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Andrew Stellman 👾

@andrewstellman.bsky.social

We’ll dig into how to take control of that process so the AI is working for you, not the other way around.

✅ Attend free with a 10-day O’Reilly trial
✅ Or check if your company already pays for access

See you tomorrow. Let’s make these tools work for you.

August 12, 2025 at 1:00 PM

Andrew Stellman 👾

@andrewstellman.bsky.social

🚨 𝐌𝐲 𝐎'𝐑𝐞𝐢𝐥𝐥𝐲 𝐋𝐢𝐯𝐞 𝐓𝐫𝐚𝐢𝐧𝐢𝐧𝐠 𝐜𝐨𝐮𝐫𝐬𝐞 𝐨𝐧 𝐮𝐬𝐢𝐧𝐠 𝐀𝐈 𝐟𝐨𝐫 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐬𝐭𝐚𝐫𝐭𝐬 𝐢𝐧 𝐨𝐧𝐞 𝐡𝐨𝐮𝐫! 🚨

✨ You can still attend for free with an @oreilly.bsky.social trial! Details below.

Copilot and ChatGPT for Java and C# Developers
📅 Live April 16
🔗 learning.oreilly.com/live-events/...

A presentation slide titled "Copilot is a lot more than just a 'fancy' system for autocomplete suggestions." It explains that Copilot uses AI to generate code suggestions based on the user's code, paying attention to context like method names and comments. It concludes by suggesting that Copilot is an AI coding partner that works best with code that clearly communicates intent.

August 12, 2025 at 1:00 PM

Andrew Stellman 👾

@andrewstellman.bsky.social

✅ Attend free with a 10-day O’Reilly trial
✅ Or check if your company already pays for access

See you tomorrow. Let’s make these tools work for you.

August 11, 2025 at 5:58 PM

Andrew Stellman 👾

@andrewstellman.bsky.social

🚨 𝐋𝐚𝐬𝐭 𝐜𝐡𝐚𝐧𝐜𝐞! 𝐌𝐲 𝐎'𝐑𝐞𝐢𝐥𝐥𝐲 𝐋𝐢𝐯𝐞 𝐓𝐫𝐚𝐢𝐧𝐢𝐧𝐠 𝐜𝐨𝐮𝐫𝐬𝐞 𝐢𝐬 𝐭𝐨𝐦𝐨𝐫𝐫𝐨𝐰 🚨

✨ You can still attend my @oreilly.bsky.social course for free! Details below.

Copilot and ChatGPT for Java and C# Developers
📅 Live April 16
🔗 learning.oreilly.com/live-events/...

This isn’t just about cool demos or AI tricks.

A presentation slide with the title "Copilot is a lot more than just a 'fancy' system for autocomplete suggestions." The slide has four bullet points. The first bullet point reads: "Copilot uses AI to generate suggestions based on your actual code, not just predict the next token." The second bullet point reads: "It pays attention to method and class names, filenames, comments, and what's happening around your cursor." The third bullet point reads: "The more your code communicates intent, the more useful Copilot's suggestions become." The fourth bullet point is a concluding thought: "Think of Copilot as an AI coding partner—it’s powerful, but it works best when your code gives it something meaningful to respond to." The bottom left corner has small text that says "Prompting Copilot and ChatGPT for Code — @AndrewStellman." The number "43" is in the bottom right corner.

August 11, 2025 at 5:58 PM

Andrew Stellman 👾

@andrewstellman.bsky.social

✅ Attend free with a 10-day O’Reilly trial
✅ Or check if your company already pays for access

See you tomorrow. Let’s make these tools work for you.

August 11, 2025 at 4:23 PM

Andrew Stellman 👾

@andrewstellman.bsky.social

🚨 𝐋𝐚𝐬𝐭 𝐜𝐡𝐚𝐧𝐜𝐞! 𝐌𝐲 𝐎'𝐑𝐞𝐢𝐥𝐥𝐲 𝐋𝐢𝐯𝐞 𝐓𝐫𝐚𝐢𝐧𝐢𝐧𝐠 𝐜𝐨𝐮𝐫𝐬𝐞 𝐢𝐬 𝐭𝐨𝐦𝐨𝐫𝐫𝐨𝐰 🚨

✨ You can still attend for free! Details below.

Copilot and ChatGPT for Java and C# Developers
📅 Live April 16
🔗 learning.oreilly.com/live-events/...

This isn’t just about cool demos or showing off AI tricks.

August 11, 2025 at 4:23 PM

Andrew Stellman 👾

@andrewstellman.bsky.social

OpenAI just released ChatGPT 5… and wow.

I was fixing a bug in a shell script I use to edit video files. It thought for 29 seconds and this is what it came back with. WTF 🤦🏻

I’ve been getting responses like this all day. Is anyone else seeing GPT-5 completely lose its 💩, or is it just me?

Screenshot of a terminal or command line interface showing an audio processing script output. The script './replace_audio.sh' is being run on a file called 'Test 2.mov'. It displays 'Verifying original audio format...' followed by a red X error message stating 'Error: Original audio is not 24-bit. Found: 48000'. Below this is text saying 'Thought for 29s' and then an AI assistant's response offering to help with various tasks like summarizing chapters, comparing concepts, creating course outlines, or making cheat sheets. The assistant asks the user to point to specific documentation or describe a topic. At the bottom are interface buttons for copy, thumbs down, audio, edit, and share functions.

August 9, 2025 at 11:02 PM

Andrew Stellman 👾

@andrewstellman.bsky.social

🚀 𝐂𝐨𝐩𝐢𝐥𝐨𝐭 𝐫𝐞𝐚𝐝𝐬 𝐲𝐨𝐮𝐫 𝐜𝐨𝐦𝐦𝐞𝐧𝐭𝐬. 𝐇𝐞𝐫𝐞’𝐬 𝐰𝐡𝐚𝐭 𝐭𝐡𝐚𝐭 𝐦𝐞𝐚𝐧𝐬 𝐟𝐨𝐫 𝐲𝐨𝐮𝐫 𝐜𝐨𝐝𝐞 🚀

I’ll be teaching this live next week, and this part always gets devs thinking differently about how they code with AI.

✨ Sign up today and take advantage of a free 10-day O’Reilly trial—just in time for the course:

Slide: Use comments to steer Copilot’s suggestions

Copilot pays close attention to how you write your comments, especially when you start a list or documentation block. Even a few words can shape what it generates next.
Start a comment like this: // This method does the following: and Copilot will suggest bullet points.
Add Javadoc or XMLdoc comment and it often generates a full method based on it.
Add code like this: log.info( and Copilot often fills in a useful log message based on what your code just did.
Here’s a tip: Try phrasing your comment as if you're about to explain the next step—and let Copilot take a crack at it.

August 7, 2025 at 3:19 PM

Andrew Stellman 👾

@andrewstellman.bsky.social

The more you give,
the more you receive.

August 5, 2025 at 3:57 PM

Andrew Stellman 👾

@andrewstellman.bsky.social

WEIRD AI hallucination of the day: ChatGPT accidentally turned into a Taiwanese YouTuber.

Apparently “please like and subscribe” is the new lorem ipsum?

So I hit the mic button to dictate a comment in ChatGPT, then immediately tapped the checkmark before saying anything.

August 4, 2025 at 4:56 PM

Andrew Stellman 👾

@andrewstellman.bsky.social

🚀 How Copilot “reads” your code—and how to help it do better 🚀

𝗖𝗼𝗽𝗶𝗹𝗼𝘁 𝗱𝗼𝗲𝘀𝗻’𝘁 𝗷𝘂𝘀𝘁 𝗴𝘂𝗲𝘀𝘀.

It pulls in code from all around your cursor, checks variable names, comments, and patterns across your whole project, and tries to figure out what you’re building.

July 30, 2025 at 7:03 PM

Andrew Stellman 👾

@andrewstellman.bsky.social

Here’s one of my favorite AI tips for getting better SQL queries from Copilot (or ChatGPT, Claude, etc.).

Before you ask it to write the query, ask it to give you a query that lists the column names and types for the table you’re working with. Then run that and paste the results back into the chat.

Copilot chat screenshot: "Here's the result of the SELECT from information_schema.columns for the 'members' table. How do I find the last names of any members who joined in the last 6 months?" (followed by table structure)

July 22, 2025 at 3:16 PM

Andrew Stellman 👾

@andrewstellman.bsky.social

A little career advice for junior folks. People don't always appreciate "constructive" feedback.

Here’s a little career advice for junior folks.

What do you do when someone at work sends you a long email full of unsolicited “constructive” feedback, and all you want to say is f***cck yoooouuuu shutupshutupshutup—but you need to be polite?

Avoid giving anyone that feeling. If you don’t want someone to react that way to your email, don’t send a bunch of unasked-for feedback that would take hours of work to address.

July 21, 2025 at 7:31 PM

Andrew Stellman 👾

@andrewstellman.bsky.social

Whenever I do a training session with this slide, the word “partner” always seems to trigger someone. I actually like that—it means some people are skeptical, which is probably a good thing now that AIs are getting increasingly autonomous, at least when it comes to letting them run wild in our code.

A bridge diagram labeled “The gap between asking a question and solving a problem.” The left side of the bridge says “Ask Copilot or ChatGPT a question.” The right side says “Get help solving your actual problem.” The bridge is labeled with five steps: “Add context,” “Research,” “Frame the problem,” “Refine the request,” and “Think critically.” A note at the bottom says, “It’s not about the tool. It’s about how you use it.”

July 18, 2025 at 1:36 PM

Andrew Stellman 👾

@andrewstellman.bsky.social

🚀 𝐂𝐨𝐩𝐢𝐥𝐨𝐭 𝐜𝐚𝐧'𝐭 𝐫𝐞𝐦𝐞𝐦𝐛𝐞𝐫 𝐚𝐧𝐲𝐭𝐡𝐢𝐧𝐠—𝐮𝐧𝐥𝐞𝐬𝐬 𝐲𝐨𝐮 𝐠𝐢𝐯𝐞 𝐢𝐭 𝐚 𝐦𝐞𝐦𝐨𝐫𝐲. 🚀

I got this great Copilot tip straight from one of my contacts at GitHub, and I wanted to share it with you. It started out as something one of their engineers did on their own project—and it turned out to be so useful…

July 17, 2025 at 2:07 PM

Andrew Stellman 👾

@andrewstellman.bsky.social

🚀 𝐓𝐡𝐞 𝐃𝐨 𝐖𝐡𝐚𝐭 𝐈 𝐌𝐞𝐚𝐧𝐭, 𝐍𝐨𝐭 𝐖𝐡𝐚𝐭 𝐈 𝐒𝐚𝐢𝐝 𝐏𝐫𝐨𝐛𝐥𝐞𝐦. 🚀

This is something dev teams have been dealing with forever. You're a product owner. You write some great requirements or user stories and give them to the team. The team builds exactly what was asked for…

Slide:

The “Do What I Meant, Not What I Said” Problem

You told it what to do, and it technically did—but not how you meant.

July 16, 2025 at 5:25 PM

Andrew Stellman 👾

@andrewstellman.bsky.social

🚀 𝐂𝐨𝐩𝐢𝐥𝐨𝐭 𝐰𝐨𝐧’𝐭 𝐫𝐞𝐚𝐝 𝐲𝐨𝐮𝐫 𝐦𝐢𝐧𝐝. 🚀

𝐼𝑓 𝑦𝑜𝑢 𝑤𝑎𝑛𝑡 𝑔𝑜𝑜𝑑 𝑠𝑢𝑔𝑔𝑒𝑠𝑡𝑖𝑜𝑛𝑠, 𝑦𝑜𝑢 ℎ𝑎𝑣𝑒 𝑡𝑜 𝑔𝑖𝑣𝑒 𝑖𝑡 𝑠𝑜𝑚𝑒𝑡ℎ𝑖𝑛𝑔 𝑡𝑜 𝑤𝑜𝑟𝑘 𝑤𝑖𝑡ℎ.

Copilot, Claude, ChatGPT, and other AIs don't know what you’re actually trying to build. They can’t see your design decisions or your goals. They only have the code, the comments around…

Tips for giving Copilot the right context

Copilot’s suggestions depend heavily on the code around your cursor. These habits help it pick up on your intent:
Use meaningful names.
Write intentional comments.
Keep your structure clear.
Stay near recent code.

July 16, 2025 at 1:20 PM

Andrew Stellman 👾

@andrewstellman.bsky.social

🚀 𝐏𝐫𝐨𝐦𝐩𝐭𝐢𝐧𝐠 𝐢𝐬𝐧’𝐭 𝐦𝐚𝐠𝐢𝐜. 𝐈𝐭’𝐬 𝐚 𝐬𝐤𝐢𝐥𝐥. 🚀

I really hate when people act like prompt engineering is some kind of magic trick you can't understand. It just isn't.

Sure, Copilot and ChatGPT can give you wildly different answers depending on how you ask.

Essential tips for crafting effective prompts
Clear and detailed prompts get you better results from your AI.
Be Specific and Clear: Clearly state what you're looking for. Instead of asking “How do I use a for loop?” specify the language and context, like “How do I ...

July 14, 2025 at 2:14 PM

Andrew Stellman 👾

@andrewstellman.bsky.social

I’ve spent the last 20+ years helping developers get better at what they do, and I care a lot about making this clear, approachable, and genuinely useful.

If you’re curious or want to level up how you’re using these tools, I’d love for you to join me.

July 9, 2025 at 3:35 PM

Andrew Stellman 👾

@andrewstellman.bsky.social

🚀 I’m excited to announce my next O'Reilly Live Training session! 🚀

𝐂𝐨𝐩𝐢𝐥𝐨𝐭 𝐚𝐧𝐝 𝐂𝐡𝐚𝐭𝐆𝐏𝐓 𝐟𝐨𝐫 𝐉𝐚𝐯𝐚 𝐚𝐧𝐝 𝐂# 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫𝐬

📅 August 12, 2025
🔗 learning.oreilly.com/live-events/...

I built this session for developers who want a real, practical way to use AI tools effectively in their work.