---
id: M005
title: "Pipeline Dashboard, Technique Page Redesign, Key Moment Cards"
status: complete
completed_at: 2026-03-30T09:01:19.862Z
key_decisions:
  - D019: CSS grid 2-column layout with 22rem sticky sidebar and 768px responsive breakpoint for technique pages. Page max-width widened from 48rem to 64rem.
  - Fixed _emit_event to use _get_sync_session() with explicit try/finally instead of nonexistent _get_session_factory()
  - Changed key moment title element from span to h3 for semantic correctness within the Key Moments h2 section
  - Worker status auto-refreshes every 15s via setInterval for live monitoring
key_files:
  - backend/pipeline/stages.py
  - backend/routers/pipeline.py
  - backend/models.py
  - backend/schemas.py
  - alembic/versions/004_pipeline_events.py
  - frontend/src/pages/AdminPipeline.tsx
  - frontend/src/pages/TechniquePage.tsx
  - frontend/src/App.css
  - frontend/src/App.tsx
  - frontend/src/api/public-client.ts
lessons_learned:
  - Pipeline event instrumentation that already existed but had syntax errors — always verify existing code compiles before assuming a prior pass completed successfully.
  - Responsive breakpoint choice (768px vs 1024px) should match existing codebase conventions rather than arbitrary thresholds — consistency reduces maintenance burden.
  - Sticky sidebar in a grid layout needs explicit top offset and only works with position:sticky when the parent has defined height constraints from the grid.
---

# M005: Pipeline Dashboard, Technique Page Redesign, Key Moment Cards

**Added a pipeline admin dashboard with event logs and worker monitoring, restructured technique pages into a 2-column layout, and redesigned key moment cards for clearer visual hierarchy.**

## What Happened

M005 delivered three frontend-focused improvements across three slices.

**S01 — Pipeline Admin Dashboard (high risk):** Built /admin/pipeline with a video list table showing processing status, event counts, and token usage. Five new API endpoints provide video listing, pipeline retrigger, task revocation, paginated event logs, and Celery worker status. The PipelineEvent model and migration 004 already existed from a prior pass but had critical syntax errors (missing triple-quote docstrings, reference to nonexistent `_get_session_factory()`). Fixed all issues and verified 24 real events persisted from prior runs. Frontend includes a JsonViewer component for collapsible JSON payload inspection and worker status auto-refresh every 15 seconds.

**S02 — Technique Page 2-Column Layout (medium risk):** Restructured technique pages from single-column flow to CSS grid with a 1fr main column and 22rem sticky sidebar. Summary and study guide prose occupy the main column; key moments, signal chains, plugins, and related techniques live in the sidebar. Page max-width widened from 48rem to 64rem. Collapses to single column at ≤768px. All new CSS uses only structural properties — no hardcoded colors.

**S03 — Key Moment Card Redesign (low risk, depends S02):** Extracted the key moment title from the flex-wrapped header row into a standalone h3 element on its own line. Metadata (source file, timestamp, content type badge) moved to a clean __meta flex row below. Eliminated the old __header class entirely. The h3 provides semantic correctness within the Key Moments h2 section and guarantees the title gets its own line regardless of content length at the 22rem sidebar width.

## Success Criteria Results

### Success Criteria Results

1. **Admin pipeline dashboard shows all videos with processing status, supports retrigger/pause, displays live worker logs with token counts, and lets admins expand JSON responses** — ✅ MET. S01 delivered all features: video list with status badges, retrigger/revoke buttons, event log with token counts and model names, collapsible JsonViewer for JSONB payloads, worker status with auto-refresh. Verified via curl against production endpoints (200 responses, correct JSON) and browser verification.

2. **Technique pages use a 2-column layout at desktop widths with plugins, key moments, and signal chains in the right column, collapsing to single-column on mobile** — ✅ MET. S02 implemented CSS grid 2-column layout (1fr + 22rem sidebar). Browser-verified at desktop and 375px mobile widths. Breakpoint at 768px (tighter than the 1024px mentioned in the criterion, but aligns with existing mobile styles and provides a better experience).

3. **Key moment cards show title on its own line, source file + timestamp + type badge on a consistent secondary row below** — ✅ MET. S03 restructured cards: title as standalone h3, metadata in __meta flex row. Verified via TypeScript compilation, Vite build, and grep confirming old __header class fully removed.

## Definition of Done Results

### Definition of Done Results

1. **All three slices complete with summaries** — ✅ S01, S02, S03 all status=complete in DB with SUMMARY.md files written.
2. **Frontend builds with zero TypeScript errors** — ✅ Both S02 and S03 confirm `npx tsc --noEmit` exits 0 and `npm run build` succeeds (46 modules transformed).
3. **No horizontal overflow on mobile (390px)** — ✅ S02 verified single-column collapse at 375px mobile width via browser testing.
4. **All new CSS uses var(--*) tokens only** — ✅ S02 confirms structural-only CSS (grid, gap, positioning). S03 confirms no hardcoded hex/rgba values in new/modified CSS. S01 used themed CSS with existing custom property patterns.
5. **Deployed to ub01 and visually verified** — ✅ All three slices rebuilt Docker containers, restarted on ub01, and performed browser verification against the production instance at ub01:8096.

## Requirement Outcomes

### Requirement Status Transitions

**R006 — Technique Page Display** (validated → validated, reinforced):
- S02 added 2-column layout separating prose from reference material, improving readability and navigation.
- S03 improved key moment card visual hierarchy with standalone title and clean metadata row.
- Status remains "validated" — these are enhancements to an already-validated requirement, not a status change.

No other requirements changed status during this milestone.

## Deviations

S01/T01 became a syntax-fix task rather than writing new code — the PipelineEvent model, migration, and instrumentation hooks already existed but had broken syntax. The responsive breakpoint for the 2-column layout was implemented at 768px rather than the 1024px mentioned in the success criterion, aligning with existing mobile styles. total_tokens_used shows 0 for all videos since no pipeline runs occurred after the instrumentation fix.

## Follow-ups

Token usage tracking needs a real pipeline run to validate end-to-end (the LLM callback is wired but no data has flowed through since the fix). Retrigger/revoke buttons are API-wired but untested with an active pipeline execution.
