feat(cli): implement loop command (#1571)

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

scripts/loop.sh

@@ -0,0 +1,70 @@
+#!/bin/bash
+# Keeping here for reference, but using the new task-master loop command instead
+set -e
+
+if [ -z "$1" ]; then
+  echo "Usage: $0 <iterations>"
+  exit 1
+fi
+
+# Cold start check - test if sandbox auth is ready
+echo "Checking sandbox auth..."
+test_result=$(docker sandbox run claude -p "Say OK" 2>&1) || true
+
+if [[ "$test_result" == *"OK"* ]]; then
+  echo "✓ Sandbox ready"
+else
+  echo "Sandbox needs authentication. Starting interactive session..."
+  echo "Please complete auth, then ctrl+c to continue."
+  echo ""
+  docker sandbox run claude "cool you're in! you can now exit (ctrl + c) so we can continue the loop"
+  echo ""
+  echo "✓ Auth complete"
+fi
+echo ""
+
+for ((i=1; i<=$1; i++)); do
+  echo ""
+  echo "━━━ Iteration $i of $1 ━━━"
+
+  result=$(docker sandbox run claude -p "@.taskmaster/tasks/tasks.json @.taskmaster/loop-progress.txt @CLAUDE.md \
+SETUP: If task-master command not found, run: npm i -g task-master-ai \
+\
+TASK: Implement ONE task/subtask for the tm loop feature. \
+\
+PROCESS: \
+1. Run task-master next (or use MCP) to get the next available task/subtask. \
+2. Read task details with task-master show <id>. \
+3. Implement following codebase patterns (CLI in apps/cli/src/commands/, core in packages/tm-core/src/modules/). \
+4. Write tests alongside implementation. \
+5. Run npm run turbo:typecheck to verify types. \
+6. Run npm test -w <package> to verify tests pass. \
+7. Mark complete: task-master set-status --id=<id> --status=done \
+8. Commit with message: feat(loop): <what was implemented> (do NOT include loop-progress.txt in commit) \
+9. Append super-concise notes to .taskmaster/loop-progress.txt: task ID, what was done, any learnings. \
+\
+IMPORTANT: \
+- Complete ONLY ONE task per iteration. \
+- Keep changes small and focused. \
+- Do NOT start another task after completing one. \
+- If all tasks are done, output <loop-complete>ALL_DONE</loop-complete>. \
+- If blocked, output <loop-blocked>REASON</loop-blocked>. \
+")
+
+  echo "$result"
+
+  # Strict match - require exact format with content
+  if [[ "$result" =~ \<loop-complete\>ALL_DONE\</loop-complete\> ]]; then
+    echo ""
+    echo "All tasks complete after $i iterations."
+    exit 0
+  fi
+
+  if [[ "$result" =~ \<loop-blocked\>.+\</loop-blocked\> ]]; then
+    echo ""
+    echo "Blocked at iteration $i."
+    exit 1
+  fi
+done
+
+echo "Max iterations ($1) reached."