diff --git a/AGENTS.md b/AGENTS.md
index cfd0082..cb113c5 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -42,6 +42,11 @@ W → w    Wq/WQ → wq    Wqa/WQa/WQA → wqa    Q → q    Qa/QA → qa
 
 Add new aliases to the `pairs({…})` table — one line, no boilerplate.
 
+**Mason LSP servers** — `pyright` and `bash-language-server` are npm-based.
+They are wrapped in `vim.fn.executable('npm') == 1` so hosts without npm (e.g.
+GPU servers) skip them silently. Do not remove this guard or add new npm-dependent
+servers outside of it.
+
 ## Version bump rules
 
 - `fix:` commits → patch (`X.Y.Z+1`)
diff --git a/CHANGELOG.md b/CHANGELOG.md
index e049061..291e245 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,20 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.5.1] - 2026-05-06
+
+### Fixed
+- `nvim/init.lua`: Mason no longer attempts to install `pyright` and
+  `bash-language-server` on hosts without npm/Node.js. Both servers use npm as
+  their install backend; the unconditional `ensure_installed` caused two noisy
+  failure messages on every Neovim launch on GPU servers. They are now guarded
+  behind `vim.fn.executable('npm') == 1`. Resolves #23.
+
+### Changed
+- `CLAUDE.md`, `AGENTS.md`: documented the Mason npm-conditional LSP server
+  guard so agents and humans know not to remove it or add new npm-dependent
+  servers outside of it.
+
 ## [1.5.0] - 2026-05-05
 
 ### Added
diff --git a/CLAUDE.md b/CLAUDE.md
index 498c881..1470531 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -292,6 +292,13 @@ common Ex commands so accidental Shift-holding doesn't fail:
 Add new aliases to the `pairs({…})` table at the bottom of `init.lua` — one line,
 no per-command boilerplate.
 
+**Mason LSP servers** — `pyright` and `bash-language-server` are installed by
+Mason via npm. The config guards them behind `vim.fn.executable('npm') == 1` so
+`ensure_installed` only includes them when npm is present on the host. Hosts
+without Node.js (e.g. GPU servers) still get `clangd` and `lua_ls` (no npm
+needed). Do not remove this guard or add other npm-dependent servers without
+wrapping them in the same check.
+
 ---
 
 ## fzf integration
diff --git a/VERSION b/VERSION
index bc80560..26ca594 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.5.0
+1.5.1
diff --git a/nvim/.config/nvim/init.lua b/nvim/.config/nvim/init.lua
index 1c66a4a..e44a702 100644
--- a/nvim/.config/nvim/init.lua
+++ b/nvim/.config/nvim/init.lua
@@ -142,13 +142,16 @@ require('lazy').setup({
       -- Server configs defined once; registration method differs by nvim version.
       -- nvim 0.11+: vim.lsp.config/enable (new built-in API, no lspconfig on_attach)
       -- nvim 0.9–0.10: lspconfig.server.setup() (classic API)
-      local servers = {
+      -- pyright and bashls install via npm; skip ensure_installed on hosts without npm.
+      local npm_servers = vim.fn.executable('npm') == 1 and {
         pyright = {
           capabilities = capabilities,
           settings = { python = { analysis = { useLibraryCodeForTypes = true } } },
         },
-        clangd = { capabilities = capabilities },
         bashls = { capabilities = capabilities },
+      } or {}
+      local servers = vim.tbl_extend('force', {
+        clangd = { capabilities = capabilities },
         lua_ls = {
           capabilities = capabilities,
           settings = {
@@ -159,7 +162,7 @@ require('lazy').setup({
             },
           },
         },
-      }
+      }, npm_servers)
 
       if vim.fn.has('nvim-0.11') == 1 then
         require('mason-lspconfig').setup({