---
phase: 44-video-presentations
plan: 02
subsystem: content-renderer
tags: [remotion, video, presentations, typescript, llm, sse, puter-inference]

# Dependency graph
requires:
  - phase: 44-video-presentations/44-01
    provides: packages/content-renderer workspace package, getBundlePath, renderPresentationComposition, PresentationBundle type, presentation case in content-job-runner stub
  - phase: 40-job-infrastructure
    provides: content_jobs table, SSE live events, publishLiveEvent
provides:
  - renderPresentation function — LLM slide JSON generation + Remotion MP4 render + SSE progress events
  - server/src/types/content-renderer.d.ts — ambient module declaration isolating Remotion JSX from server tsc
affects:
  - 44-video-presentations/44-03 (UI PresentationPanel consumes PresentationBundle returned by this renderer)

# Tech tracking
tech-stack:
  added: []
  patterns:
    - Ambient module declaration (content-renderer.d.ts) isolates Remotion/React JSX from server tsc context — force-added with git add -f following express.d.ts precedent
    - Dynamic import pattern: await import("@paperclipai/content-renderer") at runtime keeps webpack/rspack out of server tsc compilation
    - stripMarkdownFences local helper (same pattern as pdf-renderer and brand-renderer) cleans LLM output before JSON.parse
    - try/catch around resolveBrowserPath — falls back to undefined so Remotion auto-downloads Chromium if needed

key-files:
  created:
    - server/src/services/renderers/presentation-renderer.ts
    - server/src/types/content-renderer.d.ts
  modified: []

key-decisions:
  - "Ambient module declaration in server/src/types/content-renderer.d.ts provides type safety for dynamic import without pulling JSX composition files into server tsc context"
  - "content-renderer NOT added as workspace dep in server/package.json — symlink in node_modules causes tsc to walk JSX source files even with dynamic import; ambient declaration is sufficient"
  - "resolveBrowserPath wrapped in try/catch — falls back to undefined so Remotion auto-downloads Chromium if Playwright binary not found"
  - "videoType 'demo-video' or 'demo' both map to DemoVideo composition — content-renderer uses 'demo' internally, renderer accepts both"

patterns-established:
  - "Ambient module declaration pattern: server/src/types/*.d.ts for packages whose source includes JSX/webpack contexts (force-add to bypass gitignore)"

requirements-completed: [PRES-01, PRES-02, PRES-03, PRES-04]

# Metrics
duration: 12min
completed: 2026-04-04
---

# Phase 44 Plan 02: Video Presentations — Presentation Renderer Summary

**renderPresentation function with LLM pitch-deck/demo-video slide generation (puterChatComplete), Remotion MP4 rendering (concurrency:1 via content-renderer), and SSE content_job.progress events**

## Performance

- **Duration:** ~12 min
- **Started:** 2026-04-04T23:26:00Z
- **Completed:** 2026-04-04T23:38:00Z
- **Tasks:** 2
- **Files modified:** 2

## Accomplishments

- Created `server/src/services/renderers/presentation-renderer.ts` — replaces stub from plan 01 with full implementation: LLM generates 6-10 pitch-deck slides or 4-8 demo-video slides as structured JSON, Remotion renders to MP4 Buffer via dynamic import of content-renderer, SSE progress events published via publishLiveEvent
- Created `server/src/types/content-renderer.d.ts` — ambient module declaration providing type safety for the dynamic import without pulling React/JSX composition files into server tsc context (no jsx option in server tsconfig)
- Both server and shared packages compile without TypeScript errors

## Task Commits

1. **Task 1: Create presentation-renderer with LLM slide generation and Remotion render pipeline** - `161ff9cf` (feat)
2. **Task 2: Verify server tsc compilation with presentation renderer wired** - `28a8d63d` (feat)

## Files Created/Modified

- `server/src/services/renderers/presentation-renderer.ts` — Full renderPresentation implementation: LLM slide JSON → Remotion MP4 → PresentationBundle JSON
- `server/src/types/content-renderer.d.ts` — Ambient declaration for @paperclipai/content-renderer (force-added, bypasses gitignore)

## Decisions Made

- Ambient module declaration instead of workspace dep: adding `@paperclipai/content-renderer` as a workspace dep caused TypeScript to resolve the package source (package.json exports `./src/index.ts`) and walk into JSX files, triggering `--jsx is not set` errors. The ambient declaration in `server/src/types/` provides correct types without the source resolution.
- `resolveBrowserPath` wrapped in try/catch — if Playwright Chromium is not installed, `browserExecutable` is `undefined` and Remotion will auto-download Chromium (acceptable fallback for first-time setup).
- Both `"demo-video"` and `"demo"` input values for `videoType` map to the DemoVideo composition — content-renderer internally uses `videoType === "demo"` to select the composition.

## Deviations from Plan

### Auto-fixed Issues

**1. [Rule 3 - Blocking] Ambient module declaration to resolve tsc JSX incompatibility**
- **Found during:** Task 2 (TypeScript compilation verification)
- **Issue:** Adding `@paperclipai/content-renderer` as workspace dependency caused tsc to resolve the package's source files (package.json maps exports to `./src/index.ts`), which includes React JSX compositions. Server tsconfig has no `jsx` option, resulting in `TS6142: Module './PitchDeck' was resolved to PitchDeck.tsx but --jsx is not set` errors. This blocked successful compilation.
- **Fix:** Removed `@paperclipai/content-renderer` from server/package.json and created `server/src/types/content-renderer.d.ts` as an ambient module declaration. This provides type safety for the dynamic import without TypeScript resolving the JSX source files. Force-added with `git add -f` (file would otherwise be excluded by `server/src/**/*.d.ts` gitignore pattern — same approach used for `express.d.ts`).
- **Files modified:** `server/src/types/content-renderer.d.ts` (created), `server/package.json` (reverted content-renderer dep)
- **Verification:** `pnpm --filter @paperclipai/server exec -- npx tsc --noEmit` exits 0
- **Committed in:** `28a8d63d` (Task 2 commit)

---

**Total deviations:** 1 auto-fixed (1 blocking — tsc JSX incompatibility)
**Impact on plan:** Required for correct TypeScript compilation. The ambient declaration pattern is the correct architectural solution for Remotion isolation. No scope creep.

## Issues Encountered

- Parallel agent had already executed plan 44-03 by the time Task 2 was being completed. The `content-renderer.d.ts` ambient declaration was committed as a new file — it did not conflict with plan 44-03 work (which touched UI files only).

## Known Stubs

None — `renderPresentation` is fully implemented; no stubs remain.

## Next Phase Readiness

- `renderPresentation` is fully wired: LLM → slides JSON → Remotion → MP4 → PresentationBundle
- Plan 44-03 (UI) already executed in parallel — PresentationPanel consumes PresentationBundle via the content-job SSE pattern
- TypeScript compilation passes for server and shared packages

---
*Phase: 44-video-presentations*
*Completed: 2026-04-04*