MCP Server Lint - 2026 spec migration

The 2026-07-28 revision removed the initialize handshake, sessions, ping and four more RPCs. Your assistant was trained before that and still writes them.

For MCP server authors: the 2026 protocol revision changed transport and schema fields, and older servers fail silently in new clients.

What it does for free

• All 27 rules on the file you have open, with line numbers and the fix
• Check just the lines you selected
• Read every rule, with the removal it maps to

With a licence

• The whole repository — Every mcp.json, claude_desktop_config.json and server source file in the workspace in one pass, instead of one open file at a time.
• Migration report as a file — Writes the findings to CSV, JSON or HTML in the workspace, so the migration can be handed to someone else or attached to a ticket.
• CI output that fails the build — Machine-readable output a pipeline reads, so a removed RPC cannot be merged again after you have cleaned it out.

Full workspace sweep and report: licence key.

Freelance senior software engineers publish an average of $101/hour (contractrates.fyi, 2026, 584 submissions).

Personal licence - $9.99 once

Team key: $149 once, 5 seats, CI, every ReadyStack linter.

Install

ext install mcp-2026-migration-lint