Auto-send buffered stream output in group scope conversations

[Copilot]

Streaming currently requires app authors to branch on activity.conversation.isGroup and switch from stream.emit(...) to send(...) manually. This change moves that behavior into the framework: in group scope, streamed chunks are buffered and emitted as one final message.

• Behavior change in HttpStream for group scope

  • Detects group conversations from ConversationReference (conversation.isGroup).
  • Suppresses intermediate streaming activity sends in group scope (no typing/stream update chunk creates).
  • On close(), sends a single normal message activity with the accumulated text/attachments/entities.
  • Removes channelData.streamType from the final group-scope send so it is not treated as a stream-final payload.

• Non-group streaming behavior remains unchanged

  • Existing chunk/update + stream-final close flow is preserved for non-group conversations.
  • Added defensive close-path guard to avoid emitting stream-final without a stream id in non-group scope.

• Focused coverage for new behavior

  • Added HttpStream spec validating that group-scope streaming:
    • buffers during emit/update,
    • performs no intermediate creates,
    • sends one final normal message on close.

// Before (app code had to branch)
if (activity.conversation.isGroup) {
  await send(new MessageActivity(response.content));
} else {
  await prompt.send(query, { onChunk: (chunk) => stream.emit(chunk) });
}

// After
await prompt.send(query, { onChunk: (chunk) => stream.emit(chunk) });
// group-scope now auto-buffers and sends on stream.close()

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• incoming-service.botframework.com
  • Triggering command: /usr/local/bin/node /usr/local/bin/node /home/REDACTED/work/teams.ts/teams.ts/node_modules/jest-worker/build/workers/processChild.js /sh sh tool�� tsup (dns block)
  • Triggering command: /usr/local/bin/node /usr/local/bin/node /home/REDACTED/work/teams.ts/teams.ts/node_modules/jest-worker/build/workers/processChild.js modules/.bin/sh node .ts/�� ./dist/index.d.mts git s/node_modules/.bin/node get --local .ts/packages/apps/node_modules/.git status --porcelain --ignore-submodules | head -n 10 sh /.bi�� tsup git .ts/packages/node_modules/.bin/sh ec.ts src/app.prsh credential.helpe-c p/bin/bash sh (dns block)
  • Triggering command: /usr/local/bin/node /usr/local/bin/node /home/REDACTED/work/teams.ts/teams.ts/node_modules/jest-worker/build/workers/processChild.js k/teams.ts/teamsjest sh -c tsup git e_modules/.bin/node HEAD (dns block)
• service-1.botframework.com
  • Triggering command: /usr/local/bin/node /usr/local/bin/node /home/REDACTED/work/teams.ts/teams.ts/node_modules/jest-worker/build/workers/processChild.js /sh sh tool�� tsup (dns block)
  • Triggering command: /usr/local/bin/node /usr/local/bin/node /home/REDACTED/work/teams.ts/teams.ts/node_modules/jest-worker/build/workers/processChild.js modules/.bin/sh node .ts/�� ./dist/index.d.mts git s/node_modules/.bin/node get --local .ts/packages/apps/node_modules/.git status --porcelain --ignore-submodules | head -n 10 sh /.bi�� tsup git .ts/packages/node_modules/.bin/sh ec.ts src/app.prsh credential.helpe-c p/bin/bash sh (dns block)
  • Triggering command: /usr/local/bin/node /usr/local/bin/node /home/REDACTED/work/teams.ts/teams.ts/node_modules/jest-worker/build/workers/processChild.js k/teams.ts/teamsjest sh -c tsup git e_modules/.bin/node HEAD (dns block)
• service-2.botframework.com
  • Triggering command: /usr/local/bin/node /usr/local/bin/node /home/REDACTED/work/teams.ts/teams.ts/node_modules/jest-worker/build/workers/processChild.js /sh sh tool�� tsup (dns block)
  • Triggering command: /usr/local/bin/node /usr/local/bin/node /home/REDACTED/work/teams.ts/teams.ts/node_modules/jest-worker/build/workers/processChild.js modules/.bin/sh node .ts/�� ./dist/index.d.mts git s/node_modules/.bin/node get --local .ts/packages/apps/node_modules/.git status --porcelain --ignore-submodules | head -n 10 sh /.bi�� tsup git .ts/packages/node_modules/.bin/sh ec.ts src/app.prsh credential.helpe-c p/bin/bash sh (dns block)
  • Triggering command: /usr/local/bin/node /usr/local/bin/node /home/REDACTED/work/teams.ts/teams.ts/node_modules/jest-worker/build/workers/processChild.js k/teams.ts/teamsjest sh -c tsup git e_modules/.bin/node HEAD (dns block)
• token.botframework.com
  • Triggering command: /usr/local/bin/node /usr/local/bin/node /home/REDACTED/work/teams.ts/teams.ts/node_modules/jest-worker/build/workers/processChild.js /sh sh tool�� tsup (dns block)
  • Triggering command: /usr/local/bin/node /usr/local/bin/node /home/REDACTED/work/teams.ts/teams.ts/node_modules/jest-worker/build/workers/processChild.js modules/.bin/sh node .ts/�� ./dist/index.d.mts git s/node_modules/.bin/node get --local .ts/packages/apps/node_modules/.git status --porcelain --ignore-submodules | head -n 10 sh /.bi�� tsup git .ts/packages/node_modules/.bin/sh ec.ts src/app.prsh credential.helpe-c p/bin/bash sh (dns block)
  • Triggering command: /usr/local/bin/node /usr/local/bin/node /home/REDACTED/work/teams.ts/teams.ts/node_modules/jest-worker/build/workers/processChild.js k/teams.ts/teamsjest sh -c tsup git e_modules/.bin/node HEAD (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)