In serve/chat mode, Ctrl-C during generation killed the whole engine, losing
the loaded model and forcing a full reload. Now a SIGINT handler (armed only
in run_serve / run_serve_mux) sets a flag that spec_decode's token loop treats
exactly like hitting the NGEN cap: the turn ends through the normal path, so
the END sentinel, STAT line, usage_save and KV append all run — and :more can
continue the interrupted answer. The mux loop closes in-flight requests via the
same mux_done path. One-shot ./glm runs and Windows keep default SIGINT (die).
coli: stream_turn survives the first KeyboardInterrupt, forwards SIGINT to the
engine (covers non-TTY), drains to the turn boundary, and reports it. A second
Ctrl-C quits. Help line and per-turn footer updated.
POSIX only (sigaction); no behaviour change on Windows. Verified end-to-end on
Apple M4 + Metal: interrupt mid-decode, engine stays up, next prompt answers,
:q exits 0.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Skeldoor
3745cc680e