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/georgeguimaraes/claude-code-elixir/using-elixir-skillsnpx skills add georgeguimaraes/claude-code-elixir --skill using-elixir-skillsgit clone --depth 1 https://github.com/georgeguimaraes/claude-code-elixirWrote 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/georgeguimaraes/claude-code-elixir/using-elixir-skills)<a href="https://agentmods.dev/skills/georgeguimaraes/claude-code-elixir/using-elixir-skills"><img src="https://agentmods.dev/badge/skills/georgeguimaraes/claude-code-elixir/using-elixir-skills.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 | $0.00096 | $0.00549 |
| Opus 5 | $0.00048 | $0.00275 |
| Sonnet 5 | $0.00019 | $0.00110 |
| Haiku 4.5 | $0.00010 | $0.00055 |
Grade A, and why
using-elixir-skills 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.
What it actually says
THIS IS NOT OPTIONAL. Skills tell you HOW to explore and WHAT to look for. You cannot rationalize your way out of this.
The Rule
Elixir/Phoenix/OTP task → Invoke skill FIRST → Then explore/research → Then write code
Skills come before exploration. The skills tell you what patterns to look for, what questions to ask, and what anti-patterns to avoid. Exploring without the skill means you don't know what you're looking for.
Skill Triggers
| Trigger Phrases | Skill to Invoke |
|---|---|
| code, implement, write, design, architecture, structure, pattern | elixir-thinking |
| LiveView, Plug, PubSub, mount, channel, socket, component | phoenix-thinking |
| context, schema, Ecto, changeset, preload, Repo, migration | ecto-thinking |
| GenServer, supervisor, Task, ETS, bottleneck, Broadway | otp-thinking |
| Oban, workflow, job queue, cascade, graft, background job, async job | oban-thinking |
Red Flags
These thoughts mean STOP—invoke the skill:
| Thought | Reality |
|---|---|
| "Let me explore the codebase first" | Skills tell you WHAT to look for. Invoke first. |
| "Let me understand the code first" | Skills guide understanding. Invoke first. |
| "But first, let me..." | No. Skills come first. Always. |
| "I'll add a process to organize this" | Processes are for runtime, not organization. |
| "GenServer is the Elixir way" | GenServer is a bottleneck by design. |
| "I'll query in mount" | mount is called twice. |
| "Task.async is simpler" | Use Task.Supervisor in production. |
| "I know Elixir well enough" | These skills contain paradigm shifts. Invoke them. |
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 · 44 lines · 96 tokens per session scan A cafc4a266396
using-elixir-skills is a skill published in the GitHub repository georgeguimaraes/claude-code-elixir (168 stars, last pushed 4mo ago), licensed Apache-2.0. It adds 96 tokens to every session and 549 once invoked, about $0.0005 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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pixir-delegate
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readonly-review
Run a no-network read-only review practice with two explorer steps and one synthesis step.