diff --git a/AGENTS.md b/AGENTS.md
new file mode 100644
index 0000000..1aaa2e8
--- /dev/null
+++ b/AGENTS.md
@@ -0,0 +1,63 @@
+# AGENTS.md
+
+## Purpose
+This file defines the default working agreement for AI coding agents and contributors in this repository.
+
+## Documentation Language
+Project language is English. All documentation, issues, pull requests, commit messages, and code comments should be written in English.
+All newly created documentation in this project must be written in English.
+All project documentation files must be stored under `docs/`, except `README.md` and `AGENTS.md`.
+
+## Working Principles
+1. Keep changes minimal and focused on the requested task.
+2. Preserve existing public APIs unless a breaking change is explicitly requested.
+3. Prefer clear, maintainable code over clever shortcuts.
+4. Do not modify unrelated files.
+5. Never add secrets, credentials, or tokens to the repository.
+
+## Testing Expectations
+1. Add or update tests for behavior changes.
+2. Keep tests deterministic and fast.
+3. Prefer table-driven tests where they improve readability.
+4. Run relevant tests locally before finishing changes.
+
+## Definition of Done (DoD)
+
+### Purpose
+The Definition of Done defines the minimum quality bar for every completed change in this repository.
+
+### Mandatory Criteria
+1. Tests
+- Every code change is covered by tests where applicable.
+- New functionality includes new tests.
+- Bug fixes include at least one regression test.
+
+1. Functional documentation
+- Implemented functionality is documented.
+- Public API-relevant changes are reflected in README and/or docs.
+
+1. Documentation standards
+- Documentation is written in English.
+- Documentation files are placed under `docs/`.
+- Exceptions: `README.md` and `AGENTS.md` remain at repository root.
+
+### Technical Completion Criteria
+1. Build and test status
+- The project builds successfully.
+- Relevant test commands run successfully.
+
+1. No unresolved critical issues
+- No new blocking errors are introduced.
+- Known non-blocking warnings are acceptable only if unrelated to the change or documented.
+
+1. Documentation structure
+- Links to moved or newly added docs are valid.
+- Documentation structure remains consistent with project rules.
+
+### Review Checklist (Quick)
+- [ ] Change is implemented and meets acceptance criteria.
+- [ ] Tests were added/updated and pass.
+- [ ] Functionality is documented.
+- [ ] Documentation is in English.
+- [ ] Documentation is located under `docs/` (except `README.md` and `AGENTS.md`).
+- [ ] No critical regressions found.
diff --git a/docs/DEFINITION_OF_DONE.md b/docs/DEFINITION_OF_DONE.md
new file mode 100644
index 0000000..c254e82
--- /dev/null
+++ b/docs/DEFINITION_OF_DONE.md
@@ -0,0 +1,44 @@
+# Definition of Done (DoD)
+
+## Purpose
+
+This Definition of Done defines the minimum quality bar for every completed change in this repository.
+
+## Mandatory Criteria
+
+1. Tests
+- Every code change is covered by tests where applicable.
+- New functionality includes new tests.
+- Bug fixes include at least one regression test.
+
+1. Functional documentation
+- Implemented functionality is documented.
+- Public API-relevant changes are reflected in README and/or docs.
+
+1. Documentation standards
+- Documentation is written in English.
+- Documentation files are placed under `docs/`.
+- Exceptions: `README.md` and `AGENTS.md` remain at repository root.
+
+## Technical Completion Criteria
+
+1. Build and test status
+- The project builds successfully.
+- Relevant test commands run successfully.
+
+1. No unresolved critical issues
+- No new blocking errors are introduced.
+- Known non-blocking warnings are acceptable only if unrelated to the change or documented.
+
+1. Documentation links and structure
+- Links to moved or newly added docs are valid.
+- Documentation structure remains consistent with project rules.
+
+## Review Checklist (Quick)
+
+- [ ] Change is implemented and meets acceptance criteria.
+- [ ] Tests were added/updated and pass.
+- [ ] Functionality is documented.
+- [ ] Documentation is in English.
+- [ ] Documentation is located under `docs/` (except `README.md` and `AGENTS.md`).
+- [ ] No critical regressions found.
diff --git a/scripts/Reconcile-ProjectStandards.ps1 b/scripts/Reconcile-ProjectStandards.ps1
new file mode 100644
index 0000000..63ee8f9
--- /dev/null
+++ b/scripts/Reconcile-ProjectStandards.ps1
@@ -0,0 +1,121 @@
+[CmdletBinding()]
+param(
+    [string]$RootPath = "C:\Users\stefan\git",
+    [string]$StandardsRepoPath = "C:\Users\stefan\git\project-standards",
+    [string[]]$Exclude = @('project-standards'),
+    [switch]$CheckOnly,
+    [switch]$Watch,
+    [int]$IntervalSeconds = 60
+)
+
+Set-StrictMode -Version Latest
+$ErrorActionPreference = 'Stop'
+
+$agentsTemplate = Join-Path $StandardsRepoPath 'templates/AGENTS.base.md'
+$dodTemplate = Join-Path $StandardsRepoPath 'templates/DEFINITION_OF_DONE.base.md'
+
+if (-not (Test-Path -Path $agentsTemplate -PathType Leaf)) {
+    throw "AGENTS template not found: $agentsTemplate"
+}
+
+if (-not (Test-Path -Path $dodTemplate -PathType Leaf)) {
+    throw "DoD template not found: $dodTemplate"
+}
+
+if ($IntervalSeconds -lt 5) {
+    throw 'IntervalSeconds must be >= 5.'
+}
+
+function Get-ContentHashOrMissing {
+    param([string]$Path)
+
+    if (-not (Test-Path -Path $Path -PathType Leaf)) {
+        return '__MISSING__'
+    }
+
+    return (Get-FileHash -Path $Path -Algorithm SHA256).Hash
+}
+
+function Ensure-FileFromTemplate {
+    param(
+        [string]$Template,
+        [string]$Target,
+        [switch]$OnlyCheck
+    )
+
+    $templateHash = Get-ContentHashOrMissing -Path $Template
+    $targetHash = Get-ContentHashOrMissing -Path $Target
+
+    if ($templateHash -eq $targetHash) {
+        return 'ok'
+    }
+
+    if ($OnlyCheck) {
+        return 'drift'
+    }
+
+    $parent = Split-Path -Parent $Target
+    if (-not (Test-Path -Path $parent -PathType Container)) {
+        New-Item -ItemType Directory -Path $parent | Out-Null
+    }
+
+    Copy-Item -Path $Template -Destination $Target -Force
+    return 'updated'
+}
+
+function Invoke-ReconcileOnce {
+    param([switch]$OnlyCheck)
+
+    $resolvedRoot = (Resolve-Path -Path $RootPath -ErrorAction Stop).Path
+    $repos = Get-ChildItem -Path $resolvedRoot -Directory | Where-Object {
+        $Exclude -notcontains $_.Name
+    }
+
+    $summary = [ordered]@{
+        scanned = 0
+        updated = 0
+        drift = 0
+    }
+
+    foreach ($repo in $repos) {
+        $repoPath = $repo.FullName
+        $agentsTarget = Join-Path $repoPath 'AGENTS.md'
+        $dodTarget = Join-Path (Join-Path $repoPath 'docs') 'DEFINITION_OF_DONE.md'
+
+        $summary.scanned++
+
+        $agentsState = Ensure-FileFromTemplate -Template $agentsTemplate -Target $agentsTarget -OnlyCheck:$OnlyCheck
+        $dodState = Ensure-FileFromTemplate -Template $dodTemplate -Target $dodTarget -OnlyCheck:$OnlyCheck
+
+        if ($agentsState -eq 'updated' -or $dodState -eq 'updated') {
+            $summary.updated++
+            Write-Host "UPDATED: $repoPath"
+            continue
+        }
+
+        if ($agentsState -eq 'drift' -or $dodState -eq 'drift') {
+            $summary.drift++
+            Write-Host "DRIFT:   $repoPath"
+            continue
+        }
+
+        Write-Host "OK:      $repoPath"
+    }
+
+    Write-Host "Summary -> scanned=$($summary.scanned), updated=$($summary.updated), drift=$($summary.drift)"
+    return $summary
+}
+
+if ($Watch) {
+    while ($true) {
+        $now = Get-Date -Format 'yyyy-MM-dd HH:mm:ss'
+        Write-Host "[$now] Reconciling project standards..."
+        [void](Invoke-ReconcileOnce -OnlyCheck:$CheckOnly)
+        Start-Sleep -Seconds $IntervalSeconds
+    }
+}
+
+$result = Invoke-ReconcileOnce -OnlyCheck:$CheckOnly
+if ($CheckOnly -and $result.drift -gt 0) {
+    exit 1
+}
diff --git a/scripts/reconcile-project-standards.sh b/scripts/reconcile-project-standards.sh
new file mode 100644
index 0000000..0d280e6
--- /dev/null
+++ b/scripts/reconcile-project-standards.sh
@@ -0,0 +1,170 @@
+#!/usr/bin/env sh
+set -eu
+
+ROOT_PATH="/c/Users/stefan/git"
+STANDARDS_REPO="/c/Users/stefan/git/project-standards"
+EXCLUDE_NAME="project-standards"
+CHECK_ONLY=0
+WATCH=0
+INTERVAL=60
+
+usage() {
+  cat <<'EOF'
+Usage:
+  reconcile-project-standards.sh [options]
+
+Options:
+  --root <path>           Root folder containing repositories
+  --standards-repo <path> Path to project-standards repository
+  --exclude <name>        First-level directory name to skip (default: project-standards)
+  --check-only            Check drift only, do not update files
+  --watch                 Continuously scan and reconcile
+  --interval <seconds>    Watch interval in seconds (default: 60)
+  -h, --help              Show this help
+EOF
+}
+
+while [ "$#" -gt 0 ]; do
+  case "$1" in
+    --root)
+      ROOT_PATH=$2
+      shift 2
+      ;;
+    --standards-repo)
+      STANDARDS_REPO=$2
+      shift 2
+      ;;
+    --exclude)
+      EXCLUDE_NAME=$2
+      shift 2
+      ;;
+    --check-only)
+      CHECK_ONLY=1
+      shift
+      ;;
+    --watch)
+      WATCH=1
+      shift
+      ;;
+    --interval)
+      INTERVAL=$2
+      shift 2
+      ;;
+    -h|--help)
+      usage
+      exit 0
+      ;;
+    *)
+      echo "Unknown option: $1" >&2
+      usage >&2
+      exit 1
+      ;;
+  esac
+done
+
+if [ "$INTERVAL" -lt 5 ]; then
+  echo "interval must be >= 5" >&2
+  exit 1
+fi
+
+AGENTS_TEMPLATE="$STANDARDS_REPO/templates/AGENTS.base.md"
+DOD_TEMPLATE="$STANDARDS_REPO/templates/DEFINITION_OF_DONE.base.md"
+
+if [ ! -f "$AGENTS_TEMPLATE" ]; then
+  echo "AGENTS template not found: $AGENTS_TEMPLATE" >&2
+  exit 1
+fi
+
+if [ ! -f "$DOD_TEMPLATE" ]; then
+  echo "DoD template not found: $DOD_TEMPLATE" >&2
+  exit 1
+fi
+
+hash_or_missing() {
+  path=$1
+  if [ ! -f "$path" ]; then
+    printf "%s" "__MISSING__"
+    return 0
+  fi
+
+  if command -v sha256sum >/dev/null 2>&1; then
+    sha256sum "$path" | awk '{print $1}'
+  else
+    shasum -a 256 "$path" | awk '{print $1}'
+  fi
+}
+
+ensure_file() {
+  template=$1
+  target=$2
+
+  template_hash=$(hash_or_missing "$template")
+  target_hash=$(hash_or_missing "$target")
+
+  if [ "$template_hash" = "$target_hash" ]; then
+    printf "%s" "ok"
+    return 0
+  fi
+
+  if [ "$CHECK_ONLY" -eq 1 ]; then
+    printf "%s" "drift"
+    return 0
+  fi
+
+  mkdir -p "$(dirname "$target")"
+  cp "$template" "$target"
+  printf "%s" "updated"
+}
+
+run_once() {
+  scanned=0
+  updated=0
+  drift=0
+
+  for repo in "$ROOT_PATH"/*; do
+    [ -d "$repo" ] || continue
+
+    name=$(basename "$repo")
+    [ "$name" = "$EXCLUDE_NAME" ] && continue
+
+    scanned=$((scanned + 1))
+
+    agents_target="$repo/AGENTS.md"
+    dod_target="$repo/docs/DEFINITION_OF_DONE.md"
+
+    agents_state=$(ensure_file "$AGENTS_TEMPLATE" "$agents_target")
+    dod_state=$(ensure_file "$DOD_TEMPLATE" "$dod_target")
+
+    if [ "$agents_state" = "updated" ] || [ "$dod_state" = "updated" ]; then
+      updated=$((updated + 1))
+      echo "UPDATED: $repo"
+      continue
+    fi
+
+    if [ "$agents_state" = "drift" ] || [ "$dod_state" = "drift" ]; then
+      drift=$((drift + 1))
+      echo "DRIFT:   $repo"
+      continue
+    fi
+
+    echo "OK:      $repo"
+  done
+
+  echo "Summary -> scanned=$scanned, updated=$updated, drift=$drift"
+
+  if [ "$CHECK_ONLY" -eq 1 ] && [ "$drift" -gt 0 ]; then
+    return 1
+  fi
+
+  return 0
+}
+
+if [ "$WATCH" -eq 1 ]; then
+  while :; do
+    echo "[$(date '+%Y-%m-%d %H:%M:%S')] Reconciling project standards..."
+    run_once || true
+    sleep "$INTERVAL"
+  done
+else
+  run_once
+fi
diff --git a/utils_test.go b/utils_test.go
index 5003eea..05960f3 100644
--- a/utils_test.go
+++ b/utils_test.go
@@ -1,7 +1,6 @@
 package util
 
 import (
-	"fmt"
 	"os"
 	"os/user"
 	"path/filepath"
@@ -67,7 +66,7 @@ func TestIsSuperUser(t *testing.T) {
 
 func TestGlobalConfigurationDirectoryWindows(t *testing.T) {
 	if runtime.GOOS != "windows" {
-		t.Skip(fmt.Sprintf("Skipping on OS %s", runtime.GOOS))
+		t.Skipf("Skipping on OS %s", runtime.GOOS)
 	}
 	appFolder := GetGlobalConfigurationDirectory("myapp")
 	assert.Equal(t, filepath.Join(os.Getenv("APPDATA"), "myapp"), appFolder)
@@ -75,7 +74,7 @@ func TestGlobalConfigurationDirectoryWindows(t *testing.T) {
 
 func TestGlobalConfigurationDirectoryLinux(t *testing.T) {
 	if runtime.GOOS != "linux" {
-		t.Skip(fmt.Sprintf("Skipping on OS %s", runtime.GOOS))
+		t.Skipf("Skipping on OS %s", runtime.GOOS)
 	}
 	appFolder := GetGlobalConfigurationDirectory("myapp")
 	assert.Equal(t, "/etc/myapp", appFolder)
@@ -83,8 +82,17 @@ func TestGlobalConfigurationDirectoryLinux(t *testing.T) {
 
 func TestGlobalConfigurationDirectoryMacOS(t *testing.T) {
 	if runtime.GOOS != "darwin" {
-		t.Skip(fmt.Sprintf("Skipping on OS %s", runtime.GOOS))
+		t.Skipf("Skipping on OS %s", runtime.GOOS)
 	}
 	appFolder := GetGlobalConfigurationDirectory("myapp")
 	assert.Equal(t, "/etc/myapp", appFolder)
 }
+
+func TestMkDir(t *testing.T) {
+	path := "c:/tmp/bla/blub"
+	if !FileExists(path) {
+		err := os.MkdirAll(path, os.ModeDir)
+		assert.Nil(t, err)
+		assert.True(t, FileExists(path))
+	}
+}