diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..4f4927c
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,10 @@
+cmake_minimum_required(VERSION 3.16)
+project(MetalKompanion LANGUAGES CXX)
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+find_package(Qt6 REQUIRED COMPONENTS Core Network DBus)
+add_executable(kompanion_server
+  src/main.cpp
+)
+target_link_libraries(kompanion_server Qt6::Core Qt6::Network Qt6::DBus)
+install(TARGETS kompanion_server RUNTIME DESTINATION bin)
diff --git a/docs/SHARED-INFRA.md b/docs/SHARED-INFRA.md
new file mode 100644
index 0000000..f75e75e
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+++ b/docs/SHARED-INFRA.md
@@ -0,0 +1,11 @@
+# Shared Infrastructure (Kompanion)
+
+- XDG paths: state/config/cache under `~/.local/state/kompanion`, `~/.config/kompanion`, `~/.cache/kompanion`.
+- Identity: `identity.json` (DID, anchors, aspects).
+- Tools: JSON-RPC `tools/list`, `tools/call`; SSE `/events`.
+- Baseline tools: `journal.append`, `ledger.append`, `tmux.list/peek`, `ripgrep.search`.
+- Persona Library: `profiles/*.md` (explicit, logged adoption).
+- Model map: `models.yaml` (local first: Ollama).
+- Policy: `capabilities.json` (Maker/Librarian/Companion), two-person rule for remote writes.
+- Networking: TOR proxy by default via `ALL_PROXY=socks5h://tor:9050`; Ollama kept local.
+