Upgrade Redux ecosystem to v5

[GaryJones]

Summary

The Redux ecosystem in this project needs upgrading, but is currently blocked by redux-observable not having a stable release compatible with Redux 5.

Current State

Package	Current Version	Latest Compatible with Redux 5
redux	^4.2.1	^5.0.1
react-redux	^8.1.0	^9.2.0
redux-devtools-extension	^2.13.2	@redux-devtools/extension@^3.3.0
redux-observable	^2.0.0	^3.0.0-rc.3 (RC only)

Blocker

redux-observable is the critical blocker:

• v2.0.0 (current, released Jun 2021) requires redux >=4 <5
• v3.0.0-rc.3 (released Dec 9, 2025) requires redux >=5 <6
• No stable v3 release exists yet

Dependencies

This upgrade requires all packages to be updated together due to peer dependency requirements:

• react-redux@9.x requires redux@^5.0.0
• redux-observable@3.x requires redux@>=5 <6
• redux-devtools-extension is deprecated; must migrate to @redux-devtools/extension

Code Changes Required

When ready to proceed:

1. Update package.json:

   "redux": "^5.0.1",
   "react-redux": "^9.2.0",
   "@redux-devtools/extension": "^3.3.0",
   "redux-observable": "^3.0.0"

   Remove: redux-devtools-extension

2. Update store configuration (src/react/store/index.js):

   // Change import from:
   import { composeWithDevTools } from 'redux-devtools-extension';
   // To:
   import { composeWithDevTools } from '@redux-devtools/extension';

3. No other code changes expected — createStore, combineReducers, connect, and epics APIs remain compatible.

Action Items

• Monitor redux-observable for stable v3.0.0 release
• Once stable, create PR to upgrade entire Redux ecosystem together

Related

• Closed PR npm(deps): bump react-redux from 8.1.3 to 9.2.0 #744 (Dependabot attempted react-redux upgrade alone)