# Claude Code v1.0.16

> Claude Code v1.0.16, released 6 Jun 2025 (2025-06-06). 9 entries read out of the shipped bundle. Unofficial, and not affiliated with Anthropic.

Web version: https://changelogs.core-directive.com/v/1.0.16

## Changes

# Claude Code v1.0.16 Changelog

### Plan Mode Support

- **New `ExitPlanMode` tool**: Users can now work in a "plan mode" where Claude Code presents implementation plans before executing them. When ready to proceed with coding, this tool prompts the user to exit plan mode.
- Example usage: After Claude Code presents a plan for implementing a feature, it will use this tool to get user approval before proceeding with the actual implementation.
- The plan parameter supports markdown formatting for clear, structured presentations.

### Non-Interactive Session Support

- **New session mode detection**: Claude Code can now detect and handle non-interactive sessions differently from interactive ones.
- Two new functions manage this state: `z0A()` to check if the session is non-interactive, and `w0A(A)` to set the non-interactive state.
- This affects API key authentication behavior - non-interactive sessions have different authentication requirements.

### Authentication and API Key Handling

- **Enhanced API key source detection**: The authentication check now considers whether the API key comes from `ANTHROPIC_API_KEY` environment variable or the `apiKeyHelper`.
- The `iP()` function (formerly `BV()`) now checks the source of authentication more granularly.
- Non-interactive sessions are handled differently in authentication flows.

### Cloud Provider Detection

- **Simplified cloud provider checks**: New `Hv()` function provides a cleaner way to detect if Claude Code is using AWS Bedrock or Google Vertex AI.
- Returns `true` if either `CLAUDE_CODE_USE_BEDROCK` or `CLAUDE_CODE_USE_VERTEX` environment variables are set.

### Token Limits and Management

- **Updated token limits**:
- Maximum token limit increased from 180,000 to 200,000 tokens
- New 20,000 token threshold introduced for certain operations
- New `Ow2()` function calculates remaining tokens available in the current context

### Performance

- **Optimized imports**: Streamlined import statements, using more specific imports like `{ cwd as dI0 }` and `{ PassThrough as uK5 }` instead of default imports.

## Internal Changes

- Added new constant `po1 = 3000` (likely a timeout or delay value)
- Removed unused `KfA()` function that checked authentication source
- Removed empty object schema `q75`
- Added `HA1` variable for internal module management

## Breaking Changes

None - this version maintains backward compatibility with v1.0.15.