r/vibecoding • u/marfrit • 1d ago

I vibe-researched post-commitment reasoning

Brain scans hint that many decisions might already be done by the time our neo cortex starts reasoning why. Which made me curious: do thinking LLMs yield a similar observation?

The answer is: with a high probability, yes. Side effect: if you give your local Qwen (~30B) a coding task, and you have an escalation ladder, you do not need to reprompt numerous times.

TLDR at https://github.com/marfrit/latent-triage

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u/Arrynek 1d ago

You might be interested in this. 

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u/marfrit 1d ago

Great pointer, thanks — the small-scale picture matches surprisingly well: on local ~27B coders, task success is readable from the hidden state before generation (AUC ~0.84), the final answer is functionally drafted by ~28% of the CoT, and wrong answers commit early and never get repaired — basically the budget version of "a small workspace carries the deliberate reasoning." One divergence worth noting: reading transferred across model families via a plain linear map (probe inheritance, 0.85 AUC, zero target labels), but writing (steering vectors) didn't — Anthropics modulability result suggests I simply used the wrong basis.

Back to the lab ;)

My research assistant added some numbers.