Base Bash documentation

The current documentation version is v2. It describes the clean-break base_ API and the professional application contract. Pre-v2 material is historical and unsupported; use the v1.4.0 → v2 migration guide when updating an existing script.

Start here

• Five-minute quickstart
• Architecture and execution model
• API reference and v2 API contract
• Configuration, lifecycle, and status contracts
• Testing, vendoring, bundling, and release
• CI and default-branch policy
• Support and threat model · security reporting

The quickstart is deliberately pinned to an immutable release ref. It never uses the moving default branch or an unreleased main checkout.