implement-issue

Implement GitHub issue #$issue

This run gets one turn

Ending your turn ends the process. There is no later turn to come back to and nothing that can wake you — not a Monitor, not a scheduled wake-up, not a background job you meant to poll, not a subagent whose result you never awaited. Whatever the worktree holds the moment you stop is all the run leaves behind: uncommitted edits, an unpushed branch, no PR. To the supervisor that is indistinguishable from a run that produced nothing, so a perfectly good issue gets parked. Interactively every one of those waits works, which is exactly why this needs saying.

So anything whose result you need is waited for inside this turn, however long it takes. Never end a turn intending to resume. A measurement worth taking is worth blocking on; one not worth blocking on should be dropped rather than deferred.

Waiting is not the same as going quiet, though. A supervisor kills and resumes a run that emits nothing for -stall — fifteen minutes by default — so a wait longer than that is polled from here, in repeated calls that keep the run visibly alive, rather than spent inside one call a watchdog cannot tell from a hang. Poll it slowly — a check every minute or two. Each check is a fresh turn that reloads the whole late-session context, so polling faster costs a lot and buys nothing. Backgrounding the slow thing is fine; what is not is the turn ending while it is still outstanding.

Polling is only for work still running when you look. A Skill call that hasn't returned yet needs none: the harness holds the turn until it returns, so a ListAgents or Bash: true heartbeat beside it is waste. But a return is not proof the work behind it is done, however finished its prose reads — the skill may still have subagents running in the background. So before trusting a Skill call's result, check ListAgents: nothing related still running means done; anything still running is backgrounded work, polled slowly as above. Phase 3 step 2c says how the review gate checkpoints what arrives while it waits.