mcp: project-plan — PBS Content Hub Phase 6 — Trello Sync & Workflow Bridge
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Lovebug MCP
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Sources/Dev/content-hub-phase6.md
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Sources/Dev/content-hub-phase6.md
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---
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created: '2026-05-31'
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path: Sources/Dev
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project: content-hub-phase6
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tags:
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- pbs
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- n8n
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- trello
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- instagram
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- automation
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- flask
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- mysql
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type: project-plan
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---
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# PBS Content Hub Phase 6 — Trello Sync & Workflow Bridge
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## Goal
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Close the workflow gap between Jenny's existing tools (Trello, Canva, Instagram) and the Content Hub built in Phase 5.
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The Phase 5 architecture assumed Jenny would create Stage 1 project records directly in the hub. She doesn't. Her planning lives in Trello, video work in Canva, posting in Instagram natively. Without Stage 1 records, the auto-match routine has nothing to match against, every published post falls into Needs Review, and the alert stream loses signal.
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Phase 6 makes the hub a *bridge* between Jenny's existing tools and the automation — not a destination she has to adopt. Specifically:
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1. Sync Jenny's Trello cards into hub projects so Stage 1 records exist by virtue of her existing planning.
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2. Handle non-recipe posts (book promos, lifestyle) deterministically via a `no-reply` project type, eliminating false alerts.
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3. Make the chat alert actionable: deep-link directly to the platform post detail page where the matching action can happen.
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4. Bring the matching action to the platform post page itself, since that's the natural landing surface from an alert.
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5. Add visual post recognition (thumbnails + LLM-generated fallback titles) so posts can be identified at a glance.
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## Locked Decisions
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### Decision 1: Trello → Hub Project Sync (One-Way Initially)
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n8n watches Jenny's content Trello board. When a card is created or moves into specific lists, n8n creates or updates a corresponding hub Project via the existing API.
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- **Source of truth:** Trello for project existence, title, status; hub for technical bindings (recipe link, platform post link).
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- **Field mapping (initial):**
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- Trello card title → Project title
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- Trello list → Project status (e.g. Planned → `raw`, Posted → match candidate)
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- Trello label or custom field → Project type (reel, recipe-video, shop-vlog, tip, no-reply)
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- Trello card ID stored on Project for round-trip identification
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- **Direction:** Trello → hub one-way for v1. Round-trip (hub status → Trello list) deferred until one-way is stable.
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### Decision 2: `no-reply` Project Type
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Add `no-reply` to the existing project type list. Projects of this type are explicitly non-actionable for the comment automation:
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- When a platform post is linked to a no-reply project, the comment workflow never attempts a recipe lookup.
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- No alert fires on comments to no-reply posts, regardless of keyword.
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- Jenny tags book promos, lifestyle posts, announcements as no-reply in Trello via label or designated list.
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Makes the non-recipe case explicit instead of inferred, with zero guessing on the workflow side.
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### Decision 3: Alert as Google Chat Card with Deep Link
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Replace the plain-text "Did not find a record!" message with a Chat Card containing:
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- Platform badge (instagram / tiktok)
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- Post thumbnail (fetched via Graph API)
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- Post title (manual > LLM-generated > first caption sentence)
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- Comment text + commenter handle
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- **Action button "Open in pbs-hub"** → links to `/admin/platform-posts/{platform_post_id}`
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Eliminates "copy ID from chat, switch tab, search by ID" entirely.
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### Decision 4: Matching Action on the Platform Post Page
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The platform post detail page gains a Link-to-Project action when no project is linked:
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- Project picker (searchable dropdown over existing projects, fed by Trello sync)
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- Inline "Create new project" option (rare, since Trello should populate most cases)
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- Quick "Mark no-reply" action that creates and links a no-reply project in one step
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Once linked, the page shows the linked project with an Unlink option as it does today.
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### Decision 5: Visual Post Recognition
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- Show the post thumbnail on the platform post detail page and in the platform posts list (fetched live from Graph API on page load; not stored).
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- **Title precedence:** manual title > LLM-generated > first caption sentence.
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- LLM title via a small Claude API call ("title this post in 3–5 words from its caption"), called once at post ingest and stored.
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- Manual override always wins. LLM is the fallback that gives no-reply posts and unmapped posts a readable handle.
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### Decision 6: Route by External ID
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Change `/admin/platform-posts/{internal_id}` to `/admin/platform-posts/{platform_post_id}` so chat alerts can construct deep links from webhook data without a lookup query. Cleaner, more shareable, and the route the chat card targets.
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### Decision 7: Hold-and-Flush for Held Comments
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Verify or implement the Phase 4 "Queue and Retry Pattern (Option B)": comments on unmatched posts that pass the keyword gate are held in a `pending_comments` table with a TTL (default 24h). When the post gets matched (via Trello sync, auto-match, or manual action), held comments flush and the DM goes out. After TTL, they expire silently — no DM, no noise.
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## Open Items
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- [ ] Which Trello board is the content board? Shared, or Jenny-only?
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- [ ] What signals project type in Trello: labels, lists, or a custom field?
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- [ ] Trigger for Trello → hub sync: webhook, polling, or n8n Trello node?
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- [ ] LLM title generation: at ingest, or lazy on first view?
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- [ ] Hold-and-flush TTL — is 24h the right default?
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- [ ] Round-trip Trello sync (hub status → Trello list): include or defer?
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## Build Phases
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### Target workflow after Phase 6
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```
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Jenny creates Trello card "Vegan Pimento Cheese reel"
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↓
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n8n syncs → Project record created in hub (status: raw, type: reel)
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↓
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Jenny links recipe to project (or via Trello custom field eventually)
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↓
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Jenny posts to Instagram natively
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↓
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IG webhook → n8n writes platform_posts → pings hub /api/match/run
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↓
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Hub auto-matches by recipe.post_id or keyword
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→ Match → status: live-matched, automation active
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→ No match → status: needs-review, chat card sent with deep link
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↓
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Travis taps card → lands on /admin/platform-posts/{id}
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→ Picks the right project from the dropdown → done
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→ Or marks as no-reply if it's a book promo → done, never alerts again
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```
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### Implementation steps
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1. Survey Jenny's current Trello board — columns, labels, card patterns.
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2. Define Trello ↔ Project field mapping with Jenny.
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3. Build n8n Trello → hub sync workflow (one-way, additive, idempotent).
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4. Add `no-reply` to project types (DB + UI).
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5. Refactor platform post URL routing to use `platform_post_id`.
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6. Replace plain-text alert with Google Chat card + deep-link button.
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7. Add Link-to-Project action on platform post detail (picker + create-new + mark-no-reply).
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8. Add thumbnail + LLM title to platform post ingest + detail page.
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9. Verify or implement hold-and-flush with TTL.
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10. Test end-to-end on staging: Trello card → publish → match → comment → DM.
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## Notes
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### Scope boundaries — not in Phase 6
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- Round-trip Trello sync (hub → Trello). Deferred until one-way is stable.
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- Caption authoring or scheduling from the hub. Jenny continues posting natively.
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- Cross-platform parity (TikTok/YouTube). Phase 6 keeps Instagram as the primary path; other platforms inherit the bridge model but their detection workflows are separate efforts.
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- Embedding pipeline / vector search (separate `pbs-hub-vector-search` project, deferred).
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### Context from prior phases
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Phase 5 designed and largely built the Content Hub around a project-centric data model: Projects link to Recipes (from WordPress) and to Platform Posts (from Instagram, TikTok). The auto-match routine, two-stage lifecycle, and "Needs Review" status are already designed there. Phase 6 builds on top — it does not replace any Phase 5 decisions.
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Related: `content-hub-phase5-architecture`, `content-hub-phase5-planning`, `instagram-reel-sync-phase4`, `instagram-automation-content-hub-plan`.
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### Key insight underlying this phase
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The original Phase 5 plan made a single structural assumption that quietly broke the workflow in practice: Jenny would create Stage 1 records directly in the hub. Recognizing she doesn't — that her planning lives in Trello — reframes the hub from "a tool Jenny adopts" to "a bridge between her tools and the automation." Phase 6 is the consequence of seeing that.
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