Stopped: the branch check at the top of the task failed. `git branch --show-current`
printed `master`, not the required `m5d2`, and no `m5d2` branch exists locally.
Per the task's stop condition and the instruction to never switch branches, work
did not begin. This commit records only the stopped row in the implementer log.
Co-Authored-By: ornith-1.5-35b-a3b <agent@wntrmute.dev>