--- name: loftur description: >- Spin up and ship real, multi-tenant websites and web apps on Loftur — a runtime you drive over MCP. Use when the user wants to create, edit, or deploy a site, page, or small app that needs hosting, a database, auth, secrets, email, file uploads, or a CMS, without setting up any infrastructure. With one account token you can claim {subdomain}.loftur.app names on demand and build each one live. --- # Loftur — one token: claim subdomains and ship real sites Loftur is a **runtime, not a chat box**. You (the agent) are the developer's hands: with ONE account token you connect to a single MCP endpoint and can **claim new `{subdomain}.loftur.app` sites on demand** and **build any of them** — file-based routes, SSR Preact + hydrated islands, a per-site SQL database, passwordless end-user auth, encrypted secrets, transactional email, uploads, realtime, and any npm package. No local dev setup, no bundler, no deploy pipeline. You write files, preview, and publish immutable versions. ## 1. Connect once (account token → one MCP endpoint) The user creates an **account token** (`lftr_pat_…`) in their Loftur dashboard (https://loftur.app → sign in → **Agent access** → create token; shown once, revocable). Ask them for it if you don't have it. This token authenticates as their whole **account** — not a single site — so it can claim subdomains and build across all of their sites. **Claude Code / Openclaw (CLI):** ```bash claude mcp add loftur --transport http https://loftur.app/mcp \ --header "Authorization: Bearer lftr_pat_your_account_token" ``` **Any MCP client (JSON config):** ```json { "mcpServers": { "loftur": { "type": "http", "url": "https://loftur.app/mcp", "headers": { "Authorization": "Bearer lftr_pat_your_account_token" } } } } ``` **Connecting notes.** Some agent hosts only project a newly-added MCP server's tools into the *next* turn/session — if the `loftur.app` tools don't appear immediately after adding the server, start a fresh turn (or drive the endpoint directly with a small HTTP JSON-RPC client meanwhile). Calls to `/mcp` go over the network, so treat a transient network error (e.g. `ENETDOWN`) as retryable — retry the same tool call rather than assuming it failed. ## 2. Orient, then claim a site Everything below happens over that ONE connection. 1. **`site_help`** — the full authoring guide (route module shape, serverFns, the `env` capabilities, the feature database, auth, assets, GraphQL, islands, worked examples). It's global (no `site` needed) — read it any time; it's the source of truth. 2. **`whoami`** — the account email + every site you already own, and how to address them (each build tool takes a `site` argument). 3. **`claim_site({ subdomain })`** — provision a brand-new `{subdomain}.loftur.app` (e.g. `claim_site({ subdomain: "hermes" })`). It comes back live with its backend wired up. Build it immediately — no reconnect. 4. **`schema_types({ site })`** — TypeScript types generated from THAT site's LIVE CMS schema (per-site, so it needs a claimed `site`). You have no IDE hover, so this is how you learn exact field names. Other account tools: `list_sites`, `rotate_site_key({ site })` (regenerate an owner key), `mint_editor_token({ site, label })` (hand a content editor a content-only token). ## 3. The build loop (every build tool takes `site`) ``` site_write({ site: "hermes", path: "routes/index.tsx", source: "…" }) # transpiled + gql-validated on write preview_site({ site: "hermes" }) # a live draft URL (30-min token) publish_site({ site: "hermes", message: "v1" }) # validates, smoke-renders, snapshots a version rollback_site({ site: "hermes", versionId }) # immutable history, byte-for-byte ``` - The `site` selector is the subdomain (or id) from `whoami`/`list_sites`/`claim_site`. - Files live in a **draft working tree**. `site_write` returns transpile/GraphQL errors immediately (non-fatal); `publish_site` hard-gates on the same validation. - **`shell({ site, command })`** is a real in-process bash over the draft (`grep`/`sed`/`awk`/`find`/pipes) for multi-file edits — hermetic: **no** real `git`/`tsc`/`node`/`npm`/network. Let the write pipeline + `publish_site` validate. - `reset_site({ site })` throws the draft away back to the published version. ## 4. What you can build (pointers — full detail in `site_help`) | Need | How | | ----------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------- | | Pages & routing | `routes/index.tsx` → `/`, `routes/posts/[slug].tsx` → `/posts/:slug`. Default-export a Preact component; optional `loader`, `head`, `action`. | | Content (CMS) | GraphQL via `query(env, gql\`…\`)`; DatoCMS-style (`allBlogPosts`, `blogPost(filter:…)`). Prototype with the `graphql_query` tool. | | Mutations / forms | A **serverFn** (`serverFn().validator().handler()`) in its own module under `functions/` — callable from a loader (server) AND an island (browser RPC). | | A real database | The **feature DB**: `feature_migrate({site, name, up})` to create tables, then Drizzle over `featuresDriver(env)` inside a serverFn. | | End-user auth | Built-in passwordless magic-link. `env.AUTH.requestMagicLink(email)`; read `user` (`{id, email, role}`) in any loader/serverFn. Roles via `set_user_role`. | | Secrets | `set_secret` tool → `env.SECRETS.get("NAME")` in server code. Never hardcode keys. | | Outbound HTTP | `fetch()` from server code (mediated + logged). Restrict with `allowedHosts` in `loki.config.json`. | | Email | `env.MAIL.send({to, subject, html})` from a serverFn. | | Uploads | `env.UPLOADS.put(key, base64)` → served at `/__uploads/`. | | Realtime | `env.REALTIME.publish(channel, msg)` (server) + `connectChannel(name, cb)` (island). | | Interactivity | An **island**: `` — SSR'd + hydrated. | | Static assets | `site_asset_import({site, path:"public/og.png", url})` → served at the site root. | | npm packages | Just `import` any pure-ESM, workerd-compatible package — resolved & snapshotted at write time, no install. | | Starters | `scaffold_template` lists & writes starters (e.g. members area, link-in-bio). | ## 5. Guardrails (avoid the common traps) - **serverFn modules export ONLY serverFns** (+ `import type`). A component or other value export in the same file is rejected — put helpers/components elsewhere. - **Casing:** `env.RECORDS.create(model, fields)` takes **snake_case** field keys; GraphQL reads the same fields in **camelCase**. - **Secrets** go in `env.SECRETS`, never in a module the browser imports (only serverFn modules are stubbed out of the client build). - **Migration guard:** deleting a CMS field/model a published site depends on is rejected. Safe order: expand → backfill → publish → contract. - **No Node builtins** in site code (no `nodejs_compat`); capabilities are the `env` bindings + mediated `fetch()`. - Relative imports include the extension: `import { X } from "./lib/x.tsx"`. ## 6. A good first run > "Spin me up a personal site with a home page, an about page, and a working > contact form that emails me." 1. `claim_site({ subdomain: "yourname" })`. 2. `site_help`, then `schema_types({ site: "yourname" })`. 3. `site_write` `routes/index.tsx` + `routes/about.tsx` + `styles.css` (each with `site`). 4. A `functions/contact.ts` serverFn that validates input and calls `env.MAIL.send` (tell the owner to `set_secret` if a third-party key is needed). 5. `site_write` `routes/contact.tsx` with a form island calling the serverFn. 6. `preview_site({ site: "yourname" })` → open the URL, check it, iterate. 7. `publish_site({ site: "yourname", message: "initial site" })`. It's live at `https://yourname.loftur.app`. Claim the next idea whenever you want. --- Loftur is open source (https://github.com/jokull/loftur) — self-host the whole runtime on your own Cloudflare account and serve tenants under your own domain. This skill's latest version is always at **https://loftur.app/skill.md**.