Omar SobhandClaude Opus 5
1a244b7d32
The gate's rules were global: what no mission may do. This adds the
task-scoped half ActGov (arXiv 2609.24446) argues for — per-action
validation against the authorization boundary of the role making the
call — starting with the one role whose limit is structural: a verifier
that edits the thing it is verifying turns a failed check into a passing
one and reports success.
The enabling fact was measured before anything was built on it: Claude
Code 2.1.278 puts agent_type on a SUBAGENT's PreToolUse payload and
leaves it absent on the lead's (local probe: agent_type: prober,
agent_id: aacf093a). A policy keyed on a field that is not there is a
policy that never fires and looks installed — the failure this codebase
keeps paying for.
ROLE_POLICIES renders into the same guest script as the floor, so the
shell and the Rust predicate cannot disagree (the property
the_script_carries_every_rule already pins for the floor, now pinned for
roles too). Shell tests run the real generated script: the verifier's
Write is refused with rule=role-verifier-readonly and agent_type on the
record, the lead's identical Write is allowed, explorer is untouched, and
the verifier still reads and runs cargo test.
This is deliberately a second enforcer, not a replacement: the CLI's own
--agents tool list is the harness policing itself, and it silently did
nothing until 2.1.243 rejected the string form we were sending (cbc9c2d).
The harness now distinguishes 'never reached for a write' from 'the gate
refused one', which the tap alone could not say.
Co-Authored-By: Claude Opus 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01WZb5A2kfVfjpdwSochkuHz