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 packages/subagent/subagent-inprocess/README.md

				README.md: 95a45cd7a1f4510601f7f8d8bf396e7262f1a3cf

				README.zh.md: c20f5106d0009f9c5507e830361c0fcba54d6280

				README.md: 3606799e6d16e80473006f82b834a10953270914

				README.zh.md: 7f52d3699d1240f960e437d12bc48a152658cd15