fix(core): display actual graph output in tracker_visualize tool

[anj-s]

Summary

Fixes the tracker_visualize tool so that the generated task dependency graph is returned for user display, instead of the hardcoded string "Graph rendered."

Details

Previously, the TrackerVisualizeInvocation returned the graph correctly to the LLM via llmContent, but masked the output in the UI using returnDisplay: 'Graph rendered.'. This changes the returnDisplay value to the actual output string so the user can see the graph structure in their terminal.

Related Issues

Fixes #21456

How to Validate

1. Start the CLI with a task tracker enabled.
2. Create a few tasks and dependencies.
3. Run the tracker_visualize tool or ask the agent to visualize the tracker.
4. Confirm that the terminal displays the rendered graph (tree structure) rather than just the text "Graph rendered."

Pre-Merge Checklist

• Updated relevant documentation and README (if needed)
• Added/updated tests (if needed) - Existing tests cover the output content.
• 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

[gemini-cli]

Hi @anj-s, 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!

[github-actions]

Size Change: -15 B (0%)

Total Size: 26 MB

ℹ️ View Unchanged

Filename	Size	Change
./bundle/gemini.js	25.5 MB	-15 B (0%)
./bundle/node_modules/@google/gemini-cli-devtools/dist/client/main.js	221 kB	0 B
./bundle/node_modules/@google/gemini-cli-devtools/dist/src/_client-assets.js	227 kB	0 B
./bundle/node_modules/@google/gemini-cli-devtools/dist/src/index.js	11.5 kB	0 B
./bundle/node_modules/@google/gemini-cli-devtools/dist/src/types.js	132 B	0 B
./bundle/sandbox-macos-permissive-open.sb	890 B	0 B
./bundle/sandbox-macos-permissive-proxied.sb	1.31 kB	0 B
./bundle/sandbox-macos-restrictive-open.sb	3.36 kB	0 B
./bundle/sandbox-macos-restrictive-proxied.sb	3.56 kB	0 B
./bundle/sandbox-macos-strict-open.sb	4.82 kB	0 B
./bundle/sandbox-macos-strict-proxied.sb	5.02 kB	0 B

_{compressed-size-action}

[gemini-cli]

Hi there! Thank you for your contribution to Gemini CLI.

To improve our contribution process and better track changes, we now require all pull requests to be associated with an existing issue, as announced in our recent discussion and as detailed in our CONTRIBUTING.md.

This pull request is being closed because it is not currently linked to an issue. Once you have updated the description of this PR to link an issue (e.g., by adding Fixes #123 or Related to #123), it will be automatically reopened.

How to link an issue:
Add a keyword followed by the issue number (e.g., Fixes #123) in the description of your pull request. For more details on supported keywords and how linking works, please refer to the GitHub Documentation on linking pull requests to issues.

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

[gemini-cli]

Thank you for linking an issue! This pull request has been automatically reopened.

[gemini-code-assist]

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 improves the usability of the tracker_visualize tool by ensuring that the generated task dependency graph is directly presented to the user. This change allows users to immediately see the visual representation of their task dependencies, enhancing the tool's utility and providing clearer feedback.

Highlights

• Tool Output Display: The tracker_visualize tool now correctly displays the actual task dependency graph output to the user in the terminal, replacing the previous hardcoded "Graph rendered." message.

Changelog

• packages/core/src/tools/trackerTools.ts
  • Modified the TrackerVisualizeInvocation class to return the actual graph output for display.

Activity

• No specific activity (comments, reviews, progress) has been recorded for this pull request yet.

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[gemini-code-assist]

Code Review

Upon review against repository-specific rules, the identified Cross-Site Scripting (XSS) vulnerability in the returnDisplay field is not considered relevant for CLI tool output displayed in a user's terminal, as per Rule 2. This rule states that XSS is not a relevant vulnerability for plain text output in a CLI tool's terminal, as it lacks a browser context for script execution. Therefore, no security comments are retained from the original review.