Kej

Building useful things.
Founder @ Favvy Corp.
First up: AgentBrush →

[Kej @kejlabs]

We're building AgentBrush. Two founders.

It's an image generator that lives inside your AI coding agent. You tell Claude Code "add a hero image," it calls a tool, the asset lands in your repo. You never open an app.

This account is us building it in the open.

[Kej @kejlabs]

@emollick this tracks. managing an agent is just managing a person with no ego :) scope it, define done, catch the drift early. if you can't delegate to humans you won't delegate to agents. the bottleneck was never the model.

[Kej @kejlabs]

AI made shipping fast. The next edge isn't speed, it's soul.
The apps that win next won't just work, they'll feel like someone cared.

[Kej @kejlabs]

You can build a whole SaaS in a weekend with AI now.

The problem: they all come out looking the same, and that vibe-coded look kills trust instantly, at least in my eyes.
The part almost nobody is solving: bringing actual soul into AI-built apps.🧵

[Kej @kejlabs]

That's the exact problem we built https://t.co/E9EGFswdSN to solve.

It's an MCP tool that plugs into your coding agent and generates assets (mascots, OG images, textures) inline, staying consistent by feeding past generations back as references.

Best for anything with a mascot.

[Kej @kejlabs]

@rene_cannao "the real bug is the alert, not the server" is the whole game.
had a redis cache silently degrading under perfectly green dashboards until i added a monitor watching the cache itself, not the request.
you can't alert on the pressure you never instrumented!!

[Kej @kejlabs]

the "guessing" is exactly why the editor exists: mask a region, re-prompt it, iterate on the real image not a fresh roll.
consistency comes from a brand identity kept between gens. alt text is the agent's job, not the tool's.
thanks, good idea though :) we can return it ready to drop in.

[Kej @kejlabs]

We're building AgentBrush. Two founders.

It's an image generator that lives inside your AI coding agent. You tell Claude Code "add a hero image," it calls a tool, the asset lands in your repo. You never open an app.

This account is us building it in the open.

[Kej @kejlabs]

397 commits. 11 weeks.

shipped to v1.1.0, real users, real Stripe money moving.

follow along if you like watching a SaaS get built one hard problem at a time.

[Kej @kejlabs]

What you'll get here:

the real engineering. atomic billing, async queues, auth seams, Cloudflare limits we hit face-first, Stripe edge cases that cost us days.

no growth-hacking threads. no "10x your X." just the actual build.

[Kej @kejlabs]

The bet behind it:
AI-built sites look soulless because there's no visual identity baked into the dev workflow. The agent can write the code but it can't see.
AgentBrush is the part that gives the agent eyes and a brand.

[Kej @kejlabs]

@levelsio the pattern across every vibe jam winner: it's never the one with the best mechanics, it's the one with a character you remember. code got commoditized, the art and the vibe are the moat now. a capybara delivery driver is exactly that!!

[Kej @kejlabs]

@dee_naliaks the unlock isn't more models, it's specialized tools. the agent writing your code literally can't see or make an image. give it a tool for that and the "team of agents" suddenly does things one model never could.