Native Mix project graphs

Once can now read an existing mix.exs and turn it into a typed, cacheable build graph. Elixir developers can build an application, run formatting and dependency checks, execute tests and Mix tasks, and assemble releases without first translating the project into once.toml.

Native discovery understands locked Hex, Git, path, Mix, and Rebar 3 dependencies. Each package compiles as its own action, so unchanged dependency work can be restored independently from a local or remote cache. The graph also keeps development, test, and production environments separate.

Once uses the Elixir and Erlang versions selected by the project's toolchain configuration while keeping mix.exs and mix.lock authoritative. Umbrella applications and nested Mix projects receive package-qualified targets, and structured diagnostics explain unsupported dependency build managers or missing materialized sources.

Start by running once query native-project mix, inspect the derived targets with once query targets, then use once build, once run, and once test with the target identifiers Once reports.