3-surgeons: Instructions file for Gemini CLI

3-Surgeons for Gemini

Three AI surgeons. One operating table. Your code doesn't ship until all three agree.

Setup

1. Install the extension

gemini extensions install https://github.com/supportersimulator/3-surgeons

2. Install Python runtime

Python 3.10+ is required. The MCP server auto-bootstraps on first launch, but you can install manually:

cd ~/.gemini/extensions/3-surgeons   # or wherever Gemini places extensions
python3 -m venv .venv
.venv/bin/pip install -e '.[mcp]'

3. Configure surgeon backends

Copy a preset to your home config:

# Hybrid (default) — OpenAI cardiologist + local Ollama neurologist
cp config/presets/hybrid.yaml ~/.3surgeons/config.yaml

# API-only — OpenAI + DeepSeek, no local model needed
cp config/presets/api-only.yaml ~/.3surgeons/config.yaml

# Local-only — all Ollama, $0 cost, fully private
cp config/presets/local-only.yaml ~/.3surgeons/config.yaml

4. Set API keys (if using API-backed surgeons)

# For hybrid or API-only mode
export OPENAI_API_KEY="sk-..."

# For API-only mode (DeepSeek neurologist)
export DEEPSEEK_API_KEY="sk-..."

Add these to your shell profile (~/.zshrc, ~/.bashrc) so they persist across sessions.

5. Verify

In Gemini, run the probe tool to confirm all three surgeons are reachable:

Use the probe tool to check surgeon connectivity

Expected: all three surgeons report OK with model names and response times.

Alternative: Manual MCP configuration

If the extension install does not wire MCP automatically, add this to your Gemini settings (~/.gemini/settings.json):

{
  "mcpServers": {
    "3-surgeons": {
      "command": "/ABSOLUTE/PATH/TO/3-surgeons/bin/3surgeons-mcp",
      "args": []
    }
  }
}

Replace /ABSOLUTE/PATH/TO/3-surgeons with the actual path where you cloned the repo.

Available tools

Once connected, these MCP tools are available in Gemini:

Tool	What it does
probe	Verify all three surgeons are reachable
cross_examine_start	Begin a 3-phase cross-examination on a claim
cross_examine_deepen	Phase 2: surgeons challenge each other's findings
cross_examine_synthesize	Phase 3: final synthesis with confidence scores
consensus	Quick confidence-weighted vote from multiple surgeons
sentinel_run	Scan for complexity risks across configurable dimensions
ask_local_tool	Query the local neurologist directly
ask_remote_tool	Query the remote cardiologist directly
research_tool	Self-directed multi-surgeon research on a topic
cardio_review_tool	External-model cross-examination review
neurologist_pulse_tool	Local model health check
neurologist_challenge_tool	Corrigibility challenge from the neurologist
introspect_tool	Surgeon capability introspection
gains_gate	System health and safety invariant checks
ab_propose	Propose an A/B test
ab_start	Start a proposed A/B test
ab_measure	Measure A/B test results
ab_conclude	Conclude an A/B test with surgeon consensus