v1.15.5.0

Release 1.15.5.0 (1 Jun 2026) -- compared to 1.15.4.0

• ShadingSystem: Extend per-ShaderGroup complexity statistics: compile-time metrics are now stored as persistent ShaderGroup fields, exposed via getattribute(group, "stat:compiled_active_layers") etc., and getstats() emits a new "Shader compilation stats, post-optimized" section showing min/max/median and a ranked leaderboard for each metric (controlled by the existing "stat:rank_groups" option). Also adds --print-group-stats flag to testshade. #2120 (1.15.5.0, 1.14.11.0)
• fix: When a shader parameter is both interactive and connected, the connection now correctly takes precedence (previously the interactive trait incorrectly overrode it, causing writes into a read-only buffer). Fixed in both single-point and batch modes. #2121 (by Chris Hellmuth) (1.15.5.0, 1.14.11.0)
• ci: Various CI runner fixes: remove deprecated Windows-2025 runner (routes to Windows-2025+VS2026 which we already test) #2114, lock down 2023 container to prevent OCIO build breaks #2117. (1.15.5.0, 1.14.11.0)
• admin: Add AI coding assistant configuration (CLAUDE.md, Cursor, Copilot, Codex, OpenCode support). #2122 (1.15.5.0, 1.14.11.0)