Update bonsplit for tab title font size clamp

[austinywang]

Summary

• update vendor/bonsplit to clamp tab title font size to a minimum readable value
• keep drag previews aligned with the live tab font sizing
• add bonsplit unit coverage for the clamping helper

Dependency

• fix: clamp tab title font size bonsplit#94

Testing

• ./scripts/reload.sh --tag fix-bonsplit-title-font-clamp

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Note

Low Risk
The provided diff contains no file changes, so it should not affect runtime behavior. Risk is low unless the diff was truncated or vendor updates were omitted from the snapshot.

Overview
No code changes are visible in the supplied diff (it only shows +++ /dev/null). If this PR is intended to update vendor/bonsplit for tab title font-size clamping, the actual vendor/test changes are not included here and should be rechecked before review/merge.

^{Reviewed by Cursor Bugbot for commit 16e4e4e. Bugbot is set up for automated code reviews on this repo. Configure here.}

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Summary by cubic

Updates vendored bonsplit to clamp tab title font size to a minimum readable value and keep drag previews aligned with live tab sizing. Improves tab readability and consistency in dense layouts.

• Dependencies
  • Pulls in manafow-ai/bonsplit#94.

^{Written for commit 16e4e4e. Summary will update on new commits.}

Summary by CodeRabbit

• Chores
  • Updated internal dependencies.

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Project	Deployment	Actions	Updated (UTC)
cmux	Ready	Preview, Comment	Apr 13, 2026 2:04am

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 7e8f509f-670d-4d33-8efd-d574c79b7003

📥 Commits

Reviewing files that changed from the base of the PR and between 165cf6e and 16e4e4e.

📒 Files selected for processing (1)

• vendor/bonsplit

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📝 Walkthrough

Walkthrough

Updated the vendor/bonsplit submodule reference from commit 2979ef647d4a6ab0bf7f93ce82c59cbf0c70e1e1 to commit 5d6b10bedefbe2b997ab04dffb27efefe4e53836, upgrading the bundled dependency to a newer revision.

Changes

Cohort / File(s)	Summary
Submodule Reference vendor/bonsplit	Updated submodule commit pointer to a newer revision.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Possibly related PRs

• Fix browser pane flicker during multi-split resize #2574: Also updates the vendor/bonsplit submodule pointer to a newer commit reference.

Poem

🐰 A hop, a skip, a fresh commit,
The bonsplit grows, bit by bit,
Dependencies dance, all trimmed just right,
This little update shines so bright! ✨

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly describes the main change: updating bonsplit to implement tab title font size clamping, which aligns with the submodule update from the old commit to the new one.
Description check	✅ Passed	The description includes a summary of changes and testing instructions, but is missing key template sections like demo video and the review trigger checklist items.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix-bonsplit-title-font-clamp

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[greptile-apps]

Greptile Summary

This PR bumps the vendor/bonsplit submodule pointer from 2979ef6 to 5d6b10b to pick up a font-size clamp for tab titles and aligned drag-preview sizing (bonsplit#94). No Swift or configuration changes are needed in cmux because Workspace.swift already passes config.surfaceTabBarFontSize directly to bonsplit's tabTitleFontSize, and clamping is now owned by bonsplit internally.

Confidence Score: 5/5

Safe to merge once bonsplit#94 is confirmed merged into bonsplit's main branch.

Pure submodule pointer bump with no cmux Swift or config changes. The font-size value flows correctly from GhosttyConfig through Workspace.swift into bonsplit unchanged; clamping is now owned by bonsplit internally. The only finding is a P2 reminder to verify the submodule commit is on origin/main per the project's submodule safety policy.

No files require special attention beyond confirming the bonsplit submodule commit is on its remote main branch.

Important Files Changed

Filename	Overview
vendor/bonsplit	Submodule pointer bumped from 2979ef6 to 5d6b10b to pull in tab title font-size clamping and aligned drag-preview sizing from bonsplit#94; no cmux-side code changes required.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A["User config\nsurface-tab-bar-font-size"] --> B["GhosttyConfig.swift\nsurfaceTabBarFontSize: CGFloat"]
    B --> C["Workspace.swift\nbonsplitAppearance(tabTitleFontSize:)"]
    C --> D["BonsplitConfiguration.Appearance\n.tabTitleFontSize"]
    D --> E["bonsplit (vendor/bonsplit)\nclamp to min readable value ✅ NEW"]
    E --> F["Rendered tab title\n+ drag preview (aligned ✅ NEW)"]

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_{Reviews (1): Last reviewed commit: "Update bonsplit for tab title font size ..." | Re-trigger Greptile}

[greptile-apps]

Verify submodule commit is on bonsplit origin/main

Per the CLAUDE.md submodule safety policy, the new pointer 5d6b10b must be reachable from the bonsplit remote's main branch before this parent-repo commit is merged, otherwise the commit could be orphaned if the feature branch is rebased or deleted. Please confirm bonsplit#94 has been merged into main and run the check:

cd vendor/bonsplit && git merge-base --is-ancestor HEAD origin/main

A zero exit code means the commit is safely on main.

Context Used: CLAUDE.md (source)

[cubic-dev-ai]

No issues found across 1 file