openapi: 3.2.0
info:
  title: HiveMorph v0.1 Xcalibur Echo API
  description: 'Polymorphic agent runtime — single shape (Merchant), single supermodel (W2 MERCHANT). Three gates: NEED + YIELD + CLEAN-MONEY.'
  version: 0.1.0
tags:
- name: xcalibur-echo
paths:
  /v1/xcalibur/echo/compress:
    post:
      tags:
      - xcalibur-echo
      summary: Compress a prompt with ECHO v1
      description: 'Compress a prompt using XCALIBUR ECHO v1 output-conditioned compression.


        Algorithm:

        1. Generate K=8 candidate compressions at increasing aggressiveness.

        2. Score each candidate using a deterministic TF-IDF surrogate

        (tfidf-deterministic-v1) that estimates content preservation.

        3. Select the best-scoring candidate that meets the target_ratio floor.

        4. Run one round of gradient-free sentence-drop mutation, keeping drops

        that keep the score at or above min_preservation.

        5. Return the compressed prompt and a signed Ed25519 receipt.'
      operationId: compress_prompt_v1_xcalibur_echo_compress_post
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/hivemorph__xcalibur__echo_routes__CompressRequest'
        required: true
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CompressResponse'
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
  /v1/xcalibur/echo/verify:
    post:
      tags:
      - xcalibur-echo
      summary: Verify an ECHO receipt
      description: 'Verify the integrity and signature of an ECHO receipt.


        Checks performed:

        - **signature**: Ed25519 signature over canonical JSON of all receipt fields

        (except the signature field itself) verifies correctly.

        - **token_math**: original_tokens / compressed_tokens matches compression_ratio.

        - **compressed_hash_match**: if compressed_prompt is provided, sha3_256 of it

        matches receipt.compressed_hash. This catches any tampering with the

        compressed text.

        - **kind_check**: receipt.kind is "xcalibur.echo.v1".'
      operationId: verify_receipt_v1_xcalibur_echo_verify_post
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/hivemorph__xcalibur__echo_routes__VerifyRequest'
        required: true
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/hivemorph__xcalibur__echo_routes__VerifyResponse'
        '422':
          description: Validation Error
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/HTTPValidationError'
  /v1/xcalibur/echo/health:
    get:
      tags:
      - xcalibur-echo
      summary: ECHO health check
      description: Liveness probe for the XCALIBUR ECHO primitive.
      operationId: echo_health_v1_xcalibur_echo_health_get
      responses:
        '200':
          description: Successful Response
          content:
            application/json:
              schema:
                additionalProperties: true
                type: object
                title: Response Echo Health V1 Xcalibur Echo Health Get
components:
  schemas:
    ValidationError:
      properties:
        loc:
          items:
            anyOf:
            - type: string
            - type: integer
          type: array
          title: Location
        msg:
          type: string
          title: Message
        type:
          type: string
          title: Error Type
        input:
          title: Input
        ctx:
          type: object
          title: Context
      type: object
      required:
      - loc
      - msg
      - type
      title: ValidationError
    hivemorph__xcalibur__echo_routes__VerifyResponse:
      properties:
        valid:
          type: boolean
          title: Valid
        checks:
          additionalProperties: true
          type: object
          title: Checks
      type: object
      required:
      - valid
      - checks
      title: VerifyResponse
    CompressResponse:
      properties:
        compressed_prompt:
          type: string
          title: Compressed Prompt
        receipt:
          additionalProperties: true
          type: object
          title: Receipt
      type: object
      required:
      - compressed_prompt
      - receipt
      title: CompressResponse
    hivemorph__xcalibur__echo_routes__VerifyRequest:
      properties:
        receipt:
          additionalProperties: true
          type: object
          title: Receipt
          description: The receipt object returned by /compress.
        compressed_prompt:
          anyOf:
          - type: string
          - type: 'null'
          title: Compressed Prompt
          description: If provided, verifies that sha3_256(compressed_prompt) matches receipt.compressed_hash. Also enables tamper detection.
      type: object
      required:
      - receipt
      title: VerifyRequest
    hivemorph__xcalibur__echo_routes__CompressRequest:
      properties:
        prompt:
          type: string
          title: Prompt
          description: The prompt text to compress.
        target_ratio:
          type: number
          title: Target Ratio
          description: Target length-reduction ratio in (0, 1). The compressed prompt must be at most this fraction of the original token count. Default 0.6 (≤60%% of original).
          default: 0.6
        min_preservation:
          type: number
          title: Min Preservation
          description: Minimum surrogate preservation score [0, 1]. Gradient-free mutation search keeps drops only if score stays at or above this threshold. Default 0.85.
          default: 0.85
      type: object
      required:
      - prompt
      title: CompressRequest
    HTTPValidationError:
      properties:
        detail:
          items:
            $ref: '#/components/schemas/ValidationError'
          type: array
          title: Detail
      type: object
      title: HTTPValidationError