Continue retained native operation strands across host recovery

[flyingrobots]

Goal

Continue a retained alternative on its original native strand, preserving fork ancestry, observations and operation outcomes across process loss.

Plan

• Persist a bounded trusted-local AuthorOnly fork profile through the native topology WAL record and restore forked prefixes from source history.
• Expose two native lanes, lane selection and bounded ancestry readings in the executable-operation host.
• Corroborate a recovered parent independently of the next writer's head identity.
• Finish mutation calibration and the external consumer's retained interactive results.
• Complete upstream CI and review.

Current status

Stacked on #727 (feature/observation-bound-actions), not main. The original consumer calibration was pinned to e364510. Seven checks in one scripted Edict consumer schedule passed, including a fresh-process reopen. The review-updated branch passes all 42 host integration tests and 126 WAL hardening tests (one helper entry point ignored). Parent review fixes were propagated by normal merges; original consumer calibration results remain pinned to their original source.

A clean confirmation passes all seven checks; the prior nine-check communication loop also passes against the same executable. Three deliberately incorrect variants were caught: collapsed lanes, omitted fork recovery, and an adaptation failing the new fallback requirement. Source was restored exactly after calibration.

The native host retains the original candidate and its observations while a later operation advances the same losing worldline. Application selection is an append-only Edict mark naming a worldline and commit; it is not merge, promotion, or atomic cross-worldline selection-policy enforcement. The driver creates two fixed strands after one durable bootstrap operation. No authenticated service, LLM efficiency, or braid-settlement claim.

Canonical behavior and limitations are in docs/architecture/application-contract-hosting.md; CHANGELOG records the extension. Telepathy's interactive consumer record is under docs/sandbox/retained-strands/ and remains separate from the unrun effectiveness comparison.

Open questions

Review the bounded local authority profile, fork-prefix recovery validation, and the change allowing a parent commit authored by a different writer on the same worldline.

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[flyingrobots]

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