Willison tests Claude Code Ultracode by building a SQLite SPARQL extension
A mistyped phone prompt still led Ultracode to coordinate subagents toward a Rust extension called sparqlite.
5 stories, newest first · one card per story
A mistyped phone prompt still led Ultracode to coordinate subagents toward a Rust extension called sparqlite.
Mosaic improves multi-session agentic RL by crediting session contributions instead of broadcasting trajectory advantages.

Anthropic explains how to prompt, steer, and check long Claude Opus 5.5 runs in Claude and Claude Code.
An OpenAI Codex user says one task spawned 826 agents and burned about $79,000 without authorization.

Exa launched Agent Ultra, a hosted subagent research API it says leads four deep-research benchmarks.
Today 1.6K readers · 2.5K views · 778 reads · all time 189K views