Hooks build from the resolved client config

HaikuRAG resolves `config=None` to the global config for everything
else; the hook list read the raw argument, so a client constructed
without an explicit config never loaded its configured hooks.

Tests follow the config and context-expansion APIs: `get_config()`
replaces the removed `Config` instance, and the expansion test does
its own `resolve_refs_grouped` / `get_items_in_ranges` fetch now that
`expand_with_items` takes the items rather than fetching them.

haiku_rag_slim/haiku/rag/client/__init__.py

@@ -94,7 +94,9 @@ class HaikuRAG:
         self._vacuum_tasks: set[asyncio.Task] = set()
         self._last_vacuum_at: float | None = None
         self._vacuum_dirty = False
-        self._hooks = build_hooks(config.hooks, load_hooks()) if config.hooks else []
+        self._hooks = (
+            build_hooks(self._config.hooks, load_hooks()) if self._config.hooks else []
+        )
 
     @property
     def is_read_only(self) -> bool:

tests/test_hooks.py

@@ -3,7 +3,7 @@ import logging
 import pytest
 
 from haiku.rag.client import HaikuRAG
-from haiku.rag.config import Config
+from haiku.rag.config import get_config
 from haiku.rag.hooks import ENTRY_POINT_GROUP, Hook, build_hooks
 from haiku.rag.store.models.chunk import Chunk
 from tests.test_client import _docling_doc, _import
@@ -72,7 +72,7 @@ def test_build_hooks_loads_lazily_in_configured_order():
 
 
 def test_client_init_unknown_hook_raises(temp_db_path):
-    config = Config.model_copy(deep=True)
+    config = get_config().model_copy(deep=True)
     config.hooks = ["missing"]
     with pytest.raises(ValueError, match="missing"):
         HaikuRAG(temp_db_path, config=config, create=True)
@@ -90,7 +90,7 @@ def test_client_builds_hooks_from_entry_points(temp_db_path, monkeypatch):
         return [_NamedEntryPoint()]
 
     monkeypatch.setattr("haiku.rag.hooks.entry_points", fake_entry_points)
-    config = Config.model_copy(deep=True)
+    config = get_config().model_copy(deep=True)
     config.hooks = ["recording"]
     client = HaikuRAG(temp_db_path, config=config, create=True)
     assert len(client._hooks) == 1
@@ -131,7 +131,7 @@ async def test_before_search_hooks_chain_in_order(temp_db_path):
         assert captured["query"] == "alpha one two"
         assert captured["filter"] == "uri = 'mem://hooked'"
         # The request carries the resolved search parameters.
-        assert spy.requests == [("alpha one two", "hybrid", Config.search.limit)]
+        assert spy.requests == [("alpha one two", "hybrid", get_config().search.limit)]
 
 
 class SpyBeforeSearchHook(Hook):
@@ -158,7 +158,7 @@ async def test_before_search_skips_non_text_queries(temp_db_path):
         client.chunk_repository.search = fake_search
 
         async def fake_embed_image(image):
-            return [0.1] * Config.embeddings.model.vector_dim
+            return [0.1] * get_config().embeddings.model.vector_dim
 
         client.store.embedder.embed_image = fake_embed_image
         client.store.embedder.supports_images = True
@@ -193,7 +193,7 @@ async def test_after_search_transforms_results(temp_db_path):
 @pytest.mark.asyncio
 async def test_after_ingest_fires_on_import_batch_update(temp_db_path):
     spy = RecordingHook()
-    dim = Config.embeddings.model.vector_dim
+    dim = get_config().embeddings.model.vector_dim
 
     async with HaikuRAG(temp_db_path, create=True) as client:
         client._hooks = [spy]
@@ -245,7 +245,7 @@ async def test_after_ingest_fires_on_import_batch_update(temp_db_path):
 @pytest.mark.asyncio
 async def test_metadata_only_update_does_not_fire_after_ingest(temp_db_path):
     spy = RecordingHook()
-    dim = Config.embeddings.model.vector_dim
+    dim = get_config().embeddings.model.vector_dim
 
     async with HaikuRAG(temp_db_path, create=True) as client:
         client._hooks = [spy]
@@ -266,7 +266,7 @@ async def test_metadata_only_update_does_not_fire_after_ingest(temp_db_path):
 @pytest.mark.asyncio
 async def test_after_delete_fires_for_cascade(temp_db_path):
     spy = RecordingHook()
-    dim = Config.embeddings.model.vector_dim
+    dim = get_config().embeddings.model.vector_dim
 
     async with HaikuRAG(temp_db_path, create=True) as client:
         client._hooks = [spy]
@@ -328,7 +328,7 @@ def test_format_for_agent_without_annotations_has_no_notes():
 
 @pytest.mark.asyncio
 async def test_annotations_survive_context_expansion(temp_db_path):
-    from haiku.rag.context import expand_with_items
+    from haiku.rag.context import expand_with_items, window_for
     from haiku.rag.store.models.chunk import SearchResult
     from haiku.rag.store.models.document_item import DocumentItem
 
@@ -362,9 +362,16 @@ async def test_annotations_survive_context_expansion(temp_db_path):
             annotations=["RCV: receive", "shared note"],
         )
 
-        expanded = await expand_with_items(
-            client.document_item_repository, "doc-1", [r1, r2], 5000
-        )
+        repo = client.document_item_repository
+        positions = (
+            await repo.resolve_refs_grouped(
+                {"doc-1": [ref for r in (r1, r2) for ref in r.doc_item_refs]}
+            )
+        )["doc-1"]
+        window_items = (
+            await repo.get_items_in_ranges({"doc-1": window_for(positions)})
+        )["doc-1"]
+        expanded = expand_with_items([r1, r2], 5000, positions, window_items)
 
         assert len(expanded) == 1
         assert expanded[0].annotations == [
@@ -388,7 +395,7 @@ class ThrowingHook(Hook):
 @pytest.mark.asyncio
 async def test_after_ingest_hook_failure_is_logged_not_raised(temp_db_path, caplog):
     spy = RecordingHook()
-    dim = Config.embeddings.model.vector_dim
+    dim = get_config().embeddings.model.vector_dim
 
     async with HaikuRAG(temp_db_path, create=True) as client:
         client._hooks = [ThrowingHook(), spy]
@@ -416,7 +423,7 @@ async def test_after_ingest_hook_failure_is_logged_not_raised(temp_db_path, capl
 @pytest.mark.asyncio
 async def test_after_delete_hook_failure_is_logged_not_raised(temp_db_path, caplog):
     spy = RecordingHook()
-    dim = Config.embeddings.model.vector_dim
+    dim = get_config().embeddings.model.vector_dim
 
     async with HaikuRAG(temp_db_path, create=True) as client:
         doc = await client.import_document(