you are not your job
you are not your github profile but, you are the top 5 prompts you send to codex
PROMPT ENGINEERING
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Your identity is your top 5 prompts to Codex
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Deep vibe research: even crazier paths than vibe coding
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If you think that vibe coding can lead you down some crazy wrong paths, try deep vibe research!
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DeepSeek uses open-perfectblend dataset to train DSpark drafter
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Fun surprise: DeepSeek used my open-perfectblend dataset to train their new DSpark drafter Time to promote it again! It's an open-source reproduction of "The Perfect Blend" paper. If you ever need >1M diverse prompts in math, chat, and code, it does the job.
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@reach_vb — 2026-06-27
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True story: I stopped thinking about context since GPT 5.3 Codex Single project focused threads with the recent capability of codex to spinoff new threads is goated! Codex continues and goes through compaction but remembers all the important stuff and if not, it’ll look up
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Repeating the same context in every chat was unsustainable
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yes, repeating the same context in every chat was unsustainable
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Speculation on model’s default preferences for React in projects
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Not sure if that's a change in default preferences from the models or just that I'm often prompting inside existing projects and the models know full well not to introduce React to a project that isn't using it already I tried in a fresh project just now and got vanilla HTML+JS
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LLMs less likely to default to React than last year
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Is it just me, or are today's LLMs less likely to default to building everything in React than they were last year? I used to have to say "don't use React" in almost all of my frontend web dev prompts, I've not had to do that for most of the models in quite a while now
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KV Cache and Prompt Caching for Production AI Agents
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If I had to choose just one metric, I'd argue that the KV-cache hit rate is the single most important metric for a production-stage AI agent. – Manus AI prompt caching is important! read about how we do it with deep agents
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Writer creates GOV.UK style guide derived writing skill for agents
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I got tired of reading badly formatted agent written reports, so I put together a writing skill derived from the GOVUK style guide and content design principles: https://
gist.github.com/fofr/505e225f9
bf5e839d30c12ba6bfa0be2
… Content is a little out of date, but here you can see the effect of the skill:
