diff --git a/CHANGELOG.md b/CHANGELOG.md
index 93dab10..551581a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,23 @@ existing `0.1.0` release; earlier development prereleases are not listed.
 
 ## [Unreleased]
 
+### Added
+
+- Add typed Forward Session budgets across create/update responses and events, including omission, explicit null clearing and decimal-string limits.
+- Add Forward Session `config.model` overrides and model `speed` configuration, plus optional approval evaluation details, Outcome/status event fields and cumulative top-level Credits on `session.usage`.
+- Add `startup_script` to Forward/Managed Environment models and Managed cloud/self-hosted parameters. It runs on sandbox start/resume; the external worker controls self-hosted execution.
+- Add Managed Memory `version`, version `redacted`, and Vault creation-response `credentials` fields. Vault creation still does not accept credentials in its request.
+
+### Fixed
+
+- Declare Managed Memory list-item metadata/version fields so strict response parsing provides typed access instead of unknown attributes.
+
+### Migration
+
+- Forward `sessions.create()` and `sessions.update()` accept `budget=` directly. Omit it to keep the default/current limit, or pass `None` to clear it.
+- Omit `config.model` on create to inherit; `{"model": None}` restores inheritance on update. Optional approval details are under `event.evaluation.evaluated_permission`; the top-level approval result remains a string, with legacy object parsing retained for compatibility.
+- Managed Thread `usage` is deprecated because current responses omit it; read Session Credits instead. Treat `session.usage` as cumulative snapshots rather than adding successive events.
+
 ### Changed
 
 - Remove resource-specific sections and inventories from the README to keep it focused on SDK setup and shared client behavior.
diff --git a/README.md b/README.md
index 97e3b4e..83886ae 100644
--- a/README.md
+++ b/README.md
@@ -157,6 +157,22 @@ asyncio.run(main())
 
 Every method shown in this document has an async counterpart with the same name and signature. Async streams are opened with `async with await client.sessions.events.stream(...)`.
 
+## Environment startup scripts
+
+Both Forward and Managed accept `config.startup_script`. For cloud environments,
+it runs after `setup_script` on the first sandbox start and again on every resume,
+before the first tool call. The server enforces a 64 KB limit and a 5-minute
+timeout. Scripts must exit; start long-lived services in the background and wait
+for readiness when needed.
+
+Failure emits a `session.error` event whose `error.type` is
+`environment_startup_failed_error`; the session and sandbox remain usable.
+The script is not retried during the same start. For self-hosted environments,
+the API stores and returns the script; execution depends on the external worker.
+See the official [Forward](https://docs.qoder.com/cloud-agents/api/forward/environments/schemas#environment-startup-script)
+and [Managed](https://docs.qoder.com/cloud-agents/api/environments/schemas#environment-startup-script)
+contracts.
+
 ## Streaming
 
 Streaming responses are consumed incrementally. Close the stream when finished and handle interruption explicitly; closing a local stream does not cancel server-side work.
diff --git a/docs/api/reference.md b/docs/api/reference.md
index 7d19e87..61ea7a8 100644
--- a/docs/api/reference.md
+++ b/docs/api/reference.md
@@ -8500,6 +8500,7 @@ def create(
         *,
         identity_id: str,
         template_id: str,
+        budget: Union[BudgetLimitParam, None, NotGiven] = NOT_GIVEN,
         title: Union[str, None, NotGiven] = NOT_GIVEN,
         metadata: Union[Dict[str, Any], None, NotGiven] = NOT_GIVEN,
         config: Union[SessionCreateParamsConfigParam, None,
@@ -8545,6 +8546,7 @@ GET /sessions/{session_id}.
 def update(
         session_id: str,
         *,
+        budget: Union[BudgetLimitParam, None, NotGiven] = NOT_GIVEN,
         title: Union[str, None, NotGiven] = NOT_GIVEN,
         metadata: Union[Dict[str, Any], None, NotGiven] = NOT_GIVEN,
         config: Union[SessionUpdateParamsConfigParam, None,
@@ -8688,6 +8690,7 @@ async def create(
         *,
         identity_id: str,
         template_id: str,
+        budget: Union[BudgetLimitParam, None, NotGiven] = NOT_GIVEN,
         title: Union[str, None, NotGiven] = NOT_GIVEN,
         metadata: Union[Dict[str, Any], None, NotGiven] = NOT_GIVEN,
         config: Union[SessionCreateParamsConfigParam, None,
@@ -8733,6 +8736,7 @@ GET /sessions/{session_id}.
 async def update(
         session_id: str,
         *,
+        budget: Union[BudgetLimitParam, None, NotGiven] = NOT_GIVEN,
         title: Union[str, None, NotGiven] = NOT_GIVEN,
         metadata: Union[Dict[str, Any], None, NotGiven] = NOT_GIVEN,
         config: Union[SessionUpdateParamsConfigParam, None,
@@ -11575,6 +11579,50 @@ class BatchUsage(BaseModel)
 
 #### total\_credits
 
+<a id="qca.forward.types.budget_limit"></a>
+
+# qca.forward.types.budget\_limit
+
+<a id="qca.forward.types.budget_limit.BudgetLimit"></a>
+
+## BudgetLimit
+
+```python
+class BudgetLimit(BaseModel)
+```
+
+[[view_source]](https://github.com/QoderAI/qoder-cloud-agents-sdk-python/blob/main/src/qca/forward/types/budget_limit.py)
+
+<a id="qca.forward.types.budget_limit.BudgetLimit.max_credit_cost"></a>
+
+#### max\_credit\_cost
+
+<a id="qca.forward.types.budget_limit.BudgetLimit.type"></a>
+
+#### type
+
+<a id="qca.forward.types.budget_limit_param"></a>
+
+# qca.forward.types.budget\_limit\_param
+
+<a id="qca.forward.types.budget_limit_param.BudgetLimitParam"></a>
+
+## BudgetLimitParam
+
+```python
+class BudgetLimitParam(TypedDict)
+```
+
+[[view_source]](https://github.com/QoderAI/qoder-cloud-agents-sdk-python/blob/main/src/qca/forward/types/budget_limit_param.py)
+
+<a id="qca.forward.types.budget_limit_param.BudgetLimitParam.max_credit_cost"></a>
+
+#### max\_credit\_cost
+
+<a id="qca.forward.types.budget_limit_param.BudgetLimitParam.type"></a>
+
+#### type
+
 <a id="qca.forward.types.channel"></a>
 
 # qca.forward.types.channel
@@ -13496,6 +13544,10 @@ class EnvironmentConfig(BaseModel)
 
 [[view_source]](https://github.com/QoderAI/qoder-cloud-agents-sdk-python/blob/main/src/qca/forward/types/environment_config.py)
 
+<a id="qca.forward.types.environment_config.EnvironmentConfig.startup_script"></a>
+
+#### startup\_script
+
 <a id="qca.forward.types.environment_config.EnvironmentConfig.setup_script"></a>
 
 #### setup\_script
@@ -15444,6 +15496,10 @@ class ModelConfig(BaseModel)
 
 #### effort
 
+<a id="qca.forward.types.model_config.ModelConfig.speed"></a>
+
+#### speed
+
 <a id="qca.forward.types.model_config.ModelConfig.context_window"></a>
 
 #### context\_window
@@ -15470,6 +15526,10 @@ class ModelConfigParam(TypedDict)
 
 #### effort
 
+<a id="qca.forward.types.model_config_param.ModelConfigParam.speed"></a>
+
+#### speed
+
 <a id="qca.forward.types.model_config_param.ModelConfigParam.context_window"></a>
 
 #### context\_window
@@ -17360,6 +17420,10 @@ class Session(BaseModel)
 
 [[view_source]](https://github.com/QoderAI/qoder-cloud-agents-sdk-python/blob/main/src/qca/forward/types/session.py)
 
+<a id="qca.forward.types.session.Session.budget"></a>
+
+#### budget
+
 <a id="qca.forward.types.session.Session.outcome_evaluations"></a>
 
 #### outcome\_evaluations
@@ -17474,6 +17538,10 @@ class SessionConfig(BaseModel)
 
 [[view_source]](https://github.com/QoderAI/qoder-cloud-agents-sdk-python/blob/main/src/qca/forward/types/session_config.py)
 
+<a id="qca.forward.types.session_config.SessionConfig.model"></a>
+
+#### model
+
 <a id="qca.forward.types.session_config.SessionConfig.environment_variables"></a>
 
 #### environment\_variables
@@ -17492,6 +17560,10 @@ class SessionCreateParams(TypedDict)
 
 [[view_source]](https://github.com/QoderAI/qoder-cloud-agents-sdk-python/blob/main/src/qca/forward/types/session_create_params.py)
 
+<a id="qca.forward.types.session_create_params.SessionCreateParams.budget"></a>
+
+#### budget
+
 <a id="qca.forward.types.session_create_params.SessionCreateParams.identity_id"></a>
 
 #### identity\_id
@@ -17534,6 +17606,10 @@ class SessionCreateParamsConfigParam(TypedDict)
 
 [[view_source]](https://github.com/QoderAI/qoder-cloud-agents-sdk-python/blob/main/src/qca/forward/types/session_create_params_config_param.py)
 
+<a id="qca.forward.types.session_create_params_config_param.SessionCreateParamsConfigParam.model"></a>
+
+#### model
+
 <a id="qca.forward.types.session_create_params_config_param.SessionCreateParamsConfigParam.environment_variables"></a>
 
 #### environment\_variables
@@ -17552,6 +17628,42 @@ class SessionEvent(BaseModel)
 
 [[view_source]](https://github.com/QoderAI/qoder-cloud-agents-sdk-python/blob/main/src/qca/forward/types/session_event.py)
 
+<a id="qca.forward.types.session_event.SessionEvent.evaluation"></a>
+
+#### evaluation
+
+<a id="qca.forward.types.session_event.SessionEvent.budget"></a>
+
+#### budget
+
+<a id="qca.forward.types.session_event.SessionEvent.reason"></a>
+
+#### reason
+
+<a id="qca.forward.types.session_event.SessionEvent.iteration"></a>
+
+#### iteration
+
+<a id="qca.forward.types.session_event.SessionEvent.explanation"></a>
+
+#### explanation
+
+<a id="qca.forward.types.session_event.SessionEvent.outcome_evaluation_start_id"></a>
+
+#### outcome\_evaluation\_start\_id
+
+<a id="qca.forward.types.session_event.SessionEvent.model_credits"></a>
+
+#### model\_credits
+
+<a id="qca.forward.types.session_event.SessionEvent.sandbox_runtime_credits"></a>
+
+#### sandbox\_runtime\_credits
+
+<a id="qca.forward.types.session_event.SessionEvent.total_credits"></a>
+
+#### total\_credits
+
 <a id="qca.forward.types.session_event.SessionEvent.id"></a>
 
 #### id
@@ -18398,6 +18510,10 @@ class SessionUpdateParams(TypedDict)
 
 [[view_source]](https://github.com/QoderAI/qoder-cloud-agents-sdk-python/blob/main/src/qca/forward/types/session_update_params.py)
 
+<a id="qca.forward.types.session_update_params.SessionUpdateParams.budget"></a>
+
+#### budget
+
 <a id="qca.forward.types.session_update_params.SessionUpdateParams.title"></a>
 
 #### title
@@ -18428,6 +18544,10 @@ class SessionUpdateParamsConfigParam(TypedDict)
 
 [[view_source]](https://github.com/QoderAI/qoder-cloud-agents-sdk-python/blob/main/src/qca/forward/types/session_update_params_config_param.py)
 
+<a id="qca.forward.types.session_update_params_config_param.SessionUpdateParamsConfigParam.model"></a>
+
+#### model
+
 <a id="qca.forward.types.session_update_params_config_param.SessionUpdateParamsConfigParam.environment_variables"></a>
 
 #### environment\_variables
@@ -19420,6 +19540,50 @@ class Tool(BaseModel)
 
 #### input\_schema
 
+<a id="qca.forward.types.tool_approval_evaluation"></a>
+
+# qca.forward.types.tool\_approval\_evaluation
+
+<a id="qca.forward.types.tool_approval_evaluation.ToolApprovalDecision"></a>
+
+## ToolApprovalDecision
+
+```python
+class ToolApprovalDecision(BaseModel)
+```
+
+[[view_source]](https://github.com/QoderAI/qoder-cloud-agents-sdk-python/blob/main/src/qca/forward/types/tool_approval_evaluation.py)
+
+Automatic decision; reason_code may be indeterminate or high_risk.
+
+<a id="qca.forward.types.tool_approval_evaluation.ToolApprovalDecision.type"></a>
+
+#### type
+
+<a id="qca.forward.types.tool_approval_evaluation.ToolApprovalDecision.reason_code"></a>
+
+#### reason\_code
+
+<a id="qca.forward.types.tool_approval_evaluation.ToolApprovalEvaluation"></a>
+
+## ToolApprovalEvaluation
+
+```python
+class ToolApprovalEvaluation(BaseModel)
+```
+
+[[view_source]](https://github.com/QoderAI/qoder-cloud-agents-sdk-python/blob/main/src/qca/forward/types/tool_approval_evaluation.py)
+
+Policy source (always_allow, always_ask, auto) and optional automatic decision.
+
+<a id="qca.forward.types.tool_approval_evaluation.ToolApprovalEvaluation.type"></a>
+
+#### type
+
+<a id="qca.forward.types.tool_approval_evaluation.ToolApprovalEvaluation.evaluated_permission"></a>
+
+#### evaluated\_permission
+
 <a id="qca.forward.types.tool_config"></a>
 
 # qca.forward.types.tool\_config
@@ -28217,6 +28381,10 @@ class CloudConfigParams(TypedDict)
 
 #### storage
 
+<a id="qca.managed.types.cloud_config_params.CloudConfigParams.startup_script"></a>
+
+#### startup\_script
+
 <a id="qca.managed.types.cloud_config_params.CloudConfigParams.setup_script"></a>
 
 #### setup\_script
@@ -30301,6 +30469,10 @@ class EnvironmentConfigUnion(BaseModel)
 
 #### storage
 
+<a id="qca.managed.types.environment_config_union.EnvironmentConfigUnion.startup_script"></a>
+
+#### startup\_script
+
 <a id="qca.managed.types.environment_config_union.EnvironmentConfigUnion.setup_script"></a>
 
 #### setup\_script
@@ -31939,6 +32111,10 @@ class Memory(BaseModel)
 
 [[view_source]](https://github.com/QoderAI/qoder-cloud-agents-sdk-python/blob/main/src/qca/managed/types/memory.py)
 
+<a id="qca.managed.types.memory.Memory.version"></a>
+
+#### version
+
 <a id="qca.managed.types.memory.Memory.metadata"></a>
 
 #### metadata
@@ -31997,6 +32173,14 @@ class MemoryListItemUnion(BaseModel)
 
 [[view_source]](https://github.com/QoderAI/qoder-cloud-agents-sdk-python/blob/main/src/qca/managed/types/memory_list_item_union.py)
 
+<a id="qca.managed.types.memory_list_item_union.MemoryListItemUnion.metadata"></a>
+
+#### metadata
+
+<a id="qca.managed.types.memory_list_item_union.MemoryListItemUnion.version"></a>
+
+#### version
+
 <a id="qca.managed.types.memory_list_item_union.MemoryListItemUnion.id"></a>
 
 #### id
@@ -32665,6 +32849,10 @@ class MemoryVersion(BaseModel)
 
 [[view_source]](https://github.com/QoderAI/qoder-cloud-agents-sdk-python/blob/main/src/qca/managed/types/memory_version.py)
 
+<a id="qca.managed.types.memory_version.MemoryVersion.redacted"></a>
+
+#### redacted
+
 <a id="qca.managed.types.memory_version.MemoryVersion.id"></a>
 
 #### id
@@ -33707,6 +33895,10 @@ class SelfHostedConfigParams(TypedDict)
 
 [[view_source]](https://github.com/QoderAI/qoder-cloud-agents-sdk-python/blob/main/src/qca/managed/types/self_hosted_config_params.py)
 
+<a id="qca.managed.types.self_hosted_config_params.SelfHostedConfigParams.startup_script"></a>
+
+#### startup\_script
+
 <a id="qca.managed.types.self_hosted_config_params.SelfHostedConfigParams.setup_script"></a>
 
 #### setup\_script
@@ -36195,6 +36387,8 @@ class SessionThreadUsage(BaseModel)
 
 [[view_source]](https://github.com/QoderAI/qoder-cloud-agents-sdk-python/blob/main/src/qca/managed/types/session_thread_usage.py)
 
+Deprecated legacy Token/list-cost usage; current Thread responses omit it.
+
 <a id="qca.managed.types.session_thread_usage.SessionThreadUsage.active_seconds"></a>
 
 #### active\_seconds
@@ -37967,6 +38161,10 @@ class Vault(BaseModel)
 
 [[view_source]](https://github.com/QoderAI/qoder-cloud-agents-sdk-python/blob/main/src/qca/managed/types/vault.py)
 
+<a id="qca.managed.types.vault.Vault.credentials"></a>
+
+#### credentials
+
 <a id="qca.managed.types.vault.Vault.id"></a>
 
 #### id
diff --git a/src/qca/forward/resources/sessions/sessions.py b/src/qca/forward/resources/sessions/sessions.py
index 0014e46..6d1e84a 100644
--- a/src/qca/forward/resources/sessions/sessions.py
+++ b/src/qca/forward/resources/sessions/sessions.py
@@ -14,6 +14,7 @@
 from qca.forward.resources.sessions.events import AsyncEvents, Events
 from qca.forward.resources.sessions.resources import AsyncResources, Resources
 from qca.forward.resources.sessions.threads.threads import AsyncThreads, Threads
+from qca.forward.types.budget_limit_param import BudgetLimitParam
 from qca.forward.types.session import Session
 from qca.forward.types.session_create_params_config_param import SessionCreateParamsConfigParam
 from qca.forward.types.session_resource_spec_param import SessionResourceSpecParam
@@ -96,6 +97,7 @@ def create(
         *,
         identity_id: str,
         template_id: str,
+        budget: Union[BudgetLimitParam, None, NotGiven] = NOT_GIVEN,
         title: Union[str, None, NotGiven] = NOT_GIVEN,
         metadata: Union[Dict[str, Any], None, NotGiven] = NOT_GIVEN,
         config: Union[SessionCreateParamsConfigParam, None, NotGiven] = NOT_GIVEN,
@@ -110,6 +112,7 @@ def create(
         _path = path_template("/sessions")
         options = make_request_options(
             body={
+                "budget": budget,
                 "identity_id": identity_id,
                 "template_id": template_id,
                 "title": title,
@@ -153,6 +156,7 @@ def update(
         self,
         session_id: str,
         *,
+        budget: Union[BudgetLimitParam, None, NotGiven] = NOT_GIVEN,
         title: Union[str, None, NotGiven] = NOT_GIVEN,
         metadata: Union[Dict[str, Any], None, NotGiven] = NOT_GIVEN,
         config: Union[SessionUpdateParamsConfigParam, None, NotGiven] = NOT_GIVEN,
@@ -165,7 +169,7 @@ def update(
         """POST /sessions/{session_id}."""
         _path = path_template("/sessions/{session_id}", session_id=session_id)
         options = make_request_options(
-            body={"title": title, "metadata": metadata, "config": config},
+            body={"budget": budget, "title": title, "metadata": metadata, "config": config},
             query={},
             headers={"Idempotency-Key": idempotency_key},
             extra_headers=extra_headers,
@@ -298,6 +302,7 @@ async def create(
         *,
         identity_id: str,
         template_id: str,
+        budget: Union[BudgetLimitParam, None, NotGiven] = NOT_GIVEN,
         title: Union[str, None, NotGiven] = NOT_GIVEN,
         metadata: Union[Dict[str, Any], None, NotGiven] = NOT_GIVEN,
         config: Union[SessionCreateParamsConfigParam, None, NotGiven] = NOT_GIVEN,
@@ -312,6 +317,7 @@ async def create(
         _path = path_template("/sessions")
         options = make_request_options(
             body={
+                "budget": budget,
                 "identity_id": identity_id,
                 "template_id": template_id,
                 "title": title,
@@ -355,6 +361,7 @@ async def update(
         self,
         session_id: str,
         *,
+        budget: Union[BudgetLimitParam, None, NotGiven] = NOT_GIVEN,
         title: Union[str, None, NotGiven] = NOT_GIVEN,
         metadata: Union[Dict[str, Any], None, NotGiven] = NOT_GIVEN,
         config: Union[SessionUpdateParamsConfigParam, None, NotGiven] = NOT_GIVEN,
@@ -367,7 +374,7 @@ async def update(
         """POST /sessions/{session_id}."""
         _path = path_template("/sessions/{session_id}", session_id=session_id)
         options = make_request_options(
-            body={"title": title, "metadata": metadata, "config": config},
+            body={"budget": budget, "title": title, "metadata": metadata, "config": config},
             query={},
             headers={"Idempotency-Key": idempotency_key},
             extra_headers=extra_headers,
diff --git a/src/qca/forward/types/__init__.py b/src/qca/forward/types/__init__.py
index 67e82bb..318d8d6 100644
--- a/src/qca/forward/types/__init__.py
+++ b/src/qca/forward/types/__init__.py
@@ -16,6 +16,8 @@
 from .batch_task_list_params import BatchTaskListParams as BatchTaskListParams
 from .batch_task_usage import BatchTaskUsage as BatchTaskUsage
 from .batch_usage import BatchUsage as BatchUsage
+from .budget_limit import BudgetLimit as BudgetLimit
+from .budget_limit_param import BudgetLimitParam as BudgetLimitParam
 from .channel import Channel as Channel
 from .channel_channel_config import ChannelChannelConfig as ChannelChannelConfig
 from .channel_channel_config_response_options import (
@@ -271,6 +273,8 @@
 from .template_update_params import TemplateUpdateParams as TemplateUpdateParams
 from .template_usage import TemplateUsage as TemplateUsage
 from .tool import Tool as Tool
+from .tool_approval_evaluation import ToolApprovalDecision as ToolApprovalDecision
+from .tool_approval_evaluation import ToolApprovalEvaluation as ToolApprovalEvaluation
 from .tool_config import ToolConfig as ToolConfig
 from .tool_config_param import ToolConfigParam as ToolConfigParam
 from .tool_override import ToolOverride as ToolOverride
diff --git a/src/qca/forward/types/budget_limit.py b/src/qca/forward/types/budget_limit.py
new file mode 100644
index 0000000..b8c257e
--- /dev/null
+++ b/src/qca/forward/types/budget_limit.py
@@ -0,0 +1,13 @@
+from __future__ import annotations
+
+from typing import Optional
+
+from qca.common._models import BaseModel
+
+__all__ = ["BudgetLimit"]
+
+
+class BudgetLimit(BaseModel):
+    # Positive decimal Credits, at most 12 integer and 2 fractional digits.
+    max_credit_cost: Optional[str] = None
+    type: Optional[str] = None
diff --git a/src/qca/forward/types/budget_limit_param.py b/src/qca/forward/types/budget_limit_param.py
new file mode 100644
index 0000000..8c1b439
--- /dev/null
+++ b/src/qca/forward/types/budget_limit_param.py
@@ -0,0 +1,13 @@
+from __future__ import annotations
+
+from typing import Literal
+
+from typing_extensions import Required, TypedDict
+
+__all__ = ["BudgetLimitParam"]
+
+
+class BudgetLimitParam(TypedDict, total=False):
+    # Positive decimal Credits, at most 12 integer and 2 fractional digits.
+    max_credit_cost: Required[str]
+    type: Required[Literal["limit"]]
diff --git a/src/qca/forward/types/environment_config.py b/src/qca/forward/types/environment_config.py
index be9fd92..62ab16d 100644
--- a/src/qca/forward/types/environment_config.py
+++ b/src/qca/forward/types/environment_config.py
@@ -11,6 +11,8 @@
 
 
 class EnvironmentConfig(BaseModel):
+    # Runs on start/resume; self-hosted execution depends on the worker.
+    startup_script: Optional[str] = None
     setup_script: Optional[str] = None
     type: Optional[str] = None
     packages: Optional[EnvironmentConfigPackages] = None
diff --git a/src/qca/forward/types/model_config.py b/src/qca/forward/types/model_config.py
index 23db2f0..841dff6 100644
--- a/src/qca/forward/types/model_config.py
+++ b/src/qca/forward/types/model_config.py
@@ -10,4 +10,5 @@
 class ModelConfig(BaseModel):
     id: Optional[str] = None
     effort: Optional[str] = None
+    speed: Optional[str] = None
     context_window: Optional[int] = None
diff --git a/src/qca/forward/types/model_config_param.py b/src/qca/forward/types/model_config_param.py
index a1d412a..ed720b8 100644
--- a/src/qca/forward/types/model_config_param.py
+++ b/src/qca/forward/types/model_config_param.py
@@ -10,4 +10,5 @@
 class ModelConfigParam(TypedDict, total=False):
     id: Required[str]
     effort: Optional[str]
+    speed: Optional[str]
     context_window: Optional[int]
diff --git a/src/qca/forward/types/session.py b/src/qca/forward/types/session.py
index f59f636..f70e403 100644
--- a/src/qca/forward/types/session.py
+++ b/src/qca/forward/types/session.py
@@ -6,6 +6,7 @@
 from qca.common._models import BaseModel
 
 if TYPE_CHECKING:
+    from .budget_limit import BudgetLimit
     from .session_config import SessionConfig
     from .session_outcome_evaluation import SessionOutcomeEvaluation
     from .session_resource import SessionResource
@@ -17,6 +18,7 @@
 
 
 class Session(BaseModel):
+    budget: Optional[BudgetLimit] = None
     outcome_evaluations: Optional[List[SessionOutcomeEvaluation]] = None
     id: Optional[str] = None
     type: Optional[str] = None
diff --git a/src/qca/forward/types/session_config.py b/src/qca/forward/types/session_config.py
index 76588f1..322c9e9 100644
--- a/src/qca/forward/types/session_config.py
+++ b/src/qca/forward/types/session_config.py
@@ -1,11 +1,14 @@
 from __future__ import annotations
 
-from typing import Dict, Optional
+from typing import Dict, Optional, Union
 
 from qca.common._models import BaseModel
 
+from .model_config import ModelConfig
+
 __all__ = ["SessionConfig"]
 
 
 class SessionConfig(BaseModel):
+    model: Optional[Union[str, ModelConfig]] = None
     environment_variables: Optional[Dict[str, str]] = None
diff --git a/src/qca/forward/types/session_create_params.py b/src/qca/forward/types/session_create_params.py
index bd326bb..0dcf7fa 100644
--- a/src/qca/forward/types/session_create_params.py
+++ b/src/qca/forward/types/session_create_params.py
@@ -5,6 +5,7 @@
 from typing_extensions import Required, TypedDict
 
 if TYPE_CHECKING:
+    from .budget_limit_param import BudgetLimitParam
     from .session_create_params_config_param import SessionCreateParamsConfigParam
     from .session_resource_spec_param import SessionResourceSpecParam
 
@@ -12,6 +13,8 @@
 
 
 class SessionCreateParams(TypedDict, total=False):
+    # Omit to keep the default/current budget; None clears it.
+    budget: Optional[BudgetLimitParam]
     identity_id: Required[str]
     template_id: Required[str]
     title: Optional[str]
diff --git a/src/qca/forward/types/session_create_params_config_param.py b/src/qca/forward/types/session_create_params_config_param.py
index da67012..630bc3c 100644
--- a/src/qca/forward/types/session_create_params_config_param.py
+++ b/src/qca/forward/types/session_create_params_config_param.py
@@ -1,11 +1,15 @@
 from __future__ import annotations
 
-from typing import Any, Dict
+from typing import Any, Dict, Union
 
 from typing_extensions import TypedDict
 
+from .model_config_param import ModelConfigParam
+
 __all__ = ["SessionCreateParamsConfigParam"]
 
 
 class SessionCreateParamsConfigParam(TypedDict, total=False):
+    # Omit on create to inherit; None on update restores inheritance.
+    model: Union[str, ModelConfigParam]
     environment_variables: Dict[str, Any]
diff --git a/src/qca/forward/types/session_event.py b/src/qca/forward/types/session_event.py
index 512d8cb..f16f0ac 100644
--- a/src/qca/forward/types/session_event.py
+++ b/src/qca/forward/types/session_event.py
@@ -5,12 +5,24 @@
 
 from qca.common._models import BaseModel
 
+from .budget_limit import BudgetLimit
 from .outcome_rubric import OutcomeRubric
+from .tool_approval_evaluation import ToolApprovalEvaluation
 
 __all__ = ["SessionEvent"]
 
 
 class SessionEvent(BaseModel):
+    evaluation: Optional[ToolApprovalEvaluation] = None
+    budget: Optional[BudgetLimit] = None
+    reason: Optional[str] = None
+    iteration: Optional[int] = None
+    explanation: Optional[str] = None
+    outcome_evaluation_start_id: Optional[str] = None
+    # Cumulative Credits: replace with the latest values, never sum successive events.
+    model_credits: Optional[float] = None
+    sandbox_runtime_credits: Optional[float] = None
+    total_credits: Optional[float] = None
     id: Optional[str] = None
     type: Optional[str] = None
     session_id: Optional[str] = None
diff --git a/src/qca/forward/types/session_update_params.py b/src/qca/forward/types/session_update_params.py
index b562acd..c0743b9 100644
--- a/src/qca/forward/types/session_update_params.py
+++ b/src/qca/forward/types/session_update_params.py
@@ -5,12 +5,15 @@
 from typing_extensions import TypedDict
 
 if TYPE_CHECKING:
+    from .budget_limit_param import BudgetLimitParam
     from .session_update_params_config_param import SessionUpdateParamsConfigParam
 
 __all__ = ["SessionUpdateParams"]
 
 
 class SessionUpdateParams(TypedDict, total=False):
+    # Omit to keep the default/current budget; None clears it.
+    budget: Optional[BudgetLimitParam]
     title: Optional[str]
     metadata: Dict[str, Any]
     config: SessionUpdateParamsConfigParam
diff --git a/src/qca/forward/types/session_update_params_config_param.py b/src/qca/forward/types/session_update_params_config_param.py
index 5f28183..eaabd6b 100644
--- a/src/qca/forward/types/session_update_params_config_param.py
+++ b/src/qca/forward/types/session_update_params_config_param.py
@@ -1,11 +1,15 @@
 from __future__ import annotations
 
-from typing import Any, Dict
+from typing import Any, Dict, Optional, Union
 
 from typing_extensions import TypedDict
 
+from .model_config_param import ModelConfigParam
+
 __all__ = ["SessionUpdateParamsConfigParam"]
 
 
 class SessionUpdateParamsConfigParam(TypedDict, total=False):
+    # Omit on create to inherit; None on update restores inheritance.
+    model: Optional[Union[str, ModelConfigParam]]
     environment_variables: Dict[str, Any]
diff --git a/src/qca/forward/types/tool_approval_evaluation.py b/src/qca/forward/types/tool_approval_evaluation.py
new file mode 100644
index 0000000..1591508
--- /dev/null
+++ b/src/qca/forward/types/tool_approval_evaluation.py
@@ -0,0 +1,21 @@
+from __future__ import annotations
+
+from typing import Optional
+
+from qca.common._models import BaseModel
+
+__all__ = ["ToolApprovalDecision", "ToolApprovalEvaluation"]
+
+
+class ToolApprovalDecision(BaseModel):
+    """Automatic decision; reason_code may be indeterminate or high_risk."""
+
+    type: Optional[str] = None
+    reason_code: Optional[str] = None
+
+
+class ToolApprovalEvaluation(BaseModel):
+    """Policy source (always_allow, always_ask, auto) and optional automatic decision."""
+
+    type: Optional[str] = None
+    evaluated_permission: Optional[ToolApprovalDecision] = None
diff --git a/src/qca/managed/types/cloud_config_params.py b/src/qca/managed/types/cloud_config_params.py
index 4cac283..c953fce 100644
--- a/src/qca/managed/types/cloud_config_params.py
+++ b/src/qca/managed/types/cloud_config_params.py
@@ -15,6 +15,8 @@
 
 class CloudConfigParams(TypedDict, total=False):
     storage: BucketStorageParam
+    # Runs on start/resume; self-hosted execution depends on the worker.
+    startup_script: Optional[str]
     setup_script: Optional[str]
     networking: Union[UnrestrictedNetworkParam, LimitedNetworkParams]
     packages: PackagesParams
diff --git a/src/qca/managed/types/environment_config_union.py b/src/qca/managed/types/environment_config_union.py
index 0df728f..f5a7bdc 100644
--- a/src/qca/managed/types/environment_config_union.py
+++ b/src/qca/managed/types/environment_config_union.py
@@ -14,6 +14,8 @@
 
 class EnvironmentConfigUnion(BaseModel):
     storage: Optional[BucketStorage] = None
+    # Runs on start/resume; self-hosted execution depends on the worker.
+    startup_script: Optional[str] = None
     setup_script: Optional[str] = None
     networking: Optional[CloudConfigNetworkingUnion] = None
     packages: Optional[Packages] = None
diff --git a/src/qca/managed/types/memory.py b/src/qca/managed/types/memory.py
index eb5e2b9..f9cb06b 100644
--- a/src/qca/managed/types/memory.py
+++ b/src/qca/managed/types/memory.py
@@ -9,6 +9,7 @@
 
 
 class Memory(BaseModel):
+    version: Optional[int] = None
     metadata: Optional[Dict[str, str]] = None
     id: Optional[str] = None
     content_sha256: Optional[str] = None
diff --git a/src/qca/managed/types/memory_list_item_union.py b/src/qca/managed/types/memory_list_item_union.py
index bcae6eb..73f5c5f 100644
--- a/src/qca/managed/types/memory_list_item_union.py
+++ b/src/qca/managed/types/memory_list_item_union.py
@@ -1,7 +1,7 @@
 from __future__ import annotations
 
 from datetime import datetime
-from typing import Optional
+from typing import Dict, Optional
 
 from qca.common._models import BaseModel
 
@@ -9,6 +9,8 @@
 
 
 class MemoryListItemUnion(BaseModel):
+    metadata: Optional[Dict[str, str]] = None
+    version: Optional[int] = None
     id: Optional[str] = None
     content_sha256: Optional[str] = None
     content_size_bytes: Optional[int] = None
diff --git a/src/qca/managed/types/memory_version.py b/src/qca/managed/types/memory_version.py
index a3d901e..b22dba1 100644
--- a/src/qca/managed/types/memory_version.py
+++ b/src/qca/managed/types/memory_version.py
@@ -12,6 +12,7 @@
 
 
 class MemoryVersion(BaseModel):
+    redacted: Optional[bool] = None
     id: Optional[str] = None
     created_at: Optional[datetime] = None
     memory_id: Optional[str] = None
diff --git a/src/qca/managed/types/self_hosted_config_params.py b/src/qca/managed/types/self_hosted_config_params.py
index f07f86d..1cd8127 100644
--- a/src/qca/managed/types/self_hosted_config_params.py
+++ b/src/qca/managed/types/self_hosted_config_params.py
@@ -8,5 +8,7 @@
 
 
 class SelfHostedConfigParams(TypedDict, total=False):
+    # Runs on start/resume; self-hosted execution depends on the worker.
+    startup_script: str
     setup_script: str
     type: Literal["self_hosted"]
diff --git a/src/qca/managed/types/session_thread.py b/src/qca/managed/types/session_thread.py
index cac2b3e..f22955f 100644
--- a/src/qca/managed/types/session_thread.py
+++ b/src/qca/managed/types/session_thread.py
@@ -3,6 +3,8 @@
 from datetime import datetime
 from typing import TYPE_CHECKING, Optional
 
+from pydantic import Field
+
 from qca.common._models import BaseModel
 
 if TYPE_CHECKING:
@@ -24,4 +26,6 @@ class SessionThread(BaseModel):
     status: Optional[str] = None
     type: Optional[str] = None
     updated_at: Optional[datetime] = None
-    usage: Optional[SessionThreadUsage] = None
+    usage: Optional[SessionThreadUsage] = Field(
+        default=None, deprecated="Current Thread responses omit usage; read Session Credits instead."
+    )
diff --git a/src/qca/managed/types/session_thread_usage.py b/src/qca/managed/types/session_thread_usage.py
index bd77980..b53692d 100644
--- a/src/qca/managed/types/session_thread_usage.py
+++ b/src/qca/managed/types/session_thread_usage.py
@@ -13,6 +13,8 @@
 
 
 class SessionThreadUsage(BaseModel):
+    """Deprecated legacy Token/list-cost usage; current Thread responses omit it."""
+
     active_seconds: Optional[float] = None
     cache_creation: Optional[CacheCreationUsage] = None
     cache_read_input_tokens: Optional[int] = None
diff --git a/src/qca/managed/types/vault.py b/src/qca/managed/types/vault.py
index c59abdf..387cd5c 100644
--- a/src/qca/managed/types/vault.py
+++ b/src/qca/managed/types/vault.py
@@ -1,14 +1,19 @@
 from __future__ import annotations
 
 from datetime import datetime
-from typing import Dict, Optional
+from typing import TYPE_CHECKING, Dict, List, Optional
 
 from qca.common._models import BaseModel
 
+if TYPE_CHECKING:
+    from .credential import Credential
+
 __all__ = ["Vault"]
 
 
 class Vault(BaseModel):
+    # Empty on creation. Use the separate Credential API to add credentials.
+    credentials: Optional[List[Credential]] = None
     id: Optional[str] = None
     archived_at: Optional[datetime] = None
     created_at: Optional[datetime] = None
diff --git a/tests/test_documentation_alignment.py b/tests/test_documentation_alignment.py
new file mode 100644
index 0000000..b1a0021
--- /dev/null
+++ b/tests/test_documentation_alignment.py
@@ -0,0 +1,194 @@
+"""Official Forward Session and Managed Memory/Environment/Vault schemas, 2026-11-03."""
+
+import inspect
+import json
+
+import httpx
+import pytest
+
+from qca import AsyncForward, Forward
+from qca.forward.types import SessionEvent
+from qca.managed.types import Memory, MemoryListItemUnion, MemoryVersion, SessionThread, Vault
+
+
+async def resolve(value):
+    return await value if inspect.isawaitable(value) else value
+
+
+@pytest.mark.parametrize("async_", [False, True])
+@pytest.mark.parametrize(
+    "body",
+    [
+        {},
+        {"budget": None, "config": {"model": None}},
+        {"budget": {"type": "limit", "max_credit_cost": "100.00"}, "config": {"model": "ultimate"}},
+        {"config": {"model": {"id": "ultimate", "speed": "high", "effort": "none", "context_window": 200000}}},
+    ],
+)
+async def test_forward_update_budget_and_model_three_states(async_, body):
+    def handle(request):
+        assert json.loads(request.content) == body
+        return httpx.Response(200, json={"id": "sess_test", **body})
+
+    http = (httpx.AsyncClient if async_ else httpx.Client)(transport=httpx.MockTransport(handle))
+    client = (AsyncForward if async_ else Forward)(pat="test", http_client=http, _strict_response_validation=True)
+    try:
+        session = await resolve(client.sessions.update("sess_test", **body))
+        assert ("budget" in session.model_fields_set) == ("budget" in body)
+        if body.get("budget"):
+            assert session.budget.max_credit_cost == "100.00"
+        if body.get("config", {}).get("model") is None:
+            if session.config:
+                assert session.config.model is None
+        elif isinstance(body["config"]["model"], str):
+            assert session.config.model == "ultimate"
+        else:
+            assert session.config.model.speed == "high"
+            assert "speed" in type(session.config.model).model_fields
+    finally:
+        await resolve(client.close())
+
+
+@pytest.mark.parametrize("async_", [False, True])
+@pytest.mark.parametrize("budget", [{"type": "limit", "max_credit_cost": "100.00"}, None])
+async def test_forward_create_keeps_budget_and_metadata(async_, budget):
+    metadata = {"business": "kept"}
+    config = {"model": {"id": "ultimate", "speed": "high"}}
+
+    def handle(request):
+        body = json.loads(request.content)
+        assert body["budget"] == budget
+        assert body["config"] == config
+        assert body["metadata"]["business"] == "kept"
+        assert body["metadata"]["__qca_sdk_created"] == "true"
+        return httpx.Response(200, json=body)
+
+    http = (httpx.AsyncClient if async_ else httpx.Client)(transport=httpx.MockTransport(handle))
+    client = (AsyncForward if async_ else Forward)(pat="test", http_client=http, _strict_response_validation=True)
+    try:
+        await resolve(
+            client.sessions.create(
+                identity_id="idn", template_id="tmpl", budget=budget, config=config, metadata=metadata
+            )
+        )
+        assert metadata == {"business": "kept"}
+    finally:
+        await resolve(client.close())
+
+
+@pytest.mark.parametrize(
+    "result,policy,reason",
+    [
+        ("allow", "always_allow", None),
+        ("ask", "always_ask", None),
+        ("allow", "auto", None),
+        ("ask", "auto", "indeterminate"),
+        ("deny", "auto", "high_risk"),
+    ],
+)
+def test_approval_root_and_nested_details(result, policy, reason):
+    evaluation = {"type": policy}
+    if policy == "auto":
+        evaluation["evaluated_permission"] = {"type": result}
+        if reason:
+            evaluation["evaluated_permission"]["reason_code"] = reason
+    event = SessionEvent.model_validate({"evaluated_permission": result, "evaluation": evaluation, "future": 17})
+    assert event.evaluated_permission == result
+    assert event.evaluation.type == policy
+    if policy == "auto":
+        assert event.evaluation.evaluated_permission.type == result
+        assert event.evaluation.evaluated_permission.reason_code == reason
+    else:
+        assert event.evaluation.evaluated_permission is None
+    assert event.model_extra == {"future": 17}
+
+
+@pytest.mark.parametrize("async_", [False, True])
+async def test_forward_history_and_both_streams_use_typed_event_fields(async_):
+    events = [
+        {"id": "zero", "type": "session.usage", "model_credits": 0, "sandbox_runtime_credits": 0, "total_credits": 0},
+        {
+            "id": "usage",
+            "type": "session.usage",
+            "model_credits": 0.68,
+            "sandbox_runtime_credits": 0.04,
+            "total_credits": 0.72,
+        },
+        {"id": "idle", "type": "session.status_idle", "reason": "outcome_evaluation"},
+        {
+            "id": "end",
+            "type": "span.outcome_evaluation_end",
+            "iteration": 2,
+            "explanation": "done",
+            "outcome_evaluation_start_id": "start",
+        },
+        {"id": "clear", "type": "session.updated", "budget": None},
+        {"id": "set", "type": "session.updated", "budget": {"type": "limit", "max_credit_cost": "0.01"}},
+    ]
+
+    def handle(request):
+        if request.url.path.endswith("/stream"):
+            return httpx.Response(
+                200,
+                text="".join(f"id: {e['id']}\ndata: {json.dumps(e)}\n\n" for e in events),
+                headers={"Content-Type": "text/event-stream"},
+            )
+        return httpx.Response(200, json={"data": events, "has_more": False})
+
+    def check(items):
+        assert items[0].total_credits == 0
+        assert items[1].total_credits == 0.72
+        assert items[1].model_credits == 0.68
+        assert items[1].sandbox_runtime_credits == 0.04
+        assert items[2].reason == "outcome_evaluation"
+        assert items[3].iteration == 2 and items[3].explanation == "done"
+        assert items[3].outcome_evaluation_start_id == "start"
+        assert items[4].budget is None and "budget" in items[4].model_fields_set
+        assert "budget" not in items[0].model_fields_set
+        assert items[5].budget.max_credit_cost == "0.01"
+        for item in items:
+            assert not item.model_extra
+
+    http = (httpx.AsyncClient if async_ else httpx.Client)(transport=httpx.MockTransport(handle))
+    client = (AsyncForward if async_ else Forward)(pat="test", http_client=http, _strict_response_validation=True)
+    try:
+        check((await resolve(client.sessions.events.list("s"))).data)
+        for stream in [
+            await resolve(client.sessions.events.stream("s")),
+            await resolve(client.sessions.threads.events.stream("t", session_id="s")),
+        ]:
+            try:
+                check([e async for e in stream] if async_ else list(stream))
+            finally:
+                await resolve(stream.close())
+    finally:
+        await resolve(client.close())
+
+
+def test_managed_memory_vault_and_legacy_usage():
+    payload = {"version": 2, "metadata": {"source": "test"}}
+    for model in [Memory, MemoryListItemUnion]:
+        item = model.model_validate(payload)
+        assert item.version == 2 and item.metadata == {"source": "test"}
+        assert not item.model_extra
+    for redacted in [False, True]:
+        version = MemoryVersion.model_validate({"operation": "updated", "redacted": redacted})
+        assert version.operation == "updated" and version.redacted is redacted
+        assert not version.model_extra
+    assert Vault.model_validate({"credentials": []}).credentials == []
+    assert "credentials" in Vault.model_fields
+    assert SessionThread.model_fields["usage"].deprecated
+    assert "usage" not in SessionThread.model_validate({"id": "t"}).model_fields_set
+
+
+def test_environment_startup_script_is_typed_and_preserved():
+    from qca.forward.types import EnvironmentConfig
+    from qca.managed.types import CloudConfigParams, EnvironmentConfigUnion, SelfHostedConfigParams
+
+    script = "#!/bin/sh\necho ready\n"
+    for model in [EnvironmentConfig, EnvironmentConfigUnion]:
+        config = model.model_validate({"type": "cloud", "startup_script": script})
+        assert config.startup_script == script
+        assert not config.model_extra
+    assert "startup_script" in CloudConfigParams.__annotations__
+    assert "startup_script" in SelfHostedConfigParams.__annotations__