subagent: seed inherited policy events at creation

The parent implementation introduced sandboxMode and approvalPolicy as generic SessionHeader fields, then propagated those fields through both persistence backends, session-query indexes, collision checks, policy-specific seed-boundary folds, catalogs, and a broad test matrix. That storage plane is unnecessary: Session already accepts a validated constructor seed, and persistence captures that seed when the session is announced before committing its first batch.

Capture each parent override synchronously at delegation, append source-tagged sandbox/mode and approval/policy records after the optional fork prefix, and create the child with that combined seed. Keeping header.seedLength at the original fork-prefix length preserves lineage while ordinary last-event-wins folds make the inherited records outrank stale parent history and remain subordinate to later child switches. Unswitched parents still stamp nothing, so children continue to follow deployment defaults.

Remove the generic header fields and every persistence/query/schema branch built around them. Collapse the inheritance suite from ten leaking scenarios to four owned-context cases covering real filesystem confinement, stale fork precedence, delegation-time capture, and the no-override path. The assembled headless snapshot now asserts the persisted inheritance event directly.

This keeps the security behavior while restoring policy ownership to the existing event log and deleting the speculative durability machinery that the original tests did not exercise.

This commit is contained in:

Tianyi Cui

2026-07-28 21:31:17 +08:00

parent afa38c4b2f

commit cfceb8452b

55 changed files with 415 additions and 1371 deletions

									
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				# side as of the last confirmed-consistent state. Both languages carry equal authority;

				# after editing either side, bring the other along and re-record with:

				#   pnpm run verify-translation-pairing --write docs/core-data-structures/persistence.md

				persistence.md: 6238182a9d570852bc1ba6e89de90427aa625b99

				persistence.zh.md: 414454dd19131a07876620e9c1e3232e155e9ccf

				persistence.md: 5a660e17d6f498213564ca7d68dc4d7a615ba1de

				persistence.zh.md: b5477cfc8242f9db47c2c6e40bd63f1b3683ace9