CRLF line endings in .claude hook files caused claude-code SessionStart
hooks to fail silently on Windows checkouts — python3 received a filename
ending in '\r' (e.g. 'session-start-context.py\r'), failed with ENOENT,
and the claude-code query short-circuited with result='' across every
A2A call. Observed symptom: all 22 agents returned '(no response
generated)' on every pulse despite the model never being called
(input_tokens=0, output_tokens=0).
Existing *.sh rule covered the shebang line; adding *.py covers the
Python hook target that the shell script invokes. Shipped alongside
the same fix in molecule-ai-plugin-molecule-session-context (which
is the primary source of these hooks via the platform plugin loader).
Fixes#507
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>