The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor and beyond.
Leantoken
Code intelligence for agents: find the code that matters and keep your context window and tokens lean.
Install
$
npx leantoken setupClaude Code
claude mcp add leantoken -- npx leantoken setupCursor / Claude Desktop (mcp.json)
{
"mcpServers": {
"leantoken": {
"command": "npx",
"args": [
"leantoken",
"setup"
]
}
}
}Install command taken from the project's README or registry entry. Always review code before running it.
README excerpt
Read full README on GitHub →LeanToken
Code intelligence for agents: find the code that matters and keep your context window and tokens lean.
Language: English · 简体中文 · 日本語 · 한국어
- MCP Registry name:
mcp-name: io.github.morluto/leantoken
Install · Why LeanToken · Tools · CLI · How it works · Docs
Measured token savings: In a controlled 60-run study, LeanToken used 20.1% fewer model input tokens than the agent's built-in tools with limited repository exploration, and 37.6% fewer than those tools with broad exploration. See exactly how it was measured in the measurement methodology.
Quick start
Add LeanToken to Claude Code, Cursor, OpenCode, Codex, Gemini CLI, or Antigravity:
npx leantoken setup
Setup behavior and safety
Current releases stop setup before writing when npx resolves a stale
project-local or ancestor install, and point to
npx leantoken@latest setup. Older releases that predate this check can be
bootstrapped directly with that versioned command.
The interactive setup wizard preselects supported clients it detects; you can change that selection before continuing. It then shows the exact configuration paths and MCP launcher and asks for a separate final confirmation. Automation never treats detection as consent. An npx-based setup pins the exact LeanToken version that ran setup, so restarting a client cannot silently move to a newer release.
Global setup never stores the repository where setup happened. OpenCode gets a workspace-relative working directory; other supported clients launch LeanToken from the workspace cwd selected by the host. If a host instead starts it from the home directory or a filesystem root, LeanToken refuses to index that broad root by default.
Restart or reload the configured clients, then verify the connection and first retrieval from a repository:
npx leantoken doctor
Try a broad task such as: Find the code related to request cancellation before
editing. LeanToken helps the agent start with leantoken.context, while its
normal tools remain available for edits, builds, and tests.
Inspect LeanToken's observed repository-local token accounting:
npx leantoken savings
Advanced setup and version management
To skip the wizard, select clients explicitly or configure all supported clients:
npx leantoken setup --claude --codex --yes
npx leantoken setup --all --yes
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