angular.courses
DIOP0103EnvironmentCI gate

RxJS outside the supported range

The installed RxJS version is not supported by the installed Angular version.

What it means

Angular's peer range for RxJS is enforced at install time by npm, but pnpm, overrides and stale lockfiles can leave an unsupported version in place.

How to fix it

Install an RxJS version inside the range shown.

What it looks like

As printed by diopter check; the UI and the Markdown report show the same finding with its location.

[DIOP0103] RxJS 6.6.7 is outside the range supported by Angular 21.2.12 (^6.5.3 || ^7.4.0).
In CI
Fails diopter check unless --fail-on none.
In the UI
The Environment tab, from diopter next to your dev server, or the static report from diopter build.
For agents
MCP tool get-report (diopter mcp).

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