Load the test schema once and truncate data between files.

Co-authored-by: Cursor <cursoragent@cursor.com>

.gitea/workflows/test.yml

@@ -59,7 +59,7 @@ jobs:
               export KANSHO_PROVIDER_KEY=
               export KANSHO_DETECT_PROVIDER_KEY=
               pip install -q -r requirements-dev.txt
-              python -m pytest tests -m "not slow" -ra -vv --tb=short
+              python -m pytest tests -m "not slow" -ra --tb=short
             '
 
   smoke-dev:

backend/db.py

@@ -555,16 +555,21 @@ def _seed_runtime(conn: Any) -> None:
     seed_generation_instructions(conn)
 
 
-def init_db() -> None:
-    if use_postgres():
-        from db_init import ensure_postgres_ready
-
-        ensure_postgres_ready()
+def refresh_runtime_seed() -> None:
+    """Re-seed catalog rows after a data truncate. Schema must already exist."""
     with get_db() as conn:
         _seed_runtime(conn)
     from writing_profile_store import bootstrap_from_existing
 
     bootstrap_from_existing()
+
+
+def init_db() -> None:
+    if use_postgres():
+        from db_init import ensure_postgres_ready
+
+        ensure_postgres_ready()
+        refresh_runtime_seed()
         return
 
     schema = SCHEMA_PATH.read_text(encoding="utf-8")

backend/db_init.py

@@ -36,6 +36,13 @@ SQLITE_HISTORY_MIGRATIONS = (
     "021_voice_legacy_immutable",
 )
 _LEADING_DIGITS = re.compile(r"^(\d{3})_.*\.sql$")
+_schema_ready = False
+
+
+def mark_schema_dirty() -> None:
+    """Call after DROP SCHEMA so the next init_db reloads schema.sql."""
+    global _schema_ready
+    _schema_ready = False
 
 
 def _connect_raw():
@@ -137,13 +144,17 @@ def apply_schema_and_migrations() -> None:
 
 
 def ensure_postgres_ready() -> None:
+    global _schema_ready
     if not use_postgres():
         return
+    if _schema_ready:
+        return
     wait_for_postgres()
     try:
         apply_schema_and_migrations()
     except Exception:
         sys.exit(1)
+    _schema_ready = True
 
 
 def main() -> None:

backend/tests/conftest.py

@@ -1,9 +1,9 @@
 """pytest runner for the existing test_*.py scripts.
 
 Each file stays one case (`main()`) until it is split into native pytest
-functions. Integration files reset `kansho_test` only; `kansho_dev` is never
-the test target. Provider keys and fake flags are restored per file so the
-shared pytest process matches the old one-script-per-process isolation.
+functions. Schema is loaded once per session; each integration file only
+truncates data so kansho_dev is never the target and CI does not reload
+schema.sql twenty times.
 """
 from __future__ import annotations
 
@@ -21,6 +21,7 @@ from tests.harness import (  # noqa: E402
     apply_module_env,
     is_postgres_test_database,
     prepare_test_env,
+    reset_postgres_data,
     reset_postgres_schema,
 )
 
@@ -64,16 +65,8 @@ class KanshoScriptModule(pytest.Module):
         yield pytest.Function.from_parent(self, name="test_main", callobj=main)
 
 
-@pytest.fixture(scope="module", autouse=True)
-def _module_backend(request: pytest.FixtureRequest):
-    source = Path(str(request.path))
-    stem = source.stem
-    saved = dict(os.environ)
-    try:
-        apply_module_env(source)
-        if stem in UNIT_MODULES:
-            yield
-            return
+@pytest.fixture(scope="session")
+def _session_postgres():
     if not is_postgres_test_database():
         pytest.skip(
             "integration requires KANSHO_DB_BACKEND=postgres and DB_NAME ending _test "
@@ -84,6 +77,21 @@ def _module_backend(request: pytest.FixtureRequest):
 
     init_db()
     yield
+
+
+@pytest.fixture(scope="module", autouse=True)
+def _module_backend(request: pytest.FixtureRequest):
+    source = Path(str(request.path))
+    stem = source.stem
+    saved = dict(os.environ)
+    try:
+        apply_module_env(source)
+        if stem in UNIT_MODULES:
+            yield
+            return
+        request.getfixturevalue("_session_postgres")
+        reset_postgres_data()
+        yield
     finally:
         os.environ.clear()
         os.environ.update(saved)

backend/tests/harness.py

@@ -89,6 +89,7 @@ def _require_test_database() -> None:
 def reset_postgres_schema() -> None:
     import psycopg
 
+    from db_init import mark_schema_dirty
     from sql_compat import postgres_connect_kwargs
 
     kwargs = postgres_connect_kwargs()
@@ -103,6 +104,36 @@ def reset_postgres_schema() -> None:
         conn.execute("GRANT ALL ON SCHEMA public TO CURRENT_USER")
     finally:
         conn.close()
+    mark_schema_dirty()
+
+
+def reset_postgres_data() -> None:
+    """Clear rows on kansho_test without reloading schema.sql."""
+    import psycopg
+
+    from sql_compat import postgres_connect_kwargs
+
+    kwargs = postgres_connect_kwargs()
+    if "conninfo" in kwargs:
+        conn = psycopg.connect(kwargs["conninfo"], autocommit=True)
+    else:
+        conn = psycopg.connect(autocommit=True, **kwargs)
+    try:
+        rows = conn.execute(
+            """
+            SELECT tablename FROM pg_tables
+            WHERE schemaname = 'public' AND tablename <> 'schema_migrations'
+            """
+        ).fetchall()
+        names = [row[0] for row in rows]
+        if names:
+            joined = ", ".join('"' + name.replace('"', '""') + '"' for name in names)
+            conn.execute(f"TRUNCATE TABLE {joined} RESTART IDENTITY CASCADE")
+    finally:
+        conn.close()
+    from db import refresh_runtime_seed
+
+    refresh_runtime_seed()
 
 
 def configure_test_engine() -> None:

backend/tests/test_journal_style_context.py

@@ -209,10 +209,9 @@ def main() -> None:
     test_compile_flags()
     test_budget_omission_in_effective_trace()
 
-    from tests.harness import reset_postgres_schema
+    from tests.harness import reset_postgres_data
 
-    reset_postgres_schema()
-    init_db()
+    reset_postgres_data()
     reset_debug()
     with TestClient(app) as client:
         setup = client.post(

backend/tests/test_journal_style_legacy_immutable.py

@@ -268,10 +268,9 @@ def test_later_semantic_seed_creates_successor() -> None:
 
 
 def test_legacy_generate_trace_and_prompt() -> None:
-    from tests.harness import reset_postgres_schema
+    from tests.harness import reset_postgres_data
 
-    reset_postgres_schema()
-    init_db()
+    reset_postgres_data()
     client = TestClient(app)
     setup = client.post(
         "/api/auth/setup",

docs/architecture/technical/mvp_implementation.md

@@ -227,7 +227,7 @@ Gateway-Verfahren und offener Security Layer: `privacy_gateway.md` §9.1–9.2 u
 
 Tests beweisen API-Verträge und Invarianten, nicht Dialogqualität.
 
-**Additiv 2026-09-07:** pytest ist der Backend-Runner (`backend/pytest.ini`). Gitea führt `python -m pytest tests -m "not slow"` nach erfolgreichem Dev-Deploy auf `kansho_test` aus. `scripts/test-mvp.ps1` wrappt denselben Aufruf lokal. Unit-Marker laufen ohne Postgres; Integration nie gegen `kansho_dev`.
+**Additiv 2026-09-07:** pytest ist der Backend-Runner (`backend/pytest.ini`). Gitea führt `python -m pytest tests -m "not slow"` nach erfolgreichem Dev-Deploy auf `kansho_test` aus. `scripts/test-mvp.ps1` wrappt denselben Aufruf lokal. Unit-Marker laufen ohne Postgres; Integration nie gegen `kansho_dev`. Schema einmal pro Lauf, dazwischen nur Daten-Truncate — nicht 22× `schema.sql`.
 
 ---