Docker Sandboxes: Declarative sbxenv.yaml Environments

Overview

sbxenv.yaml (schemaVersion "1", EXPERIMENTAL) declares one local or cloud sandbox environment: the agent, the kits composed onto it, workspace mounts, environment variables, secrets/registries/bindings to provision, MCP servers, ports, launch command, and host-side lifecycle commands. sbx env plan|create|run|exec|rm stand it up and tear it down reproducibly instead of a long flag invocation. This skill owns that file end to end: authoring it from the project's signals, refreshing its kit references, and explaining how it is applied and approved. Decoding is strict — an unknown key anywhere is an error — so check references/env-schema-fields.md before writing a field you are not sure about.

When to use this skill