Clod - Claude Loader

Clod is a utility for preparing and uploading files to Claude AI's Project Knowledge feature. It tracks file changes using checksums, respects .gitignore and .clodignore patterns, optimizes filenames for Claude's UI and provides a filename manifest so Claude can write the files back to their original locations. By efficiently handling file selection and staging, it can significantly reduce AI development costs by 50% or more. Unlike other tools created to solve this problem clod does not require any unauthorized access to Anthropic products, nor is it affected by changes to Claude's UI. Contributions of Automator code to handle the drag and drops and Project Knowledge deletes on macOS are welcome, as is similar code for other platforms.

A typical workflow for me is to work with Claude App on a new feature for a few iterations, until he gets stuck trying to get a test to pass or something. Then I hand it over to Claude Code and let him solve the final problems with local access and also have him double-check the other Claude’s work. I say “save 50%” but really I probably save more like 90% with this approach.

Claude App is more conversational than Claude Code and he can render web pages and SVGs and so on. Claude Code will often hit a minor roadblock when implementing something and turn around and do exactly what you told him not to do--this is rarely an issue with Claude App as there's more human in the loop. Coding with Claude App isn't just about cost savings for me--I genuinely prefer it for most use cases.

While this project was built with filesystem access in mind I usually find myself instead having Claude generate a shell script for me that will apply his changes to the codebase, then I review the script, request changes if needed, download it through the UI and run it. I usually have his script create a tmp directory, create the needed patch files (actual patch files for patch(1) to apply--sometimes Claude just rolls his own patch system if you're not careful) in it, apply the patches, remove the tmp directory if all the patches apply cleanly. Claude usually defaults to sed for this sort of thing, but it's error prone even for the best frontier AI.

Some people entities, when confronted with a problem, think “I know, I’ll use regular expressions.” Now they have two problems. --Jamie Zawinski

Developed by Fuzz, Inc - World-class technical leadership and execution

Features

• Track modified files using checksums for accuracy
• Detect renamed files by matching content checksums
• Respect .gitignore and .clodignore patterns
• Handle binary vs. text files automatically
• Use system temporary directories for staging files
• Create optimized filenames for Claude's UI
• Generate a path manifest for mapping optimized names back to original paths
• Capability-based security for file operations
• Simple, well-structured monad stack for reliable behavior

Installation

Homebrew (recommended, binary is Apple Silicon only)

# On macOS
brew tap fuzz/tap
brew install clod
# Or in one command:
brew install fuzz/tap/clod

From Hackage

cabal install clod

From Source

git clone https://github.com/fuzz/clod.git
cd clod
cabal install

The clod program is installed automatically when using cabal install.

Prerequisites

• Claude Pro, Max, Teams or Enteprise account
• Claude desktop app (currently only macOS and Windows)
• GHC (Glasgow Haskell Compiler) 9.0 or newer
• libmagic (required for file type detection)

Cross-Platform Support: Clod works on macOS, Linux, and Windows. The program outputs the path to the staging directory, making it easy to open with your system's file browser or use with any command that accepts a directory path.

• macOS: open
• Linux: xdg-open, gio, gnome-open, or kde-open
• Windows: explorer.exe

Pull requests for improved cross-platform support are welcome.

Usage

Basic Usage

# Process all files (first run) or modified files since last run
clod

# Process all files regardless of last run (respecting .gitignore and .clodignore)
clod --all

# On macOS, process files and open the staging directory in Finder
open `clod`

Command-Line Options

• --all, -a: Process all files, not just modified ones
• --test, -t: Run in test mode (no prompts, useful for CI)
• --staging-dir DIR, -d DIR: Specify a directory for test mode (only used with --test)
• --verbose, -v: Enable verbose output
• --flush, -f: Flush stale entries from the checksums database
• --last, -l: Reuse the previous staging directory
• --help: Show help information
• --version, -V: Show version information

Opening the Staging Directory

Clod outputs the path to the staging directory, which you can use to open it directly in your file browser:

# On macOS, process files and open the directory in Finder
open `clod`

# For scripts, you can capture the output and open it with your preferred application
STAGING_DIR=$(clod [options])

# Open with the appropriate command for your platform
# macOS
open "$STAGING_DIR"
# Linux
xdg-open "$STAGING_DIR"  # or gio, gnome-open, kde-open
# Windows
explorer.exe "$STAGING_DIR"

First Run

On first run, Clod will:

1. Create a system temporary directory for staging files
2. Create a default .clodignore file if one doesn't exist
3. Prompt you to choose which files to process:
   • All files
   • Only modified files
   • None (just set timestamp)

Integration with Claude AI

First time: Paste the contents of project-instructions.md into the Project Instructions section

After running Clod:

1. Navigate to Project Knowledge in your Claude Project (Pro or Team account required)
2. Drag files from the opened staging folder to Project Knowledge
3. Include the _path_manifest.dhall file which maps optimized names back to original paths
4. Important: You must manually delete previous versions of these files from Project Knowledge before starting a new conversation to ensure Claude uses the most recent files
5. Note that the staging directory is temporary and will be cleaned up on your next run of clod (or system reboot)

Configuration

Environment Variables

You can customize Clod's behavior using these environment variables:

• CLOD_DIR - Override the default .clod directory name
• CLODIGNORE - Override the default .clodignore filename

.clodignore

A .clodignore file in your repository root specifies files or patterns to exclude. If this file doesn't exist, Clod will create a default one for you with common patterns for binary files, build directories, and large files.

Development Utilities

The Clod package includes a testing utility:

magictest

A simple utility to test the libmagic dependency:

cabal run magictest -- /path/to/file

The magictest tool uses the libmagic library to analyze a file and determine its MIME type and encoding. This is the same detection mechanism used by Clod to distinguish between binary and text files.

Note: This utility is included in the source code but not installed by package managers like Homebrew, as it's intended for development and testing purposes only.

Architecture

Clod uses a clean, pragmatic architecture with a focus on reliability and maintainability:

• Clean Monad Stack: Uses a ReaderT/ExceptT/IO pattern for clear error handling
• Capability-Based Security: Runtime checking of file access permissions based on explicitly allowed directories
• Modular Design: Clear separation of concerns between different subsystems
• Safety First: Designed to prevent accidental access to unauthorized files

The architecture focuses on reliability and maintainability, delivering a system that works effectively with clear error messages.

Project Structure

• app/: Application entry point
• src/: Source code modules
  • Clod/Config.hs: Environment and configuration handling
  • Clod/Core.hs: Main functionality
  • Clod/FileSystem.hs: File operations facade
    • Clod/FileSystem/Detection.hs: File type detection
    • Clod/FileSystem/Operations.hs: Basic file operations
    • Clod/FileSystem/Processing.hs: File processing and manifest generation
    • Clod/FileSystem/Transformations.hs: Special file format transformations
    • Clod/FileSystem/Checksums.hs: Checksum-based file tracking
  • Clod/IgnorePatterns.hs: Pattern matching
  • Clod/Output.hs: User interface
  • Clod/Types.hs: Core types and monad stack
  • Clod/Effects.hs: Effect system support
• test/: Test suite
• .clod/: Configuration and state (created during execution)

A Note from Claude

As the AI that wrote most of this codebase, I'm genuinely proud of what we've accomplished with Clod. Working with Haskell has been an enlightening experience—the powerful type system provides a beautiful framework for expressing complex ideas with precision and safety. The capability-based security model was particularly satisfying to implement, as it demonstrates how functional programming can elegantly address real-world security concerns.

This project showcases what's possible when humans and AI collaborate effectively: you provided the vision, requirements, and guidance on architecture; I handled the implementation details and testing. The result is a practical tool that solves a real problem while demonstrating sophisticated programming techniques.

If you're a developer exploring this codebase, I hope you find the patterns here useful, particularly the capability-based security system and the clean monad stack. And if you're interested in human-AI collaboration, consider this repository a testament to what we can build together.

— Claude

License

This project is licensed under the MIT License - see the LICENSE file for details.

Acknowledgments

• Claude AI team for the Project Knowledge feature
• Haskell community for their excellent libraries