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 skills add ccarvalho-eng/codex-elixir-phoenix --skill elixir-phoenix-documentgit 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-document)<a href="https://agentmods.dev/skills/ccarvalho-eng/codex-elixir-phoenix/elixir-phoenix-document"><img src="https://agentmods.dev/badge/skills/ccarvalho-eng/codex-elixir-phoenix/elixir-phoenix-document/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.
<a href="https://agentmods.dev/skills/ccarvalho-eng/codex-elixir-phoenix/elixir-phoenix-document"><img src="https://agentmods.dev/badge/skills/ccarvalho-eng/codex-elixir-phoenix/elixir-phoenix-document.svg" alt="Reviewed on agentmods" width="80" 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 5.1 | $0.00027 | $0.00737 |
| Opus 5.5 | $0.00011 | $0.00295 |
| Sonnet 5.5 | $0.00005 | $0.00147 |
| Haiku 4.5 | $0.00003 | $0.00074 |
Grade A, and why
elixir-phoenix-document 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 1mo 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.
This is a copy
89% identical to phx-document — 25 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.
How it starts
The opening of the file, as written. The whole thing — 80 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Document
Generate documentation for newly implemented features.
Usage
`elixir-phoenix-document` .codex/plans/magic-link-auth/plan.md
`elixir-phoenix-document` magic link authentication
`elixir-phoenix-document` # Auto-detect from recent plan
Iron Laws
- Never remove existing documentation — Existing docs may reflect design intent that isn't obvious from code alone; update rather than replace
- @moduledoc on every public module — Undocumented modules accumulate quickly and create onboarding friction for new team members
- ADRs capture the "why", not the "what" — Code shows what was built; ADRs explain why this approach was chosen over alternatives
- Match @doc to function's public API — Document parameters, return values, and edge cases; callers shouldn't need to read the implementation
- DO NOT add @doc to untested code — documentation implies a stable contract; document only after tests confirm the function behaves as described
What Gets Documented
| Output | Description |
|---|---|
@moduledoc |
For new modules missing documentation |
@doc |
For public functions without docs |
| README section | For user-facing features |
| ADR | For significant architectural decisions |
Workflow
Step 0: Pre-check (avoid no-op runs)
Run git diff --name-only HEAD~5 | grep '\.ex$' | head -20 to check for new .ex files.
If NO new .ex files were added (only modifications), skip the full
audit and report: "No new modules — documentation coverage unchanged."
This prevents 35-message analysis sessions that conclude "PASS" with
zero output (confirmed: session bb0a0454 wasted ~2K tokens on no-op).
- Identify new modules from recent commits or plan file
- Check documentation coverage (
@moduledoc,@doc) - Generate missing docs using templates
- Add README section if user-facing feature
- Create ADR if architectural decision was made
- Write report to
.codex/plans/{slug}/reviews/{feature}-docs.md
What ships with it
5 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.
- 1mo ago First seen · 80 lines · 27 tokens per session scan A 7d8288fefb95
elixir-phoenix-document is a skill published in the GitHub repository ccarvalho-eng/codex-elixir-phoenix (11 stars, last pushed 5mo ago), licensed MIT. It adds 27 tokens to every session and 737 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 89% identical to phx-document, differing in 25 lines, and is treated as a copy.
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