Moss

Structural code intelligence for humans and AI agents.

Moss provides tools for understanding, navigating, and modifying code at a structural level (AST, control flow, dependencies) rather than treating code as text.

Key Features

• 98 Languages - Tree-sitter grammars for comprehensive language support
• Structural Editing - AST-based code modifications with fuzzy matching
• Background Indexing - Daemon maintains symbol/call graph index
• Shadow Git - Hunk-level edit tracking in .moss/.git
• Session Analysis - Parse and analyze AI agent logs (Claude Code, Gemini CLI, etc.)

Three Primitives

Command	Purpose	Example
view	See structure	moss view src/ moss view MyClass
edit	Modify code	moss edit src/foo.rs/func --delete
analyze	Compute metrics	moss analyze --complexity

Quick Start

git clone https://github.com/rhizome-lab/moss
cd moss
cargo build --release

# View a file's structure
moss view src/main.rs

# Analyze codebase health
moss analyze --health

# Search for a symbol
moss view SkeletonExtractor

Relationship to Spore

Moss focuses on intelligence (code analysis, session parsing, understanding) while Spore handles agency/execution (LLM calls, memory, running agents). The projects are intentionally not hard-linked. Moss can optionally extend Spore via a plugin architecture.

Links

• GitHub
• Documentation