> ## Documentation Index > Fetch the complete documentation index at: https://orbit.nckrtl.com/docs/llms.txt > Use this file to discover all available pages before exploring further. # Create a process definition > Project-owned definitions carry the runtime specification that production preparation copies into a new Instance. Changing a definition changes Project configuration only. ## OpenAPI ````yaml /openapi.json post /api/v1/projects/{project}/process-definitions openapi: 3.1.0 info: title: Orbit Gateway API version: v1 description: >- The HTTP API of the active Orbit Gateway. The CLI and the PHP SDK send every fleet command through these endpoints over WireGuard. See [Using the API](/api/overview) for transport, authentication, envelopes, and errors. servers: - url: https://gateway.orbit description: >- The active Gateway on the private WireGuard network, resolved by Orbit private DNS. security: [] tags: - name: Gateway description: >- Status and trust of the active Gateway, and the releases of the Gateway itself. - name: Nodes description: Machines in the fleet, their roles, access grants, and storage settings. - name: Clusters description: Groups of Nodes with one Router and one development TLD. - name: Firewall description: Named UFW rules on one Node. - name: Fleet rollout description: >- The rollout of each verified Gateway release to the managed Nodes, and its catch-up. - name: Tools description: Packages that Orbit installs on a Node through a Tool Manager. - name: Metrics description: The Prometheus and Grafana role and its exporters. - name: GitHub App description: The Gateway's own read-only GitHub App and the accounts that installed it. - name: Analytics description: >- The analytics role, its Plausible version, and the Stats API key the Gateway uses to read visits. - name: Projects description: Repository records with one type, default branch, and web root each. - name: Instances description: Development checkouts and production releases of a Project on one Node. - name: Environment description: Stored Instance environment configuration and its .env projection. - name: Routes description: Domains that reach an Instance. - name: Database connections description: The registry of mysql, pgsql, and sqlite connections. - name: Processes description: >- systemd services and Docker containers owned by an Instance, a Node, or a Project definition. - name: Schedules description: Recurring commands run by native systemd timers. - name: Annotations description: Instance annotations, T3 delivery, and replayable status events. - name: Tasks description: Commander feature groups and ordered subtasks. - name: Extensions description: Gateway-owned extension switches. - name: Doctor description: Verify-only drift checks across the fleet. - name: Activities description: The Gateway log of authorized commands. - name: proxycli description: CLIProxyAPI quota snapshots, provider pools, and account controls. - name: Vaultwarden description: The copy of database credentials into a Vaultwarden collection. - name: Conn description: >- Profiles, shared workspace settings, registered T3 servers, and the pairing links the Gateway mints on them for each Node. - name: Realtime description: >- The record-change event feed broadcast to Reverb, its channel authorization, and Reverb connection discovery. - name: Node callbacks description: Endpoints that managed Nodes and Caddy call; operators do not call them. paths: /api/v1/projects/{project}/process-definitions: post: tags: - Projects summary: Create a process definition description: >- Project-owned definitions carry the runtime specification that production preparation copies into a new Instance. Changing a definition changes Project configuration only. operationId: project-process-definition-create parameters: - name: project in: path required: true schema: type: integer minimum: 1 description: Numeric Project ID. requestBody: required: true content: application/json: schema: type: object properties: name: type: string pattern: ^[a-z0-9](?:[a-z0-9-]*[a-z0-9])?$(?![\s\S]) maxLength: 63 environments: type: array maxItems: 2 minItems: 1 items: type: string enum: - production spec: type: object properties: runtime: type: string enum: - systemd - docker command: type: array maxItems: 64 minItems: 1 items: type: string maxLength: 4096 image: type: - string - 'null' pattern: ^[A-Za-z0-9][A-Za-z0-9._\/:@-]*$(?![\s\S]) maxLength: 255 description: Conditionally required. working_directory: type: string pattern: ^\/(?!.*(?:^|\/)\.\.(?:\/|$))[^\x00\r\n]*$(?![\s\S]) maxLength: 4096 environment: type: object maxProperties: 100 propertyNames: pattern: ^[A-Za-z_][A-Za-z0-9_]*$(?![\s\S]) additionalProperties: type: string maxLength: 4096 pattern: ^[^\x00\r\n]*$(?![\s\S]) ports: type: array maxItems: 100 items: type: string pattern: >- ^(?:(?:\d{1,3}\.){3}\d{1,3}:)?\d{1,5}:\d{1,5}(?:\/(?:tcp|udp))?$(?![\s\S]) volumes: type: array maxItems: 100 items: type: object additionalProperties: false properties: source: type: string pattern: >- ^(?:\/[A-Za-z0-9._\/ -]+|[A-Za-z0-9][A-Za-z0-9_.-]*)$(?![\s\S]) maxLength: 4096 target: type: string pattern: ^\/[A-Za-z0-9._\/ -]*$(?![\s\S]) maxLength: 4096 read_only: type: boolean required: - source - target restart_policy: type: string enum: - never - on-failure - always - unless-stopped keep_alive: type: boolean required: - runtime - command required: - name - environments - spec additionalProperties: false responses: '200': description: The request succeeded; an exact retry returned the existing record. content: application/json: schema: type: object properties: data: $ref: '#/components/schemas/ProjectRuntimeDefinition' meta: $ref: '#/components/schemas/Meta' required: - data - meta '201': description: Created. content: application/json: schema: type: object properties: data: $ref: '#/components/schemas/ProjectRuntimeDefinition' meta: $ref: '#/components/schemas/Meta' required: - data - meta '403': description: >- The caller is not an active WireGuard peer (`peer.identity_unknown`) or lacks Node access to the target (`node_access.required`). content: application/json: schema: $ref: '#/components/schemas/Error' '404': description: No record matches the path parameters. content: application/json: schema: $ref: '#/components/schemas/Error' '409': description: >- A guard refused the change and the Gateway changed nothing; `error.code` names the guard. content: application/json: schema: $ref: '#/components/schemas/Error' '422': description: >- The JSON body is not an object, has duplicate or unknown members, or fails validation (`validation.failed`). content: application/json: schema: $ref: '#/components/schemas/Error' x-codeSamples: - lang: bash label: curl source: > curl -sS -X POST "https://gateway.orbit/api/v1/projects/4/process-definitions" \ --cacert /path/to/orbit-root-ca.pem \ -H 'Accept: application/json' \ -H 'X-Orbit-Request-Id: 9d6b1e5c-4a3f-4a1b-9f0e-6d2c3f5a7b81' \ -H 'Content-Type: application/json' \ -d '{"name": "example", "environments": ["production"], "spec": {"runtime": "systemd", "command": ["/usr/bin/php", "artisan", "queue:work"]}}' - lang: php label: PHP SDK source: | send(new CreateProcessDefinitionRequest( projectId: 4, definition: '{"name": "queue", "environments": ["production"], "spec": {"runtime": "systemd", "command": ["/usr/bin/php", "artisan", "queue:work"]}}', ))->dto(); components: schemas: ProjectRuntimeDefinition: type: object properties: id: type: string project_id: type: integer name: type: string environments: type: array items: type: string spec: type: object additionalProperties: true Meta: type: object properties: request_id: type: string format: uuid description: >- The request ID the Gateway assigned or accepted; the same value is in the `X-Orbit-Request-Id` response header and in the Activity record. required: - request_id Error: type: object properties: error: type: object properties: code: type: string description: >- Stable error code, namespaced by family, such as `node.not_active` or `route.target_conflict`. message: type: string description: >- Safe message without credentials, environment values, or remote output. details: type: object additionalProperties: true description: >- Bounded, redacted details such as the conflicting record IDs or the failed validation rule. request_id: type: string format: uuid required: - code - message required: - error ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.