feat(sdk): AI SDK custom useChat transport & chat.task harness #5338

Job	Run time
sdk-compat / Cloudflare Workers	2m 14s
e2e / 🧪 CLI v3 tests (ubuntu-latest - npm)	1m 48s
e2e / 🧪 CLI v3 tests (windows-latest - pnpm)	3m 48s
typecheck / typecheck	7m 0s
sdk-compat / Node.js 20.20 (ubuntu-latest)	2m 6s
sdk-compat / Deno Runtime	2m 5s
e2e / 🧪 CLI v3 tests (windows-latest - npm)	5m 15s
e2e / 🧪 CLI v3 tests (ubuntu-latest - pnpm)	1m 55s
sdk-compat / Bun Runtime	2m 6s
units / packages / 🧪 Unit Tests: Packages (1, 1)	9m 6s
sdk-compat / Node.js 22.12 (ubuntu-latest)	2m 11s
units / internal / 🧪 Unit Tests: Internal (6, 8)	4m 30s
units / internal / 🧪 Unit Tests: Internal (2, 8)	4m 28s
units / internal / 🧪 Unit Tests: Internal (4, 8)	4m 27s
units / internal / 🧪 Unit Tests: Internal (7, 8)	4m 27s
units / internal / 🧪 Unit Tests: Internal (8, 8)	2m 53s
units / webapp / 🧪 Unit Tests: Webapp (3, 8)	3m 24s
units / webapp / 🧪 Unit Tests: Webapp (8, 8)	2m 50s
units / webapp / 🧪 Unit Tests: Webapp (6, 8)	8m 10s
units / webapp / 🧪 Unit Tests: Webapp (2, 8)	4m 22s
units / webapp / 🧪 Unit Tests: Webapp (5, 8)	4m 49s
units / internal / 🧪 Unit Tests: Internal (5, 8)	4m 26s
units / webapp / 🧪 Unit Tests: Webapp (4, 8)	6m 2s
units / internal / 🧪 Unit Tests: Internal (3, 8)	4m 11s
units / internal / 🧪 Unit Tests: Internal (1, 8)	3m 56s
units / webapp / 🧪 Unit Tests: Webapp (1, 8)	5m 58s
units / webapp / 🧪 Unit Tests: Webapp (7, 8)	5m 50s
units / internal / 📊 Merge Reports	27s
units / webapp / 📊 Merge Reports	49s
units / packages / 📊 Merge Reports	28s
	1h 56m 1s

Provide feedback