Pulsar is a new coding-first IDE for Pharo showcased at ESUG 2026 that argues staying close to code remains essential even as generative agents reshape development workflows. The core claim is that programming tools must help programmers understand, navigate, and change a system directly in the code; generative tools can assist but do not replace those capabilities. The presentation demonstrated Pulsar’s current state, its design goal of supporting real working sessions to grow power users, and provided slides and video. Pulsar won first prize at ESUG 2026 and is available for use and feedback in pre‑alpha form (repository: forge.smallworks.eu/pharo/Pulsar).
Concrete advances and integrations illustrate that direction: a new F-strings implementation brings readable string interpolation to Pulsar and Pharo with AST support, debugger integration, backward compatibility, and a path toward Pharo 15; a Git Rivera integration generates commit graphs lazily on demand to speed and scale history browsing for large repositories. The project is explicitly seeking people to use it, break it, and contribute improvements as it evolves from a usable work‑in‑progress into a mature, coding-oriented IDE.
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