[Windows] POSIX path conversion mangles slash-prefixed CLI args under Git Bash

[mariohe0007]

Summary

On Windows, when the codex-companion runtime is invoked from a Git Bash
(MSYS2) shell, arguments that look like POSIX absolute paths (e.g. a PID
passed as /12345, or flags like /codex:cancel) get auto-translated by
MSYS's path-conversion layer into C:/Program Files/Git/12345, which
breaks the call.

Reproduction

Environment:

• Windows 10 / 11
• Git for Windows (MSYS2-based bash)
• @openai/codex-plugin-cc 1.0.5

Steps:

1. From Git Bash, start a background Codex job and obtain its job id.
2. Run /codex:cancel <pid> where <pid> is passed as /12345.
3. Observe that the call fails — the argument received by the runtime is
   C:/Program Files/Git/12345, not /12345.

Workaround

Set MSYS_NO_PATHCONV=1 in the user's shell profile (~/.bashrc for Git
Bash; $PROFILE for any PowerShell session that may spawn Git Bash
sub-shells). This globally disables MSYS path conversion for the session.

Suggested fix

Either:

• Have the plugin's wrapper script set MSYS_NO_PATHCONV=1 (or use the
  per-arg MSYS2_ARG_CONV_EXCL=* form) when spawning child processes on
  Windows, scoped narrowly so it does not pollute the parent shell, or
• Document the requirement explicitly in the README's Windows section.

Happy to send a PR if the maintainers prefer the wrapper-level fix.

[CBEPX]

Fixed in CBEPX/codex-plugin-cc v1.4.0 (https://github.com/CBEPX/codex-plugin-cc/releases/tag/v1.4.0): commands are no longer spawned through $SHELL (Git Bash) on Windows — executables are resolved directly with where.exe and launched with shell:false — so Git Bash's MSYS path/argument conversion can no longer rewrite a slash-prefixed CLI argument before it reaches the target process; same root cause as #708, upstream PR #735 used as reference, thanks @mohammad-malik.

claude plugin marketplace add CBEPX/codex-plugin-cc && claude plugin install codex@cbepx

This is a fork release, not an upstream fix, so I'm leaving this issue open for the maintainers here.