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Release Tue, Sep 29, 2026 2 min read

Claude Agent Sdk Typescript 0.3.285

Original release notes

What's changed

  • Added an optional read.title (the artifact's stored title) to the Artifact tool's structured read result
  • Added provider_not_allowed to startup_failure_reason and allowedProviders to the Settings type
  • Fixed sessions with CLAUDE_CODE_FORK_SUBAGENT=1: a subagent's own Agent call now runs in the foreground, so the subagent gets the child's result
  • Fixed getSessionMessages() leaving out a message sent while Claude was working when the process stopped before the reply, or when another prompt followed it with no reply in between
  • Fixed toggleMcpServer(name, false) leaving the connection open for a server that had not yet connected when the session started, or whose config was edited after it connected
  • Fixed rewind_conversation leaving a backgrounded MCP tool call running after the message that started it was removed
  • Changed Bash/PowerShell timeout to bound a run_in_background command (was ignored; default 30 min, max 2 h); the stopped task notification for a stop at that limit says why
  • Changed getSubagentMessages() to also return the messages a subagent read while it ran, such as a message sent to it; offset and limit count these rows
  • Updated to parity with Claude Code v2.1.285

Update

npm install @anthropic-ai/claude-agent-sdk@0.3.285
## or
yarn add @anthropic-ai/claude-agent-sdk@0.3.285
## or
pnpm add @anthropic-ai/claude-agent-sdk@0.3.285
## or
bun add @anthropic-ai/claude-agent-sdk@0.3.285