Knowledge cache + Florence timestamp-gate

florence.agent.md:
- Tilfoej Step 0: timestamp-gate
  Laes ~/.claude/.florence-timestamp — spring runden over
  hvis under 30 minutter gammel. Skriv timestamp efter runde.
  Forhindrer Florence i at kore ved hver session-aabning.

curabis-standard.agent.md:
- CLAUDE.md-template: erstat 24 URL-fetches med local cache-laesning
  fra ~/.claude/bcquality-knowledge/ (architecture/ testing/ mcp/)
  Session-start reduceres fra ~25 netvaerkskald til 0.

Global ~/.claude/CLAUDE.md opdateret separat:
- Auto-update downloader nu knowledge-filer til cache ved SHA-aendring
- Session-start laeder fra cache, ikke fra URLs
- Florence korer kun hvis >= 30 min siden sidst

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

custom/agents/florence.agent.md

@@ -58,6 +58,26 @@ improvise the checklist — she follows it exactly, and flags if it is outdated.
 
 ## Round protocol
 
+### Step 0 — Timestamp gate
+
+Before doing anything, check `~/.claude/.florence-timestamp`:
+
+```
+$ts = Get-Content ~/.claude/.florence-timestamp -ErrorAction SilentlyContinue
+$age = if ($ts) { ((Get-Date) - [datetime]$ts).TotalMinutes } else { 999 }
+```
+
+- If `$age < 30`: skip the round entirely. Silence is the report.
+- If `$age >= 30` (or file missing): proceed to Step 1.
+
+After completing Step 4 (report), always write the current timestamp:
+```
+(Get-Date -Format "o") | Set-Content ~/.claude/.florence-timestamp
+```
+
+This prevents Florence from running more than once per 30 minutes,
+regardless of how many sessions are opened.
+
 ### Step 1 — Read the checklist
 Open HEARTBEAT.md. Note the last round timestamp. Proceed item by item.