Pocock coined the term in an August 15, 2026 tweet after asking Claude Opus 5's /teach skill to explain Buddhism, describing output that kept returning to the word "seam" as a recurring metaphor — technically apt each time, but the repetition itself read as pattern-matched rather than genuinely composed. Unlike generic AI slop, which names low-effort or inaccurate content, seamslop describes writing that is correct and useful, making it harder to fix by asking for more accuracy: what's missing is stylistic variation, not correctness.