Page history · claude-docs

Supersede older widget instancesconnectors/building/mcp-apps/instance-supersession

Every read this site has made of the page, newest first. A date is when upstream edited the page, where upstream publishes that, and otherwise when the poller caught the edit; each row says which of the two it is.

Recorded changes2including the first read

Lines now244in the newest capture

Characters15,058in the newest capture

First seen 14 Aug 2026 09:20 UTC

Last changed 25 Sep 2026 18:07 UTC

Every recorded edit

2 edits since this site first read it

WhenTitle it carriedWhatLines

25 Sep 26 Supersede older widget instances ±changed +49−46 14 Aug 26 Supersede older widget instances ·first recorded +241−0

As it stands

Lines244
Characters15,058
Categoryconnectors
Pathconnectors/building/mcp-apps/instance-supersession

Read it upstream →

Sections it gained

## Understand how supersession works
### Understand why the key comes from the server
## Handle production edge cases
### Don't compare server and client timestamps
### Cache the key across remounts
## Next steps
# Supersede older widget instances
## How it works
## Mint the election key on the server
### Why not use client-side `Date.now()`?
## Run the election in the widget
### Read the key from the `toolresult` event