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A template is a directory that knows how to be cloned. It contains the app’s code (backend, optional frontend, MCP server) plus a clone.manifest.json that tells the CLI everything it needs to spin, migrate, health-check, and seed it. Templates live under the templates directory (the monorepo apps/ by default; override with ASYM_TEMPLATES_DIR). The published CLI bundles each manifest with its compose file, so it resolves templates from its own bundle with no monorepo present. The CLI discovers a template by reading each manifest’s name — so apps/slack-clone/ declares the name slack, which is what you type in hone env spin slack.

The manifest

Here’s the Slack template’s clone.manifest.json, annotated:
Backends declare an image (pulled and digest-pinned at spin). A service can instead declare build for a local build context — today only Slack’s optional frontend does.

Fields that matter

Ready-made templates

Six templates ship today. Each backend is a published image; verify scores it against the real product’s live API documentation.

Slack

RPC Web API, MCP server, and a frontend. The {ok} envelope, Slack-format ids, byte-identical events. Modes: api, full.

Stripe

REST API: customers, payments, invoices, subscriptions, refunds, and signed webhooks. API-only.

Notion

REST API: databases, data sources, pages, blocks, views, comments, file uploads, search — with Notion’s rate limits. API-only.

HubSpot

CRM REST API: generic objects, v4 associations, properties, pipelines, owners, OAuth tokens, and HubSpot-accurate rate limiting. API-only.

GitHub

REST API: repos, issues, pull requests, comments, labels, tokens, and rate limiting. API-only.

Linear

GraphQL API: issues, projects, teams, cycles, and webhooks. API-only.
Default container ports are slack 3001, linear 3002, stripe 3003, notion 3004, hubspot 3005, github 3006; the host port for each clone is allocated at spin time from your range (default 3000–3999). Templates are built and maintained by Hone — you spin and use them, you don’t author your own.