diff --git a/docs/agent-runner-pluginization/HOST_SDK_INFRASTRUCTURE.md b/docs/agent-runner-pluginization/HOST_SDK_INFRASTRUCTURE.md
index dadeab5b..d9ca602a 100644
--- a/docs/agent-runner-pluginization/HOST_SDK_INFRASTRUCTURE.md
+++ b/docs/agent-runner-pluginization/HOST_SDK_INFRASTRUCTURE.md
@@ -299,8 +299,10 @@ permissions:
   tools: ["detail", "call"]
   knowledge_bases: ["list", "retrieve"]
   history: ["page", "search"]
+  events: ["get", "page"]
   artifacts: ["metadata", "read"]
   storage: ["plugin", "workspace", "binding"]
+  files: ["config", "knowledge"]
   platform_api: []
 ```
 
diff --git a/docs/agent-runner-pluginization/PROTOCOL_V1.md b/docs/agent-runner-pluginization/PROTOCOL_V1.md
index 6608a088..8c60d3dd 100644
--- a/docs/agent-runner-pluginization/PROTOCOL_V1.md
+++ b/docs/agent-runner-pluginization/PROTOCOL_V1.md
@@ -121,6 +121,7 @@ class AgentRunnerPermissions(BaseModel):
     events: list[Literal["get", "page"]] = []
     artifacts: list[Literal["metadata", "read"]] = []
     storage: list[Literal["plugin", "workspace", "binding"]] = []
+    files: list[Literal["config", "knowledge"]] = []
     platform_api: list[str] = []
 ```
 
@@ -370,7 +371,6 @@ class AgentRunState(BaseModel):
     actor: dict[str, Any] = {}
     subject: dict[str, Any] = {}
     runner: dict[str, Any] = {}
-    binding: dict[str, Any] = {}
 ```
 
 State 是可选 host-owned snapshot。Runner 也可以完全自管状态。
@@ -382,13 +382,12 @@ class AgentResources(BaseModel):
     models: list[ModelResource] = []
     tools: list[ToolResource] = []
     knowledge_bases: list[KnowledgeBaseResource] = []
-    artifacts: list[ArtifactResource] = []
+    files: list[FileResource] = []
     storage: StorageResource = StorageResource()
-    history: HistoryResource = HistoryResource()
     platform_capabilities: dict[str, Any] = {}
 ```
 
-资源列表是本次 run 的授权结果。Runner 只能通过 `AgentRunAPIProxy` 访问这些资源。
+资源列表是本次 run 的授权结果。History / Event / Artifact 访问通过 permissions、`ctx.context.available_apis` 和 Host 侧 run session 校验控制，不作为可枚举 resource list 暴露。Runner 只能通过 `AgentRunAPIProxy` 访问这些能力。
 
 ## 6. Result Stream
 
diff --git a/src/langbot/pkg/agent/runner/host_models.py b/src/langbot/pkg/agent/runner/host_models.py
index 12ebf796..ffa96604 100644
--- a/src/langbot/pkg/agent/runner/host_models.py
+++ b/src/langbot/pkg/agent/runner/host_models.py
@@ -89,13 +89,13 @@ class ResourcePolicy(pydantic.BaseModel):
     """
 
     allowed_model_uuids: list[str] | None = None
-    """Allowed model UUIDs. None means all authorized."""
+    """Additional model UUID grants. None means no additional model grants."""
 
     allowed_tool_names: list[str] | None = None
-    """Allowed tool names. None means all authorized."""
+    """Additional tool name grants. None means no additional tool grants."""
 
     allowed_kb_uuids: list[str] | None = None
-    """Allowed knowledge base UUIDs. None means all authorized."""
+    """Additional knowledge base UUID grants. None means no additional KB grants."""
 
     allow_plugin_storage: bool = True
     """Whether plugin storage is allowed."""
diff --git a/src/langbot/pkg/agent/runner/orchestrator.py b/src/langbot/pkg/agent/runner/orchestrator.py
index f8bd3f03..90dafbf1 100644
--- a/src/langbot/pkg/agent/runner/orchestrator.py
+++ b/src/langbot/pkg/agent/runner/orchestrator.py
@@ -176,6 +176,13 @@ class AgentRunOrchestrator:
             runner_id=descriptor.id,
         )
 
+        # Register incoming attachments so input/transcript artifact_refs are resolvable.
+        await self._register_input_artifacts(
+            event=event,
+            run_id=run_id,
+            runner_id=descriptor.id,
+        )
+
         # Write user message to Transcript if message.received
         if event.event_type == 'message.received' and event.conversation_id:
             await self._write_user_transcript(
@@ -526,6 +533,97 @@ class AgentRunOrchestrator:
             event_time=datetime.datetime.fromtimestamp(event.event_time) if event.event_time else None,
         )
 
+    async def _register_input_artifacts(
+        self,
+        event: AgentEventEnvelope,
+        run_id: str,
+        runner_id: str,
+    ) -> None:
+        """Register current-event attachments referenced by AgentInput."""
+        if not event.input or not event.input.attachments:
+            return
+
+        from .artifact_store import ArtifactStore
+        store = ArtifactStore(self.ap.persistence_mgr.get_db_engine())
+
+        for attachment in event.input.attachments:
+            data = attachment.model_dump(mode='json') if hasattr(attachment, 'model_dump') else attachment
+            if not isinstance(data, dict):
+                continue
+
+            artifact_id = data.get('artifact_id')
+            artifact_type = data.get('artifact_type') or 'file'
+            if not artifact_id:
+                continue
+
+            content, parsed_mime_type = self._decode_attachment_content(data.get('content'))
+            url = data.get('url')
+            platform_ref_id = data.get('id')
+            storage_key = None
+            storage_type = 'metadata_only'
+            if content is None:
+                if url:
+                    storage_key = url
+                    storage_type = 'url'
+                elif platform_ref_id:
+                    storage_key = platform_ref_id
+                    storage_type = 'platform_ref'
+
+            metadata = {
+                'input_attachment': True,
+                'input_source': data.get('source') or 'platform',
+            }
+            if url:
+                metadata['url'] = url
+            if platform_ref_id:
+                metadata['platform_ref_id'] = platform_ref_id
+
+            try:
+                await store.register_artifact(
+                    artifact_id=artifact_id,
+                    artifact_type=artifact_type,
+                    source='platform',
+                    storage_key=storage_key,
+                    storage_type=storage_type,
+                    mime_type=data.get('mime_type') or parsed_mime_type,
+                    name=data.get('name'),
+                    size_bytes=data.get('size') or (len(content) if content is not None else None),
+                    conversation_id=event.conversation_id,
+                    run_id=run_id,
+                    runner_id=runner_id,
+                    bot_id=event.bot_id,
+                    workspace_id=event.workspace_id,
+                    metadata=metadata,
+                    content=content,
+                )
+            except Exception as e:
+                self.ap.logger.warning(
+                    f'Failed to register input artifact {artifact_id}: {e}'
+                )
+
+    def _decode_attachment_content(
+        self,
+        content: typing.Any,
+    ) -> tuple[bytes | None, str | None]:
+        """Decode base64 attachment content, including data URLs."""
+        if not isinstance(content, str) or not content:
+            return None, None
+
+        import base64
+        import binascii
+
+        mime_type = None
+        payload = content
+        if content.startswith('data:') and ',' in content:
+            header, payload = content.split(',', 1)
+            if ';base64' in header:
+                mime_type = header[5:].split(';', 1)[0] or None
+
+        try:
+            return base64.b64decode(payload, validate=False), mime_type
+        except (binascii.Error, ValueError):
+            return None, mime_type
+
     async def _write_user_transcript(
         self,
         event: AgentEventEnvelope,
diff --git a/src/langbot/pkg/agent/runner/persistent_state_store.py b/src/langbot/pkg/agent/runner/persistent_state_store.py
index 8208dd52..df4d6f8a 100644
--- a/src/langbot/pkg/agent/runner/persistent_state_store.py
+++ b/src/langbot/pkg/agent/runner/persistent_state_store.py
@@ -250,6 +250,8 @@ class PersistentStateStore:
 
         Used by State API handlers.
         """
+        state_key = normalize_state_key(state_key)
+
         async with self._db_engine.connect() as conn:
             result = await conn.execute(
                 select(AgentRunnerState.value_json)
@@ -282,6 +284,8 @@ class PersistentStateStore:
         Used by State API handlers.
         Context contains optional fields like bot_id, conversation_id, etc.
         """
+        state_key = normalize_state_key(state_key)
+
         # Validate and serialize value
         value_json, error = self._validate_json_value(value, logger)
         if error:
@@ -344,6 +348,8 @@ class PersistentStateStore:
 
         Returns True if deleted, False if not found.
         """
+        state_key = normalize_state_key(state_key)
+
         async with self._db_engine.begin() as conn:
             result = await conn.execute(
                 delete(AgentRunnerState)
@@ -376,6 +382,7 @@ class PersistentStateStore:
             )
 
             if prefix:
+                prefix = normalize_state_key(prefix)
                 query = query.where(
                     AgentRunnerState.state_key.like(f'{prefix}%')
                 )
diff --git a/src/langbot/pkg/agent/runner/resource_builder.py b/src/langbot/pkg/agent/runner/resource_builder.py
index d930c44a..b4df99e5 100644
--- a/src/langbot/pkg/agent/runner/resource_builder.py
+++ b/src/langbot/pkg/agent/runner/resource_builder.py
@@ -103,12 +103,13 @@ class AgentResourceBuilder:
         models: list[ModelResource] = []
         seen_model_ids: set[str] = set()
 
-        # Check manifest permission
         model_perms = manifest_perms.get('models', [])
-        if 'invoke' not in model_perms and 'stream' not in model_perms:
+        allow_llm = 'invoke' in model_perms or 'stream' in model_perms
+        allow_rerank = 'rerank' in model_perms
+        if not allow_llm and not allow_rerank:
             return models
 
-        # Get model UUIDs from resource policy
+        # Get additional model UUID grants from resource policy.
         allowed_uuids = resource_policy.allowed_model_uuids
 
         # Add model resources from binding config schema
@@ -117,10 +118,12 @@ class AgentResourceBuilder:
             seen_model_ids=seen_model_ids,
             descriptor=descriptor,
             runner_config=runner_config,
+            include_llm=allow_llm,
+            include_rerank=allow_rerank,
         )
 
         # Add explicitly allowed models
-        if allowed_uuids:
+        if allowed_uuids and allow_llm:
             for model_uuid in allowed_uuids:
                 await self._append_llm_model_resource(models, seen_model_ids, model_uuid)
 
@@ -168,13 +171,13 @@ class AgentResourceBuilder:
         if 'list' not in kb_perms and 'retrieve' not in kb_perms:
             return kb_resources
 
-        # Get KB UUIDs from schema-defined config fields
+        # Get KB UUID grants from schema-defined config fields.
         kb_uuids = config_schema.extract_knowledge_base_uuids(descriptor, runner_config)
 
-        # Also check resource policy
+        # Also include resource policy grants.
         allowed_uuids = resource_policy.allowed_kb_uuids
         if allowed_uuids:
-            kb_uuids = allowed_uuids
+            kb_uuids = list(dict.fromkeys([*kb_uuids, *allowed_uuids]))
 
         for kb_uuid in kb_uuids:
             try:
@@ -210,12 +213,14 @@ class AgentResourceBuilder:
         seen_model_ids: set[str],
         descriptor: AgentRunnerDescriptor,
         runner_config: dict[str, typing.Any],
+        include_llm: bool,
+        include_rerank: bool,
     ) -> None:
         """Authorize model-like values selected through DynamicForm fields."""
         for model_type, model_uuid in config_schema.iter_config_model_refs(descriptor, runner_config):
-            if model_type == 'llm':
+            if model_type == 'llm' and include_llm:
                 await self._append_llm_model_resource(models, seen_model_ids, model_uuid)
-            elif model_type == 'rerank':
+            elif model_type == 'rerank' and include_rerank:
                 await self._append_rerank_model_resource(models, seen_model_ids, model_uuid)
 
     async def _append_llm_model_resource(
diff --git a/src/langbot/pkg/agent/runner/transcript_store.py b/src/langbot/pkg/agent/runner/transcript_store.py
index 05064525..ef18115f 100644
--- a/src/langbot/pkg/agent/runner/transcript_store.py
+++ b/src/langbot/pkg/agent/runner/transcript_store.py
@@ -73,9 +73,6 @@ class TranscriptStore:
         if content and len(content) > self.MAX_CONTENT_LENGTH:
             content = content[:self.MAX_CONTENT_LENGTH - 3] + "..."
 
-        # Get next sequence number for this conversation
-        seq = await self._get_next_seq(conversation_id)
-
         async with self._session_factory() as session:
             item = Transcript(
                 transcript_id=transcript_id,
@@ -87,13 +84,15 @@ class TranscriptStore:
                 content=content,
                 content_json=json.dumps(content_json) if content_json else None,
                 artifact_refs_json=json.dumps(artifact_refs) if artifact_refs else None,
-                seq=seq,
+                seq=0,
                 run_id=run_id,
                 runner_id=runner_id,
                 created_at=datetime.datetime.utcnow(),
                 metadata_json=json.dumps(metadata) if metadata else None,
             )
             session.add(item)
+            await session.flush()
+            item.seq = item.id or await self._get_next_seq(conversation_id)
             await session.commit()
 
         return transcript_id
@@ -253,7 +252,7 @@ class TranscriptStore:
             return count > 0
 
     async def _get_next_seq(self, conversation_id: str) -> int:
-        """Get the next sequence number for a conversation."""
+        """Fallback next sequence number for stores that cannot expose autoincrement IDs."""
         async with self._session_factory() as session:
             result = await session.execute(
                 sqlalchemy.select(sqlalchemy.func.max(Transcript.seq))
diff --git a/src/langbot/pkg/entity/persistence/transcript.py b/src/langbot/pkg/entity/persistence/transcript.py
index 5d72340b..da0a894c 100644
--- a/src/langbot/pkg/entity/persistence/transcript.py
+++ b/src/langbot/pkg/entity/persistence/transcript.py
@@ -50,7 +50,7 @@ class Transcript(Base):
 
     # Sequence for cursor-based pagination
     seq = sqlalchemy.Column(sqlalchemy.Integer, nullable=False, index=True)
-    """Sequence number within conversation (auto-increment per conversation)."""
+    """Monotonic cursor sequence for pagination."""
 
     # Context
     run_id = sqlalchemy.Column(sqlalchemy.String(255), nullable=True, index=True)
diff --git a/src/langbot/pkg/plugin/handler.py b/src/langbot/pkg/plugin/handler.py
index 312d2877..0e5cb44a 100644
--- a/src/langbot/pkg/plugin/handler.py
+++ b/src/langbot/pkg/plugin/handler.py
@@ -141,6 +141,70 @@ def _validate_artifact_access(
     return False, f'Artifact {operation} access denied: artifact not in session conversation and not created by this run'
 
 
+async def _validate_agent_run_session(
+    run_id: str,
+    caller_plugin_identity: str | None,
+    ap: app.Application,
+    api_name: str,
+    permission_group: str | None = None,
+    permission_operation: str | None = None,
+) -> Union[tuple[None, handler.ActionResponse], tuple[Any, None]]:
+    """Validate an AgentRunner pull API run session and optional manifest permission."""
+    session_registry = get_session_registry()
+    session = await session_registry.get(run_id)
+    if not session:
+        return None, handler.ActionResponse.error(
+            message=f'Run session {run_id} not found or expired'
+        )
+
+    session_plugin_identity = session.get('plugin_identity')
+    if session_plugin_identity:
+        if not caller_plugin_identity:
+            return None, handler.ActionResponse.error(
+                message=f'caller_plugin_identity is required for run_id {run_id}'
+            )
+        if caller_plugin_identity != session_plugin_identity:
+            ap.logger.warning(
+                f'{api_name}: caller_plugin_identity {caller_plugin_identity} '
+                f'does not match session plugin_identity {session_plugin_identity}'
+            )
+            return None, handler.ActionResponse.error(
+                message=f'Plugin identity mismatch for run_id {run_id}'
+            )
+
+    if permission_group and permission_operation:
+        permissions = session.get('permissions', {})
+        allowed_operations = permissions.get(permission_group, [])
+        if permission_operation not in allowed_operations:
+            return None, handler.ActionResponse.error(
+                message=f'{api_name} access not authorized'
+            )
+
+    return session, None
+
+
+def _resolve_run_conversation(
+    session: dict[str, Any],
+    requested_conversation_id: str | None,
+    api_name: str,
+) -> tuple[str | None, handler.ActionResponse | None]:
+    """Resolve and enforce current-run conversation scope."""
+    session_conversation_id = session.get('conversation_id')
+
+    if requested_conversation_id:
+        if not session_conversation_id:
+            return None, handler.ActionResponse.error(
+                message=f'{api_name} is not available without a run conversation'
+            )
+        if requested_conversation_id != session_conversation_id:
+            return None, handler.ActionResponse.error(
+                message=f'Conversation {requested_conversation_id} is not accessible by this run'
+            )
+        return requested_conversation_id, None
+
+    return session_conversation_id, None
+
+
 def _normalize_uuid_list(values: Any) -> list[str]:
     """Normalize a user/config supplied UUID list while preserving order."""
     if not isinstance(values, list):
@@ -1197,7 +1261,7 @@ class RuntimeConnectionHandler(handler.Handler):
             kb_id = data['kb_id']
             query_text = data['query_text']
             top_k = data.get('top_k', 5)
-            filters = data.get('filters', {})
+            filters = data.get('filters') or {}
             run_id = data.get('run_id')  # Optional: present for AgentRunner calls
             caller_plugin_identity = data.get('caller_plugin_identity')  # Optional: for cross-plugin validation
 
@@ -1271,7 +1335,7 @@ class RuntimeConnectionHandler(handler.Handler):
             kb_id = data['kb_id']
             query_text = data['query_text']
             top_k = data.get('top_k', 5)
-            filters = data.get('filters', {})
+            filters = data.get('filters') or {}
             run_id = data.get('run_id')  # Optional: present for AgentRunner calls
             caller_plugin_identity = data.get('caller_plugin_identity')  # Optional: for cross-plugin validation
 
@@ -1342,29 +1406,24 @@ class RuntimeConnectionHandler(handler.Handler):
             if not run_id:
                 return handler.ActionResponse.error(message='run_id is required')
 
-            # Validate run session
-            session_registry = get_session_registry()
-            session = await session_registry.get(run_id)
-            if not session:
-                return handler.ActionResponse.error(
-                    message=f'Run session {run_id} not found or expired'
-                )
+            session, error = await _validate_agent_run_session(
+                run_id,
+                caller_plugin_identity,
+                self.ap,
+                'History page',
+                permission_group='history',
+                permission_operation='page',
+            )
+            if error:
+                return error
 
-            # Validate caller plugin identity (strict: required when session has plugin_identity)
-            session_plugin_identity = session.get('plugin_identity')
-            if session_plugin_identity:
-                if not caller_plugin_identity:
-                    return handler.ActionResponse.error(
-                        message=f'caller_plugin_identity is required for run_id {run_id}'
-                    )
-                if caller_plugin_identity != session_plugin_identity:
-                    return handler.ActionResponse.error(
-                        message=f'Plugin identity mismatch for run_id {run_id}'
-                    )
-
-            # Get conversation from session if not provided
-            if not conversation_id:
-                conversation_id = session.get('conversation_id')
+            conversation_id, scope_error = _resolve_run_conversation(
+                session,
+                conversation_id,
+                'History page',
+            )
+            if scope_error:
+                return scope_error
 
             if not conversation_id:
                 return handler.ActionResponse.success(data={
@@ -1411,35 +1470,32 @@ class RuntimeConnectionHandler(handler.Handler):
             """
             run_id = data.get('run_id')
             query_text = data.get('query', '')
-            filters = data.get('filters', {})
+            filters = data.get('filters') or {}
             top_k = data.get('top_k', 10)
             caller_plugin_identity = data.get('caller_plugin_identity')
 
             if not run_id:
                 return handler.ActionResponse.error(message='run_id is required')
 
-            # Validate run session
-            session_registry = get_session_registry()
-            session = await session_registry.get(run_id)
-            if not session:
-                return handler.ActionResponse.error(
-                    message=f'Run session {run_id} not found or expired'
-                )
+            session, error = await _validate_agent_run_session(
+                run_id,
+                caller_plugin_identity,
+                self.ap,
+                'History search',
+                permission_group='history',
+                permission_operation='search',
+            )
+            if error:
+                return error
 
-            # Validate caller plugin identity (strict: required when session has plugin_identity)
-            session_plugin_identity = session.get('plugin_identity')
-            if session_plugin_identity:
-                if not caller_plugin_identity:
-                    return handler.ActionResponse.error(
-                        message=f'caller_plugin_identity is required for run_id {run_id}'
-                    )
-                if caller_plugin_identity != session_plugin_identity:
-                    return handler.ActionResponse.error(
-                        message=f'Plugin identity mismatch for run_id {run_id}'
-                    )
-
-            # Get conversation from session or filters
-            conversation_id = filters.get('conversation_id') or session.get('conversation_id')
+            requested_conversation_id = filters.get('conversation_id')
+            conversation_id, scope_error = _resolve_run_conversation(
+                session,
+                requested_conversation_id,
+                'History search',
+            )
+            if scope_error:
+                return scope_error
 
             if not conversation_id:
                 return handler.ActionResponse.success(data={
@@ -1453,10 +1509,11 @@ class RuntimeConnectionHandler(handler.Handler):
             store = TranscriptStore(self.ap.persistence_mgr.get_db_engine())
 
             try:
+                safe_filters = {k: v for k, v in filters.items() if k != 'conversation_id'}
                 items = await store.search_transcript(
                     conversation_id=conversation_id,
                     query_text=query_text,
-                    filters=filters,
+                    filters=safe_filters,
                     top_k=top_k,
                 )
 
@@ -1485,25 +1542,16 @@ class RuntimeConnectionHandler(handler.Handler):
             if not event_id:
                 return handler.ActionResponse.error(message='event_id is required')
 
-            # Validate run session
-            session_registry = get_session_registry()
-            session = await session_registry.get(run_id)
-            if not session:
-                return handler.ActionResponse.error(
-                    message=f'Run session {run_id} not found or expired'
-                )
-
-            # Validate caller plugin identity (strict: required when session has plugin_identity)
-            session_plugin_identity = session.get('plugin_identity')
-            if session_plugin_identity:
-                if not caller_plugin_identity:
-                    return handler.ActionResponse.error(
-                        message=f'caller_plugin_identity is required for run_id {run_id}'
-                    )
-                if caller_plugin_identity != session_plugin_identity:
-                    return handler.ActionResponse.error(
-                        message=f'Plugin identity mismatch for run_id {run_id}'
-                    )
+            session, error = await _validate_agent_run_session(
+                run_id,
+                caller_plugin_identity,
+                self.ap,
+                'Event get',
+                permission_group='events',
+                permission_operation='get',
+            )
+            if error:
+                return error
 
             # Get event
             from ..agent.runner.event_log_store import EventLogStore
@@ -1516,9 +1564,12 @@ class RuntimeConnectionHandler(handler.Handler):
                         message=f'Event {event_id} not found'
                     )
 
-                # Validate event is in the same conversation as the run
+                # Validate event is in the same conversation as the run, or was created by the same run.
                 session_conversation_id = session.get('conversation_id')
-                if session_conversation_id and event.get('conversation_id') != session_conversation_id:
+                event_run_id = event.get('run_id')
+                if event_run_id and event_run_id == run_id:
+                    return handler.ActionResponse.success(data=event)
+                if not session_conversation_id or event.get('conversation_id') != session_conversation_id:
                     return handler.ActionResponse.error(
                         message=f'Event {event_id} is not accessible by this run'
                     )
@@ -1544,29 +1595,24 @@ class RuntimeConnectionHandler(handler.Handler):
             if not run_id:
                 return handler.ActionResponse.error(message='run_id is required')
 
-            # Validate run session
-            session_registry = get_session_registry()
-            session = await session_registry.get(run_id)
-            if not session:
-                return handler.ActionResponse.error(
-                    message=f'Run session {run_id} not found or expired'
-                )
+            session, error = await _validate_agent_run_session(
+                run_id,
+                caller_plugin_identity,
+                self.ap,
+                'Event page',
+                permission_group='events',
+                permission_operation='page',
+            )
+            if error:
+                return error
 
-            # Validate caller plugin identity (strict: required when session has plugin_identity)
-            session_plugin_identity = session.get('plugin_identity')
-            if session_plugin_identity:
-                if not caller_plugin_identity:
-                    return handler.ActionResponse.error(
-                        message=f'caller_plugin_identity is required for run_id {run_id}'
-                    )
-                if caller_plugin_identity != session_plugin_identity:
-                    return handler.ActionResponse.error(
-                        message=f'Plugin identity mismatch for run_id {run_id}'
-                    )
-
-            # Get conversation from session if not provided
-            if not conversation_id:
-                conversation_id = session.get('conversation_id')
+            conversation_id, scope_error = _resolve_run_conversation(
+                session,
+                conversation_id,
+                'Event page',
+            )
+            if scope_error:
+                return scope_error
 
             if not conversation_id:
                 return handler.ActionResponse.success(data={
@@ -1620,33 +1666,16 @@ class RuntimeConnectionHandler(handler.Handler):
             if not artifact_id:
                 return handler.ActionResponse.error(message='artifact_id is required')
 
-            # Validate run session
-            session_registry = get_session_registry()
-            session = await session_registry.get(run_id)
-            if not session:
-                return handler.ActionResponse.error(
-                    message=f'Run session {run_id} not found or expired'
-                )
-
-            # Validate caller plugin identity (strict: required when session has plugin_identity)
-            session_plugin_identity = session.get('plugin_identity')
-            if session_plugin_identity:
-                if not caller_plugin_identity:
-                    return handler.ActionResponse.error(
-                        message=f'caller_plugin_identity is required for run_id {run_id}'
-                    )
-                if caller_plugin_identity != session_plugin_identity:
-                    return handler.ActionResponse.error(
-                        message=f'Plugin identity mismatch for run_id {run_id}'
-                    )
-
-            # Check artifact permission from session.permissions (from descriptor.permissions)
-            permissions = session.get('permissions', {})
-            artifact_permissions = permissions.get('artifacts', [])
-            if 'metadata' not in artifact_permissions:
-                return handler.ActionResponse.error(
-                    message='Artifact metadata access not authorized'
-                )
+            session, error = await _validate_agent_run_session(
+                run_id,
+                caller_plugin_identity,
+                self.ap,
+                'Artifact metadata',
+                permission_group='artifacts',
+                permission_operation='metadata',
+            )
+            if error:
+                return error
 
             # Get artifact metadata
             from ..agent.runner.artifact_store import ArtifactStore
@@ -1708,33 +1737,16 @@ class RuntimeConnectionHandler(handler.Handler):
                 if limit <= 0:
                     return handler.ActionResponse.error(message='limit must be > 0')
 
-            # Validate run session
-            session_registry = get_session_registry()
-            session = await session_registry.get(run_id)
-            if not session:
-                return handler.ActionResponse.error(
-                    message=f'Run session {run_id} not found or expired'
-                )
-
-            # Validate caller plugin identity (strict: required when session has plugin_identity)
-            session_plugin_identity = session.get('plugin_identity')
-            if session_plugin_identity:
-                if not caller_plugin_identity:
-                    return handler.ActionResponse.error(
-                        message=f'caller_plugin_identity is required for run_id {run_id}'
-                    )
-                if caller_plugin_identity != session_plugin_identity:
-                    return handler.ActionResponse.error(
-                        message=f'Plugin identity mismatch for run_id {run_id}'
-                    )
-
-            # Check artifact permission from session.permissions (from descriptor.permissions)
-            permissions = session.get('permissions', {})
-            artifact_permissions = permissions.get('artifacts', [])
-            if 'read' not in artifact_permissions:
-                return handler.ActionResponse.error(
-                    message='Artifact read access not authorized'
-                )
+            session, error = await _validate_agent_run_session(
+                run_id,
+                caller_plugin_identity,
+                self.ap,
+                'Artifact read',
+                permission_group='artifacts',
+                permission_operation='read',
+            )
+            if error:
+                return error
 
             # Get artifact metadata first to validate access
             from ..agent.runner.artifact_store import ArtifactStore
diff --git a/tests/unit_tests/agent/test_history_event_api_auth.py b/tests/unit_tests/agent/test_history_event_api_auth.py
new file mode 100644
index 00000000..00728fe5
--- /dev/null
+++ b/tests/unit_tests/agent/test_history_event_api_auth.py
@@ -0,0 +1,146 @@
+"""Tests for AgentRunner history/event pull API authorization."""
+from __future__ import annotations
+
+from unittest.mock import MagicMock
+
+import pytest
+from sqlalchemy.ext.asyncio import create_async_engine
+
+from langbot.pkg.agent.runner.session_registry import AgentRunSessionRegistry
+from langbot.pkg.plugin.handler import RuntimeConnectionHandler
+from langbot_plugin.entities.io.actions.enums import PluginToRuntimeAction
+
+from .conftest import make_resources
+
+
+class FakeConnection:
+    pass
+
+
+class FakeApplication:
+    def __init__(self, db_engine):
+        self.logger = MagicMock()
+        self.persistence_mgr = MagicMock()
+        self.persistence_mgr.get_db_engine = MagicMock(return_value=db_engine)
+
+
+@pytest.fixture
+def session_registry(monkeypatch):
+    registry = AgentRunSessionRegistry()
+    monkeypatch.setattr(
+        'langbot.pkg.agent.runner.session_registry._global_registry',
+        registry,
+    )
+    return registry
+
+
+@pytest.fixture
+async def db_engine():
+    engine = create_async_engine('sqlite+aiosqlite:///:memory:')
+    yield engine
+    await engine.dispose()
+
+
+def _handler(db_engine, session_registry):
+    async def fake_disconnect():
+        return True
+
+    fake_app = FakeApplication(db_engine)
+    return RuntimeConnectionHandler(FakeConnection(), fake_disconnect, fake_app)
+
+
+async def _register_session(
+    session_registry,
+    *,
+    run_id='run_1',
+    conversation_id='conv_1',
+    permissions=None,
+):
+    await session_registry.register(
+        run_id=run_id,
+        runner_id='plugin:test/runner/default',
+        query_id=None,
+        plugin_identity='test/runner',
+        resources=make_resources(),
+        conversation_id=conversation_id,
+        permissions=permissions or {},
+    )
+
+
+@pytest.mark.asyncio
+async def test_history_page_requires_manifest_permission(session_registry, db_engine):
+    await _register_session(session_registry, permissions={'history': []})
+    handler = _handler(db_engine, session_registry)
+    history_page = handler.actions[PluginToRuntimeAction.HISTORY_PAGE.value]
+
+    result = await history_page({
+        'run_id': 'run_1',
+        'caller_plugin_identity': 'test/runner',
+    })
+
+    assert result.code != 0
+    assert 'not authorized' in result.message.lower()
+
+
+@pytest.mark.asyncio
+async def test_history_page_rejects_cross_conversation(session_registry, db_engine):
+    await _register_session(session_registry, permissions={'history': ['page']})
+    handler = _handler(db_engine, session_registry)
+    history_page = handler.actions[PluginToRuntimeAction.HISTORY_PAGE.value]
+
+    result = await history_page({
+        'run_id': 'run_1',
+        'conversation_id': 'conv_other',
+        'caller_plugin_identity': 'test/runner',
+    })
+
+    assert result.code != 0
+    assert 'not accessible' in result.message.lower()
+
+
+@pytest.mark.asyncio
+async def test_history_search_rejects_filter_conversation_override(session_registry, db_engine):
+    await _register_session(session_registry, permissions={'history': ['search']})
+    handler = _handler(db_engine, session_registry)
+    history_search = handler.actions[PluginToRuntimeAction.HISTORY_SEARCH.value]
+
+    result = await history_search({
+        'run_id': 'run_1',
+        'query': 'hello',
+        'filters': {'conversation_id': 'conv_other'},
+        'caller_plugin_identity': 'test/runner',
+    })
+
+    assert result.code != 0
+    assert 'not accessible' in result.message.lower()
+
+
+@pytest.mark.asyncio
+async def test_event_page_requires_manifest_permission(session_registry, db_engine):
+    await _register_session(session_registry, permissions={'events': []})
+    handler = _handler(db_engine, session_registry)
+    event_page = handler.actions[PluginToRuntimeAction.EVENT_PAGE.value]
+
+    result = await event_page({
+        'run_id': 'run_1',
+        'caller_plugin_identity': 'test/runner',
+    })
+
+    assert result.code != 0
+    assert 'not authorized' in result.message.lower()
+
+
+@pytest.mark.asyncio
+async def test_event_page_rejects_cross_conversation(session_registry, db_engine):
+    await _register_session(session_registry, permissions={'events': ['page']})
+    handler = _handler(db_engine, session_registry)
+    event_page = handler.actions[PluginToRuntimeAction.EVENT_PAGE.value]
+
+    result = await event_page({
+        'run_id': 'run_1',
+        'conversation_id': 'conv_other',
+        'caller_plugin_identity': 'test/runner',
+    })
+
+    assert result.code != 0
+    assert 'not accessible' in result.message.lower()
diff --git a/tests/unit_tests/agent/test_resource_builder.py b/tests/unit_tests/agent/test_resource_builder.py
index 1576a430..48d94032 100644
--- a/tests/unit_tests/agent/test_resource_builder.py
+++ b/tests/unit_tests/agent/test_resource_builder.py
@@ -18,6 +18,7 @@ def make_descriptor(
     *,
     permissions: dict | None = None,
     config_schema: list[dict] | None = None,
+    capabilities: dict | None = None,
 ) -> AgentRunnerDescriptor:
     return AgentRunnerDescriptor(
         id=RUNNER_ID,
@@ -26,6 +27,7 @@ def make_descriptor(
         plugin_author='test',
         plugin_name='runner',
         runner_name='default',
+        capabilities=capabilities or {},
         permissions=permissions or {'models': ['invoke', 'stream']},
         config_schema=config_schema or [],
     )
@@ -99,6 +101,7 @@ async def test_build_models_authorizes_config_declared_llm_and_rerank_models(app
     app.model_mgr.get_model_by_uuid = AsyncMock(side_effect=get_model_by_uuid)
     app.model_mgr.get_rerank_model_by_uuid = AsyncMock(side_effect=get_rerank_model_by_uuid)
     descriptor = make_descriptor(
+        permissions={'models': ['invoke', 'stream', 'rerank']},
         config_schema=[
             {'name': 'model', 'type': 'model-fallback-selector'},
             {'name': 'aux-model', 'type': 'llm-model-selector'},
@@ -145,6 +148,33 @@ async def test_build_models_still_honors_manifest_permissions(app):
     app.model_mgr.get_rerank_model_by_uuid.assert_not_awaited()
 
 
+@pytest.mark.asyncio
+async def test_build_models_authorizes_rerank_only_runner(app):
+    """A rerank-only runner should receive config-selected rerank models."""
+    app.model_mgr.get_model_by_uuid = AsyncMock(return_value=make_model())
+    app.model_mgr.get_rerank_model_by_uuid = AsyncMock(
+        return_value=make_model(model_type='rerank', provider='rerank-provider')
+    )
+    descriptor = make_descriptor(
+        permissions={'models': ['rerank']},
+        config_schema=[
+            {'name': 'model', 'type': 'llm-model-selector'},
+            {'name': 'rerank-model', 'type': 'rerank-model-selector'},
+        ],
+    )
+    query = make_query({
+        'model': 'llm',
+        'rerank-model': 'rerank',
+    })
+
+    resources = await build_resources(app, query, descriptor)
+
+    assert resources['models'] == [
+        {'model_id': 'rerank', 'model_type': 'rerank', 'provider': 'rerank-provider'},
+    ]
+    app.model_mgr.get_model_by_uuid.assert_not_awaited()
+
+
 @pytest.mark.asyncio
 async def test_build_models_deduplicates_query_and_config_models(app):
     """A model selected by both preproc and runner config should appear once."""
@@ -197,3 +227,37 @@ async def test_build_tools_authorizes_query_declared_tools(app):
             'description': None,
         },
     ]
+
+
+@pytest.mark.asyncio
+async def test_build_knowledge_bases_unions_config_and_policy_grants(app):
+    descriptor = make_descriptor(
+        capabilities={'knowledge_retrieval': True},
+        permissions={
+            'models': [],
+            'knowledge_bases': ['retrieve'],
+        },
+        config_schema=[
+            {'name': 'knowledge-bases', 'type': 'knowledge-base-multi-selector'},
+        ],
+    )
+    query = make_query(
+        {'knowledge-bases': ['kb_config']},
+        variables={'_knowledge_base_uuids': ['kb_policy']},
+    )
+
+    async def get_kb(kb_uuid):
+        return SimpleNamespace(
+            uuid=kb_uuid,
+            get_name=lambda: f'name-{kb_uuid}',
+            knowledge_base_entity=SimpleNamespace(kb_type='default'),
+        )
+
+    app.rag_mgr.get_knowledge_base_by_uuid = AsyncMock(side_effect=get_kb)
+
+    resources = await build_resources(app, query, descriptor)
+
+    assert resources['knowledge_bases'] == [
+        {'kb_id': 'kb_config', 'kb_name': 'name-kb_config', 'kb_type': 'default'},
+        {'kb_id': 'kb_policy', 'kb_name': 'name-kb_policy', 'kb_type': 'default'},
+    ]
diff --git a/tests/unit_tests/agent/test_state_store.py b/tests/unit_tests/agent/test_state_store.py
index 88e9d5fe..05166110 100644
--- a/tests/unit_tests/agent/test_state_store.py
+++ b/tests/unit_tests/agent/test_state_store.py
@@ -213,6 +213,30 @@ class TestPersistentStateStore:
         snapshot = await persistent_store.build_snapshot_from_event(event, binding, descriptor)
         assert snapshot['conversation']['test_key'] == {'nested': 'value'}
 
+    @pytest.mark.asyncio
+    async def test_state_api_methods_normalize_public_key_aliases(self, persistent_store):
+        scope_key = 'conversation:runner:binding:conv_001'
+
+        success, error = await persistent_store.state_set(
+            scope_key=scope_key,
+            state_key='conversation_id',
+            value='conv_001',
+            runner_id='plugin:test/my-runner/default',
+            binding_identity='binding_001',
+            scope='conversation',
+        )
+
+        assert success is True
+        assert error is None
+        assert await persistent_store.state_get(scope_key, 'external.conversation_id') == 'conv_001'
+        assert await persistent_store.state_get(scope_key, 'conversation_id') == 'conv_001'
+
+        keys, _ = await persistent_store.state_list(scope_key, prefix='conversation_id')
+        assert keys == ['external.conversation_id']
+
+        assert await persistent_store.state_delete(scope_key, 'conversation_id') is True
+        assert await persistent_store.state_get(scope_key, 'external.conversation_id') is None
+
     @pytest.mark.asyncio
     async def test_binding_isolation(self, persistent_store):
         descriptor = make_descriptor()