Mosaic Stack
Self-hosted, multi-user AI agent platform. One config, every runtime, same standards.
Mosaic gives you a unified launcher for Claude Code, Codex, OpenCode, and Pi — injecting consistent system prompts, guardrails, skills, and mission context into every session. A NestJS gateway provides the API surface, a Next.js dashboard gives you the UI, and a plugin system connects Discord, Telegram, and more.
Quick Install
bash <(curl -fsSL https://git.mosaicstack.dev/mosaic/mosaic-stack/raw/branch/main/tools/install.sh)
This installs both components:
| Component | What | Where |
|---|---|---|
| Framework | Bash launcher, guides, runtime configs, tools, skills | ~/.config/mosaic/ |
| @mosaicstack/mosaic | Unified mosaic CLI — TUI, gateway client, wizard, auto-updater |
~/.npm-global/bin/ |
After install, set up your agent identity:
mosaic init # Interactive wizard
Requirements
- Node.js ≥ 20
- npm (for global @mosaicstack/mosaic install)
- One or more runtimes: Claude Code, Codex, OpenCode, or Pi
Usage
Launching Agent Sessions
mosaic pi # Launch Pi with Mosaic injection
mosaic claude # Launch Claude Code with Mosaic injection
mosaic codex # Launch Codex with Mosaic injection
mosaic opencode # Launch OpenCode with Mosaic injection
mosaic yolo claude # Claude with dangerous-permissions mode
mosaic yolo pi # Pi in yolo mode
The launcher verifies your config, checks for SOUL.md, injects your AGENTS.md standards into the runtime, and forwards all arguments.
TUI & Gateway
mosaic tui # Interactive TUI connected to the gateway
mosaic login # Authenticate with a gateway instance
mosaic sessions list # List active agent sessions
Management
mosaic doctor # Health audit — detect drift and missing files
mosaic sync # Sync skills from canonical source
mosaic update # Check for and install CLI updates
mosaic wizard # Full guided setup wizard
mosaic bootstrap <path> # Bootstrap a repo with Mosaic standards
mosaic coord init # Initialize a new orchestration mission
mosaic prdy init # Create a PRD via guided session
Development
Prerequisites
- Node.js ≥ 20
- pnpm 10.6+
- Docker & Docker Compose
Setup
git clone git@git.mosaicstack.dev:mosaic/mosaic-stack.git
cd mosaic-stack
# Start infrastructure (Postgres, Valkey, Jaeger)
docker compose up -d
# Install dependencies
pnpm install
# Run migrations
pnpm --filter @mosaicstack/db run db:migrate
# Start all services in dev mode
pnpm dev
Infrastructure
Docker Compose provides:
| Service | Port | Purpose |
|---|---|---|
| PostgreSQL (pgvector) | 5433 | Primary database |
| Valkey | 6380 | Task queue + caching |
| Jaeger | 16686 | Distributed tracing UI |
| OTEL Collector | 4317/4318 | Telemetry ingestion |
Quality Gates
pnpm typecheck # TypeScript type checking (all packages)
pnpm lint # ESLint (all packages)
pnpm test # Vitest (all packages)
pnpm format:check # Prettier check
pnpm format # Prettier auto-fix
CI
Woodpecker CI runs on every push:
pnpm install --frozen-lockfile- Database migration against a fresh Postgres
pnpm test(Turbo-orchestrated across all packages)
npm packages are published to the Gitea package registry on main merges.
Architecture
mosaic-stack/
├── apps/
│ ├── gateway/ NestJS API + WebSocket hub (Fastify, Socket.IO, OTEL)
│ └── web/ Next.js dashboard (React 19, Tailwind)
├── packages/
│ ├── cli/ Mosaic CLI — TUI, gateway client, wizard
│ ├── mosaic/ Framework — wizard, runtime detection, update checker
│ ├── types/ Shared TypeScript contracts (Socket.IO typed events)
│ ├── db/ Drizzle ORM schema + migrations (pgvector)
│ ├── auth/ BetterAuth configuration
│ ├── brain/ Data layer (PG-backed)
│ ├── queue/ Valkey task queue + MCP
│ ├── coord/ Mission coordination
│ ├── forge/ Multi-stage AI pipeline (intake → board → plan → code → review)
│ ├── macp/ MACP protocol — credential resolution, gate runner, events
│ ├── agent/ Agent session management
│ ├── memory/ Agent memory layer
│ ├── log/ Structured logging
│ ├── prdy/ PRD creation and validation
│ ├── quality-rails/ Quality templates (TypeScript, Next.js, monorepo)
│ └── design-tokens/ Shared design tokens
├── plugins/
│ ├── discord/ Discord channel plugin (discord.js)
│ ├── telegram/ Telegram channel plugin (Telegraf)
│ ├── macp/ OpenClaw MACP runtime plugin
│ └── mosaic-framework/ OpenClaw framework injection plugin
├── tools/
│ └── install.sh Unified installer (framework + npm CLI)
├── scripts/agent/ Agent session lifecycle scripts
├── docker-compose.yml Dev infrastructure
└── .woodpecker/ CI pipeline configs
Key Design Decisions
- Gateway is the single API surface — all clients (TUI, web, Discord, Telegram) connect through it
- ESM everywhere —
"type": "module",.jsextensions in imports, NodeNext resolution - Socket.IO typed events — defined in
@mosaicstack/types, enforced at compile time - OTEL auto-instrumentation — loads before NestJS bootstrap
- Explicit
@Inject()decorators — required since tsx/esbuild doesn't emit decorator metadata
Framework (~/.config/mosaic/)
The framework is the bash-based standards layer installed to every developer machine:
~/.config/mosaic/
├── AGENTS.md ← Central standards (loaded into every runtime)
├── SOUL.md ← Agent identity (name, style, guardrails)
├── USER.md ← User profile (name, timezone, preferences)
├── TOOLS.md ← Machine-level tool reference
├── bin/mosaic ← Unified launcher (claude, codex, opencode, pi, yolo)
├── guides/ ← E2E delivery, orchestrator protocol, PRD, etc.
├── runtime/ ← Per-runtime configs (claude/, codex/, opencode/, pi/)
├── skills/ ← Universal skills (synced from agent-skills repo)
├── tools/ ← Tool suites (orchestrator, git, quality, prdy, etc.)
└── memory/ ← Persistent agent memory (preserved across upgrades)
Forge Pipeline
Forge is a multi-stage AI pipeline for autonomous feature delivery:
Intake → Discovery → Board Review → Planning (3 stages) → Coding → Review → Remediation → Test → Deploy
Each stage has a dispatch mode (exec for research/review, yolo for coding), quality gates, and timeouts. The board review uses multiple AI personas (CEO, CTO, CFO, COO + specialists) to evaluate briefs before committing resources.
Upgrading
Run the installer again — it handles upgrades automatically:
bash <(curl -fsSL https://git.mosaicstack.dev/mosaic/mosaic-stack/raw/branch/main/tools/install.sh)
Or use the CLI:
mosaic update # Check + install CLI updates
mosaic update --check # Check only, don't install
The CLI also performs a background update check on every invocation (cached for 1 hour).
Installer Flags
bash tools/install.sh --check # Version check only
bash tools/install.sh --framework # Framework only (skip npm CLI)
bash tools/install.sh --cli # npm CLI only (skip framework)
bash tools/install.sh --ref v1.0 # Install from a specific git ref
Contributing
# Create a feature branch
git checkout -b feat/my-feature
# Make changes, then verify
pnpm typecheck && pnpm lint && pnpm test && pnpm format:check
# Commit (husky runs lint-staged automatically)
git commit -m "feat: description of change"
# Push and create PR
git push -u origin feat/my-feature
DTOs go in *.dto.ts files at module boundaries. Scratchpads (docs/scratchpads/) are mandatory for non-trivial tasks. See AGENTS.md for the full standards reference.
License
Proprietary — all rights reserved.