[xandreeddev]

What

• Add @xandreed/process-host with protocol version 1 over bounded stdio NDJSON. Hosts supply the Agent/TurnRunner, model and shared services; commands support begin, durable send/steer, helper answers, exact-turn cancellation, activity and shutdown.
• Emit lifecycle frames only after actual journal acknowledgments for direct, queued, initial task and parent-reaction turns. Progress uses an explicit projection by default, with full JSON export opt-in.
• Preserve accepted inputs across SIGTERM/SIGKILL and explicit takeover/resume. Keep native signal/hard-deadline handling independent of graceful work and scope finalizers. Ship peer conformance and a retained 45-frame protocol fixture.
• Register and document the new package, protocol error codes and process guide. Stored format 16 and its complete fingerprint/history remain unchanged.

Checks

• Repository typecheck, Foundry self-check and demo: pass, zero findings.
• bun test: 3,662 pass, 4 environment-dependent skips, 0 fail; 18,134 assertions across 315 files.
• Committed package build and packed Node/Bun consumers: pass; process-host peer kit and all 17 protocol/restart/deadline flags pass on both runtimes, alongside every prior recovery fixture.
• Immutable 45-frame protocol fixture: strict public-codec decode and 37 exact output round-trips pass on Node/Bun, including all projection and full variants.
• Generated docs: clean; stored format 16 and its complete fingerprint/history remain exact.
• Website: 16 pages checked, all internal links resolve.
• Models proxy checks on Bun 1.3.6: 46 pass, 2 environment-dependent skips, 0 fail.

Focused evidence covers held/lost journal acknowledgments, original successful receipts after output failure, real helper answer deferral/retries, responsive controls, bounded native output, shutdown deadlines and independently witnessed process restart. The default checks use scripted models without provider credentials.