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
Smoke-6 surfaced the gap. main-pm called note(scope='decision') with
context: null 8 times in a row — every one returned incomplete_input
and the agent kept retrying. The flow_server had a breaker (C1) but
do_server didn't, so content-tool rejections went uncapped.
Mirror the flow_server pattern:
- _CIRCUIT_REJECTION_KINDS = {tracing_gap, invalid_state,
not_authorized, incomplete_input} (same set)
- _record_and_check_circuit posts to the SDK's /verb/attempted on each
counted rejection
- When the SDK reports open=true, the original rejection envelope is
REPLACED with the circuit_open envelope so the agent stops retrying
The SDK side (agent_sdk/server.py) already accepts arbitrary verb
names; no changes there. note hits the default cap of 3 retries / 60s
from foundation.agent_loop. After the third incomplete_input the
agent gets circuit_open and the loop ends.
9 new tests pinning the contract.
Renn F