diff --git a/.gitignore b/.gitignore
index bbbc34e..f1ce0e6 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,5 @@ build/
 ide/*.componentinfo.xml
 ide/Debug/
 ide/Release/
+ide/.vs/
+ide/*.log
diff --git a/README.md b/README.md
index fb36b4d..5b6cc76 100644
--- a/README.md
+++ b/README.md
@@ -23,18 +23,28 @@ cmake --build --preset atmega328p-generated
 
 `master` carries a Studio solution, so this branch does too: `ide/fantemp.atsln`
 builds the same firmware — byte-identical `.text` and `.data` to the CMake
-build — from the same sources, with the flags mirrored by hand. Studio finds
-libavr through `$(LIBAVR_ROOT)`, the same environment variable the CMake build
-uses, and needs a GCC 16.1 toolchain registered as flavour `avr-g++-16.1.0`;
+build — from the same sources, with the flags mirrored by hand.
+
+Studio expects libavr checked out **beside this repo**, and finds it at
+`$(MSBuildProjectDirectory)\..\..\libavr\include` — anchored to the project
+rather than written relative to the generated makefile, which runs from the
+configuration's output directory and would need a different number of `..`.
+Unlike the CMake build there is no `LIBAVR_ROOT` to point elsewhere: an
+environment variable set in a shell is not visible to Studio launched from the
+Start menu, which fails as a missing `libavr/libavr.hpp` rather than as anything
+about the variable. Pinning libavr as a submodule is the better answer and is on
+libavr's task list.
+
+It also needs a GCC 16.1 toolchain registered as flavour `avr-g++-16.1.0`;
 nothing older can compile `-std=c++26`.
 
 One generated file is required before the project will load, and one command
 checks the flags have not drifted (both from libavr's `tools/atmelstudio/`):
 
 ```sh
-python $LIBAVR_ROOT/tools/atmelstudio/componentinfo.py \
+python ../libavr/tools/atmelstudio/componentinfo.py \
     ide/fantemp.componentinfo.xml --device ATmega328P
-python $LIBAVR_ROOT/tools/atmelstudio/check-flags.py --solution ide/fantemp.atsln \
+python ../libavr/tools/atmelstudio/check-flags.py --solution ide/fantemp.atsln \
     --compile-commands build/atmega328p-generated/compile_commands.json \
     --log build/atmelstudio.log
 ```
diff --git a/ide/fantemp.cppproj b/ide/fantemp.cppproj
index 3c44948..2119627 100644
--- a/ide/fantemp.cppproj
+++ b/ide/fantemp.cppproj
@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="14.0">
   <PropertyGroup>
     <SchemaVersion>2.0</SchemaVersion>
@@ -28,6 +28,18 @@
     <ResetRule>0</ResetRule>
     <eraseonlaunchrule>0</eraseonlaunchrule>
     <EraseKey />
+    <AsfFrameworkConfig>
+      <framework-data xmlns="">
+  <options />
+  <configurations />
+  <files />
+  <documentation help="" />
+  <offline-documentation help="" />
+  <dependencies>
+    <content-extension eid="atmel.asf" uuidref="Atmel.ASF" version="3.52.0" />
+  </dependencies>
+</framework-data>
+    </AsfFrameworkConfig>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
     <ToolchainSettings>
@@ -45,7 +57,7 @@
         </avrgcccpp.compiler.symbols.DefSymbols>
         <avrgcccpp.compiler.directories.IncludePaths>
           <ListValues>
-            <Value>$(LIBAVR_ROOT)\include</Value>
+            <Value>$(MSBuildProjectDirectory)\..\..\libavr\include</Value>
           </ListValues>
         </avrgcccpp.compiler.directories.IncludePaths>
         <avrgcccpp.compiler.optimization.level>Optimize for size (-Os)</avrgcccpp.compiler.optimization.level>
@@ -74,7 +86,7 @@
         </avrgcccpp.compiler.symbols.DefSymbols>
         <avrgcccpp.compiler.directories.IncludePaths>
           <ListValues>
-            <Value>$(LIBAVR_ROOT)\include</Value>
+            <Value>$(MSBuildProjectDirectory)\..\..\libavr\include</Value>
           </ListValues>
         </avrgcccpp.compiler.directories.IncludePaths>
         <avrgcccpp.compiler.optimization.level>Optimize debugging experience (-Og)</avrgcccpp.compiler.optimization.level>
@@ -88,9 +100,41 @@
     </ToolchainSettings>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="..\src\board.hpp">
+      <SubType>compile</SubType>
+      <Link>src\board.hpp</Link>
+    </Compile>
+    <Compile Include="..\src\bootloader.hpp">
+      <SubType>compile</SubType>
+      <Link>src\bootloader.hpp</Link>
+    </Compile>
+    <Compile Include="..\src\controller.hpp">
+      <SubType>compile</SubType>
+      <Link>src\controller.hpp</Link>
+    </Compile>
+    <Compile Include="..\src\curve.hpp">
+      <SubType>compile</SubType>
+      <Link>src\curve.hpp</Link>
+    </Compile>
     <Compile Include="..\src\main.cpp">
       <SubType>compile</SubType>
+      <Link>src\main.cpp</Link>
+    </Compile>
+    <Compile Include="..\src\statistics.hpp">
+      <SubType>compile</SubType>
+      <Link>src\statistics.hpp</Link>
+    </Compile>
+    <Compile Include="..\src\terminal.hpp">
+      <SubType>compile</SubType>
+      <Link>src\terminal.hpp</Link>
+    </Compile>
+    <Compile Include="..\src\thermistor.hpp">
+      <SubType>compile</SubType>
+      <Link>src\thermistor.hpp</Link>
     </Compile>
   </ItemGroup>
+  <ItemGroup>
+    <Folder Include="src" />
+  </ItemGroup>
   <Import Project="$(AVRSTUDIO_EXE_PATH)\Vs\Compiler.targets" />
-</Project>
+</Project>
\ No newline at end of file