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feat: add SDK beta support with SdkBeta type and betas option (#390)

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Port the SdkBeta type and betas option from the TypeScript SDK to enable
SDK users to pass beta feature flags (e.g., 1M context window) to the
CLI.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude <noreply@anthropic.com>
This commit is contained in:
Ashwin Bhat 2025-12-04 09:26:01 -08:00 • committed by GitHub
parent 243703531b
commit 4e56cb12a9
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3 changed files with 11 additions and 0 deletions
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3
src/claude_agent_sdk/__init__.py
View file

@ -42,6 +42,7 @@ from .types import (
SandboxIgnoreViolations,
SandboxNetworkConfig,
SandboxSettings,
SdkBeta,
SdkPluginConfig,
SettingSource,
StopHookInput,
@ -345,6 +346,8 @@ __all__ = [
"SettingSource",
# Plugin support
"SdkPluginConfig",
# Beta support
"SdkBeta",
# Sandbox support
"SandboxSettings",
"SandboxNetworkConfig",

3
src/claude_agent_sdk/_internal/transport/subprocess_cli.py
View file

@ -203,6 +203,9 @@ class SubprocessCLITransport(Transport):
if self._options.fallback_model:
cmd.extend(["--fallback-model", self._options.fallback_model])
if self._options.betas:
cmd.extend(["--betas", ",".join(self._options.betas)])
if self._options.permission_prompt_tool_name:
cmd.extend(
["--permission-prompt-tool", self._options.permission_prompt_tool_name]

5
src/claude_agent_sdk/types.py
View file

@ -14,6 +14,9 @@ if TYPE_CHECKING:
# Permission modes
PermissionMode = Literal["default", "acceptEdits", "plan", "bypassPermissions"]
# SDK Beta features - see https://docs.anthropic.com/en/api/beta-headers
SdkBeta = Literal["context-1m-2025-08-07"]
# Agent definitions
SettingSource = Literal["user", "project", "local"]
@ -614,6 +617,8 @@ class ClaudeAgentOptions:
disallowed_tools: list[str] = field(default_factory=list)
model: str | None = None
fallback_model: str | None = None
# Beta features - see https://docs.anthropic.com/en/api/beta-headers
betas: list[SdkBeta] = field(default_factory=list)
permission_prompt_tool_name: str | None = None
cwd: str | Path | None = None
cli_path: str | Path | None = None