session-memory Phase 0: ingest cursor + sweep entrypoint + config (T06)

- session_memory/core/cursor.py: size/mtime change detection sidecar
- session_memory/config.toml: store paths, retention caps, per-source
  globs (claude on, codex/grok off for Phase 1), repo->domain map
- session_memory/ingest.py: discover->normalize->store->digest->evict;
  --dry-run creates/writes nothing; python -m session_memory.ingest
- tests/test_ingest.py; live dry-run parsed 84/85 real local sessions

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

tests/test_ingest.py

@@ -0,0 +1,81 @@
+"""Ingest sweep + cursor tests (T06)."""
+
+import json
+import os
+import sys
+
+sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+
+from session_memory.core.cursor import Cursors  # noqa: E402
+from session_memory.ingest import run_sweep  # noqa: E402
+
+
+def test_cursor_change_detection(tmp_path):
+    f = tmp_path / "a.jsonl"
+    f.write_text("{}\n")
+    cur = Cursors(str(tmp_path / "cur.json"))
+    assert cur.is_changed(str(f)) is True
+    cur.mark(str(f))
+    assert cur.is_changed(str(f)) is False
+    f.write_text("{}\n{}\n")  # grow
+    assert cur.is_changed(str(f)) is True
+
+
+def _claude_session_file(dir_path, native):
+    os.makedirs(dir_path, exist_ok=True)
+    p = os.path.join(dir_path, f"{native}.jsonl")
+    recs = [
+        {"type": "user", "uuid": "u1", "sessionId": native,
+         "timestamp": "2026-06-06T10:00:00Z", "cwd": "/home/worsch/agentic-resources",
+         "gitBranch": "main", "message": {"role": "user", "content": "hi"}},
+        {"type": "assistant", "uuid": "a1", "parentUuid": "u1", "sessionId": native,
+         "timestamp": "2026-06-06T10:00:02Z",
+         "message": {"role": "assistant", "model": "claude-opus-4-8",
+                     "usage": {"input_tokens": 5, "output_tokens": 2},
+                     "content": [{"type": "text", "text": "hello"}]}},
+    ]
+    with open(p, "w", encoding="utf-8") as f:
+        for r in recs:
+            f.write(json.dumps(r) + "\n")
+    return p
+
+
+def _config(tmp_path, projects_dir):
+    return {
+        "store": {
+            "db_path": str(tmp_path / ".store/mem.db"),
+            "blob_dir": str(tmp_path / ".store/blobs"),
+            "cursor": str(tmp_path / ".store/cursors.json"),
+        },
+        "retention": {"raw_soft_cap_bytes": 10**12, "raw_hard_cap_bytes": 10**12,
+                      "raw_max_age_days": 10**6, "distilled_cap_bytes": 10**12},
+        "sources": {"claude": {"enabled": True, "root": str(projects_dir), "glob": "*/*.jsonl"}},
+        "repo_domain_map": {"agentic-resources": "helix_forge"},
+    }
+
+
+def test_run_sweep_end_to_end(tmp_path):
+    projects = tmp_path / "projects"
+    _claude_session_file(str(projects / "-home-worsch-agentic-resources"), "sess-aaa")
+    cfg = _config(tmp_path, projects)
+
+    res = run_sweep(cfg)
+    assert res.discovered == 1
+    assert res.ingested == 1
+    assert res.analyzed == 1
+    assert res.retention is not None
+
+    # re-run: cursor skips the unchanged file (idempotent, cheap)
+    res2 = run_sweep(cfg)
+    assert res2.skipped_unchanged == 1
+    assert res2.ingested == 0
+
+
+def test_dry_run_writes_nothing(tmp_path):
+    projects = tmp_path / "projects"
+    _claude_session_file(str(projects / "-home-worsch-agentic-resources"), "sess-bbb")
+    cfg = _config(tmp_path, projects)
+    res = run_sweep(cfg, dry_run=True)
+    assert res.discovered == 1 and res.ingested == 1
+    assert res.retention is None
+    assert not os.path.exists(cfg["store"]["db_path"])  # no store created