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Agent skill

Phx Quick

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

Implement small Phoenix changes without planning — add validations; Use for single-file edits under 50 lines.

MITAuto-check passedAI & LLM Engineering

Install Phx Quick

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

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

GitHub CLI
$ gh skill install oliver-kriska/claude-elixir-phoenix phx-quick --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/codex/skills/phx-quick .claude/skills/phx-quick && 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-quick
GitHub stars
565
Token cost
~805 tokens
SKILL.md length
255 words
Files
1
Skills in repo
105
Repo updated
First seen
Licence
MIT

At a glance

Implement small Phoenix changes without planning — add validations; Use for single-file edits under 50 lines.

  • Works in 4 steps: Understand - Read the files the change… → Implement - Write code directly → Verify - Quick compile check → …
  • Single-file edits under 50 lines
  • SKILL.md covers Usage, Arguments, How It Differs and Workflow, plus 7 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Phx Quick is an agent skill from oliver-kriska/claude-elixir-phoenix. Implement small Phoenix changes without planning — add validations; Use for single-file edits under 50 lines.

Its SKILL.md is about 810 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in AI & LLM Engineering, covering LLM observability. 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

  • Single-file edits under 50 lines
  • Tasks that involve LLM observability

Example prompts

  • “/phx-quick”

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. Understand - Read the files the change touches
  2. Implement - Write code directly
  3. Verify - Quick compile check
  4. Done - No ceremony

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

    No scripts in the folder and no shell commands in SKILL.md (its code samples are bash).

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

  • Network

    No URLs in SKILL.md.

    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 Quick loads about 805 tokens when it runs. Until then it costs about 30 tokens; SKILL.md has 255 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~30
When it runs · the whole SKILL.md, loaded when a task matches
~805

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). 255 words, ~805 tokens.

Download SKILL.mdSave it as .claude/skills/phx-quick/SKILL.md (or your agent's skills folder).
name
phx-quick
description
Implement small Phoenix changes without planning — add validations; Use for single-file edits under 50 lines.

Quick Mode

Skip the planning ceremony. Get working code fast.

Usage

bash
$elixir-phoenix:phx-quick Add pagination to posts
$elixir-phoenix:phx-quick Fix the login redirect bug
$elixir-phoenix:phx-quick Add CSV export to reports

Arguments

$ARGUMENTS = What to implement

How It Differs

Normal ModeQuick Mode
Spawn research agentsNo agents
Create plan documentMental model only
Parallel reviewOptional single review
Multiple iterationsSingle pass

Workflow

  1. Understand - Read the files the change touches
  2. Implement - Write code directly
  3. Verify - Quick compile check
  4. Done - No ceremony

Iron Laws

  1. NEVER skip verification — run mix compile --warnings-as-errors after every change, even in quick mode
  2. DO NOT touch files outside the stated scope — quick mode means minimal blast radius; if a fix requires changes across multiple domains, escalate to $elixir-phoenix:phx-plan
  3. NEVER bypass security checks for speed — auth, input validation, and XSS rules apply regardless of change size

Rules in Quick Mode

Still Enforced (Iron Laws)
  • ✓ No process without runtime reason
  • ✓ No DB in mount
  • ✓ Security basics (no SQL injection, etc.)
  • ✓ Run mix format
Skipped
  • ✗ Parallel agent research
  • ✗ Written plan document
  • ✗ Multiple review passes
  • ✗ Documentation updates

When to Use

Good for:

  • Bug fixes with clear solution
  • Small features (<100 lines)
  • Refactoring with tests
  • Adding fields/columns
  • UI tweaks

Not for:

  • New authentication flows
  • Payment integration
  • Data migrations
  • Architectural changes
  • Anything touching security

Quick Patterns

Add Field
bash
/quick Add phone field to users

→ Migration + schema + changeset + form field

Fix Bug
bash
/quick Fix: posts not showing for admin users

→ Find issue + fix + verify

Add Endpoint
bash
/quick Add GET /api/health endpoint

→ Route + controller + response

Escape Hatch

If quick mode hits complexity:

This needs more planning. Switching to normal mode.
Run $elixir-phoenix:phx-plan [task] for full analysis.

Verification

After quick implementation:

Run mix compile --warnings-as-errors. If you touched Ecto schemas or migrations, run mix ecto.migrate. Then run mix test test/path_test.exs for affected tests.

Example Session

User: $elixir-phoenix:phx-quick Add archived_at timestamp to posts

Claude:
1. Reading lib/my_app/blog/post.ex...
2. Creating migration...

# priv/repo/migrations/xxx_add_archived_at_to_posts.exs
def change do
  alter table(:posts) do
    add :archived_at, :utc_datetime
  end
end

3. Updating schema...

# lib/my_app/blog/post.ex
field :archived_at, :utc_datetime

4. Adding to changeset...

def changeset(post, attrs) do
  post
  |> cast(attrs, [:title, :body, :archived_at])
  ...
end

5. Verifying...
$ mix compile --warnings-as-errors ✓
$ mix ecto.migrate ✓
$ mix test test/my_app/accounts_test.exs ✓

Done.

© 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

Just SKILL.md in targets/codex/skills/phx-quick of oliver-kriska/claude-elixir-phoenix.

Open the folder on GitHubat commit 9767a82

Compare with similar skills

Phx Quick 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 Quick compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Phx Quick this skilloliver-kriska/claude-elixir-phoenix565—~805Automated safety check: PassMIT
BenchAlphaLab-USTC/OhMyCode131—~941Automated safety check: PassMIT
Langfuse Integration Pagelangfuse/langfuse-docs246—~3.7kAutomated safety check: PassMIT
Langfuselangfuse/skills299—~2.1kAutomated safety check: NotesMIT
Analyzing Claude Code Sessionsamd/gaia1.6k—~2.3kAutomated safety check: PassMIT
Langsmith ObservabilityOrchestra-Research/AI-Research-SKILLs13k3 repos~2.4kAutomated safety check: PassMIT

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Categories

Questions about Phx Quick

What does Phx Quick do?

Implement small Phoenix changes without planning — add validations; Use for single-file edits under 50 lines. Phx Quick is an agent skill from oliver-kriska/claude-elixir-phoenix. Implement small Phoenix changes without planning — add validations; Use for single-file edits under 50 lines.

When should I use Phx Quick?

Phx Quick fits situations like: single-file edits under 50 lines; tasks that involve LLM observability.

How do I install Phx Quick in Claude Code?

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

How do I install Phx Quick in Codex?

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

Can I use Phx Quick 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-quick -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-quick, .gemini/skills/phx-quick, .github/skills/phx-quick and .opencode/skills/phx-quick in your project.

What does Phx Quick need to run?

SKILL.md names no scripts, command-line tools or credentials: Phx Quick is instructions for the agent only.

Does Phx Quick access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Phx Quick 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 Quick use?

Phx Quick 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 Quick use?

About 805 tokens (SKILL.md is roughly 3.2k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Phx Quick?

Skills that share tags, products or a category with Phx Quick: Bench (AlphaLab-USTC/OhMyCode, 131 stars), Langfuse Integration Page (langfuse/langfuse-docs, 246 stars), Langfuse (langfuse/skills, 299 stars) and Analyzing Claude Code Sessions (amd/gaia, 1.6k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Phx Quick?

oliver-kriska (a GitHub user) maintains it in oliver-kriska/claude-elixir-phoenix, which has 565 GitHub stars. The repository holds 105 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.