Concepts

Read these in order. They define the mental model used everywhere else in the docs.

• Platform overview - hpaPaaS, "in-system programming", what the single fat-jar bundles.
• Polyglot runtime - JavaScript / TypeScript / Java / Python sharing one JVM.
• Repository and workspace - /registry/public/... vs /users/.../workspace/....
• Projects and artefacts - a folder is a project; a file is an artefact.
• The synchronizer model - how files become live runtime state.
• Publish and reconcile - Save → publish → live.
• Multi-tenancy - default on; what's isolated and what isn't.
• Security model - roles, access rules, anonymous mode, super-roles.
• Lifecycle and hot-reload - how edits propagate without redeploy.
• Extensibility - extension points and SPI surfaces.