Summary

This PR fixes the Argument list too long error in both the Gemini Scheduled Issue Triage and Gemini Automated Issue Triage workflows by avoiding passing massive JSON arrays and text (containing full issue bodies) into bash environment variables. It also resolves a trusted workspace error when running the CLI via run-gemini-cli in a headless environment.

Details

For gemini-scheduled-issue-triage.yml:

1. Refactored the Find untriaged issues and Get issue from event steps to output the JSON objects directly into files (no_area_issues.json, no_kind_issues.json, etc.) instead of saving them into bash variables.
2. Used jq to merge and deduplicate the multiple JSON outputs into a single issues_to_triage.json file.
3. Added the read_file tool to the allowed coreTools array in the Run Gemini Issue Analysis step, and updated the prompt to instruct Gemini to read the issues_to_triage.json file directly from the filesystem.

For gemini-automated-issue-triage.yml:

1. Created a new Prepare Issue Data step to write the ISSUE_TITLE and ISSUE_BODY to an issue_context.md file rather than passing them to the AI action as environment variables.
2. Added the read_file tool to the coreTools array and updated the prompt to instruct the AI to read the issue_context.md file.

For both workflows:

• Exported GEMINI_CLI_TRUST_WORKSPACE: 'true' to explicitly authorize the CLI to run securely inside the GitHub Actions environment.

Related Issues

Closes #26602

How to Validate

1. Go to the "Actions" tab on GitHub.
2. Select the 📋 Gemini Scheduled Issue Triage or 🏷️ Gemini Automated Issue Triage workflow.
3. Click "Run workflow" and select this PR branch (fix-triage-workflow).
4. Ensure the job completes successfully and applies labels to the untriaged issues found without hitting size or trust errors.

Successful Verification Runs:

• Scheduled Triage Verification Run
• Automated Triage Verification Run

Pre-Merge Checklist

• Updated relevant documentation and README (if needed)
• Added/updated tests (if needed)
• Noted breaking changes (if any)
• Validated on required platforms/methods:
  • MacOS
    • npm run
    • npx
    • Docker
    • Podman
    • Seatbelt
  • Windows
    • npm run
    • npx
    • Docker
  • Linux
    • npm run
    • npx
    • Docker