Claude Code v0.2.64

Tool Call Counter

A new visual indicator that displays the number of tool calls being made during interactions. This can be enabled through the showToolCallCount configuration option, helping users track Claude's tool usage in real-time.

ULTRACLAUDE.md Support (Experimental)

Introduced experimental support for a new user preferences file called ULTRACLAUDE.md. This file:

• Lives in the .claude directory alongside other configuration files
• Provides critical user preferences that override default behavior
• Includes a warning when the file exceeds 1000 characters
• Can be edited using the /memory command

Example warning display:

⚠️ ULTRACLAUDE.md exceeds 1000 chars (1234 chars) • /memory to edit

Enhanced Permission Debug Info

New permission debugging display that shows detailed information about permission decisions:

• Rule-based decisions with their sources (CLI argument, local settings, or project settings)
• Mode information (Default, Accept Edits, or Bypass Permissions)
• Subcommand results with visual checkmarks (✓) or crosses (✗)
• Hierarchical display of permission decision reasons

Example output:

Permission debug info:
✓ read-file
  ⎿ allow rule from CLI argument
✗ write-file
  ⎿ Default mode

Enhanced Instruction System

• Updated the instruction preamble from "Codebase-specific instructions" to more authoritative language
• New critical user preferences reminder system that seamlessly injects user preferences into conversations
• Preferences are automatically appended to user messages without disrupting the conversation flow

️ Stream Processing Enhancement

The stream event handler now includes an optional callback for tool use detection, allowing the UI to respond immediately when Claude begins using tools.

New Utility Functions

• Added array utility functions for improved performance:
• includes() implementation with optimized search
• uniqBy() for removing duplicates with custom comparator
• Enhanced array searching with NaN handling

Import Reorganization

• Migrated from direct stream imports to named imports (PassThrough)
• Updated process and OS imports to use modern Node.js module syntax
• Better organization of platform-specific imports (EOL, platform, homedir)

• Fixed potential issues with instruction content injection by properly handling edge cases in message arrays
• Improved error handling for EACCES permission errors with better telemetry

New configuration option added to the animation settings:

{
  useHaiku: false,
  haikuInterval: 5,
  thinking: "default",
  responding: "default", 
  toolUse: "default",
  normal: "default",
  charAnimation: "none",
  showToolCallCount: false  // New option
}