Developer tool lets cheap AI coding agents consult stronger models for hard problems

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A developer has released ask-fable, an open-source MCP server designed to give budget AI coding agents on-demand access to more powerful reasoning models only when needed. The tool integrates with Claude Code and other MCP clients, allowing a cheaper, faster model to handle routine code writing while delegating complex problems — such as concurrency bugs or architectural decisions — to stronger models. Ask-fable offers four query modes: a standard single-model query, a council mode that polls multiple models and synthesizes their answers, a chained pipeline mode, and an adversarial debate mode for major design forks. The system supports a wide range of AI backends including Anthropic, Gemini, GPT, DeepSeek, and Grok, with gateway support for hundreds of additional models via OpenRouter. A built-in guard layer restricts the tool to software reasoning tasks, rejecting off-topic or offensive-security requests.

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