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Andrew Stellman ๐Ÿ‘พ

@andrewstellman.bsky.social

Author, developer, team lead, musician. Author of O'Reilly books including Head First C#, Learning Agile, and Head First PMP. Solving complexity with simplicity.

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Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท last wk.

๐Ÿš€ ๐€๐ˆ ๐ž๐ฑ๐ฉ๐ž๐ซ๐ญ๐ฌ ๐ฐ๐š๐ง๐ญ ๐š ๐ง๐ž๐ฐ ๐ง๐š๐ฆ๐ž ๐Ÿ๐จ๐ซ ๐ฐ๐ก๐š๐ญ ๐ฐ๐ž ๐๐จ. ๐ˆ'๐ฏ๐ž ๐ ๐จ๐ญ ๐จ๐ง๐ž. ๐Ÿš€ ๐‘€๐‘ฆ ๐‘›๐‘’๐‘ค @oreilly.bsky.social ๐‘…๐‘Ž๐‘‘๐‘Ž๐‘Ÿ ๐‘๐‘–๐‘’๐‘๐‘’ ๐‘ก๐‘Ž๐‘˜๐‘’๐‘  ๐‘œ๐‘› ๐‘กโ„Ž๐‘’ โ„Ž๐‘Ž๐‘Ÿ๐‘‘๐‘’๐‘ ๐‘ก ๐‘๐‘Ÿ๐‘œ๐‘๐‘™๐‘’๐‘š ๐‘–๐‘› ๐‘๐‘œ๐‘š๐‘๐‘ข๐‘ก๐‘’๐‘Ÿ ๐‘ ๐‘๐‘–๐‘’๐‘›๐‘๐‘’: ๐‘›๐‘Ž๐‘š๐‘–๐‘›๐‘” ๐‘กโ„Ž๐‘–๐‘›๐‘”๐‘  Boris Cherny, who runs Claude Code, told Business Insider that the phrase "vibe coding" had started to annoy himโ€ฆ

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Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท last mo.

๐Ÿš€ ๐“๐ซ๐ž๐š๐ญ ๐ฒ๐จ๐ฎ๐ซ ๐€๐ˆ ๐š๐ ๐ž๐ง๐ญ ๐ฅ๐ข๐ค๐ž ๐š ๐ฉ๐ข๐ฉ๐ž, ๐ง๐จ๐ญ ๐š ๐๐š๐ญ๐š๐›๐š๐ฌ๐ž ๐Ÿš€ ๐‘…๐‘ข๐‘› ๐‘š๐‘Ž๐‘›๐‘ฆ ๐‘ โ„Ž๐‘œ๐‘Ÿ๐‘ก ๐‘ ๐‘’๐‘ ๐‘ ๐‘–๐‘œ๐‘›๐‘  ๐‘กโ„Ž๐‘Ž๐‘ก ๐‘Ÿ๐‘’๐‘Ž๐‘‘ ๐‘“๐‘Ÿ๐‘’๐‘ โ„Ž ๐‘“๐‘Ÿ๐‘œ๐‘š ๐‘‘๐‘–๐‘ ๐‘˜, ๐‘›๐‘œ๐‘ก ๐‘œ๐‘›๐‘’ ๐‘™๐‘œ๐‘›๐‘” ๐‘œ๐‘›๐‘’ ๐‘กโ„Ž๐‘Ž๐‘ก โ„Ž๐‘Ž๐‘  ๐‘ก๐‘œ ๐‘Ÿ๐‘’๐‘š๐‘’๐‘š๐‘๐‘’๐‘Ÿ The technique from my latest @OReilly.bsky.social Radar article that I lean on most is also one of the simplest:

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Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท last mo.

๐ŸŽ† ๐๐ก๐ข๐ฅ๐š๐๐ž๐ฅ๐ฉ๐ก๐ข๐š ๐ก๐š๐ฌ ๐›๐ž๐ž๐ง ๐ญ๐ž๐š๐œ๐ก๐ข๐ง๐  ๐ฉ๐ซ๐จ๐ฆ๐ฉ๐ญ ๐ž๐ง๐ ๐ข๐ง๐ž๐ž๐ซ๐ข๐ง๐  ๐Ÿ๐จ๐ซ ๐๐ž๐œ๐š๐๐ž๐ฌ ๐ŸŽ† I'm teaching my @OReilly.bsky.social course on AI-assisted coding from Philadelphia this week to celebrate America's big 250th birthday, and the prompt engineering curriculum here is a lot older than the tools.

Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท last mo.

๐ŸŽ† ๐€๐ฆ๐ž๐ซ๐ข๐œ๐š ๐ญ๐ฎ๐ซ๐ง๐ฌ ๐Ÿ๐Ÿ“๐ŸŽ ๐ญ๐ก๐ข๐ฌ ๐ฐ๐ž๐ž๐ค, ๐ฌ๐จ ๐ˆ'๐ฆ ๐›๐ซ๐ข๐ง๐ ๐ข๐ง๐  ๐ฆ๐ฒ ๐œ๐จ๐ฎ๐ซ๐ฌ๐ž ๐ญ๐จ ๐๐ก๐ข๐ฅ๐š๐๐ž๐ฅ๐ฉ๐ก๐ข๐š ๐ŸŽ† It's America's 250th birthday, and Philadelphia is where it all started! So to celebrate, I'm bringing my next @OReilly.bsky.social live training course to Philly!

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Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท last mo.

๐Ÿš€ ๐˜๐จ๐ฎ๐ซ ๐€๐ˆ ๐œ๐š๐ง ๐ก๐š๐ฏ๐ž ๐ญ๐ก๐ž ๐š๐ง๐ฌ๐ฐ๐ž๐ซ ๐ฌ๐ข๐ญ๐ญ๐ข๐ง๐  ๐ข๐ง ๐ข๐ญ๐ฌ ๐œ๐จ๐ง๐ญ๐ž๐ฑ๐ญ ๐š๐ง๐ ๐ฌ๐ญ๐ข๐ฅ๐ฅ ๐ฆ๐ข๐ฌ๐ฌ ๐ข๐ญ ๐Ÿš€ ๐‘‡โ„Ž๐‘’ ๐‘“๐‘œ๐‘ข๐‘Ÿ๐‘กโ„Ž ๐‘Ž๐‘Ÿ๐‘ก๐‘–๐‘๐‘™๐‘’ ๐‘–๐‘› ๐‘š๐‘ฆ ๐‘๐‘œ๐‘›๐‘ก๐‘’๐‘ฅ๐‘ก ๐‘š๐‘Ž๐‘›๐‘Ž๐‘”๐‘’๐‘š๐‘’๐‘›๐‘ก ๐‘ก๐‘Ÿ๐‘–๐‘™๐‘œ๐‘”๐‘ฆ Sometimes I wonder if my AI is as smart as I think it is. I've definitely had some experiences lately that made me question that.

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Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 2mo ago

๐Ÿš€ ๐˜๐จ๐ฎ๐ซ ๐€๐ˆ ๐š๐ ๐ž๐ง๐ญ ๐๐จ๐ž๐ฌ๐ง'๐ญ ๐ค๐ง๐จ๐ฐ ๐ฐ๐ก๐š๐ญ ๐ข๐ญ ๐Ÿ๐จ๐ซ๐ ๐จ๐ญ ๐Ÿš€ ๐ด ๐‘‘๐‘’๐‘ก๐‘’๐‘Ÿ๐‘š๐‘–๐‘›๐‘–๐‘ ๐‘ก๐‘–๐‘ ๐‘โ„Ž๐‘’๐‘๐‘˜ ๐‘๐‘Ž๐‘ก๐‘โ„Ž๐‘’๐‘  ๐‘๐‘œ๐‘›๐‘ก๐‘’๐‘ฅ๐‘ก ๐‘™๐‘œ๐‘ ๐‘  ๐‘กโ„Ž๐‘Ž๐‘ก ๐‘กโ„Ž๐‘’ ๐‘Ž๐‘”๐‘’๐‘›๐‘ก ๐‘๐‘Ž๐‘›'๐‘ก ๐‘“๐‘’๐‘’๐‘™ I cover a lot of ground in my new @oreilly.bsky.social Radar article on AI and learning about contextโ€ฆ

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Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 2mo ago

๐Ÿš€ ๐’๐š๐ฏ๐ž ๐ฒ๐จ๐ฎ๐ซ ๐€๐ˆ ๐ฌ๐ž๐ฌ๐ฌ๐ข๐จ๐ง'๐ฌ ๐ฌ๐ญ๐š๐ญ๐ž ๐ญ๐จ ๐๐ข๐ฌ๐ค ๐›๐ž๐Ÿ๐จ๐ซ๐ž ๐ฒ๐จ๐ฎ ๐ง๐ž๐ž๐ ๐ข๐ญ ๐Ÿš€ ๐ด ๐‘๐‘Ÿ๐‘Ž๐‘ โ„Ž๐‘’๐‘‘ ๐‘ ๐‘’๐‘ ๐‘ ๐‘–๐‘œ๐‘› ๐‘–๐‘  ๐‘Ž ๐‘š๐‘–๐‘›๐‘œ๐‘Ÿ ๐‘Ž๐‘›๐‘›๐‘œ๐‘ฆ๐‘Ž๐‘›๐‘๐‘’ ๐‘คโ„Ž๐‘’๐‘› ๐‘กโ„Ž๐‘’ ๐‘–๐‘š๐‘๐‘œ๐‘Ÿ๐‘ก๐‘Ž๐‘›๐‘ก ๐‘ ๐‘ก๐‘ข๐‘“๐‘“ ๐‘™๐‘–๐‘ฃ๐‘’๐‘  ๐‘–๐‘› ๐‘Ž ๐‘“๐‘–๐‘™๐‘’ My new @oreilly.bsky.social Radar article just went up, and it's the one I'd been looking forward to writing.

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O'Reilly@oreilly.bsky.social ยท 2mo ago

"The agentโ€™s working memory fills up, older information gets silently dropped or compressed, and the agent keeps going without realizing itโ€™s forgotten something." @andrewstellman.bsky.social talks about a pattern he has been refining for detecting and recovering from that problem: bit.ly/4uxjoWr

When Context Collapses: Teaching Agents to Detect and Recover from Lost Memory

Or, how I learned to stop worrying about compaction and love the file system

bit.ly

Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 2mo ago

๐Ÿš€ ๐Œ๐ฒ ๐ง๐ž๐ฐ @Oreilly.bsky.social ๐‘๐š๐๐š๐ซ ๐š๐ซ๐ญ๐ข๐œ๐ฅ๐ž ๐๐ซ๐จ๐ฉ๐ฉ๐ž๐: ๐–๐ก๐ž๐ง ๐‚๐จ๐ง๐ญ๐ž๐ฑ๐ญ ๐‚๐จ๐ฅ๐ฅ๐š๐ฉ๐ฌ๐ž๐ฌ ๐Ÿš€ ๐ป๐‘œ๐‘ค ๐‘ก๐‘œ ๐‘ก๐‘’๐‘Ž๐‘โ„Ž ๐‘ฆ๐‘œ๐‘ข๐‘Ÿ ๐‘Ž๐‘”๐‘’๐‘›๐‘ก๐‘  ๐‘ก๐‘œ ๐‘‘๐‘’๐‘ก๐‘’๐‘๐‘ก ๐‘Ž๐‘›๐‘‘ ๐‘Ÿ๐‘’๐‘๐‘œ๐‘ฃ๐‘’๐‘Ÿ ๐‘“๐‘Ÿ๐‘œ๐‘š ๐‘™๐‘œ๐‘ ๐‘ก ๐‘š๐‘’๐‘š๐‘œ๐‘Ÿ๐‘ฆ A few weeks ago I was deep into a long session with Copilot, working through a multi-phase code review.

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Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 2mo ago

๐Ÿš€ ๐“๐ก๐ž ๐€๐ˆ ๐ญ๐ž๐œ๐ก๐ง๐ข๐ช๐ฎ๐ž๐ฌ ๐ˆ ๐ฎ๐ฌ๐ž ๐Ÿ๐จ๐ซ ๐œ๐จ๐๐ข๐ง๐  ๐ฐ๐จ๐ซ๐ค ๐ญ๐ฎ๐ซ๐ง ๐จ๐ฎ๐ญ ๐ญ๐จ ๐ฐ๐จ๐ซ๐ค ๐Ÿ๐จ๐ซ ๐ฐ๐ซ๐ข๐ญ๐ข๐ง๐  ๐ญ๐จ๐จ ๐Ÿš€ ๐น๐‘œ๐‘ข๐‘Ÿ ๐‘๐‘Ÿ๐‘Ž๐‘๐‘ก๐‘–๐‘๐‘’๐‘  ๐‘–๐‘› ๐‘ก๐‘ค๐‘œ ๐‘๐‘Ÿ๐‘œ๐‘š๐‘๐‘ก๐‘ , ๐‘›๐‘œ ๐‘๐‘–๐‘๐‘’๐‘™๐‘–๐‘›๐‘’๐‘  ๐‘Ÿ๐‘’๐‘ž๐‘ข๐‘–๐‘Ÿ๐‘’๐‘‘ AI is generally a pretty lousy writer. You can usually tell when an AI wrote something, and honestly, as an @oreilly.bsky.social author, I'm pretty happy about that.

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Faisal@faisal.com ยท 2mo ago

And if you havenโ€™t been reading Andrewโ€™s posts about agent orchestration, go read those too.

Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 2mo ago

We'll build a real project together in Python, Java, and C#. The goal is to walk out with the muscle memory to use Cursor on real code the same day. Here's a link to the course. I hope to see you there! www.oreilly.com/live-events/... ๐‘‡โ„Ž๐‘ข๐‘Ÿ๐‘ ๐‘‘๐‘Ž๐‘ฆ, ๐ฝ๐‘ข๐‘›๐‘’ 4 ๐‘œ๐‘› ๐‘‚'๐‘…๐‘’๐‘–๐‘™๐‘™๐‘ฆ ๐ฟ๐‘–๐‘ฃ๐‘’ ๐ธ๐‘ฃ๐‘’๐‘›๐‘ก๐‘ .

Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 2mo ago

๐Ÿš€ ๐“๐จ๐ฆ๐จ๐ซ๐ซ๐จ๐ฐ! ๐Œ๐ฒ ๐Ž'๐‘๐ž๐ข๐ฅ๐ฅ๐ฒ ๐ฅ๐ข๐ฏ๐ž ๐œ๐จ๐ฎ๐ซ๐ฌ๐ž ๐ข๐ฌ ๐€๐ˆ-๐€๐ฌ๐ฌ๐ข๐ฌ๐ญ๐ž๐ ๐‚๐จ๐๐ข๐ง๐  ๐ฐ๐ข๐ญ๐ก ๐‚๐ฅ๐š๐ฎ๐๐ž ๐š๐ง๐ ๐‚๐ฎ๐ซ๐ฌ๐จ๐ซ, ๐š๐ง๐ ๐ฌ๐ฅ๐จ๐ญ๐ฌ ๐š๐ซ๐ž ๐Ÿ๐ข๐ฅ๐ฅ๐ข๐ง๐  ๐ฎ๐ฉ ๐Ÿš€ ๐ป๐‘Ž๐‘›๐‘‘๐‘ -๐‘œ๐‘› ๐ด๐ผ ๐‘๐‘œ๐‘‘๐‘–๐‘›๐‘” ๐‘“๐‘œ๐‘Ÿ ๐‘ค๐‘œ๐‘Ÿ๐‘˜๐‘–๐‘›๐‘” ๐‘‘๐‘’๐‘ฃ๐‘’๐‘™๐‘œ๐‘๐‘’๐‘Ÿ๐‘ 

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Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 2mo ago

๐Ÿš€ ๐˜๐จ๐ฎ๐ซ ๐€๐ˆ ๐œ๐จ๐๐ข๐ง๐  ๐ฌ๐ž๐ฌ๐ฌ๐ข๐จ๐ง ๐ข๐ฌ ๐ ๐ž๐ญ๐ญ๐ข๐ง๐  ๐๐ฎ๐ฆ๐›๐ž๐ซ ๐›๐ฒ ๐ญ๐ก๐ž ๐ฉ๐ซ๐จ๐ฆ๐ฉ๐ญ ๐š๐ง๐ ๐ฒ๐จ๐ฎ ๐œ๐š๐ง ๐Ÿ๐ž๐ž๐ฅ ๐ข๐ญ ๐Ÿš€ ๐ป๐‘’๐‘Ÿ๐‘’'๐‘  ๐‘กโ„Ž๐‘’ ๐‘š๐‘œ๐‘ฃ๐‘’ ๐‘๐‘’๐‘“๐‘œ๐‘Ÿ๐‘’ ๐‘ฆ๐‘œ๐‘ข ๐‘Ÿ๐‘’๐‘Ž๐‘โ„Ž ๐‘“๐‘œ๐‘Ÿ "๐‘›๐‘’๐‘ค ๐‘โ„Ž๐‘Ž๐‘ก" There's a really frustrating problem that everyone coding for AI runs into eventually. If you're a developer who uses AI, I bet you've seen it.

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Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 2mo ago

๐Ÿš€ ๐Ž๐ง๐ž ๐ญ๐ก๐ข๐ง๐  ๐ˆ'๐ฆ ๐ญ๐ž๐š๐œ๐ก๐ข๐ง๐  ๐ข๐ง ๐ฆ๐ฒ ๐Ž'๐‘๐ž๐ข๐ฅ๐ฅ๐ฒ ๐ฅ๐ข๐ฏ๐ž ๐œ๐จ๐ฎ๐ซ๐ฌ๐ž ๐“๐ก๐ฎ๐ซ๐ฌ๐๐š๐ฒ: ๐ ๐ž๐ญ๐ญ๐ข๐ง๐  ๐ฆ๐จ๐ซ๐ž ๐จ๐ฎ๐ญ ๐จ๐Ÿ ๐‚๐ฅ๐š๐ฎ๐๐ž ๐Ÿš€ ๐‘‡โ„Ž๐‘’ ๐ถ๐‘™๐‘Ž๐‘ข๐‘‘๐‘’ ๐‘๐‘Ÿ๐‘œ๐‘š๐‘๐‘ก๐‘–๐‘›๐‘” ๐‘ก๐‘’๐‘โ„Ž๐‘›๐‘–๐‘ž๐‘ข๐‘’๐‘  ๐‘กโ„Ž๐‘Ž๐‘ก ๐‘Ž๐‘๐‘ก๐‘ข๐‘Ž๐‘™๐‘™๐‘ฆ ๐‘๐‘Ž๐‘ฆ ๐‘œ๐‘“๐‘“ Slots are still available for my ๐€๐ˆ-๐€๐ฌ๐ฌ๐ข๐ฌ๐ญ๐ž๐ ๐‚๐จ๐๐ข๐ง๐  ๐ฐ๐ข๐ญ๐ก ๐‚๐ฅ๐š๐ฎ๐๐ž ๐š๐ง๐ ๐‚๐ฎ๐ซ๐ฌ๐จ๐ซ @oreilly.bsky.social live training course on Thursday!

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Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 2mo ago

๐Ÿš€ ๐Œ๐ฒ ๐ง๐ž๐ฑ๐ญ @oreilly.bsky.social ๐ฅ๐ข๐ฏ๐ž ๐œ๐จ๐ฎ๐ซ๐ฌ๐ž ๐ข๐ฌ ๐ง๐ž๐ฑ๐ญ ๐“๐ก๐ฎ๐ซ๐ฌ๐๐š๐ฒ: ๐€๐ˆ-๐€๐ฌ๐ฌ๐ข๐ฌ๐ญ๐ž๐ ๐‚๐จ๐๐ข๐ง๐  ๐ฐ๐ข๐ญ๐ก ๐‚๐ฅ๐š๐ฎ๐๐ž ๐š๐ง๐ ๐‚๐ฎ๐ซ๐ฌ๐จ๐ซ ๐Ÿš€ ๐‘‡๐‘ค๐‘œ โ„Ž๐‘œ๐‘ข๐‘Ÿ๐‘ , โ„Ž๐‘Ž๐‘›๐‘‘๐‘ -๐‘œ๐‘›, ๐ฝ๐‘Ž๐‘ฃ๐‘Ž/๐ถ# ๐‘’๐‘ฅ๐‘Ž๐‘š๐‘๐‘™๐‘’๐‘  I'm running a new live event on O'Reilly next Thursday, June 4: AI-Assisted Coding with Claude and Cursor.

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Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 2mo ago

๐Ÿš€ ๐Œ๐ฒ ๐Ž'๐‘๐ž๐ข๐ฅ๐ฅ๐ฒ ๐‘๐š๐๐š๐ซ ๐š๐ซ๐ญ๐ข๐œ๐ฅ๐ž ๐ ๐จ๐ญ ๐ฉ๐ข๐œ๐ค๐ž๐ ๐ฎ๐ฉ ๐›๐ฒ ๐ญ๐ก๐ž ๐’๐ญ๐š๐œ๐ค ๐Ž๐ฏ๐ž๐ซ๐Ÿ๐ฅ๐จ๐ฐ ๐›๐ฅ๐จ๐  ๐Ÿš€ ๐‘‡โ„Ž๐‘’ ๐ด๐‘๐‘๐‘–๐‘‘๐‘’๐‘›๐‘ก๐‘Ž๐‘™ ๐‘‚๐‘Ÿ๐‘โ„Ž๐‘’๐‘ ๐‘ก๐‘Ÿ๐‘Ž๐‘ก๐‘œ๐‘Ÿ, ๐‘Ÿ๐‘’๐‘๐‘ข๐‘๐‘™๐‘–๐‘ โ„Ž๐‘’๐‘‘ ๐‘Ž๐‘  ๐‘กโ„Ž๐‘’ ๐‘˜๐‘–๐‘๐‘˜๐‘œ๐‘“๐‘“ ๐‘œ๐‘“ ๐‘Ž ๐‘›๐‘’๐‘ค ๐‘š๐‘œ๐‘›๐‘กโ„Ž๐‘™๐‘ฆ ๐‘๐‘œ๐‘™๐‘ข๐‘š๐‘›

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Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 2mo ago

๐Ÿš€ ๐Œ๐ฒ ๐ง๐ž๐ฐ ๐Ž'๐‘๐ž๐ข๐ฅ๐ฅ๐ฒ ๐‘๐š๐๐š๐ซ ๐š๐ซ๐ญ๐ข๐œ๐ฅ๐ž ๐๐ซ๐จ๐ฉ๐ฉ๐ž๐: ๐˜๐จ๐ฎ๐ซ ๐€๐ˆ ๐€๐ ๐ž๐ง๐ญ ๐€๐ฅ๐ซ๐ž๐š๐๐ฒ ๐…๐จ๐ซ๐ ๐จ๐ญ ๐‡๐š๐ฅ๐Ÿ ๐จ๐Ÿ ๐–๐ก๐š๐ญ ๐˜๐จ๐ฎ ๐“๐จ๐ฅ๐ ๐ˆ๐ญ ๐Ÿš€ ๐ป๐‘œ๐‘ค ๐‘ก๐‘œ ๐‘˜๐‘’๐‘’๐‘ ๐‘Ž๐‘”๐‘’๐‘›๐‘ก๐‘  ๐‘Ž๐‘›๐‘‘ ๐‘ ๐‘˜๐‘–๐‘™๐‘™๐‘  ๐‘“๐‘Ÿ๐‘œ๐‘š ๐‘™๐‘œ๐‘ ๐‘–๐‘›๐‘” ๐‘ก๐‘Ÿ๐‘Ž๐‘๐‘˜ ๐‘š๐‘–๐‘‘-๐‘ค๐‘œ๐‘Ÿ๐‘˜๐‘“๐‘™๐‘œ๐‘ค This is the latest article in my O'Reilly Radar series on AI-driven development and agentic engineeringโ€ฆ

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Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 3mo ago

๐Ÿš€ ๐ˆ๐ฌ ๐œ๐จ๐ง๐ญ๐ž๐ฑ๐ญ ๐œ๐จ๐ฆ๐ฉ๐š๐œ๐ญ๐ข๐จ๐ง ๐ฃ๐ฎ๐ฌ๐ญ ๐ ๐š๐ซ๐›๐š๐ ๐ž ๐œ๐จ๐ฅ๐ฅ๐ž๐œ๐ญ๐ข๐จ๐ง ๐Ÿ๐จ๐ซ ๐€๐ˆ๐ฌ? ๐Ÿš€ ๐ผ๐‘“ ๐‘ฆ๐‘œ๐‘ข'๐‘ฃ๐‘’ ๐‘ค๐‘Ÿ๐‘–๐‘ก๐‘ก๐‘’๐‘› ๐บ๐ถ-๐‘“๐‘Ÿ๐‘–๐‘’๐‘›๐‘‘๐‘™๐‘ฆ ๐ฝ๐‘Ž๐‘ฃ๐‘Ž, ๐‘ฆ๐‘œ๐‘ข'๐‘Ÿ๐‘’ ๐‘๐‘Ÿ๐‘œ๐‘๐‘Ž๐‘๐‘™๐‘ฆ ๐‘Ž๐‘™๐‘Ÿ๐‘’๐‘Ž๐‘‘๐‘ฆ ๐‘กโ„Ž๐‘–๐‘›๐‘˜๐‘–๐‘›๐‘” ๐‘กโ„Ž๐‘–๐‘  A lot of people talk about the context window as AI's short-term memory and persisted context as long-term. The analogy to human memory doesn't really work for me.

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Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 3mo ago

๐Ÿš€ ๐ˆ๐ง๐œ๐ฅ๐ฎ๐๐ž ๐ญ๐ก๐ž "๐ฐ๐ก๐ฒ" ๐ข๐ง ๐ฒ๐จ๐ฎ๐ซ ๐œ๐จ๐ง๐ญ๐ž๐ฑ๐ญ ๐Ÿ๐ข๐ฅ๐ž๐ฌ, ๐จ๐ซ ๐ญ๐ก๐ž ๐€๐ˆ ๐ฐ๐ข๐ฅ๐ฅ ๐ฎ๐ง๐๐จ ๐ฒ๐จ๐ฎ๐ซ ๐๐ž๐œ๐ข๐ฌ๐ข๐จ๐ง๐ฌ ๐Ÿš€ ๐‘‡โ„Ž๐‘’ "๐‘๐‘™๐‘’๐‘Ž๐‘›๐‘’๐‘Ÿ" ๐‘๐‘œ๐‘‘๐‘’ ๐‘กโ„Ž๐‘Ž๐‘ก ๐‘˜๐‘’๐‘’๐‘๐‘  ๐‘๐‘œ๐‘š๐‘–๐‘›๐‘” ๐‘๐‘Ž๐‘๐‘˜ For the last year I've been running an ongoing experiment in AI-driven development: I build production-quality applications and AI skills where I let the AI write all the codeโ€ฆ

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Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 3mo ago

๐Ÿš€ ๐’๐ญ๐š๐ซ๐ญ๐ข๐ง๐  ๐š ๐Ÿ๐ซ๐ž๐ฌ๐ก ๐ฌ๐ž๐ฌ๐ฌ๐ข๐จ๐ง ๐œ๐š๐ง ๐š๐œ๐ญ๐ฎ๐š๐ฅ๐ฅ๐ฒ ๐ฆ๐š๐ค๐ž ๐ฒ๐จ๐ฎ๐ซ ๐€๐ˆ'๐ฌ ๐œ๐จ๐๐ž ๐ฐ๐จ๐ซ๐ฌ๐ž ๐Ÿš€ ๐‘Œ๐‘œ๐‘ข'๐‘Ÿ๐‘’ ๐‘ก๐‘Ÿ๐‘Ž๐‘‘๐‘–๐‘›๐‘” ๐‘๐‘œ๐‘š๐‘๐‘Ž๐‘๐‘ก๐‘–๐‘œ๐‘› ๐‘“๐‘œ๐‘Ÿ ๐‘Ž๐‘š๐‘›๐‘’๐‘ ๐‘–๐‘Ž There's something I see developers do all the time that they absolutely shouldn't. You're deep into an AI coding session, and the AI has built up a real understanding of your codebase.

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Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 3mo ago

๐Ÿš€ ๐Œ๐ฒ ๐ง๐ž๐ฐ @oreilly.bsky.social ๐‘๐š๐๐š๐ซ ๐š๐ซ๐ญ๐ข๐œ๐ฅ๐ž ๐๐ซ๐จ๐ฉ๐ฉ๐ž๐: ๐–๐ก๐ฒ ๐ƒ๐จ๐ž๐ฌ๐ง'๐ญ ๐€๐ง๐ฒ๐จ๐ง๐ž ๐“๐ž๐š๐œ๐ก ๐ƒ๐ž๐ฏ๐ž๐ฅ๐จ๐ฉ๐ž๐ซ๐ฌ ๐€๐›๐จ๐ฎ๐ญ ๐‚๐จ๐ง๐ญ๐ž๐ฑ๐ญ ๐Œ๐š๐ง๐š๐ ๐ž๐ฆ๐ž๐ง๐ญ? ๐Ÿš€ ๐‘Š๐‘’ ๐‘œ๐‘ฃ๐‘’๐‘Ÿ๐‘’๐‘ ๐‘ก๐‘–๐‘š๐‘Ž๐‘ก๐‘’ ๐‘คโ„Ž๐‘Ž๐‘ก ๐ด๐ผ ๐‘๐‘Ž๐‘› ๐‘Ÿ๐‘’๐‘š๐‘’๐‘š๐‘๐‘’๐‘Ÿ ๐‘Ž๐‘›๐‘‘ ๐‘ข๐‘›๐‘‘๐‘’๐‘Ÿ๐‘’๐‘ ๐‘ก๐‘–๐‘š๐‘Ž๐‘ก๐‘’ ๐‘คโ„Ž๐‘Ž๐‘ก ๐‘–๐‘ก ๐‘๐‘Ž๐‘› ๐‘œ๐‘Ÿ๐‘โ„Ž๐‘’๐‘ ๐‘ก๐‘Ÿ๐‘Ž๐‘ก๐‘’ www.oreilly.com/radar/why-do...

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Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 3mo ago

๐Ÿš€ ๐Œ๐ฒ ๐ง๐ž๐ฐ @oreilly.bsky.social ๐‘๐š๐๐š๐ซ ๐š๐ซ๐ญ๐ข๐œ๐ฅ๐ž ๐๐ซ๐จ๐ฉ๐ฉ๐ž๐: ๐€๐ˆ ๐‚๐จ๐๐ž ๐‘๐ž๐ฏ๐ข๐ž๐ฐ ๐Ž๐ง๐ฅ๐ฒ ๐‚๐š๐ญ๐œ๐ก๐ž๐ฌ ๐‡๐š๐ฅ๐Ÿ ๐จ๐Ÿ ๐˜๐จ๐ฎ๐ซ ๐๐ฎ๐ ๐ฌ ๐Ÿš€ ๐ฟ๐‘ข๐‘๐‘˜๐‘–๐‘™๐‘ฆ, ๐‘กโ„Ž๐‘’๐‘Ÿ๐‘’'๐‘  ๐‘Ž ๐‘ค๐‘Ž๐‘ฆ ๐‘ก๐‘œ ๐‘๐‘Ž๐‘ก๐‘โ„Ž ๐‘กโ„Ž๐‘’ ๐‘œ๐‘›๐‘’๐‘  ๐‘กโ„Ž๐‘Ž๐‘ก ๐‘›๐‘œ ๐‘ ๐‘ก๐‘Ÿ๐‘ข๐‘๐‘ก๐‘ข๐‘Ÿ๐‘Ž๐‘™ ๐‘Ž๐‘›๐‘Ž๐‘™๐‘ฆ๐‘ ๐‘–๐‘  ๐‘’๐‘ฃ๐‘’๐‘Ÿ ๐‘ค๐‘–๐‘™๐‘™ I really like how this one came out. It starts with a story about how I vibe coded a bus tracker app here in Brooklyn.

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Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 4mo ago

๐Ÿš€ ๐—”๐—œ ๐—ถ๐˜€ ๐˜„๐—ฟ๐—ถ๐˜๐—ถ๐—ป๐—ด ๐—ผ๐˜‚๐—ฟ ๐—ฐ๐—ผ๐—ฑ๐—ฒ ๐—ณ๐—ฎ๐˜€๐˜๐—ฒ๐—ฟ ๐˜๐—ต๐—ฎ๐—ป ๐˜„๐—ฒ ๐—ฐ๐—ฎ๐—ป ๐˜ƒ๐—ฒ๐—ฟ๐—ถ๐—ณ๐˜† ๐—ถ๐˜ ๐Ÿš€ ๐˜”๐˜บ ๐˜ฏ๐˜ฆ๐˜ธ @oreilly.bsky.social ๐˜™๐˜ข๐˜ฅ๐˜ข๐˜ณ ๐˜ฑ๐˜ช๐˜ฆ๐˜ค๐˜ฆ ๐˜ซ๐˜ถ๐˜ด๐˜ต ๐˜ฅ๐˜ณ๐˜ฐ๐˜ฑ๐˜ฑ๐˜ฆ๐˜ฅ โ€” ๐˜ข๐˜ฏ๐˜ฅ ๐˜ด๐˜ฐ ๐˜ฅ๐˜ช๐˜ฅ ๐˜ฎ๐˜บ ๐˜ฏ๐˜ฆ๐˜ธ ๐˜ˆ๐˜ ๐˜ด๐˜ฌ๐˜ช๐˜ญ๐˜ญ I'm really excited about this new O'Reilly Radar piece. It's the first in a few pieces I'm writing about how AI is causing serious problems with code qualityโ€ฆ

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Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 4mo ago

๐Ÿš€ ๐—œ ๐˜‚๐˜€๐—ฒ๐—ฑ ๐—–๐—น๐—ฎ๐˜‚๐—ฑ๐—ฒ ๐—ฎ๐—ป๐—ฑ ๐—š๐—ฒ๐—บ๐—ถ๐—ป๐—ถ ๐˜๐—ผ๐—ด๐—ฒ๐˜๐—ต๐—ฒ๐—ฟ ๐—ณ๐—ผ๐—ฟ ๐—ฎ๐—ป ๐—ฒ๐—ป๐˜๐—ถ๐—ฟ๐—ฒ ๐—ฝ๐—ฟ๐—ผ๐—ท๐—ฒ๐—ฐ๐˜. ๐—›๐—ฒ๐—ฟ๐—ฒ'๐˜€ ๐˜„๐—ต๐—ฎ๐˜ ๐—ต๐—ฎ๐—ฝ๐—ฝ๐—ฒ๐—ป๐—ฒ๐—ฑ. ๐Ÿš€ ๐˜๐˜ง ๐˜บ๐˜ฐ๐˜ถ'๐˜ณ๐˜ฆ ๐˜ฐ๐˜ฏ๐˜ญ๐˜บ ๐˜ถ๐˜ด๐˜ช๐˜ฏ๐˜จ ๐˜ฐ๐˜ฏ๐˜ฆ ๐˜ฎ๐˜ฐ๐˜ฅ๐˜ฆ๐˜ญ, ๐˜บ๐˜ฐ๐˜ถ'๐˜ณ๐˜ฆ ๐˜ฎ๐˜ช๐˜ด๐˜ด๐˜ช๐˜ฏ๐˜จ ๐˜ข ๐˜ญ๐˜ฐ๐˜ต My latest @oreilly.bsky.social Radar piece on the Toolkit Pattern just came out last week, about writing documentation that AI reads instead of your users.

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Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 4mo ago

๐Ÿš€ ๐— ๐˜† ๐—ป๐—ฒ๐˜„ @oreilly.bsky.social ๐—ฅ๐—ฎ๐—ฑ๐—ฎ๐—ฟ ๐—ฝ๐—ถ๐—ฒ๐—ฐ๐—ฒ ๐—ผ๐—ป ๐˜๐—ต๐—ฒ ๐—ง๐—ผ๐—ผ๐—น๐—ธ๐—ถ๐˜ ๐—ฃ๐—ฎ๐˜๐˜๐—ฒ๐—ฟ๐—ป ๐—ท๐˜‚๐˜€๐˜ ๐—ฑ๐—ฟ๐—ผ๐—ฝ๐—ฝ๐—ฒ๐—ฑ ๐Ÿš€ ๐˜ž๐˜ฉ๐˜บ ๐˜บ๐˜ฐ๐˜ถ๐˜ณ ๐˜ฑ๐˜ณ๐˜ฐ๐˜ซ๐˜ฆ๐˜ค๐˜ต'๐˜ด ๐˜ฃ๐˜ฆ๐˜ด๐˜ต ๐˜ฅ๐˜ฐ๐˜ค๐˜ถ๐˜ฎ๐˜ฆ๐˜ฏ๐˜ต๐˜ข๐˜ต๐˜ช๐˜ฐ๐˜ฏ ๐˜ช๐˜ด ๐˜ข ๐˜ง๐˜ช๐˜ญ๐˜ฆ ๐˜ฐ๐˜ฏ๐˜ญ๐˜บ ๐˜ˆ๐˜ ๐˜ธ๐˜ช๐˜ญ๐˜ญ ๐˜ณ๐˜ฆ๐˜ข๐˜ฅ I'm really excited about this one! It's the third piece in my O'Reilly Radar series on AI-driven development.

The Toolkit Pattern

Why your project's best documentation is a file only AI will read

oreilly.com

Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 4mo ago

๐Ÿš€ ๐—ฌ๐—ผ๐˜‚๐—ฟ ๐—”๐—œ ๐—ฝ๐—ถ๐—ฝ๐—ฒ๐—น๐—ถ๐—ป๐—ฒ ๐—บ๐—ถ๐—ด๐—ต๐˜ ๐—ฏ๐—ฒ ๐—น๐˜†๐—ถ๐—ป๐—ด ๐˜๐—ผ ๐˜†๐—ผ๐˜‚ ๐—ฎ๐—ฏ๐—ผ๐˜‚๐˜ ๐—ถ๐˜๐˜€ ๐—ผ๐˜„๐—ป ๐—ฟ๐—ฒ๐˜€๐˜‚๐—น๐˜๐˜€. ๐Ÿš€ ๐˜”๐˜ช๐˜ฏ๐˜ฆ ๐˜ธ๐˜ข๐˜ด. ๐˜ˆ๐˜ฏ๐˜ฅ ๐˜ต๐˜ฉ๐˜ณ๐˜ฆ๐˜ฆ ๐˜ˆ๐˜ ๐˜ข๐˜ฅ๐˜ท๐˜ช๐˜ด๐˜ฐ๐˜ณ๐˜ด ๐˜ฎ๐˜ช๐˜ด๐˜ด๐˜ฆ๐˜ฅ ๐˜ช๐˜ต. This one really got me. My AI blackjack simulation that ran hundreds of hands to compare different strategies was reporting great results.

Keep Deterministic Work Deterministic

How eight iterations of a blackjack simulation earned each nine the hard way

oreillyradar.substack.com

Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 5mo ago

๐Ÿš€ ๐—ง๐—ฟ๐˜† ๐˜๐—ต๐—ถ๐˜€: ๐—ฝ๐—ฎ๐˜€๐˜๐—ฒ ๐Ÿด ๐—ฝ๐—ฟ๐—ผ๐—บ๐—ฝ๐˜๐˜€ ๐—ถ๐—ป๐˜๐—ผ ๐—ฎ๐—ป๐˜† ๐—ฐ๐—ต๐—ฎ๐˜๐—ฏ๐—ผ๐˜ ๐—ฎ๐—ป๐—ฑ ๐˜„๐—ฎ๐˜๐—ฐ๐—ต ๐—ถ๐˜ ๐—ณ๐—ฎ๐—ถ๐—น ๐Ÿš€ ๐˜›๐˜ฉ๐˜ฆ๐˜ฏ ๐˜ข๐˜ด๐˜ฌ ๐˜ช๐˜ต ๐˜ต๐˜ฐ ๐˜ธ๐˜ณ๐˜ช๐˜ต๐˜ฆ ๐˜ค๐˜ฐ๐˜ฅ๐˜ฆ ๐˜ต๐˜ฉ๐˜ข๐˜ต ๐˜ฅ๐˜ฐ๐˜ฆ๐˜ด ๐˜ต๐˜ฉ๐˜ฆ ๐˜ด๐˜ข๐˜ฎ๐˜ฆ ๐˜ต๐˜ฉ๐˜ช๐˜ฏ๐˜จ. ๐˜๐˜ต ๐˜จ๐˜ฆ๐˜ต๐˜ด ๐˜ฆ๐˜ท๐˜ฆ๐˜ณ๐˜บ ๐˜ข๐˜ฏ๐˜ด๐˜ธ๐˜ฆ๐˜ณ ๐˜ณ๐˜ช๐˜จ๐˜ฉ๐˜ต. I built an exercise for my new O'Reilly Radar article that I had a lot of fun designing.

Keep Deterministic Work Deterministic

How eight iterations of a blackjack simulation earned each nine the hard way

oreillyradar.substack.com

Andrew Stellman ๐Ÿ‘พ@andrewstellman.bsky.social ยท 5mo ago

๐Ÿš€ ๐—œ ๐—ต๐—ฎ๐—ฑ ๐—ฎ๐—ป ๐—”๐—œ ๐—ฝ๐—น๐—ฎ๐˜† ๐Ÿต๐Ÿฌ๐Ÿฌ ๐—ต๐—ฎ๐—ป๐—ฑ๐˜€ ๐—ผ๐—ณ ๐—ฏ๐—น๐—ฎ๐—ฐ๐—ธ๐—ท๐—ฎ๐—ฐ๐—ธ. ๐—›๐—ฒ๐—ฟ๐—ฒ'๐˜€ ๐˜„๐—ต๐—ฎ๐˜ ๐—ต๐—ฎ๐—ฝ๐—ฝ๐—ฒ๐—ป๐—ฒ๐—ฑ. ๐Ÿš€ ๐˜›๐˜ฉ๐˜ฆ ๐˜ˆ๐˜ ๐˜ณ๐˜ฆ๐˜ง๐˜ถ๐˜ด๐˜ฆ๐˜ฅ ๐˜ต๐˜ฐ ๐˜ฎ๐˜ข๐˜ฌ๐˜ฆ ๐˜ฃ๐˜ข๐˜ฅ ๐˜ฑ๐˜ญ๐˜ข๐˜บ๐˜ด, ๐˜ฆ๐˜ท๐˜ฆ๐˜ฏ ๐˜ธ๐˜ฉ๐˜ฆ๐˜ฏ ๐˜ ๐˜ต๐˜ฐ๐˜ญ๐˜ฅ ๐˜ช๐˜ต ๐˜ต๐˜ฐ. ๐˜›๐˜ฉ๐˜ฆ ๐˜ข๐˜ณ๐˜ต๐˜ช๐˜ค๐˜ญ๐˜ฆ ๐˜ฆ๐˜น๐˜ฑ๐˜ญ๐˜ข๐˜ช๐˜ฏ๐˜ด ๐˜ธ๐˜ฉ๐˜บ. I built a pipeline that compares three blackjack strategies: "The Pro" plays strict basic strategy. โ€ฆ

Keep Deterministic Work Deterministic

How eight iterations of a blackjack simulation earned each nine the hard way

oreillyradar.substack.com