Version 2.0.24

What: When sandboxing is enabled and you're in "accept edits" mode, safe bash commands now execute automatically without permission prompts.

How to use:

# Enable the sandbox with auto-allow feature
claude --configure
# Select "Sandbox BashTool, with auto-allow in accept edits mode"

# Now when you ask Claude to create files/directories, commands like
# mkdir, touch, mv, cp execute automatically when sandboxed

Details:

• Only activates when all conditions are met: sandbox enabled, auto-allow feature enabled, command is sandboxable, and user is in "acceptEdits" mode
• Safe commands like mkdir, touch, rm, rmdir, mv, cp, sed are pre-approved in acceptEdits mode
• User-defined deny/ask rules are still respected
• Commands can be excluded via sandbox.excludedCommands configuration
• Falls back to standard permission prompting if conditions aren't met
• Evidence: hL0() function at lines 206586-206604 and TN6() decision logic at line 206562 in pretty-v2.0.24.js

What: Keyboard event handlers can now stop event propagation to other handlers using event.stopImmediatePropagation().

How to use:

// For developers building on Claude Code's UI framework
useInput((input, key, event) => {
  if (input === 'q' && shouldQuit) {
    event.stopImmediatePropagation();  // Prevent other handlers from running
    handleQuit();
  }
});

Details:

• Third parameter added to keyboard event handlers containing the event object
• Enables priority-based event handling for modal dialogs, focus management, and vim-mode implementations
• Backward compatible - existing handlers with 2 parameters continue to work
• Implements DOM-style event propagation patterns
• Evidence: New VO1 event class at line 71066, B11 base class with stopImmediatePropagation() at line 69922, and updated callback signature in QT9() at line 71693 in pretty-v2.0.24.js

What: When using AWS Bedrock, credentials are now validated and refreshed automatically at startup.

How to use:

# Configure custom AWS auth commands in ~/.claude.json
{
  "awsAuthRefresh": "aws sso login --profile my-profile",
  "awsCredentialExport": "aws configure export-credentials --profile my-profile"
}

# Or skip auto-initialization if not needed
export CLAUDE_CODE_SKIP_BEDROCK_AUTH=1
claude

Details:

• Runs at startup when CLAUDE_CODE_USE_BEDROCK is set and CLAUDE_CODE_SKIP_BEDROCK_AUTH is not set
• First attempts standard AWS SDK authentication via STS GetCallerIdentity
• Falls back to custom awsAuthRefresh or awsCredentialExport commands if needed
• Includes workspace trust checks before executing custom commands
• Provides visual authentication feedback
• Evidence: New uhQ() initialization function at line 465179, called during startup at line 475285 in pretty-v2.0.24.js

Haiku 4.5 (claude-haiku-4-5-20251001) can now generate responses up to 32,000 tokens instead of being capped at 8,192 tokens. Claude 3.5 Haiku remains at 8,192 tokens.

Removed if (A.includes("haiku")) return 8192; from ox0() function at line 458119 in pretty-v2.0.24.js

Changelog fetching is now skipped in non-interactive sessions (SDK usage, --print mode, non-TTY environments), reducing unnecessary network traffic during programmatic usage.

Added if (I3()) return; check in zc0() function at line 392135 in pretty-v2.0.24.js

Path resolution now correctly handles glob patterns (*, ?, [, ]) in sandbox file access rules, preventing errors when specifying pattern-based access controls.

New XP() glob detector at line 206943 and early-return check in IP() at line 206957 in pretty-v2.0.24.js

Pro plan users may be assigned to experiments that change default model selection:

• Haiku default: Some Pro users may see Haiku 4.5 as default instead of Sonnet 4.5 (cost optimization)
• Sonnet 1M default: Users with 1M context access may default to Sonnet 4.5 [1M] instead of [200K]

These are A/B tests controlled by feature flags and not visible to all users.

New functions r_1() at line 144169 and QH0() at line 144180 in pretty-v2.0.24.js

Added telemetry for tool_use/tool_result mismatch errors to help engineers debug message normalization issues. This internal tracking does not affect user experience but helps improve reliability.

New Uw6() diagnostic function at line 203566 in pretty-v2.0.24.js