diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index cdc1b52..749f0b9 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -6,6 +6,7 @@
       {
         "id": "4401c2028975be2d",
         "type": "tabs",
+        "dimension": 84.22712933753942,
         "children": [
           {
             "id": "0291e64e72ae27cb",
@@ -197,6 +198,7 @@
       {
         "id": "eec95490d79df958",
         "type": "tabs",
+        "dimension": 15.772870662460567,
         "children": [
           {
             "id": "a08a485a4ac0f8d8",
@@ -284,7 +286,7 @@
       }
     ],
     "direction": "horizontal",
-    "width": 267.50390243530273
+    "width": 200
   },
   "right": {
     "id": "1017d1cf4a473028",
@@ -454,7 +456,8 @@
       }
     ],
     "direction": "horizontal",
-    "width": 261.5
+    "width": 261.5,
+    "collapsed": true
   },
   "left-ribbon": {
     "hiddenItems": {
diff --git a/Temporary/Webapp - Chirp Log Review.md b/Temporary/Webapp - Chirp Log Review.md
index e5334f9..6da2cb1 100644
--- a/Temporary/Webapp - Chirp Log Review.md	
+++ b/Temporary/Webapp - Chirp Log Review.md	
@@ -7,6 +7,52 @@ tags:
 ---
 # Webapp - Chirp Log Review
 
+## Architecture
+
+```mermaid
+flowchart TD
+  %% Clusters
+  subgraph Client
+    C1[Request upload URL]
+    C2[Upload file via signed URL]
+    C3[Request download URL]
+    C4[Download file]
+  end
+
+  subgraph Flask
+    F1[Generate signed upload URL]
+    F2[Insert file metadata into Postgres]
+    F3[Generate signed download URL]
+  end
+
+  subgraph S3
+    S1[Object: flight123.chirp]
+  end
+
+  subgraph Postgres
+    D1[(files table)]
+    D2[(log_meta table)]
+    D3[(log_timeseries table)]
+  end
+
+  %% Upload flow
+  C1 -->|ask upload| F1
+  F1 -->|return signed URL| C1
+  C2 -->|PUT file| S3
+  S3 -->|ack upload| C2
+  F2 --> D1
+
+  %% Download flow
+  C3 -->|ask download| F3
+  F3 -->|return signed URL| C3
+  C4 -->|GET file| S3
+
+  %% DB relations
+  D1 --> D2
+  D2 --> D3
+```
+
+
 ## Feature Implementation Plan