docs: define streaming mcp architecture

TASKS.md

@@ -2,23 +2,31 @@
 
 ## Current
 
-### `feat/secret-store-foundation`
+### `feat/streaming-mcp-architecture`
 
 Status: completed
 
 DoD:
-- Workspace-scoped secret store is persisted in PostgreSQL
-- Secret values are encrypted with `CRANK_MASTER_KEY`
-- Admin API exposes create/list/get/rotate/delete secret endpoints
-- Integration tests cover secret CRUD and rotation
+- Official MCP transport semantics are reflected in docs
+- Streaming modes and protocol support matrix are documented
+- Core docs and `TASKS.md` are synchronized around controlled streaming model
 
 ## Next
 
-- `feat/auth-profile-secret-resolution`
+- `feat/mcp-streamable-http-alignment`
 
 ## Backlog
 
-- `feat/secret-store-foundation`
+- `feat/streaming-mcp-architecture`
+- `feat/mcp-streamable-http-alignment`
+- `feat/streaming-core-model`
+- `feat/stream-session-store`
+- `feat/runtime-window-mode`
+- `feat/rest-sse-adapter`
+- `feat/grpc-server-streaming-adapter`
+- `feat/session-and-job-tools`
+- `feat/streaming-ui-config`
+- `feat/streaming-e2e`
 - `feat/auth-profile-secret-resolution`
 - `feat/runtime-upstream-auth`
 - `feat/secrets-ui`