firstmate is an agent distribution that lets one coding agent coordinate a crew of autonomous agents working in separate git worktrees. It is for running parallel fixes, investigations, plans, and audits while receiving completed pull requests, merges, or reports through one supervising agent. The catalogue entries provide skills, hooks, instructions, and settings for operating this workflow.
Borrowing it
Nothing to install: this file belongs to kunchenguid/firstmate. 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/kunchenguid/firstmate/main/.agents/skills/scout-completion/SKILL.mdgit clone --depth 1 https://github.com/kunchenguid/firstmateWrote 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/kunchenguid/firstmate/scout-completion)<a href="https://agentmods.dev/skills/kunchenguid/firstmate/scout-completion"><img src="https://agentmods.dev/badge/skills/kunchenguid/firstmate/scout-completion/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/kunchenguid/firstmate/scout-completion"><img src="https://agentmods.dev/badge/skills/kunchenguid/firstmate/scout-completion.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 | $0.00028 | $0.00271 |
| Opus 5.5 | $0.00011 | $0.00108 |
| Sonnet 5.5 | $0.00006 | $0.00054 |
| Haiku 4.5 | $0.00003 | $0.00027 |
Grade A, and why
scout-completion 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 19d 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
Scout outcome and promotion
A completed scout must leave a self-contained report before its scratch worktree can be discarded; read and relay its findings, record the report as the Done artifact, and re-evaluate the queue.
A report may recommend implementation but does not authorize it.
Before treating the investigation or any visual review as complete, load captain-hold-lifecycle; teardown enforces that shared completion gate.
When a scout's deliverable is a visual artifact the captain will iterate on, keep it alive and follow the crew-hosted Lavish board contract in docs/configuration.md rather than arming or polling the board from firstmate.
When implementation is separately authorized, promote the existing scout through bin/fm-promote.sh rather than creating a duplicate task.
The promoted worker must inventory scratch state, return to a clean copy of the task's base (its recorded base branch, else the default branch), carry over only intended fix changes, create the ship branch, and follow the project's selected delivery path while leaving scratch commits and debug edits behind and turning a reproduced bug into the regression test.
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.
- 19d ago Changed cdf7bc5d88f7
- 27d ago First seen · 17 lines · 28 tokens per session scan A 2802766a0db2
scout-completion is a skill published in the GitHub repository kunchenguid/firstmate (8,295 stars, last pushed today), licensed MIT. It adds 28 tokens to every session and 271 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-09-28.
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