validation — independent software & tools

8 independent validation listings the big search engines bury.

• codex-coding-os

  github · Free · by AymanShams

  Spec-first workflow pack for OpenAI Codex: skills, AGENTS.md templates, workflow gates, fresh-context review, validation, and handoff.

• claude-code-lint

  npm · Free · by GitHub Actions

  Comprehensive linter and programmatic API for Claude Code projects - validates CLAUDE.md files, skills, settings, hooks, MCP servers, plugins, and more

• @eslint/css-tree

  npm · Free · by GitHub Actions

  A tool set for CSS: fast detailed parser (CSS → AST), walker (AST traversal), generator (AST → CSS) and lexer (validation and matching) based on specs and browser implementations

• react-hook-form

  npm · Free · by bluebill1049

  Performant, flexible and extensible forms library for React Hooks

• Lighthouse

  github · Free · by matharrismma

  Computational verification of claims across chemistry, physics, math, statistics, code, biology, and governance. Four gates (RED → FLOOR → BROTHERS → GOD) enforce attestation and machine-checked verification independently — RED rejects on either. Built so an LLM can fact-check itself before answering.

• @andersmyrmel/vard

  npm · Free · by andersmyrmel

  Lightweight prompt injection detection for LLM applications. Zod-inspired chainable API for prompt security.

• css-tree

  npm · Free · by lahmatiy

  A tool set for CSS: fast detailed parser (CSS → AST), walker (AST traversal), generator (AST → CSS) and lexer (validation and matching) based on specs and browser implementations

• drizzle-zod

  npm · Free · by dankochetov

  Generate Zod schemas from Drizzle ORM schemas