Vally eval suites

Vally eval suites

Skills in the azure-skills plugin are required to have integration tests that run prompts against an LLM agent to evaluate whether they help the agent accomplish goals in target scenarios. Such integration tests are written as vally eval suites, using vally as the underlying tool for running tests and grading the agent outcome.

Write vally eval suites

Vally eval suites are written as yaml documents. All eval suites share eval spec.

Refer to the official documentation on the schema of the spec and the schema of the eval suites writing-eval-specs.

Vally eval suites for azure-skills plugin have the following file layout. The shared eval spec is located at <repo-root>/.vally.yaml. The eval suites are categorized by plugin and skills. The eval suites for each skill are located at <repo-root>/evals/<plugin-dirname>/<skill-name>/*.yaml, e.g. <repo-root>/evals/azure-skills/azure-ai/eval.yaml.

Use meaningful file names to categorize tests. If a skill needs fixture files for its eval suites, it should organize such fixture files in a fixture directory under its directory, e.g. <repo-root>/evals/azure-skills/azure-ai/fixture/. The vally test runner and stimulus validation script will load all *.yaml files except for those under a fixture/ directory. Make sure to put all fixture files under the fixture/ directory.

Migrate integration tests

azure-skills plugin have implemented JavaScript integration test using Jest as the underlying test runner. All such integration tests are under tests/**/integration.test.ts files.

To migrate integration test for a skill to vally suites, create its eval suite spec at <repo-root>/evals/<plugin-dirname>/<skill-name>/eval.yaml, add a suite that runs the same prompt and uses vally's built-in graders to grade the trajectory of the agent run. If the integration test grades the agent run in a way that vally's built-in graders don't support, refer to the official documentation on how to create a custom grader writing-custom-grader.

Why is there a custom executor

The legacy Jest based integration test framework implemented features that vally doesn't support yet, such as early termination, follow up, system prompt modification, screenshot taking, etc. Besides, test-all-integration runs automated integration tests, collects its exported data and feeds the data to a dashboard web app under <repo-root>/dashboard/ to monitor skill integration test results.

If you intend to have your vally suites use any of the extended features or have their results be consumed by the dashboard, you MUST use the custom executor in your vally suites.

Use tags to control the custom executor

The custom executor uses special tag values to control the behavior of the custom executor. See tag-helpers.ts to learn what special tags are supported.

Note: If an eval suite specifies an earlyTerminate condition, the suite MUST NOT use the completed grader because early terminated runs will always fail the completed grader by design.

Validate vally eval suites

Vally eval suites in this repo follow certain conventions. For example, all eval suites must have a type, tier, cost and area tag so they can be run for a corresponding target group. To ensure all eval suites follow the conventions, a script is added to validate the eval suites and report errors when it sees any violation. To run the script, execute this command from the scripts/ directory.

# cwd as <repo-root>/scripts/
npm run vally validate-stimulus