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fix(cli): ensure skills list outputs to stdout in non-interactive environments#24566

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scidomino merged 4 commits intomainfrom
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Apr 7, 2026
Merged

fix(cli): ensure skills list outputs to stdout in non-interactive environments#24566
scidomino merged 4 commits intomainfrom
tty-check

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@spencer426
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@spencer426 spencer426 commented Apr 2, 2026

Summary

Fixes a regression where gemini skills list produced no output on stdout when run in non-interactive environments (e.g., via a Python script's subprocess.run). This regression was caused by PR #22739, which configured the ConsolePatcher to drop console.log and console.info messages in headless mode to reduce noise. Because skills list relied on debugLogger.log (which wraps console.log), its intended stdout payload was incorrectly suppressed.

This PR modifies the skills list command to write its output directly using process.stdout.write, bypassing the ConsolePatcher and ensuring the list is reliably printed regardless of the TTY state.

Details

  • Replaced debugLogger.log calls with process.stdout.write in packages/cli/src/commands/skills/list.ts.
  • Formatted newlines explicitly to match the previous output.
  • Removed the unused debugLogger import.
  • Updated unit tests (list.test.ts) to spy on process.stdout.write instead of coreEvents.emitConsoleLog.

Related Issues

Caused by #22739
Fixes #24574

How to Validate

  1. Run gemini skills list in a standard terminal. It should print the discovered skills as expected.
  2. Run gemini skills list in a non-interactive environment (e.g., piping to cat or using a Python script):
    python3 -c "import subprocess; print(subprocess.run(['node', 'packages/cli/bin/gemini', 'skills', 'list'], capture_output=True, text=True).stdout)"
    It should successfully print the list of skills instead of an empty string.

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

@spencer426 spencer426 requested a review from a team as a code owner April 2, 2026 21:11
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Summary of Changes

Hello, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a regression where the gemini skills list command failed to produce output when executed in non-interactive environments. By bypassing the ConsolePatcher and writing directly to standard output, the command now reliably displays information regardless of the TTY state, ensuring compatibility with automated scripts and pipelines.

Highlights

  • Direct stdout output: Modified the skills list command to write directly to process.stdout instead of using debugLogger, ensuring output is captured in non-interactive environments.
  • Regression fix: Resolved an issue where output was suppressed in headless mode due to changes in ConsolePatcher introduced in a previous PR.
  • Test suite update: Updated unit tests to spy on process.stdout.write to verify output correctly, replacing the previous reliance on coreEvents.emitConsoleLog.
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gemini-cli bot commented Apr 2, 2026

Hi @spencer426, thank you so much for your contribution to Gemini CLI! We really appreciate the time and effort you've put into this.

We're making some updates to our contribution process to improve how we track and review changes. Please take a moment to review our recent discussion post: Improving Our Contribution Process & Introducing New Guidelines.

Key Update: Starting January 26, 2026, the Gemini CLI project will require all pull requests to be associated with an existing issue. Any pull requests not linked to an issue by that date will be automatically closed.

Thank you for your understanding and for being a part of our community!

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github-actions bot commented Apr 2, 2026

Size Change: 0 B

Total Size: 34 MB

Filename Size Change
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ℹ️ View Unchanged
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Code Review

This pull request replaces the use of debugLogger from @google/gemini-cli-core with direct process.stdout.write calls in the skills list command. The corresponding tests have been updated to spy on process.stdout.write instead of monitoring core events. Feedback was provided to improve type safety in the test file by using vi.SpyInstance for the spy variable instead of the any type, which also allows for the removal of an ESLint suppression comment.

@gemini-cli gemini-cli bot added area/non-interactive Issues related to GitHub Actions, SDK, 3P Integrations, Shell Scripting, Command line automation 🔒 maintainer only ⛔ Do not contribute. Internal roadmap item. labels Apr 2, 2026
beckysiegel pushed a commit to chromium/chromium that referenced this pull request Apr 2, 2026
Gemini cli treats commands running from a subprocess as headless and skips info logging unless in debug mode.
See github.com/google-gemini/gemini-cli/pull/24566.

Bug: b:498783782
Change-Id: Ied8c7bfadd9765206bccba0af197b514c12d71b9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7727693
Reviewed-by: Brian Sheedy <bsheedy@chromium.org>
Reviewed-by: Erik Staab <estaab@chromium.org>
Auto-Submit: Jyothi Mathew <jyomathew@google.com>
Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1609566}
@scidomino scidomino added this pull request to the merge queue Apr 6, 2026
@github-merge-queue github-merge-queue bot removed this pull request from the merge queue due to failed status checks Apr 6, 2026
@spencer426 spencer426 added this pull request to the merge queue Apr 7, 2026
@github-merge-queue github-merge-queue bot removed this pull request from the merge queue due to failed status checks Apr 7, 2026
@scidomino scidomino added this pull request to the merge queue Apr 7, 2026
Merged via the queue into main with commit 0a8da98 Apr 7, 2026
27 checks passed
@scidomino scidomino deleted the tty-check branch April 7, 2026 03:42
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Cannot read the output of gemini skills list from a python script

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