Use when a Codex CLI/Desktop root should fan out subagents, delegate to Pixir workers, run parallel workers, or manage a resident delegation daemon via Pixir Delegate; covers Codex preflight, AGENTS.md, approvals/sandbox, dry-run, daemon start/status/attach/cancel, closure evidence, and audited single-run execution (one bounded pixir run with an evidence bundle and verdict).
Use Pixir as a headless subagent runtime from Claude Code or any harness with skill `!` preprocessing (Codex roots and other no-hydration hosts use pixir-delegate-codex instead) — one-shot workers (`pixir --json`), parallel fan-out to N children (`pixir delegate --spec`), resumable steering (`pixir resume`), evidence drill-down. Use when the user wants to fan out subagents or parallel workers, delegate analysis or bounded coding tasks to GPT/OpenAI models, run cheap background workers, or steer and retry a worker across turns.
Delegate work to subagents from INSIDE a Pixir session using the native Subagent tools (spawn_agent, wait_agent, close_agent, list_agents, send_input) instead of shelling out to the pixir CLI. Use when you are a Pixir session that needs to fan out parallel workers, steer a child, or run skill-backed workflow templates — in-VM, without spawning nested pixir processes.
Diagnose Pixir and T3 Code Pixir incidents from local canonical evidence. Use when a Pixir run, ACP/T3 thread, subagent/workflow, provider replay, or daily-driver dogfood session appears stuck, inconsistent, missing tool output, or hard to classify.
Run a no-network read-only review practice with two explorer steps and one synthesis step.