ci: skip typecheck for refs and non-code file PRs

[nicktrn]

Follow-up to #3615. The code filter currently fires typecheck for any change outside docs/, .changeset/, hosting/, or .github/ - so a docs-only PR like #3623 (touching references/ai-chat/.env.example + README.md) triggered the typecheck job. None of the references/* packages declare a typecheck script either, so even when a real code change lands there, turbo run typecheck skips them. Running the job is pure cost.

Tightens the filter to also exclude:

• references/** - playground projects, none of them contribute to turbo run typecheck today
• **/*.md - markdown anywhere
• **/.env.example - example env files anywhere

Two known gaps left open:

• references/ have no real CI typecheck coverage. Separate question - either add typecheck scripts to each (or top-level tsc -p), or accept playground status.
• changes job still runs (it's a path-filter step) but the dependent jobs all skip on irrelevant PRs.

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Latest commit: 6edc55b

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: 97e2af35-3f00-4620-9cc2-0c82386d8063

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• .github/workflows/pr_checks.yml

📜 Recent review details

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• GitHub Check: webapp / 🧪 Unit Tests: Webapp (7, 8)
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🔇 Additional comments (1)

.github/workflows/pr_checks.yml (1)

37-39: LGTM!

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Walkthrough

This PR updates the GitHub Actions workflow configuration for PR checks by adding three path exclusion filters to the dorny/paths-filter action: references/**, **/*.md, and **/.env.example. These exclusions prevent changes to documentation files, reference materials, and example environment configuration files from triggering the downstream PR check jobs.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Description check	❓ Inconclusive	The description is comprehensive and complete, covering context, changes made, and known gaps. However, it does not follow the repository's template structure with required sections.	Consider structuring the description to match the template with Testing, Changelog, and Screenshots sections, though the core content is thorough.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: tightening CI filters to skip typecheck for references and non-code files.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch ci/pr-checks-skip-references

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

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