docs: move API reference to docs/api.md and add Jobs endpoints

Extracts the REST API section from README.md into a dedicated
docs/api.md. Adds documentation for the four Jobs endpoints
(GET/PUT /api/jobs, GET /api/jobs/:id, POST /api/jobs/:id/run)
which existed in code but were not yet documented.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

README.md

@@ -37,176 +37,7 @@ Open [http://localhost:3000](http://localhost:3000).
 
 ## REST API
 
-All endpoints are under `/api`. Request and response bodies are JSON.
+See **[docs/api.md](docs/api.md)** for the full API reference.
-
-### Instances
-
-#### `GET /api/instances`
-
-Returns all instances sorted by name. All query parameters are optional.
-
-| Parameter | Type | Description |
-|---|---|---|
-| `search` | string | Partial match on `name`, `vmid`, or `stack` |
-| `state` | string | Exact match: `deployed`, `testing`, `degraded` |
-| `stack` | string | Exact match: `production`, `development` |
-
-```
-GET /api/instances?search=plex&state=deployed
-```
-
-```json
-[
-  {
-    "vmid": 117,
-    "name": "plex",
-    "state": "deployed",
-    "stack": "production",
-    "tailscale_ip": "100.64.0.1",
-    "atlas": 1, "argus": 1, "semaphore": 0,
-    "patchmon": 1, "tailscale": 1, "andromeda": 0,
-    "hardware_acceleration": 1,
-    "created_at": "2024-01-15T10:30:00",
-    "updated_at": "2024-03-10T14:22:00"
-  }
-]
-```
-
----
-
-#### `GET /api/instances/stacks`
-
-Returns a sorted array of distinct stack names present in the registry.
-
-```
-GET /api/instances/stacks
-→ ["development", "production"]
-```
-
----
-
-#### `GET /api/instances/:vmid`
-
-Returns a single instance by VMID.
-
-| Status | Condition |
-|---|---|
-| `200` | Instance found |
-| `400` | VMID is not a valid integer |
-| `404` | No instance with that VMID |
-
----
-
-#### `GET /api/instances/:vmid/history`
-
-Returns the audit log for an instance — newest events first.
-
-| Status | Condition |
-|---|---|
-| `200` | History returned (may be empty array) |
-| `400` | VMID is not a valid integer |
-| `404` | No instance with that VMID |
-
-```json
-[
-  {
-    "id": 3,
-    "vmid": 117,
-    "field": "state",
-    "old_value": "testing",
-    "new_value": "deployed",
-    "changed_at": "2024-03-10T14:22:00"
-  },
-  {
-    "id": 1,
-    "vmid": 117,
-    "field": "created",
-    "old_value": null,
-    "new_value": null,
-    "changed_at": "2024-01-15T10:30:00"
-  }
-]
-```
-
----
-
-#### `POST /api/instances`
-
-Creates a new instance. Returns the created record.
-
-| Status | Condition |
-|---|---|
-| `201` | Created successfully |
-| `400` | Validation error — see `errors` array in response |
-| `409` | VMID already exists |
-
-**Request body:**
-
-| Field | Type | Required | Notes |
-|---|---|---|---|
-| `name` | string | yes | |
-| `vmid` | integer | yes | Must be > 0 and unique |
-| `state` | string | yes | `deployed`, `testing`, or `degraded` |
-| `stack` | string | yes | `production` or `development` |
-| `tailscale_ip` | string | no | Valid IPv4 or empty string |
-| `atlas` | 0\|1 | no | |
-| `argus` | 0\|1 | no | |
-| `semaphore` | 0\|1 | no | |
-| `patchmon` | 0\|1 | no | |
-| `tailscale` | 0\|1 | no | |
-| `andromeda` | 0\|1 | no | |
-| `hardware_acceleration` | 0\|1 | no | |
-
----
-
-#### `PUT /api/instances/:vmid`
-
-Replaces all fields on an existing instance. Accepts the same body shape as `POST`. The `vmid` in the body may differ from the URL — this is how you change a VMID.
-
-| Status | Condition |
-|---|---|
-| `200` | Updated successfully |
-| `400` | Validation error |
-| `404` | No instance with that VMID |
-| `409` | New VMID conflicts with an existing instance |
-
----
-
-#### `DELETE /api/instances/:vmid`
-
-Deletes an instance. Only instances on the `development` stack may be deleted.
-
-| Status | Condition |
-|---|---|
-| `204` | Deleted successfully |
-| `400` | VMID is not a valid integer |
-| `404` | No instance with that VMID |
-| `422` | Instance is on the `production` stack |
-
----
-
-### Backup
-
-#### `GET /api/export`
-
-Downloads a JSON backup of all instances as a file attachment.
-
-```json
-{
-  "version": 1,
-  "exported_at": "2024-03-10T14:22:00.000Z",
-  "instances": [ ... ]
-}
-```
-
-#### `POST /api/import`
-
-Replaces all instances from a JSON backup. Validates every row before committing — if any row is invalid the entire import is rejected.
-
-| Status | Condition |
-|---|---|
-| `200` | Import successful — returns `{ "imported": N }` |
-| `400` | Body missing `instances` array, or validation errors |
 
 ---
 

docs/api.md

@@ -0,0 +1,283 @@
+# Catalyst API Reference
+
+All endpoints are under `/api`. Request and response bodies are JSON.
+
+---
+
+## Instances
+
+#### `GET /api/instances`
+
+Returns all instances sorted by name. All query parameters are optional.
+
+| Parameter | Type | Description |
+|---|---|---|
+| `search` | string | Partial match on `name`, `vmid`, or `stack` |
+| `state` | string | Exact match: `deployed`, `testing`, `degraded` |
+| `stack` | string | Exact match: `production`, `development` |
+
+```
+GET /api/instances?search=plex&state=deployed
+```
+
+```json
+[
+  {
+    "vmid": 117,
+    "name": "plex",
+    "state": "deployed",
+    "stack": "production",
+    "tailscale_ip": "100.64.0.1",
+    "atlas": 1, "argus": 1, "semaphore": 0,
+    "patchmon": 1, "tailscale": 1, "andromeda": 0,
+    "hardware_acceleration": 1,
+    "created_at": "2024-01-15T10:30:00",
+    "updated_at": "2024-03-10T14:22:00"
+  }
+]
+```
+
+---
+
+#### `GET /api/instances/stacks`
+
+Returns a sorted array of distinct stack names present in the registry.
+
+```
+GET /api/instances/stacks
+→ ["development", "production"]
+```
+
+---
+
+#### `GET /api/instances/:vmid`
+
+Returns a single instance by VMID.
+
+| Status | Condition |
+|---|---|
+| `200` | Instance found |
+| `400` | VMID is not a valid integer |
+| `404` | No instance with that VMID |
+
+---
+
+#### `GET /api/instances/:vmid/history`
+
+Returns the audit log for an instance — newest events first.
+
+| Status | Condition |
+|---|---|
+| `200` | History returned (may be empty array) |
+| `400` | VMID is not a valid integer |
+| `404` | No instance with that VMID |
+
+```json
+[
+  {
+    "id": 3,
+    "vmid": 117,
+    "field": "state",
+    "old_value": "testing",
+    "new_value": "deployed",
+    "changed_at": "2024-03-10T14:22:00"
+  },
+  {
+    "id": 1,
+    "vmid": 117,
+    "field": "created",
+    "old_value": null,
+    "new_value": null,
+    "changed_at": "2024-01-15T10:30:00"
+  }
+]
+```
+
+---
+
+#### `POST /api/instances`
+
+Creates a new instance. Returns the created record.
+
+| Status | Condition |
+|---|---|
+| `201` | Created successfully |
+| `400` | Validation error — see `errors` array in response |
+| `409` | VMID already exists |
+
+**Request body:**
+
+| Field | Type | Required | Notes |
+|---|---|---|---|
+| `name` | string | yes | |
+| `vmid` | integer | yes | Must be > 0 and unique |
+| `state` | string | yes | `deployed`, `testing`, or `degraded` |
+| `stack` | string | yes | `production` or `development` |
+| `tailscale_ip` | string | no | Valid IPv4 or empty string |
+| `atlas` | 0\|1 | no | |
+| `argus` | 0\|1 | no | |
+| `semaphore` | 0\|1 | no | |
+| `patchmon` | 0\|1 | no | |
+| `tailscale` | 0\|1 | no | |
+| `andromeda` | 0\|1 | no | |
+| `hardware_acceleration` | 0\|1 | no | |
+
+---
+
+#### `PUT /api/instances/:vmid`
+
+Replaces all fields on an existing instance. Accepts the same body shape as `POST`. The `vmid` in the body may differ from the URL — this is how you change a VMID.
+
+| Status | Condition |
+|---|---|
+| `200` | Updated successfully |
+| `400` | Validation error |
+| `404` | No instance with that VMID |
+| `409` | New VMID conflicts with an existing instance |
+
+---
+
+#### `DELETE /api/instances/:vmid`
+
+Deletes an instance. Only instances on the `development` stack may be deleted.
+
+| Status | Condition |
+|---|---|
+| `204` | Deleted successfully |
+| `400` | VMID is not a valid integer |
+| `404` | No instance with that VMID |
+| `422` | Instance is on the `production` stack |
+
+---
+
+## Jobs
+
+Jobs are background sync tasks that keep instance data up to date by pulling from external services (Tailscale, Patchmon, Semaphore). Each job runs on a configurable interval and can also be triggered on demand.
+
+Sensitive config fields (`api_key`, `api_token`) are always returned as `**REDACTED**`. Send `**REDACTED**` back in a `PUT` to preserve the stored value unchanged.
+
+#### `GET /api/jobs`
+
+Returns all jobs.
+
+```json
+[
+  {
+    "id": 1,
+    "key": "tailscale_sync",
+    "name": "Tailscale Sync",
+    "description": "Syncs Tailscale device status and IPs",
+    "enabled": 1,
+    "schedule": 15,
+    "config": { "api_key": "**REDACTED**", "tailnet": "example.com" },
+    "last_run_at": "2024-03-10T14:22:00",
+    "last_status": "success"
+  }
+]
+```
+
+---
+
+#### `GET /api/jobs/:id`
+
+Returns a single job and its last 10 run records, newest first.
+
+| Status | Condition |
+|---|---|
+| `200` | Job found |
+| `400` | ID is not a valid integer |
+| `404` | No job with that ID |
+
+```json
+{
+  "id": 1,
+  "key": "tailscale_sync",
+  "name": "Tailscale Sync",
+  "enabled": 1,
+  "schedule": 15,
+  "config": { "api_key": "**REDACTED**", "tailnet": "example.com" },
+  "runs": [
+    {
+      "id": 42,
+      "started_at": "2024-03-10T14:22:00",
+      "ended_at": "2024-03-10T14:22:01",
+      "status": "success",
+      "result": "3 updated of 12"
+    }
+  ]
+}
+```
+
+---
+
+#### `PUT /api/jobs/:id`
+
+Updates a job's enabled state, schedule interval, or configuration. All fields are optional — omitted fields are left unchanged. Config is merged with the existing config (partial updates are safe).
+
+| Status | Condition |
+|---|---|
+| `200` | Updated successfully — returns the updated job |
+| `400` | ID is not a valid integer |
+| `404` | No job with that ID |
+
+**Request body:**
+
+| Field | Type | Notes |
+|---|---|---|
+| `enabled` | boolean | `true` to enable, `false` to disable |
+| `schedule` | integer | Interval in minutes (default: 15) |
+| `config` | object | Merged with existing config — see per-job fields below |
+
+**Config fields by job key:**
+
+| Key | Field | Notes |
+|---|---|---|
+| `tailscale_sync` | `api_key` | Tailscale API key |
+| `tailscale_sync` | `tailnet` | Tailnet name (e.g. `example.com`) |
+| `tailscale_sync` | `run_on_create` | `true` to also run when a new instance is created |
+| `patchmon_sync` | `api_url` | Full URL to the Patchmon hosts endpoint |
+| `patchmon_sync` | `api_token` | `key:secret` credential or pre-encoded base64 |
+| `semaphore_sync` | `api_url` | Full URL to the Semaphore inventory endpoint |
+| `semaphore_sync` | `api_token` | Semaphore API token |
+
+---
+
+#### `POST /api/jobs/:id/run`
+
+Triggers a job to run immediately. Blocks until the job completes and returns the result. The run is recorded in the job's history regardless of outcome.
+
+| Status | Condition |
+|---|---|
+| `200` | Job completed successfully |
+| `400` | ID is not a valid integer |
+| `404` | No job with that ID |
+| `500` | Job handler threw an error (run is logged with `status: "error"`) |
+
+```json
+{ "summary": "3 updated of 12" }
+```
+
+---
+
+## Backup
+
+#### `GET /api/export`
+
+Downloads a JSON backup of all instances as a file attachment.
+
+```json
+{
+  "version": 1,
+  "exported_at": "2024-03-10T14:22:00.000Z",
+  "instances": [ ... ]
+}
+```
+
+#### `POST /api/import`
+
+Replaces all instances from a JSON backup. Validates every row before committing — if any row is invalid the entire import is rejected.
+
+| Status | Condition |
+|---|---|
+| `200` | Import successful — returns `{ "imported": N }` |
+| `400` | Body missing `instances` array, or validation errors |