claude-pi-orchestrate

Pi Orchestration

Model Tiers

Tiers are populated from the [pi-models] notification at session start.

Tier	Examples	Use when
fast	gemini-2.0-flash, claude-haiku-4-5, gpt-4o-mini	Formatting, boilerplate, mechanical transforms
balanced	gpt-4o, claude-sonnet-4-6, o3-mini	Standard coding, analysis, research
frontier	gemini-2.5-pro, claude-opus-4-7, o3	Novel reasoning, architecture, state-of-the-art tasks

Model keys use provider/id format when calling tools:

• google/gemini-2.5-pro (frontier)
• google/gemini-2.0-flash (fast)
• anthropic/claude-haiku-4-5 (fast)
• openai/gpt-4o (balanced)

Session-Start Awareness

At session start, Claude receives a [pi-models] notification from the monitor. Two forms:

• [pi-models] Available: <model> (<tier>), ... — use pi_list_models to refresh — use the listed models
• [pi-models] No models available — configure Pi auth with \pi auth` or set provider env vars` — no Pi available, handle locally

If no [pi-models] notification arrived, call pi_list_models before delegating; if that also fails, handle the task locally.

Always use the models listed in the notification. Do not assume availability of unlisted models.

When to Delegate

Delegate when ALL of these are true:

• Task is independent of current conversation context
• Task is mechanical, repetitive, or parallelizable
• A cheaper or more capable model is better suited
• Subtask runtime is likely > 30s (below this, Pi startup overhead isn't worth it)

Do NOT delegate when:

• Task requires reasoning about this specific conversation
• Task needs Claude's own tools (Bash, Edit, Write, Read, etc.)
• Task is trivially short (< 30s estimated runtime)

Tool Reference

Tool	Purpose
pi_list_models	Refresh available models
pi_run_task	Run task and wait for result (blocking)
pi_spawn_agent	Spawn agent, returns session_id immediately
pi_steer_agent	Send mid-task steering message (delivered after current turn)
pi_followup_agent	Queue non-interruptive message (delivered after agent finishes)
pi_poll_agent	Check status and partial output
pi_get_result	Wait for spawned agent to finish
pi_terminate_agent	Abort a running agent

Message Delivery

• steer: Interrupt-style. Sent to running agent, delivered after the current assistant turn finishes its tool calls. Use for corrections, pivots, or priority changes mid-task.
• followUp: Non-interruptive. Queued until the agent finishes all work. Use when you do not want to disturb the agent at all.

When using pi_run_task or pi_spawn_agent, pass followUp: true to queue the task as a follow-up rather than an immediate prompt.

Parallel Pattern (primary)

1. pi_spawn_agent × N  → get N session_ids
2. pi_poll_agent loop  → check progress, steer if going off-track
3. pi_get_result × N   → collect final outputs
4. synthesize          → combine results in this session

Cap parallel spawns at 6. Beyond that, provider rate limits and context overhead from tracking session IDs and partial outputs outweigh the parallelism gains. For larger batches, spawn in waves of 6, collect results, then spawn the next wave.

Use pi_run_task only for single-task, time-bounded work where you need the result before continuing.

Steering Rule

Poll running agents for long tasks. If output is going off-track, call pi_steer_agent immediately with a correction message. If steering is insufficient, call pi_terminate_agent and respawn with a more precise task description.