v4.0.0 — the one MCP for what AI agents can't do alone

Your AI agent's Edit isn't atomic. This MCP makes it so.

A single-tool MCP server for atomic multi-file changes with automatic
rollback, built for Claude Code, Codex CLI, Cursor agents, and other
modern coding agents.

This is a breaking release. 39 → 6 → 1 commands. See README for the
rationale and use cases (DB migrations, cross-cutting refactors,
generated-code + glue sync, config + handler pairs).

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BREAKING

Reduced to one tool: transaction. Everything else that 3.0 still
shipped (file_watcher, scan_secrets, security_audit, encrypt_file,
decrypt_file) was removed.

The product positioning is now narrow on purpose: this server provides the
one operation modern coding agents (Claude Code, Codex CLI, …) literally
cannot replicate — atomic multi-file changes with rollback. Everything else
those agents already do well, and a wrapper just adds latency.

Removed

• file_watcher, scan_secrets, security_audit, encrypt_file,
  decrypt_file and their backing services.
• Runtime dependencies on chokidar and glob.

Changed

• TransactionCommand schema and validator now match the
  TransactionService operation set exactly: create, write, update
  (with updates[]), move (with destination), delete. Previously the
  schema advertised a non-existent read op and was missing write / move.
• README and CLAUDE.md rewritten around the single-tool positioning.
• CI boot smoke now asserts the registered command surface is exactly the
  one expected tool.