checklisted

# /anvil:check Run the static gate over a Nix-defined environment: every shell file checked with the right parser for its dialect, then the configuration evaluated. Nothing is built and nothing changes state. ## Scope The repo is in scope when it has a `flake.nix` declaring `homeConfigurations` or `nixosConfigurations`, a `configuration.nix`, a `devenv.nix`, or a `scripts/` tree of shell files. Absent all of those, say the repo is out of scope and stop. ## Discover Find every shell file the repo owns, including scripts embedded in Nix through `writeShellApplication`. Detect each file's dialect from its shebang, extension, and location (a `fish/` tree is fish). Detect the interactive shell the configuration declares (`programs.fish.enable`, `programs.zsh.enable`, a `fish/` or `zsh/` tree, shebangs, `$SHELL` as a runtime fallback). Never ask the owner and never run one tool over everything. ## Gates per dialect Pick the gate by dialect. The `shell-dialects` skill holds the differences and the reason this table exists: shellcheck cannot parse fish, and trusting its false errors on correct fish breaks working shell. | Dialect | Gate | | --- | --- | | bash, sh | `shellcheck -x` plus `bash -n` | | fish | `fish -n`, plus `fish_indent --check` when the repo uses it | | zsh | `zsh -n` | Then evaluate: `nix flake check` for a flake, an evaluation of the configuration otherwise. Build nothing. ## Report Rank findings by whether they fail loudly or silently. A crash gets fixed