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Interface: IEvaluator

Defined in: packages/agentos/src/core/evaluation/IEvaluator.ts:268

Interface for the agent evaluator.

Example​

const evaluator = new Evaluator();

// Create test suite
const testCases: EvalTestCase[] = [
  {
    id: 'greet-1',
    name: 'Basic greeting',
    input: 'Hello!',
    expectedOutput: 'Hello! How can I help you today?',
    criteria: [
      { name: 'relevance', description: 'Is greeting appropriate', weight: 0.5, scorer: 'llm_judge' },
      { name: 'politeness', description: 'Is response polite', weight: 0.5, scorer: 'contains' },
    ],
  },
];

// Run evaluation
const run = await evaluator.runEvaluation('greeting-test', testCases, agentFn);
console.log(`Pass rate: ${run.aggregateMetrics.passRate * 100}%`);

Methods​

compareRuns()​

compareRuns(runId1, runId2): Promise<EvalComparison>

Defined in: packages/agentos/src/core/evaluation/IEvaluator.ts:339

Compares two evaluation runs.

Parameters​

runId1​

string

First run ID

runId2​

string

Second run ID

Returns​

Promise<EvalComparison>

Comparison results

evaluateTestCase()​

evaluateTestCase(testCase, actualOutput, config?): Promise<EvalTestResult>

Defined in: packages/agentos/src/core/evaluation/IEvaluator.ts:291

Evaluates a single test case.

Parameters​

testCase​

EvalTestCase

The test case

actualOutput​

string

The agent's actual output

config?​

EvalConfig

Evaluation configuration

Returns​

Promise<EvalTestResult>

Test result

generateReport()​

generateReport(runId, format): Promise<string>

Defined in: packages/agentos/src/core/evaluation/IEvaluator.ts:347

Generates a report for a run.

Parameters​

runId​

string

Run ID

format​

Report format

"json" | "markdown" | "html"

Returns​

Promise<string>

Report content

getRun()​

getRun(runId): Promise<EvalRun | undefined>

Defined in: packages/agentos/src/core/evaluation/IEvaluator.ts:324

Gets an evaluation run by ID.

Parameters​

runId​

string

Run ID

Returns​

Promise<EvalRun | undefined>

The evaluation run or undefined

listRuns()​

listRuns(limit?): Promise<EvalRun[]>

Defined in: packages/agentos/src/core/evaluation/IEvaluator.ts:331

Lists recent evaluation runs.

Parameters​

limit?​

number

Maximum runs to return

Returns​

Promise<EvalRun[]>

Array of runs

registerScorer()​

registerScorer(name, fn): void

Defined in: packages/agentos/src/core/evaluation/IEvaluator.ts:317

Registers a custom scorer.

Parameters​

name​

string

Scorer name

fn​

ScorerFunction

Scoring function

Returns​

void

runEvaluation()​

runEvaluation(name, testCases, agentFn, config?): Promise<EvalRun>

Defined in: packages/agentos/src/core/evaluation/IEvaluator.ts:277

Runs an evaluation suite against an agent.

Parameters​

name​

string

Name for this evaluation run

testCases​

EvalTestCase[]

Test cases to evaluate

agentFn​

(input, context?) => Promise<string>

Function that takes input and returns agent output

config?​

EvalConfig

Evaluation configuration

Returns​

Promise<EvalRun>

The completed evaluation run

score()​

score(scorer, actual, expected?, references?): Promise<number>

Defined in: packages/agentos/src/core/evaluation/IEvaluator.ts:305

Scores output using a specific scorer.

Parameters​

scorer​

string

Scorer name

actual​

string

Actual output

expected?​

string

Expected output

references?​

string[]

Reference outputs

Returns​

Promise<number>

Score (0-1)