- New src/utils/pdf-handler.ts with handlePdfRoute() helper
- Handles: content-type validation, PDF option validation, slot acquire/release, error mapping, response headers
- Refactored convert.ts from 388 to 233 lines (40% reduction)
- 10 TDD tests for the new helper (RED→GREEN verified)
- All 618 tests passing, zero tsc --noEmit errors
- Replace all catch(err: any) with catch(err: unknown) across 8 source files
- Add errorMessage() and errorCode() helpers for safe error property access
- Type nodemailer transport config as SMTPTransport.Options (was any)
- Type health endpoint databaseStatus (was any)
- Type convert route margin param (was any)
- Change queryWithRetry params from any[] to unknown[]
- Update isTransientError to require Error instances (was accepting plain objects)
- 19 new TDD tests (error-type-safety.test.ts)
- Updated existing tests to use proper Error instances
- 598 tests total, all passing, zero type errors
- CORS middleware now allows both docfast.dev and staging.docfast.dev origins
for auth/billing routes, with Vary: Origin header for proper caching
- Unknown origins fall back to production origin (not reflected)
- 13 TDD tests added for CORS behavior
Type safety improvements:
- Augment Express.Request with requestId, acquirePdfSlot, releasePdfSlot
- Use Puppeteer's PaperFormat and PuppeteerLifeCycleEvent types in browser.ts
- Use 'as const' for format literals in convert/demo/templates routes
- Replace Stripe apiVersion 'as any' with @ts-expect-error
- Zero 'as any' casts remaining in production code
579 tests passing (13 new), 51 test files
- renderPdf() and renderUrlPdf() now return { pdf, durationMs }
- Timing wraps the actual render with Date.now()
- Log render duration via logger.info
- Add X-Render-Time response header in convert and demo routes
- Update all callers in convert, demo, templates routes
- Add TDD tests in render-timing.test.ts
- Update existing test mocks for new return shape
- Add scale, pageRanges, preferCSSPageSize, width, height to PdfOptions
- Add headerTemplate, footerTemplate, displayHeaderFooter to docs
- Pass all options through routes to browser service for HTML, Markdown, and URL endpoints
- Export PdfRenderOptions interface for type reuse
- Bump version to 0.4.5
- Add swagger-jsdoc dependency for auto-generating OpenAPI spec from JSDoc
- Add JSDoc @openapi annotations to all route handlers
- Create scripts/generate-openapi.mjs build step
- OpenAPI spec now auto-generated from code — no manual JSON editing
- All 13 endpoints documented with full parameters
- New demo endpoints documented, signup marked as deprecated
- Updated info description: demo-first, no free tier references
- Dockerfile updated to run openapi generation during build
- Build script updated: npm run build generates spec before compile
- Add fe80::/10 (IPv6 link-local) detection to isPrivateIP()
- Update error message to match specification: 'URL resolves to a private/internal IP address'
- Existing protections already covered all required IPv4 ranges and IPv6 localhost
- Launch BROWSER_COUNT separate Chromium instances (default: 2)
- Each with PAGES_PER_BROWSER pages (default: 8, 16 total)
- Round-robin distribution across browser instances
- Independent restart scheduling per browser
- Updated health endpoint to show per-browser stats
- docker-compose: added BROWSER_COUNT and PAGES_PER_BROWSER env vars
