Decompose architecture into 35 atomic tasks across 10 generations for implementation

tasks/transport/tcp-transport.md

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+---
+id: transport/tcp-transport
+name: Implement TcpTransport and TcpAcceptor
+status: pending
+depends_on:
+  - transport/trait-and-types
+scope: narrow
+risk: low
+impact: component
+level: implementation
+---
+
+## Description
+
+Implement the simplest transport: plain TCP. `TcpTransport` connects via `TcpStream::connect(addr)` on the client side. `TcpAcceptor` accepts via `TcpListener::accept()` on the server side. This is the baseline transport that all others build upon conceptually.
+
+## Acceptance Criteria
+
+- [ ] `crates/wraith-core/src/transport/tcp.rs` exports `TcpTransport` and `TcpAcceptor`
+- [ ] `TcpTransport` holds a `SocketAddr` target address
+- [ ] `TcpTransport::connect()` calls `TcpStream::connect(addr)` and returns the stream
+- [ ] `TcpTransport::describe()` returns e.g. `"tcp://1.2.3.4:22"`
+- [ ] `TcpAcceptor` holds a `TcpListener` and accept address
+- [ ] `TcpAcceptor::accept()` calls `listener.accept()`, returns `(stream, TransportInfo)` with `remote_addr` set and `TransportKind::Tcp`
+- [ ] `TcpAcceptor` constructor binds the listener: `TcpAcceptor::bind(addr)` async factory
+- [ ] Connection timeout handling (tokio default connect timeout is reasonable; document behavior)
+- [ ] Unit tests: connect creates a stream, accept receives a connection, describe format
+- [ ] Integration test: client connects to server via TCP, stream is duplex
+
+## References
+
+- docs/architecture/transport.md — TcpTransport row in implementations table
+- docs/architecture/overview.md — "TCP on port 22 for basic use"
+
+## Notes
+
+> To be filled by implementation agent
+
+## Summary
+
+> To be filled on completion