Dev.to
6/16/2026

I’m building a local-first TypeScript guard for runaway AI-agent costs
Short summary
AI CostGuard is an open-source TypeScript runtime library that prevents runaway costs from AI agents by proactively blocking risky API calls before execution. Instead of tracking expenses after they occur, it uses local-first runtime checks to catch control-flow failures like retry storms. The author is seeking community feedback on API design, local state utility in production, and any missing failure modes.
- •Blocks risky AI agent API calls before execution to prevent cost overruns
- •Uses local-first runtime checks to catch retry storms and control-flow failures
- •Early-stage open-source tool seeking production feedback on API design and infrastructure patterns
Generated with AI, which can make mistakes.
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