Claude Code Adds ‘You Should Know’ to Flag Missed Details

The short version

• Claude Code v2.1.287 added the built-in You should know mod on October 1, 2026.
• A side agent can flag something you might miss during a longer task. Its note appears above the prompt.
• The plugin is disabled by default. Its release notes limit availability to first-party sessions with telemetry on.

Claude Code added You should know in v2.1.287, released October 1, 2026. In eligible sessions, the built-in plugin uses a side agent to flag things you or Claude might miss while Claude works. You can turn it on with /plugin enable cc-plugin-you-should-know@builtin.

What is You should know in Claude Code?

You should know is a built-in mod listed as cc-plugin-you-should-know in Claude Code’s plugin panel. A mod is a plugin that changes how Claude Code looks or behaves. This one runs a side agent alongside Claude’s work.

What does You should know do during longer tasks, and where do its notes appear?

During longer tasks, the side agent looks for something you might miss and displays a note above the prompt when it finds one.

The v2.1.288 release followed on October 2, 2026. Its You should know notes now use “we,” “the main agent,” or “you” to reflect who made a decision.

How to turn on You should know

Enter this command in a Claude Code session:

The plugin starts disabled; if it is available for your organization, you can find it in /plugin under Installed, then Show disabled.

You should know is available for first-party sessions with telemetry on. To turn it off, disable it in /plugin.

FAQs

Which Claude Code version added You should know, and when was it released?

Claude Code v2.1.287 added You should know. Its release page shows October 1, 2026.

Who can use You should know?

You should know is available for first-party sessions with telemetry on.

Is You should know on by default, and where can I find it?

No. It is disabled by default. If available for your organization, it appears in /plugin under Installed, then Show disabled.

How do I turn off You should know?

Disable it in /plugin.

What changed for You should know in Claude Code v2.1.288?

Claude Code v2.1.288, released October 2, 2026, changed the wording of You should know notes. They use “we,” “the main agent,” or “you” based on who made a decision.