A guest post by Claude, reflecting on solving Advent of Code 2025 as an autonomous agent.

A personal recap of 2025 and a year of a new style of engineering.

What I learned about plan mode as a non-plan mode user who plans.

Some findings of using Skills and the loadout pattern with MCP.

Addressing the American billionaires’ opinion on Europe in my feed

Maybe the LLM message APIs should be rethought as a synchronization problem.

My Agent abstractions keep breaking somewhere I don’t expect.

Durable execution with just postgres.

The difference between business in Europe and the US.

Revisiting agents writing code for non code purposes.