fix: add missing output sockes to LLM evaluators

[anakin87]

Related Issues

I noticed that these evaluators were missing output sockets, so for example the following Pipeline would have failed at connection:

from haystack import Pipeline, component
from haystack.components.evaluators import ContextRelevanceEvaluator


@component
class ScoreReporter:
    @component.output_types(report=str)
    def run(self, individual_scores: list[float]):
        return {"report": f"received scores: {individual_scores}"}


pipeline = Pipeline()
pipeline.add_component("evaluator", ContextRelevanceEvaluator())
pipeline.add_component("reporter", ScoreReporter())

pipeline.connect("evaluator.individual_scores", "reporter.individual_scores")
# PipelineConnectError, 'evaluator.individual_scores' does not exist.

Proposed Changes:

• add the missing output sockets and minimally test them

How did you test it?

CI

Checklist

• I have read the contributors guidelines and the code of conduct.
• I have updated the related issue with new insights and changes.
• I have added unit tests and updated the docstrings.
• I've used one of the conventional commit types for my PR title: fix:, feat:, build:, chore:, ci:, docs:, style:, refactor:, perf:, test: and added ! in case the PR includes breaking changes.
• I have documented my code.
• I have added a release note file, following the contributors guidelines.
• I have run pre-commit hooks and fixed any issue.

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Project	Deployment	Actions	Updated (UTC)
haystack-docs	Ready	Preview, Comment	Jul 17, 2026 1:28pm

[github-actions]

Coverage report

Click to see where and how coverage changed

File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
haystack/components/evaluators
context_relevance.py
faithfulness.py
llm_evaluator.py
haystack/core/pipeline
pipeline.py
Project Total

This report was generated by python-coverage-comment-action

[sjrl]

Thanks!