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index a48308a..33d9fcb 100644
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@@ -54,6 +54,8 @@ This comprehensive list showcases the latest and greatest AI-powered development
 
 **[agentbox](https://github.com/madarco/agentbox)** - Run multiple coding agents in parallel, each teleported into its own sandboxed box (local Docker or cloud VMs via Hetzner/Daytona/Vercel/E2B) with sub-1s checkpoint starts. Works with Claude Code, Codex, and OpenCode.
 
+**[agent-cost-guardrails](https://github.com/sapph1re/agent-cost-guardrails)** - Python budget tracking and circuit-breaker middleware with adapters for CrewAI, AutoGen/AG2, and LangGraph; checks estimated tokens before calls and records actual token cost after responses.
+
 **[agent-deck](https://github.com/asheshgoplani/agent-deck)** - Terminal session manager for AI coding agents.
 
 **[agent-kanban](https://github.com/saltbo/agent-kanban)** - Agent-first kanban board with leader-worker model, cryptographic agent identity, and multi-runtime support (Claude Code, Codex, Gemini CLI).