npm puts a Unix shell script with the bare name (codex-acp,
claude-code-acp, gemini) beside the .cmd shim. The lookup tried the bare
name first, so every npm-installed agent failed with "not a valid Win32
application (os error 193)". Windows now only considers .exe/.cmd/.bat,
and a command saved with the bare path runs the shim beside it.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
(cherry picked from commit 60ea8c69d2)