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The mkdir blog

Playbooks for growing a B2B business.

Notes from the founders on finding the right buyers, reaching them, and the AI that does the repetitive work.

Latest

Precast Concrete Lead Generation: Win More Bids in 2026

Precast concrete lead generation for plants: who buys inside your delivery radius, how to get on the spec, and how to reach estimators before bid day.

Lead GenerationNov 20268 min read

Email Sender Reputation and Warmup, Explained for 2026

Email sender reputation decides if your mail reaches the inbox. What Gmail and Outlook measure, how to check yours, what warmup does and how to recover.

Nov 20269 min read

Auto Merge Pull Requests After Checks Pass (2026)

How we auto merge pull requests once the build check passes, with a 170 line webhook handler: signature check, file blocklist, sha guard, dry run.

Nov 20268 min read

AI Assistant for Company Documents: Build or Buy (2026)

An AI assistant for company documents answers from your own files. When the one in your office suite is enough, and when a custom build pays off.

Nov 20268 min read

Reduce Serverless Bundle Size: How We Cut Ours by 36%

How we reduce serverless bundle size on our own site: measure first, then move work to build time. 2,940 to 1,871 KiB against a 3 MiB cap.

Oct 20268 min read

Contact Form Spam Protection: What Our API Checks

Contact form spam protection, shown through the ten checks our own two form endpoints run before any email is sent, and what each one stops.

Oct 20269 min read

Custom CRM vs Off-the-Shelf: How to Decide in 2026

Custom CRM vs off-the-shelf: buy when your team fits a standard pipeline, extend it when it almost fits, build when the work happens off a desk.

Oct 20268 min read

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47 more playbooks and write-ups.

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Varun BagrodiaDheer GuptaVarun and Dheerthe foundersBook a call