Telegram and desktop can attach to the same session while a turn is streaming. The WebSocket handler now tracks output callbacks per client and broadcasts session messages instead of replacing the previous subscriber. Telegram thinking deltas are accumulated before editing the placeholder so the preview does not collapse to the latest tiny chunk.
Constraint: Desktop and IM adapters may observe the same active session concurrently
Rejected: Keep a single session output callback | a later desktop view can steal Telegram's live content and completion events
Confidence: high
Scope-risk: moderate
Directive: Do not collapse session output callbacks back to one callback without a multi-client streaming regression
Tested: bun run check:server (828 pass); bun run check:adapters (358 pass); git diff --check
Not-tested: Live Telegram Bot API smoke against the packaged app
Telegram Bot API text edits share the same practical message length ceiling as sends, so streaming one growing placeholder can stop exposing new assistant output once the text approaches the limit. The adapter now seals full chunks, opens a fresh editable placeholder, and routes Telegram outbound text through a table-to-bullet formatter for phone readability.
Constraint: Telegram text messages and edits must stay below the platform message limit.
Rejected: Wait until message_complete to split the answer | users still lose streaming visibility during long replies.
Confidence: high
Scope-risk: narrow
Directive: Keep Telegram-specific streaming state in adapters/telegram/format.ts instead of spreading chunk math across message handlers.
Tested: bun test adapters/telegram/__tests__/telegram.test.ts adapters/common/__tests__/format.test.ts
Tested: cd adapters && bunx tsc --noEmit
Tested: bun run check:adapters
Tested: cd desktop && bun run build:sidecars
Not-tested: Live Telegram Bot API run with a real bot token.
