Changelog

Unreleased

Added generic instance DSL for lifecycle-managed compute boundaries with backend selection, nested host endpoints, nested services/resources, and target-scoped content planning.
Added Incus instance backend support for launch/start/delete, proxy port exposure, readiness checks, and demo SSH bootstrap.
Added backend-neutral mix host_kit.instance status|ensure|destroy INSTANCE [config.exs] for declared instance lifecycle.
Added declarative backend options on backend, including block form with option, without leaking backend-specific flags into generic plan/apply.
Added instance lifecycle apply events for launch, port exposure, readiness, and SSH bootstrap progress.
Reworked Livebook demo VM helper to use HostKit instance lifecycle and expose both Caddy and Phoenix demo ports.
Polished Phoenix Livebook to match the explicit Target / Declare / Plan / Deploy / Verify flow with Kino summaries and no hidden apply/verify checkboxes.
Added SSH connection retry policy via ssh retry: ... with apply progress events for retry start/success/exhaustion.
Added negative-path coverage for failed initial SSH connection and mid-apply transport failure handling.
Improved plan/read-error formatting and compact Inspect output for plans, changes, and common resources.

Initial beta release.

Added HostKit host-based CLI targeting with mix host_kit.plan --host NAME config.exs and mix host_kit.apply --host NAME ....
Added host SSH DSL settings, including environment-backed control-plane secrets via secret_env/1.
Added inspectable plan/apply artifacts and package lock workflow.
Added Repology-backed semantic package resolution with cache/rate-limit support.
Added Incus integration helper for Linux-native remote bootstrap tests.
Added mise bootstrap resources for BEAM tool installation.