Open, self-hosted, IFC-native AEC platform: web BIM viewer + modeling, a ~100-module GC portal (RFIs, pay apps, CPM, construction accounting — double-entry GL/WIP → QuickBooks, e-sign), AI assist, IDS authoring, estimating + embodied carbon, a development proforma, and operate/dispose (CMMS, facility condition, rent roll, waterfall).
Latest release v0.3.1133 — Massing v0.3.1133 · 1 Sept 2026
9 files for Claude Code, Codex and OpenCode: PostToolUse, massing, backend-tests, master-builder and 5 more — 12,117 tokens loaded in every session.
AGENTS.md A 1,132 tok CLAUDE.md A 10,985 tok .claude/settings.json A — .claude/settings.json A — .claude/skills/backend-tests/SKILL.md C 69 tok .claude/skills/master-builder/SKILL.md A 211 tok .claude/skills/security-monitoring/SKILL.md A 65 tok .claude/skills/ship-release/SKILL.md A 74 tok .claude/skills/verify-frontend/SKILL.md A 73 tok These files are ibuilder/massing's own configuration — they tell Claude Code, Codex and OpenCode how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.