A multi-harness plugin from the not-my-job marketplace. Primary host: Claude Code. Also designed to work when the skill is loaded from Codex, Grok Build, OpenCode, or agy.

What it does

Delegates a task to peer AI CLIs in parallel. Second opinions on architecture, research across model families, security audits, design reviews.

Grounding (Skeptical Colleague + Goal Cards):

• Goal Cards at .braintrust/goal-cards/<slug>.md with a session_anchor
• 6-step protocol: restatement, assumptions, evidence, fidelity, honesty, GROUNDED / NOT GROUNDED
• Host actively curates context before delegating (not "whatever is in the chat")

Members (v1.10)

Slot	CLI	Notes
Anthropic	Claude	Task tool inside Claude Code; claude -p from other hosts
Google	agy only	No Gemini CLI. Account-tier model; optional --model
OpenAI	Codex	gpt-5.6-sol (GPT-5.6 Sol); isolated CODEX_HOME + --ignore-user-config; CLI ≥ 0.144.0
xAI	Grok	Default model grok-4.5
Multi	OpenCode	User's configured/default model (probe discovers)

Up to five independent voices when everything is installed and authenticated. Availability is decided by scripts/bt_probe.sh, not by preference.

Commands

Command	What it does
/braintrust	Orchestrate a task across peer CLIs
/consult	Alias for /braintrust

v1.10.0 Highlights

• Codex primary model: GPT-5.6 Sol (gpt-5.6-sol). Explicit -m because consults use --ignore-user-config (user config model pin is ignored).
• Probe prefers Sol, falls back to product default if Sol is unavailable, and records bt_codex_model.
• Documented minimum Codex CLI 0.144.0+ for Sol (npm i -g @openai/codex@latest).

Earlier (v1.9)

• Hybrid always-on skill (eval-backed); Gemini CLI removed; OpenCode user-default model discovery
• Grok default grok-4.5; Codex clean CODEX_HOME + --ignore-user-config
• Multi-host matrix; durable evals under evals/

Requirements

All peers optional; braintrust uses whatever the probe authenticates.

• Claude Code
• Antigravity CLI (agy) — curl -fsSL https://antigravity.google/cli/install.sh | bash
• Codex CLI — ≥ 0.144.0 for GPT-5.6 Sol (npm i -g @openai/codex@latest)
• Grok Build — curl -fsSL https://x.ai/cli/install.sh | bash
• OpenCode — with an authed provider; set "model" in ~/.config/opencode/opencode.json so headless matches your TUI default

jq required for Codex / Grok / OpenCode JSON parsing.

Install

claude plugins install braintrust@not-my-job

Refresh / dogfood / evals

bash scripts/bt_probe.sh
bash evals/run_eval.sh matrix all agy,codex,grok,opencode
# deeper harness drift notes: skills/braintrust/references/self-improvement.md

License

MIT