Plan

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diff --git a/developer-weekend/dec-2019.mdwn b/developer-weekend/dec-2019.mdwn
index 4b09b14..0d9f7db 100644
--- a/developer-weekend/dec-2019.mdwn
+++ b/developer-weekend/dec-2019.mdwn
@@ -129,6 +129,36 @@ Vince
 * Finished extended internet test badgering including full reorganisation of
   the monkey-tests tree.
 
+Plan for page info
+==================
+
+1. We add to browser_window the concept of the currently displayed page info.
+2. That info is an enumeration of:
+    * UNKNOWN (nothing loaded?)
+    * INTERNAL (e.g. `about:` etc)
+    * INSECURE (e.g. `http://`)
+    * SECURE+PROBLEMS (e.g. `https://` but `http://` images, or badssl)
+    * SECURE (all is well)
+3. Whenever the currently displayed page changes, `browser_window` will send a
+   notification to the GUI, which will then be able to retrieve the current
+   state information.
+4. More detailed page information will be available through further APIs
+
+Then separately
+
+When the page information button is clicked, the GUI pops up a corewindow for
+it.  This window will show information about the page's security, etc.  Most of
+the information for this can be directly retrieved from the browser_window and
+as such, the corewindow will be initialised with the browser_window pointer.
+The GUI will be responsible for destroying the corewindow when the browser
+window is going away, and for notifying the corewindow when the browser window
+event indicating info-change occurs.
+
+This means that the corewindow is borrowing from the browser window, so we need
+to ensure that anything the browser window returns by pointer will remain safe
+for use even when navigation events occur.
+
+
 
 Statement of work
 =================