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Title: GitHub - MachineLearningSystem/spec-ptc: Speculative programmatic tool calling (sPTC) for harnesses like RLM, CodeAct, etc. · GitHub

Open Graph Title: GitHub - MachineLearningSystem/spec-ptc: Speculative programmatic tool calling (sPTC) for harnesses like RLM, CodeAct, etc.

X Title: GitHub - MachineLearningSystem/spec-ptc: Speculative programmatic tool calling (sPTC) for harnesses like RLM, CodeAct, etc.

Description: Speculative programmatic tool calling (sPTC) for harnesses like RLM, CodeAct, etc. - MachineLearningSystem/spec-ptc

Open Graph Description: Speculative programmatic tool calling (sPTC) for harnesses like RLM, CodeAct, etc. - MachineLearningSystem/spec-ptc

X Description: Speculative programmatic tool calling (sPTC) for harnesses like RLM, CodeAct, etc. - MachineLearningSystem/spec-ptc

Opengraph URL: https://github.com/MachineLearningSystem/spec-ptc

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Skip to contenthttps://github.com/MachineLearningSystem/spec-ptc#start-of-content
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https://github.com/MachineLearningSystem/spec-ptc#speculative-programmatic-tool-calling
the blogpost herehttps://alexzhang13.github.io/blog/2026/spec-ptc/
https://github.com/MachineLearningSystem/spec-ptc/blob/main/media/comparison.gif
Recursive Language Models (RLMs)https://arxiv.org/abs/2512.24601
CodeActhttps://arxiv.org/abs/2402.01030
programmatic tool-calling (PTC)https://platform.claude.com/docs/en/agents-and-tools/tool-use/programmatic-tool-calling
https://github.com/MachineLearningSystem/spec-ptc#getting-started
RLMhttps://github.com/alexzhang13/rlm
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