Add temporal pages maintenance reminder to CLAUDE.md

Adds a section reminding to check /now, /then, and /upcoming pages
for needed updates when doing other blog work. These three pages
form a temporal view that should stay in sync with blog content.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CLAUDE.md

@@ -77,6 +77,23 @@ The site has four menu groups configured in `config.toml`:
 - Posts are created with draft status by default (controlled by archetype)
 - The site integrates with multiple social platforms and services in the Kestrel's Nest ecosystem
 
+### Temporal Pages Maintenance
+
+When doing any work on the blog, check if the following pages need updates:
+
+- **`/content/now.md`** - Current activities, projects, reading, playing, upcoming events
+- **`/content/then.md`** - Completed projects, finished books/games, past events
+- **`/content/upcoming.md`** - Future plans, events, projects in the pipeline
+
+These three pages form a temporal view of Eric's life. New blog posts often signal changes that should be reflected here:
+
+- A new project post might mean something moved from `/upcoming` to `/now`
+- A project completion post means moving from `/now` to `/then`
+- Event announcements should appear in `/upcoming` with dates/venues
+- After events pass, move them to `/then`
+
+Each page includes a "last updated" date in the opening paragraph—update this when making changes.
+
 ## Eric's Writing Voice & Style Guide
 
 When writing or editing blog posts, maintain Eric's distinctive voice and structural patterns: