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npm · #3768 most downloaded on npm
SDK for building AI agents with Claude Code's capabilities. Programmatically interact with Claude to build autonomous agents that can understand codebases, edit files, and execute workflows.
Last release today
19 Sep 2026
Ships on a steady schedule
a new release about every 8 days
Nearly every release is documented
notes for 60 of the last 60 stable releases
Nothing withdrawn
no release was ever pulled
11 months old
303 releases · first in 2025
Fixed a bug where Stop hooks would not consistently run due to Stream closed error
Stream closed errornpm install @anthropic-ai/claude-agent-sdk@0.1.73
# or
yarn add @anthropic-ai/claude-agent-sdk@0.1.73
# or
pnpm add @anthropic-ai/claude-agent-sdk@0.1.73
# or
bun add @anthropic-ai/claude-agent-sdk@0.1.73
Fixed /context command not respecting custom system prompts
/context command not respecting custom system promptsreceive() to stream() for consistency with Anthropic SDK patternsOne column per month.
Added zod ^4.0.0 as peer dependency option in addition to zod ^3.24.1
^4.0.0 as peer dependency option in addition to zod ^3.24.1tools option, enable by including 'AskUserQuestion' in listNothing published for this version
Updated to parity with Claude Code v2.0.69
Fixed a bug where disallowed MCP tools were visible to the model
Updated to parity with Claude Code v2.0.67
Fixed project MCP servers from .mcp.json not being available when settingSources includes project
.mcp.json not being available when settingSources includes projectUpdated to parity with Claude Code v2.0.66
Updated to parity with Claude Code v2.0.63
Nothing published for this version
Updated to parity with Claude Code v2.0.61
Updated to parity with Claude Code v2.0.60
Updated to parity with Claude Code v2.0.59
Updated to parity with Claude Code v2.0.58
betas option to enable beta features. Currently supports 'context-1m-2025-08-07' for 1M token context window on Sonnet 4/4.5. See https://platform.claude.com/docs/en/api/beta-headers for more details.Updated to parity with Claude Code v2.0.57
tools option to specify the exact set of built-in tools available to the agent. Use tools: ['Bash', 'Read', 'Edit'] for a strict allowlist, tools: [] to disable all built-in tools, or tools: { type: 'preset', preset: 'claude_code' } for all default tools. Omitting this option preserves existing behavior where all built-in tools are available (and can be filtered with disallowedTools).Updated to parity with Claude Code v2.0.56
Update to parity with Claude Code v2.0.55
Updated to parity with Claude Code v2.0.54
unstable_v2_createSession, unstable_v2_resumeSession, unstable_v2_prompt) for simpler multi-turn conversationsUpdated to parity with Claude Code v2.0.53
Updated to parity with Claude Code v2.0.52
Updated to parity with Claude Code v2.0.51
Updated to parity with Claude Code v2.0.50
Updated to parity with Claude Code v2.0.49
Updated to parity with Claude Code v2.0.47
error field to some messagesUpdated to parity with Claude Code v2.0.46
Add support for Microsoft Foundry! See https://code.claude.com/docs/en/azure-ai-foundry
Updated to parity with Claude Code v2.0.44
Updated to parity with Claude Code v2.0.43
Updated to parity with Claude Code v2.0.42
Updated to parity with Claude Code v2.0.41
Updated to parity with Claude Code v2.0.37
Updated to parity with Claude Code v2.0.36
Updated to parity with Claude Code v2.0.35
Updated to parity with Claude Code v2.0.34
Updated to parity with Claude Code v2.0.33
Updated to parity with Claude Code v2.0.32
Fixed a bug where hooks were sometimes failing in stream mode
Updated to parity with Claude Code v2.0.29
Updated to parity with Claude Code v2.0.28
MCP_TOOL_TIMEOUT (anthropics/claude-agent-sdk-typescript#42)Updated to parity with Claude Code v2.0.27
plugins field to OptionsUpdated to parity with Claude Code v2.0.26
Updated to parity with Claude Code v2.0.25
'project' settings source was specifiedskills field to SDKSystemMessage with list of available skillsNothing published for this version
Updated to parity with Claude Code v2.0.22
Updated to parity with Claude Code v2.0.21
Updated to parity with Claude Code v2.0.20
Updated to parity with Claude Code v2.0.19
Updated to parity with Claude Code v2.0.18
Updated to parity with Claude Code v2.0.17
Updated to parity with Claude Code v2.0.15
env type to not use Bun Dict typeUpdated to parity with Claude Code v2.0.14
Updated to parity with Claude Code v2.0.13
Updated to parity with Claude Code v2.0.12
Updated to parity with Claude Code v2.0.11
Updated to parity with Claude Code v2.0.10
Fixed a bug where system prompt was sometimes not getting set correctly: anthropics/claude-agent-sdk-typescript#8
Nothing published for this version
Nothing published for this version
Nothing published for this version
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