Yilun | Building TokenAir

Building TokenAir. Learning how AI founders can make every token go further without giving up quality or rebuilding their stack.

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132 users, 3 current customers, and a renewal failure I should have prevented

How are AI product founders keeping token costs from turning into margin risk?

How are AI product founders keeping token costs from turning into margin risk?

We could track every model call and still couldn't price one useful agent result

How are AI product founders keeping token costs from turning into margin risk?

I let an AI agent run my amazon ads for 2 months, sharing the real numbers (they're not great)

How are AI product founders keeping token costs from turning into margin risk?

How are AI product founders keeping token costs from turning into margin risk?

5 days post-launch: Top 50 on Product Hunt, zero signups, and why I think that's actually fine

Show IH: I built an offline AI music generator for iPhone.

Show IH: I was my AI coding agent's memory — so I automated myself out of that job

I let an AI agent run my amazon ads for 2 months, sharing the real numbers (they're not great)

Built a compliance layer for AI agents — logs every tool call, masks PII, holds risky actions for approval

Launched Postessia today — an AI tool that writes LinkedIn posts in your actual voice (not generic AI-speak)

Launched Postessia today — an AI tool that writes LinkedIn posts in your actual voice (not generic AI-speak)

WhatsApp Support Agent. Built on Donely Hermes

We’re giving away up to $6,000 in AI inference with one-click Hermes hosting

Built a compliance layer for AI agents — logs every tool call, masks PII, holds risky actions for approval

Running your own billing on your own tool is the most honest QA there is

Everyone agrees the problem is real. Nobody will actually try the thing that fixes it