Anti-hallucination guardrails for AI coding agents - hybrid Skill + MCP server (6 tools) that verifies code before it is marked done. Works with Claude Code, Cursor, VS Code, Copilot.
Anti-hallucination guardrails for AI coding agents.
A hybrid Agent Plugins plugin (Skill + MCP Server) that forces spec-driven development and verifies code before it is marked done — so "Done, all tests pass" becomes an observed fact, not a claim.
⭐ Like this project? Consider giving it a star — it helps developers find guardrails before they ship hallucinated code.
LLMs hallucinate — in code, that means invented APIs, undefined identifiers, fake test passes, and confident overclaims. The numbers:
- 15.1% of code hallucinations are knowledge-conflicting: calling APIs that don't exist or were never imported (arXiv:2404.00971). - Windows note: mcp.json launches the server via python3. On many Windows installs that alias is a Microsoft Store stub; if the server fails to start, change command to ["python", "server/guardserver.py"] or point it at your interpreter's absolute path.
AgentSeed runs on the Python standard library alone. Installing the extras upgrades two tools to industry-standard engines (auto-detected, graceful fallback either way):
Extra Upgrades Without it --- --- --- jsonschema schemavalidate → full Draft 2020-12 validation built-in subset validator pyflakes verifycode → pyflakes F821 undefined-name analysis built-in AST walk pyyaml SKILL.md frontmatter parsing → full YAML built-in lite parser
Use an absolute path to guardserver.py; the server resolves everything else from its own location, so no special cwd is required.
From the project README.
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Anti-hallucination gate for AI coding agents — 8 MCP tools catch invented APIs (17 languages), fake "all tests pass" claims, and slopsquatting packages before they ship. Zero-dependency Agent Plugins
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