Provision nodejs/python3/unzip for mason.nvim installers

mason.nvim (externally-managed Neovim dotfiles config) was failing to
install several LSP servers and tools because npm, python3, and unzip
weren't on PATH in the Home Manager profile.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BBSd4VBfoKHjE1HR3P8kmn

1 files changed, 20 insertions, 0 deletions

diff --git a/openspec/changes/fix-mason-installer-deps/tasks.md b/openspec/changes/fix-mason-installer-deps/tasks.md
new file mode 100644
index 0000000..2d2d259
--- /dev/null
+++ b/openspec/changes/fix-mason-installer-deps/tasks.md
@@ -0,0 +1,20 @@
+## 1. Provision editor toolchain packages
+
+- [x] 1.1 In `modules/home/editor.nix`, add `nodejs`, `python3`, and `unzip` to the
+      existing `home.packages` list (alongside `tree-sitter`/`stdenv.cc`), with a
+      short comment noting they're required by `mason.nvim`'s installers; verify by
+      reading the file back and confirming the three entries are present.
+- [ ] 1.2 Verify the flake still evaluates: run `nix flake check` and confirm it
+      succeeds.
+
+## 2. Verify Mason installs succeed
+
+- [ ] 2.1 Apply the profile on an affected host (`home-manager switch --flake
+      .#tom@linux` or `.#tom@darwin`, whichever is reachable) and confirm the
+      activation completes without error.
+- [ ] 2.2 In Neovim, delete `~/.local/state/nvim/mason.log` (or run `:MasonUninstallAll`
+      then reinstall), trigger installation of the previously-failing packages
+      (`pyright`, `bash-language-server`, `debugpy`, `terraform-ls`,
+      `yaml-language-server`, `typescript-language-server`, `css-lsp`, `html-lsp`),
+      and confirm `:Mason` reports them all installed with no `npm`/`python3`/`unzip`
+      "could not find executable" errors in the new log.