?

Phx Compound fits situations like: security work in your project.

How do I install Phx Compound in Claude Code?

Run `npx skills add oliver-kriska/claude-elixir-phoenix --skill phx-compound -a claude-code`. Or copy the skill folder (targets/amp/skills/phx-compound in oliver-kriska/claude-elixir-phoenix) into .claude/skills/phx-compound in your project. Claude Code loads it when a task matches its description.

How do I install Phx Compound in Codex?

Run `npx skills add oliver-kriska/claude-elixir-phoenix --skill phx-compound -a codex`. Or copy the skill folder (targets/amp/skills/phx-compound in oliver-kriska/claude-elixir-phoenix) into .agents/skills/phx-compound in your project. Codex loads it when a task matches its description.

Can I use Phx Compound in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add oliver-kriska/claude-elixir-phoenix --skill phx-compound -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/phx-compound, .gemini/skills/phx-compound, .github/skills/phx-compound and .opencode/skills/phx-compound in your project.

What does Phx Compound need to run?

Going by SKILL.md and its folder, Phx Compound needs the command-line tools its instructions call (git).

Does Phx Compound access the network?

SKILL.md contains no URLs. Its commands use git, which can reach the network depending on how they are called. This is read from the text; nothing was executed.

Is Phx Compound safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Phx Compound use?

Phx Compound is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Phx Compound use?

About 929 tokens (SKILL.md is roughly 3.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 853 tokens, read only when the agent opens those files.

What are the alternatives to Phx Compound?

Skills that share tags, products or a category with Phx Compound: Fla Ascend Performance (fla-org/flash-linear-attention, 5.8k stars), Deepsec Documentation Guide (vercel-labs/deepsec, 8.1k stars), Skill Scanner (getsentry/skills, 1k stars) and Serenity Aleabitoreddit (yan-labs/serenity-aleabitoreddit, 481 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Phx Compound?

oliver-kriska (a GitHub user) maintains it in oliver-kriska/claude-elixir-phoenix, which has 565 GitHub stars. The repository holds 111 skills in this directory. The repository was last updated on October 5, 2026.

Source: oliver-kriska/claude-elixir-phoenix on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.