> ## Documentation Index > Fetch the complete documentation index at: https://docs-pos.solya.app/llms.txt > Use this file to discover all available pages before exploring further. # Set a product's markdown schedule (démarque programmée) > Upserts a product's markdown (démarque) schedule: a master base price plus ordered steps. Each step is one of two KINDS — `fixed` (the effective price BECOMES `priceCents`) or `percent` (the master less `percentOff`%, bounded 0..100). Steps must be STRICTLY ascending by `fromDate`, so the ramp is unambiguous; the latest step on-or-before now wins at resolve. The example ramps a solde: -30% from 1 Aug, then a fixed 10,00 € floor from 1 Sep. A first write lands at version 1; a later write goes through optimistic concurrency (`expectedVersion`). Requires the kernel `price:override` grant (403 without). 409s on a stale `expectedVersion`. ## OpenAPI ````yaml /openapi.json post /v1/markdowns openapi: 3.0.3 info: title: Solya POS API version: 1.0.0 description: >- The Solya POS backend HTTP surface. Every documented operation is agent-ready: it carries an `operationId`, an agent-facing `description`, the `pos.*` scopes it enforces (`x-required-permissions`) and an `x-agent-tier`. Success responses return the payload as raw JSON; failures return the `ErrorResponse` envelope (`{ error: { code, message, statusCode } }`). servers: - url: / description: The backend, relative to its deployed origin. security: [] paths: /v1/markdowns: post: tags: - Catalog summary: Set a product's markdown schedule (démarque programmée) description: >- Upserts a product's markdown (démarque) schedule: a master base price plus ordered steps. Each step is one of two KINDS — `fixed` (the effective price BECOMES `priceCents`) or `percent` (the master less `percentOff`%, bounded 0..100). Steps must be STRICTLY ascending by `fromDate`, so the ramp is unambiguous; the latest step on-or-before now wins at resolve. The example ramps a solde: -30% from 1 Aug, then a fixed 10,00 € floor from 1 Sep. A first write lands at version 1; a later write goes through optimistic concurrency (`expectedVersion`). Requires the kernel `price:override` grant (403 without). 409s on a stale `expectedVersion`. operationId: setMarkdownSchedule requestBody: required: true content: application/json: schema: type: object properties: productId: type: string minLength: 1 masterCents: type: integer minimum: 0 maximum: 9007199254740991 steps: type: array items: oneOf: - type: object properties: id: type: string minLength: 1 kind: type: string enum: - fixed fromDate: type: string format: date-time pattern: >- ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d(?::[0-5]\d(?:\.\d+)?)?(?:Z))$ priceCents: type: integer minimum: 0 maximum: 9007199254740991 required: - id - kind - fromDate - priceCents - type: object properties: id: type: string minLength: 1 kind: type: string enum: - percent fromDate: type: string format: date-time pattern: >- ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d(?::[0-5]\d(?:\.\d+)?)?(?:Z))$ percentOff: type: number minimum: 0 maximum: 100 required: - id - kind - fromDate - percentOff expectedVersion: default: 1 type: integer minimum: 0 maximum: 9007199254740991 required: - productId - masterCents - steps example: productId: prod-espresso masterCents: 3000 steps: - id: s1 kind: percent fromDate: '2026-08-01T00:00:00.000Z' percentOff: 30 - id: s2 kind: fixed fromDate: '2026-09-01T00:00:00.000Z' priceCents: 1000 responses: '201': description: The persisted schedule identity + its bumped version. content: application/json: schema: type: object properties: id: type: string description: The persisted schedule id. productId: type: string description: The product the schedule is for. version: type: integer minimum: -9007199254740991 maximum: 9007199254740991 description: The version the write landed at (bumped on update). masterCents: type: integer minimum: 0 maximum: 9007199254740991 description: The master (base) gross price in cents. stepCount: type: integer minimum: -9007199254740991 maximum: 9007199254740991 description: How many steps the persisted schedule carries. required: - id - productId - version - masterCents - stepCount additionalProperties: false description: The persisted schedule identity + its bumped version. example: id: markdown:prod-espresso productId: prod-espresso version: 1 masterCents: 3000 stepCount: 2 '400': description: >- The request failed schema validation; `error.fieldErrors` lists the fields. content: application/json: schema: $ref: '#/components/schemas/ValidationErrorResponse' '401': description: No valid credential was presented — send a bearer token. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '403': description: The actor is authenticated but lacks the required `pos.*` scope. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '409': description: >- The request conflicts with current state (duplicate id or stale version). content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '422': description: The request is well-formed but violates a domain rule. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '500': description: An unexpected server error — safe to retry idempotent requests. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' security: - bearerAuth: [] components: schemas: ValidationErrorResponse: type: object required: - error additionalProperties: false description: >- A `VALIDATION_FAILED` envelope carrying the offending fields in `fieldErrors`. properties: error: type: object required: - code - message - statusCode additionalProperties: false properties: code: type: string enum: - VALIDATION_FAILED message: type: string statusCode: type: integer fieldErrors: type: array description: >- One entry per rejected field: the field path and why it was rejected. items: type: object required: - field - message additionalProperties: false properties: field: type: string description: Dot-path of the offending field. message: type: string description: Why the field was rejected. ErrorResponse: type: object required: - error additionalProperties: false description: The uniform failure envelope every non-2xx response returns. properties: error: type: object required: - code - message - statusCode additionalProperties: false properties: code: type: string enum: - VALIDATION_FAILED - UNAUTHORIZED - FORBIDDEN - NOT_FOUND - CONFLICT - BUSINESS_RULE_VIOLATION - INTERNAL_ERROR description: >- Machine-readable kernel `ResultCode` — branch on this, not on `message`. message: type: string description: >- Human-readable explanation. Safe to surface; never leaks server internals. statusCode: type: integer description: >- The HTTP status, mirrored into the body so a client need not read headers. securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: JWT description: >- `Authorization: Bearer `. Accepts EITHER a Keycloak access token (scopes-in-token) OR an opaque POS session token; both resolve to the same `pos.*` scope vocabulary the route guards enforce. ````