chore(crucible): drop dead NWN_ROOT rule; auto-detect is the forward rule

README.md

@@ -97,5 +97,5 @@ publish event is a `v*` tag (see `sow-docs/runbooks/ci-trigger-standard.md`).
 
 ## Consumers
 
-How the artifact repos resolve a Crucible binary (and the `NWN_ROOT` rule) is
+How the artifact repos resolve a Crucible binary is
 documented in [`docs/consumer-contract.md`](docs/consumer-contract.md).

docs/consumer-contract.md

@@ -36,17 +36,6 @@ container:
 
 ~~No host install, no `$HOME` layout, no developer machine assumptions.~~
 
-## `NWN_ROOT` rule
-
-Crucible **never guesses `NWN_ROOT` from `$HOME`** (this was a deploy-notes
-pain point). The NWN install/data root is passed explicitly:
-
-- env `NWN_ROOT=/path/to/nwn`, or
-- flag `--nwn-root /path/to/nwn`.
-
-A builder that needs `NWN_ROOT` and receives neither must fail closed with a
-clear message, not fall back to a home-directory default.
-
 ## Determinism
 
 Same inputs → identical output bytes. Consumers may checksum artifacts across

internal/dispatch/dispatch.go

@@ -249,8 +249,8 @@ func usage(w io.Writer) {
 	fmt.Fprintf(w, "  config [args]     inspect/validate effective configuration\n")
 	fmt.Fprintf(w, "  changelog [args]  generate the release changelog\n")
 	fmt.Fprintf(w, "\nBuilders read all inputs from the project tree (nwn-tool.yaml + data/); no\n")
-	fmt.Fprintf(w, "NWN install is required. If a builder ever needs an NWN root, it must be\n")
+	fmt.Fprintf(w, "NWN install is required. A builder that one day needs NWN game data\n")
-	fmt.Fprintf(w, "passed explicitly via NWN_ROOT; crucible never guesses from $HOME. See\n")
+	fmt.Fprintf(w, "auto-detects the install; it never requires a hand-set path. See\n")
 	fmt.Fprintf(w, "docs/consumer-contract.md.\n")
 }