Implement issues (one tick)

One ready-for-agent issue implemented end-to-end per invocation, then stop. Compose with /loop for recurrence (/loop /implement-issues, /loop 1h /implement-issues); /loop owns pacing. Never schedule yourself.

This is the middle leg of the loop pipeline:

process-issues  ->  implement-issues  ->  process-prs
(ready-for-        (non-draft PR,         (review +
 agent issue)       Closes #N)             recommend-* verdict, you merge)

State derives entirely from GitHub (labels, assignees, branches, open PRs), so a tick is idempotent: with no grabbable issue it costs one gh issue list and exits.

Rails