tessera/CLAUDE.md

Tessera

Open-source ticketing system — Request Tracker's paradigm rebuilt in modern TypeScript.

Architecture

tessera/
├── src/                    # Backend: Bun + Hono + Drizzle ORM
│   ├── index.ts            # Hono server entry (port 9876)
│   ├── config.ts           # Zod-validated env config
│   ├── db/                 # Drizzle ORM schema + migrations
│   ├── routes/             # REST API endpoints
│   ├── models/             # TypeScript types + Zod schemas
│   ├── scrip/              # Scrip engine (prepare/commit two-phase)
│   └── lifecycle/          # State machine validator
├── web/                    # Frontend: Next.js 16 + shadcn/ui
│   ├── src/app/            # App Router pages
│   ├── src/components/     # Reusable components + widgets
│   └── src/lib/            # API client + types + utils
├── drizzle/                # SQL migration files
└── docs/                   # Architecture + design specs

Stack

Backend: Bun runtime, Hono web framework, Drizzle ORM, PostgreSQL 17, Zod validation, Handlebars templates, nodemailer

Frontend: Next.js 16 App Router (Turbopack), shadcn/ui (Tailwind CSS), next-themes, date-fns, lucide-react icons

Fonts: Inter (variable), JetBrains Mono

Running Locally

Prerequisites

• Bun (nix-shell -p bun or install globally)
• Node.js 22+ (nix-shell -p nodejs_22)
• Docker (for PostgreSQL)
• PostgreSQL container: docker run -d --name tessera-db -e POSTGRES_USER=tessera -e POSTGRES_PASSWORD=*** -e POSTGRES_DB=tessera -p 127.0.0.1:5433:5432 postgres:17-alpine

Start backend

cd ~/projects/tessera
cp .env.example .env
npm run dev:backend   # Starts API on port 9876

Run migrations

npm run db:migrate
npm run db:seed         # Demo data
npm run db:seed:reset   # Reset + re-seed

Start frontend

cd web
npm install             # Use npm, NOT bun
bun run dev             # Dev server on 127.0.0.1:3100 (HMR)

API Endpoints

All endpoints on port 9876. Frontend proxies /api/* via next.config.ts.

Method	Path	Description
GET	/health	Health check
GET	/tickets	List tickets (?queue_id=&status=&owner_id=&team_id=&q=&limit=&cf.*=)
POST	/tickets	Create ticket
GET	/tickets/:id	Get ticket with custom fields
PATCH	/tickets/:id	Update ticket (validates lifecycle, runs scrips, returns scrip_results)
POST	/tickets/:id/preview	Dry-run scrips for status change
POST	/tickets/:id/comment	Add comment to ticket
GET	/tickets/:id/transactions	List ticket transactions
GET/POST/PATCH	/queues	CRUD queues
GET/POST/PATCH/DELETE	/scrips	CRUD scrips
GET/POST/PATCH	/custom-fields	CRUD custom fields
GET/POST/PATCH	/lifecycles	CRUD lifecycles
GET/POST/PATCH/DELETE	/users	CRUD users
GET/POST/PATCH/DELETE	/templates	CRUD templates + POST /preview
GET/POST/PATCH/DELETE	/views	CRUD saved views
GET/POST/PATCH/DELETE	/teams	CRUD teams + POST/DELETE members
GET/POST/PATCH/DELETE	/dashboards	CRUD dashboards + widgets + widget data

Key Design Decisions

• Ticket IDs are sequential integers (1, 2, 3...), formatted as TKT-0001 for display. No UUIDs.
• Transaction-centric: Every state change creates a transaction record. The scrip engine runs on transactions.
• Two-phase scrip engine: Prepare (no side effects) then Commit (execute actions). Supports dry-run mode.
• Lifecycle state machines: Per-queue configurable status transitions with wildcard support.
• SQL-level filtering: Ticket filters (status, queue, owner, team, custom fields) pushed to PostgreSQL via Drizzle WHERE clauses.
• No ORM for frontend: Drizzle is only on the backend. Frontend uses a typed fetch wrapper (web/src/lib/api.ts).
• Dev server over production: Use bun run dev (port 3100) with HMR. Build+restart only when dev server has issues.
• Design consistency: See docs/design-system.md for the design rules applied across the app.

Git Workflow

Repo: https://git.gjermund.xyz/gjermund/tessera

git remote set-url origin https://gjermund:TOKEN@git.gjermund.xyz/gjermund/tessera.git

Common Issues

• Frontend shows skeleton/blank page: Dev server may have HMR issues. Kill port 3100, rebuild with npm run build, restart with npm run start.
• Backend not running on 9876: Restart with bun run src/index.ts. Check port with ss -tlnp | grep 9876.
• Database connection refused: Docker container may be stopped. docker start tessera-db.
• Build errors after migration: Run bun run src/db/migrate.ts to apply new migrations.