Why

BigBlueButton 4.0 ships version 0.1.26 of the plugin SDK. The server compares that
version against the requiredSdkVersion declared in the plugin manifest and refuses to
load anything that does not match, so on a 4.0 server this plugin is rejected before its
bundle is ever fetched:

Cannot load plugin [DecreaseVolumeOnSpeak]: system SDK version [0.1.26] does not satisfy plugin requirement [~0.0.59].

This is the v0.1.x line, which is the one that targets the 0.1.x SDK, so this makes the plugin load and work on BigBlueButton 4.0.

What changed

• manifest.json: requiredSdkVersion from ~0.0.59 to ^0.1.2
• package.json and package-lock.json: bigbluebutton-html-plugin-sdk from 0.0.66 to 0.1.26

The plugin version itself was deliberately left alone. It is cut by the publish-tag workflow, which also updates package.json and package-lock.json, so it belongs to the release process rather than to this change.

How to test

1. Build and host the bundle:

   npm ci
   npm run build-bundle
   

   Serve manifest.json and dist/DecreaseVolumeOnSpeak.js from a URL the BigBlueButton server can reach. They have to sit next to each other, since javascriptEntrypointUrl is relative.
2. Attach the plugin to a single meeting, so no server side configuration is touched. In API-Mate, add this Create custom parameter:

   pluginManifests=[{"url":"https://<your-host>/<folder>/manifest.json"}]
   

3. Join the meeting as moderator. Join the meeting. This plugin has no UI surface, so the check is that the server accepts it and the client raises no error (see step 4).
4. Optionally confirm the server accepted the plugin, in the bbb_graphql database:

   SELECT name, "loadFailureReason" FROM plugin;

   loadFailureReason must be empty for this plugin.

Validation

Checked against a BigBlueButton 4.0 server built from source on v4.0.x-develop at commit 93bc4864ab, shipping plugin SDK 0.1.24, with the plugin attached per meeting:

• npx tsc and npm run lint both run clean locally, matching what the pull request workflows run
• the plugin loads with an empty loadFailureReason and the client reports no page error
• plugin accepted by the server and loaded with no client error

Re-verified after moving to SDK 0.1.26, on the pushed head: npm ci, npx tsc, npm run lint and npm run build-bundle all run clean, and the lock resolves the SDK to exactly 0.1.26.

Notes

• requiredSdkVersion is set to ^0.1.2, so any 0.1.x SDK from 0.1.2 up is accepted. The build pins 0.1.26, the SDK that 4.0 currently ships, while the wider floor also lets the plugin load on 4.0 servers that are still on an earlier 0.1.x SDK. Caret rather than tilde because on a 0.x floor the two operators accept exactly the same versions, and caret is the one that still expresses the intended range once the SDK reaches 1.0.0; note that ^0.1.2 by itself does not admit a 1.0.0 SDK.
• this plugin has no UI surface by design, so what is verified here is that the server accepts it and the bundle loads cleanly. There is no visible behaviour to demonstrate.

Co-authored with Guilherme Leme, who created the v0.1.x branches for these plugins.