session-memory Phase 2: versioned Pattern Catalog store (T02)

Files-first catalog (one JSON per pattern, id = source-key). Single
idempotent upsert path: added / unchanged / updated (status-only, no bump) /
versioned (content change bumps semver + archives prior to <id>.history.jsonl).
Dedup is structural on pattern id. 5 new tests; suite 52/52 green.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/test_curate_catalog.py

@@ -0,0 +1,86 @@
+"""Versioned Pattern Catalog tests (T02): round-trip, dedup, idempotent upsert."""
+
+import os
+import sys
+
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from session_memory.curate.catalog import (  # noqa: E402
+    ADDED,
+    UNCHANGED,
+    UPDATED,
+    VERSIONED,
+    Catalog,
+)
+from session_memory.curate.schema import (  # noqa: E402
+    Provenance,
+    Resolution,
+    Scope,
+    SolutionPattern,
+)
+
+
+def _pattern(src="success:clean_pass:outcome", problem="ran tests, clean finish"):
+    return SolutionPattern(
+        id=SolutionPattern.make_id(src),
+        name="Run tests before declaring success",
+        version="1.0.0",
+        polarity="success",
+        problem=problem,
+        resolutions=[Resolution(summary="run the suite")],
+        scope=Scope(flavors=["claude", "grok"]),
+        provenance=Provenance(source_key=src, evidence={"frequency": 18}),
+    )
+
+
+def test_add_then_load_round_trips(tmp_path):
+    cat = Catalog(str(tmp_path))
+    assert cat.upsert(_pattern()) == ADDED
+    loaded = cat.load(SolutionPattern.make_id("success:clean_pass:outcome"))
+    assert loaded is not None
+    assert loaded.problem == "ran tests, clean finish"
+    assert loaded.created_at and loaded.updated_at
+    assert [p.id for p in cat.list()] == [loaded.id]
+
+
+def test_resave_identical_is_noop(tmp_path):
+    cat = Catalog(str(tmp_path))
+    cat.upsert(_pattern())
+    assert cat.upsert(_pattern()) == UNCHANGED
+    # version not bumped, no history written
+    assert cat.load(_pattern().id).version == "1.0.0"
+    assert cat.history(_pattern().id) == []
+
+
+def test_dedup_on_source_key(tmp_path):
+    cat = Catalog(str(tmp_path))
+    cat.upsert(_pattern())
+    cat.upsert(_pattern())  # same source key -> same id -> one file
+    assert len(cat.list()) == 1
+
+
+def test_content_change_bumps_version_and_archives(tmp_path):
+    cat = Catalog(str(tmp_path))
+    cat.upsert(_pattern())
+    assert cat.upsert(_pattern(problem="now with more nuance")) == VERSIONED
+    current = cat.load(_pattern().id)
+    assert current.version == "1.0.1"
+    assert current.problem == "now with more nuance"
+    hist = cat.history(_pattern().id)
+    assert len(hist) == 1
+    assert hist[0]["version"] == "1.0.0"
+    assert hist[0]["status"] == "superseded"
+
+
+def test_status_only_change_updates_without_bump(tmp_path):
+    cat = Catalog(str(tmp_path))
+    cat.upsert(_pattern())
+    p = _pattern()
+    p.status = "approved"
+    p.distribution_ready = True
+    assert cat.upsert(p) == UPDATED
+    current = cat.load(p.id)
+    assert current.status == "approved"
+    assert current.distribution_ready is True
+    assert current.version == "1.0.0"  # metadata change, no bump
+    assert cat.history(p.id) == []