Add opus5xover25v15 seed trajectories and documentation

README.md

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 # Shadow Interface Evolution Trajectories
 
-Two archives of OSWorld V2 held-out evaluation trajectories from Shadow Interface Evolution.
+OSWorld V2 evaluation trajectories from Shadow Interface Evolution: two evolved-variant held-out archives and one seed training/validation archive.
 
 | Archive | Evolution experiment | Variant | Trajectories | Full-credit accuracy | Mean partial score |
 | --- | --- | --- | ---: | ---: | ---: |
@@ -20,3 +20,9 @@ Each archive contains only `claude_trajectory.jsonl` files, preserving the origi
 Scores use all 68 held-out tasks as the denominator, counting infrastructure failures as zero. Both runs have infrastructure-imputed zeros for tasks 002, 018, and 024. Trajectory presence does not imply a successful or complete task execution.
 
 The if-006 archive combines the original 33-task batch and the remaining 35-task batch. The if-010 archive is from the crossover experiment (`opus5xover25v15`), evaluated in run `20260906T174130Z`.
+
+## opus5xover25v15 seed
+
+`opus5xover25v15_seed_trajectories.zip` contains 40 `claude_trajectory.jsonl` files from the independently evaluated `opus5xover25v15-seed`, preserving the original task directory structure. It covers 25 training tasks and 15 validation tasks; this is not a held-out 68-task baseline. Separate result and screenshot files are not included.
+
+Across these 40 tasks, full-credit accuracy is 4/40 (10.0%) and mean partial score is 0.3135557204. These scores are from the seed records in `shadow_evolution_osworld_v2_opus5xover25v15.db` and are not directly comparable to the held-out scores above. The recorded run uses Qwen3.8-27B through OpenRouter/novita, a 1M context window, and a two-hour per-task time limit.

opus5xover25v15_seed_trajectories.zip

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