phx-intro

phx-intro is a skill for Claude Code from oliver-kriska/claude-elixir-phoenix. It costs 47 tokens per session (560 once invoked), scanned A, a copy of intro, MIT.

An interactive tutorial for learning the Elixir/Phoenix plugin’s commands, workflow, and features. It presents the material in six sections and lets the learner move through them or jump to a section.

In plain words
What is it for?
Use it when first learning the plugin or refreshing your knowledge of its available workflows.
Why use it?
It gives new users a guided way to understand the plugin before using its individual commands.

Skill for Claude Code

Written for Claude Code: $ARGUMENTS substitution. Also seen: mentions subagents; names the AskUserQuestion tool.

Good fit Use it when first learning the plugin or refreshing your knowledge of its available workflows.

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Install with agentmods
npx agentmods add skills/oliver-kriska/claude-elixir-phoenix/phx-intro
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add oliver-kriska/claude-elixir-phoenix --skill phx-intro
Clone the repo
git clone --depth 1 https://github.com/oliver-kriska/claude-elixir-phoenix

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for phx-intro

README.md
[![agentmods](https://agentmods.dev/badge/skills/oliver-kriska/claude-elixir-phoenix/phx-intro/github.svg)](https://agentmods.dev/skills/oliver-kriska/claude-elixir-phoenix/phx-intro)
Your own site
<a href="https://agentmods.dev/skills/oliver-kriska/claude-elixir-phoenix/phx-intro"><img src="https://agentmods.dev/badge/skills/oliver-kriska/claude-elixir-phoenix/phx-intro/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for phx-intro

Your own site · 80×15
<a href="https://agentmods.dev/skills/oliver-kriska/claude-elixir-phoenix/phx-intro"><img src="https://agentmods.dev/badge/skills/oliver-kriska/claude-elixir-phoenix/phx-intro.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 560 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 94% copy Near-identical to another mod in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00047 $0.00560
Opus 5 $0.00023 $0.00280
Sonnet 5 $0.00009 $0.00112
Haiku 4.5 $0.00005 $0.00056

Measured 6d ago against content hash b6795286cc89, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

phx-intro scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

94% identical to intro — 14 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

targets/amp/skills/phx-intro/SKILL.md · 66 lines

How it starts

The opening of the file, as written. The whole thing — 66 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Plugin Introduction Tutorial

Interactive walkthrough of the Elixir/Phoenix plugin in 6 sections (~5 min).

Arguments

  • $ARGUMENTS may contain --section N to jump to a specific section (1-6)
  • No arguments = start from Section 1

Execution Flow

  1. Read references/tutorial-content.md for all section content
  2. Parse $ARGUMENTS for --section N flag (1-6)
  3. If --section N specified, jump directly to that section
  4. Otherwise start from Section 1

Section Presentation Loop

For each section:

  1. Present the section content completely — do NOT abbreviate or summarize. Every paragraph, table, and code block in the reference file must appear in output — as visible response text emitted BEFORE the AskUserQuestion call; content composed only in thinking is invisible to the user
  2. After presenting, use AskUserQuestion with options:
    • If sections remain: "Next: [next section title]", "Skip to Cheat Sheet", "Stop here"
    • If on final section (6): no question needed, end with closing message

Section Titles

N Title
1 Welcome
2 Core Workflow Commands
3 Knowledge & Safety Net
4 Hooks & Behavioral Rules
5 Init, Review & Gaps
6 Cheat Sheet & Next Steps

Iron Laws

  1. ONE section at a time — never dump all content at once
  2. User controls pace — always offer to stop between sections
  3. Clean formatting — use tables and code blocks, not walls of text
  4. NEVER skip the user's questions — tutorial is interactive, not a monologue; if the user asks a question mid-section, answer it before continuing

Closing Message

After Section 6 (or when user stops):

You're all set! Try `phx-plan` with your next feature to see the workflow in action.
Run `phx-intro --section N` anytime to revisit a specific section.

Notes

  • This runs in main conversation context (not a subagent)
  • Reference file is readable since skill runs in user's session
  • Keep tone welcoming but concise — developers don't want fluff

Read the full file on GitHub · 66 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 6d ago First seen · 66 lines · 47 tokens per session scan A b6795286cc89

Subscribe to this mod's changes

phx-intro is a skill published in the GitHub repository oliver-kriska/claude-elixir-phoenix (542 stars, last pushed 4d ago), licensed MIT. It adds 47 tokens to every session and 560 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. It is 94% identical to intro, differing in 14 lines, and is treated as a copy.

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