[adit-chandra]

Motivation

When a marketplace update removes a plugin version still referenced by a running session, Python exits with code 2 before the hook adapter starts. Codex interprets that infrastructure failure as an intentional hook block, potentially hiding the result of a command that already ran.

Summary

Embed a Python launcher in portable hook commands so it survives deletion of plugin files. Portable context hooks now report bounded failure diagnostics and exit successfully; native JSON hooks retain their authored blocking semantics. Execution remains in-process so cancellation reaches handlers.

Stack: this PR targets main; #106 adds retained runtime bundles on top, and #107 separates installation from current-session activation.

Validation

• Full suite: 1,053 passed.
• Focused hook suite: 59 passed, covering deleted adapters, entrypoints and helpers across Claude, Codex and Cursor; script exit 2; and native blocking behavior.
• Repository-wide Ruff lint/format and ty passed (using the worktree environment).
• Generated commands exercised in local subprocesses; live desktop-host acceptance and marketplace publication are not part of this PR.

[github-actions]

Codex Bug Bot

No new bugs detected in this PR.