diff --git a/.editorconfig b/.editorconfig
index 56e85e0..93cf8d1 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -174,6 +174,10 @@ csharp_wrap_before_ternary_opsigns = true
 
 #### Naming Conventions ####
 
+# The per-rule severities below drive the IDE only. Build enforcement of naming
+# (EnforceCodeStyleInBuild) reads the IDE1006 diagnostic severity.
+dotnet_diagnostic.IDE1006.severity = warning
+
 # Naming rules
 dotnet_naming_rule.interface_should_be_begins_with_i.severity = warning
 dotnet_naming_rule.interface_should_be_begins_with_i.symbols = interface
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 5965fd3..d3c6aea 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,14 +5,18 @@ on:
     branches: [master, main]
     paths:
       - ".github/workflows/ci.yml"
+      - ".editorconfig"
       - "SemiStep/**"
+      - "SemiStep.slnx"
       - "ConfigFiles/**"
       - "global.json"
       - "!**.md"
   pull_request:
     paths:
       - ".github/workflows/ci.yml"
+      - ".editorconfig"
       - "SemiStep/**"
+      - "SemiStep.slnx"
       - "ConfigFiles/**"
       - "global.json"
       - "!**.md"
diff --git a/.run/Debug MBE.run.xml b/.run/Debug MBE.run.xml
index ed0f4be..06ef6d9 100644
--- a/.run/Debug MBE.run.xml	
+++ b/.run/Debug MBE.run.xml	
@@ -1,7 +1,7 @@
-<component name="ProjectRunConfigurationManager">
+<component name="ProjectRunConfigurationManager">
   <configuration default="false" name="Debug MBE" type="DotNetProject" factoryName=".NET Project">
     <log_file alias="semistep.log" path="$USER_HOME$/AppData/Local/Temp/Semistep/semistep.log" checked="true" skipped_content="true" />
-    <option name="EXE_PATH" value="$PROJECT_DIR$/SemiStep/Artifacts/bin/SemiStep.UI/debug/SemiStep.UI.exe" />
+    <option name="EXE_PATH" value="$PROJECT_DIR$/SemiStep/Artifacts/bin/SemiStep.UI/debug/SemiStep.exe" />
     <option name="PROGRAM_PARAMETERS" value="--config-dir &quot;$PROJECT_DIR$/ConfigFiles/MBE&quot; --log-file &quot;$USER_HOME$/AppData/Local/Temp/Semistep/semistep.log&quot; --logging-level verbose" />
     <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/SemiStep/Artifacts/bin/SemiStep.UI/debug" />
     <option name="PASS_PARENT_ENVS" value="1" />
diff --git a/.run/Debug MOCVD.run.xml b/.run/Debug MOCVD.run.xml
index 693ff63..3171da2 100644
--- a/.run/Debug MOCVD.run.xml	
+++ b/.run/Debug MOCVD.run.xml	
@@ -1,7 +1,7 @@
-<component name="ProjectRunConfigurationManager">
+<component name="ProjectRunConfigurationManager">
   <configuration default="false" name="Debug MOCVD" type="DotNetProject" factoryName=".NET Project">
     <log_file alias="semistep.log" path="$USER_HOME$/AppData/Local/Temp/Semistep/semistep.log" />
-    <option name="EXE_PATH" value="$PROJECT_DIR$/SemiStep/Artifacts/bin/SemiStep.UI/debug/SemiStep.UI.exe" />
+    <option name="EXE_PATH" value="$PROJECT_DIR$/SemiStep/Artifacts/bin/SemiStep.UI/debug/SemiStep.exe" />
     <option name="PROGRAM_PARAMETERS" value="--config-dir &quot;$PROJECT_DIR$/ConfigFiles/MOCVD&quot; --log-file &quot;$USER_HOME$/AppData/Local/Temp/Semistep/semistep.log&quot; --logging-level verbose" />
     <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/SemiStep/Artifacts/bin/SemiStep.UI/debug" />
     <option name="PASS_PARENT_ENVS" value="1" />
diff --git a/.run/Debug RIE.run.xml b/.run/Debug RIE.run.xml
index b7defae..47a4f69 100644
--- a/.run/Debug RIE.run.xml	
+++ b/.run/Debug RIE.run.xml	
@@ -1,7 +1,7 @@
-<component name="ProjectRunConfigurationManager">
+<component name="ProjectRunConfigurationManager">
   <configuration default="false" name="Debug RIE" type="DotNetProject" factoryName=".NET Project">
     <log_file alias="semistep.log" path="$USER_HOME$/AppData/Local/Temp/Semistep/semistep.log" />
-    <option name="EXE_PATH" value="$PROJECT_DIR$/SemiStep/Artifacts/bin/SemiStep.UI/debug/SemiStep.UI.exe" />
+    <option name="EXE_PATH" value="$PROJECT_DIR$/SemiStep/Artifacts/bin/SemiStep.UI/debug/SemiStep.exe" />
     <option name="PROGRAM_PARAMETERS" value="--config-dir &quot;$PROJECT_DIR$/ConfigFiles/RIE&quot; --log-file &quot;$USER_HOME$/AppData/Local/Temp/Semistep/semistep.log&quot; --logging-level verbose" />
     <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/SemiStep/Artifacts/bin/SemiStep.UI/debug" />
     <option name="PASS_PARENT_ENVS" value="1" />
diff --git a/.run/Perf Gates.run.xml b/.run/Perf Gates.run.xml
index cbda65a..7099e27 100644
--- a/.run/Perf Gates.run.xml	
+++ b/.run/Perf Gates.run.xml	
@@ -1,4 +1,4 @@
-<component name="ProjectRunConfigurationManager">
+<component name="ProjectRunConfigurationManager">
   <configuration default="false" name="Perf Gates" type="DotNetProject" factoryName=".NET Project">
     <option name="EXE_PATH" value="$PROJECT_DIR$/SemiStep/Artifacts/bin/SemiStep.Tests/release/SemiStep.Tests.exe" />
     <option name="PROGRAM_PARAMETERS" value="-explicit only" />
diff --git a/.run/Publish.run.xml b/.run/Publish.run.xml
index 9124edd..43be02f 100644
--- a/.run/Publish.run.xml
+++ b/.run/Publish.run.xml
@@ -1,4 +1,4 @@
-<component name="ProjectRunConfigurationManager">
+<component name="ProjectRunConfigurationManager">
   <configuration default="false" name="publish" type="ShConfigurationType">
     <option name="SCRIPT_TEXT" value="dotnet publish SemiStep/SemiStep.UI/SemiStep.UI.csproj -c Release 2&gt;&amp;1" />
     <option name="INDEPENDENT_SCRIPT_PATH" value="true" />
diff --git a/.run/dotnet_restore.run.xml b/.run/dotnet_restore.run.xml
index 1d15c93..aaa8e83 100644
--- a/.run/dotnet_restore.run.xml
+++ b/.run/dotnet_restore.run.xml
@@ -1,8 +1,8 @@
-<component name="ProjectRunConfigurationManager">
+<component name="ProjectRunConfigurationManager">
   <configuration default="false" name="dotnet_restore" type="ShConfigurationType">
     <option name="SCRIPT_TEXT" value="dotnet restore SemiStep.slnx" />
-    <option name="INDEPENDENT_SCRIPT_PATH" value="false" />
-    <option name="SCRIPT_PATH" value="$PROJECT_DIR$/.run/dotnet_restore.ps1" />
+    <option name="INDEPENDENT_SCRIPT_PATH" value="true" />
+    <option name="SCRIPT_PATH" value="" />
     <option name="SCRIPT_OPTIONS" value="" />
     <option name="INDEPENDENT_SCRIPT_WORKING_DIRECTORY" value="true" />
     <option name="SCRIPT_WORKING_DIRECTORY" value="$PROJECT_DIR$" />
diff --git a/.zed/debug.json b/.zed/debug.json
index 5c6ae0e..ccefb05 100644
--- a/.zed/debug.json
+++ b/.zed/debug.json
@@ -3,7 +3,7 @@
 		"label": "Launch SemiStep.UI (MBE)",
 		"adapter": "netcoredbg",
 		"request": "launch",
-		"program": "${ZED_WORKTREE_ROOT}/SemiStep/Artifacts/bin/SemiStep.UI/debug/Semistep.dll",
+		"program": "${ZED_WORKTREE_ROOT}/SemiStep/Artifacts/bin/SemiStep.UI/debug/SemiStep.dll",
 		"cwd": "${ZED_WORKTREE_ROOT}/SemiStep/Artifacts/bin/SemiStep.UI/debug",
 		"args": [
 			"--config-dir",
@@ -20,7 +20,7 @@
 		"label": "Launch SemiStep.UI (MOCVD)",
 		"adapter": "netcoredbg",
 		"request": "launch",
-		"program": "${ZED_WORKTREE_ROOT}/SemiStep/Artifacts/bin/SemiStep.UI/debug/Semistep.dll",
+		"program": "${ZED_WORKTREE_ROOT}/SemiStep/Artifacts/bin/SemiStep.UI/debug/SemiStep.dll",
 		"cwd": "${ZED_WORKTREE_ROOT}/SemiStep/Artifacts/bin/SemiStep.UI/debug",
 		"args": [
 			"--config-dir",
@@ -37,7 +37,7 @@
 		"label": "Launch SemiStep.UI (RIE)",
 		"adapter": "netcoredbg",
 		"request": "launch",
-		"program": "${ZED_WORKTREE_ROOT}/SemiStep/Artifacts/bin/SemiStep.UI/debug/Semistep.dll",
+		"program": "${ZED_WORKTREE_ROOT}/SemiStep/Artifacts/bin/SemiStep.UI/debug/SemiStep.dll",
 		"cwd": "${ZED_WORKTREE_ROOT}/SemiStep/Artifacts/bin/SemiStep.UI/debug",
 		"args": [
 			"--config-dir",
diff --git a/CLAUDE.md b/CLAUDE.md
index 893d72e..b030516 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -13,6 +13,10 @@ dotnet run   --project SemiStep/SemiStep.UI/SemiStep.UI.csproj
 dotnet format SemiStep.slnx                   # pre-commit hook enforces this
 ```
 
+The build treats warnings and `.editorconfig` naming violations (IDE1006) as errors, so a new one
+fails CI instead of accumulating; formatting is not gated by the build. See
+`Docs/architecture/build-and-deployment.md`.
+
 ## Test
 
 ```powershell
diff --git a/Docs/architecture/build-and-deployment.md b/Docs/architecture/build-and-deployment.md
new file mode 100644
index 0000000..687a380
--- /dev/null
+++ b/Docs/architecture/build-and-deployment.md
@@ -0,0 +1,84 @@
+# Build and Deployment
+
+What the build enforces, what it does not, and where a released application looks on disk. Read
+this before relaxing an MSBuild property, renaming the assembly, or changing a deployed path.
+
+## What the build enforces
+
+`SemiStep/Directory.Build.props` governs the three projects — the file sits under `SemiStep/`,
+not at the repository root.
+
+- **`TreatWarningsAsErrors=true`.** Any compiler or analyzer warning fails the build, in Debug and
+  Release alike. The repository is at zero warnings; a new one has to be fixed, not accumulated.
+- **`WarningsNotAsErrors=NU1900;NU1901;NU1902;NU1903;NU1904`.** NuGet audit results depend on the
+  outside world. A newly published advisory against a transitive package, or an unreachable audit
+  source, must not turn restore red with no commit in the repository. The warnings still appear in
+  the build log.
+- **`AnalysisLevel` is deliberately absent.** Without it the rule set derives from
+  `TargetFramework` and stays fixed at net10.0's. `global.json` uses `rollForward: latestFeature`,
+  so the SDK floats across feature bands; setting `AnalysisLevel=latest` would let a new band break
+  the build with no change in the repository.
+- **`EnforceCodeStyleInBuild=true` plus `dotnet_diagnostic.IDE1006.severity = warning` in
+  `.editorconfig`.** Together these turn naming violations into build errors.
+
+**`EnforceCodeStyleInBuild` alone does not gate naming.** The `dotnet_naming_rule.*.severity`
+entries in `.editorconfig` drive the IDE only; build enforcement reads the IDE1006 diagnostic
+severity, which is unset by default. Measured: with only `EnforceCodeStyleInBuild=true`, a private
+field renamed to `StringMaxLengthProbe` built clean at zero warnings. Removing the
+`dotnet_diagnostic.IDE1006.severity` line silently disables the naming gate while leaving every
+naming rule visibly in place.
+
+## What the build does not enforce
+
+Whitespace and the `csharp_*` formatting preferences in `.editorconfig` are **not** part of the
+build gate. They bind through `dotnet format SemiStep.slnx --verify-no-changes` in
+`.git/hooks/pre-commit`, which is not versioned — a fresh clone has no hook — and
+`.github/workflows/ci.yml` runs no `dotnet format` step. Formatting is therefore enforced only on
+machines where someone installed the hook by hand.
+
+## Release symbols
+
+Release builds emit portable PDBs (`<DebugType>portable</DebugType>` in the Release
+`PropertyGroup`). The installer's `[Files]` section copies the publish directory wholesale with no
+`pdb` exclusion, so `SemiStep.pdb` ships next to the executable. That is what puts file names and
+line numbers into the Serilog stack traces coming off installed machines, which is the primary
+diagnostic for a deployed PLC-integration application.
+
+## Assembly name casing
+
+**The assembly is `SemiStep`.** Every `avares://` URI and every XAML `assembly=` reference carries
+that casing: `avares://SemiStep/...`, `clr-namespace:SemiStep.UI.RecipeGrid;assembly=SemiStep`. The
+build output is `SemiStep.dll`, the executable `SemiStep.exe`, the Russian satellite
+`ru/SemiStep.resources.dll`.
+
+`Docs/plans/completed/20260623-cell-change-highlight.md:149` instructs keeping `assembly=Semistep`
+lowercase and says "do not correct the casing". That instruction was correct when the assembly was
+named `Semistep` and is now obsolete; the historical plan stays as written. This section is the
+current rule.
+
+The full `AvaloniaFact` suite boots the real `App` and loads `avares://SemiStep/Styles/ColorPalette.axaml`,
+so a broken asset URI shows up as the UI tests failing as a group.
+
+## Deployed paths
+
+An installed application uses two roots under `C:\DISTR`:
+
+| Root | Default |
+|---|---|
+| Configuration | `C:\DISTR\Config\SemiStep\<preset>` (presets: `MBE`, `MOCVD`, `RIE`) |
+| Logs | `C:\DISTR\Logs\SemiStep\semistep.log` |
+
+Both are overridable per launch through `--config-dir` and `--log-file`; the installer's shortcuts
+pass `--config-dir` explicitly, one shortcut per preset.
+
+**The two sides of each path are duplicated by hand and nothing checks that they agree.** The
+application holds them as `StartupOptions.DefaultConfigDir` and `StartupOptions.DefaultLogFilePath`
+(`SemiStep/SemiStep.UI/StartupOptions.cs`); the installer holds them as `#define ConfigRoot` and
+`#define LogRoot` (`Installer/SemiStep.iss`). No build step, no test and no CI job compares them.
+The only thing that detects a divergence is a manual install followed by launching from a
+created shortcut — an application that silently falls back to a directory the installer never
+wrote configuration into looks like a missing-config error, not a path mismatch. Change one side,
+change the other in the same commit.
+
+NTFS is case-insensitive, so the casing of these paths is cosmetic on disk: an upgrade over an
+installation created with the older `Semistep` spelling keeps reading the same directories.
diff --git a/Docs/architecture/ui-localization.md b/Docs/architecture/ui-localization.md
index 7a1f1b3..eda8a2a 100644
--- a/Docs/architecture/ui-localization.md
+++ b/Docs/architecture/ui-localization.md
@@ -36,8 +36,8 @@ Two resource files live in `SemiStep.UI/Localization`:
 - `Resources.resx` — the neutral/invariant set, holding **English** values. English is the fallback
   because it aligns with the English logs, so a missing satellite degrades to English rather than to
   a partial mix.
-- `Resources.ru.resx` — the Russian set, compiled into the `ru/Semistep.resources.dll` satellite
-  assembly (the entry assembly name is `Semistep`).
+- `Resources.ru.resx` — the Russian set, compiled into the `ru/SemiStep.resources.dll` satellite
+  assembly (the entry assembly name is `SemiStep`).
 
 Resources are referenced from AXAML via `{x:Static l:Resources.Key}` (with
 `xmlns:l="clr-namespace:SemiStep.UI.Localization"`) and from C# via `Resources.Key`. Composite labels
diff --git a/Docs/perf/README.md b/Docs/perf/README.md
index f68925d..3f8de6a 100644
--- a/Docs/perf/README.md
+++ b/Docs/perf/README.md
@@ -34,7 +34,7 @@ takes the same flags and is what `dotnet run` launches under the hood — the di
 capture (below) is the one place that must call it directly.
 
 IDE entry points for the same invocation: the Rider run configuration **Perf Gates**
-(`SemiStep/.run/Perf Gates.run.xml`) and the Zed task **Perf Gates (explicit tests, Release)**
+(`.run/Perf Gates.run.xml`) and the Zed task **Perf Gates (explicit tests, Release)**
 (`.zed/tasks.json`). Rider's unit-test tree shows explicit tests as "not run" on Run All by
 design; use the run configuration, not the test gutter.
 
diff --git a/Docs/plans/20260721-build-hygiene.md b/Docs/plans/20260721-build-hygiene.md
new file mode 100644
index 0000000..074c630
--- /dev/null
+++ b/Docs/plans/20260721-build-hygiene.md
@@ -0,0 +1,441 @@
+# Build hygiene: Release symbols, warnings-as-errors, InternalsVisibleTo, name casing
+
+Closes #121.
+
+## Overview
+
+Five build-infrastructure changes. None changes application behaviour; all are cheap now and
+progressively more expensive later.
+
+- **Release ships no symbols.** `SemiStep/Directory.Build.props:17-19` sets `DebugSymbols=False`
+  and `DebugType=None` for Release. To be precise about what is and is not lost: the log is **not**
+  empty. `Program.cs:120` renders `{Exception}`, and exceptions are passed as objects rather than
+  strings — `Program.cs:52` and `:68` at the top-level catches, `S7Service.cs:194`,
+  `PlcSyncExecutor.cs:153`, `PlcLifecycleManager.cs:280,385`, `RecipeCoordinator.cs:489` below. So
+  the type, the message and the full frame chain with method names all arrive today; method names
+  live in assembly metadata and need no PDB. What is missing is the ` in <file>:line <n>` suffix on
+  every frame, which is exactly what a PDB supplies. On a twenty-frame trace through the sync
+  executor, knowing the method is often not enough to know which of its branches threw.
+- **Nothing enforces the current zero-warning state.** Verified 2026-07-21:
+  `dotnet build SemiStep.slnx -c Release` reports `Предупреждений: 0`. There is no
+  `TreatWarningsAsErrors` or `EnforceCodeStyleInBuild` anywhere in the props or the csproj files.
+  A clean build is the cheapest possible moment to lock the invariant in.
+- **`InternalsVisibleTo` is declared two different ways.** `SemiStep.Core.csproj:15` uses the SDK
+  item; `SemiStep.UI.csproj:9-13` uses a raw `AssemblyAttribute`. Same intent, two spellings.
+- **The assembly is named `Semistep` while everything else is `SemiStep`.**
+  `SemiStep.UI.csproj:5`, and the build output confirms it:
+  `Artifacts\bin\SemiStep.UI\release\Semistep.dll`. The name is load-bearing in XAML: eleven
+  `avares://Semistep/...` URIs and one `assembly=Semistep` reference resolve against it —
+  twelve lines, counted.
+- **The deployed `C:\DISTR` paths carry the same wrong casing**, in both the configuration root
+  and the log root. Task 5.
+
+Benefits: readable production stack traces, a warning floor that cannot silently rise, style rules
+enforced by something that travels with the repository, one way to declare test visibility, and a
+product whose executable and deployed directories match its name.
+
+## Context (from discovery)
+
+Every claim below was read during this planning session.
+
+- **`SemiStep/Directory.Build.props`** — repo-wide MSBuild defaults. Note the path: it sits under
+  `SemiStep/`, not at the repository root, so it governs the three projects and nothing else.
+  `:17-19` is the Release block being changed.
+- **`SemiStep/SemiStep.UI/SemiStep.UI.csproj`** — `:5` `<AssemblyName>Semistep</AssemblyName>`;
+  `:9-13` the raw `AssemblyAttribute` form of `InternalsVisibleTo`.
+- **`SemiStep/SemiStep.Core/SemiStep.Core.csproj:15`** — `<InternalsVisibleTo Include="SemiStep.Tests"/>`,
+  the SDK item, the form to standardise on.
+- **XAML references keyed on the assembly name** — `App.axaml:9,67,68`;
+  `MainWindow/RecipeToolBar.axaml:40,50,62,72,82,94,104`;
+  `RecipeGrid/Transposed/TransposedRecipeGridView.axaml:13`, all `avares://Semistep/...`; and
+  `Styles/DataGridStyles.axaml:3`, `clr-namespace:SemiStep.UI.RecipeGrid;assembly=Semistep`.
+  `Docs/architecture/ui-localization.md:39-40` documents the satellite as
+  `ru/Semistep.resources.dll` and states "the entry assembly name is `Semistep`".
+- **`SemiStep/SemiStep.Tests/TestAppBuilder.cs:18`** — `AppBuilder.Configure<App>()`. The headless
+  suite boots the real `App`, so every `AvaloniaFact` loads `avares://Semistep/Styles/ColorPalette.axaml`
+  through `App.axaml:9`. That makes the suite the real assertion for Task 4, not a formality.
+- **`Installer/SemiStep.iss:11`** — `#define AppExeName "Semistep.exe"`. `:15` points `SrcBinDir`
+  at `..\SemiStep\Artifacts\publish\SemiStep.UI\release_win-x64`.
+- **`Installer/SemiStep.iss` `[Files]`** — the binaries line is
+  `Source: "{#SrcBinDir}\*"; Flags: ignoreversion recursesubdirs createallsubdirs`, and a grep for
+  `pdb` and `Excludes` across the file returns nothing. **The PDB therefore ships automatically
+  once it exists; no installer change is needed for that half of the work.**
+- **`Installer/SemiStep.iss` `[InstallDelete]` at `:71-79`** — six entries removing the legacy flat
+  config layout (`actions`, `columns`, `connection`, `groups`, `properties`, `ui`) from
+  `C:\DISTR\Config\Semistep\`, per the comment above them. Note the section: `[InstallDelete]`, run
+  at install time, not `[UninstallDelete]`. Uninstall has never removed configuration, a deliberate
+  decision recorded in `Docs/plans/completed/20260518-startup-options-installer-and-dev-runners.md:220`.
+- **`.zed/debug.json:6,23,40`** — three `program` entries pointing at
+  `Artifacts/bin/SemiStep.UI/debug/Semistep.dll`.
+- **`.github/workflows/ci.yml`** — restore, build, test. **No formatting or style check.** Its
+  `paths` filter is `SemiStep/**`, `ConfigFiles/**`, `global.json`, so edits confined to
+  `Installer/` or `.zed/` do not trigger it at all.
+- **`.git/hooks/pre-commit`** — runs `dotnet format SemiStep.slnx --verify-no-changes`. Not
+  versioned: a fresh clone has no hook. Style is therefore enforced today only on machines where
+  someone installed it by hand.
+- **`global.json`** — `"version": "10.0.100"`, `"rollForward": "latestFeature"`. The SDK floats
+  across feature bands within 10.0; the installed one is 10.0.302.
+- **`.github/workflows/release.yml:57`** — `dotnet publish SemiStep/SemiStep.UI/SemiStep.UI.csproj -c Release -p:Version=...`;
+  `:71` — `iscc.exe /DAppVersion=... Installer/SemiStep.iss`. Neither names the assembly, so both
+  survive the rename untouched.
+
+**The deployed `C:\DISTR` paths are in scope.** The product is below v1.0.0 and no installation
+in the field needs protecting, so consistency wins over compatibility. Two deployed roots exist,
+not one:
+
+- **Configuration** — `StartupOptions.cs:11`, `DefaultConfigDir = @"C:\DISTR\Config\Semistep\MBE"`,
+  mirrored by `Installer/SemiStep.iss` in `[Files]` at `:88-90` and in the `--config-dir` parameter
+  of every `[Icons]` and `[Run]` line.
+- **Logs** — `StartupOptions.cs:14`, `DefaultLogFilePath = @"C:\DISTR\Logs\Semistep\semistep.log"`,
+  documented for users at `Docs/readme.md:408`.
+
+`Temp/Semistep` in `.run/*.run.xml` stays as is: a developer-machine log path with no deployed
+counterpart.
+
+## Development Approach
+
+- **Testing approach**: Regular. This is build and deployment configuration; MSBuild properties
+  have no unit tests, and inventing some would be theatre. Each task instead states the exact
+  command that proves it landed, run against a real build.
+- Complete each task fully before starting the next; run the test suite between tasks.
+- **Tasks 4 and 5 are the last substantive changes, in that order.** They are the only ones that
+  rename a shipped artifact — the executable and the deployed directories — so everything else is
+  proven green before the renames muddy the diff. Tasks 6 and 7 verify and document.
+- **The existing suite is a real regression guard for Task 4.** `TestAppBuilder` boots the real
+  `App`, so all 615 `AvaloniaFact` tests load an `avares://Semistep/` URI. If the rename breaks
+  asset resolution they go red as a group. Whether Avalonia resolves that URI case-insensitively is
+  unknown and is assumed nowhere in this plan — Task 4 settles it by running the suite.
+- **Task 2's settings are measured, not predicted.** Applied to `Directory.Build.props`, a clean
+  Release build on 2026-07-21 reports `Предупреждений: 0`, `Ошибок: 0`. Its "if some other
+  diagnostic fires" branch is a guard against future change, not a forecast about this one.
+
+## Acceptance Evidence
+
+Before-state measured 2026-07-21, on this machine, each as a command.
+
+| Claim | Before | After |
+|---|---|---|
+| Release ships no symbols | `dotnet publish ... -c Release` then `ls **/release_win-x64/*.pdb` → nothing | the same glob lists `SemiStep.pdb` |
+| Warnings are not enforced | `grep -rn 'TreatWarningsAsErrors' --include='*.props' --include='*.csproj' .` → no hits | the grep hits `Directory.Build.props`, and a deliberately introduced warning fails the build |
+| Style is enforced only where a hook exists | `grep -n 'format' .github/workflows/ci.yml` → no hits | a naming violation from `.editorconfig` fails `dotnet build`, so CI catches it |
+| Two spellings of InternalsVisibleTo | `grep -rn 'AssemblyAttribute' --include='*.csproj' .` → one hit in `SemiStep.UI.csproj` | no hits; `SemiStep.Tests` still compiles and passes |
+| Assembly casing | build output names `Semistep.dll`; `grep -rn 'Semistep' --include='*.axaml' SemiStep/` → 12 hits | build output names `SemiStep.dll`; that grep returns nothing; the full suite is green |
+| Deployed paths carry the wrong casing | `grep -rn 'Config.Semistep\|Logs.Semistep' --include='*.cs' --include='*.iss' --include='*.md' .` → hits in `StartupOptions.cs`, `SemiStep.iss`, `Docs/readme.md` | that grep returns nothing outside `Docs/plans/` |
+
+**End-to-end proof** (manual, and the gate before shipping): build the installer with
+`iscc.exe /DAppVersion=0.0.1 Installer/SemiStep.iss`, install it, launch from the created
+shortcut, confirm the application starts and reads its configuration from the **new**
+`C:\DISTR\Config\SemiStep\<preset>`, then force an exception and confirm the Serilog file carries
+file and line numbers.
+
+## Progress Tracking
+
+- Mark completed items `[x]` immediately.
+- `➕` for newly discovered tasks, `⚠️` for blockers.
+
+## Solution Overview
+
+Four of the five changes are build configuration confined to `Directory.Build.props` and two
+csproj files. **Task 5 is not**: it changes two `public const` values on `StartupOptions` and
+therefore changes where a deployed application looks for its configuration and writes its log.
+Task 4 reaches into XAML, which the assembly name is embedded in. Neither is behaviour-neutral in
+the way the other three are, and the diff deserves reading with that in mind.
+
+PDBs **ship alongside the executable** rather than being archived per release tag. That costs a
+few megabytes in the installer and makes internal method names readable to anyone who looks; in
+exchange, a stack trace from a customer machine is actionable without matching a build against an
+archived symbol file. Given that the Serilog file is the primary diagnostic for a deployed
+PLC-integration application, that trade is worth making.
+
+`DebugType=portable` rather than `embedded`: portable keeps the PDB a separate file, which the
+installer already picks up, and leaves the assembly itself unchanged in size.
+
+## Technical Details
+
+**`Directory.Build.props` Release block**, replacing `:17-19`:
+
+```xml
+<PropertyGroup Condition="'$(Configuration)'=='Release'">
+  <DebugType>portable</DebugType>
+</PropertyGroup>
+```
+
+`DebugSymbols` is dropped rather than set to `True` — the SDK derives it from `DebugType`, and
+stating both invites them to disagree. `portable` restates the SDK default, so the line is
+technically redundant; it is kept deliberately, because the Release block existed only to hold the
+`None` override and an empty-looking block is a worse record of the reversal than an explicit one.
+
+**Warning enforcement**, in the unconditional `PropertyGroup` so it binds Debug as well as
+Release. The build is at zero warnings, so the cost today is nil, and a violation is better seen
+at the keystroke than at the push:
+
+```xml
+<TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+<WarningsNotAsErrors>NU1901;NU1902;NU1903;NU1904</WarningsNotAsErrors>
+<EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>
+```
+
+**The NuGet audit codes are exempted for the same reason `AnalysisLevel=latest` is refused.**
+`NuGetAudit` defaults on with audit mode `all` on the .NET 10 SDK, and nothing here disables it, so
+`TreatWarningsAsErrors` alone would turn NU1901-NU1904 into restore errors the day an advisory is
+published against any direct or transitive package — CI red with no commit in the repository.
+`dotnet list package --vulnerable --include-transitive` reports nothing today, so the exemption
+costs nothing and the warnings still surface in the build log.
+
+**`AnalysisLevel` is deliberately absent.** Without it the level derives from `TargetFramework`,
+which fixes the rule set at net10.0's. Setting it to `latest` makes the set track whatever the
+installed SDK considers newest — and `global.json` uses `rollForward: latestFeature`, so the SDK
+already floats across feature bands within 10.0 (pinned floor 10.0.100, installed 10.0.302).
+Combined with `TreatWarningsAsErrors`, a new band could break the build with no change in the
+repository at all. The TFM-derived default is equally strict today and does not move on its own.
+
+**`EnforceCodeStyleInBuild` is not a duplicate of the pre-commit hook**, which is what it looks
+like at first glance. `ci.yml` runs no formatting check, and `.git/hooks/pre-commit` is not
+versioned, so a fresh clone has none. Today the five `severity = warning` naming rules in
+`.editorconfig` bind only on machines where someone installed the hook by hand. This setting makes
+them part of the build, which is the only style gate that travels with the repository.
+
+## What Goes Where
+
+- **Implementation Steps** — changes inside this repository.
+- **Post-Completion** — the installer build and the install-and-launch check, which need a Windows
+  session and Inno Setup.
+
+## Implementation Steps
+
+### Task 1: Emit portable PDBs in Release
+
+**Files:**
+- Modify: `SemiStep/Directory.Build.props`
+
+- [x] replace the Release `PropertyGroup` at `:17-19` with `<DebugType>portable</DebugType>`,
+      dropping the explicit `DebugSymbols`
+- [x] build: `dotnet build SemiStep.slnx -c Release` — succeeds
+- [x] verify the symbol file appears next to the assembly:
+      `ls SemiStep/Artifacts/bin/SemiStep.UI/release/*.pdb`
+- [x] publish as the release workflow does:
+      `dotnet publish SemiStep/SemiStep.UI/SemiStep.UI.csproj -c Release -p:Version=0.0.1`
+      and confirm a `.pdb` under `SemiStep/Artifacts/publish/SemiStep.UI/release_win-x64/`
+- [x] run the test suite: `dotnet test SemiStep.slnx` — must pass before Task 2
+
+### Task 2: Lock the zero-warning state in centrally
+
+**Files:**
+- Modify: `SemiStep/Directory.Build.props`
+- Modify: `.editorconfig` (added during the task — see the `➕` note below)
+
+- [x] add `TreatWarningsAsErrors` and `EnforceCodeStyleInBuild` to the unconditional
+      `PropertyGroup`. Do **not** add `AnalysisLevel` — see Technical Details
+- [x] rebuild clean: `dotnet build SemiStep.slnx -c Release --no-incremental`
+- [x] prove the warning gate bites: introduce an unused local in any file, confirm the build
+      fails, remove it
+- [x] prove the style gate bites: rename a private field to violate one of the five
+      `severity = warning` naming rules in `.editorconfig`, confirm the build fails, revert it
+- [x] if some other diagnostic fires, record its ID here under `➕` and suppress it individually in
+      `NoWarn` — never by weakening the two properties. The measurement says nothing should fire
+- [x] run the test suite — must pass before Task 3
+
+➕ **The style gate did not bite until `.editorconfig` named IDE1006 explicitly.** With only
+`EnforceCodeStyleInBuild=true`, both a private field renamed to `StringMaxLengthProbe` and a
+private method renamed to `resolveStringMaxLengthProbe` built clean: `Предупреждений: 0`. The
+`dotnet_naming_rule.*.severity = warning` entries drive the IDE, not the build; build enforcement
+reads the IDE1006 diagnostic severity, which is unset by default. Added to `.editorconfig` above
+the naming rules:
+
+```
+dotnet_diagnostic.IDE1006.severity = warning
+```
+
+Both probes then failed the build with `error IDE1006`, and with the probes reverted the clean
+Release build stays at `Предупреждений: 0`, `Ошибок: 0` — the existing code has no naming
+violations. `.editorconfig` is therefore a fourth file in this task, beyond the Files block. No
+`NoWarn` entry was needed; nothing unanticipated fired.
+
+### Task 3: One spelling of InternalsVisibleTo
+
+**Files:**
+- Modify: `SemiStep/SemiStep.UI/SemiStep.UI.csproj`
+
+- [x] replace the `AssemblyAttribute` `ItemGroup` at `:9-13` with
+      `<ItemGroup><InternalsVisibleTo Include="SemiStep.Tests"/></ItemGroup>`, matching
+      `SemiStep.Core.csproj:15`
+- [x] verify no raw form survives: `grep -rn 'AssemblyAttribute' --include='*.csproj' .` returns
+      nothing
+- [x] run the test suite — a test reaching an `internal` member of `SemiStep.UI` is the real
+      assertion here, so a green suite is the proof the attribute still applies
+- [x] must pass before Task 4
+
+### Task 4: Align the assembly name casing
+
+The name is embedded in XAML, so this is not a one-line rename. Whether Avalonia resolves
+`avares://` case-insensitively is unknown; the suite settles it rather than an assumption.
+
+**Files:**
+- Modify: `SemiStep/SemiStep.UI/SemiStep.UI.csproj`
+- Modify: `SemiStep/SemiStep.UI/App.axaml`
+- Modify: `SemiStep/SemiStep.UI/MainWindow/RecipeToolBar.axaml`
+- Modify: `SemiStep/SemiStep.UI/RecipeGrid/Transposed/TransposedRecipeGridView.axaml`
+- Modify: `SemiStep/SemiStep.UI/Styles/DataGridStyles.axaml`
+- Modify: `Installer/SemiStep.iss`
+- Modify: `.zed/debug.json`
+- Modify: `Docs/architecture/ui-localization.md`
+
+- [x] `SemiStep.UI.csproj:5` — `<AssemblyName>SemiStep</AssemblyName>`
+- [x] every `avares://Semistep/` → `avares://SemiStep/`: `App.axaml:9,67,68`,
+      `RecipeToolBar.axaml:40,50,62,72,82,94,104`, `TransposedRecipeGridView.axaml:13`
+- [x] `DataGridStyles.axaml:3` — `assembly=Semistep` → `assembly=SemiStep`. A plan under
+      `Docs/plans/completed/` instructs leaving this casing alone; that instruction keeps the
+      reference matching the assembly name, which this task renames, so it no longer applies
+- [x] `Installer/SemiStep.iss:11` — `#define AppExeName "SemiStep.exe"`
+- [x] `.zed/debug.json:6,23,40` — `Semistep.dll` → `SemiStep.dll`
+- [x] `Docs/architecture/ui-localization.md:39-40` — the satellite becomes
+      `ru/SemiStep.resources.dll` and the entry assembly name `SemiStep`
+- [x] leave the `C:\DISTR` paths alone in this task — they are Task 5
+- [x] delete the stale output so a leftover `Semistep.dll` cannot mask the change:
+      `rm -rf SemiStep/Artifacts/bin SemiStep/Artifacts/publish`
+- [x] rebuild and confirm the new name:
+      `dotnet build SemiStep.slnx -c Release` prints `SemiStep.dll`
+- [x] **run the full test suite — this is the assertion, not a formality.** All 615 `AvaloniaFact`
+      tests boot the real `App` and load `avares://SemiStep/Styles/ColorPalette.axaml`. If asset
+      resolution broke, they fail as a group and the cause is this task
+- [x] confirm no reference to the old casing survives outside the `C:\DISTR` paths:
+      `grep -rn 'Semistep' .zed Installer .github Docs SemiStep --include='*.json' --include='*.iss' --include='*.yml' --include='*.axaml' --include='*.cs' --include='*.md'`
+      returns only `C:\DISTR` lines and completed-plan history. Note `--include='*.axaml'`: without
+      it the check is blind to the twelve references above
+
+### Task 5: Align the deployed `C:\DISTR` paths
+
+**Files:**
+- Modify: `SemiStep/SemiStep.UI/StartupOptions.cs`
+- Modify: `Installer/SemiStep.iss`
+- Modify: `Docs/readme.md`
+
+- [x] `StartupOptions.cs:11` — `C:\DISTR\Config\Semistep\MBE` → `C:\DISTR\Config\SemiStep\MBE`
+- [x] `StartupOptions.cs:14` — `C:\DISTR\Logs\Semistep\semistep.log` →
+      `C:\DISTR\Logs\SemiStep\semistep.log`. Renaming one root and leaving the other is worse
+      than either doing both or doing neither
+- [x] `Installer/SemiStep.iss` — the `[Files]` `DestDir` at `:88-90` and the `--config-dir`
+      parameter of every `[Icons]` and `[Run]` line
+- [x] **delete the six `[InstallDelete]` entries at `:71-79`.** No machine carries the legacy flat
+      layout, so the cleanup has nothing left to do and the entries are dead weight. Renaming them
+      to the new casing would have worked just as well — NTFS is case-insensitive, so
+      `C:\DISTR\Config\Semistep\actions` and `C:\DISTR\Config\SemiStep\actions` are the same
+      directory — but keeping cleanup for a layout nothing carries is not worth the lines
+- [x] `Docs/readme.md:408` — the user-facing log path
+- [x] verify the old literals are gone, not merely consistent:
+      `grep -rn 'Config.Semistep\|Logs.Semistep' --include='*.cs' --include='*.iss' --include='*.md' .`
+      returns nothing outside `Docs/plans/`
+- [x] verify the code and the installer agree on the new literal, since nothing enforces it at
+      build time: `grep -rn 'DISTR' --include='*.cs' --include='*.iss' .` shows `SemiStep` in every
+      hit
+- [x] run the test suite. **It proves nothing about this task** — no test references
+      `DefaultConfigDir` or `DefaultLogFilePath` — and is run only to confirm nothing else broke.
+      The real check is the manual install in Post-Completion
+
+**Consequence, for the release notes.** None on Windows, and that is worth stating explicitly.
+NTFS is case-insensitive: `C:\DISTR\Config\Semistep\MBE` and `C:\DISTR\Config\SemiStep\MBE`
+resolve to the same directory, verified empirically on this machine. A machine that already has
+the application therefore keeps reading its existing configuration, the installer overwrites the
+existing tree rather than writing a second copy, and no edit made before the upgrade is stranded.
+The rename is cosmetic on disk; only newly created directories pick up the new casing.
+
+### Task 6: Verify acceptance criteria
+
+- [x] every row of the Acceptance Evidence table checked, After column reproduced
+- [x] full suite green: `dotnet test SemiStep.slnx`
+- [x] clean Release build green: `dotnet build SemiStep.slnx -c Release --no-incremental`
+- [x] publish green, with a `.pdb` in the output
+- [x] `git diff --stat` against the branch base touches only the files named in the Files blocks
+      of Tasks 1-5, plus the follow-on files listed below, plus `CLAUDE.md`,
+      `Docs/architecture/` and this plan file once Task 7 has run.
+      The branch base commit is a separate change that moves the solution file to the repository
+      root and drags `.run/*`, `.zed/tasks.json`, `.github/workflows/ci.yml`,
+      `.claude/skills/make-release/SKILL.md` and `CLAUDE.md` with it; every command in this plan
+      assumes that layout, so compare against that commit, not against `origin/master`
+
+**Verification run, 2026-07-21.** Base commit `af24bc4`.
+
+| Row | Command | Result |
+|---|---|---|
+| Release ships symbols | `dotnet publish ... -c Release -p:Version=0.0.1` | `release_win-x64/SemiStep.pdb` present |
+| Warnings enforced | `grep -rn 'TreatWarningsAsErrors' --include='*.props' --include='*.csproj' .` | one hit, `SemiStep/Directory.Build.props:10` |
+| Warning gate bites | probe file with an unused local | `error CS0219`, build fails |
+| Style gate bites | same probe, private field `BadlyNamedField` | `error IDE1006`, build fails |
+| One spelling of InternalsVisibleTo | `grep -rn 'AssemblyAttribute' --include='*.csproj' .` | no hits |
+| Assembly casing | clean Release build | `Artifacts\bin\SemiStep.UI\release\SemiStep.dll`; `grep -rn 'Semistep' --include='*.axaml' SemiStep/` returns nothing |
+| Deployed paths | `grep -rn 'Config.Semistep\|Logs.Semistep' --include='*.cs' --include='*.iss' --include='*.md' .` | hits only under `Docs/plans/` |
+| Clean Release build | `dotnet build SemiStep.slnx -c Release --no-incremental` | `Предупреждений: 0`, `Ошибок: 0` |
+| Full suite | `dotnet test SemiStep.slnx` | 1444 passed, 0 failed |
+
+➕ **The diff-scope check needed widening.** `git diff --stat af24bc4 HEAD` also touches
+`.github/workflows/ci.yml`, `.run/*.run.xml`, `Docs/perf/README.md` and
+`SemiStep/SemiStep.UI/Assets/Icons/README.md`, none of which appear in a Files block. Each is a
+direct consequence of the work rather than unrelated drift, so the check's file list was wrong,
+not the diff: `ci.yml` gained `.editorconfig` and `SemiStep.slnx` to its `paths` filter so a change
+to either actually triggers CI; the two README files carried `avares://Semistep/` and a stale
+`SemiStep/.run/` path; the `.run` configurations named `SemiStep.UI.exe`, which the Task 4 rename
+made `SemiStep.exe`. The checkbox above now names them.
+
+➕ **`Installer/SemiStep.iss:21` reads `#define LogRoot "C:\DISTR\Logs"`**, the parent, so Task 5's
+"`grep -rn 'DISTR' ...` shows `SemiStep` in every hit" does not hold literally for that line or for
+the `; ... we write to Program Files and C:\DISTR` comment at `:59`. Not a defect: the installer
+only pre-creates the `Logs` root and the application appends `SemiStep\semistep.log` itself. The
+config side, where the installer does write into the product directory, is
+`#define ConfigRoot "C:\DISTR\Config\SemiStep"` and carries the correct casing.
+
+### Task 7: [Final] Update documentation
+
+`CLAUDE.md` closes with "do not add specifics here", so it gets one line and the details go to
+`Docs/`.
+
+**Files:**
+- Modify: `CLAUDE.md`
+- Add: `Docs/architecture/build-and-deployment.md`
+
+- [x] `CLAUDE.md`, Build section, one line: the build treats warnings and `.editorconfig` **naming**
+      violations (IDE1006) as errors, so a new one fails CI rather than accumulating. Say naming
+      specifically — whitespace and the `csharp_*` formatting preferences still bind only through
+      the unversioned `.git/hooks/pre-commit`, and `ci.yml` runs no `dotnet format` step
+- [x] `Docs/architecture/` — record the deployed paths in their new form,
+      `C:\DISTR\Config\SemiStep\` and `C:\DISTR\Logs\SemiStep\`, and that they are duplicated
+      between `StartupOptions.cs` and `Installer/SemiStep.iss` with nothing checking that the two
+      agree
+- [x] `Docs/architecture/` — one line stating the current rule: the assembly is `SemiStep` and every
+      `avares://` URI and `assembly=` reference carries that casing. `Docs/plans/completed/20260623-cell-change-highlight.md:149`
+      instructs the opposite ("do not correct the casing"); that historical record stays as written,
+      so a future reader who hits it needs the current rule stated somewhere live
+- [x] move this plan to `Docs/plans/completed/`
+
+**Decision: a new file, `Docs/architecture/build-and-deployment.md`.** Every existing document
+under `Docs/architecture/` is scoped to one subject — `error-reporting.md`, `exit-flow.md`,
+`ui-localization.md`, `headless-ui-testing.md` — and none covers build configuration or deployment
+layout, so there was no host to extend. It also records the IDE1006 finding from Task 2, which
+otherwise survives only in an `.editorconfig` comment and in this plan.
+
+## Post-Completion
+
+*No checkboxes — these need a Windows session with Inno Setup and a real install.*
+
+**Manual verification, the gate before shipping:**
+
+1. `iscc.exe /DAppVersion=0.0.1 Installer/SemiStep.iss` builds without error.
+2. The produced installer installs, and `{app}` contains `SemiStep.exe` and `SemiStep.pdb`.
+3. A shortcut created by the installer launches the application, and it reads its configuration
+   from `C:\DISTR\Config\SemiStep\<preset>` — the new path. This is the check that Task 5 landed in
+   both the code and the installer, which nothing at build time verifies.
+4. The log appears at `C:\DISTR\Logs\SemiStep\semistep.log`.
+5. Force an exception; the Serilog file shows file names and line numbers in the stack trace.
+
+**Existing installations:** nothing to clean up. NTFS is case-insensitive, so Inno writes
+`SemiStep.exe` to the same filesystem path the old `Semistep.exe` occupies and replaces it in
+place; an in-place upgrade leaves no second executable behind.
+
+**CI:** `.github/workflows/release.yml:57,71` names neither the assembly nor the executable, so no
+workflow change is required. Note that `ci.yml`'s `paths` filter (`SemiStep/**`, `ConfigFiles/**`,
+`global.json`) does not cover `Installer/` or `.zed/`, so the Task 4 and 5 edits to those
+directories will not trigger CI. Pre-existing, and the reason the first release run is the
+confirmation rather than a green check on the pull request.
+
+**Executed by exec:**
+- branch: build-hygiene
+- progress file: /tmp/progress-20260721-build-hygiene.txt
diff --git a/Docs/readme.md b/Docs/readme.md
index 39bf602..4cc8e6f 100644
--- a/Docs/readme.md
+++ b/Docs/readme.md
@@ -405,7 +405,7 @@ _Сообщение об ошибке соединения с ПЛК в пане
 
 ## 5. Логирование
 
-- Путь к файлу: `C:\DISTR\Logs\Semistep\semistep.log` (переопределяется ключом запуска `--log-file`).
+- Путь к файлу: `C:\DISTR\Logs\SemiStep\semistep.log` (переопределяется ключом запуска `--log-file`).
 - Ротация по размеру: 5 МБ на файл, хранится до 5 файлов.
 - Формат записи: метка времени, уровень, источник, сообщение, исключение.
 - Уровень детализации задаётся ключом запуска `--logging-level`.
diff --git a/Installer/SemiStep.iss b/Installer/SemiStep.iss
index 0077016..44bcac4 100644
--- a/Installer/SemiStep.iss
+++ b/Installer/SemiStep.iss
@@ -8,13 +8,17 @@
 
 #define AppName      "SemiStep"
 #define AppPublisher "Inc Semiteq"
-#define AppExeName   "Semistep.exe"
+#define AppExeName   "SemiStep.exe"
 #define AppId        "{{8B3F2C1A-4D7E-4F9B-A2C6-1E5D8F3B7A4C}"
 
 ; Paths relative to the location of this .iss file (Installer/)
 #define SrcBinDir    "..\SemiStep\Artifacts\publish\SemiStep.UI\release_win-x64"
 
 #define SrcCfgDir    "..\ConfigFiles"
+
+; Deployed roots — must match StartupOptions.DefaultConfigDir / DefaultLogFilePath
+#define ConfigRoot   "C:\DISTR\Config\SemiStep"
+#define LogRoot      "C:\DISTR\Logs"
 #define AppIconFile       "..\SemiStep\SemiStep.UI\logo.ico"
 #define LicenseFile       ".\LICENSE.txt"
 #define WizardImageLarge  ".\WizardImageFile.bmp"
@@ -68,16 +72,6 @@ Name: "preset_mocvd"; Description: "MOCVD"; GroupDescription: "Configuration pre
 Name: "preset_rie";   Description: "RIE";   GroupDescription: "Configuration preset:"; Flags: exclusive
 Name: "desktopicon";  Description: "{cm:CreateDesktopIcon}"; GroupDescription: "{cm:AdditionalIcons}"; Flags: unchecked
 
-[InstallDelete]
-; Remove legacy flat-layout config subfolders from prior installations.
-; The new preset-nested layout (MBE\, MOCVD\) is left intact.
-Type: filesandordirs; Name: "C:\DISTR\Config\Semistep\actions"
-Type: filesandordirs; Name: "C:\DISTR\Config\Semistep\columns"
-Type: filesandordirs; Name: "C:\DISTR\Config\Semistep\connection"
-Type: filesandordirs; Name: "C:\DISTR\Config\Semistep\groups"
-Type: filesandordirs; Name: "C:\DISTR\Config\Semistep\properties"
-Type: filesandordirs; Name: "C:\DISTR\Config\Semistep\ui"
-
 [Files]
 ; Application binaries
 Source: "{#SrcBinDir}\*"; DestDir: "{app}"; Flags: ignoreversion recursesubdirs createallsubdirs
@@ -85,25 +79,24 @@ Source: "{#SrcBinDir}\*"; DestDir: "{app}"; Flags: ignoreversion recursesubdirs
 ; Configuration files — both presets are always installed under a hardcoded absolute path
 ; the application reads (see StartupOptions.DefaultConfigDir). The selected [Tasks] entry
 ; controls only which preset the created shortcuts target.
-Source: "..\ConfigFiles\MBE\*";   DestDir: "C:\DISTR\Config\Semistep\MBE";   Flags: ignoreversion recursesubdirs createallsubdirs
-Source: "..\ConfigFiles\MOCVD\*"; DestDir: "C:\DISTR\Config\Semistep\MOCVD"; Flags: ignoreversion recursesubdirs createallsubdirs
-Source: "..\ConfigFiles\RIE\*";   DestDir: "C:\DISTR\Config\Semistep\RIE";   Flags: ignoreversion recursesubdirs createallsubdirs
+Source: "{#SrcCfgDir}\MBE\*";   DestDir: "{#ConfigRoot}\MBE";   Flags: ignoreversion recursesubdirs createallsubdirs
+Source: "{#SrcCfgDir}\MOCVD\*"; DestDir: "{#ConfigRoot}\MOCVD"; Flags: ignoreversion recursesubdirs createallsubdirs
+Source: "{#SrcCfgDir}\RIE\*";   DestDir: "{#ConfigRoot}\RIE";   Flags: ignoreversion recursesubdirs createallsubdirs
 
 [Dirs]
 ; Ensure the logs directory exists before the app first runs
-;   C:\DISTR\Logs  (see StartupOptions.DefaultLogFilePath)
-Name: "C:\DISTR\Logs"
+Name: "{#LogRoot}"
 
 [Icons]
-Name: "{group}\{#AppName}"; Filename: "{app}\{#AppExeName}"; IconFilename: "{app}\{#AppExeName}"; Parameters: "--config-dir ""C:\DISTR\Config\Semistep\MBE"""; Tasks: preset_mbe
-Name: "{group}\{#AppName}"; Filename: "{app}\{#AppExeName}"; IconFilename: "{app}\{#AppExeName}"; Parameters: "--config-dir ""C:\DISTR\Config\Semistep\MOCVD"""; Tasks: preset_mocvd
-Name: "{group}\{#AppName}"; Filename: "{app}\{#AppExeName}"; IconFilename: "{app}\{#AppExeName}"; Parameters: "--config-dir ""C:\DISTR\Config\Semistep\RIE"""; Tasks: preset_rie
+Name: "{group}\{#AppName}"; Filename: "{app}\{#AppExeName}"; IconFilename: "{app}\{#AppExeName}"; Parameters: "--config-dir ""{#ConfigRoot}\MBE"""; Tasks: preset_mbe
+Name: "{group}\{#AppName}"; Filename: "{app}\{#AppExeName}"; IconFilename: "{app}\{#AppExeName}"; Parameters: "--config-dir ""{#ConfigRoot}\MOCVD"""; Tasks: preset_mocvd
+Name: "{group}\{#AppName}"; Filename: "{app}\{#AppExeName}"; IconFilename: "{app}\{#AppExeName}"; Parameters: "--config-dir ""{#ConfigRoot}\RIE"""; Tasks: preset_rie
 Name: "{group}\{cm:UninstallProgram,{#AppName}}"; Filename: "{uninstallexe}"
-Name: "{autodesktop}\{#AppName}"; Filename: "{app}\{#AppExeName}"; IconFilename: "{app}\{#AppExeName}"; Parameters: "--config-dir ""C:\DISTR\Config\Semistep\MBE"""; Tasks: desktopicon and preset_mbe
-Name: "{autodesktop}\{#AppName}"; Filename: "{app}\{#AppExeName}"; IconFilename: "{app}\{#AppExeName}"; Parameters: "--config-dir ""C:\DISTR\Config\Semistep\MOCVD"""; Tasks: desktopicon and preset_mocvd
-Name: "{autodesktop}\{#AppName}"; Filename: "{app}\{#AppExeName}"; IconFilename: "{app}\{#AppExeName}"; Parameters: "--config-dir ""C:\DISTR\Config\Semistep\RIE"""; Tasks: desktopicon and preset_rie
+Name: "{autodesktop}\{#AppName}"; Filename: "{app}\{#AppExeName}"; IconFilename: "{app}\{#AppExeName}"; Parameters: "--config-dir ""{#ConfigRoot}\MBE"""; Tasks: desktopicon and preset_mbe
+Name: "{autodesktop}\{#AppName}"; Filename: "{app}\{#AppExeName}"; IconFilename: "{app}\{#AppExeName}"; Parameters: "--config-dir ""{#ConfigRoot}\MOCVD"""; Tasks: desktopicon and preset_mocvd
+Name: "{autodesktop}\{#AppName}"; Filename: "{app}\{#AppExeName}"; IconFilename: "{app}\{#AppExeName}"; Parameters: "--config-dir ""{#ConfigRoot}\RIE"""; Tasks: desktopicon and preset_rie
 
 [Run]
-Filename: "{app}\{#AppExeName}"; Parameters: "--config-dir ""C:\DISTR\Config\Semistep\MBE"""; Description: "{cm:LaunchProgram,{#AppName}}"; Flags: nowait postinstall skipifsilent; Tasks: preset_mbe
-Filename: "{app}\{#AppExeName}"; Parameters: "--config-dir ""C:\DISTR\Config\Semistep\MOCVD"""; Description: "{cm:LaunchProgram,{#AppName}}"; Flags: nowait postinstall skipifsilent; Tasks: preset_mocvd
-Filename: "{app}\{#AppExeName}"; Parameters: "--config-dir ""C:\DISTR\Config\Semistep\RIE"""; Description: "{cm:LaunchProgram,{#AppName}}"; Flags: nowait postinstall skipifsilent; Tasks: preset_rie
+Filename: "{app}\{#AppExeName}"; Parameters: "--config-dir ""{#ConfigRoot}\MBE"""; Description: "{cm:LaunchProgram,{#AppName}}"; Flags: nowait postinstall skipifsilent; Tasks: preset_mbe
+Filename: "{app}\{#AppExeName}"; Parameters: "--config-dir ""{#ConfigRoot}\MOCVD"""; Description: "{cm:LaunchProgram,{#AppName}}"; Flags: nowait postinstall skipifsilent; Tasks: preset_mocvd
+Filename: "{app}\{#AppExeName}"; Parameters: "--config-dir ""{#ConfigRoot}\RIE"""; Description: "{cm:LaunchProgram,{#AppName}}"; Flags: nowait postinstall skipifsilent; Tasks: preset_rie
diff --git a/SemiStep/Directory.Build.props b/SemiStep/Directory.Build.props
index 05d6295..da298b4 100644
--- a/SemiStep/Directory.Build.props
+++ b/SemiStep/Directory.Build.props
@@ -7,6 +7,12 @@
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <IsPackable>false</IsPackable>
+    <TreatWarningsAsErrors>true</TreatWarningsAsErrors>
+    <!-- NuGet audit results depend on the outside world: a new advisory against a transitive
+         package, or an unreachable audit source (NU1900), must not turn restore red with no
+         commit in the repository. -->
+    <WarningsNotAsErrors>NU1900;NU1901;NU1902;NU1903;NU1904</WarningsNotAsErrors>
+    <EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>
   </PropertyGroup>
 
   <!-- Version: permanent default, overridden at build/publish time via /p:Version=X.Y.Z -->
@@ -14,9 +20,10 @@
     <Version>0.0.0</Version>
   </PropertyGroup>
 
+  <!-- Release builds must ship symbols so crash dumps from installed machines resolve to
+       source lines; pinning DebugType keeps that independent of the SDK default. -->
   <PropertyGroup Condition="'$(Configuration)'=='Release'">
-    <DebugSymbols>False</DebugSymbols>
-    <DebugType>None</DebugType>
+    <DebugType>portable</DebugType>
   </PropertyGroup>
 
   <!-- Publish defaults for win-x64 self-contained deployment.
diff --git a/SemiStep/SemiStep.UI/App.axaml b/SemiStep/SemiStep.UI/App.axaml
index e370151..5f39a65 100644
--- a/SemiStep/SemiStep.UI/App.axaml
+++ b/SemiStep/SemiStep.UI/App.axaml
@@ -6,7 +6,7 @@
     <Application.Resources>
         <ResourceDictionary>
             <ResourceDictionary.MergedDictionaries>
-                <ResourceInclude Source="avares://Semistep/Styles/ColorPalette.axaml" />
+                <ResourceInclude Source="avares://SemiStep/Styles/ColorPalette.axaml" />
             </ResourceDictionary.MergedDictionaries>
 
             <!-- Uniform 4px rounding on interactive controls. Semi's component radius keys alias
@@ -64,8 +64,8 @@
             <Setter Property="MinHeight" Value="26" />
             <Setter Property="Padding" Value="8,3" />
         </Style>
-        <StyleInclude Source="avares://Semistep/Styles/DataGridStyles.axaml" />
-        <StyleInclude Source="avares://Semistep/Styles/Buttons.axaml" />
+        <StyleInclude Source="avares://SemiStep/Styles/DataGridStyles.axaml" />
+        <StyleInclude Source="avares://SemiStep/Styles/Buttons.axaml" />
         <Style Selector="Window">
             <Setter Property="FontFamily" Value="{DynamicResource ChromeFontFamily}" />
             <Setter Property="FontSize" Value="12" />
diff --git a/SemiStep/SemiStep.UI/Assets/Icons/README.md b/SemiStep/SemiStep.UI/Assets/Icons/README.md
index 3cbe378..0dbe9ec 100644
--- a/SemiStep/SemiStep.UI/Assets/Icons/README.md
+++ b/SemiStep/SemiStep.UI/Assets/Icons/README.md
@@ -1,7 +1,7 @@
 # Toolbar icons
 
 256x256 PNG with alpha, referenced from the recipe toolbar as
-`avares://Semistep/Assets/Icons/<name>.png`. The toolbar renders each at 16x16
+`avares://SemiStep/Assets/Icons/<name>.png`. The toolbar renders each at 16x16
 (set in `RecipeToolBar.axaml`), so the larger source just gives crisper Hi-DPI
 downscaling.
 
diff --git a/SemiStep/SemiStep.UI/MainWindow/RecipeToolBar.axaml b/SemiStep/SemiStep.UI/MainWindow/RecipeToolBar.axaml
index b3ac4f7..7bdcfd7 100644
--- a/SemiStep/SemiStep.UI/MainWindow/RecipeToolBar.axaml
+++ b/SemiStep/SemiStep.UI/MainWindow/RecipeToolBar.axaml
@@ -37,7 +37,7 @@
                     Command="{Binding RecipeCommands.AddStepCommand}"
                     ToolTip.Tip="{x:Static l:Resources.ContextAddStep}">
                 <StackPanel Orientation="Horizontal" Spacing="6">
-                    <Image Source="avares://Semistep/Assets/Icons/add.png" />
+                    <Image Source="avares://SemiStep/Assets/Icons/add.png" />
                     <TextBlock Text="{x:Static l:Resources.ToolbarAddStep}" VerticalAlignment="Center" />
                 </StackPanel>
             </Button>
@@ -47,7 +47,7 @@
                     Command="{Binding RecipeCommands.DeleteStepCommand}"
                     ToolTip.Tip="{x:Static l:Resources.ContextDeleteStep}">
                 <StackPanel Orientation="Horizontal" Spacing="6">
-                    <Image Source="avares://Semistep/Assets/Icons/delete.png" />
+                    <Image Source="avares://SemiStep/Assets/Icons/delete.png" />
                     <TextBlock Text="{x:Static l:Resources.ToolbarDeleteStep}" VerticalAlignment="Center" />
                 </StackPanel>
             </Button>
@@ -59,7 +59,7 @@
                     Command="{Binding Clipboard.CopyStepCommand}"
                     ToolTip.Tip="{x:Static l:Resources.ContextCopyStep}">
                 <StackPanel Orientation="Horizontal" Spacing="6">
-                    <Image Source="avares://Semistep/Assets/Icons/copy.png" />
+                    <Image Source="avares://SemiStep/Assets/Icons/copy.png" />
                     <TextBlock Text="{x:Static l:Resources.ToolbarCopyStep}" VerticalAlignment="Center" />
                 </StackPanel>
             </Button>
@@ -69,7 +69,7 @@
                     Command="{Binding Clipboard.CutStepCommand}"
                     ToolTip.Tip="{x:Static l:Resources.ContextCutStep}">
                 <StackPanel Orientation="Horizontal" Spacing="6">
-                    <Image Source="avares://Semistep/Assets/Icons/cut.png" />
+                    <Image Source="avares://SemiStep/Assets/Icons/cut.png" />
                     <TextBlock Text="{x:Static l:Resources.ToolbarCutStep}" VerticalAlignment="Center" />
                 </StackPanel>
             </Button>
@@ -79,7 +79,7 @@
                     Command="{Binding Clipboard.PasteStepCommand}"
                     ToolTip.Tip="{x:Static l:Resources.ContextPasteStep}">
                 <StackPanel Orientation="Horizontal" Spacing="6">
-                    <Image Source="avares://Semistep/Assets/Icons/paste.png" />
+                    <Image Source="avares://SemiStep/Assets/Icons/paste.png" />
                     <TextBlock Text="{x:Static l:Resources.ToolbarPasteStep}" VerticalAlignment="Center" />
                 </StackPanel>
             </Button>
@@ -91,7 +91,7 @@
                     Command="{Binding RecipeCommands.UndoCommand}"
                     ToolTip.Tip="{x:Static l:Resources.ToolbarUndo}">
                 <StackPanel Orientation="Horizontal" Spacing="6">
-                    <Image Source="avares://Semistep/Assets/Icons/undo.png" />
+                    <Image Source="avares://SemiStep/Assets/Icons/undo.png" />
                     <TextBlock Text="{x:Static l:Resources.ToolbarUndo}" VerticalAlignment="Center" />
                 </StackPanel>
             </Button>
@@ -101,7 +101,7 @@
                     Command="{Binding RecipeCommands.RedoCommand}"
                     ToolTip.Tip="{x:Static l:Resources.ToolbarRedo}">
                 <StackPanel Orientation="Horizontal" Spacing="6">
-                    <Image Source="avares://Semistep/Assets/Icons/redo.png" />
+                    <Image Source="avares://SemiStep/Assets/Icons/redo.png" />
                     <TextBlock Text="{x:Static l:Resources.ToolbarRedo}" VerticalAlignment="Center" />
                 </StackPanel>
             </Button>
diff --git a/SemiStep/SemiStep.UI/RecipeGrid/Transposed/TransposedRecipeGridView.axaml b/SemiStep/SemiStep.UI/RecipeGrid/Transposed/TransposedRecipeGridView.axaml
index dbc8ef8..6f9cc78 100644
--- a/SemiStep/SemiStep.UI/RecipeGrid/Transposed/TransposedRecipeGridView.axaml
+++ b/SemiStep/SemiStep.UI/RecipeGrid/Transposed/TransposedRecipeGridView.axaml
@@ -10,7 +10,7 @@
              x:DataType="transposed:TransposedRecipeGridSurface">
 
     <UserControl.Styles>
-        <StyleInclude Source="avares://Semistep/Styles/TransposedGridStyles.axaml" />
+        <StyleInclude Source="avares://SemiStep/Styles/TransposedGridStyles.axaml" />
     </UserControl.Styles>
 
     <Border BorderBrush="{DynamicResource GridBorderBrush}"
diff --git a/SemiStep/SemiStep.UI/SemiStep.UI.csproj b/SemiStep/SemiStep.UI/SemiStep.UI.csproj
index 6e3f18a..15a337d 100644
--- a/SemiStep/SemiStep.UI/SemiStep.UI.csproj
+++ b/SemiStep/SemiStep.UI/SemiStep.UI.csproj
@@ -2,14 +2,12 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <AssemblyName>Semistep</AssemblyName>
+    <AssemblyName>SemiStep</AssemblyName>
     <ApplicationIcon>logo.ico</ApplicationIcon>
   </PropertyGroup>
 
   <ItemGroup>
-    <AssemblyAttribute Include="System.Runtime.CompilerServices.InternalsVisibleTo">
-      <_Parameter1>SemiStep.Tests</_Parameter1>
-    </AssemblyAttribute>
+    <InternalsVisibleTo Include="SemiStep.Tests"/>
   </ItemGroup>
 
   <ItemGroup>
diff --git a/SemiStep/SemiStep.UI/StartupOptions.cs b/SemiStep/SemiStep.UI/StartupOptions.cs
index d051bab..a209e4c 100644
--- a/SemiStep/SemiStep.UI/StartupOptions.cs
+++ b/SemiStep/SemiStep.UI/StartupOptions.cs
@@ -8,10 +8,10 @@ public sealed record StartupOptions(
 	LogEventLevel LoggingLevel)
 {
 	public const string DefaultConfigDir =
-		@"C:\DISTR\Config\Semistep\MBE";
+		@"C:\DISTR\Config\SemiStep\MBE";
 
 	public const string DefaultLogFilePath =
-		@"C:\DISTR\Logs\Semistep\semistep.log";
+		@"C:\DISTR\Logs\SemiStep\semistep.log";
 
 	public const LogEventLevel DefaultLoggingLevel =
 		LogEventLevel.Warning;
diff --git a/SemiStep/SemiStep.UI/Styles/DataGridStyles.axaml b/SemiStep/SemiStep.UI/Styles/DataGridStyles.axaml
index 93cfc20..58c15ca 100644
--- a/SemiStep/SemiStep.UI/Styles/DataGridStyles.axaml
+++ b/SemiStep/SemiStep.UI/Styles/DataGridStyles.axaml
@@ -1,6 +1,6 @@
 <Styles xmlns="https://github.com/avaloniaui"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-        xmlns:rg="clr-namespace:SemiStep.UI.RecipeGrid;assembly=Semistep">
+        xmlns:rg="clr-namespace:SemiStep.UI.RecipeGrid;assembly=SemiStep">
 
     <!-- Base DataGrid styles -->
     <Style Selector="DataGrid">