diff --git a/.gitignore b/.gitignore
index 30899a833..a21c12716 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,6 +13,7 @@ __pycache__
 /data/extensions.json
 /data/cache.json
 /data/themes.json
+# /data/installer.json
 config_states
 node_modules
 pnpm-lock.yaml
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 63530e97d..06604ff63 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -60,6 +60,7 @@ TBD
   - refactor: modernize typing and type annotations  
   - refactor: improve `pydantic==2.x` compatibility  
   - refactor: entire logging into separate `modules/logger`  
+  - refactor: replace `timestamp` based startup checks with state caching  
   - update `lint` rules, thanks @awsr  
   - remove requirements: `clip`, `open-clip`  
   - remove `normalbae` pre-processor  
diff --git a/data/installer.json b/data/installer.json
deleted file mode 100644
index 707d95780..000000000
--- a/data/installer.json
+++ /dev/null
@@ -1,21 +0,0 @@
-{
-    "version": {
-        "app": "sd.next",
-        "updated": "unknown",
-        "commit": "unknown",
-        "branch": "unknown",
-        "url": "unknown",
-        "kanvas": "unknown"
-    },
-    "torch": "unknown",
-    "python": "3.14.3 (main, Feb  4 2026, 09:28:29) [GCC 13.3.0]",
-    "platform": "linux",
-    "requirements": "48d1c48d0709cdb9cad3c0da88b582783f02f0ecaf3499c4a81d9e1a1e453c40",
-    "extensions": {
-        "stable-diffusion-webui-rembg": "f3e21bb70e5f8a665b066c5d0ece99bfcff272f3",
-        "sd-extension-chainner": "2a7005fbcf8985644b66121365fa7228a65f34b0",
-        "sd-extension-system-info": "1a35ac4d73ce1f55527f7a95fc61b0915795c21b",
-        "sdnext-kanvas": "79cae1944646e57cfbfb126a971a04e44e45d776",
-        "sdnext-modernui": "fc7cf10dcc3f17377b6a18c4cd0dbd2be5480f0b"
-    }
-}
\ No newline at end of file