chore: switch from develop/dev to main/latest image tags (#434)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

docs/AGENTS.md

@@ -29,12 +29,12 @@ Context = tokens = cost. Be smart.
 2. Code      → TDD: write test (RED), implement (GREEN), refactor
 3. Test      → pnpm test (must pass)
 4. Push      → git push origin feature/XX-description
-5. PR        → Create PR to develop (not main)
+5. PR        → Create PR to main
 6. Review    → Wait for approval or self-merge if authorized
 7. Close     → Close related issues via API
 ```
 
-**Never merge directly to develop without a PR.**
+**Never merge directly to main without a PR.**
 
 ### Issue Management
 
@@ -53,7 +53,7 @@ curl -s -X PATCH -H "Authorization: token $TOKEN" -H "Content-Type: application/
   -d '{"state":"closed"}'
 
 # Create PR (tea CLI works for this)
-tea pulls create --repo mosaic/stack --base develop --head feature/XX-name \
+tea pulls create --repo mosaic/stack --base main --head feature/XX-name \
   --title "feat(#XX): Title" --description "Description"
 ```