Document v2 multi-node architecture in CLAUDE.md

Add v2 Development section covering multi-node fleet design (master,
agent self-registration, tier-based placement, edge routing). Update
project structure to reflect new agent subsystems (edge_rpc, dns,
proxy, certs).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -12,6 +12,21 @@ MCP has two components:
 
 Services have one or more components (containers). Container naming: `<service>-<component>`.
 
+## v2 Development (Multi-Node)
+
+MCP v2 extends the single-node agent model to a multi-node fleet with a central master process. See the root repo's `docs/phase-e-plan.md` and `docs/architecture-v2.md` for the full design.
+
+**Current state:**
+- **svc** is operational as an edge node (manages mc-proxy routing only, no containers)
+- **rift** runs the agent with full container management
+- **orion** is provisioned but offline for maintenance
+
+**Key v2 concepts (in development):**
+- **mcp-master** — central orchestrator on rift. Accepts CLI commands, dispatches to agents, maintains node registry, coordinates edge routing.
+- **Agent self-registration** — agents register with the master on startup (name, role, address, arch). No static node config required after bootstrap.
+- **Tier-based placement** — `tier = "core"` runs on the master node, `tier = "worker"` (default) is auto-placed on a worker with capacity, `node = "<name>"` overrides for pinned services.
+- **Edge routing** — `public = true` on routes declares intent; the master assigns the route to an edge node (currently svc).
+
 ## Build Commands
 
 ```bash
@@ -33,7 +48,7 @@ Run a single test: `go test ./internal/registry/ -run TestComponentCRUD`
 
 - `cmd/mcp/` — CLI entry point
 - `cmd/mcp-agent/` — Agent entry point
-- `internal/agent/` — Agent core (deploy, lifecycle, sync, adopt, status, files)
+- `internal/agent/` — Agent core (deploy, lifecycle, sync, adopt, status, files, edge_rpc, dns, proxy, certs)
 - `internal/runtime/` — Container runtime abstraction (podman)
 - `internal/registry/` — SQLite registry (services, components, events)
 - `internal/monitor/` — Monitoring subsystem (watch loop, alerting)