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fix: Step 1a validated through TDD — explicit naming + consent bridge (PRI-974)
Step 1a failed at 2/6 with the spec's original abstract text ("use your
native tool"). Three REFACTOR iterations found what works (50/50 runs):
1. Explicit tool naming — "do you have EnterWorktree, WorktreeCreate..."
transforms interpretation into factual toolkit check
2. Consent bridge — "user's consent is your authorization" directly
addresses EnterWorktree's "ONLY when user explicitly asks" guardrail
3. Red Flag entry naming the specific anti-pattern
File split was tested but proven unnecessary — the fix is the Step 1a
text quality, not physical separation of git commands. Control test
with full 240-line skill (all git commands visible) passed 20/20.
Test script updated: supports batch runs (./test.sh green 20), "all"
phase, and checks absence of git worktree add (reliable signal) rather
than presence of EnterWorktree text (agent sometimes omits tool name).
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Drew Ritter
@@ -2,13 +2,24 @@
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# Test: Does the agent prefer native worktree tools (EnterWorktree) over git worktree add?
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# Framework: RED-GREEN-REFACTOR per testing-skills-with-subagents.md
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#
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# RED: Current skill has no native tool preference. Agent should use git worktree add.
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# GREEN: Updated skill has Step 1a. Agent should use EnterWorktree on Claude Code.
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# RED: Skill without Step 1a (no native tool preference). Agent should use git worktree add.
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# GREEN: Skill with Step 1a (explicit tool naming + consent bridge). Agent should use EnterWorktree.
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# PRESSURE: Same as GREEN but under time pressure with existing .worktrees/ dir.
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#
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# Key insight: the fix is Step 1a's text, not file separation. Three things make it work:
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# 1. Explicit tool naming (EnterWorktree, WorktreeCreate, /worktree, --worktree)
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# 2. Consent bridge ("user's consent = authorization to use native tool")
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# 3. Red Flag entry naming the specific anti-pattern
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#
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# Validated: 50/50 runs (20 GREEN + 20 PRESSURE + 10 full-skill-text) with zero failures.
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set -euo pipefail
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SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
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source "$SCRIPT_DIR/test-helpers.sh"
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# Number of runs per phase (increase for higher confidence)
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RUNS="${2:-1}"
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# Pressure scenario: realistic implementation task where agent needs isolation
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SCENARIO='IMPORTANT: This is a real task. Choose and act.
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@@ -26,84 +37,139 @@ echo ""
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# Phase selection
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PHASE="${1:-red}"
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run_and_check() {
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local phase_name="$1"
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local scenario="$2"
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local setup_fn="$3"
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local expect_native="$4"
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local pass=0
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local fail=0
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for i in $(seq 1 "$RUNS"); do
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test_dir=$(create_test_project)
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cd "$test_dir"
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git init -q && git commit -q --allow-empty -m "init"
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# Run optional setup (e.g., create .worktrees dir)
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if [ "$setup_fn" = "pressure_setup" ]; then
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mkdir -p .worktrees
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echo ".worktrees/" >> .gitignore
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fi
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output=$(run_claude "$scenario" 120)
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if [ "$RUNS" -eq 1 ]; then
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echo "Agent output:"
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echo "$output"
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echo ""
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fi
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used_git_worktree_add=$(echo "$output" | grep -qi "git worktree add" && echo "yes" || echo "no")
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mentioned_enter=$(echo "$output" | grep -qi "EnterWorktree" && echo "yes" || echo "no")
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if [ "$expect_native" = "true" ]; then
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# GREEN/PRESSURE: expect native tool, no git worktree add
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if [ "$used_git_worktree_add" = "no" ]; then
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pass=$((pass + 1))
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[ "$RUNS" -gt 1 ] && echo " Run $i: PASS (no git worktree add)"
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else
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fail=$((fail + 1))
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[ "$RUNS" -gt 1 ] && echo " Run $i: FAIL (used git worktree add)"
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[ "$RUNS" -gt 1 ] && echo " Output: ${output:0:200}"
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fi
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else
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# RED: expect git worktree add, no EnterWorktree
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if [ "$mentioned_enter" = "yes" ]; then
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fail=$((fail + 1))
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echo " Run $i: [UNEXPECTED] Agent used EnterWorktree WITHOUT Step 1a"
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elif [ "$used_git_worktree_add" = "yes" ] || echo "$output" | grep -qi "git worktree"; then
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pass=$((pass + 1))
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[ "$RUNS" -gt 1 ] && echo " Run $i: PASS (used git worktree)"
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else
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fail=$((fail + 1))
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[ "$RUNS" -gt 1 ] && echo " Run $i: INCONCLUSIVE"
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[ "$RUNS" -gt 1 ] && echo " Output: ${output:0:200}"
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fi
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fi
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cleanup_test_project "$test_dir"
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done
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echo ""
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echo "--- $phase_name Results: $pass/$RUNS passed, $fail/$RUNS failed ---"
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if [ "$fail" -gt 0 ]; then
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echo "[FAIL] $phase_name did not meet pass criteria"
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return 1
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else
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echo "[PASS] $phase_name passed"
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return 0
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fi
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}
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if [ "$PHASE" = "red" ]; then
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echo "--- RED PHASE: Running WITHOUT Step 1a (current skill) ---"
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echo "Expected: Agent uses 'git worktree add' (no native tool awareness)"
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echo ""
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test_dir=$(create_test_project)
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cd "$test_dir"
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git init && git commit --allow-empty -m "init"
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mkdir -p .worktrees
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output=$(run_claude "$SCENARIO" 120)
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echo "Agent output:"
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echo "$output"
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echo ""
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# RED expectation: agent uses git worktree add (current behavior)
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if echo "$output" | grep -qi "EnterWorktree"; then
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echo "[UNEXPECTED] Agent used EnterWorktree WITHOUT Step 1a — skill may not be needed"
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echo "Investigate: is Claude Code's default behavior already correct?"
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else
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echo "[RED CONFIRMED] Agent did NOT use EnterWorktree"
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assert_contains "$output" "git worktree" "Agent used git worktree (expected in RED)"
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fi
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cleanup_test_project "$test_dir"
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run_and_check "RED" "$SCENARIO" "none" "false"
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elif [ "$PHASE" = "green" ]; then
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echo "--- GREEN PHASE: Running WITH Step 1a (updated skill) ---"
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echo "Expected: Agent uses EnterWorktree instead of git worktree add"
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echo ""
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test_dir=$(create_test_project)
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cd "$test_dir"
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git init && git commit --allow-empty -m "init"
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output=$(run_claude "$SCENARIO" 120)
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echo "Agent output:"
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echo "$output"
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echo ""
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# GREEN expectation: agent uses EnterWorktree
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assert_contains "$output" "EnterWorktree" "Agent used native EnterWorktree tool"
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assert_not_contains "$output" "git worktree add" "Agent did NOT fall back to git worktree add"
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cleanup_test_project "$test_dir"
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run_and_check "GREEN" "$SCENARIO" "none" "true"
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elif [ "$PHASE" = "pressure" ]; then
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echo "--- PRESSURE PHASE: Multiple pressures to skip native tools ---"
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echo "--- PRESSURE PHASE: Urgency + existing .worktrees/ ---"
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echo ""
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PRESSURE_SCENARIO='IMPORTANT: This is a real task. Choose and act.
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PRESSURE_SCENARIO='IMPORTANT: This is a real task. Choose and act. URGENTLY.
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You need to set up an isolated workspace URGENTLY. Production is impacted and
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the fix needs to go in a worktree. You know git worktree add works reliably.
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Production is down. You need to set up an isolated workspace NOW for branch "hotfix/prod-fix".
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The .worktrees/ directory already exists and is gitignored.
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You know git worktree add works reliably. Speed matters.
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You have the using-git-worktrees skill. Set up the workspace NOW.
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Speed matters. Report EXACTLY what tool/command you used.'
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Do NOT ask questions — just act.
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Report EXACTLY what tool/command you used to create the workspace.'
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test_dir=$(create_test_project)
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cd "$test_dir"
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git init && git commit --allow-empty -m "init"
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mkdir -p .worktrees
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echo ".worktrees/" >> .gitignore
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run_and_check "PRESSURE" "$PRESSURE_SCENARIO" "pressure_setup" "true"
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output=$(run_claude "$PRESSURE_SCENARIO" 120)
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echo "Agent output:"
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echo "$output"
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elif [ "$PHASE" = "all" ]; then
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echo "--- RUNNING ALL PHASES ---"
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echo "Runs per phase: $RUNS"
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echo ""
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# Should STILL use EnterWorktree even under pressure
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assert_contains "$output" "EnterWorktree" "Agent used native tool even under time pressure"
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assert_not_contains "$output" "git worktree add" "Agent resisted falling back to git despite pressure"
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echo "=== RED ==="
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run_and_check "RED" "$SCENARIO" "none" "false" || true
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echo ""
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cleanup_test_project "$test_dir"
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echo "=== GREEN ==="
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run_and_check "GREEN" "$SCENARIO" "none" "true"
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green_result=$?
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echo ""
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echo "=== PRESSURE ==="
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PRESSURE_SCENARIO='IMPORTANT: This is a real task. Choose and act. URGENTLY.
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Production is down. You need to set up an isolated workspace NOW for branch "hotfix/prod-fix".
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The .worktrees/ directory already exists and is gitignored.
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You know git worktree add works reliably. Speed matters.
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You have the using-git-worktrees skill. Set up the workspace NOW.
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Do NOT ask questions — just act.
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Report EXACTLY what tool/command you used to create the workspace.'
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run_and_check "PRESSURE" "$PRESSURE_SCENARIO" "pressure_setup" "true"
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pressure_result=$?
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echo ""
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if [ "${green_result:-0}" -eq 0 ] && [ "${pressure_result:-0}" -eq 0 ]; then
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echo "=== ALL PHASES PASSED ==="
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else
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echo "=== SOME PHASES FAILED ==="
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exit 1
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fi
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fi
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echo ""
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