v1 tag recently crashing

Log in CI mentions new issue with bun:

```
Set session_id: 4d3cefb1-c3f1-4209-a768-d7c7e4dfa353
Internal error: directory mismatch for directory "/home/runner/work/_actions/anthropics/claude-code-action/v1/tsconfig.json", fd 4. You don't need to do anything, but this indicates a bug.
Run BUN_BIN="${GITHUB_ACTION_PATH}/bin/bun"
Internal error: directory mismatch for directory "/home/runner/work/_actions/anthropics/claude-code-action/v1/tsconfig.json", fd 4. You don't need to do anything, but this indicates a bug.
No buffered inline comments
```

did not happen before. has the tag recently moved?

Start with the CI log in this issue and inspect the repository's v1 tag history, especially the bundled Bun invocation and the referenced tsconfig.json path. Compare the tag with the previously working version to determine what moved and reproduce the directory-mismatch error in CI. Done means the v1 action no longer crashes and the affected CI run completes normally.

Written by the indexing model from the issue text.