> ## Documentation Index
> Fetch the complete documentation index at: https://docs.nasiko.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Attach/detach a reusable LLM config to an agent, and optionally change the

> Attach/detach a reusable LLM config to an agent, and optionally change the
inbound SDK format. A config can only be attached if it belongs to the
agent owner. Owner-or-superuser only.



## OpenAPI

````yaml /api-reference/openapi.json patch /api/agents/{id}/llm-config
openapi: 3.1.0
info:
  title: Nasiko API
  description: >-
    HTTP API for the Nasiko OpenRuntime: agents, coding harnesses, TokenOps,
    routing, MCP, and secrets. Spec is generated from annotated routes; some
    surfaces are documented on the hand-written pages alongside this file.
  license:
    name: ''
  version: 0.1.0
servers: []
security: []
tags:
  - name: secrets
    description: Encrypted per-user agent secrets
  - name: catalog
    description: >-
      Agent catalog: registration, discovery, versions, per-agent secrets, and
      source import
  - name: agents
    description: >-
      Agent lifecycle: deployments, LLM routing config, update/rollback,
      upload-and-deploy
  - name: orchestrator
    description: >-
      A2A dispatch: routing-engine/ReAct orchestrator and direct agent chat,
      plus routing stats
  - name: users
    description: >-
      User management: CRUD, roles, credentials, accessible agents
      (superuser-only)
  - name: usage
    description: Per-user token usage and cost reporting
  - name: observability
    description: Sessions, traces, spans, agent logs, and FinOps reporting
  - name: llm-router
    description: LLM routing presets, provider/model catalog, and tier→model registry
  - name: mcp
    description: >-
      MCP gateway: agent-facing JSON-RPC tool calls, connector
      registration/upload/sharing, credentials & OAuth, and per-agent tool
      permissions
paths:
  /api/agents/{id}/llm-config:
    patch:
      tags:
        - agents
      summary: >-
        Attach/detach a reusable LLM config to an agent, and optionally change
        the
      description: >-
        Attach/detach a reusable LLM config to an agent, and optionally change
        the

        inbound SDK format. A config can only be attached if it belongs to the

        agent owner. Owner-or-superuser only.
      operationId: update_llm_config
      parameters:
        - name: id
          in: path
          description: Agent id
          required: true
          schema:
            type: string
            format: uuid
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/AttachLlmConfigRequest'
        required: true
      responses:
        '200':
          description: Updated, with the freshly resolved config
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/LlmConfigUpdateEnvelope'
        '400':
          description: Config not found/not owned, or unsupported inbound_format
        '403':
          description: Caller is not the agent owner
        '404':
          description: No such agent
components:
  schemas:
    AttachLlmConfigRequest:
      type: object
      description: >-
        Attach/detach a reusable LLM config to an agent, and optionally change
        the inbound format.

        A config can only be attached if it belongs to the agent owner (per-user
        ownership keeps the

        referenced secret in the owner's store). Owner-only (or superuser).
      properties:
        inbound_format:
          type:
            - string
            - 'null'
          description: >-
            Optionally change which SDK the agent's code speaks (drives deploy
            injection).
        llm_config_id:
          type:
            - string
            - 'null'
          format: uuid
          description: >-
            Double-option distinguishes the three cases: absent ⇒ leave
            unchanged; `null` ⇒ detach

            (fall back to the owner's default); a UUID ⇒ attach that config.
        pinned_model:
          type:
            - string
            - 'null'
          description: >-
            Agent-level model pin. Overrides the config's `pinned_model`.
            Double-option:

            absent ⇒ leave unchanged; `null` ⇒ clear pin; string ⇒ set pin.
    LlmConfigUpdateEnvelope:
      type: object
      description: '`crate::mcp::ApiResponse` envelope around [`LlmConfigUpdateResponse`].'
      required:
        - data
        - status_code
        - message
      properties:
        data:
          $ref: '#/components/schemas/LlmConfigUpdateResponse'
        message:
          type: string
        status_code:
          type: integer
          format: int32
          minimum: 0
    LlmConfigUpdateResponse:
      type: object
      description: |-
        Response envelope for `PATCH /{id}/llm-config` — documents the shape of
        the ad hoc `serde_json::json!` object the handler returns.
      required:
        - agent_id
        - source
      properties:
        agent_id:
          type: string
          format: uuid
        llm_config: {}
        llm_config_id:
          type:
            - string
            - 'null'
          format: uuid
        pinned_model:
          type:
            - string
            - 'null'
          description: Agent-level model pin after applying this update, or `null`.
        source:
          type: string

````