[Done] Brainstorm potential refactoring options.

[YiweiShen]

/codex --no-pr

[github-actions]

Action timed out after 600 seconds

[YiweiShen]

/codex --no-pr Do not overthink. First, identify the three obvious items we can work on.

[github-actions]

1. Break up runAction into phase-specific functions in src/github/runAction.ts.
   It currently owns reactions, title changes, progress comments, prompt prep, Codex run, result routing, and error paths; extracting clear phases (initialize, execute, finalize) would reduce complexity fast.

2. Consolidate duplicated GitHub event branching ('issue' in ..., 'pull_request' in ...) into shared helpers in src/github/types.ts, then reuse in src/github/comments.ts, src/github/progress.ts, src/github/reactions.ts, and src/github/runAction.ts.
   This is repeated all over and is an easy cleanup with immediate readability gains.

3. Refactor and dedupe result post-processing in src/github/result-handler.ts.
   There are defined-but-unused helpers plus duplicated logic for workflow/image cleanup and change filtering; centralizing that into one path is a straightforward win.

[YiweiShen]

/codex --create-issues Create issues accordingly. --full-history

[github-actions]

Created new feature issue #616 for "Split runAction into explicit initialize/execute/finalize phases"

[github-actions]

Created new feature issue #617 for "Centralize GitHub event shape branching into shared typed helpers"

[github-actions]

Created new feature issue #618 for "Unify result post-processing pipeline in result-handler"