Architecture on AIBussin — AI applications, systems and books

Four Ways to Change Pi

Fri, 02 Oct 2026 09:00:00 +0100

You keep typing the same three lines before every code review. Then you notice the same file appearing in three repositories. Then someone asks for a /review-tests command and you write forty lines of TypeScript to expand a string.

Every one of those three moves was available. Pi’s documentation gives a one-line rule for choosing between them — quickstart.md says to start with the least powerful mechanism that meets your need — and then leaves the reader to guess what “least powerful” means at three in the afternoon.

Warranted Search: When AI Must Prove Before It Looks

Tue, 02 Jun 2026 18:54:26 +0100

TL;DR

Modern AI systems often retrieve nearby text and generate confident answers, but that is not the same as proof. A citation can be real, the answer can be correct, and the evidence can still fail to support the claim.

This post argues for warranted search: a scoped, claim-driven form of intelligent grep. Instead of asking an AI to rummage through a corpus, we give it a specific claim, a bounded search warrant, and a limited set of safe operations.

Cognitive Graphs: A General Architecture for Replayable Reasoning

Mon, 11 May 2026 10:50:29 +0100

A Cognitive Graph is an enhanced chat log one that doesn’t just record what was said, but structurally preserves how thoughts, decisions, alternatives, and artifacts evolve over time, making the whole history replayable and auditable.

TL;DR: A Cognitive Graph turns AI-assisted work from lossy chat logs into event-sourced, replayable reasoning state. Instead of preserving only the final output, it preserves the decisions, alternatives, rationales, mutations, hashes, and snapshots that explain how the output came to exist.