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Daily Brief — 2026-09-29

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@cursor_ai

Sonnet 5.5 in Cursor: announces Sonnet 5.5 is available in Cursor and says it performs on par with Opus on many tasks. post (https://x.com/cursor_ai/status/2104666044220821594) · 2,763❤ · 107 RT

@poteto

Restate the problem: shares a most-used prompt asking the model to restate goals and the problem in its own words. post (https://x.com/poteto/status/2104744961904394699) · 5,966❤ · 231 RT

Grok Bot multiplayer: announces Grok Bot team bots with shared plugins, skills, and credentials, addable to Slack in one click. post (https://x.com/poteto/status/2104664283808428165) · 1,566❤ · 126 RT

Grok Bot finances: notes Grok Bot can help with finances via connectors for dashboards, budgeting, and saving. post (https://x.com/poteto/status/2104646114427457941) · 1,257❤ · 122 RT

@swyx

OpenAI teaser: reacts to OpenAI's "Get ready" post, saying OAI designers have to be trolling. post (https://x.com/swyx/status/2104741800393253322) · 279❤ · 4 RT

@hwchase17

Jev for retrieval: quotes GPT Researcher swapping embeddings for Jev (73% vs 46% relevant context) and frames retrieval as a decision problem. post (https://x.com/hwchase17/status/2104610254000635952) · 274❤ · 32 RT

Harness naming: sketches coding harness → personal harness → org harness and asks for the right enterprise name. post (https://x.com/hwchase17/status/2104701729120157766) · 119❤ · 0 RT

Sandbox vs harness: argues every agent needs a sandbox with the harness outside it, separating brains from hands, citing Nvidia open-source sandbox tools. post (https://x.com/hwchase17/status/2104696039550963757) · 68❤ · 7 RT

@rauchg

Mercedes AMG F1 on Vercel: says they migrated mercedesamgf1.com with little intervention; ~70% faster builds and ~75% faster paints, with two AI skills to share back. post (https://x.com/rauchg/status/2104660502723072281) · 481❤ · 14 RT

Vercel domain search: notes Vercel domain search no longer requires auth, which helps agents. post (https://x.com/rauchg/status/2104764419305796094) · 255❤ · 8 RT

@simonw

Sonnet 5.5 free tier: says Sonnet 5.5 now powers Claude.ai free tier, while ChatGPT free is still GPT-5.6 Luna. post (https://x.com/simonw/status/2104682232522944909) · 1,319❤ · 59 RT

WeAreDevs keynote notes: publishes detailed notes and annotated transcript of his LLM/agents 2026 keynote at WeAreDevelopers World Congress North America. post (https://x.com/simonw/status/2104630129528037415) · 539❤ · 69 RT

@HamelHusain

Anthropic evals: says they are going through Anthropic's new evals release. post (https://x.com/HamelHusain/status/2104790174618316854) · 105❤ · 10 RT

Clay AI writing policy: highlights Clay's company-wide AI writing policy and its four guiding principles. post (https://x.com/HamelHusain/status/2104600057307935151) · 63❤ · 3 RT

Evals without domain expertise: argues non-experts can still help with evals early by finding low-hanging fruit in the data. post (https://x.com/HamelHusain/status/2104617180096549369) · 58❤ · 7 RT

Silent

@martinfowler, @karpathy: no original posts in window

Gaps

@xAI: API not authorized to read this account's posts (skipped)

GitHub trending

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  2. paperclipai/paperclip (https://github.com/paperclipai/paperclip): open-source app to manage agents at work (TypeScript, +3,197★ today)

  3. vectorize-io/hindsight (https://github.com/vectorize-io/hindsight): agent memory that learns (Python, +4,561★ today)

  4. NawfalMotii79/PLFM_RADAR (https://github.com/NawfalMotii79/PLFM_RADAR): open-source low-cost 10.5 GHz PLFM phased array RADAR system (PLSQL, +158★ today)

  5. cs341-illinois/coursebook (https://github.com/cs341-illinois/coursebook): open-source introductory systems programming textbook for the University of Illinois (TeX, +195★ today)