Provision nh via the shared home profile

Enables programs.nh so the nh CLI helper is available cross-platform
alongside the rest of modules/home/dev-tools.nix, without wiring
NH_FLAKE/etc (those wouldn't reliably reach the shell, since the
dotfiles repo owns bash config, not home-manager).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/openspec/changes/archive/2026-09-29-add-nh/tasks.md b/openspec/changes/archive/2026-09-29-add-nh/tasks.md
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+## 1. Module enablement
+
+- [x] 1.1 Add `programs.nh.enable = true;` to `modules/home/dev-tools.nix`
+- [x] 1.2 Verify `nix eval '.#homeConfigurations."tom@linux".config.programs.nh.enable'` and `nix eval '.#homeConfigurations."tom@darwin".config.programs.nh.enable'` both return `true`
+- [x] 1.3 Verify `nix eval '.#homeConfigurations."tom@linux".config.home.packages'` and `nix eval '.#homeConfigurations."tom@darwin".config.home.packages'` each include the `nh` derivation
+
+## 2. Verification
+
+- [x] 2.1 Run `nix flake check` and confirm it passes
+- [x] 2.2 Run `nix build '.#homeConfigurations."tom@linux".activationPackage'` and `nix build '.#homeConfigurations."tom@darwin".activationPackage'` (or `--dry-run` if this machine can't natively build one of the two targets) and confirm both resolve without evaluation errors
+- [x] 2.3 Run `nix fmt` and confirm `modules/home/dev-tools.nix` is formatted with no diff