Extend Claude Code changedfeatures-overview
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2323* **[Dynamic workflows](/docs/en/workflows)** run many subagents from a script Claude writes, returning one result
2424* **[Cross-session messaging](/docs/en/cross-session-messaging)** lets Claude pass a message from one of your sessions to another
2525* **[Hooks](/docs/en/hooks-guide)** run your script, HTTP request, MCP tool call, prompt, or subagent when Claude Code reaches a lifecycle event
26* **[Plugins](/docs/en/plugins)** and **[marketplaces](/docs/en/plugin-marketplaces)** package and distribute these features
26* **[Plugins](/docs/en/plugins/overview)** and **[marketplaces](/docs/en/plugins/overview)** package and distribute these features
2727
2828[Skills](/docs/en/skills) are the most flexible extension. A skill is a markdown file containing knowledge, workflows, or instructions. You can invoke skills with a command like `/deploy`, or Claude can load them automatically when relevant. Skills can run in your current conversation or in an isolated context via subagents.
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4444| **Hook** | Script, HTTP request, MCP tool call, prompt, or subagent triggered by events | Automation that must run on every matching event | Run ESLint after every file edit |
4545| **[Artifact](/docs/en/artifacts)** | Publish session output as a private, interactive web page | Output you want to see or share visually rather than as terminal text | An incident timeline that updates as Claude investigates |
4646
47**[Plugins](/docs/en/plugins)** are the packaging layer. A plugin bundles skills, hooks, subagents, and MCP servers into a single installable unit. Plugin skills are namespaced (like `/my-plugin:review`) so multiple plugins can coexist. Use plugins when you want to reuse the same setup across multiple repositories or distribute to others via a **[marketplace](/docs/en/plugin-marketplaces)**.
47**[Plugins](/docs/en/plugins/overview)** are the packaging layer. A plugin bundles skills, hooks, subagents, and MCP servers into a single installable unit. Plugin skills are namespaced (like `/my-plugin:review`) so multiple plugins can coexist. Use plugins when you want to reuse the same setup across multiple repositories or distribute to others via a **[marketplace](/docs/en/plugins/overview)**.
4848
4949### Build your setup over time
5050
5151You don't need to configure everything up front. Each feature has a recognizable trigger, and most teams add them in roughly this order:
5252
53| Trigger | Add |
54| :------------------------------------------------------------------------------- | :--------------------------------------------------------------------------------------------- |
55| Claude gets a convention or command wrong twice | Add it to [CLAUDE.md](/docs/en/memory) |
56| You keep asking Claude to be shorter, explain more, or answer in the same format | Set an [output style](/docs/en/output-styles) |
57| You keep typing the same prompt to start a task | Save it as a user-invocable [skill](/docs/en/skills) |
58| You paste the same playbook or multi-step procedure into chat for the third time | Capture it as a [skill](/docs/en/skills) |
59| You keep copying data from a browser tab Claude can't see | Connect that system as an [MCP server](/docs/en/mcp) |
60| Claude reads many files to find where a symbol is defined or used | Install a [code intelligence plugin](/docs/en/discover-plugins#code-intelligence) for your language |
61| A side task floods your conversation with output you won't reference again | Route it through a [subagent](/docs/en/sub-agents) |
62| You want something to happen every time without asking | Write a [hook](/docs/en/hooks-guide) |
63| A second repository needs the same setup | Package it as a [plugin](/docs/en/plugins) |
53| Trigger | Add |
54| :------------------------------------------------------------------------------- | :------------------------------------------------------------------------------------ |
55| Claude gets a convention or command wrong twice | Add it to [CLAUDE.md](/docs/en/memory) |
56| You keep asking Claude to be shorter, explain more, or answer in the same format | Set an [output style](/docs/en/output-styles) |
57| You keep typing the same prompt to start a task | Save it as a user-invocable [skill](/docs/en/skills) |
58| You paste the same playbook or multi-step procedure into chat for the third time | Capture it as a [skill](/docs/en/skills) |
59| You keep copying data from a browser tab Claude can't see | Connect that system as an [MCP server](/docs/en/mcp) |
60| Claude reads many files to find where a symbol is defined or used | Install a [code intelligence plugin](/docs/en/plugins/code-intelligence) for your language |
61| A side task floods your conversation with output you won't reference again | Route it through a [subagent](/docs/en/sub-agents) |
62| You want something to happen every time without asking | Write a [hook](/docs/en/hooks-guide) |
63| A second repository needs the same setup | Package it as a [plugin](/docs/en/plugins/overview) |
6464
6565The same triggers tell you when to update what you already have. A repeated mistake or a recurring review comment is a CLAUDE.md edit, not a one-off correction in chat. A workflow you keep tweaking by hand is a skill that needs another revision.
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193193Features can be defined at multiple levels: user-wide, per-project, via plugins, or through managed policies. You can also nest CLAUDE.md files in subdirectories or place skills in specific packages of a monorepo. When the same feature exists at multiple levels, here's how they layer:
194194
195195* **CLAUDE.md files** are additive: all levels contribute content to Claude's context simultaneously. Files from your working directory and above load at launch; subdirectories load as you work in them. When instructions conflict, Claude uses judgment to reconcile them. See [how CLAUDE.md files load](/docs/en/memory#how-claude-md-files-load).
196* **Skills and subagents** override by name: when the same name exists at multiple levels, one definition wins based on priority (managed > user > project for skills; managed > CLI flag > project > user > plugin for subagents). Plugin skills are [namespaced](/docs/en/plugins#add-skills-to-your-plugin) to avoid conflicts. See [skill discovery](/docs/en/skills#resolve-skills-that-share-a-name) and [subagent scope](/docs/en/sub-agents#choose-the-subagent-scope).
196* **Skills and subagents** override by name: when the same name exists at multiple levels, one definition wins based on priority (managed > user > project for skills; managed > CLI flag > project > user > plugin for subagents). Plugin skills are [namespaced](/docs/en/plugins/components#skills) to avoid conflicts. See [skill discovery](/docs/en/skills#resolve-skills-that-share-a-name) and [subagent scope](/docs/en/sub-agents#choose-the-subagent-scope).
197197* **MCP servers** override by name: local > project > user. See [MCP scope](/docs/en/mcp#scope-hierarchy-and-precedence).
198198* **Hooks** merge: all registered hooks fire for their matching events regardless of source. See [hooks](/docs/en/hooks).
199199
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282282
283283 **Context cost:** Low. Symbol lookups often replace broad file reads, so net context use can go down.
284284
285 <Tip>The LSP tool is inactive until you install a [code intelligence plugin](/docs/en/discover-plugins#code-intelligence) for your language.</Tip>
285 <Tip>The LSP tool is inactive until you install a [code intelligence plugin](/docs/en/plugins/code-intelligence) for your language.</Tip>
286286 </Tab>
287287
288288 <Tab title="Subagents">
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346346 Automate actions with hooks
347347 </Card>
348348
349 <Card title="Plugins" icon="puzzle-piece" href="/docs/en/plugins">
349 <Card title="Plugins" icon="puzzle-piece" href="/docs/en/plugins/overview">
350350 Bundle and share feature sets
351351 </Card>
352352
353 <Card title="Marketplaces" icon="store" href="/docs/en/plugin-marketplaces">
353 <Card title="Marketplaces" icon="store" href="/docs/en/plugins/create-marketplace">
354354 Host and distribute plugin collections
355355 </Card>
356356</CardGroup>
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