# Claude Code v0.2.45

> Claude Code v0.2.45, released 15 Mar 2025 (2025-03-15). 4 entries read out of the shipped bundle. Unofficial, and not affiliated with Anthropic.

Web version: https://changelogs.core-directive.com/v/0.2.45

## Changes

# Claude Code v0.2.45 Changelog

### Environment Variable Support for API Customization

Claude Code now supports a new environment variable `CLAUDE_CODE_EXTRA_BODY` that allows users to inject additional parameters into API requests.

**Usage:**

`# Set custom API parameters as a JSON object export CLAUDE_CODE_EXTRA_BODY='{"temperature": 0.8, "max_tokens": 4000}' claude "Your prompt here"` This feature enables:

- Customization of API request parameters without modifying code
- Fine-tuning of Claude's response behavior (temperature, max tokens, etc.)
- Advanced users to experiment with API options

**Error Handling:**

- The value must be a valid JSON object (not an array or primitive)
- Invalid JSON will be logged to stderr and ignored
- Parsing errors are gracefully handled with descriptive error messages

### Import Optimizations

- Switched from default imports to named imports for better tree-shaking:
- `stream` module now uses `import { Readable as o$4 }`
- `node:process` module now uses `import { cwd as zw0 }`
- These changes may result in slightly smaller bundle sizes and improved load times

## Technical Details

The new `O41()` function handles the environment variable parsing:

`function O41() { let I = process.env.CLAUDE_CODE_EXTRA_BODY; if (!I) return {}; try { let G = wO(I); // JSON parse wrapper if (G && typeof G === "object" && !Array.isArray(G)) return G; return (console.error("CLAUDE_CODE_EXTRA_BODY must be a JSON object"), {}); } catch (G) { return ( console.error( `Error parsing CLAUDE_CODE_EXTRA_BODY: ${G instanceof Error ? G.message : String(G)}`, ), {} ); } }` This function is likely called during API request construction to merge custom parameters with default request bodies.