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-plannpx skills add ccarvalho-eng/codex-elixir-phoenix --skill elixir-phoenix-plangit clone --depth 1 https://github.com/ccarvalho-eng/codex-elixir-phoenixWrote 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.
[](https://agentmods.dev/skills/ccarvalho-eng/codex-elixir-phoenix/elixir-phoenix-plan)<a href="https://agentmods.dev/skills/ccarvalho-eng/codex-elixir-phoenix/elixir-phoenix-plan"><img src="https://agentmods.dev/badge/skills/ccarvalho-eng/codex-elixir-phoenix/elixir-phoenix-plan.svg" alt="Measured on agentmods" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00022 | $0.01379 |
| Opus 5 | $0.00011 | $0.00690 |
| Sonnet 5 | $0.00004 | $0.00276 |
| Haiku 4.5 | $0.00002 | $0.00138 |
Grade A, and why
elixir-phoenix-plan 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 4d 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.
Plan Elixir/Phoenix Feature
Plan a feature by spawning Elixir specialist agents, then output structured plan with checkboxes.
What Makes elixir-phoenix-plan Different from the generic plan flow
- Keeps Elixir/Phoenix-specific research and task routing in view
- Plans with
[ecto],[liveview],[oban]task routing - Checks for Iron Law compliance in the plan
- Includes
mix compile/format/credo/testverification - Understands Phoenix context boundaries
Usage
`elixir-phoenix-plan` Add user avatars with S3 upload
`elixir-phoenix-plan` .codex/plans/notifications/reviews/notifications-review.md
`elixir-phoenix-plan` Implement notifications --depth deep
`elixir-phoenix-plan` .codex/plans/auth/plan.md --existing
Arguments
$ARGUMENTS= Feature description, review file, or existing plan--depth quick|standard|deep= Planning depth (auto-detected)--existing= Enhance an existing plan with deeper research
Workflow
- Gather context — File path (skip to agents), brainstorm interview.md (skip clarification), clear description, or vague
- Clarify if vague — Ask questions ONE at a time (skip if brainstorm interview.md exists with Status: COMPLETE)
- Detect depth — Auto-detect quick/standard/deep
- Runtime context (Tidewave) — Gather live schemas, routes, and warnings before spawning agents (see planning-orchestrator)
- Spawn research agents — Selective, parallel, based on need.
Create a Codex task per agent for progress visibility:
create a task named
"{Agent} research", markin_progresson spawn,completedwhen done - Wait for ALL agents — Do NOT proceed until all return "completed". NEVER write plan while any agent is still running
- Breadboard (LiveView) — System map for multi-page features
- Completeness check — MANDATORY when planning from review
- Split decision — One plan or multiple, concrete options
- Generate plan — Checkboxes, phased tasks, code patterns.
Also create
plans/{slug}/scratchpad.mdfor decisions and dead-ends - Self-check (deep only) — Three questions in Risks section
- Present and ask — STOP, show summary, let user decide
What ships with it
7 files 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.
- 4d ago First seen · 142 lines · 22 tokens per session scan A da758e157253
elixir-phoenix-plan is a skill published in the GitHub repository ccarvalho-eng/codex-elixir-phoenix (11 stars, last pushed 4mo ago), licensed MIT. It adds 22 tokens to every session and 1,379 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.
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