diff --git a/tests/test_v27_cards.py b/tests/test_v27_cards.py
new file mode 100644
index 0000000..b5edfdd
--- /dev/null
+++ b/tests/test_v27_cards.py
@@ -0,0 +1,426 @@
+"""v2.7 测试：Card CRUD + 三级层次结构 + Registry 改造"""
+
+import json
+from pathlib import Path
+
+import pytest
+
+from src.blackboard.db import init_db, get_connection
+from src.blackboard.models import Task, Card
+from src.blackboard.operations import Blackboard, CardOps
+from src.blackboard.queries import Queries
+from src.blackboard.registry import ProjectRegistry
+
+
+# ===================================================================
+# Fixtures
+# ===================================================================
+
+@pytest.fixture
+def db_path(tmp_path):
+    p = tmp_path / "test.db"
+    init_db(p)
+    return p
+
+
+@pytest.fixture
+def bb(db_path):
+    return Blackboard(db_path)
+
+
+@pytest.fixture
+def card_ops(db_path):
+    return CardOps(db_path)
+
+
+@pytest.fixture
+def registry(tmp_path):
+    return ProjectRegistry(tmp_path)
+
+
+# ===================================================================
+# Card 模型
+# ===================================================================
+
+class TestCardModel:
+    def test_card_defaults(self):
+        c = Card(id="c1", name="Test Card")
+        assert c.status == "active"
+        assert c.card_type == "default"
+        assert c.stages_json == "[]"
+        assert c.labels_json == "[]"
+
+    def test_card_from_row(self, card_ops):
+        card_ops.create_card(Card(id="c1", name="Test"))
+        c = card_ops.get_card("c1")
+        assert c is not None
+        assert c.name == "Test"
+        assert c.status == "active"
+
+
+# ===================================================================
+# CardOps CRUD
+# ===================================================================
+
+class TestCardOps:
+    def test_create_card(self, card_ops):
+        card = Card(id="c1", name="动量策略v1", card_type="strategy",
+                    stages_json=json.dumps([
+                        {"id": "research", "name": "因子研究"},
+                        {"id": "coding", "name": "策略编码"},
+                    ]))
+        result = card_ops.create_card(card)
+        assert result.id == "c1"
+        assert result.name == "动量策略v1"
+
+    def test_get_card(self, card_ops):
+        card_ops.create_card(Card(id="c1", name="Test"))
+        c = card_ops.get_card("c1")
+        assert c is not None
+        assert c.name == "Test"
+
+    def test_get_nonexistent_card(self, card_ops):
+        assert card_ops.get_card("nope") is None
+
+    def test_list_cards(self, card_ops):
+        card_ops.create_card(Card(id="c1", name="A"))
+        card_ops.create_card(Card(id="c2", name="B"))
+        cards = card_ops.list_cards()
+        assert len(cards) == 3  # default + c1 + c2
+
+    def test_list_cards_by_status(self, card_ops):
+        card_ops.create_card(Card(id="c1", name="A"))
+        card_ops.create_card(Card(id="c2", name="B"))
+        card_ops.update_card("c2", status="archived")
+        active = card_ops.list_cards(status="active")
+        assert len(active) == 2  # default + c1
+
+    def test_update_card(self, card_ops):
+        card_ops.create_card(Card(id="c1", name="Old"))
+        assert card_ops.update_card("c1", name="New", description="Updated")
+        c = card_ops.get_card("c1")
+        assert c.name == "New"
+        assert c.description == "Updated"
+
+    def test_update_card_stages(self, card_ops):
+        card_ops.create_card(Card(id="c1", name="Test"))
+        new_stages = json.dumps([{"id": "s1", "name": "Stage 1"}])
+        card_ops.update_card("c1", stages_json=new_stages)
+        c = card_ops.get_card("c1")
+        assert json.loads(c.stages_json) == [{"id": "s1", "name": "Stage 1"}]
+
+    def test_archive_card(self, card_ops):
+        card_ops.create_card(Card(id="c1", name="Test"))
+        card_ops.update_card("c1", status="archived")
+        c = card_ops.get_card("c1")
+        assert c.status == "archived"
+
+    def test_delete_card(self, card_ops):
+        card_ops.create_card(Card(id="c1", name="Test"))
+        # 只能删除 archived/deleted 状态的
+        assert not card_ops.delete_card("c1")
+        card_ops.update_card("c1", status="archived")
+        assert card_ops.delete_card("c1")
+        assert card_ops.get_card("c1") is None
+
+    def test_fork_card(self, card_ops):
+        card_ops.create_card(Card(
+            id="c1", name="Strategy v1", card_type="strategy",
+            stages_json=json.dumps([{"id": "s1", "name": "Research"}]),
+        ))
+        forked = card_ops.fork_card("c1", "c2", "Strategy v2")
+        assert forked is not None
+        assert forked.id == "c2"
+        assert forked.name == "Strategy v2"
+        assert forked.card_type == "strategy"
+        assert json.loads(forked.stages_json) == [{"id": "s1", "name": "Research"}]
+
+    def test_fork_nonexistent(self, card_ops):
+        assert card_ops.fork_card("nope", "c2", "New") is None
+
+
+# ===================================================================
+# Card 状态聚合
+# ===================================================================
+
+class TestCardStatusAggregation:
+    def test_empty_card_is_active(self, card_ops, bb):
+        card_ops.create_card(Card(id="c1", name="Empty"))
+        status = card_ops.compute_card_status("c1")
+        assert status == "active"
+
+    def test_all_pending(self, card_ops, bb):
+        card_ops.create_card(Card(id="c1", name="Test"))
+        bb.create_task(Task(id="t1", title="T1", card_id="c1"))
+        bb.create_task(Task(id="t2", title="T2", card_id="c1"))
+        status = card_ops.compute_card_status("c1")
+        assert status == "pending"
+
+    def test_has_working(self, card_ops, bb):
+        card_ops.create_card(Card(id="c1", name="Test"))
+        bb.create_task(Task(id="t1", title="T1", card_id="c1"))
+        bb.update_task_status("t1", "claimed", agent="test")
+        bb.update_task_status("t1", "working", agent="test")
+        status = card_ops.compute_card_status("c1")
+        assert status == "working"
+
+    def test_has_review(self, card_ops, bb):
+        card_ops.create_card(Card(id="c1", name="Test"))
+        bb.create_task(Task(id="t1", title="T1", card_id="c1"))
+        bb.update_task_status("t1", "claimed", agent="test")
+        bb.update_task_status("t1", "working", agent="test")
+        bb.update_task_status("t1", "review", agent="test")
+        status = card_ops.compute_card_status("c1")
+        assert status == "review"
+
+    def test_all_done(self, card_ops, bb):
+        card_ops.create_card(Card(id="c1", name="Test"))
+        bb.create_task(Task(id="t1", title="T1", card_id="c1"))
+        bb.update_task_status("t1", "claimed", agent="test")
+        bb.update_task_status("t1", "working", agent="test")
+        bb.update_task_status("t1", "review", agent="test")
+        bb.update_task_status("t1", "done", agent="test")
+        status = card_ops.compute_card_status("c1")
+        assert status == "done"
+
+    def test_cancelled_not_in_aggregation(self, card_ops, bb):
+        """cancelled Task 不参与聚合"""
+        card_ops.create_card(Card(id="c1", name="Test"))
+        bb.create_task(Task(id="t1", title="T1", card_id="c1"))
+        bb.update_task_status("t1", "cancelled", agent="test")
+        status = card_ops.compute_card_status("c1")
+        assert status == "active"  # 空（cancelled 排除）→ active
+
+    def test_manual_status_not_overridden(self, card_ops, bb):
+        """手动状态（archived）不参与聚合"""
+        card_ops.create_card(Card(id="c1", name="Test"))
+        card_ops.update_card("c1", status="archived")
+        bb.create_task(Task(id="t1", title="T1", card_id="c1"))
+        bb.update_task_status("t1", "claimed", agent="test")
+        bb.update_task_status("t1", "working", agent="test")
+        status = card_ops.compute_card_status("c1")
+        assert status == "archived"
+
+    def test_refresh_card_status(self, card_ops, bb):
+        card_ops.create_card(Card(id="c1", name="Test"))
+        bb.create_task(Task(id="t1", title="T1", card_id="c1"))
+        bb.update_task_status("t1", "claimed", agent="test")
+        bb.update_task_status("t1", "working", agent="test")
+        new_status = card_ops.refresh_card_status("c1")
+        assert new_status == "working"
+        c = card_ops.get_card("c1")
+        assert c.status == "working"
+
+
+# ===================================================================
+# Card 进度
+# ===================================================================
+
+class TestCardProgress:
+    def test_empty_card_progress(self, card_ops):
+        card_ops.create_card(Card(id="c1", name="Test"))
+        progress = card_ops.card_progress("c1")
+        assert progress["total_tasks"] == 0
+        assert progress["progress_pct"] == 0
+
+    def test_card_progress_with_stages(self, card_ops, bb):
+        stages = [
+            {"id": "research", "name": "因子研究"},
+            {"id": "coding", "name": "策略编码"},
+        ]
+        card_ops.create_card(Card(
+            id="c1", name="Test",
+            stages_json=json.dumps(stages),
+        ))
+        # 2 个 research task，1 done
+        bb.create_task(Task(id="t1", title="T1", card_id="c1", stage="research"))
+        bb.create_task(Task(id="t2", title="T2", card_id="c1", stage="research"))
+        bb.update_task_status("t1", "claimed", agent="test")
+        bb.update_task_status("t1", "working", agent="test")
+        bb.update_task_status("t1", "review", agent="test")
+        bb.update_task_status("t1", "done", agent="test")
+
+        progress = card_ops.card_progress("c1")
+        assert progress["total_tasks"] == 2
+        assert progress["done_tasks"] == 1
+        assert progress["progress_pct"] == 50
+
+        # Stage progress
+        stages_prog = progress["stages"]
+        research_stage = next(s for s in stages_prog if s["id"] == "research")
+        assert research_stage["total"] == 2
+        assert research_stage["done"] == 1
+
+
+# ===================================================================
+# Task card_id / stage
+# ===================================================================
+
+class TestTaskCardId:
+    def test_task_default_card_id(self, bb):
+        bb.create_task(Task(id="t1", title="T1"))
+        t = bb.get_task("t1")
+        # 默认 card_id 由 DB DEFAULT 设为 'default'
+        # 但 Task model 初始为 None，from_row 读 DB 的值
+        assert t.card_id == "default"
+
+    def test_task_with_card_id(self, bb):
+        bb.create_task(Task(id="t1", title="T1", card_id="c1"))
+        t = bb.get_task("t1")
+        assert t.card_id == "c1"
+
+    def test_task_with_stage(self, bb):
+        bb.create_task(Task(id="t1", title="T1", card_id="c1", stage="research"))
+        t = bb.get_task("t1")
+        assert t.stage == "research"
+
+    def test_list_tasks_by_card(self, bb):
+        bb.create_task(Task(id="t1", title="T1", card_id="c1"))
+        bb.create_task(Task(id="t2", title="T2", card_id="c2"))
+        bb.create_task(Task(id="t3", title="T3", card_id="c1"))
+        tasks = bb.list_tasks(card_id="c1")
+        assert len(tasks) == 2
+        assert all(t.card_id == "c1" for t in tasks)
+
+
+# ===================================================================
+# Registry 改造
+# ===================================================================
+
+class TestRegistryV2:
+    def test_create_project_sqlite(self, registry):
+        info = registry.create_project("p1", "Project 1",
+                                       agents=["a1", "a2"])
+        assert info["name"] == "Project 1"
+        assert info["agents"] == ["a1", "a2"]
+        assert info["status"] == "active"
+
+    def test_registry_persists(self, tmp_path):
+        r1 = ProjectRegistry(tmp_path)
+        r1.create_project("p1", "P1")
+        r2 = ProjectRegistry(tmp_path)
+        assert r2.get_project("p1") is not None
+
+    def test_auto_discover(self, tmp_path):
+        # 创建含 blackboard.db 的目录
+        (tmp_path / "discovered-proj").mkdir()
+        init_db(tmp_path / "discovered-proj" / "blackboard.db")
+
+        registry = ProjectRegistry(tmp_path)
+        found = registry.discover_projects()
+        assert "discovered-proj" in found
+        info = registry.get_project("discovered-proj")
+        assert info["source"] == "auto_discovered"
+
+    def test_auto_discover_skips_no_db(self, tmp_path):
+        (tmp_path / "empty-dir").mkdir()
+        registry = ProjectRegistry(tmp_path)
+        found = registry.discover_projects()
+        assert "empty-dir" not in found
+
+    def test_auto_discover_skips_special(self, tmp_path):
+        (tmp_path / "_internal").mkdir()
+        (tmp_path / "_internal" / "blackboard.db").touch()
+        registry = ProjectRegistry(tmp_path)
+        found = registry.discover_projects()
+        assert "_internal" not in found
+
+    def test_archive_no_move(self, tmp_path):
+        registry = ProjectRegistry(tmp_path)
+        registry.create_project("p1", "P1")
+        # 创建目录和文件
+        (tmp_path / "p1" / "test.txt").write_text("data")
+        registry.archive_project("p1")
+        # 目录仍然存在
+        assert (tmp_path / "p1").exists()
+        assert (tmp_path / "p1" / "test.txt").exists()
+        # 状态改为 archived
+        info = registry.get_project("p1")
+        assert info["status"] == "archived"
+
+    def test_migrate_from_yaml(self, tmp_path):
+        import yaml
+        yaml_path = tmp_path / "_registry.yaml"
+        with open(yaml_path, "w") as f:
+            yaml.dump({
+                "projects": {
+                    "yaml-proj": {
+                        "name": "YAML Project",
+                        "description": "From YAML",
+                        "status": "active",
+                        "agents": ["a1"],
+                    }
+                }
+            }, f)
+
+        registry = ProjectRegistry(tmp_path)
+        count = registry.migrate_from_yaml(yaml_path)
+        assert count == 1
+        info = registry.get_project("yaml-proj")
+        assert info is not None
+        assert info["name"] == "YAML Project"
+
+
+# ===================================================================
+# v2.7 迁移
+# ===================================================================
+
+class TestV27Migration:
+    def test_migrate_adds_card_id(self, tmp_path):
+        """旧 DB 迁移后所有 task 有 card_id"""
+        db_path = tmp_path / "old.db"
+        conn = get_connection(db_path)
+        try:
+            # 先 init（创建旧版表）
+            from src.blackboard.db import _SCHEMA_STATEMENTS
+            for stmt in _SCHEMA_STATEMENTS:
+                try:
+                    conn.execute(stmt)
+                except Exception:
+                    pass
+            conn.commit()
+
+            # 插入旧版 task（无 card_id）
+            conn.execute(
+                "INSERT INTO tasks (id, title, status) VALUES ('t1', 'Old Task', 'pending')"
+            )
+            conn.commit()
+        finally:
+            conn.close()
+
+        # init_db 触发迁移
+        init_db(db_path)
+
+        # 验证 card_id 已回填
+        conn = get_connection(db_path)
+        try:
+            row = conn.execute("SELECT card_id FROM tasks WHERE id='t1'").fetchone()
+            assert row["card_id"] == "default"
+
+            # 验证 default Card 存在
+            card = conn.execute("SELECT * FROM cards WHERE id='default'").fetchone()
+            assert card is not None
+            assert card["name"] == "Default"
+        finally:
+            conn.close()
+
+    def test_new_db_has_card_id(self, tmp_path):
+        """新 DB 直接包含 card_id 和 stage"""
+        db_path = tmp_path / "new.db"
+        init_db(db_path)
+
+        conn = get_connection(db_path)
+        try:
+            # tasks 表有 card_id 和 stage
+            cols = [r[1] for r in conn.execute("PRAGMA table_info(tasks)").fetchall()]
+            assert "card_id" in cols
+            assert "stage" in cols
+
+            # cards 表存在
+            cols = [r[1] for r in conn.execute("PRAGMA table_info(cards)").fetchall()]
+            assert "id" in cols
+            assert "name" in cols
+            assert "status" in cols
+            assert "stages_json" in cols
+        finally:
+            conn.close()