---
phase: 43-documents-branding
plan: 01
subsystem: api
tags: [playwright, pdf, pdf-renderer, archiver, puter-inference, typescript]

# Dependency graph
requires:
  - phase: 41-diagrams-icons-theme-engine
    provides: diagram-renderer.ts with resolveBrowserPath and Playwright launch pattern
  - phase: 42-wallpapers-social-format-conversion-voice
    provides: content-job-runner.ts switch pattern and wallpaper-renderer.ts stripMarkdownFences pattern

provides:
  - pdf-renderer.ts — renderPdfDocument function using Playwright HTML-to-PDF for 4 docTypes
  - PdfDocumentBundle and BrandKitBundle types exported from types.ts
  - archiver package installed for ZIP operations (used by Plans 02-03)
  - content-job-runner dispatches "pdf-document" jobType to renderPdfDocument

affects:
  - 43-02 (brand-kit renderer will use BrandKitBundle type and archiver)
  - 43-03 (document UI panel will use PdfDocumentBundle type)

# Tech tracking
tech-stack:
  added: [archiver, "@types/archiver"]
  patterns:
    - buildPdfSystemPrompt function with docType switch for LLM prompt variation
    - stripMarkdownFences local helper (same pattern as wallpaper-renderer — not imported, duplicated intentionally)
    - try/finally browser lifecycle for Playwright cleanup

key-files:
  created:
    - server/src/services/renderers/pdf-renderer.ts
    - server/src/__tests__/pdf-renderer.test.ts
  modified:
    - server/src/services/renderers/types.ts
    - server/src/services/content-job-runner.ts
    - server/package.json

key-decisions:
  - "stripMarkdownFences duplicated locally in pdf-renderer — wallpaper-renderer does not export it and creating a shared util was not planned"
  - "buildPdfSystemPrompt uses a switch with 4 distinct system prompt variants (report/invoice/api-docs/one-pager) — each has structurally different instructions for the LLM"
  - "archiver installed now so Plans 02-03 can use it without an extra install step"

patterns-established:
  - "PDF system prompts always include 'Use only inline CSS in a <style> block. No external URLs, no <link> tags, no <script> tags. Use web-safe system fonts' constraint"
  - "Playwright page.pdf() with format A4, printBackground true, 20mm margins — standard PDF output configuration"

requirements-completed: [DOC-01, DOC-02, DOC-03]

# Metrics
duration: 5min
completed: 2026-04-04
---

# Phase 43 Plan 01: PDF Renderer Foundation Summary

**Playwright HTML-to-PDF renderer for 4 document types (report/invoice/api-docs/one-pager) with PdfDocumentBundle/BrandKitBundle types and content-job-runner wiring**

## Performance

- **Duration:** ~5 min
- **Started:** 2026-04-04T22:43:00Z
- **Completed:** 2026-04-04T22:45:11Z
- **Tasks:** 2
- **Files modified:** 5

## Accomplishments

- Created pdf-renderer.ts with renderPdfDocument: LLM generates HTML via puterChatComplete, Playwright renders to PDF, returns PdfDocumentBundle JSON
- Added PdfDocumentBundle and BrandKitBundle interfaces to types.ts and updated ContentBundle union
- Installed archiver + @types/archiver for Plans 02-03 ZIP operations
- Wired "pdf-document" jobType in content-job-runner switch with dynamic import pattern
- 6 unit tests pass covering all 4 docTypes + browser cleanup + system prompt variation

## Task Commits

Each task was committed atomically:

1. **Task 1: Install archiver, add bundle types, create pdf-renderer with tests** - `7c7394bf` (feat)
2. **Task 2: Wire pdf-document jobType into content-job-runner** - `16023234` (feat)

## Files Created/Modified

- `server/src/services/renderers/pdf-renderer.ts` - renderPdfDocument (Playwright HTML-to-PDF) + buildPdfSystemPrompt
- `server/src/__tests__/pdf-renderer.test.ts` - 6 unit tests with playwright-core/puter-inference mocks
- `server/src/services/renderers/types.ts` - PdfDocumentBundle and BrandKitBundle interfaces added, ContentBundle union updated
- `server/src/services/content-job-runner.ts` - "pdf-document" case added to renderContent switch
- `server/package.json` - archiver + @types/archiver added

## Decisions Made

- stripMarkdownFences was duplicated locally in pdf-renderer.ts rather than importing from wallpaper-renderer.ts because wallpaper-renderer does not export this helper. This follows the existing project pattern where it was also not exported.
- buildPdfSystemPrompt generates structurally distinct prompts per docType — report gets formal section structure, invoice gets financial table layout, api-docs gets endpoint reference format, one-pager gets visual impact layout.

## Deviations from Plan

None - plan executed exactly as written.

## Issues Encountered

None.

## User Setup Required

None - no external service configuration required.

## Next Phase Readiness

- Plan 43-02 (brand-kit renderer) can now import BrandKitBundle from types.ts and use archiver for ZIP output
- Plan 43-03 (document UI panel) can import PdfDocumentBundle and use the pdf-document jobType
- All 6 tests pass, TypeScript clean for modified files

---
*Phase: 43-documents-branding*
*Completed: 2026-04-04*

## Self-Check: PASSED

- pdf-renderer.ts: FOUND
- pdf-renderer.test.ts: FOUND
- SUMMARY.md: FOUND
- Task 1 commit 7c7394bf: FOUND
- Task 2 commit 16023234: FOUND