Antigravity Subagents Skill

This skill allows you to dispatch autonomous sub-agents to perform tasks. It features a Manager layer (planner.py) that can automatically design a team of agents for a complex mission, and an Orchestrator (orchestrator.py) to run them visually. Both scripts include a Plan Mode (confirmation step) by default to prevent accidental usage limits consumption.

[!WARNING] Do NOT modify files in this directory while the Orchestrator is running. The system actively reads and writes to task_plan.md, findings.md, and subagents.yaml. Manual edits during execution may cause race conditions or inconsistent agent behavior.

🛠 Tools

dispatch_subagent

Runs a sub-agent with a specific task.

Usage: Use this when you have a parallelizable task or need to offload a specific job (e.g., “Write a test file”, “Analyze this directory”).

Arguments:

• task: A clear, self-contained description of what the sub-agent should do.

Implementation Details: The sub-agent is powered by the gemini CLI. A Python wrapper intercepts specific output patterns to perform file system operations and command executions.

Syntax used by Sub-Agent (Handled Automatically):

• <<WRITE_FILE path="...">>...<<END_WRITE>>
• <<RUN_COMMAND>>...<<END_COMMAND>>

run_mission (Dynamic Orchestration)

Analyzes a high-level goal, hires a custom team of sub-agents, and creates a configuration for them.

Usage: Use this for complex, multi-step projects where you don’t want to manually define every sub-agent.

Arguments:

• mission: A description of the overall project (e.g., “Create a Snake game in Python”).

How it works:

1. Calls scripts/planner.py to generate subagents.yaml. (Will prompt for confirmation unless --yes is used).
2. (Optional) You can then run scripts/orchestrator.py to execute the team. (Will prompt for confirmation unless --yes is used).

Usage Modes

Mode 1: CLI User (Terminal Visualization)

Run the Python orchestrator in your terminal to see a TUI.

python scripts/orchestrator.py

Mode 2: IDE Agent (Chat Visualization)

As an Agent, you act as the Orchestrator.

1. Spawn: Use run_command to launch sub-agents in the background. Use --format json for logs.

   python scripts/dispatch_agent.py "Task A" --log-file logs/agent_a.json --format json &
   python scripts/dispatch_agent.py "Task B" --log-file logs/agent_b.json --format json &
   

2. Monitor: Poll the JSON log files to check for {"type": "status", "content": "completed"}.
3. Visualize: Render a Markdown dashboard in your chat response to the user.

🚀 Examples

1. Manual Dispatch (Single Agent)

run_command("python3 scripts/dispatch_agent.py 'Create a file named hello.py that prints Hello World'")

2. Auto-Hire a Team (Mission Mode)

# 1. Generate the team
run_command("python3 scripts/planner.py 'Create a fully functional Todo List app in HTML/JS'")

# 2. Run the team
run_command("python3 scripts/orchestrator.py")

[!WARNING] You must use gemini-3-pro or gemini-3-flash. Deprecated or older models may not support the file shim protocol correctly.

❓ FAQ & Philosophy

Why Sub-agents?

1. Context Isolation: Prevents “Context Contamination.” A UI Specialist doesn’t need to see specific Database Migration code. Separation ensures higher accuracy.
2. Scalability: While loop-based agents process sequentially, Sub-agents are architected to run in parallel threads.
3. Fault Tolerance: If one sub-agent fails (e.g., Syntax Error), it doesn’t crash the entire mission; the Orchestrator can retry just that agent.

Is this truly parallel?

Yes. orchestrator.py uses Python’s threading.Thread to spawn separate OS processes for each agent. Note: You may perceive sequential behavior if the underlying gemini CLI tool enforces a global lock or if you hit API Rate Limits.

Planning with Files (Manus Protocol)

This skill adheres to the “Manus” state management philosophy. All agents operate on a shared set of “Memory Files” in the root of the workspace:

1. task_plan.md: The Source of Truth for the mission checklist.
2. findings.md: A shared scratchpad for discoveries and research.
3. progress.md: A log of completed steps and current status.