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.
npx agentmods add skills/ccarvalho-eng/codex-elixir-phoenix/elixir-phoenix-examplesnpx skills add ccarvalho-eng/codex-elixir-phoenix --skill elixir-phoenix-examplesgit clone --depth 1 https://github.com/ccarvalho-eng/codex-elixir-phoenixWhat 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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00024 | $0.01062 |
| Opus 5 | $0.00012 | $0.00531 |
| Sonnet 5 | $0.00005 | $0.00212 |
| Haiku 4.5 | $0.00002 | $0.00106 |
Grade A, and why
elixir-phoenix-examples 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 3d 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.
How it starts
The opening of the file, as written. The whole thing — 142 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Examples & Walkthroughs
Official Phoenix Guides (Reference)
For standard implementation patterns, always check official guides first:
| Topic | Guide |
|---|---|
| Contexts | hexdocs.pm/phoenix/contexts |
| Ecto Basics | hexdocs.pm/phoenix/ecto |
| LiveView | hexdocs.pm/phoenix_live_view |
| Authentication | mix phx.gen.auth |
| Channels | hexdocs.pm/phoenix/channels |
| Testing | hexdocs.pm/phoenixelixir-phoenix-testing |
| Deployment | hexdocs.pm/phoenixelixir-phoenix-deployment |
Plugin-Specific Patterns
Patterns NOT in official guides (unique to this plugin):
Tidewave Integration Workflow
# 1. Check if Tidewave is running
/mcp
# 2. If connected, debug with runtime tools
# Get exact docs for YOUR dependency versions
mcp__tidewave__get_docs "Ecto.Query"
# Execute code in running app
mcp__tidewave__project_eval "MyApp.Accounts.list_users() |> length()"
# Query database directly
mcp__tidewave__execute_sql_query "SELECT count(*) FROM users"
Multi-Agent Review Workflow
# 1. Plan feature with specialist agents
`elixir-phoenix-plan` Add user avatars with S3 upload
# 2. After implementation, review with multiple perspectives
`elixir-phoenix-review` lib/my_app/accounts.ex # Elixir idioms
# Security analyzer runs automatically on auth code
# 3. Before deployment
# Deployment validator checks production readiness
Iron Laws Enforcement
This plugin enforces non-negotiable rules across all agents:
Elixir Idioms:
- NO process without runtime reason
- Messages are copied (keep small)
- Changesets for external data
LiveView:
- NEVER query DB in mount
- ALWAYS use streams for lists
- RE-AUTHORIZE in every handle_event
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.
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.
- 3d ago First seen · 142 lines · 24 tokens per session scan A 076043c9ce7b
elixir-phoenix-examples is a skill published in the GitHub repository ccarvalho-eng/codex-elixir-phoenix (11 stars, last pushed 4mo ago), licensed MIT. It adds 24 tokens to every session and 1,062 once invoked, about $0.0001 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 2026-08-30.
Other skills, from other repositories
agent-newbie-guide
Skill "agent-newbie-guide" from hashgraph-online/awesome-codex-plugins, covering codex 新手引导, 🚫 新手术语过滤（绝对禁止）, 统一行为规范（内嵌）, 📍 阶段位置 and 启动自检.
agent-learning-coach
中文学习教练技能。用于学习编程、英语、设计、产品、AI、数学或任何技能时，先诊断水平，再用讲解、练习、反馈、复习的循环推进。触发语包括"进入学习模式""我想学""带我练""帮我制定学习计划""像教练一样教我"。.
lab-creator
Guide for creating new AI Gateway labs. Use when users want to create a new lab in the labs/ folder. This skill provides the standard lab structure, templates, and patterns used across the AI Gateway repository including Jupyter notebooks, Bicep infrastructure templates, APIM policies, and README documentation.
ash-framework
Use this skill working with Ash Framework or any of its extensions. Always consult this when making any domain changes, features or fixes.
phoenix-framework
Use this skill working with Phoenix Framework. Consult this when working with the web layer, controllers, views, liveviews etc.
writing-review-packets
Create or revise Reviews packet markdown for a code diff, including section strategy, prose, hunk references, validation, and pushing packet revisions with the Reviews CLI. Use when the user asks to write a review packet, organize a diff for review, add prose around hunk refs, update a packet for a new patchset, or…