PC_Workman / blog
Friday Shipped & Scarred · #5

I Was Going to Plug in Claude. I Built My Own Engine.

Not everyone wants cloud AI. The app needs to be smart on its own first.

By Marcin Firmuga·2026-04-24·2 min read·Friday Shipped & Scarred #5

I was supposed to plug the Claude API into my chatbot. Instead I built my own AI engine from scratch.

Monday's plan had four tasks — simple, realistic. Here's what actually happened across six retail shifts and one Wednesday off.

Planned → shipped

Unplanned — and shipped anyway

A new hybrid AI engine for hck_GPT. Not an LLM — a rule-based command parser that actually tries to understand what the user is asking. More commands, better intent detection, built to be the default AI core. Ollama integration comes around v1.8–1.9 for anyone who wants a real local LLM (heavy in the background, so it'll be opt-in — PC Workman itself stays under 1% CPU).

Why build this instead of just plugging in Claude? Because not every user has an API key, and not everyone wants cloud AI. The app needs to be smart on its own first. External AI is the upgrade, not the foundation.

The hck_GPT chat banner also got completely rebuilt in the dark bordeaux style. I don't know how long it looked that rough — months, probably. Nobody told me. I didn't notice until this week.

Scarred: 4:30 AM bike rides to Żabka, 9-hour shifts at 21 zł/h, home, code, sleep, repeat. Wednesday was the only real dev day and I burned every hour of it. The Claude API delay stings — but security isn't optional and I'm not cutting corners on it.

Three of four planned tasks shipped, plus an entire AI engine nobody asked for. Sometimes the best features are the ones you didn't plan. v1.7.2 .exe releases this weekend.

BuildInPublicAIPython
This is the project behind the post. PC Workman is a free, open-source Windows system monitor with an offline AI assistant - everything described here is real, shipped code. Download it or read the source.
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MF

Marcin Firmuga

Solo developer · HCK_Labs · building PC Workman in public

Every edition is written from that week's real commits. Newest posts premiere on LinkedIn - the archive lives here. More about me: my story.