Approval friction (harmless commands kept prompting):
- Persist "Allow for this session" grants to approval_allowlist.yaml under a
new sessions scope (capped LRU), hydrated lazily, so they survive `opc ui`
restarts and re-entering the session instead of living only in memory.
- Safe-prefix matching now accepts compound read-only commands: every segment
must match a safe prefix, and fd-duplication / /dev/null redirections
(2>&1, 2>/dev/null) no longer disqualify a command; real write redirections
(>, >>, <) still do. Default safe prefixes gain common read-only commands
(cd, cat, head, grep, git log, ...).
- First-use approval now gates only MEDIUM+ risk; heuristically LOW actions
proceed without a card.
- Shell-substitution detection flags eval/source only at command position of a
segment (no more false positives on `grep source file`); $(...) and
backticks still flag anywhere.
Approval card timeout redesign (deferred decisions):
- The card's structured approval context (action, allowlist patterns, scopes)
now travels through the escalation event into the persisted card metadata.
- Timeout without a default action no longer marks the card timed out, and the
session-detail reconciler no longer stales deferred-capable cards: the card
stays pending and clickable indefinitely, including across restarts.
- Clicking after the inline wait expired applies the allowlist grant
(approve-once grants the exact command at session scope), resolves the card,
and rewrites the reply to target the parked AWAITING_HUMAN checkpoint so the
task resumes through the normal message pipeline and the retried command
auto-approves. With no parked checkpoint the grant still lands and a helper
reply explains the state.
Verified: approval engine suite (40) incl. new deferred-decision and
compound-command tests, ws_handler + runtime suites green, real escalated
commands from project 999 replayed against the user's config now auto-approve
while pip install / $(...) / rm -rf / write redirects still prompt.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
LZH-YS1998
c901800062