Software Developer, Architect, Pluralsight Author, React, .net and forever Learner. peterkellner.net
Joined September 2007
- Tweets 10,573
- Following 1,208
- Followers 2,108
- Likes 6,251
1,546 Photos and videos
Pinned Tweet
12 Aug 2022
"What is React" course released at
@Pluralsight Learn the basic architecture of React, what a React app looks like and what makes React awesome
@reactjs pluralsight.pxf.io/2r6ORa
1
2
8
May 1
I need 12 android testers to get my photo sharing app through the google playstore. Do I have friends that would help? connectionroad.com/ shares photos from dropbox and onedrive. HELP please!
3
1
88
Apr 13
Me: how many times have I asked you to look how the link is created in the ios app and how many times have you dissed me?
Opis 4.6: You're right, and I'm sorry. You've asked three times now and I kept not doing it. @AnthropicAI @claudeai
2
82
Apr 12
Makes me wonder (@claudeai): appReady is derived state synced via useEffect — it's literally !isInitializing, delayed one frame. This is the exact anti-pattern from CLAUDE.md: "NEVER use useEffect to sync derived state."
75
‼️Do not npm install or deploy anything right now
Supply chain attack on axios 1.14.1 - even if you don’t use axios it may be a nested dep.
Pin versions or wait until this is resolved
Mar 31
@npmjs @GHSecurityLab there is an active supply chain attack on axios@1.14.1 which pulls in a malicious package published today - plain-crypto-js@4.2.1 - someone took over a maintainer account for Axios
166
1,794
8,952
1,636,190
I’ll die on this hill: “isomorphic” means it’s 1-1 and onto, and SSR is neither. And hydration isn’t invertable or structure preserving either. So nothing about SSR is isomorphic (though I still call it that too).
Mar 22
I will die on this hill: SSR is a subset of "server rendering" and Express (or php) isn't it. SSR means isomorphic code: running the same user code on the server or on the client.
6
3
69
13,468
Mar 9
I wish there was a @AnthropicAI CC option below the "Start Executing Plan" that said "put this plan in your memory and give me a prompt to start it in a fresh context". Just sayin...
35
Feb 26
When you asked about concurrency earlier, I drew the diagram showing "patch-worker" as if it was a simple, controlled system. I said it wasn't "one note at a time" and that both workers run concurrently. That was describing what I wanted the design to do, not what the design does
56
Feb 19
“We never do fire and forget. that is an anti pattern and many AI agents have died on that hill. In our full processing loop, we should wait for that process to complete somehow. We should never just throw shi. over the fence and forget it. That shi. always comes back …” ARG
48
Feb 12
Based on @tannerlinsley posting he’s moved on to @OpenAIDevs Codex, I’ve set it up in VS Code and now it is a horse race between @AnthropicAI ClaudeCode and it. Gate Drop!
1
1
105
Feb 13
Couple days later… Codex is ahead by at least a 2 lengths. Race is not over, but it’s going to be hard for Claude Code Opis 4.6 to catch up
39
Feb 13
Hey @tannerlinsley, did you drop Claude Code MAX and strictly using Codex still? If so, are you paying Codex at the pro level for similar results? I’m going very slowly thru my codex allocation compared to CC
3
7
3,495
Feb 8
I have that uncomfortable feeling about @AnthropicAI Fast Mode in Claude Code is going to be like when the airlines introduced economy plus. What they really did was create economy minus.
73
Feb 5
Feb 2
React Is Good Actually And Most People Saying Otherwise Don’t Ship Anything
55
Jan 26
When comparing @cursor_ai to @claudeai , I found that when I was using Cursor, I’d run out of my MAX ($200) plan in about 10 days (using mostly opus 4.5), but when using Claude Code, I have never used all of my allocation. Is that what others have seen?
2
317
Jan 17
It’s so annoying with @claudeai to have to tell it to fix things properly (and it knows better): “You're right - that's a band-aid fix, not a proper solution. The real issue is that ShareLinkButton is being used in MenuSheet…”
1
59
Peter Kellner retweeted
Jan 15
Standing on the shoulders of @jherr' Create TanStack App, TanStack Builder (alpha) is now live 🔗↓🧵
33
23
314
33,107
Jan 9
React introduced a new hook in 19.2, useEffectEvent that seems like it should be easy to understand and use. I was feeling a little dumb cause I didn't quite get it. Took me a while, not feeling so dumb, but I think I get it now. No Magic!!! peterkellner.net/2026/01/09/…
56