Borrowing it
Nothing to install: this file belongs to Disentinel/grafema. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/Disentinel/grafema/main/.claude/skills/beam-elixir-ast-gotchas/SKILL.mdgit clone --depth 1 https://github.com/Disentinel/grafemaWrote 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/disentinel/grafema/beam-elixir-ast-gotchas)<a href="https://agentmods.dev/skills/disentinel/grafema/beam-elixir-ast-gotchas"><img src="https://agentmods.dev/badge/skills/disentinel/grafema/beam-elixir-ast-gotchas/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/disentinel/grafema/beam-elixir-ast-gotchas"><img src="https://agentmods.dev/badge/skills/disentinel/grafema/beam-elixir-ast-gotchas.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 | $0.00143 | $0.01549 |
| Opus 5 | $0.00072 | $0.00775 |
| Sonnet 5 | $0.00029 | $0.00310 |
| Haiku 4.5 | $0.00014 | $0.00155 |
Grade A, and why
beam-elixir-ast-gotchas scanned grade A with 1 finding 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 10d 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.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -fsSL https://github.com/elixir-lang/elixir/releases/download/v1.16.3/elixir-otp-26.zip \ The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
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.
- 10d ago First seen · 123 lines · 143 tokens per session scan A 2d4a4467042b
beam-elixir-ast-gotchas is a skill published in the GitHub repository Disentinel/grafema (36 stars, last pushed 17d ago), with no licence file. It adds 143 tokens to every session and 1,549 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
static-code-analysis
Selects, configures, and integrates a static analysis tool for the project's language. Covers tool selection, rule configuration, CI integration, fixing existing violations, and pre-commit hook setup. Invoked when the user asks to add linting, set up static analysis, or configure a code quality tool.
mypy
Skill "mypy" from bobmatnyc/claude-mpm, covering mypy - static type checking for python, basic mypy, with common type stubs, for fastapi projects and for django projects.
code_explorer
Explores the repository to locate primary source files, coupled UI components, and test files for bug reports or feature requests.
session-investigator
Investigate fast-agent session and history files to diagnose issues. Use when a session ended unexpectedly, when debugging tool loops, when correlating sub-agent traces with main sessions, or when analyzing conversation flow and timing. Covers session.json metadata, history JSON format, message structure, tool…
smiles-validation
Strict SMILES validation, structural comparison, and modification verification. Catches invalid LLM-generated molecules.
dd-triage-flaky-test
Load when investigating a specific flaky test. Gets history, failure pattern, and category, then recommends fix, quarantine, or escalate.