Escript entry point — one-shot, print-first (ADR 0001). Commands:

pixir login              Browser OAuth (device-code fallback) → ~/.pixir/auth.json
pixir doctor             Run local first-run diagnostics (no network)
pixir tree <id>          Project a Session/Subagent tree from local Logs
pixir compact <id>       Record a durable History compaction checkpoint
pixir fork <id>          Create a child Session from a parent History prefix
pixir inspect-replay <id> Inspect Provider replay input without network
pixir delegate           Validate or run a Delegate CLI spec
pixir "prompt"           Run one Turn in the current directory, stream to stdout
pixir [--json] [--bash-timeout-ms N] --write-policy <policy.json> "prompt"
                         Run a bounded-write headless Turn with JSON output
pixir resume <id> "..."  Continue a persisted Session
pixir acp                Speak Agent Client Protocol over stdio (ADR 0009)
pixir help               Show help

Channel discipline (ADR 0005): the model's answer goes to stdout; prompts, activity, diagnostics, and the resumable session id go to stderr. A prompt may be passed as an argument or piped on stdin. Exit code is non-zero on error. --ask is intentionally interactive-only; headless orchestrators should use --read-only, explicit auto-mode approval, or a bounded write policy instead of silently denying every write prompt. --write-policy and --bash-timeout-ms are one-shot/resume runtime options: write policy requires auto mode, carries bounded write/edit allowlists into Subagents and Workflows, disables mutating shell commands in v1, and can pair with --json for one final machine-readable stdout envelope.