Bug: 'tell me a haiku about flowcharts' matched send_chat with
target='me a haiku' / body='flowcharts', producing the bogus
"I don't know who 'me a haiku' is" reply and silently swallowing
all non-tool prompts that started with tell/ask. The LLM fallback
never ran, so [llm] telemetry from wave 3 never fired in tests.
Fix: tighten the matcher to require a single-word [A-Za-z]+ name
between the verb and that/about/:. Drop the substring search in the
directory; require an exact match. Now 'tell me a haiku about X'
falls through to llmFallback as intended.
Investigation: the wave-3 [llm] telemetry warns weren't firing on live
because the fetch had no client-side timeout. When demo's
llm-integration-service was slow/stuck, fetch hung indefinitely past
the test's 12s wait, so the fallback path never ran and the user saw
no agent reply at all.
Add a 12s AbortController-backed deadline. On timeout: console.warn
'[llm] gateway timed out after Xms (deadline 12000ms)' + return the
graceful 'temporarily unavailable' fallback that renders the tool
menu in the chat surface. Uses AbortSignal.any when available to
preserve any caller-supplied signal.
canvas-bot