---
title: "Create Optimization Run"
method: POST
path: "/api/v1/optimization/runs"
tags: ["optimization"]
---

# Create Optimization Run

`POST /api/v1/optimization/runs`

Create a non-blocking prompt optimization run.

Returns immediately with the run_id.  The optimization executes as a
background task.  Poll ``GET /runs/{run_id}`` for progress and results.

## Request body

- GEPAOptimizationRequest — Request body for triggering a GEPA prompt optimization run.
  - `dataset_path` string, nullable — Relative filesystem path to the dataset file.
  - `dataset_id` string, nullable — Registered dataset identifier to optimize against.
  - `program_spec` string — DSPy program specification string to optimize in module:attr form. Required when module_slug is not provided.
  - `module_slug` string, nullable — Registered module slug for server-side dispatch. When provided, program_spec is auto-resolved from the module registry.
  - `skill_name` string, nullable — Bundled or mounted Fleet skill name to optimize as a markdown skill artifact.
  - `skill_path` string, nullable — Relative path to a SKILL.md-compatible markdown file to optimize.
  - `trace_bundle_paths` string[] — Optional offline trace bundle paths available to the RLM-GEPA instruction proposer.
  - `reflection_profile_id` string, nullable — Optional LLM provider profile id for the GEPA proposer/reflection model.
  - `reflection_model_id` string, nullable — Optional provider-native model id for the GEPA proposer/reflection model.
  - `output_path` string, nullable — Optional filesystem path to save the optimized program.
  - `auto` 'light' | 'medium' | 'heavy' — Optimization intensity level.
  - `max_metric_calls` integer, nullable — Optional GEPA metric-call budget override for short offline smoke runs.
  - `train_ratio` number — Fraction of examples to use for training (remainder used for validation).
  - `optimizer` 'gepa' — Optimizer backend to use. GEPA is the only supported optimizer.

## Response `200`

Successful Response

- OptimizationRunCreatedResponse — Response when an async optimization run is created.
  - `run_id` string, required — Unique identifier for the created run.
  - `status` string — Initial run status.

## Other responses

- `400` — Invalid optimization parameters.
- `401` — Authentication is required or the provided token is invalid.
- `422` — Validation Error
- `503` — GEPA optimization is unavailable in this environment.

## Changes

- **2026-06-12** `4a415e33915a` — 3 breaking, 6 info
  - the `optimizer` request property const value `gepa` was added
  - removed the enum value `gepa` of the request property `optimizer`
  - removed the enum value `miprov2` of the request property `optimizer`
  - added the new optional request property `max_metric_calls`
  - …5 more
- **2026-06-11** `604ec78205fc` — 1 info
  - added the new optional request property `optimizer`
- **2026-05-23** `6178f925cdec` — 1 breaking, 3 info
  - the `detail` response's property type/format changed from `array`/`` to ``/`` for status `422`
  - added `subschema #1, subschema #2` to the `detail` response property `anyOf` list for the response status `422`
  - added the required property `code` to the response with the `422` status
  - added the required property `message` to the response with the `422` status
- **2026-04-18** `1f45411d7556` — 3 breaking
  - request property `dataset_id` list-of-types was narrowed by removing types `integer` from media type `application/json`
  - the `dataset_id/anyOf[subschema #1]/` request property type/format changed from `integer`/`` to `string`/``
  - the `run_id` response's property type/format changed from `integer`/`` to `string`/`` for status `200`
- …earlier changes not shown

[Full history](https://skmtc.dev/qredence/apis/fleet-rlm/changes/api/v1/optimization/runs/post.md)

---

[API](https://skmtc.dev/qredence/apis/fleet-rlm.md) · [All operations](https://skmtc.dev/qredence/apis/fleet-rlm/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/qredence/fleet-rlm/revisions/e25aaded81b9/schema)