giles ff6c379942 W14: pin C1/C1b command-channel crash guards (test-only) ...

Pre-fix, one malformed or non-ASCII line on sx_server's top-level command
channel raised an uncaught Parse_error and killed the whole shared process
(bridges + conformance runners). dc7aa709 guards the parse; the server now
answers (error N "Malformed command line: ...") and keeps serving.

Add scripts/test-protocol-gate.sh: per case, spawn a fresh timeout-bounded
sx_server.exe (never touches a shared process) and assert the error
response, the follow-up epoch still evaluating, and a clean exit. Cases:
C1 unterminated list + garbage line, C1b non-ASCII byte (exact review
repros from plans/sx-review/hosts.md), plus a well-formed control. 4/4
green. Structured to grow into W14 section E's protocol fuzz suite (C3-C7).

Test-only: no semantics edits, no push.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

2026-07-04 00:28:57 +00:00

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