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-brainstormnpx skills add ccarvalho-eng/codex-elixir-phoenix --skill elixir-phoenix-brainstormgit 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-brainstorm)<a href="https://agentmods.dev/skills/ccarvalho-eng/codex-elixir-phoenix/elixir-phoenix-brainstorm"><img src="https://agentmods.dev/badge/skills/ccarvalho-eng/codex-elixir-phoenix/elixir-phoenix-brainstorm.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 | $0.01424 |
| Opus 5 | $0.00011 | $0.00712 |
| Sonnet 5 | $0.00004 | $0.00285 |
| Haiku 4.5 | $0.00002 | $0.00142 |
Grade A, and why
elixir-phoenix-brainstorm 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.
How it starts
The opening of the file, as written. The whole thing — 143 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Brainstorm — Adaptive Requirements Gathering
Interactive interview → research → synthesis loop. Produces structured
interview.md that elixir-phoenix-plan detects and consumes (skipping clarification).
Usage
`elixir-phoenix-brainstorm` Add some kind of notification system
`elixir-phoenix-brainstorm` Improve authentication security
`elixir-phoenix-brainstorm` # starts with open question
Workflow
`elixir-phoenix-brainstorm` {topic}
|
v
[INTERVIEW] ←──────────────────┐
| |
v (sufficient OR user exit) |
[DECISION POINT] |
├─ Research ──→ [RESEARCH] ─┘
├─ Continue interview ──────┘
├─ Make a plan ──→ STOP (suggest `elixir-phoenix-plan` {slug})
├─ Store & exit ──→ STOP (artifacts saved)
└─ Discuss ──→ freeform ──→ [DECISION POINT]
Phase 1: Adaptive Interview
Create .codex/plans/{slug}/ directory. Start asking ONE question at a time.
Coverage Dimensions
Track coverage across 6 dimensions (0=uncovered, 1=partial, 2=sufficient). Ask Scope early — for "optimize X" topics, ask about boundaries (upstream OK? Local-only? CI vs dev?) before research, not during.
| Dim | Target | Sufficient signal |
|---|---|---|
| What | Specific behavior/features | Concrete verbs, not "some kind of" |
| Why | Problem solved, user need | Clear benefit stated |
| Scope | In/out boundaries | Explicit exclusions stated |
| Where | Modules, contexts, pages | File paths or context names mentioned |
| How | Approach, constraints | At least one concrete constraint |
| Edge | Error states, scale, auth | 2+ edge cases identified |
Interview is "sufficient" when total score >= 8 out of 12.
Context-Aware Questioning
Before each question, run a brief codebase scan on topics the user mentioned:
- User mentions a topic (e.g., "notifications") → run
rg/rg --filesfor related patterns - Use scan results to ground your next question in what actually exists
- Unknown/niche topic → suggest research pause before continuing
What ships with it
3 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.
- 5d ago First seen · 143 lines · 22 tokens per session scan A 71c15d8860ae
elixir-phoenix-brainstorm 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 1,424 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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