Add Meta-Effect mechanism to intercept Effects (similar to Meta-Reducers)

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Which @ngrx/* package(s) are relevant/related to the feature request?

effects

Information

Currently, NgRx provides Meta-Reducers that allow developers to wrap, intercept, or enhance reducer logic globally.
However, there is no equivalent mechanism for Effects.

I am building a developer tool (similar to Redux DevTools) and wanted to track, intercept Effects in a centralized way.

Describe any alternatives/workarounds you're currently using

Without a "Meta-Effect" layer, the only option is to manually wrap each effect or create a custom operator, which is not scalable for large projects or external tooling.

I would be willing to submit a PR to fix this issue

• Yes
• No

[markostanimirovic]

Can you provide an example of what you're trying to achieve/a use case where "meta-effect" would be useful?

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Like i said in my previous message currently, NgRx devtools let you see actions and state (using the meta-reducer for intercepting actions), but the “effect layer” is invisible (This is strange, because in real-world apps, this is where many of the tricky bugs actually live 😭).

For debugging complex flows (e.g., orchestrating multiple API calls, retries, error handling), it’s very useful to know:

• Which action triggered which effect.

• What action(s) that effect dispatched in response.

• How effects chain together over time.

A meta-effect API would let us Intercept effects globally.

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Should I work on this?

[markostanimirovic]

You can provide a proposal. We will review it and let you know if it's a good candidate to become part of the core package.

To proceed with this feature request, the full prototype is not required, but at least a proposal (code snippets) of how the usage of "meta-effect" would look is necessary.

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This is my proposal for introducing meta-effects in NgRx :

ngrx-meta-effects-proposal.md