phoenix-generator

phoenix-generator is a skill for Claude Code, Codex from mkreyman/bmad-elixir. It costs 42 tokens per session (1,743 once invoked), scanned A, original, MIT.

A guide to Phoenix’s built-in code generators, which create common application pieces such as contexts, database schemas, migrations, controllers, and LiveViews.

In plain words
What is it for?
Use it to scaffold contexts, schemas, database changes, CRUD screens, JSON or HTML resources, authentication, and LiveView components.
Why use it?
It reduces the manual work and inconsistency involved in setting up the files and tests needed for a new Phoenix feature.

Skill for Claude CodeCodex

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.

agentmods
npx agentmods add skills/mkreyman/bmad-elixir/phoenix-generator
Any agent
npx skills add mkreyman/bmad-elixir --skill phoenix-generator
Clone the repo
git clone --depth 1 https://github.com/mkreyman/bmad-elixir

Made for: Claude Code, Codex.

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 phoenix-generator

README.md
[![agentmods](https://agentmods.dev/badge/skills/mkreyman/bmad-elixir/phoenix-generator.svg)](https://agentmods.dev/skills/mkreyman/bmad-elixir/phoenix-generator)
Your own site
<a href="https://agentmods.dev/skills/mkreyman/bmad-elixir/phoenix-generator"><img src="https://agentmods.dev/badge/skills/mkreyman/bmad-elixir/phoenix-generator.svg" alt="Measured on agentmods" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,743 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found 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 $0.00042 $0.01743
Opus 5 $0.00021 $0.00872
Sonnet 5 $0.00008 $0.00349
Haiku 4.5 $0.00004 $0.00174

Measured 5d ago against content hash 37ea1060c83e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

phoenix-generator 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 5d 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.

priv/skills/phoenix-generator/SKILL.md · 314 lines

How it starts

The opening of the file, as written. The whole thing — 314 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Phoenix Generator

This skill helps generate Phoenix resources using built-in generators with proper patterns and best practices.

When to Use

  • Creating new Phoenix contexts
  • Adding schemas to existing contexts
  • Generating LiveView CRUD interfaces
  • Creating JSON/HTML resources
  • Scaffolding authentication

Available Generators

Context and Schema Generation

mix phx.gen.context - Generate a context with schema and migration

mix phx.gen.context Accounts User users name:string email:string:unique age:integer

Generates:

  • Context module: lib/my_app/accounts.ex
  • Schema: lib/my_app/accounts/user.ex
  • Migration: priv/repo/migrations/*_create_users.exs
  • Test files

mix phx.gen.schema - Schema and migration only (no context)

mix phx.gen.schema Accounts.User users name:string email:string:unique

LiveView Generators

mix phx.gen.live - Full LiveView CRUD with context

mix phx.gen.live Catalog Product products \
  name:string \
  description:text \
  price:decimal \
  sku:string:unique \
  in_stock:boolean

Generates:

  • Context and schema
  • LiveView modules (Index, Show, Form Component)
  • Routes
  • Tests

mix phx.gen.live.component - Standalone LiveView component

mix phx.gen.live.component Components.Modal

Traditional Web Generators

mix phx.gen.html - HTML resource with controllers

mix phx.gen.html Blog Post posts title:string body:text published:boolean

mix phx.gen.json - JSON API resource

mix phx.gen.json Shop Product products name:string price:decimal

Field Types and Modifiers

Common Field Types

  • string - varchar(255)
  • text - unlimited text
  • integer - whole numbers
  • decimal - precise decimals (for money)
  • float - floating point
  • boolean - true/false
  • date - date only
  • time - time only
  • datetime - timestamp
  • uuid - UUID
  • binary - binary data

Field Modifiers

  • :unique - adds unique index
  • :redact - marks for redaction in logs
  • name:string:unique:redact - chain modifiers

Read the full file on GitHub · 314 lines

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. 5d ago First seen · 314 lines · 42 tokens per session scan A 37ea1060c83e

Subscribe to this mod's changes

phoenix-generator is a skill published in the GitHub repository mkreyman/bmad-elixir (10 stars, last pushed 10mo ago), licensed MIT. It adds 42 tokens to every session and 1,743 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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