marin: Skill for Claude Code

.agents/skills/file-issue/SKILL.md

file-issue is a skill for Claude Code, Codex from marin-community/marin. It costs 31 tokens per session (1,072 once invoked), scanned A, original, Apache-2.0.

A procedure for creating a GitHub issue only when someone has explicitly requested one or another workflow requires it.

In plain words
What is it for?
Writing bug, task, or experiment issues with clear context, reproduction steps, expected results, and acceptance criteria.
Why use it?
It prevents unnecessary issues and ensures a new issue has the repository’s required format, labels, and completion details.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents); mentions AGENTS.md.

This is marin-community/marin's own configuration. It tells Claude Code and Codex how to work on marin itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything marin configures →

About the project

Marin is an open-source research program, software platform, and community for developing foundation models such as large language models. Researchers use it for data preparation, tokenization, pretraining, posttraining, evaluation, and related experiments, including work on audio-text, DNA, and protein models. The catalogue entries are add-ons that support workflows around Marin.

marin-community/marin · 3,444 stars · on GitHub · marin.community

Reuse

Borrowing it

Nothing to install: this file belongs to marin-community/marin. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/marin-community/marin/main/.agents/skills/file-issue/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/marin-community/marin

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for file-issue

README.md
[![agentmods](https://agentmods.dev/badge/skills/marin-community/marin/file-issue.svg)](https://agentmods.dev/skills/marin-community/marin/file-issue)
Your own site
<a href="https://agentmods.dev/skills/marin-community/marin/file-issue"><img src="https://agentmods.dev/badge/skills/marin-community/marin/file-issue.svg" alt="Measured on agentmods" height="20"></a>
Per session 31 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,072 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00031 $0.01072
Opus 5 $0.00015 $0.00536
Sonnet 5 $0.00006 $0.00214
Haiku 4.5 $0.00003 $0.00107

Measured 6d ago against content hash eab5668f9997, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

file-issue 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 6d 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.

.agents/skills/file-issue/SKILL.md · 158 lines

How it starts

The opening of the file, as written. The whole thing — 158 lines — stays where its author put it; the contents beside it link to each section on GitHub.

File a GitHub issue

Before drafting, read AGENTS.md and:

  • .agents/skills/writing-style/SKILL.md
  • .agents/skills/writing-style/issues.md
  • .agents/skills/writing-style/ai-writing-donts.md

Issue Kinds and Body Structure

Pick the smallest matching structure.

Kind When to use Labels
bug A bug or regression was found bug, agent-generated
task An improvement, refactor, or feature request agent-generated + priority if known
experiment An experiment needs tracking experiment, agent-generated

Bug body

<what is broken and its impact -- concrete symptoms or error messages>

Reproduce:
1. <step>
2. <step>

Expected: <what should happen instead>

<optional: concise evidence or confirmed root cause>

Task body

<what needs to be done and why -- enough context for anyone on the team>

Done when:
<specific, testable completion criteria>

Experiment body

## TL;DR

<One-paragraph current summary. Leave blank only when the work is just being kicked off.>

## Description

<Context someone outside the thread can understand.>

## Hypothesis or Goal

<What are you trying to learn, fix, or achieve?>

## Status

<Current state; update as evidence lands.>

## Links

* Logbook:
* W&B Report:
* Important updates:

## Decision Log

## Conclusion

Workflow

1. Gather and classify

Extract the symptom or desired outcome, impact, location, reproduction, known cause, and severity. Ask when the issue or its kind is ambiguous.

2. Check duplicates

Search for existing issues first:

gh issue list --repo marin-community/marin --state open --search "<keyword>"

If a match exists, tell the user and offer to comment on it instead.

3. Draft

Title: At most 80 characters, optionally prefixed with a scope tag. State a factual symptom for a bug (e.g. [levanter] Gradient accumulation drops the last microbatch) and an imperative outcome for a task (e.g. [levanter] Handle partial accumulation steps). Do not add bug:, task:, or another type prefix.

Read the full file on GitHub · 158 lines

Changes

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.

  1. 6d ago First seen · 158 lines · 31 tokens per session scan A eab5668f9997

Subscribe to this mod's changes

file-issue is a skill published in the GitHub repository marin-community/marin (3,444 stars, last pushed today), licensed Apache-2.0. It adds 31 tokens to every session and 1,072 once invoked, about $0.0002 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.