diff --git a/.claude/settings.local.json b/.claude/settings.local.json
new file mode 100644
index 0000000..93fbf69
--- /dev/null
+++ b/.claude/settings.local.json
@@ -0,0 +1,11 @@
+{
+  "permissions": {
+    "allow": [
+      "WebFetch(domain:antigravity.google)",
+      "Bash(get-childitem:*)",
+      "WebFetch(domain:geminicli.com)",
+      "WebFetch(domain:google-gemini.github.io)",
+      "Bash(Get-ChildItem \"C:\\\\work\\\\claude-meta\\\\home-claude\")"
+    ]
+  }
+}
diff --git a/docs/FRAMEWORK.md b/docs/FRAMEWORK.md
index a5dd98e..c0460f7 100644
--- a/docs/FRAMEWORK.md
+++ b/docs/FRAMEWORK.md
@@ -100,9 +100,57 @@ cd ~/work/claude-meta
 
 Junctions brauchen kein Admin/Developer Mode, funktionieren aber nur auf gleichem Volume.
 
+## Gemini CLI & Antigravity Integration
+
+Beide Tools nutzen `~/.gemini/GEMINI.md` als globale Anweisungsdatei (analog zu CLAUDE.md). `home-claude/rules/` ist die gemeinsame Source of Truth.
+
+### Struktur nach install.ps1 / install.sh
+
+```
+~/.gemini/
+  GEMINI.md          ← COPY von home-gemini/GEMINI.md (kein Symlink, s.u.)
+  settings.json      ← COPY von home-gemini/settings.json (kein Symlink, s.u.)
+  rules/             → Junction/Symlink → home-claude/rules/  (geteilt mit Claude)
+  skills/
+    review/          → Junction/Symlink → home-claude/skills/review/
+    plan-project/    → Junction/Symlink → home-claude/skills/plan-project/
+```
+
+### Was bei welchem Tool ankommt
+
+| | Gemini CLI | Antigravity IDE |
+|---|---|---|
+| Verhaltensregeln (GEMINI.md) | ✓ | ✓ |
+| @rules/* (code-style, dotnet, git) | ✓ | ✓ |
+| memory/ (includeDirectories) | ✓ | ✗ (nicht unterstützt) |
+| Skills (review, plan-project) | ✓ | ✗ (s. Hinweis unten) |
+
+### Warum kein Symlink für GEMINI.md und settings.json
+
+**GEMINI.md:** Gemini CLI verweigert Symlinks aus Sicherheitsgründen (Issue #11547, closed "not planned").
+
+**settings.json:** Gemini CLI überschreibt den Symlink bei jedem automatischen Settings-Update mit einer echten Datei — der Link wird still zerstört (Issue #10960, closed "not planned"). Daher wird auch settings.json immer kopiert. Nach Änderungen an `home-gemini/settings.json` muss `install.ps1` erneut ausgeführt werden.
+
+### Antigravity Skills (TODO)
+
+Antigravity nutzt `~/.gemini/antigravity/skills/` statt `~/.gemini/skills/`. Die Skills aus `home-claude/skills/` sind für Antigravity daher aktuell **nicht** sichtbar. `install.ps1` und `install.sh` könnten um einen Block erweitert werden, der Junctions/Symlinks nach `~/.gemini/antigravity/skills/review/` und `~/.gemini/antigravity/skills/plan-project/` anlegt.
+
+### Regeln nach Änderungen aktualisieren
+
+Regeländerungen in `home-claude/rules/` wirken sofort (Junction/Symlink). Für GEMINI.md und settings.json gilt:
+
+```powershell
+.\scripts\install.ps1   # kopiert GEMINI.md und settings.json neu
+```
+
+Achtung: Antigravity überschreibt `~/.gemini/GEMINI.md` wenn der User über "+ Global" Regeln hinzufügt. In dem Fall `install.ps1` erneut ausführen.
+
 ## Bekannte Einschränkungen
 
 - Claude Code Issue #764: Symlink auf ~/.claude/ Verzeichnis → Dateien unsichtbar
 - Junctions nur auf gleichem Volume (C: → C:)
 - @imports haben max 5 Rekursionstiefe
 - Erste @import-Nutzung braucht einmalige Bestätigung pro Projekt
+- Gemini CLI Issue #11547: GEMINI.md darf kein Symlink sein
+- Gemini CLI Issue #10960: settings.json-Symlink wird bei CLI-Updates zerstört
+- Antigravity und Gemini CLI teilen ~/.gemini/GEMINI.md — Antigravity kann die Datei überschreiben
diff --git a/home-gemini/GEMINI.md b/home-gemini/GEMINI.md
new file mode 100644
index 0000000..2f5fe92
--- /dev/null
+++ b/home-gemini/GEMINI.md
@@ -0,0 +1,5 @@
+Sei extrem prägnant. Opfere Grammatik für Kürze.
+Kommentare und Commit-Messages in Englisch.
+Am Ende jeder Planung: Liste offener Fragen (kurz).
+
+Regeln: @rules/code-style.md @rules/dotnet.md @rules/git.md
diff --git a/home-gemini/settings.json b/home-gemini/settings.json
new file mode 100644
index 0000000..45ffa68
--- /dev/null
+++ b/home-gemini/settings.json
@@ -0,0 +1,6 @@
+{
+  "model": { "name": "gemini-2.5-pro" },
+  "context": {
+    "includeDirectories": ["C:/work/claude-meta/memory"]
+  }
+}
diff --git a/scripts/install.ps1 b/scripts/install.ps1
index 50d875e..2d00258 100644
--- a/scripts/install.ps1
+++ b/scripts/install.ps1
@@ -112,6 +112,125 @@ foreach ($dir in $dirs) {
     }
 }
 
+# ============================================================
+# GEMINI INSTALL
+# ============================================================
+$geminiSourceDir = Join-Path $repoRoot "home-gemini"
+$geminiDir = Join-Path $env:USERPROFILE ".gemini"
+$claudeRulesDir = Join-Path $sourceDir "rules"
+
+Write-Host ""
+Write-Host "Installing Gemini config..." -ForegroundColor Cyan
+Write-Host "  Source: $geminiSourceDir" -ForegroundColor Gray
+Write-Host "  Target: $geminiDir" -ForegroundColor Gray
+Write-Host ""
+
+if (-not (Test-Path $geminiSourceDir)) {
+    Write-Host "  SKIP: home-gemini/ not found" -ForegroundColor Yellow
+} else {
+    # Ensure ~/.gemini/ is a real directory
+    if (Test-Path $geminiDir) {
+        $item = Get-Item $geminiDir -Force
+        if ($item.Attributes -band [System.IO.FileAttributes]::ReparsePoint) {
+            Write-Host "  ERROR: ~/.gemini/ is a symlink/junction. Must be a real directory." -ForegroundColor Red
+            $success = $false
+        }
+    } else {
+        New-Item -ItemType Directory -Path $geminiDir -Force | Out-Null
+        Write-Host "  Created ~/.gemini/" -ForegroundColor Cyan
+    }
+
+    # Check same volume for junctions
+    $geminiVolume = (Get-Item $geminiDir).PSDrive.Name
+    $geminiUseJunctions = ($sourceVolume -eq $geminiVolume)
+
+    # GEMINI.md — always copy (no symlink, Gemini CLI issue #11547)
+    $geminiMdSrc = Join-Path $geminiSourceDir "GEMINI.md"
+    $geminiMdDst = Join-Path $geminiDir "GEMINI.md"
+    if (Test-Path $geminiMdSrc) {
+        Copy-Item $geminiMdSrc $geminiMdDst -Force
+        Write-Host "  COPY: GEMINI.md (symlinks not supported by Gemini CLI)" -ForegroundColor Green
+    }
+
+    # settings.json — try symlink, fallback to copy
+    $settingsSrc = Join-Path $geminiSourceDir "settings.json"
+    $settingsDst = Join-Path $geminiDir "settings.json"
+    if (Test-Path $settingsSrc) {
+        if (Test-Path $settingsDst) { Remove-Item $settingsDst -Force }
+        try {
+            New-Item -ItemType SymbolicLink -Path $settingsDst -Target $settingsSrc -ErrorAction Stop | Out-Null
+            Write-Host "  SYMLINK: settings.json -> $settingsSrc" -ForegroundColor Green
+        } catch {
+            Copy-Item $settingsSrc $settingsDst -Force
+            Write-Host "  COPY: settings.json (symlink failed)" -ForegroundColor Yellow
+            $success = $false
+        }
+    }
+
+    # rules/ — junction to home-claude/rules/ (shared source of truth)
+    $geminiRulesDst = Join-Path $geminiDir "rules"
+    if (Test-Path $claudeRulesDir) {
+        if (Test-Path $geminiRulesDst) {
+            $item = Get-Item $geminiRulesDst -Force
+            if ($item.Attributes -band [System.IO.FileAttributes]::ReparsePoint) {
+                cmd /c "rmdir `"$geminiRulesDst`"" 2>$null
+            } else {
+                Remove-Item $geminiRulesDst -Recurse -Force
+            }
+        }
+        if ($geminiUseJunctions) {
+            cmd /c "mklink /J `"$geminiRulesDst`" `"$claudeRulesDir`"" | Out-Null
+            if ($LASTEXITCODE -eq 0) {
+                Write-Host "  JUNCTION: rules/ -> $claudeRulesDir" -ForegroundColor Green
+            } else {
+                Copy-Item $claudeRulesDir $geminiRulesDst -Recurse -Force
+                Write-Host "  COPY: rules/ (junction failed)" -ForegroundColor Yellow
+                $success = $false
+            }
+        } else {
+            Copy-Item $claudeRulesDir $geminiRulesDst -Recurse -Force
+            Write-Host "  COPY: rules/ (different volume)" -ForegroundColor Yellow
+            $success = $false
+        }
+    }
+
+    # skills/ — selective junctions for review/ and plan-project/
+    $geminiSkillsDir = Join-Path $geminiDir "skills"
+    if (-not (Test-Path $geminiSkillsDir)) {
+        New-Item -ItemType Directory -Path $geminiSkillsDir -Force | Out-Null
+    }
+    foreach ($skill in @("review", "plan-project")) {
+        $skillSrc = Join-Path $sourceDir "skills\$skill"
+        $skillDst = Join-Path $geminiSkillsDir $skill
+        if (-not (Test-Path $skillSrc)) {
+            Write-Host "  SKIP: skills/$skill/ (not in repo)" -ForegroundColor Yellow
+            continue
+        }
+        if (Test-Path $skillDst) {
+            $item = Get-Item $skillDst -Force
+            if ($item.Attributes -band [System.IO.FileAttributes]::ReparsePoint) {
+                cmd /c "rmdir `"$skillDst`"" 2>$null
+            } else {
+                Remove-Item $skillDst -Recurse -Force
+            }
+        }
+        if ($geminiUseJunctions) {
+            cmd /c "mklink /J `"$skillDst`" `"$skillSrc`"" | Out-Null
+            if ($LASTEXITCODE -eq 0) {
+                Write-Host "  JUNCTION: skills/$skill/ -> $skillSrc" -ForegroundColor Green
+            } else {
+                Copy-Item $skillSrc $skillDst -Recurse -Force
+                Write-Host "  COPY: skills/$skill/ (junction failed)" -ForegroundColor Yellow
+                $success = $false
+            }
+        } else {
+            Copy-Item $skillSrc $skillDst -Recurse -Force
+            Write-Host "  COPY: skills/$skill/ (different volume)" -ForegroundColor Yellow
+            $success = $false
+        }
+    }
+}
+
 # --- Validation ---
 Write-Host ""
 Write-Host "Validating..." -ForegroundColor Cyan
@@ -144,6 +263,31 @@ foreach ($dir in $dirs) {
     }
 }
 
+# Gemini validation
+if (Test-Path $geminiSourceDir) {
+    $geminiMdDst = Join-Path $geminiDir "GEMINI.md"
+    if (Test-Path $geminiMdDst) {
+        $item = Get-Item $geminiMdDst -Force
+        if ($item.Attributes -band [System.IO.FileAttributes]::ReparsePoint) {
+            Write-Host "  FAIL: ~/.gemini/GEMINI.md is a symlink (Gemini CLI rejects this!)" -ForegroundColor Red
+            $valid = $false
+        } else {
+            Write-Host "  OK: ~/.gemini/GEMINI.md (real file)" -ForegroundColor Green
+        }
+    } else {
+        Write-Host "  FAIL: ~/.gemini/GEMINI.md not found" -ForegroundColor Red
+        $valid = $false
+    }
+    $geminiRulesDst = Join-Path $geminiDir "rules"
+    if (Test-Path $geminiRulesDst) {
+        $count = (Get-ChildItem $geminiRulesDst -Recurse -File).Count
+        Write-Host "  OK: ~/.gemini/rules/ ($count files)" -ForegroundColor Green
+    } else {
+        Write-Host "  FAIL: ~/.gemini/rules/ not found" -ForegroundColor Red
+        $valid = $false
+    }
+}
+
 # --- Summary ---
 Write-Host ""
 if ($valid) {
diff --git a/scripts/install.sh b/scripts/install.sh
index f0af295..1c00f74 100644
--- a/scripts/install.sh
+++ b/scripts/install.sh
@@ -82,5 +82,84 @@ for dir in skills rules commands; do
     fi
 done
 
+echo ""
+echo "Installing Gemini config..."
+
+GEMINI_SOURCE_DIR="$REPO_ROOT/home-gemini"
+GEMINI_DIR="$HOME/.gemini"
+CLAUDE_RULES_DIR="$SOURCE_DIR/rules"
+
+if [ ! -d "$GEMINI_SOURCE_DIR" ]; then
+    echo "  SKIP: home-gemini/ not found"
+else
+    echo "  Source: $GEMINI_SOURCE_DIR"
+    echo "  Target: $GEMINI_DIR"
+    echo ""
+
+    # Ensure ~/.gemini/ is a real directory
+    if [ -L "$GEMINI_DIR" ]; then
+        echo "  ERROR: ~/.gemini/ is a symlink. Must be a real directory."
+        exit 1
+    fi
+    mkdir -p "$GEMINI_DIR"
+
+    # GEMINI.md — always copy (no symlink, Gemini CLI issue #11547)
+    src="$GEMINI_SOURCE_DIR/GEMINI.md"
+    dst="$GEMINI_DIR/GEMINI.md"
+    if [ -f "$src" ]; then
+        cp -f "$src" "$dst"
+        echo "  COPY: GEMINI.md (symlinks not supported by Gemini CLI)"
+    fi
+
+    # settings.json — symlink
+    src="$GEMINI_SOURCE_DIR/settings.json"
+    dst="$GEMINI_DIR/settings.json"
+    if [ -f "$src" ]; then
+        [ -e "$dst" ] || [ -L "$dst" ] && rm -f "$dst"
+        ln -s "$src" "$dst"
+        echo "  SYMLINK: settings.json -> $src"
+    fi
+
+    # rules/ — symlink to home-claude/rules/ (shared source of truth)
+    dst="$GEMINI_DIR/rules"
+    if [ -d "$CLAUDE_RULES_DIR" ]; then
+        [ -L "$dst" ] && rm "$dst" || { [ -d "$dst" ] && rm -rf "$dst"; }
+        ln -s "$CLAUDE_RULES_DIR" "$dst"
+        echo "  SYMLINK: rules/ -> $CLAUDE_RULES_DIR"
+    fi
+
+    # skills/ — selective symlinks for review/ and plan-project/
+    mkdir -p "$GEMINI_DIR/skills"
+    for skill in review plan-project; do
+        skill_src="$SOURCE_DIR/skills/$skill"
+        skill_dst="$GEMINI_DIR/skills/$skill"
+        if [ ! -d "$skill_src" ]; then
+            echo "  SKIP: skills/$skill/ (not in repo)"
+            continue
+        fi
+        [ -L "$skill_dst" ] && rm "$skill_dst" || { [ -d "$skill_dst" ] && rm -rf "$skill_dst"; }
+        ln -s "$skill_src" "$skill_dst"
+        echo "  SYMLINK: skills/$skill/ -> $skill_src"
+    done
+
+    echo ""
+    echo "Validating Gemini..."
+    dst="$GEMINI_DIR/GEMINI.md"
+    if [ -f "$dst" ] && [ ! -L "$dst" ] && [ -s "$dst" ]; then
+        echo "  OK: ~/.gemini/GEMINI.md (real file)"
+    elif [ -L "$dst" ]; then
+        echo "  FAIL: ~/.gemini/GEMINI.md is a symlink (Gemini CLI rejects this!)"
+    else
+        echo "  FAIL: ~/.gemini/GEMINI.md"
+    fi
+    dst="$GEMINI_DIR/rules"
+    if [ -d "$dst" ]; then
+        count=$(find "$dst" -type f | wc -l)
+        echo "  OK: ~/.gemini/rules/ ($count files)"
+    else
+        echo "  FAIL: ~/.gemini/rules/"
+    fi
+fi
+
 echo ""
 echo "Installation complete!"