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Renn F
417b8c5f29
Smoke-7 surfaced: be-qa called dm(recipient='qa-all', ...) — 'qa-all'
is a channel slug, not an agent. A2A enforcement raised
A2AAccessDeniedError. It propagated past dm(), past content_actions,
got caught by FastAPI middleware which renders RobocoError.to_dict()
as {'error': {'code': ..., 'message': ..., 'details': ...}} — a
DICT-shaped 'error' field.
do_server's circuit-breaker check (and flow_server's mirror) did
`payload.get('error') in _CIRCUIT_REJECTION_KINDS` — trying to hash
a dict against a frozenset → `TypeError: unhashable type: 'dict'`.
The agent saw "Error executing tool dm: unhashable type: 'dict'"
and got stuck calling dm in a loop.
Two-layer fix:
1. content_actions.dm now catches A2AAccessDeniedError and returns
Envelope.not_authorized with the original reason + route_hint as
remediate. This is the right shape — content tools always emit
Envelopes; RobocoErrors escaping to the middleware is a bug.
2. Defense-in-depth: do_server._record_and_check_circuit and
flow_server._record_and_check_circuit now guard against non-string
error fields. Any future RobocoError-leak that bypasses (1) will
pass through untouched instead of crashing the tool call.
3 new tests pin the contracts:
- dm A2A denial returns Envelope.not_authorized (not propagated)
- do_server circuit-breaker doesn't crash on dict-shaped errors