Visual Feedback Tool (Markup.io Clone)

A self-hosted visual feedback tool for agency client reviews. Clients drop a pin anywhere on a staging site, a PDF, or an uploaded image, and the team triages, discusses and resolves that feedback from one dashboard.

What it does and why

Collecting website feedback over email and screenshots is slow and loses context. This app gives each project a small script-tag widget. A client clicks on the page, writes a comment, and the widget sends the pin with its X/Y position, a DOM selector and a screenshot. The agency dashboard groups that feedback by client site and review round, keeps a threaded discussion per pin, and can push new feedback to Slack, Discord, a signed webhook or GitHub Issues.

It is built as a self-hosted alternative to hosted tools like Markup.io, with role-aware teams, workspace branding and a versioned developer API.

Key features

Client widget

• One <script> tag with data-api-key and data-project-id; no iframe
• Click-to-pin with X/Y coordinates, a DOM selector for re-anchoring, and a screenshot upload
• Keyboard and touch accessible, tested at 320px in Chromium, Firefox and WebKit
• Optional typed browser SDK (packages/markup-sdk) with mount(), startFeedback(), on() and destroy()

Dashboard

• Workspaces, teams and invitations with role enforcement on every API route
• Client sites with review rounds, sign-offs and reversible archiving
• Per-pin comment threads with @mentions, open/resolved status, and internal issue metadata (assignee, priority and similar fields)
• Developer context and structured hand-off on each pin
• PDF review (up to 50 pages, rendered server-side) and image review uploads
• Server-side recapture of a page with headless Chromium, with screenshot version history
• Managed public share links for client review without an account
• Workspace branding and a client review mode
• Live updates and presence over server-sent events

Integrations and API

• Durable outbound delivery queue for Slack, Discord, generic webhooks and GitHub Issues, with bounded retries and a dead-letter state
• Generic webhooks are signed with HMAC-SHA256 (X-Visual-Feedback-Signature)
• GitHub tokens are encrypted at rest with AES-256-GCM and never returned by the API
• Versioned developer API with project-scoped tokens and an OpenAPI 3 spec
• Member email notifications through Mailgun, with per-member, role-aware preferences

Security

• Session auth with CSRF and origin checks for the dashboard, project keys for the widget
• Rate limiting on pin, comment and screenshot status routes
• Strict input validation on IDs and uploads, plus an audit log of dashboard writes

Tech stack

• Next.js 16 (App Router, standalone output), React 19, TypeScript
• PostgreSQL with Prisma 6
• Tailwind CSS 4, Heroicons
• Vite for the standalone widget bundle (public/widget.js)
• npm workspaces: packages/markup-core (shared server helpers) and packages/markup-sdk (browser SDK)
• Vitest, Testing Library, jsdom and Supertest for unit and integration tests; Playwright for E2E
• Docker multi-stage build and Docker Compose for local development
• GitHub Actions for build, lint and tests

Getting started

Requirements: Docker with Compose, or Node.js 20+ and a PostgreSQL database.

With Docker Compose (recommended)

cp .env.example .env    # fill in the placeholders
docker compose up --build

The stack starts PostgreSQL, runs every Prisma migration in a one-shot migrate service, then serves the app at http://localhost:3030 (change it with APP_PORT).

With Node.js

npm install
cp .env.example .env    # set DATABASE_URL and the other required values
npx prisma migrate deploy
npm run dev

All environment variables are documented in .env.example. Required at runtime: DATABASE_URL, DASHBOARD_HOST, SCREENSHOTS_DIR, DELIVERY_WORKER_SECRET and INTEGRATION_ENCRYPTION_KEY. Mailgun settings are optional; email is a no-op without them.

Useful scripts

Command	What it does
npm run dev	Next.js dev server
npm run build	Builds the widget, the workspace packages, then the Next.js app
npm run build:widget	Builds public/widget.js with Vite
npm start	Runs the production build
npm run lint	ESLint

Embedding the widget

<script
  src="https://<your-host>/widget.js"
  data-api-key="<project apiKey>"
  data-project-id="<project uuid>"></script>

The dashboard shows the exact snippet for each project.

Developer docs

• Developer API v1
• OpenAPI spec (also served at /api/v1/openapi.json)
• Browser SDK
• Rate limit notes

Testing

npm test                  # Vitest: unit, integration, component and widget tests
npm run test:coverage     # same, with V8 coverage
npm run test:e2e          # Playwright in Chromium, Firefox and WebKit
npm run test:load:local   # local-only pin ingestion load rehearsal (needs the Compose stack)

Run npx playwright install chromium firefox webkit once before the E2E suite.

Project structure

.
├── src/
│   ├── app/             # Next.js App Router pages and API routes
│   ├── components/      # Dashboard UI
│   ├── lib/             # Auth, validation, integrations, review workflow, email
│   └── widget/          # Source for the embeddable widget
├── packages/
│   ├── markup-core/     # Shared server helpers
│   └── markup-sdk/      # Typed browser SDK
├── prisma/              # Schema and migrations
├── tests/               # unit, integration, components, widget, e2e
├── docs/                # API docs and plans
├── Dockerfile
└── docker-compose.yml   # Local development stack

License

MIT, see LICENSE.

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Built by Cameron Ashley at Ashbi Design.