Sourced from @​anthropic-ai/claude-agent-sdk's releases.

v0.3.210

What's changed

• Added timedOutAfterMs to BashToolOutput, set when a command is auto-backgrounded on timeout

Update

npm install @anthropic-ai/claude-agent-sdk@0.3.210
# or
yarn add @anthropic-ai/claude-agent-sdk@0.3.210
# or
pnpm add @anthropic-ai/claude-agent-sdk@0.3.210
# or
bun add @anthropic-ai/claude-agent-sdk@0.3.210

v0.3.209

What's changed

• Updated to parity with Claude Code v2.1.209

Update

npm install @anthropic-ai/claude-agent-sdk@0.3.209
# or
yarn add @anthropic-ai/claude-agent-sdk@0.3.209
# or
pnpm add @anthropic-ai/claude-agent-sdk@0.3.209
# or
bun add @anthropic-ai/claude-agent-sdk@0.3.209

v0.3.208

What's changed

• Fixed a caller abort during a pending SDK hook callback being converted into hook success, which let PreToolUse-gated tools execute after the abort
• Fixed a per-query resource leak in the SDK's process tracking when spawning the CLI fails (nonexistent or inaccessible executable path)
• Fixed an SDK UserPromptSubmit hook callback exceeding its timeout killing the entire query with an empty error; it now blocks the prompt with a clear timeout message and the session continues
• Fixed extraArgs values that look like flags (e.g. resume: '--version') being parsed as their own CLI flags; dash-leading values are now bound with equals-form argv
• Fixed an abort-listener leak: streaming queries sharing one AbortController no longer accumulate abort listeners on its signal after each completed query
• Fixed createSdkMcpServer docs pointing at a nonexistent env var; the MCP tool-call timeout knob is MCP_TOOL_TIMEOUT
• Fixed an uncaught exception when writing to stdin after the Claude Code subprocess has exited

Update

npm install @anthropic-ai/claude-agent-sdk@0.3.208
# or
</tr></table> 

... (truncated)

Sourced from @​anthropic-ai/claude-agent-sdk's changelog.

0.3.210

• Added timedOutAfterMs to BashToolOutput, set when a command is auto-backgrounded on timeout

0.3.209

• Updated to parity with Claude Code v2.1.209

0.3.208

• Fixed a caller abort during a pending SDK hook callback being converted into hook success, which let PreToolUse-gated tools execute after the abort
• Fixed a per-query resource leak in the SDK's process tracking when spawning the CLI fails (nonexistent or inaccessible executable path)
• Fixed an SDK UserPromptSubmit hook callback exceeding its timeout killing the entire query with an empty error; it now blocks the prompt with a clear timeout message and the session continues
• Fixed extraArgs values that look like flags (e.g. resume: '--version') being parsed as their own CLI flags; dash-leading values are now bound with equals-form argv
• Fixed an abort-listener leak: streaming queries sharing one AbortController no longer accumulate abort listeners on its signal after each completed query
• Fixed createSdkMcpServer docs pointing at a nonexistent env var; the MCP tool-call timeout knob is MCP_TOOL_TIMEOUT
• Fixed an uncaught exception when writing to stdin after the Claude Code subprocess has exited

0.3.207

• Fixed canUseTool returning {behavior: 'allow'} without updatedInput being rejected as a deny with a raw ZodError message; the tool now runs with the original input per the documented contract
• The Agent tool's structured result now has a published SDK type (AgentToolCompletedOutput) that matches the emitted object exactly

0.3.206

• Added command_lifecycle frames to stream-json and SDK sessions, reporting each uuid-stamped message's terminal state (queued/started/completed/cancelled/discarded); zero-API results no longer report stale duration_api_ms

0.3.205

• Interrupt control responses now include still_queued (UUIDs of queued async messages that will still run), Query.interrupt() returns the typed receipt, and system/init advertises an interrupt_receipt_v1 capability for feature detection
• Added structured name and body fields to peer-message session events, exposing the sender display name and decoded message body

0.3.204

• Added terminal_reason values tool_deferred_unavailable (deferred tool resume found the tool gone — previously an is_error result with no reason, read as a clean completion by lifecycle sweeps) and turn_setup_failed (the turn-input builder threw before the turn started). Both classify as dead turns, so commands consumed by them report command_lifecycle state cancelled
• Fixed the post-merge cancel backstop cancelling every member of a coalesced prompt batch when a cancel named only one: uncancelled siblings now re-merge and run (previously they were reported cancelled — on remote transports that acknowledged them as processed, silently dropping messages nobody cancelled)
• Added terminal_reason values api_error, malformed_tool_use_exhausted, budget_exhausted, and structured_output_retry_exhausted. Turns that die on an exhausted-API-retry or malformed-tool-use give-up previously reported completed; budget and structured-output exhaustion results previously omitted terminal_reason. Commands consumed by such turns now report command_lifecycle state cancelled instead of completed (dup-over-loss)
• Updated to parity with Claude Code v2.1.204

0.3.203

• Added a background_tasks_changed system message with the full set of live background tasks on every membership change, so consumers can track background activity as a level instead of pairing task_started/task_notification edges
• Fixed stable releases shipping a sdk.d.ts with unresolved type references that broke consumer typechecking with skipLibCheck disabled

0.3.202

• Added parent_agent_id field to subagent session messages for building depth-2+ agent trees from disk-persisted metadata
• Fixed apply_flag_settings with a non-object settings value crashing the session instead of returning a control error

0.3.201

... (truncated)

• 018efaa chore: Update CHANGELOG.md
• d9eca20 chore: Update CHANGELOG.md
• 34426a1 Escape untrusted issue fields in the Slack notification workflow (#375)
• 96e19a5 chore: Update CHANGELOG.md
• 02b0475 chore: Update CHANGELOG.md
• 79b6350 chore: Update CHANGELOG.md
• 9fc7ea5 chore: Update CHANGELOG.md
• 95e94bf chore: Update CHANGELOG.md
• 0aed196 chore: Update CHANGELOG.md
• 7feb85d chore: Update CHANGELOG.md
• Additional commits viewable in compare view