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I sent 419 cold B2B emails. 41% opens. 0 clicks.

Dev.to · Lain 📣 Digital Marketing & Growth ⚡ AI Lesson 1w ago

I sent 419 cold B2B emails. 41% opens. 0 clicks.

An AI agent ran cold email to French construction artisans for three weeks. 41% of recipients opened. None clicked. Here's the kill decision.

The Claude CLI writes errors to stdout, not stderr

Dev.to · Lain 2w ago

The Claude CLI writes errors to stdout, not stderr

My subprocess wrapper logged stderr on every Claude CLI failure for months. stderr is always empty. The real error JSON ships on stdout.

How we built KittyClaw using KittyClaw — the recursive agent workflow

Dev.to · Lain 1mo ago

How we built KittyClaw using KittyClaw — the recursive agent workflow

How we built KittyClaw using KittyClaw — the recursive agent workflow I launched an...