Anthropic SDK
Anthropic GitHub org activity, secondary feed for SDK + tooling releases that don't always land on the news page.
Release history
Anthropic Sdk Ruby 1.66.0
Adds thinking display mode beta, organization usage support, discriminated union module enums
Claude Code Action 1.0.206
Use paths in delete files prompt example; Allow parentheses in valid branch names; Bound download job log against a stalled log fetch
Claude Agent Sdk Typescript 0.3.246
Claude Agent SDK adds message tracing, cost basis reporting, managed pricing controls, and per-task interrupt handling for multi-agent workflows
Claude Agent Sdk Typescript 0.3.245
Claude Agent SDK TypeScript synced to Claude Code v2.1.245, tracking latest model capabilities for agent development
Claude Agent Sdk Typescript 0.3.241
Claude Agent SDK TypeScript now matches Claude Code v2.1.241 capabilities
Claude Code Action 1.0.199
Fixes GraphQL URL handling, MCP server initialization, and tool allowlist validation in GitHub Actions integration
Claude Agent Sdk Typescript 0.3.239
Claude Agent SDK now correctly applies US inference cost multipliers, fixes system prompt boundaries on multi-cloud providers, and improves background task visibility on reconnect
Anthropic Sdk Python 1.0.0
Breaking change: httpx2 upgrade requires dependency refresh
Claude Code Action 1.0.197
Fixed credential handling incompatibility with GitHub Actions checkout v6+ to prevent unintended credential exposure
Anthropic Sdk Java 2.55.0
Anthropic Java SDK adds files and memory store APIs, fixes message stream accumulation bugs, and upgrades build tooling to Gradle 9 and Kotlin 2.3
Claude Agent Sdk Typescript 0.3.234
Claude Agent SDK TypeScript adds ANTHROPIC_API_KEY source reporting, permission-class message delivery, effort-level tracking, and fixes unused type exports
Claude Code Action 1.0.192
Claude Code Action improves GitHub Actions pagination, preserves structured tool output, and detects binary files rather than extension
Anthropic Cli 1.23.0
Anthropic CLI adds output_behavior flag to dream creation for choosing between new memory store or in-place input update
Anthropic Sdk Ruby 1.62.0
Output behavior control for memory stores: create new or update in place. Bedrock now uses default-credentials hook
Anthropic Sdk Python 0.122.0
Adds output-behavior control for memory-store creation. Fixes async SigV4 signing in Bedrock clients
Claude Agent Sdk Typescript 0.3.229
SDK now exposes terminal slash commands to clients and properly surfaces request-body-size limits as API errors instead of image errors
Anthropic Sdk Go 1.63.0
Go SDK adds output_behavior control for dream memory creation, fixes agent toolset path handling and Vertex auth wrapping
Claude Agent Sdk Typescript 0.3.225
Fixed background subagents failing to resume after shell commands or monitors complete in headless SDK sessions
Claude Code 2.1.225
Claude Code 2.1.225 fixes OAuth token handling in headless sessions, MCP keychain timeouts, safety-filter retry loops, and Remote Control session resume breakage on large conversations
Anthropic Sdk Csharp 12.40.0
C# SDK adds mid-conversation tool changes, session budgets, advisor tools, and GitHub skill auto-loading for Claude API integration
Anthropic Sdk Typescript 0.116.0
Adds session budgets, mid-conversation tool changes beta, advisor tool, and pinned inference location
Anthropic Sdk Go 1.62.0
Adds session budgets, advisor tool, mid-conversation tool changes beta, and pinned inference location
Claude Code 2.1.224
Claude Code adds self-hosted environments, cross-session messaging, archive plugin installation, and sandbox credential-masking for Team/Enterprise users
Claude Code Action 1.0.185
Claude Code Action now derives trigger timestamps for events, pins bun config for MCP servers, matches downloaded images ID, and validates collaborator permissions for workflow runs
Claude Agent Sdk Typescript 0.3.222
Fixed resumed agent sessions not inheriting user settings like API keys, environment variables, hooks, and permissions
Claude Code 2.1.221
Claude Code 2.1.221 adds Focus view for cleaner chat UI, sandbox credential masking on Linux/WSL, permission-check security fixes for Bash and PowerShell, and MCP server connection reliability improvements
Claude Agent Sdk Typescript 0.3.221
Improved skills validation to reject malformed names, fixed external MCP servers not connecting before first turn preventing tool calls
Claude Code 2.1.219
Claude Opus 5 now default with 1M context, sandbox network allowlist controls added, nested subagent forwarding in stream-json, and various fixes for permission handling and UI state
Claude Agent Sdk Typescript 0.3.219
Adds interrupt cancellation, fast-mode diagnostics, directory lifecycle hooks, network allowlist controls, and workflow sizing guidance for agent orchestration
Anthropic Sdk Csharp 12.39.0
C# SDK adds Claude Opus 5 model, tool addition/removal blocks, tool_change events, and fixes streaming parallel tool-use logic
Claude Agent Sdk Python 0.2.126
SDK now surfaces query termination reasons and properly types model usage with provider identification for cross-provider model tracking
Claude Code Action 1.0.181
Claude Code Action now shares WIF credentials across spawned processes instead of creating duplicates
Anthropic Cli 1.19.0
Adds support for Managed Agents model effort, initial session events, threads delta streaming
Anthropic Sdk Csharp 12.37.0
C# SDK adds Managed Agents model effort controls, initial session events, and threads delta streaming support
Anthropic Sdk Typescript 0.113.0
Adds support for Managed Agents model effort, initial session events, threads delta streaming
Buffa 0.9.0
Changie fragment files adopted to end changelog merge conflicts. Codegen and struct evolution policy documented
Claude Agent Sdk Typescript 0.3.212
Fixed CLI argument parsing for session flags and added resolved model visibility in multi-model agent tool outputs
Claude Code 2.1.212
/fork separates conversation branches into background sessions, while /subtask replaces in-session subagents; Adds runaway-loop safeguards, long-running tool backgrounding, and session-resumption picker
Anthropic Sdk Java 2.49.0
Anthropic Java SDK adds dreaming and MCP Tunnels support, plus session delta accumulator for agent message previews
Anthropic Sdk Php 0.37.0
Anthropic PHP SDK adds dreaming and MCP Tunnels support, plus session delta accumulator for agent message previews
Claude Code Action 1.0.174
Claude Code Action now redacts GitHub user-to-server tokens from logs to prevent credential exposure
Claude Agent Sdk Typescript 0.3.210
Bash tool output now includes timedOutAfterMs field when commands are auto-backgrounded due to timeout
Claude Code 2.1.209
Fixed dialog blocking in Claude agents background sessions that prevented /model and other commands from executing
Claude Agent Sdk Python 0.2.116
Bundles Claude CLI 2.1.207; Fixes CI workspace trust for project-scoped permission grants
Claude Code 2.1.206
Claude Code adds directory suggestions to /cd, auto-confirms git pushes to configured remotes, fixes MCP timeouts and OAuth re-authentication, and improves agents view usability