[ai/setup-codex-blueprint 60c1c01] Close approved runtime chunk
 17 files changed, 1604 insertions(+), 826 deletions(-)
 create mode 100644 ai/chunks/completed/chunk-000120-blueprint-runtime-executor-exclusive-side-effect-ownership.md
 create mode 100644 ai/runtime/src/modules/executor/runtime-executor.ts