
Ivan Mojsilovic
2.6K posts

Ivan Mojsilovic
@Mojsilovic
Ex hacker turned hustler. Now hacking again! CTO at @WellPrept















GitHub — version control (free) Claude — coding ($20/mo) Namecheap — domain ($12/yr) Cloudflare — DNS (free) Vercel — deploy (free) Clerk — auth (free) Supabase — backend + database (free) Upstash — Redis (free) Pinecone — vector DB (free) Resend — emails (free) Stripe — payments (2.9% per transaction) PostHog — analytics (free) Sentry — error tracking (free) Total cost to run a startup: ~$20/month No servers. No DevOps team. No funding required. Just an idea and WiFi. There has never been a cheaper time to build. 🚀 Today is the best time to bet on yourself and build the things ⭐

Introducing Cline Kanban: A standalone app for CLI-agnostic multi-agent orchestration. Claude and Codex compatible. npm i -g cline Tasks run in worktrees, click to review diffs, & link cards together to create dependency chains that complete large amounts of work autonomously.


Issue tracking is dead. We are building what comes next. linear.app/next


Claude Cowork can apply to 50 jobs in under 30 minutes. Here's how to set it up.


Evals are the new PRD. The companies building AI products that actually work are running 12.8 eval experiments per day. Here is the playbook with @ankrgyl, Founder and CEO of @braintrust ($800M valuation, behind Vercel, Replit, Ramp, Zapier, Notion, Airtable): ⏱ 1:43 Why vibe checks stop scaling ⏱ 6:35 Evals are the new PRD ⏱ 8:45 The Claude Code evals controversy ⏱ 18:48 Building an eval live from zero ⏱ 29:51 Connecting Linear MCP and iterating ⏱ 39:12 Why you need evals that fail ⏱ 43:36 Offline vs online evals ⏱ 47:40 Three mistakes killing eval culture The core framework: every eval is exactly three things. A set of inputs your product needs to handle. A task that takes those inputs and generates outputs. A scoring function that produces a number between 0 and 1. We built one from scratch on camera. Score went from 0 to 0.75 in under 20 minutes.












Having Claude ask Codex for a second opinion when it gets stuck is mindblowing. I watch along as they have a little a conversation and the bug is fixed. I am firmly relegated to third place.







Yep, Composer 2 started from an open-source base! We will do full pretraining in the future. Only ~1/4 of the compute spent on the final model came from the base, the rest is from our training. This is why evals are very different. And yes, we are following the license through our inference partner terms.




