Failed to spawn Bun process: E2BIG argument list too long in Claude PR Assistant workflow

[thecodacus]

Describe the bug
The Claude PR Assistant workflow fails with the error: Error: Failed to spawn Claude Code process: E2BIG: argument list too long, posix_spawn 'bun'. This appears when running Bun with a large argument list, causing the job to fail.

To Reproduce
Steps to reproduce the behavior:

1. Trigger the Claude PR Assistant workflow on a pull request with large file changes or prompts.
2. Wait for the Claude-related job to start.
3. Observe the log output during the Bun process execution.
4. See error: E2BIG: argument list too long, posix_spawn 'bun'

Expected behavior
The workflow should complete successfully without hitting argument list limitations when invoking Bun. Large inputs or file lists should be handled gracefully by writing to temporary files or batching.

Screenshots
If applicable, you may want to include a screenshot of the error log:

Error: Failed to spawn Claude Code process: E2BIG: argument list too long, posix_spawn 'bun'

Additional context

• The error was observed in the .github/workflows/claude.yml workflow. (written based on official docs)
• Possibly triggered by a large prompt or file list being passed as arguments to Bun.
• Related log output:

Error during Claude execution: Failed to spawn Claude Code process: E2BIG: argument list too long, posix_spawn 'bun'

• Suggest investigating if arguments can be passed via a temp file or reduced in size.

[georglauterbach]

Just hit this too. Very annoying.