fix(prompts): stop infinite shutdown loop after TeamDelete in non-interactive mode

.claude/skills/setup-agent-team/refactor-issue-prompt.md

@@ -74,7 +74,7 @@ Track lifecycle: "pending-review" → "under-review" → "in-progress". Check la
 7. Keep pushing commits to the same branch as work progresses
 8. When fix is complete and tests pass: `gh pr ready NUMBER`, post update comment linking PR
 9. Do NOT close the issue — `Fixes #SPAWN_ISSUE_PLACEHOLDER` auto-closes on merge
-10. Clean up: `git worktree remove WORKTREE_BASE_PLACEHOLDER`, shutdown teammates
+10. Clean up: run `git worktree remove WORKTREE_BASE_PLACEHOLDER` and call `TeamDelete` in ONE turn, then output a plain-text summary with **NO further tool calls**. A text-only response ends the non-interactive session immediately.
 
 ## Commit Markers
 
@@ -84,5 +84,6 @@ Every commit: `Agent: issue-fixer` + `Co-Authored-By: Claude Sonnet 4.5 <noreply
 
 - Run tests after every change
 - If fix is not straightforward (>10 min), comment on issue explaining complexity and exit
+- **NO TOOLS AFTER TeamDelete.** After calling `TeamDelete`, do NOT call any other tool. Output plain text only to end the session. Any tool call after `TeamDelete` causes an infinite shutdown prompt loop in non-interactive (-p) mode. See issue #3103.
 
 Begin now. Fix issue #SPAWN_ISSUE_PLACEHOLDER.

.claude/skills/setup-agent-team/refactor-team-prompt.md

@@ -273,6 +273,8 @@ Setup: `mkdir -p WORKTREE_BASE_PLACEHOLDER`. Cleanup: `git worktree prune` at cy
 
 **The session ENDS when you produce a response with NO tool calls.** EVERY iteration MUST include at minimum: `TaskList` + `Bash("sleep 15")`.
 
+**EXCEPTION — After TeamDelete:** Once `TeamDelete` has been called and completed (step 4 of the shutdown sequence), your VERY NEXT response MUST be plain text only with **NO tool calls**. Do NOT call `TaskList`, `Bash`, or any other tool after `TeamDelete`. A text-only response is the termination signal for the non-interactive harness. Any tool call after `TeamDelete` causes an infinite loop of shutdown prompt injections.
+
 Keep looping until:
 - All tasks are completed OR
 - Time budget is reached (10 min warn, 12 min shutdown, 15 min force)
@@ -289,11 +291,13 @@ Follow this exact shutdown sequence:
 1. At 10 min: broadcast "wrap up" to all teammates
 2. At 12 min: send `shutdown_request` to EACH teammate by name
 3. Wait for ALL shutdown confirmations — keep calling `TaskList` while waiting
-4. After all confirmations: `git worktree prune && rm -rf WORKTREE_BASE_PLACEHOLDER`
-5. Print summary and exit
+4. In ONE turn: call `TeamDelete`, then run `git worktree prune && rm -rf WORKTREE_BASE_PLACEHOLDER` — do everything in this single turn
+5. **Output a plain-text summary and STOP** — do NOT call any tool after `TeamDelete`. This text-only response ends the session.
 
 **NEVER exit without shutting down all teammates first.** If a teammate doesn't respond to shutdown_request within 2 minutes, send it again.
 
+**CRITICAL — NO TOOLS AFTER TeamDelete.** After `TeamDelete` returns (whether success or "No team name found"), you MUST NOT make any further tool calls. Output your final summary as plain text and stop. Any tool call after `TeamDelete` triggers an infinite shutdown prompt loop in non-interactive (-p) mode. See issue #3103.
+
 ## Safety
 
 - **NEVER close a PR.** No teammate, including team-lead and pr-maintainer, may close any PR — not even PRs created by refactor teammates. Closing PRs is the **security team's responsibility exclusively**. The only exception is if you are immediately opening a superseding PR (state the replacement PR number in the close comment). If a PR is stale, broken, or should not be merged, **leave it open** and comment explaining the issue — the security team will close it during review.