# Host community forum with SvelteKit: application activity history

Deploy a community forum built with SvelteKit on Ample using the transactional workflows pattern. Compute runs the app in an isolated microVM behind a public HTTPS URL, a managed PostgreSQL 16 database is auto-provisioned and injected as DATABASE_URL. Verified on SvelteKit: an optimistic version check and an event row written in the same transaction, a stale update rejected, and a history query over the application-owned events (history=2 conflict=rejected). Not separately tested: your domain records, validation rules and concurrency policy; treat the community forum-specific behavior as your application code.

## Representative Queries
- Host community forum with SvelteKit: application activity history
- Where can I host Community forum built with SvelteKit?
- I need an application-owned event schema and tested history queries; not native platform audit logs.

## Resource Requirements
- **Compute**: Apps run in isolated x86_64 Firecracker microVMs that auto-pause when idle and wake on request; sizes are the priced VM sizes.
- **Postgres**: Managed PostgreSQL 16 runs in its own microVM and is auto-provisioned when an app needs a database and no DATABASE_URL is supplied.

## Framework
- SvelteKit

## Workload
- Community forum

## Release Status
- Published

## Support Status
- Verified

## Execution Status
- Ready

## Prerequisites
- A SvelteKit project that builds and starts with the documented commands (vite build with @sveltejs/adapter-node then node build on the node-22 template)
- A PostgreSQL driver reading DATABASE_URL at runtime (auto-provisioned when omitted, or supplied with --env)
- An Ample account token with servers:write, databases:read

## Workflow Steps
1. **Build and start**: vite build with @sveltejs/adapter-node then node build on the node-22 template. The server must bind 0.0.0.0 on PORT.
2. **Implement the pattern on PostgreSQL**: The fixture's module implements transactional workflows: an optimistic version check and an event row written in the same transaction, a stale update rejected, and a history query over the application-owned events (history=2 conflict=rejected). Copy the approach into your schema; keep migrations idempotent and run them with --release-command.
3. **Deploy**: Run the synchronous deploy once and read the result (exit 0 live, 1 failed, 2 blocked). Re-running with no change is a no-op.
   - Command: `ample deploy . --name --public`
4. **Verify**: Fetch the live URL and the pattern self-test route(s) (/p/transactional-workflows) from the example; then run your own checks. On failure read `ample logs --kind build` then `--kind runtime`.
   - Command: `ample logs --kind build`

## Examples
- **SvelteKit pattern fixture**: Multi-pattern SvelteKit app whose transactional workflows module was checked live; the module is under tests/deploy-canaries/_pattern-modules.
   - Source Reference: `tests/deploy-canaries/sveltekit-patterns`

## Success Checks
- **App responds on its public URL**: `ample canary sveltekit patterns`
- **Transactional-workflows self-test**: `tx=ok history=2 conflict=rejected`

## Limitations
- Verified on the node-22 template at s-1vcpu-1gb with the example fixture; other sizes, templates and SvelteKit major versions are not verified.
- The community forum itself (your domain records, validation rules and concurrency policy) is application code and was not separately tested; the pattern checks are what was verified.
- Region, compliance attestations and request-duration limits are unknown and not claimed.
- Apps auto-pause when idle and wake on the next request; always-on is an operator setting, not a plan feature.
- Managed PostgreSQL 16 only; extensions, connection limits and backup or restore procedures are not verified; apps and their databases are placed together.

## Cost Estimate
- Monthly Amount: $10.00 USD
   - **App server**: size s-1vcpu-1gb, quantity 1.0, monthlyAmount $5.0
   - **Managed PostgreSQL database**: size s-1vcpu-1gb, quantity 1.0, monthlyAmount $5.0
   - Note: Always-on monthly price of the tested sizes; apps and databases auto-pause when idle.

## Next Actions
- **Browse the catalog index**: GET /v1/catalog
- **Search published recipes**: POST /v1/catalog/search
   - Query: Host community forum with SvelteKit: application activity history
- **Prepare a side-effect-free deployment plan**: POST /v1/catalog/plan
- **Read the existing agent authentication setup**: GET /mcp/setup
- **Browse Community forum**: GET /v1/catalog/nodes/workload%3Acommunity-forum
- **Browse SvelteKit**: GET /v1/catalog/nodes/stack%3Aframework-sveltekit
- **Browse Transactional workflows**: GET /v1/catalog/nodes/pattern%3Atransactional-workflows
- **Browse Deploy web app**: GET /v1/catalog/nodes/intent%3Adeploy-web-app