The first cut asserted against the REAL tools.process_registry.format_process_notification,
which isn't importable in WebUI-only CI shards (shard 2 failed: returned None).
Inject a stub agent module via sys.modules so the test validates the delegation
WIRING independent of agent-module availability, plus a graceful-degradation
test confirming async_delegation returns None (not raise) when the agent
formatter can't be imported. Production behavior is unchanged: async_delegation
events only occur when the agent is running, so the import resolves where the
events actually exist.
format_wakeup_prompt() in api/background_process.py returned None for any event
type other than 'completion'/watch_*, so async_delegation events (produced when
a background delegate_task subagent finishes) were silently dropped — the
subagent showed as perpetually 'running' and its consolidated result never
re-entered the parent conversation.
Add an async_delegation branch that delegates to the agent-side
tools.process_registry.format_process_notification (which already knows the
async_delegation shape), so the subagent result is rendered into the wakeup
prompt and re-enters chat. Scoped to async_delegation specifically (not all
unknown types) so genuinely-unrecognized events are still skipped — preserving
the existing skip-unknown-event contract.
Reported + root-caused by @mydelren.
Co-authored-by: mydelren <mydelren@users.noreply.github.com>
nesquena-hermes