chore(deps): update knip ✂️ and add enable treatTagHintsAsErrors

[cylewaitforit]

🔗 Linked issue

Closes: #2821

🧭 Context

Updates knip to 6.15.0 and enables treatTagHintsAsErrors. This will require that unused tags identified as unused by knip be removed.

📚 Description

This can be checked by adding an unused tag like those removed in #2786 and then running pnpm knip --production --exclude dependencies to see it exit with code 1.

[vercel]

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Project	Deployment	Actions	Updated (UTC)
docs.npmx.dev	Ready	Preview, Comment	May 31, 2026 3:48pm
npmx.dev	Ready	Preview, Comment	May 31, 2026 3:48pm

1 Skipped Deployment

Project	Deployment	Actions	Updated (UTC)
npmx-lunaria	Ignored		May 31, 2026 3:48pm

[coderabbitai]

📝 Walkthrough

Walkthrough

Knip is upgraded from v6.14.2 to v6.15.0, and the new treatTagHintsAsErrors: true configuration option is enabled in knip.ts to enforce stricter validation of unnecessary tag hints within the codebase.

Changes

Knip tag hint validation

Layer / File(s)	Summary
Enable stricter tag hint validation package.json, knip.ts	Knip dependency is bumped to v6.15.0 to support the new treatTagHintsAsErrors option, which is then enabled in the KnipConfig to prevent unnecessary tag hints from remaining in the codebase.

Possibly related PRs

• npmx-dev/npmx.dev#2786: Both PRs modify knip.ts configuration to enforce hints-as-errors strategies; this PR adds treatTagHintsAsErrors whilst the other adds treatConfigHintsAsErrors.

Suggested reviewers

• serhalp
• ghostdevv

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes both main changes: updating knip dependency and enabling treatTagHintsAsErrors configuration.
Linked Issues check	✅ Passed	The PR fully addresses issue #2821 by updating knip to 6.15.0 and enabling treatTagHintsAsErrors in the configuration.
Out of Scope Changes check	✅ Passed	All changes are directly related to the linked issue objectives: knip version bump and treatTagHintsAsErrors enablement, with no extraneous modifications.
Description check	✅ Passed	The pull request description clearly relates to the changeset, providing context about the knip upgrade and the enablement of treatTagHintsAsErrors.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	knip@​6.15.0

View full report

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

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[github-actions]

e18e dependency analysis

No dependency warnings found.