fix: fallback to site description for pages without description

[rsbh]

Summary

• Pages without description in frontmatter now fallback to config.site.description
• Applies to <meta name="description">, og:description, and twitter:description
• One-line change in Head component

Test plan

• All 180 tests pass
• Pages without frontmatter description get site-level description in meta tags

🤖 Generated with Claude Code

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Project	Deployment	Actions	Updated (UTC)
chronicle	Ready	Preview, Comment	Jun 4, 2026 8:15am

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

Run ID: 1fff9025-a6cd-428f-91bd-4958306647aa

📥 Commits

Reviewing files that changed from the base of the PR and between b1f6a10 and eed6dc6.

📒 Files selected for processing (1)

• packages/chronicle/src/lib/head.tsx

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📝 Walkthrough

Summary by CodeRabbit

• Bug Fixes
  • Pages without an explicit description now automatically display the site's default description, preventing missing description metadata.

Walkthrough

In Head, the description prop is now destructured as pageDescription with a fallback to config.site.description for the actual meta/OG/Twitter description fields when no page-specific description is provided.

Changes

Description Fallback Mechanism

Layer / File(s)	Summary
Head component description fallback packages/chronicle/src/lib/head.tsx	Head component destructures the incoming description prop as pageDescription and derives a local description value using a fallback to config.site.description, which is then used for meta/OG/Twitter tags.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately describes the main change: implementing a fallback to site description for pages missing individual descriptions.
Description check	✅ Passed	The description is clearly related to the changeset, explaining the fallback behavior for descriptions and referencing the affected meta tags and component.
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 docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/meta-description-fallback

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[mahakmakharia]

LGTM