Write once, use everywhere
Unified rule manager for Claude Code, Cursor, and Codex. 30+ rules installed, only the relevant ones loaded per prompt. No more wasted tokens.
Why ai-nexus?
30+ rules installed, only 2-3 loaded. One source of truth for every tool.
Before
Every tool has its own format. .claude/rules/*.md .cursor/rules/*.mdc .codex/AGENTS.md Same rules, maintained separately. Every prompt loads ALL of them.
After
Write once: config/rules/commit.md config/skills/react.md Deploy everywhere: Claude Code (semantic routing) Cursor (auto-converted .mdc) Codex (aggregated AGENTS.md) One source. Every tool in sync. Only relevant rules loaded.
Key Benefits
Concrete advantages that make a real difference
Load Only What You Need
Semantic Router picks only the relevant 2-3 rules per prompt instead of loading all 30+. Less noise means better AI responses and no wasted tokens. Powered by GPT-4o-mini or Claude Haiku for ~$0.50/month.
Write Once, Deploy Everywhere
Write a single .md rule. It auto-converts to .mdc for Cursor and AGENTS.md for Codex. No more copy-pasting across tools.
Team-Wide Consistency
Share rules via Git. Every team member installs from the same source. One update command keeps everyone in sync.
Your Edits Stay Safe
Install and update never overwrite your local customizations. Only new files are added. Your rules, your control.
Zero Config Setup
One command to install. Interactive wizard guides you through tool selection, rule categories, and templates. Works out of the box with keyword fallback.
Community Marketplace
Browse, search, install, and remove community rules from a local web UI. Contribute via PR — rules become available instantly after merge.
Supported Tools
One rule file, three tools — automatically
Claude Code
Cursor
Codex
Commands
Simple CLI for every workflow
ai-nexus install
Install rules globally (~/.claude/)
ai-nexus install -i
Interactive mode - choose tools & rules
ai-nexus init
Install in current project
ai-nexus update
Sync latest rules (respects local changes)
ai-nexus doctor
Diagnose installation issues
ai-nexus browse
Open rule marketplace in browser
ai-nexus search [keyword]
Search community rules from registry
ai-nexus test <prompt>
Preview which rules would load
Rule Marketplace
Browse, install, and manage rules from your browser
Stop wasting tokens. Load only what matters.
One command. 30+ built-in rules. Only the relevant ones loaded per prompt.