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Sweep 22 Sep 2026 · 17:19Z Build v2.1.280 501 read Stable v2.1.267 Latest v2.1.280 Next v2.1.280 Feeds RSS JSON llms.txt Unofficial
Claude Code v2.1.261 ·

SDK plugin delivery via initialize request

SDK plugins can now be sent via an initialize request instead of the command line, with a fallback warning if not applied.

TierUse it nowhow much it should matter to you
Useful4my rating, 1 to 5
Signal2worth watching, 1 to 5
AreaSDKwhat it touches
KindNew Featuresin v2.1.261,
Use it now Notable No documentation found

SDK plugins can now be sent via an initialize request instead of the command line, with a fallback warning if not applied.

The SDK can now deliver plugins through the initialize control request by setting pluginDelivery: 'initialize', as an alternative to passing them via argv or --plugin-dir at launch. On the client side, Query.initialize() checks the server's plugins_applied response field, and if plugins sent this way were not applied, it logs a warning noting that the process runs with whatever it was launched with.

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Names in the bundlepluginDelivery: 'initialize'plugins_applied

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