Explanatory Output Style
Adds educational insights about implementation choices and codebase patterns (mimics the deprecated Explanatory output style)
- Type
- Plugin
- Repository
- anthropics/claude-plugins-official
- GitHub stars
- 37.1k
- License
- Apache-2.0
- Repo last updated
- Sep 25, 2026
- Version
- 1.0.0
- Author
- Anthropic
What Explanatory Output Style is
Explanatory Output Style is a plugin published in the anthropics/claude-plugins-official repository on GitHub, which has about 37.1k stars. The repository describes itself as: “Official, Anthropic-managed directory of high quality Claude Code Plugins.”
A plugin is a package that bundles skills, slash commands, subagents, hooks, and MCP connectors so they install together. Plugins are plain files with a manifest at .claude-plugin/plugin.json, and they work in both Claude Code and Claude Cowork.
Installing Explanatory Output Style adds everything it ships in one step. Connectors inside a plugin still need to be connected separately, and hooks and subagents only run in Cowork and Claude Code, not in regular chat.
How to install Explanatory Output Style
Claude Code
- Add the repository as a plugin marketplace: claude plugin marketplace add anthropics/claude-plugins-official
- Install the plugin: claude plugin install explanatory-output-style@<marketplace-name>, using the marketplace name from the repository's .claude-plugin/marketplace.json.
- Restart the session if the new skills or commands don't appear straight away.
Claude Cowork
- Open Customize → Plugins and choose Add marketplace.
- Enter anthropics/claude-plugins-official (the owner/repo shorthand works for GitHub).
- Find Explanatory Output Style in the list, click Install, then connect any connectors it needs from its Connectors tab.
New to extending Cowork? Our plugins guide and Customize guide explain how skills, plugins, and connectors fit together.
Inside the source file
An excerpt from plugins/explanatory-output-style/.claude-plugin/plugin.json, shared under the repository's Apache-2.0 license. Read the full file on GitHub.
This plugin recreates the deprecated Explanatory output style as a SessionStart hook.
WARNING: Do not install this plugin unless you are fine with incurring the token cost of this plugin's additional instructions and output.
What it does
When enabled, this plugin automatically adds instructions at the start of each session that encourage Claude to:
- Provide educational insights about implementation choices
- Explain codebase patterns and decisions
- Balance task completion with learning opportunities
How it works
The plugin uses a SessionStart hook to inject additional context into every session. This context instructs Claude to provide brief educational explanations before and after writing code, formatted as:
`★ Insight ─────────────────────────────────────`
[2-3 key educational points]
`─────────────────────────────────────────────────`Usage
Once installed, the plugin activates automatically at the start of every session. No additional configuration is needed.
The insights focus on:
- Specific implementation choices for your codebase
- Patterns and conventions in your code
- Trade-offs and design decisions
- Codebase-specific details rather than general programming concepts
Migration from Output Styles
This plugin replaces the deprecated "Explanatory" output style setting. If you previously used:
{
"outputStyle": "Explanatory"
}You can now achieve the same behavior by installing this plugin instead.
More generally, this SessionStart hook pattern is roughly equivalent to CLAUDE.md, but it is more flexible and allows for distribution through plugins.
Note: Output styles that involve tasks besides software development, are better expressed as subagents, not as SessionStart hooks. Subagents change the system prompt while SessionStart hooks add to the default system prompt.
Managing changes
- Disable the plugin - keep the code installed on your device
- Uninstall the plugin - remove the code from your device
- Update the plugin - create a local copy of this plugin to personalize this plugin
- Hint: Ask Claude to read https://docs.claude.com/en/docs/claude-code/plugins.md and set it up for you!
Before you install
- Read the whole file first. Skills, commands, and subagents are instructions Claude will follow, so make sure they match what you want.
- Check which tools, scripts, or MCP servers it uses. Local servers and scripts run with your permissions.
- Try it in a test project or a copy of your files before pointing it at real work.
- Pin the version you tested, and review changes before updating.
- Watch for instructions that fetch web content or run shell commands; those are where prompt injection risks start. See our prompt injection guide.
FAQ
What is Explanatory Output Style?
Explanatory Output Style is a plugin for Claude Code and Claude Cowork from the anthropics/claude-plugins-official repository on GitHub. Adds educational insights about implementation choices and codebase patterns (mimics the deprecated Explanatory output style)
How do I install Explanatory Output Style in Claude Code?
Add the repository as a plugin marketplace: claude plugin marketplace add anthropics/claude-plugins-official Install the plugin: claude plugin install explanatory-output-style@<marketplace-name>, using the marketplace name from the repository's .claude-plugin/marketplace.json. Restart the session if the new skills or commands don't appear straight away.
Can I use Explanatory Output Style in Claude Cowork?
Open Customize → Plugins and choose Add marketplace. Enter anthropics/claude-plugins-official (the owner/repo shorthand works for GitHub). Find Explanatory Output Style in the list, click Install, then connect any connectors it needs from its Connectors tab.
Is Explanatory Output Style safe to install?
It is a third-party community resource, not reviewed by Anthropic or this site. Read the source file first, check which tools and connectors it uses, and install only from sources you trust.
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