Root cause of the 2m8s hang (which matched ResponseHeaderTimeout=180s):
httptest's Hijack() discards the buffered writer, losing any bytes written
via w.WriteHeader/w.Write that weren't already flushed to the raw TCP conn.
The HTTP client therefore never receives response headers, blocking on
ResponseHeaderTimeout (3 min).
Fix: write the raw HTTP response directly to the raw conn AFTER Hijack(),
completely bypassing httptest's buffered writer. This ensures:
- Response headers reach the client immediately (not lost to buffered writer)
- Client starts reading the response body
- conn.Close() fires while client is mid-read → Read() returns EOF/error
- executeDelegation completes in seconds, not minutes
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Molecule AI Core-BE
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