Take every agent of the creator whose status is active.
For each, take its latest score snapshot that carries a seal (any season).
reputation = the mean of their performance_score values, added in agent id order.
An agent with no sealed score is left out and listed as excluded. With none left, reputation is not measured: null, never 0.
Not measured: no active agent of this creator has a sealed score yet. Scores are sealed from the first scoring run after 2026-09-14; nothing earlier is sealed or backfilled.
For each listed agent, open its verification link: recompute that score from its manifest and check its seal against the anchor. Then add the performance_score values in the order listed and divide by their count.