Rewrite central package versions and version properties in .props files in fallout-migrate

.agents/skills/adding-a-migration-step/SKILL.md

@@ -6,12 +6,12 @@ description: How to make fallout-migrate handle a new rename, removal, or rewrit
 `fallout-migrate` runs a fixed, ordered list of `IMigrationStep` implementations,
 built in `src/Fallout.Migrate/Migration.cs`. A **step is one operation over one
 set of files**, and it owns the rewrite rules for those files.
-`RewriteCsprojsStep` holds the rules for `*.csproj`; `RewriteCsFilesStep` holds
+`RewriteCsprojsStep` holds the rules for `*.csproj` and `*.props`; `RewriteCsFilesStep` holds
 the rules for `*.cs`.
 
 ## Adding a new rename, removal, or rewrite
 
-1. Find the step for that file type — `RewriteCsprojsStep` for `*.csproj`,
+1. Find the step for that file type — `RewriteCsprojsStep` for `*.csproj` and `*.props`,
    `RewriteCsFilesStep` for `*.cs`, `RewriteBootstrapScriptsStep` for the
    bootstrap scripts.
 2. Add a `private static readonly Regex` field to that step, with a comment

docs/Migration/from-nuke.md

@@ -15,7 +15,7 @@ Done. Read on if anything looks unusual, or you want to know what the tool did.
 
 ## The recommended path: `fallout-migrate`
 
-`fallout-migrate` is a global `dotnet` tool that performs the entire migration in one command. It rewrites `PackageReference`s, `using` directives, MSBuild properties, bootstrap scripts, env vars, and renames `.nuke/` → `.fallout/`. It's idempotent and has a `--dry-run` mode.
+`fallout-migrate` is a global `dotnet` tool that performs the entire migration in one command. It rewrites `PackageReference`s and central package versions (`Directory.Packages.props`), `using` directives, MSBuild properties, bootstrap scripts, env vars, and renames `.nuke/` → `.fallout/`. It's idempotent and has a `--dry-run` mode.
 
 ### Step 1 — install the tool
 

src/Fallout.Migrate/Common/MigrationFileOperations.cs

@@ -50,7 +50,7 @@ public static void ApplyRewrite(
         {
             original = path.ReadAllText();
         }
-        catch (IOException ex)
+        catch (Exception ex) when (ex is IOException or UnauthorizedAccessException)
         {
             summary.Warnings.Add($"could not read {RelativePath(context.RootDirectory, path)}: {ex.Message}");
             return;