Can I use xcsift with Swift Package Manager?

Yes, xcsift is fully compatible with 'swift build' and 'swift test' commands in addition to standard 'xcodebuild' workflows.

Is xcsift suitable for CI/CD environments?

Absolutely. With flags like -W (fail on warnings) and -E (exit on build failure), it is built to handle automated validation in professional pipelines.

How does xcsift improve my Claude Code experience?

It parses massive, text-heavy Xcode build logs into a compact, structured format called TOON. This prevents Claude from hitting context limits and helps it identify the exact line and cause of build errors more reliably.

Why should I use the TOON format instead of standard JSON?

TOON (Token Optimized Output Notation) is specifically designed to use 30-60% fewer tokens than standard JSON or raw logs, making it the most cost-effective way to pass build data to LLMs.

Does xcsift support code coverage reporting?

Yes, by using the -c flag, xcsift can extract and format code coverage data from your test runs for the AI agent to analyze.

Xcode Build Formatter (xcsift)

Name: Xcode Build Formatter (xcsift)
Author: ldomaradzki

byldomaradzki

•

238

Mobile Development

Transforms verbose Xcode and Swift build outputs into token-efficient structured data for AI coding agents.

About

xcsift is a specialized Swift command-line utility designed to bridge the gap between verbose Apple development logs and AI-driven development workflows. By transforming raw xcodebuild and Swift Package Manager (SPM) output into the structured TOON format, it reduces token consumption by 30-60%, allowing Claude and other agents to process build errors, warnings, and test results with significantly higher accuracy and lower cost. It is an essential tool for developers using AI to debug, test, and maintain iOS and macOS applications.

Key Features

Includes strict CI mode flags for automated build validation and error handling
Reduces token usage by up to 60% for faster AI processing
Extracts detailed error messages, warnings, and code coverage data
Supports both Xcode projects and Swift Package Manager (SPM) commands
Converts verbose xcodebuild logs into token-efficient TOON format
238 GitHub stars

Use Cases

Automating code coverage analysis and reporting within AI-driven development loops
Debugging complex Swift build failures using Claude Code with minimal token overhead
Integrating structured, machine-readable build feedback into CI/CD pipelines for Apple platforms

About

Key Features

Includes strict CI mode flags for automated build validation and error handling
Reduces token usage by up to 60% for faster AI processing
Extracts detailed error messages, warnings, and code coverage data
Supports both Xcode projects and Swift Package Manager (SPM) commands
Converts verbose xcodebuild logs into token-efficient TOON format
238 GitHub stars

Use Cases

Automating code coverage analysis and reporting within AI-driven development loops
Debugging complex Swift build failures using Claude Code with minimal token overhead
Integrating structured, machine-readable build feedback into CI/CD pipelines for Apple platforms