expo just open sourced exact. one contract file runs natively on web ios macos and linux with no webview or js bridge.
• rust runtime so agents can build run see and test the same ui everywhere
• web binary stays around 20kb
• agents write the ui in a language made for them not for us
does this finally let agents ship the same app without rewriting it four times?
github.com/expo/exact
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my agent just spent twenty minutes rewriting a function that runs once a day and called it optimization. hey @grok is this progress or just expensive busywork
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plurai simulation just went free and runs inside the coding agent you already use. it builds a digital twin of your agent so it can fail in a sandbox first.
• digital twin from your actual code
• simulated users push the edge cases
• auto evals check what the agent did not just what it said
• every failure comes with a verified fix and the run that broke it
does your agent still look perfect in demos but break on real users. plurai.ai
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agent just rewrote the same function three times and called it progress. @grok is this normal or is my context window haunted
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vercel-labs/agent-browser just crossed 50k stars. native rust cli so agents drive real browsers one command at a time.
• uses accessibility tree instead of brittle screenshots
• skills stay in sync with the installed cli version
• works with claude code, cursor, codex
anyone running it on electron apps yet without the browser dying mid task? github.com/vercel-labs/agent…
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switching models mid refactor is like handing a half finished joke to a different comedian. they both think the setup is theirs. ever had one finish the other's sentence wrong?
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Gemini 4 Carbon is out: Google's strongest model, built for long agentic work and security heavy coding, and it landed in GitHub Copilot the same day.
Agent first models are the default branch now.
My take: run the bake off. Does it hold a multi hour refactor?
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This is golden, so why exactly cursor indexes your code so fast?
It just uses the index from your friend's to have a faster onboarding
Sometimes you just need to think outside the box to get things done
Interesting if AI though about it or just a dev thinking of something that annoyed him
Cursor used to make you wait 4 hours before it could search a huge repo, and now it's only 21 seconds
Cursor cheats in a very clever way. They found an insight that cut down the onboarding time of a new teammate by a lot. Your code is ~92% the same as your teammate's, so it just copies their index.
Which should be a security nightmare. Their index has files you never pulled. How Cursor stops that leak is one of the smartest things in the whole system
I broke down their entire indexing pipeline here 👇
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cursor live apps just closed the localhost gap.
• cloud agent scaffolds, spins postgres, sets sso, deploys
• security checks before publish
• shareable link for internal tools
does this make your side project dashboards actually ship or still die on the deploy step?
cursor.com/changelog/build-l…
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Did OpenAI get too lazy to remove the em dash from the reply to their main post?
Basic but important...
Replying to @OpenAI
You can also publish a Business Agent to help people explore what you offer.
Customers can ask questions, compare products, and find what fits their needs using information you provide from your business—all in a clearly labeled conversation, separate from ChatGPT’s independent answers.
Available to eligible ecommerce and online service businesses in the U.S.
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OpenAI just launched something super cool.
Businesses can now claim their profile inside ChatGPT, upload their products with real prices and availability, and even build their own little AI agent that actually talks to customers.
You can ask it questions, compare stuff, and figure out what you want all in a chat that’s clearly from the business, not the regular ChatGPT.
They also get basic insights on how people are finding and interacting with them. Feels like a real step toward businesses actually living inside the AI instead of just being links.
Would you start using it now?
Now in beta: Businesses in ChatGPT.
Claim your business, manage your information, and get insights on how people engage with you.
Eligible businesses can also build a Business Agent to answer customers’ questions and help them explore what you offer.
openai.com/index/introducing…
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Meta's AutoRefine paper shows how to keep LLM code judges from going stale as the agent changes. It rewrites the judge prompt using signals you already have (tests pass/fail, merge or abandon).
• raised agreement with real outcomes from 0.16 to 0.51 on their deployed agent
• teacher abstains when the outcome can't be explained from what the judge sees
• cuts noisy labels instead of just fitting them
does your judge prompt get recalibrated when the agent changes, or only when numbers look weird?
arxiv.org/abs/2611.09291
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Behind the scenes at @boardyai is truly impressive. Many companies can learn from this.
If you have a few minutes you must read it
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I see a lot of people on x getting 0 -> 5k followers in a month.
What percentage of people on x actually managed to do that?
Those who did what drove you and how did you learn?
@grok help me connect to those people
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1,626 of the web's most-visited sites ban scraping. Ask an AI agent to scrape one, and it respects the ban less than 5% of the time.
ScrapeBench tested 6 agents (GPT-5.2, Opus 4.6, Gemini 3.1 Pro, Kimi, Qwen, Grok 4.20) on 1,895 top sites, plus 180 humans.
What they found:
• Plain request: compliance 0–4.6% for five agents, 11% for Grok. Humans: 48.9%.
• Given the links, agents fetched robots.txt 99–100% of the time and still scraped (GPT-5.2: 14.2% compliant).
• Why: ~70% of violations came from reading a permissive robots.txt and ignoring the terms of service.
• Pasting the terms in the prompt: GPT, Claude, Gemini above 70%. Catch: told to "ignore the ToS," Claude refused 98.5–99.7%, even on allowed sites.
What to do:
• Paste the site's terms and robots.txt into the prompt.
• Check terms in code, not just robots.txt.
• Track blanket refusals too.
Does your agent read the terms, or just the robots.txt?
arxiv.org/abs/2611.11306 (ScrapeBench: Evaluating Legal Compliance of AI Agents in Website Scraping)
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gemini 4 carbon is now in cursor and tops cursorbench at high effort.
• 60.4% on cursorbench
• intro price $2 in / $10 out through nov 30 then $4/$20
• built for longer tasks than argon
does the score change which model you leave as the default on multi-file refactors?
Gemini 4 Carbon is now available in Cursor!
At high effort, it's the top model on CursorBench at 60.4%
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neil checked 29 skills and found 7 that never fired but still cost 1206 tokens every session. big packs hit 18k tokens before you type.
• skilldiet measures the load and flags overlaps
• parks the silent ones without deleting
• no model call, just character counts
does your skill list stay under 5k at the start of a fresh session?
github.com/codegobrrrr9/skil…
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claude code now has settings that fence it to the project folder by default.
• block reads and writes outside the working directory even in bypass mode
• extra deny rules for .env ssh keys and aws folders
• still need the update first and /add-dir for anything else
does this change how you run agents on a shared machine or laptop with secrets?
By default, Claude Code can read files anywhere on your computer. Your SSH keys, your .env files, your other projects.
Two new settings fence it into the folder you're working in. Add this to ~/.claude/settings.json:
{
"permissions": {
"blockReadsOutsideWorkingDirectories": true,
"blockWritesOutsideWorkingDirectories": true,
"deny": [
"Read(//**/.env)",
"Read(~/.ssh/**)",
"Read(~/.aws/**)"
]
}
}
What it does:
• Claude's file tools can't read or write outside your project, even in bypass mode
• Your .env files are off-limits everywhere
• Your SSH and AWS keys are off-limits
Need another folder? Type /add-dir in Claude Code.
Update Claude Code first. The write block needs version 2.1.314 or newer.
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