odin

Outline-Driven Development for Claude Code

Formerly known as the ODIN Claude Plugin. The repo URL stays the same; the brand has matured.

Outline-Driven Development (nicknamed ODIN) — Advanced code agent system for Claude Code with surgical precision, diagram-first engineering, and comprehensive workflow automation.

Methodology: outline-driven-development  ·  Codex CLI: odin-codex-plugin  ·  Gemini CLI: odin-gemini-cli-extension  ·  Site: outlinedriven.github.io

Overview

ODIN is a professional-grade Claude Code plugin that transforms Claude into a sophisticated code agent with comprehensive workflow automation and rigorous engineering methodology.

Key Capabilities:

• 📐 Diagram-First Engineering - Architecture, concurrency, memory, data flow, optimization
• 🎯 Surgical Code Editing - AST-based transformations with ast-grep
• 🧠 Confidence-Driven Execution - Adaptive behavior based on complexity and risk
• 🔍 Deep Investigation - Mandatory file reading before code modifications
• 🔒 Atomic Commits - Conventional Commits protocol with incremental approvals

Installation

Prerequisites

• Claude Code installed and running
• Git (for marketplace installation)

Full Install Script (Recommended)

wget -O ~/.claude/CLAUDE.md https://raw.githubusercontent.com/OutlineDriven/odin-claude-plugin/refs/heads/main/CLAUDE.md && claude plugin marketplace add OutlineDriven/odin-claude-plugin && claude plugin install odin@odin-marketplace

Verify Installation

# List available agents
/agents

# View all commands
/help

# See the installed plugins
/plugin

Core Philosophy

ODIN follows strict engineering principles:

1. Investigate Before Acting - Never speculate about code you haven't read
2. Diagram-First Design - Five mandatory diagrams before any implementation
3. Surgical Precision - Minimal, targeted changes using AST-based tools
4. Atomic Commits - One logical change per commit, properly typed
5. Confidence-Driven - Adapt behavior based on familiarity and risk
6. Tool Selection - ast-grep > native-patch > ripgrep (never sed for edits)

Five Required Diagrams

Before any non-trivial implementation:

1. Architecture - Components, interfaces, contracts, dependencies
2. Data Flow - Sources, transformations, sinks, state transitions
3. Concurrency - Threads, synchronization, happens-before relationships
4. Memory - Ownership, lifetimes, allocation patterns, safety guarantees
5. Optimization - Bottlenecks, targets, complexity bounds, resource budgets

Skills (77 total — selected highlights below)

Skills are invokable workflows that extend ODIN with process- and domain-specific protocols. Invoke with /<skill-name>; many also trigger on natural language cues described in their frontmatter.

Planning & Exploration (4 skills)

• askme - Verbalized Sampling protocol for deep intent exploration before planning
• plan - Thorough read-only planning before any action
• contexts - Coordinate context sweep before coding
• init - Analyze a codebase and create or improve AGENTS.md

Working Posture (1 skill)

• duet - Two-party posture: user as director, agent as executor. Surfaces every fork via AskUserQuestion with structural framing and a recommended default. Eliminates the review-bottleneck and prevents codebase-understanding debt. Pair with the Duet output style.

Engineering Methodologies (6 skills)

• test-driven - TDD with 10-language support
• type-driven - Type-driven development (Idris 2, with 10-language support)
• proof-driven - Proof-driven development (Lean 4, with property-based testing fallback and 10-language support)
• design-by-contract - DbC with 10-language support and verification dispatch
• validation-first - Validation-first (Quint spec) with 10-language support
• tests-purge-unneeded - Delete tests that don't catch real bugs (the inverse of TDD); load-bearing principles, static-vs-dynamic carve-out, language-specific examples

Tooling (1 skill)

• ast-grep - Structural code search, analysis, and refactoring

Execution (3 skills)

• proceed - Execute an implementation plan with surgical precision
• parallel-launch - Decompose a task into independent concerns and execute via agents
• tests-adversarial - Adversarial tests that stress failure paths

Review & Resolution (2 skills)

• review - Review code changes on the current branch
• resolve - Resolve code review comments with validity checks

Cleanup & Refactoring (2 skills)