Brian Casel
@briancasel.com
📤 6662
📥 386
📝 995
Building:
http://buildermethods.com
Co-hosting
http://panelpodcast.com
pinned post!
6 weeks ago I released Agent OS. Today it's at 1000+ stars on GitHub :) Already shipped many improvements. So many more planned. It's just getting started! Today I dropped an all-new walkthrough video.
buildermethods.com/agent-os
loading . . .
Agent OS | A free open-source system to train smart AI coding agents
Agent OS is a free open-source system to train your AI coding agents to build your way, not their way. Works with Claude Code, Cursor, or any other AI coding tool.
https://buildermethods.com/agent-os
about 1 month ago
3
14
0
@ianlandsman.com
Severance. Succession. Silo. The Studio. Just few recent shows that are great (and all start with S). And the only TV you watch is SURVIVOR??!!
about 5 hours ago
3
10
0
What's a good alternative to Apple News+? Looking for healthy mix of sources from across the spectrum. Major publications. Personalization. Great mobile app. I'd pay for one aggregator, don't love paying for individual news outlets.
about 15 hours ago
3
1
1
reposted by
Brian Casel
The Panel Podcast
4 days ago
Latest episode is out! We chatted about the
@transistor.fm
team retreat in Banff.
@justinjackson.ca
's vibe coded apps.
@briancasel.com
's workshop results + Builder Methods Pro subscribers! HOW DO YOU MANAGE ALL THE INBOUND MESSAGES?
panelpodcast.com/20
loading . . .
The Panel | Business vibes
Justin vibe-coded an app 5 minutes before recording this episode. Justin and the Transistor team just got back from Banff for their annual company retreat. How do these retreats actually work? What...
https://panelpodcast.com/20
0
4
1
I'm speaking most text now with Wisprflow, but it still trips up: - I start speaking mid-sentence, but it still capitalizes first letter. - Dictating "underscore" or "colon" types those words out. - It makes bullet lists when I don't want one and fails to when I do.
4 days ago
0
1
0
We're live! Come hang
add a skeleton here at some point
5 days ago
0
1
0
Spec-driven development in the real world needs 3 things to actually work (and be adopted). This is how we move from vibe coding to actually shipping.
6 days ago
1
5
0
Getting closer to release of Agent OS 2.0... Docs are being drafted in the codebase so that Claude can analyze our latest product flows and ensure our docs cover them accurately and completely. Multiple passes to make it simpler, more user friendly for newcomers.
8 days ago
0
5
0
On my private podcast, "What's next?", I post walk-and-talk episodes on behind the scenes of building my business and laying out... "What's next?" I dropped a double episode today: Part 1: First MRR! Part 2: My plan to scale YouTube Subscribe for free:
ripple.fm/private-podc...
11 days ago
0
1
0
Wireless charging stopped working on iPhone 15 Pro after upgrading to iOS 26. Anyone else?
11 days ago
3
0
1
Figuring out this puzzle is the biggest opportunity in my business right now: I want to 3x my video content output. And reduce my time spent on production. Without sacrificing quality. It's possible.
12 days ago
2
1
0
I want the best parts of Claude & ChatGPT: Memories, Projects, Artifacts, Chat... And the writing features of any good markdown editor... In one tool.
12 days ago
1
5
0
Update: I might hate Discord a bit less now that I opened one for first members... Easy API. Very customizeable. Menus actually less chaotic than Slack's. Discord has threads now. All positives 👍 (could do without the gamer UI noise though)
add a skeleton here at some point
12 days ago
1
5
0
The launch week to-do list: Lifting a plane off the ground (with passengers) while you're still bolting on the wings.
14 days ago
2
2
1
Working on the app behind
buildermethods.com
is a breathe of fresh air. My recent projects (Agent OS, Instrumental Components) must work for me *and* others to build on them. That "buildability" factor easily 10x's time & complexity to ship. But this project is all mine :) (the backend at least)
15 days ago
0
5
0
Orchestrating subagents for every phase of development using Agent OS 2.0. Sharing more details on this in tomorrow's workshop.
15 days ago
3
17
1
Perfect day for a stroll around the city.
16 days ago
0
6
0
Liking Marp for markdown-based slides presentations. Just the right balance of simplicity to create decks (markdown) and design control (HTML, CSS). My go-to from now on.
18 days ago
1
2
0
I'm constantly flipping between tasking AI with building big complex features or quick iterative tasks. Big stuff: - Spec-driven w/ Agent OS - Claude Code - Opus (slow but smart) - Let it cook. Autonomous. Iterative stuff: - Cursor - Sonnet (fast, smart enough) - Collaborative.
18 days ago
1
2
1
I'm writing today's newsletter about this. Interesting angle on it (work in progress).
add a skeleton here at some point
19 days ago
1
1
0
My Apple "How much I care meter": Thinner iPhone: 0% Orange iPhone: 1% Liquid Glass: 0% Better cameras: 1% Better battery: 1% AirPods translation: 2% Block spam texts & calls for good: 1000% (if it works)
19 days ago
2
3
0
Today's project: Using Shortwave's AI assistant to analyze all my survey responses and collect questions for the Builder Methods workshop on Tuesday.
19 days ago
0
3
1
The Panel is on today!
@ianlandsman.com
joining
@justinjackson.ca
and I for a game of "let's trade businesses for a day". Join us in the chat! Going live 30 mins from now.
www.youtube.com/live/c57WWiU...
loading . . .
THE PANEL PODCAST – Ian Landsman joins Justin Jackson and Brian Casel
YouTube video by Justin Jackson
https://www.youtube.com/live/c57WWiUDfJI
19 days ago
1
4
0
Posted a job to find a video editor. I have 100s of candidates. Trying out ChatGPT Operator agent to review them all and narrow down a short list. Impressed so far!
20 days ago
4
3
1
Deciding on v1 pricing is so hard. All future pricing decisions are anchored off of whatever number you pick first.
20 days ago
3
3
0
The tradeoffs when choosing a chat space for a paid membership: Slack: Preferred UX. But can't automate onboarding/offboarding synced with membership. Also capped history. Discord: Best for integrated onboarding/offboarding. But that UX 🙄 Anything else: Too uncommon for people to adopt.
add a skeleton here at some point
21 days ago
11
8
1
Do Discord haters (like me) ever come around on it? Or is the kinda thing that you either love or hate (forever).
21 days ago
5
2
2
"Who it's for" This is who my workshop is for next week. And who I'm building Builder Methods for. Just getting started.
22 days ago
1
3
1
Agent OS 2.0 coming along... This version *compiles* your commands and agents into your project. This injects your coding standards, workflows, patterns, so that your agent is all trained up and ready to rock. It works in "Claude Code mode" (uses subagents) or "Any CLI mode" (no subagents).
22 days ago
1
6
0
Is this the beginning of a swell of switchers from Claude Code to Codex CLI? Once Codex (and other CLIs) add sub-agents support, the swell will become a wave. Biggest missing piece imo.
22 days ago
1
1
0
It's opening day for the sweats, hoody and slippers.
23 days ago
1
4
0
This keyboards market is interesting. Pretty diverse playing field. No dominant winners. Lots of variation in products and customer preferences. A lot of creative expression.
add a skeleton here at some point
23 days ago
1
4
0
A pattern I'm using for every project: 1. Describe my proposed idea/strategy. 2. Ask AI to give me clarifying questions, numbered, with suggested assumptions. 3. I reply to each with a simple "yes" or course correction. 4. THEN we build.
24 days ago
1
14
3
You switched from the Apple Keyboard to something better. Which one and why do you like it better?
25 days ago
11
0
1
Here's what writing looks like for me now.
26 days ago
0
1
0
1 hour from now, we're back on the mics for a live recording of The Panel. Come hang! Checking our notes... - first revenue! - kids leaving the nest - effort vs. outcomes - Open source product has traction. Now what? - ...
add a skeleton here at some point
26 days ago
0
4
0
The days of rigid role separation—"designer", "frontend dev", "backend dev"—are over. Today's reality is fluid: designers code, developers need UX context, and features get built across all layers simultaneously. How Agent OS 2.0 will solve this... 🧵
27 days ago
1
10
0
Instead of cold emailing a busy person to ask to "pick their brain", try inviting them on your podcast or youtube. Most are willing, regardless of audience size. Plus you'll get their best, not a rushed 1-line response (or nothing). Don't have one? Start one.
28 days ago
2
9
2
reposted by
Brian Casel
Pascal Laliberté
28 days ago
Hey Rails friends. I'm trying an experiment. Can you help me send this out to our industry friends? "A week of Hotwire Office Hours, so you can finally tweak your Hotwire-based app." Part group training, part accountability, part hangout with friends. Details soon👇
hotwiresupport.pascal.works
loading . . .
Index
A week of office hours to advance on the Hotwire part of your app
https://hotwiresupport.pascal.works/
0
9
20
I'm hosting the live workshop & discussion on the Realities of Building with AI. Current tooling, workflows, and what's changing... First 50 seats are half off (25 left). Sept 16. 2pm ET. Recording available.
buildermethods.com/workshops/bu...
loading . . .
Realities of Building with AI
Builder Methods is a site that helps software developers build better software, faster by leveraging AI. Created by Brian Casel.
https://buildermethods.com/workshops/builder-methods-workshop
28 days ago
0
4
0
A lot of super power when you have marketing chops + software chops. That super power is now within reach for anyone. The bar has never been lower.
add a skeleton here at some point
28 days ago
0
4
0
2 requests for Claude Code's 5-hour limit: 1. At least finish the task or clean up half-written code before cutting off! 2. Let me queue or schedule tasks for it to pick up when the next 5-hour window starts.
29 days ago
0
1
0
With Builder Methods, I'm leaning into ways to use my software skills to power a non-SaaS business model. Tooling and agents to help me with content creation, audience research, surveys, registrations, sales, segmentation... 🤓
29 days ago
0
1
1
Sneak peek at creating a spec using Agent OS 2.0. Planning, researching, writing, verifying accuracy. Designed to setup Claude Code for successful implementation.
about 1 month ago
3
16
3
You're gonna want to say you've been there since issue #1 of my Builder Briefing newsletter. Sending it today. There's still time. Subscribe 👇
loading . . .
Builder Methods | Training for AI-first software developers
Builder Methods is a site that helps software developers build better software, faster by leveraging AI. Created by Brian Casel.
https://buildermethods.com/
about 1 month ago
1
2
0
A key concept in Claude Code: Your main agent relays instructions & responses to/from the subagents—you don't interact with subagents directly. So it's all about managing what context each agent needs to have (and what they shouldn't). This is key to consistency.
add a skeleton here at some point
about 1 month ago
0
7
0
Agent OS 2.0 will include (customizeable) workflows for feature development, with status reports.
about 1 month ago
1
11
1
I'm ~70% into building a new product using Agent OS + Claude Code. It's been a huge learning experience into how agents behave, how to steer them, and make them more predictable. It's crazy how fast the tooling and best practices are changing—and how unsettled they are.
add a skeleton here at some point
about 1 month ago
2
6
0
Subagents in Claude Code are huge deal. It's one of the biggest reasons for Anthropic's lock-in on the developers market (despite their increasingly aggressive token limits). If other CLI agents want to compete, they should add subagents support.
about 1 month ago
3
5
2
đź‘€
about 1 month ago
1
3
1
Are you using a CLI coding agent that's not Claude Code as your daily driver? Which one and why?
about 1 month ago
4
0
0
Load more
feeds!
log in