diff --git a/src/tool_implementations.py b/src/tool_implementations.py
index aa3d17f6b..ed65f4e2d 100644
--- a/src/tool_implementations.py
+++ b/src/tool_implementations.py
@@ -53,6 +53,8 @@ from src.tools.search import do_search_chats  # noqa: F401
 from src.tools.notes import do_manage_notes  # noqa: F401
 # Calendar domain extracted to src/tools/calendar.py (slice 1, #4082/#4071).
 from src.tools.calendar import do_manage_calendar  # noqa: F401
+# Image domain extracted to src/tools/image.py (slice 1, #4082/#4071).
+from src.tools.image import do_edit_image  # noqa: F401
 
 logger = logging.getLogger(__name__)
 
@@ -145,35 +147,6 @@ def _internal_headers(owner: Optional[str] = None) -> Dict[str, str]:
     return headers
 
 
-# ── Gallery tools ──
-
-async def do_edit_image(content: str, owner: Optional[str] = None) -> Dict:
-    """Edit a gallery image (upscale, rembg, inpaint, harmonize)."""
-    import httpx
-    try:
-        args = _parse_tool_args(content)
-    except ValueError:
-        return {"error": "Invalid JSON arguments", "exit_code": 1}
-    image_id = args.get("image_id", "")
-    action = args.get("action", "")
-    if not image_id or not action:
-        return {"error": "image_id and action are required", "exit_code": 1}
-    payload = {"image_id": image_id}
-    if args.get("prompt"):
-        payload["prompt"] = args["prompt"]
-    if args.get("scale"):
-        payload["scale"] = args["scale"]
-    try:
-        async with httpx.AsyncClient(timeout=120) as client:
-            resp = await client.post(f"{_INTERNAL_BASE}/api/gallery/{action}", json=payload)
-            data = resp.json()
-        if data.get("success") or data.get("id"):
-            return {"output": f"Image edited ({action}). New image ID: {data.get('id', '?')}", "exit_code": 0}
-        return {"error": data.get("error", f"{action} failed"), "exit_code": 1}
-    except Exception as e:
-        return {"error": str(e), "exit_code": 1}
-
-
 # ── Research tools ──
 
 async def do_manage_research(content: str, owner: Optional[str] = None) -> Dict:
diff --git a/src/tools/__init__.py b/src/tools/__init__.py
index 217a92af3..ea8bb9881 100644
--- a/src/tools/__init__.py
+++ b/src/tools/__init__.py
@@ -24,3 +24,4 @@ from src.tools.cookbook import (  # noqa: F401
 from src.tools.search import do_search_chats  # noqa: F401
 from src.tools.notes import do_manage_notes  # noqa: F401
 from src.tools.calendar import do_manage_calendar  # noqa: F401
+from src.tools.image import do_edit_image  # noqa: F401
diff --git a/src/tools/image.py b/src/tools/image.py
new file mode 100644
index 000000000..25e879ca2
--- /dev/null
+++ b/src/tools/image.py
@@ -0,0 +1,39 @@
+"""Image-domain tool implementations.
+
+Extracted from tool_implementations.py as part of slice 1 (#4082/#4071).
+Holds the edit_image (gallery) tool.
+``src.tool_implementations`` re-exports these for backward compatibility.
+``_INTERNAL_BASE`` still lives in tool_implementations.py and is pulled back
+function-locally here.
+"""
+from typing import Dict, Optional
+
+from src.tools._common import _parse_tool_args
+
+
+async def do_edit_image(content: str, owner: Optional[str] = None) -> Dict:
+    """Edit a gallery image (upscale, rembg, inpaint, harmonize)."""
+    import httpx
+    from src.tool_implementations import _INTERNAL_BASE  # shared constant, still lives in the facade
+    try:
+        args = _parse_tool_args(content)
+    except ValueError:
+        return {"error": "Invalid JSON arguments", "exit_code": 1}
+    image_id = args.get("image_id", "")
+    action = args.get("action", "")
+    if not image_id or not action:
+        return {"error": "image_id and action are required", "exit_code": 1}
+    payload = {"image_id": image_id}
+    if args.get("prompt"):
+        payload["prompt"] = args["prompt"]
+    if args.get("scale"):
+        payload["scale"] = args["scale"]
+    try:
+        async with httpx.AsyncClient(timeout=120) as client:
+            resp = await client.post(f"{_INTERNAL_BASE}/api/gallery/{action}", json=payload)
+            data = resp.json()
+        if data.get("success") or data.get("id"):
+            return {"output": f"Image edited ({action}). New image ID: {data.get('id', '?')}", "exit_code": 0}
+        return {"error": data.get("error", f"{action} failed"), "exit_code": 1}
+    except Exception as e:
+        return {"error": str(e), "exit_code": 1}