chore(git): internalize tree ref resolver

[benvinegar]

Summary

• remove the unused public export from the tree-ref helper
• retain the helper for internal diff endpoint resolution
• add an empty maintenance changeset

Stack

• stacked above fix(ui): save note drafts without stale input races #1050 so required PTY checks include the note-race fix currently missing from main
• this PR diff contains only the Git export cleanup

Validation

• bun run format:check
• bun run lint
• bun run typecheck
• bun run deps:check
• bun run knip
• bun test packages/hunk-git/src/commands.test.ts
• bun run test

[vercel]

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1 Skipped Deployment

Project	Deployment	Actions	Updated
hunk-web	Ignored	Preview	Sep 8, 2026 4:32am UTC

[greptile-apps]

Greptile Summary

This PR internalizes the tree-ref resolver without changing its use by the diff endpoint.

• Removes the unused module-level export from resolveGitTreeRefAsync.
• Retains the helper and its existing internal call path.
• Adds an empty maintenance changeset.

Confidence Score: 5/5

The PR appears safe to merge because the removed export was not part of the package entrypoint and has no external repository callers.

The change only narrows an unused module-level export; the resolver remains available to its existing internal caller, and no actionable failures remain.

Important Files Changed

Filename	Overview
packages/hunk-git/src/commands.ts	Makes the tree-ref resolver module-private while preserving its implementation and internal usage.
.changeset/clean-git-tree-export.md	Adds an intentionally empty changeset for the internal maintenance update.

_{Reviews (1): Last reviewed commit: "chore(git): internalize tree ref resolve..." | Re-trigger Greptile}