Amber: kanban board
A multi-user kanban board: sign-up, boards, columns, drag-and-drop cards. Go + SQLite without CGO, the front end is embedded in the binary.
- tests
- 7
- routes
- 18
12 projects
Backends
Services with an API, a database and tests. All Go for now; the language filter grows with the first project in another one.
- 386 tests
- 227 routes
- 24,370 lines of Go
Backends: Projects
Short: link shortener
Link shortening with aliases and expiry, click statistics by day, browser and device, a token-protected dashboard. IP addresses are not stored.
- tests
- 12
- routes
- 11
Appointment booking
Online booking: free slots computed from service duration and working hours, double-booking protection, an admin panel. A fictional studio, demo.
- tests
- 12
- routes
- 18
Pulse: uptime monitor
An uptime monitor: scheduled HTTP and TCP checks, uptime, p50/p95, an incident detector, a live SSE dashboard and a public status page. Go + SQLite without CGO.
- tests
- 18
- routes
- 15
Conveyor: job queue
A background job queue: priorities, delayed and cron jobs, retries with backoff and jitter, dead-letter, idempotency keys, leases with fencing, Prometheus metrics.
- tests
- 25
- routes
- 19
Rooms: realtime chat and board
Realtime rooms: chat with SQLite history, an online list, a typing indicator, a shared board with strokes and cursors, anonymous nicknames. WebSocket (RFC 6455) written on the stdlib.
- tests
- 48
- routes
- 7
Sluice: API gateway
An API gateway on the pure stdlib: host/prefix routes from a JSON config with hot reload that keeps connections alive, round-robin and least-conn balancing, health checks, a per-node circuit breaker, retries of idempotent requests, rate limiting, hashed API keys, Prometheus metrics and a live SSE dashboard.
- tests
- 48
- routes
- 11
Card Index: notes with search
A Markdown notes base on Go and SQLite: [[wiki]] links with backlinks and a link graph, FTS5 full-text search (bm25, highlighting, simplified Russian morphology), version history with its own diff, autosave with conflict resolution, .md export and import.
- tests
- 32
- routes
- 19
Raft KV: a key-value store on Raft
A from-scratch teaching implementation of Raft on the pure stdlib: leader election, log replication, quorum commit, a log and term/vote on disk with fsync, snapshots with compaction, linearizable reads (read-index) and follower-to-leader redirects. It is tested with a deterministic network and time simulator that checks linearizability; the dashboard can kill the leader and cut the network (demo).
- tests
- 27
- routes
- 13
Keyring: an authentication service
An authentication and authorization service in Go: EdDSA JWTs with key rotation and JWKS, refresh tokens with rotation and theft detection, TOTP 2FA (RFC 6238) with backup codes, RBAC, lockout on brute force, password reset by a one-time token, an audit log, a device list, openapi.yaml. Not independently audited, not a production IdP.
- tests
- 50
- routes
- 35
Ledger: personal finance tracker
Personal finance tracking: accounts in different currencies with manual exchange rates, income, expenses and transfers, budgets, payments on a cron-like schedule, CSV import with a preview, reports. Money is stored only in integer minor units, users' data is isolated, and the charts are drawn in SVG with no library. Go + SQLite with a Nuxt 4 front end.
- tests
- 30
- routes
- 45
Pixel Wall: a shared canvas
A shared 256x256 canvas in the spirit of r/place: 16 colors, a cooldown per session and IP, an own WebSocket layer on the stdlib (RFC 6455) with a binary protocol (4 bits per pixel), a snapshot plus deltas, a snapshot with a journal and recovery, a timelapse, zoom and pan, a minimap, PNG export and admin tools. A side project.
- tests
- 77
- routes
- 16