Show HN: Treesum – Replace MS Excel/Project with a Code Editor

Category: devtools

Tags: project-planning, outliner, browser-based, vibe-coded, tsum

Score: 5.0/10 (Innovation: 6, Technical: 4, Documentation: 3, Utility: 5)

Treesum is a browser-based tool that replaces Excel/Project for project planning by letting users code an outline and automatically generating sums, graphs, and pivot tables. It uses a human-readable .tsum file and aims to be the Excalidraw of Excel, but is currently a proof of concept with limited polish.

Target audience: project managers, estimators, and developers who prefer text-based planning over GUI tools

Repository: https://www.treesum.app/

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