#!/usr/bin/env bash
# 任务启动门禁：precheck / start / resume / sync / close / finish（配套 Makefile 同名目标）。
# 规范依据：collaboration.md 共同基线与同步节点、治理清理；delivery.md §1/§5。
set -euo pipefail

TARGET_BRANCH="${TASK_TARGET_BRANCH:-main}"
SCRIPT_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)

die() { echo "ERROR: $*" >&2; exit 1; }
need_repo() { git rev-parse --git-dir >/dev/null 2>&1 || die "not inside a git repository"; }
width() { python3 -c 'import sys,unicodedata;print(sum(2 if unicodedata.east_asian_width(c) in "WF" else 1 for c in sys.argv[1]))' "$1"; }
fetch_target() {
  git check-ref-format "refs/heads/${TARGET_BRANCH}" >/dev/null || die "invalid target branch"
  if ! git fetch -q origin "refs/heads/${TARGET_BRANCH}:refs/remotes/origin/${TARGET_BRANCH}"; then
    echo "[verdict] REMOTE_UNVERIFIED — cannot refresh authoritative origin/${TARGET_BRANCH}; preserve local work and retry" >&2
    return 6
  fi
  git rev-parse --verify "refs/remotes/origin/${TARGET_BRANCH}^{commit}" >/dev/null \
    || { echo "[verdict] REMOTE_UNVERIFIED — target commit missing" >&2; return 6; }
}
check_worktree() { python3 "${SCRIPT_DIR}/check-worktree.py" "$1"; }
main_worktree_root() { git worktree list --porcelain -z | python3 -c 'import os,sys; print(os.fsdecode(sys.stdin.buffer.read().split(bytes([0]),1)[0][9:]))'; }
work_mode() {
  case "${TASK_WORK_MODE:-delivery}" in
    delivery|local) printf '%s\n' "${TASK_WORK_MODE:-delivery}" ;;
    *) die "TASK_WORK_MODE must be delivery or local" ;;
  esac
}

cmd_precheck() {
  need_repo
  local mode
  mode=$(work_mode)
  fetch_target
  local branch head rmain dirty sub_drift sub_uninit
  branch=$(git rev-parse --abbrev-ref HEAD)
  head=$(git rev-parse HEAD)
  rmain=$(git rev-parse --verify "origin/${TARGET_BRANCH}")
  dirty=$(git status --porcelain | { grep -v '^.. \.zcode/' || true; } | wc -l)
  sub_drift=$(git submodule status --recursive 2>/dev/null | { grep -cE '^\+|^U' || true; })
  sub_uninit=$(git submodule status --recursive 2>/dev/null | { grep -cE '^-' || true; })
  local behind ahead
  behind=$(git rev-list --count "HEAD..origin/${TARGET_BRANCH}")
  ahead=$(git rev-list --count "origin/${TARGET_BRANCH}..HEAD")
  echo "[repo]   branch=${branch} head=$(echo "$head" | cut -c1-10)"
  echo "[remote] origin/${TARGET_BRANCH}=$(echo "$rmain" | cut -c1-10) ahead=${ahead} behind=${behind}"
  echo "[tree]   $([ "$dirty" -eq 0 ] && echo clean || echo "dirty(${dirty})") submodules_drift=${sub_drift} uninit=${sub_uninit}"
  local wt merged
  wt=$(git worktree list | tail -n +2 | wc -l)
  merged=$(git branch --merged "origin/${TARGET_BRANCH}" 2>/dev/null | { grep -vE 'main|master|\*' || true; } | tr -d ' +')
  [ "${sub_uninit:-0}" -gt 0 ] && echo "[warn] ${sub_uninit} 个子模块未初始化——构建/测试前需物化（不阻断写入）"
  echo "[worktrees] linked=${wt}"
  [ -n "$merged" ] && echo "[recycle] merged un-recycled branches: $(echo $merged)"
  local open_cards="" pc pb pst
  for pc in .task/*.md; do
    [ -f "$pc" ] || continue
    pb=$(card_of_branch "$pc"); [ -n "$pb" ] || continue
    pst=$(card_status "$pc"); case "$pst" in 已完成*) continue ;; esac
    card_pending "${pc##*/}" && continue
    if git log --merges --format='%s' "origin/${TARGET_BRANCH}" 2>/dev/null | grep -qF " from $pb into ${TARGET_BRANCH}"; then
      open_cards="${open_cards} ${pc##*/}"
    fi
  done
  [ -n "$open_cards" ] && echo "[cards] 已合入未闭合任务卡:$(echo $open_cards)——make task-close 回填归档（主检出运行）"
  local done_open="" stale="" now ts ref
  for pc in .task/*.md; do
    [ -f "$pc" ] || continue
    case "$(card_status "$pc")" in
      已完成*) done_open="${done_open} ${pc##*/}" ;;
    esac
  done
  [ -n "$done_open" ] && echo "[cards] 已完成但未归档:$(echo $done_open)"
  now=$(date +%s)
  while read -r ref ts; do
    [ -n "$ref" ] || continue
    git merge-base --is-ancestor "$ref" "origin/${TARGET_BRANCH}" 2>/dev/null && continue
    if [ $((now - ts)) -gt 86400 ]; then
      stale="${stale} ${ref#origin/}"
    fi
  done < <(git for-each-ref --format='%(refname:short) %(committerdate:unix)' "refs/remotes/origin/feature/card-close-*")
  [ -n "$stale" ] && echo "[cards] 闭合分支超过 24 小时未合入:$(echo $stale)"
  # [hooks] 声明≠能力：core.hooksPath 未指向 scripts/hooks 时，"钩子已启用"只是声明。
  local hp; hp=$(git config core.hooksPath 2>/dev/null || true)
  if [ "$hp" = "scripts/hooks" ] && [ -x scripts/hooks/pre-commit ]; then
    echo "[hooks]   core.hooksPath=scripts/hooks（pre-commit/post-merge 实际接线）"
  else
    echo "[hooks]   WARN core.hooksPath='${hp:-未设置}'——本地钩子未生效，先 make setup；本检出提交将绕过本地闸（远端准入仍在）"
  fi
  # [facts] 外部事实登记表过期项（policy/facts.md；引用前先跑其验证命令，AGENTS.md 证据与验证门禁）。
  if [ -f policy/facts.md ]; then
    local fid lv ttl expired="" ftotal=0
    while IFS='|' read -r _ fid _ _ lv ttl _; do
      fid=$(echo "${fid:-}" | tr -d ' '); case "$fid" in F[0-9]*) ;; *) continue ;; esac
      ftotal=$((ftotal+1))
      lv=$(echo "$lv" | tr -d ' '); ttl=$(echo "$ttl" | tr -d ' ')
      case "$lv" in [0-9][0-9][0-9][0-9]-[0-9][0-9]-[0-9][0-9]) ;; *) expired="$expired ${fid}(日期格式)"; continue ;; esac
      case "$ttl" in ''|*[!0-9]*) ttl=30 ;; esac
      if [ $(( $(date +%s) - $(date -d "$lv" +%s) )) -gt $(( ttl*86400 )) ]; then
        expired="$expired ${fid}(last=${lv},ttl=${ttl}d)"
      fi
    done < <(grep -E '^\| *F[0-9]+ ' policy/facts.md || true)
    if [ -n "$expired" ]; then
      echo "[facts]   WARN 过期事实:$(echo $expired)——引用前先 make facts-verify 重验并更新登记表"
    else
      echo "[facts]   policy/facts.md ${ftotal} 条事实均在有效期内"
    fi
  else
    echo "[facts]   WARN policy/facts.md 不存在——外部事实登记表缺失（AGENTS.md 证据与验证门禁）"
  fi
  echo "[required-reading] core/baseline.md, workflows/delivery.md §1$([ -f policy/delivery.md ] && echo ", policy/delivery.md")$([ "$dirty" -gt 0 ] && echo ", standards/collaboration.md（树脏=他人或未收尾现场，不得写入）")"
  if [ "$mode" = local ]; then
    echo "[target] ${rmain}（observed; task initial baseline is reported separately）"
  else
    echo "[R0] $(echo "$rmain" | cut -c1-10)（完整：$rmain）"
  fi
  if [ "$dirty" -gt 0 ] || [ "${sub_drift:-0}" -gt 0 ]; then
    echo "[verdict] SHARED_WORKSPACE_BUSY — 工作树不干净，不得写入；先收尾或经 owner 确认"
    exit 3
  fi
  if [ "$mode" = local ]; then
    python3 "${SCRIPT_DIR}/evidence.py" --local-context || return 2
    echo "[verdict] LOCAL_READY — existing task may continue authorized local work; final delivery still requires latest-target sync and checks"
    return 0
  fi
  if ! check_worktree before-sync; then
    echo "[verdict] SHARED_WORKSPACE_BUSY — component or active operation check failed; preserve the workspace"
    exit 3
  fi
  if [ "$behind" -gt 0 ]; then
    echo "[verdict] SYNC_REQUIRED — ${branch} 缺少 origin/${TARGET_BRANCH} 的 ${behind} 个提交；主检出 pull --ff-only，任务分支 make task-sync"
    exit 4
  fi
  echo "[verdict] READY — 保留本次 precheck receipt 后建任务工作区：PRECHECK_RECEIPT=/tmp/task-precheck.json make task-start NAME=feature/your-branch"
}

cmd_start() {
  need_repo
  local name="${1:-}"; [ -n "$name" ] || die "usage: task.sh start <feature|fix|hotfix|release>/<slug>"
  echo "$name" | grep -qE '^(feature|fix|hotfix|release)/[A-Za-z0-9._-]+$' || die "branch name must match (feature|fix|hotfix|release)/<slug>"
  fetch_target
  [ -n "${PRECHECK_RECEIPT:-}" ] || die "PRECHECK_RECEIPT required: capture RECEIPT=/tmp/task-precheck.json CMD='make precheck' make evidence first"
  PRECHECK_RECEIPT=$(realpath -- "$PRECHECK_RECEIPT")
  VALIDATE_RECEIPT="$PRECHECK_RECEIPT" VALIDATE_RECEIPT_PURPOSE=start bash "${SCRIPT_DIR}/evidence.sh"
  check_worktree before-sync
  # 已合入的同名分支不得重建（2026-10-05 实测：合入后再 task-start 同名会从新 main 长出
  # 第二段历史，空卡覆盖已合入任务卡，两轮证据差点丢失）。复核/追加沿用原分支或换新 slug。
  local guard_ref
  for guard_ref in "refs/heads/${name}" "refs/remotes/origin/${name}"; do
    if git rev-parse -q --verify "${guard_ref}" >/dev/null \
      && git merge-base --is-ancestor "${guard_ref}" "origin/${TARGET_BRANCH}"; then
      die "branch ${name} already merged into origin/${TARGET_BRANCH} — reuse the original branch or pick a new slug (task-start must not recreate merged cards)"
    fi
  done
  [ "$(git status --porcelain | { grep -v '^.. \.zcode/' || true; } | wc -l)" -eq 0 ] || die "dirty tree — resolve first (precheck verdict BUSY)"
  [ "$(git submodule status --recursive 2>/dev/null | { grep -cE '^\+|^U' || true; })" -eq 0 ] || die "submodule drift/conflict — resolve first (precheck verdict BUSY)"
  git merge-base --is-ancestor "origin/${TARGET_BRANCH}" HEAD || die "local ${TARGET_BRANCH} behind origin — pull --ff-only first"
  local rmain slug wt mainroot start_ref parent_head="" parent_note=""
  rmain=$(git rev-parse "origin/${TARGET_BRANCH}")
  start_ref=$rmain
  if [ -n "${TASK_PARENT_BRANCH:-}${TASK_PARENT_PR:-}" ]; then
    [ -n "${TASK_PARENT_BRANCH:-}" ] && [ -n "${TASK_PARENT_PR:-}" ] || die "stacked task requires TASK_PARENT_BRANCH and TASK_PARENT_PR"
    echo "$TASK_PARENT_BRANCH" | grep -qE '^(feature|fix|hotfix|release)/[A-Za-z0-9._-]+$' || die "invalid parent task branch"
    echo "$TASK_PARENT_PR" | grep -qE '^https?://[^[:space:]]+/pulls/[0-9]+$' || die "TASK_PARENT_PR must be a parent PR URL"
    case "${name#*/}" in "${TASK_PARENT_BRANCH#*/}"-?*) ;; *) die "stacked child slug must start with parent slug plus '-'" ;; esac
    parent_head=$(git rev-parse --verify "refs/heads/${TASK_PARENT_BRANCH}^{commit}") || die "parent branch missing locally"
    git merge-base --is-ancestor "$rmain" "$parent_head" || die "parent branch does not include current origin/${TARGET_BRANCH}; sync it first"
    start_ref=$parent_head
    parent_note="- 堆叠父任务：${TASK_PARENT_BRANCH}；父 PR：${TASK_PARENT_PR}；parent_head_sha=${parent_head}；父合入后 task-sync 并将 PR base 改回 ${TARGET_BRANCH}"
  fi
  slug=$(echo "$name" | tr '/' '-')
  # 落点须为主检出的平级目录：$PWD 推算在子目录（或任务 worktree 内）运行时会算错，
  # 以 Git 登记表定位主检出，兼容 linked worktree 与独立 git-dir。
  mainroot=$(main_worktree_root)
  wt="$(dirname "$mainroot")/$(basename "$mainroot")-wt-${slug}"
  [ -e "$wt" ] && die "worktree path exists: $wt"
  git worktree add -q "$wt" -b "$name" "$start_ref"
  # 物化后按 submodule status 实际状态核对，不只信退出码：网络抖动或嵌套指针
  # 漂移时 update 可能静默留坑（2026-09-30 实测深嵌套层带病通过，构建期才炸）。
  (cd "$wt" && git submodule update --init --recursive >/dev/null 2>&1) \
    || echo "[warn] submodule update 非零退出，见下方状态核对"
  local sub_drift
  sub_drift=$(git -C "$wt" submodule status --recursive 2>/dev/null | grep -cE '^[-+U]' || true)
  [ "${sub_drift:-0}" -gt 0 ] \
    && echo "[warn] worktree 子模块物化不完整：${sub_drift} 项漂移/未初始化——构建前先核对（git -C $wt submodule status --recursive）"
  local card="$wt/.task/${slug}.md"
  mkdir -p "$wt/.task"
  cat > "$card" <<EOF
# ${name} 任务卡

任务主记录：<PR 链接，交付前填写>；状态：进行中；owner：$(git config user.name || echo unknown)

## 基线与授权

- 权威仓：$(git -C "$wt" remote get-url origin 2>/dev/null || echo '(local)')；目标分支：${TARGET_BRANCH}；R0（initial_base_sha）= ${rmain}
- 工作区：${wt}（worktree）；分支：${name}
${parent_note}
- 授权与交付终点：<本次允许的动作与终点；未授权事项写明>
- 交付模式：manual（前序人工决策，智能体 Review/合入）；其他阶段明确授权后可记为 authorized-continuous
- 合入执行：agent（已授权交付范围内，Review 通过、冲突解决且当前 HEAD 的 CI 通过后合入）
- 自动推进授权：无；授权范围：无；授权来源：无；授权终点：无；停止条件：无（未授权）
- 当前阶段：需求拆解；当前增量：I1（待定义）
- 流程依据：仓库根目录 policy/delivery.md（归档后仍按仓库根目录定位）

## 目标与非目标

<预期结果、受影响入口/模块/契约；明确不做什么。>

## 关联方向与规划

- 适用状态：待核对（无适用规划时说明原因）
- 主记录路径/版本：待核对（路径按仓库根目录定位，归档后不变；只引用唯一正文）
- 对应里程碑：待核对

## 需求分析

| ID | 描述 | 项目符合度及依据 | 优先级 | 验收条件 | 依赖 | 结论 |
|---|---|---|---|---|---|---|
| R1 | 待填写 | 待评估 | 待定 | 待定义 | 待确认 | 待评审 |

## 方案与计划

- 方案引用：待填写（含对象版本）
- 实施计划引用：待填写（含增量与需求 ID）
- 测试计划引用：待填写（含需求 ID 与验收条件）

## 阶段评审

| 阶段 | 对象版本 | 结论 | 评审人 | 时间 | 依据 |
|---|---|---|---|---|---|
| 需求拆解 | 待定 | 未评审 | — | — | — |
| 需求评估 | 待定 | 未评审 | — | — | — |
| 需求表确认 | 待定 | 未评审 | — | — | — |
| 方案设计 | 待定 | 未评审 | — | — | — |
| 实施计划 | 待定 | 未评审 | — | — | — |
| 实施与自检 | 待定 | 未评审 | — | — | — |
| 正式测试与验收 | 待定 | 未评审 | — | — | — |
| 代码 Review | 待定 | 未评审 | — | — | — |
| 合入 | 待定 | 未评审 | — | — | — |
| 合入核验与收口 | 待定 | 未评审 | — | — | — |

## 探索试验与迭代

| 增量/试验 | 假设 | 范围 | 判断和停止条件 | 批准依据 | 结果 | 变更影响 | 需重审补测 |
|---|---|---|---|---|---|---|---|
| 待定义 | — | — | — | 未批准 | NOT_RUN | 待评估 | 待评估 |

## 同步记录

| 节点 | sync_base_sha | tested_head_sha | checked_at |
|---|---|---|---|
| 启动 | ${rmain} | $(git -C "$wt" rev-parse HEAD) | $(date -u +%FT%TZ) |

## 证据（Evidence）

<!-- CMD="<命令>" make evidence 写入；手抄/转写输出视为无效证据（AGENTS.md 证据与验证门禁）。 -->
| 时间(UTC) | 命令 | 被测HEAD | exit | 来源 | sha256(16) |
|---|---|---|---|---|---|

## 结果与验证（完成后填写）

- 结果：
- 验证：<结论摘要 PASS/FAIL/SKIP/NOT_RUN 逐项；逐条证据由 make evidence 写入上方证据表>
- 影响与剩余项：

## 规划进展与下一步

- 本次推进/剩余：待核对（依据实际成果更新适用方案/规划）
- 首选下一任务：待核对（无适用规划、已完成或受阻时如实说明，不虚构任务）
- 推荐依据：待填写
- 前置条件/待确认：待核对
- 预期产物/验收条件：待定义
- 重复任务核对：待核对（已有/在途任务、PR 与规划记录）
- 启动授权：未授权（建议不自动启动新任务，仍须明确授权）

## 合入与清理

- Review 记录：NOT_RUN（审阅智能体/平台身份、base/head、结论、问题闭合及重放依据）
- 冲突记录：NOT_RUN（最新目标同步、冲突处置、组合兼容核验及复审/补测）
- CI 记录：NOT_RUN（当前 HEAD 完整 SHA、全部必需检查、运行链接、执行身份及 GATE 结果）
- 合入记录：NOT_RUN（交付授权范围、PR、被核验 HEAD、合入 SHA、目标分支及内容核验）
- 清理记录：NOT_RUN（授权依据、写者退出确认、worktree/分支/任务卡处置）
EOF
  (cd "$wt" && IMPORT_RECEIPT="$PRECHECK_RECEIPT" bash "${SCRIPT_DIR}/evidence.sh")
  git -C "$wt" add .task
  git -C "$wt" commit -q -m "Record the task card for ${slug}" \
    -m "Why: establish the authorized task workspace and its initial baseline." \
    -m "Evidence: preserved precheck receipt in .task/${slug}.md; R0=${rmain}." \
    -m "Impact: task metadata only; the feature workspace starts at ${start_ref}." \
    -m "Refs: .task/${slug}.md"
  echo "[card] $card（已随分支提交）"
  echo "[started] branch=${name} worktree=${wt} R0=$(echo "$rmain" | cut -c1-10)"
}

cmd_resume() {
  need_repo
  local mode
  mode=$(work_mode)
  fetch_target
  [ -n "${PRECHECK_RECEIPT:-}" ] || die "PRECHECK_RECEIPT required: capture the current task precheck before resume"
  local receipt
  receipt=$(realpath -- "$PRECHECK_RECEIPT")
  VALIDATE_RECEIPT="$receipt" VALIDATE_RECEIPT_PURPOSE="resume-${mode}" bash "${SCRIPT_DIR}/evidence.sh"
  IMPORT_RECEIPT="$receipt" bash "${SCRIPT_DIR}/evidence.sh"
  echo "[resumed] work_mode=${mode} source_head=$(git rev-parse HEAD) observed_target=$(git rev-parse "origin/${TARGET_BRANCH}")"
}

cmd_sync() {
  need_repo
  fetch_target
  check_worktree before-sync
  local base head card branch slug pc changed=0 ancestry_status
  base=$(git rev-parse "origin/${TARGET_BRANCH}")
  if git merge-base --is-ancestor "$base" HEAD; then
    :
  else
    ancestry_status=$?
    [ "$ancestry_status" -eq 1 ] || die "cannot verify target ancestry"
    git merge --no-edit "$base" \
      -m "Merge authoritative ${TARGET_BRANCH} into the task branch" \
      -m "Why: include the current integration baseline before verification." \
      -m "Evidence: fetched origin/${TARGET_BRANCH}=${base}." \
      -m "Impact: integrate upstream changes without rewriting task history." \
      -m "Refs: task-sync"
    changed=1
  fi
  git merge-base --is-ancestor "$base" HEAD || die "sync incomplete"
  check_worktree before-update
  check_worktree materialize
  check_worktree after-sync
  head=$(git rev-parse HEAD)
  branch=$(git rev-parse --abbrev-ref HEAD)
  slug=$(echo "$branch" | tr '/' '-')
  card=".task/${slug}.md"
  if [ ! -f "$card" ]; then
    card=""
    for pc in .task/*.md; do
      [ -f "$pc" ] || continue
      if [ "$(card_of_branch "$pc")" = "$branch" ]; then
        card=$pc
        break
      fi
    done
  fi
  if [ -n "$card" ] && [ -f "$card" ]; then
    if [ "$changed" -eq 1 ]; then
      printf '| 同步（记录前对象） | %s | %s | %s |\n' "$base" "$head" "$(date -u +%FT%TZ)" >> "$card"
      git add "$card"
      git commit -q -m "Record the sync checkpoint" \
        -m "Why: bind the task validation checkpoint to the integration baseline." \
        -m "Evidence: SELF recursive component checks; sync_base=${base}; before_record=${head}." \
        -m "Impact: task metadata only." -m "Refs: ${card}" -- "$card"
    fi
    # JSON receipts carry before/after state; older table rows remain readable.
    python3 "${SCRIPT_DIR}/check-evidence.py" "$card"
  else
    echo "[warn] 找不到分支 ${branch} 的任务卡，同步记录未写入" >&2
  fi
  head=$(git rev-parse HEAD)
  echo "[synced] sync_base=${base} tested_head=${head} checked_at=$(date -u +%FT%TZ) changed=${changed}"
  echo "[next] 跑正式验收（make test 等），证据写入任务卡"
}

# ---- 卡片闭合（防欠账）----
# 依据：delivery.md §5 治理清理；机制化 2026-09-30 治理缺口（11 张已合入卡片未闭合）。
# 检测 .task/*.md 中"分支已合入 origin/<target> 但状态非已完成"的卡片：回填状态、主记录
# （PR 链接+合并 SHA）与闭合记录，并 git mv 到 .task/archive/。变更落点：主检出运行→
# 新建 feature/card-close-* 分支推送（集成分支受保护，不直推）；任务分支内运行须 --fold
# （随当前任务 PR 合入）。合并判定用合并提交主题（分支删除后仍可追溯），不依赖分支存活。

card_of_branch() { sed -n 's/^- 工作区：.*分支：\([A-Za-z0-9._/-]\+\).*/\1/p' "$1" | head -1; }
card_status() { sed -n 's/^.*；状态：\([^；]*\).*/\1/p' "$1" | head -1; }
card_merge() { # $1=branch → "sha|subject"（该分支合入 origin/<target> 的合并提交）
  git log --merges --format='%H|%s' "origin/${TARGET_BRANCH}" 2>/dev/null \
    | grep -F " from $1 into ${TARGET_BRANCH}" | head -1
}
card_pending() { # $1=卡片文件名——闭合是否已在某 origin/feature/card-close-* 分支待合入
  local cb
  for cb in $(git for-each-ref --format='%(refname:short)' "refs/remotes/origin/feature/card-close-*"); do
    git cat-file -e "${cb}:.task/archive/$1" 2>/dev/null && return 0
  done
  return 1
}
card_backfill() { # $1=card $2=pr_num $3=merge_sha $4=merge_subject $5=web_base（原地改写）
  python3 - "$1" "$2" "$3" "$4" "$5" <<'PY'
import re, sys
path, pr, sha, subject, base = sys.argv[1:6]
s = open(path, encoding='utf-8').read()
s = re.sub(r'状态：[^；\n]*', '状态：已完成（回填）', s, count=1)
m = re.search(r'任务主记录：([^；\n]*)', s)
if m and 'pulls/' not in m.group(1):
    s = s.replace(m.group(1), f'PR #{pr} {base}/pulls/{pr}（merge {sha[:10]}）', 1)
s = s.replace('## 结果与验证（完成后填写）', '## 结果与验证', 1)
s = s.rstrip('\n') + f'''

## 闭合记录（card-autoclose 回填）

- 依据：merge {sha}（PR #{pr}）已包含于 origin/main，分支成果已落盘；本段为合入后回填。
- 合并主题：{subject}
- 归档：随闭合移入 .task/archive/；任务执行期的过程证据见原任务记录与 PR。
'''
open(path, 'w', encoding='utf-8').write(s)
PY
}

cmd_close() {
  need_repo
  local fold=0
  [ "${1:-}" = "--fold" ] && fold=1
  fetch_target
  # 默认值取远端通告的 Web 面（git push 输出的 PR 建议链接）；可用 TASK_CARD_WEB_BASE 覆盖。
  # git-panel 前缀已失效（TLS 握手失败），默认值改为实测可用的 git-home（AGENTS.md 访问事实节）。
  local web_base="${TASK_CARD_WEB_BASE:-https://git-home.u1680832.nyat.app:30319}"
  local url owner repo
  url=$(git remote get-url origin); url="${url%.git}"
  repo=$(basename "$url"); owner=$(basename "$(dirname "$url")")
  local branch c b st m cards=""
  branch=$(git rev-parse --abbrev-ref HEAD)
  for c in .task/*.md; do
    [ -f "$c" ] || continue
    b=$(card_of_branch "$c"); [ -n "$b" ] || continue
    st=$(card_status "$c")
    done_unarchived=0
    case "$st" in 已完成*) done_unarchived=1 ;; esac
    if card_pending "${c##*/}"; then
      echo "[close] ${c##*/} 已有待合入的闭合分支，跳过（等其 PR 合入）"
      continue
    fi
    m=$(card_merge "$b") || m=""
    if [ -z "$m" ]; then
      [ "$done_unarchived" = 1 ] || continue
      m="ARCHIVE"
    fi
    cards="$cards
$c|$b|$m"
  done
  [ -n "$cards" ] || { echo "[close] 无已合入未闭合的任务卡"; exit 0; }
  # 落点：主检出→feature/card-close-* 分支（提交过 pre-commit 分支闸）；任务分支须显式 --fold
  local newbranch=""
  if [ "$branch" = "${TARGET_BRANCH}" ]; then
    [ -z "$(git status --porcelain | grep -v '^.. \.zcode/' || true)" ] || die "主检出树脏——先收尾再 close（防混入未提交现场）"
    newbranch="feature/card-close-$(date -u +%Y%m%d-%H%M%SZ)"
    git rev-parse --verify -q "refs/heads/${newbranch}" >/dev/null && die "分支已存在：${newbranch}"
    git checkout -q -b "$newbranch" "origin/${TARGET_BRANCH}"
  elif [ "$fold" != "1" ]; then
    die "close 在任务分支内须加 --fold（并入当前任务 PR）；或到主检出运行（将建 feature/card-close-* 分支+PR）"
  fi
  local n=0 sha subject pr closed_list=""
  while IFS='|' read -r c b m; do
    [ -n "$c" ] || continue
    if [ "$m" = "ARCHIVE" ]; then
      mkdir -p .task/archive
      git mv "$c" ".task/archive/${c##*/}"
      closed_list="$closed_list ${c##*/}(already-complete)"
      n=$((n+1))
      continue
    fi
    sha="${m%%|*}"; subject="${m#*|}"
    pr=$(printf '%s' "$subject" | sed -n 's/.*(#\([0-9]\+\)) from.*/\1/p')
    [ -n "$pr" ] || pr=unknown
    card_backfill "$c" "$pr" "$sha" "$subject" "${web_base}/${owner}/${repo}"
    mkdir -p .task/archive
    git mv "$c" ".task/archive/${c##*/}"
    closed_list="$closed_list ${c##*/}(PR#${pr})"
    n=$((n+1))
  done <<EOF
$cards
EOF
  local msg; msg=$(mktemp)
  { echo "Close ${n} merged task card(s) and archive them"
    echo
    echo "Why: branches merged into ${TARGET_BRANCH} had left their task cards open; backfill status and archive to prevent bookkeeping debt."
    echo "Evidence: $(echo $closed_list) — merges verified via git log --merges against origin/${TARGET_BRANCH}."
    echo "Impact: .task/*.md moved to .task/archive/ with status backfilled; no code or submodule change."
    echo "Refs: task.sh close (card-autoclose-r1)"
  } > "$msg"
  git add .task
  git commit -q -F "$msg"; rm -f "$msg"
  # push 失败重试一次：家服隧道间歇抖动，单次尝试曾让钩子闭合半途而废（2026-09-30）。
  git push -q -u origin HEAD || { sleep 5; git push -q -u origin HEAD; }
  local headbr pr_url=""
  headbr=$(git rev-parse --abbrev-ref HEAD)
  if [ -n "${GITEA_TOKEN:-}" ]; then
    # HTTPS 面偶发 broken pipe / 超时（AGENTS.md 访问事实节），单发 curl 会让 PR 静默
    # 缺失（闭合分支推了、PR 没建，2026-09-30 三次踩中）：退避重试 + 失败可见 + 终局
    # 按 head 查回可能已存在的 PR（post-merge 钩子与手动 close 并发时 PR 会重复请求）。
    local resp attempt api="${web_base}/api/v1/repos/${owner}/${repo}/pulls"
    for attempt in 1 2 3 4; do
      resp=$(curl -sS -m 25 -X POST -H "Authorization: token ${GITEA_TOKEN}" -H 'Content-Type: application/json' \
        "$api" \
        -d "{\"head\":\"${headbr}\",\"base\":\"${TARGET_BRANCH}\",\"title\":\"Close merged task cards (${headbr})\",\"body\":\"Auto-generated by task.sh close; see commit message for evidence.\"}" 2>&1) || resp=""
      pr_url=$(printf '%s' "$resp" | python3 -c 'import json,sys; d=json.load(sys.stdin); print(d.get("html_url","") if isinstance(d,dict) else "")' 2>/dev/null || true)
      [ -n "$pr_url" ] && break
      echo "[close] 建 PR 第 ${attempt} 次未成功${resp:+（$(printf '%s' "$resp" | head -c 120)）}，退避重试" >&2
      [ "$attempt" = 4 ] || sleep $((attempt * 3))
    done
    if [ -z "$pr_url" ]; then
      resp=$(curl -sS -m 25 -H "Authorization: token ${GITEA_TOKEN}" "$api?state=open" 2>/dev/null || true)
      pr_url=$(printf '%s' "$resp" | python3 -c 'import json,sys
for p in json.load(sys.stdin):
    if p["head"]["ref"] == sys.argv[1]:
        print(p["html_url"]); break' "$headbr" 2>/dev/null || true)
    fi
  fi
  if [ -n "$newbranch" ]; then git checkout -q "${TARGET_BRANCH}"; fi
  if [ -n "$pr_url" ]; then
    echo "[pr] ${pr_url}（智能体按 policy/delivery.md 完成 Review、解决冲突且当前 HEAD 的 CI 通过后合入）"
  else
    echo "[next] 建 PR：${web_base}/${owner}/${repo}/pulls/new?head=${headbr}（智能体按 policy/delivery.md 完成 Review、解决冲突且当前 HEAD 的 CI 通过后合入）"
  fi
  echo "[closed] ${n} 张已合入卡片已回填归档，提交于 ${headbr} 并推送"
}

cmd_finish() {
  need_repo
  local abandon="${1:-}" branch head root mainrepo remote_head="" remote_status
  root=$(git rev-parse --show-toplevel)
  check_worktree finish
  [ "${TASK_WRITERS_STOPPED:-}" = 1 ] || die "TASK_WRITERS_STOPPED=1 required: the workspace owner must first confirm all writers have stopped"
  branch=$(git symbolic-ref --quiet --short HEAD) || die "detached task worktree must be preserved"
  case "$branch" in feature/*|fix/*|hotfix/*|release/*) ;; *) die "refuse to recycle non-task branch ${branch}" ;; esac
  head=$(git rev-parse HEAD)
  mainrepo=$(main_worktree_root)
  fetch_target
  if [ "$abandon" = "--abandon" ]; then
    local reason="${2:-}"; [ -n "$reason" ] || die "--abandon requires a reason"
    # An explicit abandon removes only the clean checkout; commits stay reachable.
    git notes --ref=refs/notes/task-abandon append -m "Task ${branch} abandoned at $(date -u +%FT%TZ): ${reason}" "$head"
    echo "[abandoned] branch=${branch}; commits retained; reason recorded in refs/notes/task-abandon"
  elif [ -n "$abandon" ]; then
    die "usage: task.sh finish [--abandon <reason>]"
  else
    git merge-base --is-ancestor "$head" "origin/${TARGET_BRANCH}" || die "branch has not merged into origin/${TARGET_BRANCH}; preserve it or explicitly abandon the checkout"
    remote_status=$(git ls-remote --heads origin "refs/heads/${branch}") || die "cannot verify remote task branch; preserve workspace"
    if [ -n "$remote_status" ]; then
      # Refresh its object, then use that exact observation as a deletion lease.
      git fetch -q origin "refs/heads/${branch}" || die "cannot fetch remote task branch; preserve workspace"
      remote_head=$(git rev-parse --verify FETCH_HEAD)
      git merge-base --is-ancestor "$remote_head" "origin/${TARGET_BRANCH}" || die "remote task branch has unmerged work; preserve workspace and remote branch"
    fi
    echo "[verified] ${branch} is included in origin/${TARGET_BRANCH}"
  fi
  # Re-check after fetch. --force only compensates Git's gitlink limitation after all
  # registered-root, owner, lock, recursive dirt and ignored-file checks have passed.
  check_worktree finish
  local -a removal=(worktree remove)
  if git ls-files --stage | grep -q '^160000 '; then
    removal+=(--force)
  fi
  if ! git -C "$mainrepo" "${removal[@]}" "$root"; then
    die "Git refused worktree removal; workspace and branch retained. Owner must inspect the refusal; no rm fallback or additional force level is permitted."
  fi
  cd "$mainrepo"
  if [ "$abandon" = "--abandon" ]; then
    echo "[recycled] worktree removed; local branch=${branch} retained; remote=NOT_RUN"
  elif git branch -d "$branch"; then
    if [ -z "$remote_head" ]; then
      echo "[recycled] worktree and local branch=${branch} removed; remote=ALREADY_ABSENT"
    elif git push -q "--force-with-lease=refs/heads/${branch}:${remote_head}" origin ":refs/heads/${branch}"; then
      echo "[recycled] worktree and local branch=${branch} removed; remote=DELETED observed_head=${remote_head}"
    else
      echo "[partial] local worktree/branch removed; remote=${branch} retained or result unknown; query remote before retrying" >&2
      return 1
    fi
  else
    echo "[partial] worktree removed; local branch=${branch} retained because safe branch deletion was refused; remote=NOT_RUN" >&2
    return 1
  fi
  # Keep card closure separate: its push/PR side effects are not implied by local disposal.
  echo "[next] inspect task-card closure with make task-close in the main checkout when authorized"
}

case "${1:-}" in
  precheck) shift; cmd_precheck "$@" ;;
  start) shift; cmd_start "$@" ;;
  resume) shift; cmd_resume "$@" ;;
  sync) shift; cmd_sync "$@" ;;
  close) shift; cmd_close "$@" ;;
  finish) shift; cmd_finish "$@" ;;
  *) echo "usage: task.sh <precheck|start|resume|sync|close|finish> [args]"; exit 2 ;;
esac