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DimensionPare NixStructured Nix build, develop, and flake operations as typed JSON.MartinLoop MCP ServerAn independent control layer that gives AI coding agents budgets, brakes, and receipts
FMRS29 / 100 · D79 / 100 · B
Reliability4 / 2012 / 20
Security and permissions4 / 2018 / 20
Maintenance9 / 2016 / 20
Documentation6 / 2018 / 20
Setup experience6 / 2015 / 20
Best for
  • Developers using Nix as a package manager or development environment.
  • Scenarios requiring integration of Nix operations into AI workflows.
  • MCP users who value token efficiency and reliable JSON output.
  • Engineering teams scaling AI coding agents while controlling spend
  • Platform teams that need auditable, rollback-aware agent execution records
  • Organizations using multiple agents (Claude, Codex, Gemini) under one governed flow
Not for
  • Projects that do not use Nix.
  • Users needing graphical or interactive Nix sessions.
  • Scripts that require unstructured text output.
  • Developers who just want a simple code-completion helper without run governance
  • Teams unwilling to accept local JSONL run records with HMAC signing
  • Environments without a supported adapter (Claude/Codex/Gemini CLIs, direct provider, or verifier-only)
Required permissions
  • Requires permission to execute Nix commands, including reading and writing to the Nix store.
  • May need network access to download Nix packages.
  • May access project flake files and other configuration files.
  • Read/write access to the configured repo root (writable scope restrictable via --allow-path/--deny-path)
  • Ability to invoke the chosen agent CLI (Claude/Codex/Gemini, etc.) and its underlying model account
  • Local disk writes for run records, receipts, and share outputs (share/run-receipt., etc.)
  • Execution of user-configured verifier commands (e.g. npm test)
Risks and side effects
  • Executing Nix builds can consume significant system resources (CPU, memory, disk).
  • Failed Nix operations could lead to corrupted build artifacts or inconsistent state.
  • Misconfiguration might expose sensitive information (e.g., environment variables).
  • Verifier commands are executed; poorly chosen verifier commands carry security risk despite preflight policy checks
  • Cost and token figures may be estimates (labeled with provenance) and should not be treated as settled accounting
  • Receipt integrity must be verified before use as trustworthy evidence; missing rollback evidence is flagged as EVIDENCE_BOUNDARY
  • Policy defaults come from martin.config.yaml and can be overridden by CLI flags; misconfiguration can loosen safety boundaries
Supported clientsClaude DesktopClaude Code, Codex, Gemini CLI, Cursor, VS Code, GitHub Copilot, Continue
Tools00