diff --git a/.claude-plugin/marketplace.json b/.claude-plugin/marketplace.json
index 3bacce7..2d90925 100644
--- a/.claude-plugin/marketplace.json
+++ b/.claude-plugin/marketplace.json
@@ -1,6 +1,6 @@
 {
   "name": "wisdom",
-  "version": "3.0.0",
+  "version": "3.0.1",
   "owner": {
     "name": "cmj",
     "url": "https://github.com/cmj0121"
@@ -9,7 +9,7 @@
     {
       "name": "wisdom",
       "description": "Single-purpose skills to plan, build, review and ship software, led by smith.",
-      "version": "3.0.0",
+      "version": "3.0.1",
       "source": "./plugins/wisdom"
     }
   ]
diff --git a/README.md b/README.md
index e55f2e0..0e1f5fa 100644
--- a/README.md
+++ b/README.md
@@ -68,6 +68,7 @@ other skills in turn. Every skill also works on its own.
 | `audit`     | Audit dependencies for known vulnerabilities and staleness | `audit deps` |
 | `ops`       | Review operational readiness before a release              | `ops review` |
 | `challenge` | Argue against a plan and name its blind spots              | `tenth man`  |
+| `lsp`       | Say whether the repo needs a language server, and which    | `need lsp`   |
 
 ### Output
 
diff --git a/README.zh-TW.md b/README.zh-TW.md
index 7446e9f..2ef03d4 100644
--- a/README.zh-TW.md
+++ b/README.zh-TW.md
@@ -65,6 +65,7 @@ v3 從零重寫，圍繞三條規則。
 | `audit`     | 稽核相依套件的已知漏洞與過期版本 | `audit deps` |
 | `ops`       | 發佈前審查維運就緒程度           | `ops review` |
 | `challenge` | 反對一項計畫，點出其盲點         | `tenth man`  |
+| `lsp`       | 判斷專案是否需要 language server | `need lsp`   |
 
 ### 輸出
 
diff --git a/plugins/wisdom/.claude-plugin/plugin.json b/plugins/wisdom/.claude-plugin/plugin.json
index 71f1bae..f2e574c 100644
--- a/plugins/wisdom/.claude-plugin/plugin.json
+++ b/plugins/wisdom/.claude-plugin/plugin.json
@@ -1,7 +1,7 @@
 {
   "name": "wisdom",
   "description": "Single-purpose skills to plan, build, review and ship software, led by smith.",
-  "version": "3.0.0",
+  "version": "3.0.1",
   "license": "MIT",
   "author": {
     "name": "cmj",
diff --git a/plugins/wisdom/skills/lsp/SKILL.md b/plugins/wisdom/skills/lsp/SKILL.md
new file mode 100644
index 0000000..c5ba7e5
--- /dev/null
+++ b/plugins/wisdom/skills/lsp/SKILL.md
@@ -0,0 +1,67 @@
+---
+name: lsp
+description: Checks whether a repo is large and typed enough for a language server to pay off, and names the official LSP plugin to enable. Use before heavy code work.
+license: MIT
+metadata:
+  shortcut: "need lsp"
+---
+
+# LSP
+
+Decide whether enabling a language server is worth it for this repo. A language server gives
+the agent go-to-definition, find-references and post-edit diagnostics: fewer broad greps and
+whole-file reads, and type errors caught before a build. It only pays off where there is
+enough typed code to navigate. Report — never install a plugin, a binary or a setting.
+
+## Steps
+
+1. **Count source files** per language with `git ls-files`, so vendored and ignored files
+   stay out. Map extensions with the table below; anything else is not a candidate.
+
+   | Language | Extensions            | Plugin              | Binary                       |
+   | -------- | --------------------- | ------------------- | ---------------------------- |
+   | TS / JS  | `.ts .tsx .js .jsx`   | `typescript-lsp`    | `typescript-language-server` |
+   | Python   | `.py .pyi`            | `pyright-lsp`       | `pyright-langserver`         |
+   | Go       | `.go`                 | `gopls-lsp`         | `gopls`                      |
+   | Rust     | `.rs`                 | `rust-analyzer-lsp` | `rust-analyzer`              |
+   | C / C++  | `.c .h .cpp .cc .hpp` | `clangd-lsp`        | `clangd`                     |
+   | C#       | `.cs`                 | `csharp-lsp`        | `csharp-ls`                  |
+   | Java     | `.java`               | `jdtls-lsp`         | `jdtls`                      |
+   | Kotlin   | `.kt .kts`            | `kotlin-lsp`        | `kotlin-lsp`                 |
+   | Swift    | `.swift`              | `swift-lsp`         | `sourcekit-lsp`              |
+   | Ruby     | `.rb .rake .erb`      | `ruby-lsp`          | `ruby-lsp`                   |
+   | PHP      | `.php`                | `php-lsp`           | `intelephense`               |
+   | Lua      | `.lua`                | `lua-lsp`           | `lua-language-server`        |
+
+   Plugins come from the `claude-plugins-official` marketplace. If its catalogue is cached
+   locally, check it for the current names before trusting this table.
+
+2. **Judge each language.** Worth it when the language has **100 or more** files, or fewer
+   but one package with deep cross-file calls (a monorepo of small files counts). Not worth
+   it for a repo that is mostly Markdown, YAML or shell, or for a language under 20 files.
+   The numbers are a rule of thumb; say so when a language sits near them.
+
+3. **Check what is already on.** For each worth-it language:
+   - **Plugin enabled:** `<plugin>@claude-plugins-official` is `true` under `enabledPlugins`
+     in `~/.claude/settings.json`, `.claude/settings.json` or `.claude/settings.local.json`.
+     An `LSP` tool in this session means at least one server is loaded.
+   - **Binary installed:** `command -v <binary>`. The plugin does not ship it; without it
+     the plugin loads and reports "Executable not found in $PATH" under `/plugin` → Errors.
+
+## Output
+
+One row per language that has any files, largest first:
+
+| Language | Files | Worth it? | Plugin | Enabled | Binary |
+| -------- | ----- | --------- | ------ | ------- | ------ |
+
+Then, for each worth-it language not fully on, the missing steps only:
+
+```text
+/plugin install <plugin>@claude-plugins-official
+```
+
+and that `<binary>` must be installed on `PATH` with the language's own toolchain — see the
+plugin's README. Restart the session after enabling so the server loads.
+
+End with one sentence: enable LSP for which languages, or not needed and why.