Harness Adapters

What it does

Example prompts

• “/harness-adapters”

What it can do on your machine

Read from SKILL.md and the folder at commit 19fcbbd. It shows what the files ask for, not the result of running them.

• Tool permissions

  Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

  From allowed-tools in the SKILL.md frontmatter.

• Runs code

  No scripts in the folder and no shell commands in SKILL.md (its code samples are json).

  From the folder's file list and the shell code blocks in SKILL.md.

• Network

  No URLs in SKILL.md.

  From URLs in SKILL.md, links to its own repository left out.

• Credentials

  Names no API keys, tokens, secrets or passwords.

  From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Harness Adapters loads about 1.7k tokens when it runs, and up to ~30k if it reads all its reference files. Until then it costs about 107 tokens; SKILL.md has 536 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it

~107

When it runs · the whole SKILL.md, loaded when a task matches

~1.7k

With references · SKILL.md plus every file in references/, read only if the agent opens them

~30k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from kunchenguid/firstmate at commit 19fcbbd, republished under its MIT licence (© kunchenguid). 536 words, ~1,694 tokens.

name

harness-adapters

description

Agent-only reference for firstmate harness operations. Use before spawning or recovering a crewmate or secondmate, handling a trust dialog, sending a harness-specific skill invocation, interrupting or exiting an agent, resuming an exited agent, or verifying a new harness adapter. Contains verified facts for claude, codex, opencode, pi, pi-signed, grok, kimi, cursor, gemini, muse, rovo, omp, agy, and devin.

user-invocable

false

metadata.internal

true

{
  "operations": {
    "start": {
      "default": ["references/common/dispatch.md", "references/common/model-and-effort.md"],
      "trust-dialog": ["references/common/control-and-recovery.md"]
    },
    "trust": {"default": ["references/common/control-and-recovery.md"]},
    "skill": {"default": ["references/common/control-and-recovery.md"]},
    "interrupt": {"default": ["references/common/control-and-recovery.md"]},
    "exit": {"default": ["references/common/control-and-recovery.md"]},
    "resume": {"default": ["references/common/control-and-recovery.md"]},
    "recovery": {
      "default": ["references/common/control-and-recovery.md"],
      "replacement-profile": ["references/common/control-and-recovery.md", "references/common/dispatch.md", "references/common/model-and-effort.md"],
      "secondmate": ["references/common/control-and-recovery.md", "references/common/primary-hooks.md"],
      "replacement-secondmate": ["references/common/control-and-recovery.md", "references/common/dispatch.md", "references/common/model-and-effort.md", "references/common/primary-hooks.md"]
    },
    "primary": {"default": ["references/common/primary-hooks.md"]},
    "model-effort": {
      "default": ["references/common/model-and-effort.md"],
      "configured-profile": ["references/common/model-and-effort.md", "references/common/dispatch.md"]
    },
    "verify": {"default": ["references/common/dispatch.md", "references/common/control-and-recovery.md", "references/common/primary-hooks.md", "references/common/model-and-effort.md"]}
  },
  "harnesses": {
    "claude": "references/harness/claude.md",
    "codex": "references/harness/codex.md",
    "opencode": "references/harness/opencode.md",
    "pi": "references/harness/pi.md",
    "pi-signed": "references/harness/pi.md",
    "grok": "references/harness/grok.md",
    "kimi": "references/harness/kimi.md",
    "cursor": "references/harness/cursor.md",
    "gemini": "references/harness/gemini.md",
    "muse": "references/harness/muse.md",
    "rovo": "references/harness/rovo.md",
    "omp": "references/harness/omp.md",
    "agy": "references/harness/agy.md",
    "devin": "references/harness/devin.md"
  }
}

© kunchenguid, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 17 other files (references) in .agents/skills/harness-adapters of kunchenguid/firstmate.

• SKILL.md
• references/common/control-and-recovery.md
• references/common/dispatch.md
• references/common/model-and-effort.md
• references/common/primary-hooks.md
• references/harness/agy.md
• references/harness/claude.md
• references/harness/codex.md
• references/harness/cursor.md
• references/harness/devin.md
• references/harness/gemini.md
• references/harness/grok.md
• references/harness/kimi.md
• references/harness/muse.md
• references/harness/omp.md
• references/harness/opencode.md
• references/harness/pi.md
• references/harness/rovo.md

Open the folder on GitHubat commit 19fcbbd