PromptMatrix

PromptMatrix is an open-source prompt CI/CD pipeline and runtime governance registry designed for AI agent swarms and LLM-powered applications. It decouples prompt behavioural specifications from application codebases, allowing teams to version, evaluate, review, and hot-patch prompts without redeploying the entire software application.

Key Capabilities: • Runtime Serving: Delivers active, evaluated prompt instructions via a low-latency API endpoint (<5ms via edge cache) with runtime variable interpolation. • Version Control: Maintains an immutable version history for prompt iterations, complete with line-by-line diffs and instant rollbacks. • Automated Evaluation Gates: Includes a zero-dependency offline rule-based evaluation engine as well as LLM-as-a-judge quality testing before promoting prompts to production environments. • Team Governance: Provides a visual dashboard where non-engineers can draft and test prompt changes, while engineers review diffs and approve updates. • Multi-Agent Support: Compatible with agentic frameworks including LangGraph, CrewAI, AutoGen, OpenClaw, and raw LLM API integrations. • Cryptographic Security: Incorporates zero-trust BYOK key isolation, AES-256-GCM encryption for stored evaluation keys, and SHA-256 hashed API keys.

PromptMatrix is available as a 100% open-source, local-first deployment running on SQLite with zero external dependencies, and can also be self-hosted on PostgreSQL or accessed via managed cloud hosting.