Pawmc

A personal LLM assistant that runs on Cloudflare Workers and maintains a user-guided compounding knowledge base across conversations.

When starting a new conversation, choose which historical context you want it to have by choosing a diary and topic. Additional context from new chats is compounded daily or on request.

It's simple and lightweight, and you own your data, pick your model, and control the prompts.

Try it without deploying: the guided demo is a scripted walkthrough of the diary experience — no LLM is running and no data is recorded; it runs on a separate demo instance.

Related writing

• Dear LLM, or how I stopped getting generic advice — the story behind pawmc
• Design before building, or my first finished product — on development process behind pawmc's latest version
• Making LLMs not eat my food, or how I picked up TS — on migrating pawmc to TS
• Development updates on X — tiny thoughts as I develop pawmc

Key advantages

Compounding context that works

Pawmc asks for a little effort from a user, but the result is predictability of compounding context. Every time you start a chat, you must select a "diary" and "topic" (existing or new) and that's exactly where the context will compound.

Over time, when you gather context about your fields of interest, you will have multiple context options to use as a background for your new chats. (e.g. "personal", "project-x", "hobby-y", "philosophy")

Simplicity

It's a great relief to use an LLM that doesn't have search-access and a system prompt of 200–1500 (!) lines. Pawmc's system prompt is one short sentence, focused on getting the point across.

Control over data

You deploy the software, you control the database. The database includes all your conversations and summaries. You can redact your summaries, you can redact your prompts, you can change the model.

In an ideal world, you would also control the LLM deployment, but as of mid-2026 most of us can't host a cutting-edge LLM on a private machine. It's the main tradeoff - prompts are still sent to the companies that host LLMs.

Cost

Deploying and hosting Pawmc on Cloudflare is way under their free tier limits, and you even get some free daily tokens with Workers AI.