diff --git a/conductor/tracks/consolidate_cruft_and_log_taxonomy_20260228/plan.md b/conductor/tracks/consolidate_cruft_and_log_taxonomy_20260228/plan.md
index 1af7fbd..a36ef06 100644
--- a/conductor/tracks/consolidate_cruft_and_log_taxonomy_20260228/plan.md
+++ b/conductor/tracks/consolidate_cruft_and_log_taxonomy_20260228/plan.md
@@ -13,7 +13,7 @@
 - [x] Task: Conductor - User Manual Verification 'Phase 2: App Logic Redirection' (Protocol in workflow.md) (6326546)
 
 ## Phase 3: Migration Script
-- [ ] Task: Create `scripts/migrate_cruft.ps1` to identify and move existing files (e.g., `temp_*.toml`, `*.log`) from the root to their new locations.
+- [~] Task: Create `scripts/migrate_cruft.ps1` to identify and move existing files (e.g., `temp_*.toml`, `*.log`) from the root to their new locations.
 - [ ] Task: Test the migration script on a few dummy files.
 - [ ] Task: Execute the migration script and verify the project root is clean.
 - [ ] Task: Conductor - User Manual Verification 'Phase 3: Migration Script' (Protocol in workflow.md)
diff --git a/scripts/migrate_cruft.ps1 b/scripts/migrate_cruft.ps1
new file mode 100644
index 0000000..d9a4259
--- /dev/null
+++ b/scripts/migrate_cruft.ps1
@@ -0,0 +1,60 @@
+$projectRoot = Resolve-Path (Join-Path $PSScriptRoot "..")
+$logsDir = Join-Path $projectRoot "logs"
+$sessionsDir = Join-Path $logsDir "sessions"
+$agentsDir = Join-Path $logsDir "agents"
+$errorsDir = Join-Path $logsDir "errors"
+$testsDir = Join-Path $projectRoot "tests"
+$artifactsDir = Join-Path $testsDir "artifacts"
+
+# Ensure target directories exist
+New-Item -ItemType Directory -Force -Path $sessionsDir | Out-Null
+New-Item -ItemType Directory -Force -Path $agentsDir | Out-Null
+New-Item -ItemType Directory -Force -Path $errorsDir | Out-Null
+New-Item -ItemType Directory -Force -Path $artifactsDir | Out-Null
+
+Write-Host "Migrating logs and temporary files to new taxonomy..."
+
+# 1. Move temp files
+Get-ChildItem -Path $projectRoot -Filter "temp_*" -File | ForEach-Object {
+    Write-Host "Moving $($_.Name) to tests/artifacts/"
+    Move-Item -Path $_.FullName -Destination $artifactsDir -Force
+}
+if (Test-Path $testsDir) {
+    Get-ChildItem -Path $testsDir -Filter "temp_*" -File | ForEach-Object {
+        Write-Host "Moving $($_.Name) to tests/artifacts/"
+        Move-Item -Path $_.FullName -Destination $artifactsDir -Force
+    }
+}
+
+# 2. Move MMA logs to logs/agents/
+Get-ChildItem -Path $logsDir -Filter "mma_*.log" -File | ForEach-Object {
+    Write-Host "Moving $($_.Name) to logs/agents/"
+    Move-Item -Path $_.FullName -Destination $agentsDir -Force
+}
+
+# 3. Move error/test logs to logs/errors/
+Get-ChildItem -Path $logsDir -Filter "*.log" -File | Where-Object { $_.Name -like "*test*" -or $_.Name -like "gui_*.log" } | ForEach-Object {
+    Write-Host "Moving $($_.Name) to logs/errors/"
+    Move-Item -Path $_.FullName -Destination $errorsDir -Force
+}
+
+# 4. Move log_registry.toml to logs/sessions/
+if (Test-Path (Join-Path $logsDir "log_registry.toml")) {
+    Write-Host "Moving log_registry.toml to logs/sessions/"
+    Move-Item -Path (Join-Path $logsDir "log_registry.toml") -Destination $sessionsDir -Force
+}
+
+# 5. Move session directories to logs/sessions/
+# Pattern: Starts with 202 (year)
+Get-ChildItem -Path $logsDir -Directory | Where-Object { $_.Name -match "^202\d" } | ForEach-Object {
+    Write-Host "Moving session directory $($_.Name) to logs/sessions/"
+    Move-Item -Path $_.FullName -Destination $sessionsDir -Force
+}
+
+# 6. Move remaining .log files to logs/sessions/
+Get-ChildItem -Path $logsDir -Filter "*.log" -File | ForEach-Object {
+    Write-Host "Moving session log $($_.Name) to logs/sessions/"
+    Move-Item -Path $_.FullName -Destination $sessionsDir -Force
+}
+
+Write-Host "Migration complete."