SuperBizAgent-java/openspec/changes/archive/2026-07-04-diagnosis-eval-harness/specs/diagnosis-eval-harness/spec.md

ADDED Requirements

Requirement: Evaluation harness SHALL define fixed diagnosis cases

The system SHALL provide a small fixed set of MVP diagnosis evaluation cases with explicit expected trace and answer criteria.

Scenario: Case definition includes expected evidence

• WHEN an evaluation case is defined
• THEN it SHALL include a case id, user question, expected root-cause keywords, required evidence tools, and allowed verifier verdicts

Scenario: Case definition can express forbidden behavior

• WHEN a case has known unsafe behavior
• THEN the case definition SHALL be able to declare forbidden answer keywords or forbidden verdicts

Requirement: Evaluation harness SHALL validate diagnosis traces

The system SHALL validate a diagnosis trace against the corresponding case definition using deterministic rules.

Scenario: Evidence coverage validation

• WHEN a trace is evaluated
• THEN the evaluator SHALL verify that required evidence tools appear in toolInvocations or verifier trace summaries

Scenario: Verifier evaluation validation

• WHEN a trace is evaluated
• THEN the evaluator SHALL verify that selfEvaluation.verifier_evaluation.verdict exists
• AND the verdict SHALL be one of the case's allowed verdicts

Scenario: Answer keyword validation

• WHEN a trace is evaluated
• THEN the evaluator SHALL verify that the final answer includes at least the configured minimum root-cause keyword coverage

Scenario: Degraded output validation

• WHEN a trace verdict is REJECT
• THEN the evaluator SHALL verify that the final answer follows the degraded-output contract rather than leaking an unverified executor answer

Requirement: Evaluation harness SHALL report quality and cost signals

The system SHALL produce a report that summarizes pass/fail results and key trace metrics.

Scenario: JSON report output

• WHEN an evaluation run completes
• THEN the evaluator SHALL output a JSON report with per-case result, failed checks, verdict, evidence coverage, tool-call count, and duration

Scenario: Markdown report output

• WHEN an evaluation run completes
• THEN the evaluator SHALL output a Markdown report suitable for review in the repository

Scenario: Aggregate metrics

• WHEN multiple cases are evaluated
• THEN the report SHALL include aggregate pass rate, verdict distribution, average tool-call count, and average duration when available

Requirement: Evaluation harness SHALL support offline fixture mode

The first evaluator version SHALL be runnable without live MySQL, Redis, Milvus, or LLM services by evaluating saved trace fixtures.

Scenario: Fixture trace evaluation

• WHEN the evaluator is run against a directory of trace fixture files
• THEN it SHALL evaluate each trace file against its matching case definition
• AND it SHALL not require a running application service

Scenario: Missing fixture is reported clearly

• WHEN a case has no matching trace fixture
• THEN the evaluator SHALL mark the case as not run or failed with a clear reason