Generates a JSON string representing this model as it would be received from or sent to the API (but with indentation). By default, fields th

A ``SessionMemoryStores`` with one store already downloaded to disk.

Ensure the memory root directory exists

Validate and resolve memory paths

Return the ``agent_toolset_20260401`` implementations bound to ``ctx``. The result is a plain list of :class:`~anthropic.lib.tools.BetaAsyncFunct

Remove the root iff ``open`` created it; pre-existing roots are kept.

Return headers derived from the config file (e.g. ``workspace_id``). Eagerly reads the config if not yet loaded. The returned dict is

Given a type like `Foo[T]`, returns the generic type variable `T`. This also handles the case where a concrete subclass is given, e.g. ```py

Service a single, already-claimed work item without the poll loop. Builds the per-session :class:`AgentToolContext` (workdir from this

Raise if only one of aws_access_key/aws_secret_key is provided.

A CUSTOM (user-defined) tool call — the agent emits ``agent.custom_tool_use`` rather than ``agent.tool_use`` for these.

Mock one deployment: its token endpoint mints ``token`` and its messages endpoint accepts anything. Pair with :func:`_requests_to` to check th

`httpx` objects don't work with `httpx2`, and would otherwise fail deep inside a request.

Workdir with two symlink cycles, a link that escapes, and a link whose target spells its way through a cycle to the escaping link.

Validate and resolve memory paths

Add one or more messages to the conversation history. This invalidates the cached tool response, i.e. if tools were already called, then they

Create a new client instance re-using the same options given to the current client with optional overriding.

Given a type like `APIResponse[T]`, returns the generic type variable `T`. This also handles the case where a concrete subclass is given, e.g.

Clear the cached token so the next :meth:`get_token` re-invokes the provider. Also sets a one-shot ``force_refresh`` flag so on-disk provider

Convert MCP resource contents to an Anthropic content block. Finds the first resource with a supported MIME type from the result's ``contents

The request-body form of a redeemed credit token — the object shape, best-effort mode.

Track a content_block_stop, shifting `event["index"]`.

A new client with the given middleware appended after this client's middleware. Convenience for applying extra middleware to a single request

A ``SessionMemoryStores`` with one store already downloaded to disk.

Pull a single item from a sync iterator; assert there was one.

Build a work-item ``secret`` the way the control plane does: URL-safe base64 of a JSON payload, without padding.

Return an ``httpx2.Client``, lazily creating (and tracking) one we own.

True only for the base ``Anthropic`` / ``AsyncAnthropic`` classes, not subclasses. Subclasses (``AnthropicAWS``, ``AnthropicFoundry``) have their

Read and cache the config file, resolving ``base_url`` and ``credentials_path``.

True if ``child`` is ``root`` or a path inside it (both already resolved).

Construct a BaseModel class without validation. This is useful for cases where you need to instantiate a `BaseModel` from an API response as

Create the root directory and any missing ancestors; already existing is fine.

Remove every store directory that :meth:`download` created. Pre-existing directories are left alone — that is :meth:`FileStore.dispos

Return the provider a client with ``base_url`` should exchange through. Binds in place, unless another client already bound this instance to

A fallback hop that contributes one text block, then refuses with a fresh token.

True for a 4xx that retrying will not fix (bad key, missing resource). Aligns with the core client's ``_should_retry`` policy: 408 / 409 / 429 ar

A byte-iterator over the decoded response content. This automatically handles gzip, deflate and brotli encoded responses.

List Files Args: ids: Restrict the result set to Files whose `id` is in this list. At most 100 entries (afte

A client with the default (non-strict) response validation. The fixture wire's terminal refusal delta self-reports a `{type: "message"}` iter

Convert an MCP tool to a sync runnable tool for ``tool_runner()``. Example:: from anthropic.lib.tools.mcp import mcp_tool tools

Pretty print an object to a string

Add a pydantic config for the given type. Note: this is a no-op on Pydantic v1.