補上「有動作、不宣告」那一格：主線閒置警察（inkstone/ISEP#30）
空手警察判「有沒有動作」、稼動率警察判「有沒有那句話」，兩支中間留了一格： **有動作、就是不宣告下一步** ⇒ 兩支都放行。2026-08-27 實際發生的就是這一格。 新閘 hooks/mainline-idle-guard.sh（Stop）判的是「有沒有推進」，不是「有沒有動作」： - 乾回合 ＝ 這回合 ≥3 個 tool call，且沒有任何推進證據 - 推進證據五種（任一成立就歸零）：派工／產出／寫進外部系統／Bash 寫入白名單／ **工作區狀態變了**（HEAD 或未提交變更的指紋，heredoc·sed 改檔也吃得到） - 連續 4 個乾回合擋一次，擋完歸零且**門檻加倍**（4→8→16） 一個字都不讀（守票上「不准文字層判準」那條紅線）；③④ 的字面比對只用來放行， 永遠不用來擋——白名單漏一項是少放行一次，黑名單漏一項是誤攔一次。 門檻 4 是量出來的，不是拍腦袋：重放 6 份真 transcript、1965 個真實回合， 門檻 3 響 4 次、門檻 4 響 1 次（0.05%）；門檻 3 多出來那三次都落在 「leo 連問問題、我逐題查證回答」的段落——那正是票上第 3 條驗收要保護的情境。 測試 hooks/tests/mainline-idle-guard.test.sh：61 條，A 群 15 條全是「不該擋」。 Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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#!/usr/bin/env bash
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# mainline-idle-guard.sh 的迴歸測試（inkstone/ISEP#30 → comment 4851）
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#
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# 兩個方向都要有證據：
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# A 群「不該擋」——回答問題、輕量回合、任何一種推進證據、未達門檻、響過之後退讓
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# B 群「該擋」 ——連續乾回合（有動作、零推進）踩到門檻
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# C 群「訊息承諾的出路真的走得通」——擋完歸零、門檻加倍
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#
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# 用法：hooks/tests/mainline-idle-guard.test.sh [hooks/mainline-idle-guard.sh 的路徑]
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# 🔴 全程在乾淨的 TMP 底下造假 transcript 與假狀態檔，跑完自己清；
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# 不碰任何真 repo、不打網路、不寫 /tmp 的正式狀態檔（走 MAINLINE_IDLE_STATE_DIR）。
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set -u
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HOOK="${1:-$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)/mainline-idle-guard.sh}"
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TMP=$(mktemp -d)
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trap 'rm -rf "$TMP"' EXIT
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PASS=0; FAIL=0; N=0
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# append_turn <transcript> <block spec>...
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# block spec：`T:<文字>` ＝ assistant 文字段；`U:<工具名>` ＝ tool_use；
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# `B:<指令>` ＝ Bash tool_use（帶 command）
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append_turn() {
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python3 - "$@" <<'PY'
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import json, sys
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path, specs = sys.argv[1], sys.argv[2:]
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blocks = []
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for s in specs:
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k, v = s.split(":", 1)
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if k == "T":
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blocks.append({"type": "text", "text": v})
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elif k == "B":
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blocks.append({"type": "tool_use", "name": "Bash", "id": "t", "input": {"command": v}})
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else:
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blocks.append({"type": "tool_use", "name": v, "id": "t", "input": {}})
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with open(path, "a") as f:
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f.write(json.dumps({"type": "user",
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"message": {"content": [{"type": "text", "text": "繼續"}]}},
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ensure_ascii=False) + "\n")
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f.write(json.dumps({"type": "assistant", "message": {"content": blocks}},
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ensure_ascii=False) + "\n")
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PY
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}
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# fire <session> <transcript> <期望 exit> <說明> [extra-json]
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fire() {
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sid="$1"; tr="$2"; want="$3"; desc="$4"; extra="${5:-}"
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N=$((N+1))
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payload=$(printf '{"session_id":"%s","transcript_path":"%s"%s}' "$sid" "$tr" "$extra")
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out=$(printf '%s' "$payload" \
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| CLAUDE_PROJECT_DIR="${PROJ_OVERRIDE:-$TMP}" \
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MAINLINE_IDLE_STATE_DIR="$TMP" bash "$HOOK" 2>&1); rc=$?
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if [ "$rc" -eq "$want" ]; then
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printf ' ✅ %s\n' "$desc"; PASS=$((PASS+1))
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else
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printf ' ❌ %s —— 期望 exit=%s，實得 exit=%s\n' "$desc" "$want" "$rc"
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printf '%s\n' "$out" | sed -n '1,6p' | sed 's/^/ /'
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FAIL=$((FAIL+1))
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fi
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}
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# 造一個新 session 的 transcript，並吃掉第一次的 baseline
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new_session() {
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sid="$1"; tr="$TMP/$sid.jsonl"; : > "$tr"
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append_turn "$tr" 'U:Read'
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printf '{"session_id":"%s","transcript_path":"%s"}' "$sid" "$tr" \
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| CLAUDE_PROJECT_DIR="${PROJ_OVERRIDE:-$TMP}" MAINLINE_IDLE_STATE_DIR="$TMP" \
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bash "$HOOK" >/dev/null 2>&1
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echo "$tr"
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}
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DRY=(U:Read U:Grep B:git\ status U:Read) # 4 個動作、零推進 ＝ 乾回合
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echo "── A 群：不該擋 ────────────────────────────────────────────"
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tr=$(new_session s-light)
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fire s-light "$tr" 0 "① 第一次見到這個 session（立基準，不評分）"
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# 票上第 3 條驗收：回答一個不需要派工的問題 ⇒ 放行（且**不計數**）
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for i in 1 2 3 4 5; do
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append_turn "$tr" 'U:Read' 'U:Grep' "T:查了一下，答案是 X。"
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fire s-light "$tr" 0 "② 回答問題的輕量回合（2 個動作）第 $i 次——連 5 次都不該擋"
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done
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tr=$(new_session s-dispatch)
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for i in 1 2 3 4; do
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append_turn "$tr" "${DRY[@]}" 'U:Agent'
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fire s-dispatch "$tr" 0 "③ 有派工（Agent）第 $i 次 ⇒ 永遠歸零"
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done
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tr=$(new_session s-send)
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for i in 1 2 3 4; do
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append_turn "$tr" "${DRY[@]}" 'U:SendMessage'
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fire s-send "$tr" 0 "④ 驅動既有 agent（SendMessage）第 $i 次"
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done
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tr=$(new_session s-write)
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for i in 1 2 3 4; do
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append_turn "$tr" "${DRY[@]}" 'U:Edit'
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fire s-write "$tr" 0 "⑤ 有產出（Edit）第 $i 次"
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done
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tr=$(new_session s-ticket)
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for i in 1 2 3 4; do
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append_turn "$tr" 'U:Read' 'U:Grep' 'B:scripts/ticket say inkstone/ISEP#30 -F /tmp/x.md'
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fire s-ticket "$tr" 0 "⑥ 寫回票（scripts/ticket say）第 $i 次"
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done
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tr=$(new_session s-mcp)
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for i in 1 2 3 4; do
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append_turn "$tr" "${DRY[@]}" 'U:mcp__x__kbdb_create_record'
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fire s-mcp "$tr" 0 "⑦ 寫進外部系統（kbdb_create_record）第 $i 次"
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done
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tr=$(new_session s-under)
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for i in 1 2 3; do
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append_turn "$tr" "${DRY[@]}"; fire s-under "$tr" 0 "⑧ 第 $i 個乾回合——未達門檻（4），不擋"
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done
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tr=$(new_session s-active)
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append_turn "$tr" "${DRY[@]}"
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fire s-active "$tr" 0 "⑩ stop_hook_active（已被別的 Stop 閘擋過）⇒ 不計數" ',"stop_hook_active":true'
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append_turn "$tr" "${DRY[@]}"
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fire s-active "$tr" 0 "⑪ 同上，第 2 次仍不擋（不會被別的閘的擋下推著累積）" ',"stop_hook_active":true'
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tr=$(new_session s-dup)
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append_turn "$tr" "${DRY[@]}"
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fire s-dup "$tr" 0 "⑫ 同一個回合被叫兩次（transcript 沒長）——第 1 次"
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fire s-dup "$tr" 0 "⑬ 同上第 2 次：不重複計數"
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fire s-dup "$tr" 0 "⑭ 同上第 3 次：仍不擋（重複呼叫不該累積成擋下）"
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fire s-bad "$TMP/does-not-exist.jsonl" 0 "⑮ 讀不到 transcript ⇒ 放行（不亂擋）"
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echo "── B 群：該擋 ──────────────────────────────────────────────"
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tr=$(new_session s-idle)
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for i in 1 2 3; do
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append_turn "$tr" "${DRY[@]}"; fire s-idle "$tr" 0 "⑯ 乾回合 $i／4"
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done
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append_turn "$tr" "${DRY[@]}"; fire s-idle "$tr" 2 "⑰ 乾回合 4／4 ⇒ **擋下**"
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tr=$(new_session s-idle2)
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for i in 1 2 3; do
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append_turn "$tr" 'U:Read' 'U:Read' 'U:Read'; fire s-idle2 "$tr" 0 "⑱ 純唯讀乾回合 $i／4"
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done
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append_turn "$tr" 'U:Bash' 'U:Bash' 'U:Read'; fire s-idle2 "$tr" 2 "⑲ 唯讀 Bash 也算乾回合 ⇒ **擋下**"
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echo "── C 群：響過就退讓（訊息裡承諾的出路真的存在）───────────────"
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# 接續 s-idle：它剛在 ⑰ 被擋過 ⇒ 計數歸零、門檻 4→8
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tr="$TMP/s-idle.jsonl"
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for i in 1 2 3 4 5 6 7; do
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append_turn "$tr" "${DRY[@]}"
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fire s-idle "$tr" 0 "⑳ 擋過之後第 $i 個乾回合——門檻已加倍（4→8），不該再響"
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done
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append_turn "$tr" "${DRY[@]}"
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fire s-idle "$tr" 2 "㉑ 第 8 個乾回合 ⇒ 再擋一次（門檻 8）"
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# 量測用的旋鈕要真的有效（檔頭那份實測靠它重跑）
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export MAINLINE_IDLE_THRESHOLD=2
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tr=$(new_session s-th)
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append_turn "$tr" "${DRY[@]}"; fire s-th "$tr" 0 "㉒ MAINLINE_IDLE_THRESHOLD=2：第 1 個乾回合"
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append_turn "$tr" "${DRY[@]}"; fire s-th "$tr" 2 "㉓ 同上第 2 個 ⇒ 擋（證明門檻可被量測腳本改）"
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unset MAINLINE_IDLE_THRESHOLD
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echo "── D 群：工作區狀態變了就算推進（heredoc／sed 改檔吃得到）──────"
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REPO="$TMP/repo"; mkdir -p "$REPO"
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git -C "$REPO" init -q 2>/dev/null
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git -C "$REPO" config user.email t@t; git -C "$REPO" config user.name t
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echo a > "$REPO/a.txt"; git -C "$REPO" add -A; git -C "$REPO" commit -qm init
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PROJ_OVERRIDE="$REPO"
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tr=$(new_session s-git)
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for i in 1 2 3; do
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append_turn "$tr" "${DRY[@]}"; fire s-git "$tr" 0 "㉔ 乾回合 $i／4（工作區沒動）"
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done
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# 用 heredoc／sed 改檔——工具名是 Bash、指令不在白名單，只有狀態指紋看得出來
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echo "changed by heredoc" >> "$REPO/a.txt"
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append_turn "$tr" "${DRY[@]}"; fire s-git "$tr" 0 "㉕ 第 4 個乾回合，但工作區變了 ⇒ 算推進，不擋"
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for i in 1 2 3; do
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append_turn "$tr" "${DRY[@]}"; fire s-git "$tr" 0 "㉖ 之後乾回合 $i／4（證明上一格真的歸零過）"
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done
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append_turn "$tr" "${DRY[@]}"; fire s-git "$tr" 2 "㉗ 乾回合 4／4 ⇒ **擋下**"
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PROJ_OVERRIDE=""
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echo
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printf '結果：%s 通過 / %s 失敗（共 %s 條）\n' "$PASS" "$FAIL" "$N"
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[ "$FAIL" -eq 0 ] || exit 1
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