Why: the Python executor was retired through the shared executor and Phase 5/7 states changed (DM #17/#18 merged, Phase 6 pilot started). Evidence: make test-governance 421 tests OK (SELF, card evidence); git grep finds no live Python executor reference. Impact: task card and master record only. Refs: .task/feature-dev-shared-executor-switch.md; DM PR #17, #18, #19 Co-authored-by: Cursor <cursoragent@cursor.com>