castmate

72 / 100 · Review before installing

Check before installing. Some of what it can do is expected: a coding skill usually runs build and test commands.

By coreyhaines31/makerskills (GitHub) · coding · 905 stars · scanned at commit b465319

When you want to pull in the right AI model for the right job: hand a task to another agent CLI (Codex, Claude, Gemini, Grok, Amp, OpenCode, Cursor, Kiro, Antigravity), or send one prompt to several at once for independent opinions, then synthesize. Delegate mode gives one castmate the job, optionally with write access ('have codex write the migration'). Fan-out mode runs read-only reviews in parallel. Rounds mode lets castmates build on and challenge each other's findings. Calls the official C…

Works with any agent that supports SKILL.md skills.

What this skill can do

Runs commands on your computer

This is disclosed by the author in the skill's SKILL.md or README. Expected for a coding skill.

Found in 12 places.

skills/castmate/SKILL.md, line 15python3 <skill-dir>/scripts/castmate.py list # castmates, groups, install + read-only status
skills/castmate/SKILL.md, line 81python3 <skill-dir>/scripts/castmate.py run -c <castmates> -f <prompt-file> [--write] [--cwd <repo>] [--timeout 540] --json
skills/castmate/scripts/castmate.py, line 218except subprocess.TimeoutExpired:

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skills/castmate/scripts/castmate.py, line 236proc = subprocess.Popen(
skills/castmate/scripts/castmate.py, line 240stdin=subprocess.PIPE if inv["stdin"] is not None else subprocess.DEVNULL,
skills/castmate/scripts/castmate.py, line 257except subprocess.TimeoutExpired:
skills/castmate/scripts/test_castmate.py, line 24child = subprocess.Popen([sys.executable, "-c", "import time; time.sleep(120)"])
skills/castmate/scripts/test_castmate.py, line 69return subprocess.run([sys.executable, str(SCRIPT), *args], env=env, capture_output=True, text=True, timeout=120)
skills/castmate/scripts/test_castmate.py, line 144proc = subprocess.Popen([sys.executable, str(SCRIPT), "run", "-f", str(self.prompt), "--out", str(self.tmp / "out"), *args],
skills/castmate/scripts/test_castmate.py, line 145env=env, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)
skills/castmate/scripts/test_castmate.py, line 176proc = subprocess.Popen([sys.executable, str(SCRIPT), "run", "-c", "e", "-f", "-"], env=env,
skills/castmate/scripts/test_castmate.py, line 177stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.PIPE, text=True)

Downloads and installs other software

The author does not mention this.

Found in 5 places.

skills/castmate/references/cli-setup.md, line 49curl -fsSL https://claude.ai/install.sh | bash # or see docs.anthropic.com/en/docs/claude-code
skills/castmate/references/cli-setup.md, line 62npm install -g @openai/codex
skills/castmate/references/cli-setup.md, line 79npm install -g @google/gemini-cli

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skills/castmate/references/cli-setup.md, line 108curl -fsSL https://antigravity.google/cli/install.sh | bash
skills/castmate/references/cli-setup.md, line 1301. Install OpenCode: `brew install opencode`.

Sends data to these websites: claude.ai, antigravity.google

The author does not mention this.

Found in 4 places.

skills/castmate/references/cli-setup.md, line 49curl -fsSL https://claude.ai/install.sh | bash # or see docs.anthropic.com/en/docs/claude-code
skills/castmate/references/cli-setup.md, line 108curl -fsSL https://antigravity.google/cli/install.sh | bash
skills/castmate/references/tools.json, line 26"Read,Glob,Grep,WebFetch,WebSearch",

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skills/castmate/references/tools.json, line 28"Read,Glob,Grep,WebFetch,WebSearch",

Changes files outside its own folder

This is disclosed by the author in the skill's SKILL.md or README.

Found in 1 place.

skills/castmate/references/cli-setup.md, line 117- **Picking a model:** the `antigravity` castmate uses `gemini-3.8-flash-high`. If `agy models` lists a model you prefer, add an alias in `~/.config/makerskills

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'castmate' ] || [ -L ~/.agents/skills/'castmate' ]; then echo 'A skill folder named castmate already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/coreyhaines31/makerskills' "$d" && git -C "$d" checkout --quiet 'b465319a5e675a89ea9fd87a15191c9a8ad13649' -- 'skills/castmate' && mkdir -p ~/.agents/skills && cp -R "$d"/'skills/castmate' ~/.agents/skills/'castmate' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'castmate' ~/.claude/skills/'castmate' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

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Score history

Date	Version	Score
2026-11-10	`b465319`	72
2026-11-08	`0f20eaf`	72
2026-11-07	`0f20eaf`	72