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Claude Code

Anthropic · CLI

Claude Code 2.1.235

2.1.234→2.1.235·August 18, 2026 at 1:48 AM UTC

Patch release: richer document artifacts (block IDs, runtime capabilities/contract), clearer focus-mode and correction-memory behaviour, and assorted permission/session reliability fixes.

Changelog

  • [new] Document artifacts can declare runtime capabilities ({name: config}) and a contract (runtime version: omit to keep, latest to upgrade, or a specific version to pin/roll back). Load the artifact-capabilities skill before declaring capabilities; only change contract when the author intends a runtime change.
  • [changed] When editing an existing document artifact, preserve its toolbar, KIT: regions, and block ids — don’t reload the creation template over a live page.
  • [changed] Artifact comments stay pinned to block ids. Keep existing ids on edit (renaming or dropping one detaches that thread); don’t invent ids unless you need an in-page link target; when copying/duplicating a block, strip the id from the copy so threads don’t split.
  • [changed] Focus mode: the user only sees your final text each turn — not tool calls, tool results, or mid-turn progress lines. Put everything they need in the final message.
  • [changed] Corrections → memory: if the user corrects you or states a preference, write memory in the same turn you engage the correction (before the reply that explains, fixes, or offers a next step) — don’t wait for a later confirmation.
  • [changed] Long-session context management: when the conversation is summarized, the summary plus remaining context is what you continue from — no need to wrap up early or hand off mid-task.
  • [changed] Subagent guidance tightened: don’t spawn unless the user asks; don’t push synthesis onto subagents; never fabricate a pending agent’s results.
  • [fix] Faster/more reliable ack path for artifact comment threads.
  • [changed] Permission flow hardening: better handling of parked/unanswered permission prompts and related notify-hook behaviour.
  • [changed] Remote/session reliability: keepalives on remote send paths, plugin download stall handling, and device-bridge reannounce under contention.

Models & prompts

  • Built-in agent behaviour now calls out focus mode explicitly and steers mid-turn chatter out of the user-visible stream.
  • Correction handling is stricter about durable memory writes timed with the engaging reply, not deferred.
  • Document-artifact instructions cover comment-block identity and “edit in place” rules so threads and structure survive edits.
  • Stash safety, plan-mode freezes, Chrome-extension decline, and permission-denial wording remain in the agent instructions with small consistency cleanups.
  • Partial-conversation summarization prompts distinguish “recent tail only” vs full-session summaries for continued sessions.

Under the hood

  • New internal settings/flags for accessibility, auto-mode external permissions, bash-output audience notes, launch composer, workflow name-only paths, websocket auth via file descriptor, foundry resource wiring, and OAuth refresh when an account is on hold.
  • Feature gates added for parallel tool-result recovery, device-bridge reannounce (including contended cases), OAuth token refresh lifecycle, and refusal-fallback telemetry; tengu_cloth_snorkel removed.
  • Dropped unused backend routes for notification preferences and the legacy agent-proxy path.
  • SDK compatibility matrix no longer lists wrapper 0.3.196 among tested versions (0.3.197+ retained).
  • Platform binaries rebuilt for all supported OS/arch targets (version 2.1.235).

Upgrade notes

  • If you publish or update document artifacts with runtime behaviour, review the artifact-capabilities skill before setting capabilities, and pass contract only when you mean to change the runtime.
  • When editing commented artifacts, preserve block ids so existing comment threads stay attached.
  • In focus mode, expect only final assistant text in the UI; intermediate tool chatter is hidden by design.

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