fix: bash tool memory leak

[Jiwenshang]

Issue for this PR

Closes #21319

Type of change

• Bug fix

What does this PR do?

fix bash tool memory leak

How did you verify your code works?

UT & test manually

Screenshots / recordings

If this is a UI change, please include a screenshot or recording.

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR

If you do not follow this template your PR will be automatically rejected.

[github-actions]

Hey! Your PR title fix bash memory leak doesn't follow conventional commit format.

Please update it to start with one of:

• feat: or feat(scope): new feature
• fix: or fix(scope): bug fix
• docs: or docs(scope): documentation changes
• chore: or chore(scope): maintenance tasks
• refactor: or refactor(scope): code refactoring
• test: or test(scope): adding or updating tests

Where scope is the package name (e.g., app, desktop, opencode).

See CONTRIBUTING.md for details.

[github-actions]

The following comment was made by an LLM, it may be inaccurate:

Based on my search, here are the potentially related PRs:

Most Relevant:

• feat(bash): stream large output to tmpfile with filtering and GC #8953 - feat(bash): stream large output to tmpfile with filtering and GC - Previous bash memory leak fix with similar scope
• fix: resolve memory leak issues across multiple subsystems #14650 - fix: resolve memory leak issues across multiple subsystems - General memory leak fixes
• fix: consolidate memory leak fixes from #14650 and #8953 #15435 - fix: consolidate memory leak fixes from fix: resolve memory leak issues across multiple subsystems #14650 and feat(bash): stream large output to tmpfile with filtering and GC #8953 - Consolidates prior bash memory fixes

Other related memory leak fixes:

• fix: clear tool output and attachments when pruning to prevent memory leak #7049 - clear tool output and attachments when pruning to prevent memory leak
• fix(opencode): memory leaks in session handling #10392 - memory leaks in session handling
• fix: address 6 memory leaks for long-running sessions #13594 - address 6 memory leaks for long-running sessions
• fix(opencode): robust process exit detection for child processes #15757 - robust process exit detection for child processes
• fix: resolve multiple memory leaks causing unbounded growth #16695 - resolve multiple memory leaks causing unbounded growth
• fix(opencode): reduce memory usage and database bloat in long-running instances #16730 - reduce memory usage and database bloat in long-running instances

Note: PR #21192 (mentioned in "Closes #21192") appears to be a TUI fix unrelated to bash memory leaks.

[github-actions]

Thanks for updating your PR! It now meets our contributing guidelines. 👍

[github-actions]

Thanks for your contribution!

This PR doesn't have a linked issue. All PRs must reference an existing issue.

Please:

1. Open an issue describing the bug/feature (if one doesn't exist)
2. Add Fixes #<number> or Closes #<number> to this PR description

See CONTRIBUTING.md for details.

[rekram1-node]

Automated PR Cleanup

Thank you for contributing to opencode.

Due to the high volume of PRs from users and AI agents, we periodically close older PRs using automated criteria so maintainers can focus review time on the most active and community-supported contributions.

This PR was closed because it matched the following cleanup criteria:

• The PR was created more than 1 month ago
• The PR had fewer than 2 positive reactions
• Positive reactions are counted as thumbs-up, heart, celebration, or rocket reactions on the PR

PRs created within the last month are not affected by this cleanup.

If you believe this PR was closed incorrectly, or if you are still actively working on it, please leave a comment explaining why it should be reopened. A maintainer can review and reopen it if appropriate.

Thanks again for taking the time to contribute.