Add Weekend Outlook generation

docs/internal/briefing.md

@@ -6,7 +6,7 @@ This document describes the implemented briefing package boundary.
 
 `internal/briefing` builds structured report-specific briefing packages from
 forecast summaries and report metadata. The package currently implements Daily
-Today, Daily Tomorrow, and 3-Day Outlook briefing content.
+Today, Daily Tomorrow, 3-Day Outlook, and Weekend Outlook briefing content.
 
 ## Inputs and Outputs
 
@@ -42,6 +42,9 @@ Output:
   character, temperature range, precipitation, wind, risk, outdoor-window, and
   alert inputs, plus broader discussion and weather-story context when
   available.
+- Weekend content uses the same daily outlook summaries and adds planning
+  inputs for best outdoor windows, worst weather windows, rain/storm timing,
+  comfort concerns, and confidence or uncertainty context.
 - Briefing JSON is written atomically by `briefing.Save`.
 
 ## Failure Behavior
@@ -50,6 +53,8 @@ Output:
   daily forecast summary.
 - 3-Day briefing construction requires a 3-Day report definition and at least
   one derived daily summary in the outlook period.
+- Weekend briefing construction requires a Weekend report definition and at
+  least one derived daily summary in the weekend period.
 - Save failures include path and operation context.
 
 ## Tests
@@ -58,6 +63,7 @@ Inspect:
 
 - `internal/briefing/daily_test.go`
 - `internal/briefing/three_day_test.go`
+- `internal/briefing/weekend_test.go`
 - `internal/app/app_test.go`
 - `internal/cli/root_test.go`
 

docs/internal/changes.md

@@ -37,7 +37,7 @@ The app maps these config fields into comparison thresholds:
 
 ## Behavior
 
-Daily and 3-Day comparison currently detect:
+Daily, 3-Day, and Weekend comparison currently detect:
 
 - temperature changes crossing configured thresholds
 - precipitation probability and timing changes
@@ -48,12 +48,15 @@ Daily and 3-Day comparison currently detect:
 When no prior comparable snapshot exists, the app sends an empty Recent Changes
 section in the data package. Daily Today and Daily Tomorrow are compatible for
 same-valid-date comparison through the report registry. 3-Day Outlook compares
-with prior 3-Day Outlook snapshots for the same valid local date.
+with prior 3-Day Outlook snapshots for the same valid local date. Weekend
+Outlook compares with prior Weekend Outlook snapshots for the same weekend
+window.
 
 ## Failure Behavior
 
 Daily comparison requires both inputs to contain Daily briefing content. 3-Day
-comparison requires both inputs to contain 3-Day briefing content.
+comparison requires both inputs to contain 3-Day briefing content. Weekend
+comparison requires both inputs to contain Weekend briefing content.
 
 ## Tests
 
@@ -61,6 +64,7 @@ Inspect:
 
 - `internal/changes/daily_test.go`
 - `internal/changes/three_day_test.go`
+- `internal/changes/weekend_test.go`
 - `internal/app/app_test.go`
 
 ## Invariants

docs/internal/prompt-input.md

@@ -11,7 +11,8 @@ This document describes the implemented prompt input package boundary.
 
 Input:
 
-- `briefing.Package` containing Daily-family or 3-Day Outlook content
+- `briefing.Package` containing Daily-family, 3-Day Outlook, or Weekend Outlook
+  content
 
 Output:
 

docs/internal/state.md

@@ -52,9 +52,10 @@ and report ID. Metadata is stored beside briefing snapshots by report group and
 valid local date. Prior snapshot lookup reads metadata for the same valid local
 date and returns the latest earlier compatible run. Daily Today and Daily
 Tomorrow are compatible with each other; 3-Day Outlook is compatible with prior
-3-Day Outlook snapshots. The store can load a briefing snapshot by path for
-structured comparison. The store prepares the managed Markdown report path
-before `scriptorium run` writes it.
+3-Day Outlook snapshots; Weekend Outlook is compatible with prior Weekend
+Outlook snapshots for the same weekend window. The store can load a briefing
+snapshot by path for structured comparison. The store prepares the managed
+Markdown report path before `scriptorium run` writes it.
 
 ## Failure Behavior