Code intelligence plugins changedplugins/code-intelligence
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99> [!NOTE]
1010>
11> Code intelligence plugins work in terminal sessions. In [cloud sessions](/docs/en/claude-code-on-the-web.md), Claude Code doesn't start plugin language servers, so Claude gets no diagnostics or code navigation there. To write your own language server plugin, or to connect a language server that has no plugin, see [LSP servers in plugin components](/docs/en/plugins/components.md#lsp-servers).
11> Code intelligence plugins work in terminal sessions. In [cloud sessions](https://code.claude.com/docs/en/claude-code-on-the-web.md), Claude Code doesn't start plugin language servers, so Claude gets no diagnostics or code navigation there. To write your own language server plugin, or to connect a language server that has no plugin, see [LSP servers in plugin components](https://code.claude.com/docs/en/plugins/components.md#lsp-servers).
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13To get started, find your language in the table under [Install a code intelligence plugin](#install-a-code-intelligence-plugin). The plugins in that table come from Anthropic's [official plugin marketplace](/docs/en/plugins/anthropic-marketplaces.md).
13To get started, find your language in the table under [Install a code intelligence plugin](#install-a-code-intelligence-plugin). The plugins in that table come from Anthropic's [official plugin marketplace](https://code.claude.com/docs/en/plugins/anthropic-marketplaces.md).
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1515If you already saw an **LSP plugin recommendation** dialog, see [Accept or dismiss the recommendation dialog](#accept-or-dismiss-the-recommendation-dialog) for what each choice does.
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4646
4747**2. Install the plugin**
4848
49In the VS Code extension or the desktop app, follow [Install a plugin](/docs/en/plugins/install.md#install-a-plugin) instead of this step. In a terminal, start Claude Code by running `claude`, then enter this at its prompt, replacing `typescript-lsp` with the plugin the step 1 table lists for your language:
49In the VS Code extension or the desktop app, follow [Install a plugin](https://code.claude.com/docs/en/plugins/install.md#install-a-plugin) instead of this step. In a terminal, start Claude Code by running `claude`, then enter this at its prompt, replacing `typescript-lsp` with the plugin the step 1 table lists for your language:
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5151```
5252/plugin install typescript-lsp@claude-plugins-official
5353```
5454
55A confirmation message says whether the plugin is active now or needs `/reload-plugins`. If the install fails with `Marketplace "claude-plugins-official" not found`, see the [troubleshooting entry for that error](/docs/en/plugins/troubleshooting.md#marketplace-claude-plugins-official-not-found). To control where the plugin is installed, or to run the install from your shell instead of inside Claude Code, see [Install plugins](/docs/en/plugins/install.md).
55A confirmation message says whether the plugin is active now or needs `/reload-plugins`. If the install fails with `Marketplace "claude-plugins-official" not found`, see the [troubleshooting entry for that error](https://code.claude.com/docs/en/plugins/troubleshooting.md#marketplace-claude-plugins-official-not-found). To control where the plugin is installed, or to run the install from your shell instead of inside Claude Code, see [Install plugins](https://code.claude.com/docs/en/plugins/install.md).
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5757**3. Confirm the server starts**
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6868With a language server running, Claude gains diagnostics and code navigation:
6969
7070* **Diagnostics after edits**: each time Claude edits or writes a file the server handles, Claude gets the errors and warnings the server reports. It sees a type error, missing import, or syntax error it introduced without running a compiler.
71* **Code navigation**: Claude gets an `LSP` tool that looks up symbols through the server instead of searching text for them. The tool is read-only. For what Claude can look up with the tool and how permissions apply to it, see [LSP tool behavior](/docs/en/tools-reference.md#lsp-tool-behavior).
71* **Code navigation**: Claude gets an `LSP` tool that looks up symbols through the server instead of searching text for them. The tool is read-only. For what Claude can look up with the tool and how permissions apply to it, see [LSP tool behavior](https://code.claude.com/docs/en/tools-reference.md#lsp-tool-behavior).
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7373### Read the diagnostics yourself
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8585* **A plugin matches the file**: one of the marketplaces you've added, or the official marketplace Claude Code registered for you, lists a code intelligence plugin for that file's extension, and the plugin's binary is installed.
8686* **Official first**: when more than one marketplace offers a plugin for the extension, the dialog offers the official marketplace's plugin.
8787* **Once per session**: the dialog appears at most once in a session, for the first matching file Claude edits.
88* **Not for cloud sessions**: the dialog never appears when your terminal is attached to a cloud session, such as one you started with [`claude --cloud`](/docs/en/claude-code-on-the-web#from-terminal-to-cloud).
88* **Not for cloud sessions**: the dialog never appears when your terminal is attached to a cloud session, such as one you started with [`claude --cloud`](https://code.claude.com/docs/en/claude-code-on-the-web#from-terminal-to-cloud).
8989
9090### Respond to the recommendation dialog
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107107
108108## Troubleshoot code intelligence
109109
110The plugins troubleshooting page covers the symptoms specific to code intelligence plugins under [Language server doesn't start, uses too much memory, or reports wrong diagnostics](/docs/en/plugins/troubleshooting.md#language-server-doesnt-start):
110The plugins troubleshooting page covers the symptoms specific to code intelligence plugins under [Language server doesn't start, uses too much memory, or reports wrong diagnostics](https://code.claude.com/docs/en/plugins/troubleshooting.md#language-server-doesnt-start):
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112112* **The language server doesn't start**: you see `Executable not found in $PATH` in the **Errors** tab of `/plugin`, or Claude never reports diagnostics for the language.
113113* **High memory use**: memory use increases while the server indexes the project.
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118118If your language isn't in the [table of official plugins](#install-a-code-intelligence-plugin), you can still connect a language server.
119119
1201201. Write a plugin with an `.lsp.json` file that names the server command and the file extensions it handles.
1212. Then load the plugin with [`--plugin-dir`](/docs/en/plugins/cli-reference#flags-that-load-a-plugin-for-one-session) or publish it to a marketplace.
1212. Then load the plugin with [`--plugin-dir`](https://code.claude.com/docs/en/plugins/cli-reference#flags-that-load-a-plugin-for-one-session) or publish it to a marketplace.
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123For the file's fields and a worked example, see [LSP servers in plugin components](/docs/en/plugins/components.md#lsp-servers).
123For the file's fields and a worked example, see [LSP servers in plugin components](https://code.claude.com/docs/en/plugins/components.md#lsp-servers).
124124
125125## Next steps
126126
127* [LSP servers in plugin components](/docs/en/plugins/components.md#lsp-servers): write the `.lsp.json` for a language server that has no official plugin
128* [Install and manage plugins](/docs/en/plugins/install.md): scopes, updates, and uninstalling
129* [Troubleshoot plugins](/docs/en/plugins/troubleshooting.md): load errors beyond the language-server ones on this page
130* [Find plugins in the official marketplace](/docs/en/plugins/anthropic-marketplaces.md#find-plugins-in-the-official-marketplace): where to browse the rest of the official marketplace
127* [LSP servers in plugin components](https://code.claude.com/docs/en/plugins/components.md#lsp-servers): write the `.lsp.json` for a language server that has no official plugin
128* [Install and manage plugins](https://code.claude.com/docs/en/plugins/install.md): scopes, updates, and uninstalling
129* [Troubleshoot plugins](https://code.claude.com/docs/en/plugins/troubleshooting.md): load errors beyond the language-server ones on this page
130* [Find plugins in the official marketplace](https://code.claude.com/docs/en/plugins/anthropic-marketplaces.md#find-plugins-in-the-official-marketplace): where to browse the rest of the official marketplace
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