5.4The Reconciler: The Critical Component

The Reconciler is what makes the swarm work. Without it, you get duplicate tests, naming conflicts, and inconsistent patterns.

class Reconciler:
    def __init__(self, llm):
        self.llm = llm

    def merge(self, suites: list[RawTestSuite]) -> MergedSuite:
        """Combine all test suites into a single collection."""
        all_tests = []
        for suite in suites:
            for test in suite.tests:
                test.source_agent = suite.agent_id
                test.source_module = suite.module
                all_tests.append(test)
        return MergedSuite(tests=all_tests)

    def remove_duplicates(self, merged: MergedSuite) -> MergedSuite:
        """Remove semantically duplicate tests."""
        unique_tests = []
        seen_signatures = set()

        for test in merged.tests:
            # Generate a semantic signature for the test
            signature = self.generate_signature(test)
            if signature not in seen_signatures:
                seen_signatures.add(signature)
                unique_tests.append(test)
            else:
                # Log the duplicate for transparency
                self.log_duplicate(test, signature)

        return MergedSuite(tests=unique_tests)

    def generate_signature(self, test) -> str:
        """Generate a semantic signature for deduplication.

        Two tests are duplicates if they test the same function
        with the same input category, even if they have different names.
        """
        sig = self.llm.generate(f"""
        Summarize this test in one sentence focusing on:
        - The function being tested
        - The input category (valid, invalid, boundary, null)
        - The expected outcome

        Test code:
        {test.code}

        Example: "Tests create_user with duplicate email, expects ValueError"
        """)
        return sig.strip().lower()

    def resolve_conflicts(self, merged: MergedSuite) -> TestSuite:
        """Resolve conflicting test patterns (naming, fixtures, style)."""
        # Normalize test names to follow convention
        for test in merged.tests:
            test.name = self.normalize_name(test.name)

        # Normalize fixture usage
        fixture_map = self.build_fixture_map(merged.tests)
        for test in merged.tests:
            test.code = self.apply_fixture_map(test.code, fixture_map)

        return TestSuite(tests=merged.tests, metadata={"reconciled": True})