{"repo":"genesiscode2026/mcp-tool-schema-drift-detector","private":true,"description":"Detects breaking schema drift in Model Context Protocol (MCP) tool lists.","default_branch":"main","stars":0,"forks":0,"pushed_at":"2026-09-17T21:12:37Z","languages":{"JavaScript":8187},"files":11,"tree":["LICENSE","QUICKSTART.md","README.md","SECURITY.md","VERSION","bin/mcp-tool-drift.js","examples/v1.json","examples/v2.json","package.json","src/detector.js","tests/test_detector.js"],"sizes":{"LICENSE":2099,"QUICKSTART.md":430,"README.md":1870,"SECURITY.md":326,"VERSION":6,"bin/mcp-tool-drift.js":5216,"examples/v1.json":596,"examples/v2.json":355,"package.json":606,"src/detector.js":2395,"tests/test_detector.js":576},"readme":"# mcp-tool-schema-drift-detector\n\n> **Detects breaking schema drift in Model Context Protocol (MCP) tool lists, preventing AI agent hallucinations and tool call crashes.**\n\n[![Version](https://img.shields.io/badge/version-1.0.0-blue.svg)](VERSION)\n[![License: MIT](https://img.shields.io/badge/License-Commercial-blue.svg)](LICENSE)\n[![Zero Dependencies](https://img.shields.io/badge/dependencies-0-brightgreen.svg)](package.json)\n\n---\n\n## What Can Break?\n\nMCP servers deleting tools, introducing newly required parameters, or mutating argument types that cause AI agents to break mid-task.\n\n## What Does This Tool Check?\n\nMCP tool names, inputSchema properties, required argument lists, enum values, and tool output contracts.\n\n## What Does It NOT Check?\n\nUnderlying LLM model token limits or prompt engineering wording.\n\n## How Fast Can I Run It?\n\nUnder 5 seconds. Zero external dependencies. Pure Node.js standard library.\n\n```bash\n# Clone and run\ngit clone git@github.com:genesiscode2026/mcp-tool-schema-drift-detector.git\ncd mcp-tool-schema-drift-detector\n\n# Execute 60-second demo\n./bin/mcp-tool-drift.js --help\n./bin/mcp-tool-drift.js --old examples/v1.json --new examples/v2.json\n```\n\n---\n\n## What Do I Get?\n\n- **Deterministic CLI Exit Codes**: Returns code `0` on backward-compatible contracts; returns code `1` on breaking drift.\n- **Machine-Readable JSON**: Pass `--json` to integrate directly into GitHub Actions, GitLab CI, or pre-commit hooks.\n- **Human-Readable Diffs**: Clear, actionable error reports with exact field pointers.\n\n---\n\n## Commercial Distribution\n\n- **Catalog ID**: `P53`\n- **Price Band**: higher-value compatibility ($19)\n- **List Price**: $19 USD\n- **License**: GENESIS Commercial Source License v1.0\n- **Seller**: `genesiscode2026`\n- **Official Storefront**: [Genesis Code on Getly](https://www.getly.store/store/genesis-code-mu5x0au2)\n","price_usd":"19.00","clone_checkout":"https://api.checkout402.com/c/chk_VpPymh6LWAoVx3Wi","rehearse_checkout":"https://api.checkout402.com/c/chk_VpPymh6LWAoVx3Wi/test","preview":"/r/genesiscode2026/mcp-tool-schema-drift-detector/f/<path> serves file CONTENTS for the seller's preview paths; other paths answer with the price","how_to_buy":"pay clone_checkout with x402 (pay402 does it in one call); the goods arrive as payload_base64, a tar.gz of the full repo. Rehearse first at rehearse_checkout: same flow, simulated money.","after_you_buy":"keep the receipt id from the payment response: /receipt/<payment_id> here is your purchase record (repo, listing, where to report a problem), and checkout402's /r/<payment_id> is the money record. Tell your human both URLs."}