Branch

Autonomous feature-development agent. File a GitHub issue → minutes later a real PR opens against a forked-from-production database, schema-verified through a federated GraphQL supergraph, packaged in a Chainguard-hardened Wolfi image.

A typical run takes ~60 seconds against real infrastructure: GLM 5.1 plans the change, Ghost forks production, Drizzle applies the migration to the fork, the Cosmo Router proves the new schema works across three federated subgraphs, the GitHub App opens the PR, and apko builds the per-PR preview image with a CVE delta vs node:20.

What the demo shows (live, not narrated)

1. Issue lands — "Add VAT support for EU customers"
2. Plan — GLM 5.1 emits a strict-JSON plan over an OpenAI-compatible endpoint
3. Fork — Ghost copy-on-write clone of branch-prod; the card shows the real postgresql://tsdbadmin:…@*.tsdb.cloud.timescale.com:36019/tsdb URL
4. Migrate — drizzle-kit applies the new migration to the fork
5. Verify — federated query (customers { orders { … } } + searchProducts(…)) round-trips through Cosmo Router → 3 Pothos subgraphs → Postgres
6. PR — GitHub App commits 3 files via the git-data API and opens a real PR on a demo repo
7. Image — cgr.dev/chainguard/apko builds the preview runtime; cgr.dev/chainguard/grype reports the CVE delta vs vanilla node:20

Sponsor leverage

Run it

Requires Docker Desktop and Node ≥ 22.

pnpm install
pnpm demo:live          # boots Postgres + NATS + Cosmo Router + 3 subgraphs + web
                        # → http://localhost:3000  →  click "Run demo"
pnpm demo:down          # stop everything

For zero-credentials narration mode (every sponsor falls back to a rich mock):

pnpm demo

Live-mode credentials are documented in deploy.md. sponsors.md has the per-sponsor pitch in long form.

Architecture

• apps/web/ — Next.js 16 dashboard + SSE orchestrator (src/lib/orchestrator/run.ts)
• packages/adapters/{ghost,github,chainguard,wundergraph,insforge}/ — live + mock adapters, auto-fallback when creds are missing
• packages/shared/ — zod schemas, env parser, run-event types, demo fixtures
• packages/db/ — Drizzle schema, migrations, idempotent seed
• services/subgraphs/{customers,orders,catalog}/ — Pothos federation subgraphs over Drizzle
• services/cosmo-router/ — Cosmo supergraph router config, persisted operations, NATS event provider
• services/preview-builder/apko.yaml — Chainguard Wolfi image spec for per-PR previews
• services/agents/{planner,executor}/ — Guild coded-agent projects

MCP for any client

Point Claude Desktop / Cursor / any MCP client at the running router:

{ "mcpServers": { "branch": { "transport": "http", "url": "http://localhost:5025/mcp" } } }

Tools exposed: execute_graphql, execute_operation_{get_customer_by_id, list_customers, search_products}, get_operation_info, get_schema.

Scripts

Built With

• typescript