Catalyst

A lightweight instance registry for tracking self-hosted infrastructure. No backend, no framework — just a browser, a SQLite database compiled to WebAssembly, and a static file server. :)

Structure

index.html        Entry point
css/app.css       Styles
js/
  config.js       Service definitions and seed data
  db.js           Data layer
  ui.js           Rendering, modals, notifications
  app.js          Router

Data layer

All reads and writes go through five functions in js/db.js. This is the boundary that would be replaced when wiring Catalyst to a real backend — nothing else in the codebase touches data directly.

getInstances(filters?)

Returns an array of instances, sorted by name. All filters are optional.

getInstances()
getInstances({ search: 'plex' })
getInstances({ state: 'degraded' })
getInstances({ stack: 'production' })
getInstances({ search: 'home', state: 'deployed', stack: 'production' })

search matches against name, vmid, and stack.

getInstance(vmid)

Returns a single instance by VMID, or null if not found.

getInstance(137) // → { id, name, vmid, state, stack, ...services, createdAt, updatedAt }

getDistinctStacks()

Returns a sorted array of unique stack names present in the registry. Used to populate the stack filter dynamically.

getDistinctStacks() // → ['development', 'production']

createInstance(data)

Inserts a new instance. Returns { ok: true } on success or { ok: false, error } on failure (e.g. duplicate VMID).

createInstance({
  name: 'plex',
  vmid: 117,
  state: 'deployed',        // 'deployed' | 'testing' | 'degraded'
  stack: 'production',
  tailscale_ip: '100.64.0.1',
  atlas: 1,
  argus: 1,
  semaphore: 0,
  patchmon: 1,
  tailscale: 1,
  andromeda: 0,
  hardware_acceleration: 1,
})

updateInstance(id, data)

Updates an existing instance by internal id. Accepts the same shape as createInstance. Returns { ok: true } or { ok: false, error }.

deleteInstance(id)

Deletes an instance by internal id. Only instances on the development stack can be deleted — this is enforced in the UI before deleteInstance is ever called.

---

Instance shape

Field	Type	Notes
id	integer	Internal autoincrement ID
vmid	integer	Unique. Used as the public identifier and in URLs (/instance/137)
name	string	Display name
state	string	deployed, testing, or degraded
stack	string	production or development
tailscale_ip	string	Optional
atlas	0 | 1
argus	0 | 1
semaphore	0 | 1
patchmon	0 | 1
tailscale	0 | 1
andromeda	0 | 1
hardware_acceleration	0 | 1
createdAt	ISO string	Set on insert
updatedAt	ISO string	Updated on every write

---

Versioning

Catalyst uses semantic versioning. The version in package.json is the source of truth and must match the release tag.

Change	Bump	Example
Bug fix	patch	1.0.0 → 1.0.1
New feature, backward compatible	minor	1.0.0 → 1.1.0
Breaking change	major	1.0.0 → 2.0.0

Cutting a release

1. Bump the version in package.json

"version": "1.1.0"

2. Commit, tag, and push

git add package.json
git commit -m "chore: release v1.1.0"
git tag v1.1.0
git push && git push --tags

Pushing the tag triggers the full pipeline: tests → build → release.

• The image is tagged :1.1.0, :1.1, and :latest in the Gitea registry
• A Gitea release is created at v1.1.0 with the image reference in the release notes

Pushes to main without a tag still run tests and build a :latest image — no release is created.