fix(subagent): inherit parent policy overrides in continuable children

A continuable background child (the default backgroundMode for both
delegation tools) never received the parent session's explicit
sandbox/approval overrides: materialization applied only child
composition, so a danger-full-access parent produced workspace-write
children whose every out-of-workspace operation raised an approval
prompt.

Move the one-shot driver's capture/append pair into the shared
child-agent module (captureDelegatedPolicyOverrides /
appendDelegatedPolicyOverrides) and call it from both paths:
startContinuable captures before its first await, only fresh
materialization appends the source-tagged events (after any fork seed),
and a cold resume replays the persisted delegation events instead of
re-capturing the parent.

Adds the continuable inheritance unit suite, the ACP snapshot scenario
subagent-continuable-inheritance (fails without the fix), the
continuable policy-inheritance Agent Note, and the seam-level README
contract, with bilingual counterparts.

Fixes #1692
This commit is contained in:
Hypatia May
2026-08-10 12:16:19 +08:00
parent abaf8f5061
commit 64e0fbfd6d
36 changed files with 1106 additions and 61 deletions

View File

@@ -2,5 +2,5 @@
# 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/subsystems/subagent.md
subagent.md: 99c54e0696c9c3585c50285ecb69b14c90d83c11
subagent.zh.md: c5a79247a81f5174662f2b5d1ed2d3c20cf6c672
subagent.md: b554bb20180b8784e38ac14fb83769eb354b53ae
subagent.zh.md: 14e2b9b3e571c97384ccf560ce23edbeda62a305