Genkit Evaluators Plugin
Provides three rule-based evaluators matching the Go and JS implementations:
- regex – Tests output against a regex pattern (reference = regex string)
- deep_equal – Tests equality of output against reference
- jsonata – Evaluates a JSONata expression (reference) against output; pass if result is truthy
No LLM or API keys required.
Installation
uv add genkit-evaluators
Usage
from genkit import Genkit
from genkit.evaluator import BaseDataPoint
from genkit_evaluators import register_genkit_evaluators
ai = Genkit()
register_genkit_evaluators(ai)
results = await ai.evaluate(
evaluator='genkitEval/regex',
dataset=[
BaseDataPoint(input='sample', output='banana', reference='ba?a?a'),
BaseDataPoint(input='sample', output='apple', reference='ba?a?a'),
],
)
Or from the CLI:
genkit eval:run datasets/example.json --evaluators=genkitEval/regex
Evaluators
- genkitEval/regex – Reference is a regex string. Output (stringified if needed) must match.
- genkitEval/deep_equal – Reference is the expected value. Output must equal reference.
- genkitEval/jsonata – Reference is a JSONata expression. Evaluated against output; pass if truthy.
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