infra: Ensure root flake evaluates nested CLI rust-overlay wiring

Forward `rust-overlay` through root flake inputs into the nested
  `cli` flake and refresh lock wiring so root `nix flake check`
  can evaluate CLI checks.
Also add app metadata descriptions and reuse setup embedded-asset
  iterator in install flow to remove non-blocking check/build warnings.

Author: davidabram

cli/flake.nix

@@ -60,6 +60,9 @@
         apps.sce = {
           type = "app";
           program = "${scePackage}/bin/sce";
+          meta = {
+            description = "Run the packaged sce CLI";
+          };
         };
 
         checks.cli-setup-command-surface = rustPlatform.buildRustPackage {

cli/src/services/setup.rs

@@ -170,11 +170,12 @@ where
 
     for concrete_target in concrete_targets_for(target) {
         let concrete_target = *concrete_target;
-        let assets = assets_for_target(concrete_target);
+        let assets: Vec<&'static EmbeddedAsset> =
+            iter_embedded_assets_for_setup_target(concrete_target).collect();
         let result = install_assets_for_concrete_target_with_rename(
             repository_root,
             concrete_target,
-            assets,
+            &assets,
             &mut rename_fn,
         )?;
         target_results.push(result);
@@ -186,7 +187,7 @@ where
 fn install_assets_for_concrete_target_with_rename<F>(
     repository_root: &Path,
     target: SetupTarget,
-    assets: &'static [EmbeddedAsset],
+    assets: &[&'static EmbeddedAsset],
     rename_fn: &mut F,
 ) -> Result<SetupInstallTargetResult>
 where
@@ -247,7 +248,7 @@ where
     })
 }
 
-fn write_assets_to_staging(staging_root: &Path, assets: &'static [EmbeddedAsset]) -> Result<()> {
+fn write_assets_to_staging(staging_root: &Path, assets: &[&'static EmbeddedAsset]) -> Result<()> {
     for asset in assets {
         validate_embedded_relative_path(asset.relative_path)?;
         let destination = staging_root.join(asset.relative_path);
@@ -363,14 +364,6 @@ fn concrete_targets_for(target: SetupTarget) -> &'static [SetupTarget] {
     }
 }
 
-fn assets_for_target(target: SetupTarget) -> &'static [EmbeddedAsset] {
-    match target {
-        SetupTarget::OpenCode => OPENCODE_EMBEDDED_ASSETS,
-        SetupTarget::Claude => CLAUDE_EMBEDDED_ASSETS,
-        SetupTarget::Both => unreachable!("both is not a concrete embedded target"),
-    }
-}
-
 fn cleanup_path_if_exists(path: &Path) {
     let cleanup_result = if path.is_dir() {
         fs::remove_dir_all(path)

context/architecture.md

@@ -4,16 +4,19 @@
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
     flake-utils.url = "github:numtide/flake-utils";
+    rust-overlay.url = "github:oxalica/rust-overlay";
     cli.url = "path:./cli";
     cli.inputs.nixpkgs.follows = "nixpkgs";
     cli.inputs.flake-utils.follows = "flake-utils";
+    cli.inputs.rust-overlay.follows = "rust-overlay";
   };
 
   outputs =
     {
       self,
       nixpkgs,
       flake-utils,
+      rust-overlay,
       cli,
     }:
     flake-utils.lib.eachDefaultSystem (
@@ -214,6 +217,9 @@
         apps.sync-opencode-config = {
           type = "app";
           program = "${syncOpencodeConfigApp}/bin/sync-opencode-config";
+          meta = {
+            description = "Regenerate and sync config/.opencode outputs";
+          };
         };
 
         devShells.default = pkgs.mkShell {