session-memory Phase 2: curate entrypoint + README (T06)

python -m session_memory.curate: refreshes detect candidates, then drives them
through review interactively or with --auto-approve (batch, gate-driven) /
--json. Emits a catalog diff summary; queues hub decisions when offline.
[curate] config gains decision_queue + workstream id. README documents the
detect -> curate -> distribute flow and the gate knobs. 2 new tests; suite 72/72.

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

tests/test_curate_entrypoint.py

@@ -0,0 +1,81 @@
+"""Curate entrypoint tests (T06): batch auto-approve end-to-end via the store."""
+
+import os
+import sys
+
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from session_memory.core.store import Store  # noqa: E402
+from session_memory.curate.__main__ import main  # noqa: E402
+from session_memory.curate.catalog import Catalog  # noqa: E402
+
+
+def _digest(uid, flavor, repo, **markers):
+    return {
+        "session_uid": uid, "flavor": flavor, "repo": repo, "outcome": "fail",
+        "cost": {"input_tokens": 10, "output_tokens": 1},
+        "markers": {"errors": markers.get("errors", 0), "retries": markers.get("retries", 0),
+                    "test_runs": 0, "edits": 0, "human_interventions": 0},
+    }
+
+
+def _write_config(tmp_path) -> str:
+    store = tmp_path / ".store"
+    catalog = tmp_path / "catalog"
+    cfg = f"""
+[store]
+db_path = "{store / 'm.db'}"
+blob_dir = "{store / 'blobs'}"
+cursor = "{store / 'c.json'}"
+
+[curate]
+catalog_dir = "{catalog}"
+review_log = "{store / 'reviews.jsonl'}"
+decision_queue = "{store / 'decisions.queue.jsonl'}"
+
+[curate.gate]
+min_frequency = 2
+min_sessions = 2
+"""
+    path = tmp_path / "config.toml"
+    path.write_text(cfg)
+    return str(path), str(store), str(catalog)
+
+
+def test_auto_approve_promotes_cross_flavor(tmp_path, capsys):
+    cfg_path, store_dir, catalog_dir = _write_config(tmp_path)
+    st = Store(os.path.join(store_dir, "m.db"), os.path.join(store_dir, "blobs"))
+    st.write_digest("claude:a", _digest("claude:a", "claude", "r1", retries=5))
+    st.write_digest("codex:b", _digest("codex:b", "codex", "r2", retries=4))
+    st.close()
+
+    rc = main(["--config", cfg_path, "--auto-approve"])
+    assert rc == 0
+
+    cat = Catalog(catalog_dir)
+    patterns = cat.list()
+    assert len(patterns) == 1
+    assert patterns[0].polarity == "problem"
+    # clears the promote floor (freq>=2) but below the default distribution
+    # floor (freq>=3) -> promoted as provisional, not distribution-ready
+    assert patterns[0].status == "provisional"
+    assert patterns[0].distribution_ready is False
+
+    out = capsys.readouterr().out
+    assert "Curate summary" in out
+    # hub offline in tests -> decision queued
+    assert "decisions queued" in out
+
+
+def test_rerun_is_idempotent(tmp_path):
+    cfg_path, store_dir, catalog_dir = _write_config(tmp_path)
+    st = Store(os.path.join(store_dir, "m.db"), os.path.join(store_dir, "blobs"))
+    st.write_digest("claude:a", _digest("claude:a", "claude", "r1", retries=5))
+    st.write_digest("codex:b", _digest("codex:b", "codex", "r2", retries=4))
+    st.close()
+
+    main(["--config", cfg_path, "--auto-approve"])
+    main(["--config", cfg_path, "--auto-approve"])  # second pass: already decided
+    cat = Catalog(catalog_dir)
+    assert len(cat.list()) == 1
+    assert cat.load(cat.list()[0].id).version == "1.0.0"  # no spurious bump