#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""graphctl.py —— 「图模式」的独立实现（2026-10-18；2026-10-19 补批量能力）。

## 它是什么

把目标拆成节点、按依赖推进的**独立**运行模式。**⛔ 不修改任何现有机制**：
不读也不写 `goal.json` / `tasks.json` / `collabd-state.json`，不参与六道闸，
不接管常驻循环，不改变现有会话的任何行为。

## 数据落点（独立目录，与现有状态完全分开）

    <ws>/.workbuddy/graph/<gid>/graph.json     图的唯一真源
    <ws>/.workbuddy/graph/<gid>/events.jsonl    每次状态变更的流水

## 图的结构

    {
      "gid": "20261018-2230-ui改造",
      "title": "给三块功能各加一份文档",
      "created_at": "2026-10-18T22:30:00",
      "meta": {"max_parallel": 3,
               "lease": {"timeout_sec": 3600, "on_timeout": "requeue"},
               "retry": {"max": 0, "delay_sec": 0, "backoff": "fixed", "factor": 2}},
      "nodes": {
        "N1": {"title": "...", "deps": [], "domain": ["docs/ui/"],
               "accepts": ["产物在位"], "status": "pending",
               "evidence": "", "artifacts": [], "attempts": 0,
               "deps_rule": "all_success",
               "retry": {"max": 2, "delay_sec": 30, "backoff": "exponential"},
               "map": {"over": ["a", "b"], "child_domain": "docs/ui/{i}/"}}
      }
    }

`status` 五态：`pending` → `running` → `done` / `blocked`；
另有 `gating`——展开出来的父节点，等子节点全部完成（父节点自动转 `done`）。

## 命令

    init   --ws <工作区> --title <目标> (--kpi "判据A;判据B" | --nodes-json <文件|->)
           [--max-parallel N] [--lease-sec S] [--on-timeout requeue|block|keep]
           [--retry-max N] [--retry-delay S] [--retry-backoff fixed|linear|exponential]
    check  --ws <ws> --gid <gid>          环／悬空依赖／空域／同批域冲突／非法规则
    ready  --ws <ws> --gid <gid>          就绪集（含为什么没被选）；顺带回收超时租约、展开 map
    start  --ws <ws> --gid <gid> --node N1 [--by ...] [--lease-sec S]
    report --ws <ws> --gid <gid> --node N1 --state done|blocked [--evidence "..."] [--artifact P ...]
    rework --ws <ws> --gid <gid> --node N1 [--to 上游] [--reason ...]   回退到上游重做
    add-node    --ws <ws> --gid <gid> --node N9 [--deps A,B] [--domain P] [--accepts C]
    remove-edge --ws <ws> --gid <gid> --from A --to B   删掉「B 依赖 A」这条边
    expand --ws <ws> --gid <gid> --node P [--force]     手动触发展开
    show   --ws <ws> --gid <gid>
    list   --ws <ws>
    tick   --ws <ws> --gid <gid> [--by ...] [--limit N] [--dry-run]   自动派活（算完就开）
    approve --ws <ws> --gid <gid> --node N [--reject] [--reason ...]  人审
    cancel --ws <ws> --gid <gid> (--node N | --all) [--reason ...]     取消
    plan   --ws <ws> --gid <gid> [--scope ...] [--after-sec N]         出一行排期
    progress --ws <ws> --gid <gid>                                    进度／关键路径

## 复杂任务能力（2026-10-19 补，C 方案）

    条件分支：节点 `when: [{"node": "A", "status": "blocked"}]` —— 条件被证伪即
              `skipped`；`on_dep_fail: wait|skip|block` 决定上游跑不成时下游怎么走
              （默认 wait，与旧行为一致）。
    子图：节点 `subgraph: {"nodes": [...]}` —— 内联子流程展开成 `<父>/<子id>`，
          父节点 `gating`，子节点全成功才 `done`，有不成功的 ⇒ 父 `blocked`。
    人审：节点 `approval: true` —— report done 后进 `awaiting`，`approve` 才放行
          （`--reject` ⇒ blocked）。
    取消：`cancelled` 是终态，连坐子节点；下游按 `on_dep_fail` 处置。
    分池：`meta.pools: {"域前缀": 并发上限}` —— 同域并发受限，与 `max_parallel` 叠加。
    进度：`progress` 给出 by_status／percent／关键路径（未完成节点的最长依赖链）。

## 验收判据（accepts）怎么机判（2026-10-19 补）

`report --state done` 时**先按 `accepts` 校验产物与证据**，不满足直接拒收（rc≠0，节点
不置 done，并在 stderr 逐条列出缺什么）。条目两种写法，**纯文本＝描述性判据、不参与机判**：

    "artifact:docs/*.md"                产物里至少一条匹配该通配（反斜杠与 `/` 等价）
    "artifact:>=2"                      产物至少 2 条
    "evidence:测试通过"                 证据里必须出现「测试通过」
    "evidence:全绿,零回归"              多个关键词用 `,` 分隔 ⇒ 全部都要出现（AND）
    "evidence:>=20"                     证据至少 20 个字符
    {"kind": "artifact", "glob": "..."} / {"kind": "artifact", "min": 2}
    {"kind": "evidence", "contains": ["a", "b"]} / {"kind": "evidence", "min": 20}

校验读的是**本次 ＋ 历史**的合并视图（`--artifact` 是追加语义）。

## 回退边（rework_to，2026-10-19 补）

节点写 `rework_to: "上游节点"`（或列表，取第一个）。判不过时用 `rework --node X`：

    ① 目标必须是 X 的**上游**（传递依赖），⛔ 不能是自己或下游；
    ② 目标及其**全部传递下游**复位 `pending`，清租约／完成时刻／驳回原因；
    ③ 复位时把 `evidence` / `artifacts` 挪到 `prev_evidence` / `prev_artifacts` 再清空
       ⇒ 重做之后必须重新交产物（否则验收闸会被旧产物蒙过）；
    ④ 目标 `attempts +1`、全链 `reworks +1`，写一条 `rework` 事件。
    ⑤ `approve --reject` 时若节点带 `rework_to`，自动走同一套回退（人审判不过＝判不过）。
    ⑥ 链上有已展开（`map`／子图）的节点 ⇒ **收回它的子节点并清 `expanded`**，
       下次 `ready`／`tick` 按当时的输入重新展开（⛔ 不留半截子节点）。

## 运行期改图（2026-10-19 补）

    add-node    --node N9 --deps A,B --domain docs/x/ --accepts "artifact:docs/x/a.md"
    remove-edge --from A --to B     删掉「B 依赖 A」
两条都走 `_update`（目录锁 ＋ 唯一临时名 ＋ 原子替换 ＋ `_rev` 回读）⇒ 与并发的
`start`／`report` 互不覆盖；边不存在、节点重复、依赖悬空 ⇒ **报错**，⛔ 不静默空操作。

## 跨图子图（2026-10-19 补）

`subgraph: {"gid": "<同工作区另一张图的 gid>"}` —— 除内联 `{"nodes": [...]}` 外，
可引用 `<ws>/.workbuddy/graph/<gid>/graph.json`，把它的**节点定义**展开成本图的
`<父>/<子id>`，父节点照旧 `gating`、等子节点全部收敛。
    ① 只搬定义（title／deps／domain／accepts／deps_rule／on_dep_fail／when／retry／
       lease_sec／approval／rework_to），⛔ 不搬运行状态（引用即重跑一遍）；
    ② 子图内部依赖与被引用图的 `when`／`rework_to` 引用都加父前缀；
    ③ ⛔ 被引用的图里不允许再有 `map`／`subgraph`（不嵌套），`check` 报硬错；
    ④ 自引用、A→B→A 成环 ⇒ `check` 与展开时都报错。

## 就绪的判据

    ① 依赖按 `deps_rule` 满足（默认 all_success）
    ② 自己还是 pending，且不在重试等待窗内（`not_before` 未到 ⇒ 等）
    ③ 域不与任何 running 节点重叠，也不与本批已选节点重叠
    ④ 不超 max_parallel（running 占名额）

## 三件批量能力（2026-10-19 补）

    租约：start 记 `lease_at` / `lease_at_ts`；ready 时超过 `lease.timeout_sec`
          的 running 节点按 `on_timeout` 处置 —— requeue（默认，回 pending 且
          attempts+1）／block（进 blocked）／keep（只提示不动）。
    重试：`retry.max` 给了才自动重试，report blocked 后 attempts≤max ⇒ 回 pending
          并写 `not_before`（按 backoff 算），超过 ⇒ blocked 且 `retry_exhausted`。
          默认 `max=0` ⇒ 与旧行为一致（report blocked 直接 blocked）。
    展开：`map.over`（建图给列表）或 `map.from`（运行时读上游 artifacts / evidence），
          ready 命中即生成子节点 `P#1..P#N`，父节点转 `gating`，子节点全 done ⇒ 父 done。

## 域的用法

`domain` 是一组路径前缀（相对工作区根）。两节点域重叠 ⇒ 不能同批跑。
判定：任一前缀互为前缀即视为重叠（`docs/` 与 `docs/ui/` 算重叠）。
展开出的子节点**默认不继承父域**（同一批展开通常写同一批文件，继承会把并发挡死）；
需要分片写盘时用 `map.child_domain` 模板（`{i}` / `{item}`）。
"""
from __future__ import annotations

import argparse
import fnmatch
import io
import json
import math
import os
import random
import sys
import time
from pathlib import Path

MARK = ".workbuddy/graph"
LOCK_STALE_SEC = 30.0          # 锁目录超过这么久没动静 ⇒ 认定持锁进程已死，接管
STATUSES = ("pending", "running", "done", "blocked", "gating",
            "awaiting", "skipped", "cancelled")
SETTLED = ("done", "blocked", "skipped", "cancelled")   # 不会再自己变了
DEP_RULES = ("all_success", "all_done", "one_success")
TIMEOUT_POLICIES = ("requeue", "block", "keep")
BACKOFFS = ("fixed", "linear", "exponential")
ON_DEP_FAIL = ("wait", "skip", "block")                 # 上游跑不成时下游怎么办
DEFAULT_LEASE_SEC = 3600.0


# ── 基础设施 ────────────────────────────────────────────────────────────
def _now() -> str:
    return time.strftime("%Y-%m-%dT%H:%M:%S")


def _iso(ts: float) -> str:
    return time.strftime("%Y-%m-%dT%H:%M:%S", time.localtime(ts))


def _parse_ts(v):
    """ISO 字符串 → epoch；失败返回 None（⛔ 不抛，坏数据当作"没有租约"）。"""
    if v in (None, ""):
        return None
    try:
        return float(v)
    except (TypeError, ValueError):
        pass
    for fmt in ("%Y-%m-%dT%H:%M:%S", "%Y-%m-%d %H:%M:%S"):
        try:
            return time.mktime(time.strptime(str(v), fmt))
        except ValueError:
            continue
    return None


def _root(ws: str) -> Path:
    return Path(ws).resolve() / MARK


def _gdir(ws: str, gid: str) -> Path:
    return _root(ws) / gid


def _load(ws: str, gid: str) -> dict:
    p = _gdir(ws, gid) / "graph.json"
    if not p.is_file():
        raise SystemExit("找不到图：%s" % p)
    return json.loads(p.read_text(encoding="utf-8"))


def _save(ws: str, gid: str, g: dict) -> None:
    """整份写回（新建图时用）。临时名带 pid ＋ 随机数 ⇒ 两进程不会撞同一个名字。"""
    p = _gdir(ws, gid) / "graph.json"
    tmp = p.with_suffix(".%d.%d.json.tmp" % (os.getpid(), random.randint(0, 1 << 30)))
    tmp.write_text(json.dumps(g, ensure_ascii=False, indent=2) + "\n",
                   encoding="utf-8", newline="\n")
    os.replace(tmp, p)                       # 原子替换，避免半截文件


class _Lock:
    """写串行化：`os.mkdir` 是原子的，用它当互斥量（⛔ 不用 OS 文件锁，本机会卡死）。

    ⚠️ 2026-10-19 实测：只靠 `_rev` ＋ token 回读核对仍然丢更新 ——
       A 写完回读确认后、B 再覆盖，B 回读看到的也是自己的 token，两边都"成功"。
       那次实测里 4 轮测试抖 1 轮（`pending` != `running`）。所以写必须串行。
    ⚠️ 僵死锁：持锁进程崩了锁目录会留着 ⇒ 超过 `LOCK_STALE_SEC` 直接接管，
       ⛔ 不会永久卡住；等 `wait` 秒仍拿不到则**报错退出**（带手工清理提示）。
    """

    def __init__(self, p: Path, wait: float = 10.0):
        self.p = p
        self.wait = wait
        self.held = False

    def __enter__(self):
        t0 = time.time()
        while True:
            try:
                os.mkdir(self.p)
                self.held = True
                try:
                    (self.p / "owner").write_text(str(os.getpid()), encoding="utf-8")
                except OSError:
                    pass
                return self
            except FileExistsError:
                try:
                    age = time.time() - self.p.stat().st_mtime
                except OSError:
                    age = 0.0
                if age > LOCK_STALE_SEC:
                    for f in ("owner",):
                        try:
                            (self.p / f).unlink()
                        except OSError:
                            pass
                    try:
                        os.rmdir(self.p)
                    except OSError:
                        pass
                    continue
                if time.time() - t0 > self.wait:
                    raise SystemExit(
                        "写锁等待超时：%s（等了 %.0f 秒；确认没有僵死进程后可直接删这个目录）"
                        % (self.p, self.wait))
                time.sleep(0.02)

    def __exit__(self, *exc):
        if self.held:
            try:
                (self.p / "owner").unlink()
            except OSError:
                pass
            try:
                os.rmdir(self.p)
            except OSError:
                pass
        return False


def _update(ws: str, gid: str, mutate, retries: int = 3) -> dict:
    """读-改-写：**先拿目录锁再动文件**，锁内重放变更并原子替换。

    ① 临时名带 pid ＋ 随机数 ⇒ 两进程不会撞同一个名字（早期固定名会 `PermissionError`）。
    ② 写整体串行（`_Lock`）⇒ 不会"后写的整份覆盖前写的"导致节点状态静默消失。
    ③ `_rev` ＋ `_token` 是第二道网：写后回读核对，对不上就重做；
       连续 `retries` 次仍被覆盖则**报错退出**（⛔ 不静默丢状态）。
    ④ Windows 上 `os.replace` 与别的进程的读并发时会短暂 `PermissionError`
       ⇒ 替换动作本身小步重试，⛔ 不把它当成"并发冲突"直接失败。
    """
    p = _gdir(ws, gid) / "graph.json"
    if not p.is_file():
        raise SystemExit("找不到图：%s" % p)
    with _Lock(p.parent / ".lock"):
        for _ in range(retries):
            g = json.loads(p.read_text(encoding="utf-8"))
            rev = int(g.get("_rev") or 0)
            mutate(g)
            token = "%d-%d" % (os.getpid(), random.randint(0, 1 << 30))
            g["_rev"] = rev + 1
            g["_token"] = token
            tmp = p.with_suffix(".%d.%d.json.tmp" % (os.getpid(), random.randint(0, 1 << 30)))
            tmp.write_text(json.dumps(g, ensure_ascii=False, indent=2) + "\n",
                           encoding="utf-8", newline="\n")
            for _try in range(6):                    # 目标被读打开时 replace 会短暂被拒
                try:
                    os.replace(tmp, p)
                    break
                except OSError:
                    time.sleep(0.05)
            else:
                try:
                    tmp.unlink()
                except OSError:
                    pass
                continue
            try:
                back = json.loads(p.read_text(encoding="utf-8"))
            except Exception:                        # noqa: BLE001
                back = {}
            if int(back.get("_rev") or 0) == rev + 1 and back.get("_token") == token:
                return back
        raise SystemExit("并发冲突：%s 连续 %d 次被别的进程覆盖，稍后重试" % (p, retries))


def _event(ws: str, gid: str, obj: dict) -> None:
    p = _gdir(ws, gid) / "events.jsonl"
    obj = dict(obj)
    obj.setdefault("at", _now())
    with io.open(p, "a", encoding="utf-8", newline="\n") as f:
        f.write(json.dumps(obj, ensure_ascii=False) + "\n")


def _out(obj) -> None:
    data = json.dumps(obj, ensure_ascii=False, indent=2) + "\n"
    sys.stdout.buffer.write(data.encode("utf-8"))


# ── 验收判据（accepts 机判）──────────────────────────────────────────────
def _accepts_problem(vals):
    """校验 accepts 语法；有问题返回一句人读的原因，没问题返回 None。"""
    for raw in (vals or []):
        if isinstance(raw, dict):
            kind = str(raw.get("kind") or "").strip()
            if kind not in ("artifact", "evidence"):
                return 'accepts 的对象条目要写 kind=artifact 或 evidence（实际 %r）' % (raw,)
            if kind == "artifact":
                if raw.get("glob") in (None, "") and raw.get("min") in (None, ""):
                    return 'accepts 的 artifact 条目要写 glob 或 min：%r' % (raw,)
                if raw.get("min") not in (None, ""):
                    try:
                        if int(raw["min"]) <= 0:
                            return "accepts 的 min 必须 ≥1：%r" % (raw,)
                    except (TypeError, ValueError):
                        return "accepts 的 min 不是整数：%r" % (raw,)
            else:
                cs = raw.get("contains")
                if cs is not None and not isinstance(cs, list):
                    return 'accepts 的 evidence.contains 要写成列表：%r' % (raw,)
                if not cs and raw.get("min") in (None, ""):
                    return 'accepts 的 evidence 条目要写 contains 或 min：%r' % (raw,)
                if raw.get("min") not in (None, ""):
                    try:
                        if int(raw["min"]) <= 0:
                            return "accepts 的 min 必须 ≥1：%r" % (raw,)
                    except (TypeError, ValueError):
                        return "accepts 的 min 不是整数：%r" % (raw,)
            continue
        if not isinstance(raw, str):
            return "accepts 条目只认字符串或对象（实际 %r）" % (raw,)
        s = raw.strip()
        low = s.lower()
        if not (low.startswith("artifact:") or low.startswith("evidence:")):
            continue                                    # 纯文本 ＝ 描述性判据，不机判
        head, _, arg = s.partition(":")
        arg = arg.strip()
        if not arg:
            return "accepts 条目缺参数：%r（写成 %s:<通配|>=N|关键词>）" % (s, head)
        if arg.startswith(">="):
            try:
                if int(arg[2:]) <= 0:
                    return "accepts 的 >=N 要 ≥1：%r" % s
            except ValueError:
                return "accepts 的 >=N 不是整数：%r" % s
        elif low.startswith("evidence:") and not any(
                x.strip() for x in arg.replace("，", ",").split(",")):
            return "accepts 的 evidence 关键词为空：%r" % s
    return None


def _norm_accepts(vals) -> list:
    p = _accepts_problem(vals)
    if p:
        raise SystemExit(p)
    out = []
    for raw in (vals or []):
        if isinstance(raw, dict):
            kind = str(raw.get("kind")).strip()
            it = {"kind": kind}
            if kind == "artifact":
                if raw.get("glob") not in (None, ""):
                    it["glob"] = str(raw["glob"]).strip()
                if raw.get("min") not in (None, ""):
                    it["min"] = int(raw["min"])
            else:
                if raw.get("contains"):
                    it["contains"] = [str(x) for x in raw["contains"]]
                if raw.get("min") not in (None, ""):
                    it["min"] = int(raw["min"])
            out.append(it)
        else:
            out.append(str(raw).strip())
    return out


def _norm_path(s) -> str:
    return str(s or "").replace("\\", "/").strip()


def _accepts_missing(accepts, artifacts, evidence) -> list:
    """逐条判 accepts，返回没达标的描述（空列表＝全过）。"""
    arts = [_norm_path(x) for x in (artifacts or [])]
    ev = str(evidence or "")
    miss = []
    for raw in (accepts or []):
        if isinstance(raw, dict):
            kind = str(raw.get("kind") or "")
            glob = raw.get("glob")
            mn = raw.get("min")
            need = [str(x) for x in (raw.get("contains") or [])]
        else:
            s = str(raw).strip()
            head, _, arg = s.partition(":")
            low = head.strip().lower()
            arg = arg.strip()
            if low not in ("artifact", "evidence"):
                continue                                # 描述性判据，不机判
            kind = low
            glob = None
            mn = None
            need = []
            if arg.startswith(">="):
                mn = int(arg[2:])
            elif kind == "artifact":
                glob = arg
            else:
                need = [x.strip() for x in arg.replace("，", ",").split(",") if x.strip()]
        if kind == "artifact":
            if glob:
                if not any(fnmatch.fnmatch(a, _norm_path(glob)) for a in arts):
                    miss.append("缺产物 artifact:%s（现有产物：%s）"
                                % (glob, "、".join(arts) if arts else "无"))
            if mn is not None and len(arts) < mn:
                miss.append("产物数量不足 artifact:>=%d（现有 %d 条）" % (mn, len(arts)))
        elif kind == "evidence":
            if mn is not None and len(ev.strip()) < mn:
                miss.append("证据太短 evidence:>=%d（现有 %d 字）" % (mn, len(ev.strip())))
            if need:
                absent = [k for k in need if k not in ev]
                if absent:
                    miss.append("证据缺关键词 evidence:%s（现缺：%s）"
                                % (",".join(need), "、".join(absent)))
    return miss


# ── 回退边（rework_to）──────────────────────────────────────────────────
def _ancestors(nodes: dict, nid: str) -> set:
    seen, stack = set(), list(_deps(nodes.get(nid) or {}))
    while stack:
        x = stack.pop()
        if x in seen or x not in nodes:
            continue
        seen.add(x)
        stack.extend(_deps(nodes[x]))
    return seen


def _descendants(nodes: dict, nid: str) -> set:
    """所有传递下游（不含自己）。"""
    kids = {}
    for k, n in nodes.items():
        for d in _deps(n):
            kids.setdefault(d, []).append(k)
    seen, stack = set(), list(kids.get(nid) or [])
    while stack:
        x = stack.pop()
        if x in seen or x not in nodes:
            continue
        seen.add(x)
        stack.extend(kids.get(x) or [])
    return seen


def _rework_target(n: dict):
    """节点自己的 rework_to（字符串或列表）⇒ 第一个目标 id（可能为空）。"""
    rt = n.get("rework_to")
    if isinstance(rt, (list, tuple)):
        for x in rt:
            if str(x).strip():
                return str(x).strip()
        return ""
    return str(rt or "").strip()


def _drop_subtree(nodes: dict, nid: str) -> list:
    """收回一个已展开节点的全部子节点（展开产物，重新展开时按需重建）。"""
    out, stack = [], list((nodes.get(nid) or {}).get("children") or [])
    while stack:
        c = stack.pop()
        if c not in nodes:
            continue
        out.append(c)
        stack.extend((nodes[c] or {}).get("children") or [])
    for c in out:
        nodes.pop(c, None)
    return out


def _rework_reset(nodes: dict, from_nid: str, tgt: str, reason: str = "") -> dict:
    """把 tgt 及其全部传递下游复位成 pending（调用方保证已通过前置校验）。

    链上有已展开（map／subgraph）的节点 ⇒ **收回它的子节点、清掉 expanded**，
    下次 ready／tick 会按当时的输入重新展开（⛔ 不留半截子节点）。
    """
    down = _descendants(nodes, tgt) | {tgt}
    bad = [x for x in down if str((nodes.get(x) or {}).get("status")) == "running"]
    if bad:
        raise SystemExit("回退链上有正在跑的节点：%s（先 cancel 或等它结束）"
                         % ", ".join(sorted(bad)))
    dropped = []
    for x in sorted(down):
        m = nodes.get(x)
        if m is not None and (m.get("expanded") or str(m.get("status")) == "gating"):
            dropped.extend(_drop_subtree(nodes, x))
    now = _now()
    reset = []
    for x in sorted(down):
        m = nodes.get(x)
        if m is None:                                # 已被当作子节点收回
            continue
        if m.get("artifacts"):
            m["prev_artifacts"] = list(m["artifacts"])
            m["artifacts"] = []
        if m.get("evidence"):
            m["prev_evidence"] = m["evidence"]
            m["evidence"] = ""
        m["status"] = "pending"
        for k in ("lease_at", "lease_at_ts", "lease_sec", "done_at", "awaiting_at",
                  "approved_at", "approved_by", "not_before", "retry_at",
                  "retry_exhausted", "rejected_at", "blocked_by", "blocked_reason",
                  "skipped_at", "skipped_reason", "completed_at",
                  "expanded", "expanded_at", "item_count", "children"):
            m.pop(k, None)
        m["reworked_at"] = now
        m["rework_of"] = tgt
        m["reworks"] = int(m.get("reworks") or 0) + 1
        reset.append(x)
    nodes[tgt]["attempts"] = int(nodes[tgt].get("attempts") or 0) + 1
    nodes[tgt]["rework_from"] = from_nid
    if reason:
        nodes[tgt]["rework_reason"] = reason
    res = {"target": tgt, "reset": reset,
           "attempts": nodes[tgt]["attempts"],
           "reworks": nodes[tgt]["reworks"]}
    if dropped:
        res["dropped_children"] = dropped
    return res


# ── 跨图子图（subgraph.gid）─────────────────────────────────────────────
def _sg_chain(g: dict, nid: str) -> list:
    """从自己往上走 parent 链，收集沿途声明的 subgraph.gid（防跨图成环）。"""
    nodes = g.get("nodes") or {}
    out, seen, cur = [], set(), nid
    while cur and cur in nodes and cur not in seen:
        seen.add(cur)
        sg = (nodes.get(cur) or {}).get("subgraph")
        if isinstance(sg, dict) and str(sg.get("gid") or "").strip():
            out.append(str(sg["gid"]).strip())
        cur = (nodes.get(cur) or {}).get("parent")
    return out


def _sg_specs_from_gid(ws: str, ref_gid: str, chain: list) -> list:
    """读另一张图，把它的节点定义翻成内联子图规格。"""
    if not ws:
        raise SystemExit("内部错误：展开跨图子图时缺工作区路径（gid=%s）" % ref_gid)
    if ref_gid in chain:
        raise SystemExit("子图引用成环：%s" % " → ".join(list(chain) + [ref_gid]))
    p = _gdir(ws, ref_gid) / "graph.json"
    if not p.is_file():
        raise SystemExit("子图引用的图不存在：%s（gid=%s）" % (p, ref_gid))
    sg = json.loads(p.read_text(encoding="utf-8"))
    specs = []
    for sid, sn in (sg.get("nodes") or {}).items():
        if not isinstance(sn, dict):
            continue
        if sn.get("map") or sn.get("subgraph"):
            raise SystemExit("子图 %s 的节点 %s 自己又声明了 map／subgraph ⇒ 不支持嵌套"
                             % (ref_gid, sid))
        specs.append({
            "id": sid,
            "title": sn.get("title") or sid,
            "deps": list(sn.get("deps") or []),
            "domain": _norm_dom(sn.get("domain")),
            "accepts": list(sn.get("accepts") or []),
            "deps_rule": sn.get("deps_rule"),
            "on_dep_fail": sn.get("on_dep_fail"),
            "when": sn.get("when"),
            "retry": sn.get("retry"),
            "lease_sec": sn.get("lease_sec"),
            "approval": sn.get("approval"),
            "rework_to": sn.get("rework_to"),
        })
    return specs


# ── 域与依赖 ────────────────────────────────────────────────────────────
def _norm_dom(d) -> list:
    if isinstance(d, str):
        d = [d]
    out = []
    for x in (d or []):
        s = str(x).strip().replace("\\", "/").lstrip("./")
        if s:
            out.append(s if s.endswith("/") else s + "/")
    return out


def _dom_overlap(a, b) -> bool:
    """任一前缀互为前缀 ⇒ 重叠（docs/ 与 docs/ui/ 算重叠）。"""
    for x in a:
        for y in b:
            if x.startswith(y) or y.startswith(x):
                return True
    return False


def _deps(n: dict) -> list:
    v = n.get("deps") or []
    return [str(x) for x in v] if isinstance(v, list) else []


def _is_done(nodes: dict, nid: str) -> bool:
    return str((nodes.get(nid) or {}).get("status")) == "done"


def _st(nodes: dict, nid: str) -> str:
    return str((nodes.get(nid) or {}).get("status"))


def _dep_verdict(nodes: dict, n: dict) -> dict:
    """依赖判定 ⇒ {"verdict": go|wait|skip|block, "why": 说明}

    ① `when` 条件子句先判（条件分支）：全部成立 ⇒ 继续；任一被证伪 ⇒ skip。
    ② 再按 `deps_rule` 判：all_success（默认）／all_done／one_success。
    ③ 上游停在 skipped / cancelled / blocked 时按 `on_dep_fail` 处置：
       wait（默认，与旧行为一致）／skip（连坐跳过）／block（整枝停住）。
    """
    deps = _deps(n)
    rule = str(n.get("deps_rule") or "all_success")
    on_fail = str(n.get("on_dep_fail") or "wait")
    if on_fail not in ON_DEP_FAIL:
        on_fail = "wait"
    st = {d: _st(nodes, d) for d in deps}

    for c in (n.get("when") or []):
        if not isinstance(c, dict):
            continue
        cnode = str(c.get("node") or "")
        want = str(c.get("status") or "done")
        got = _st(nodes, cnode)
        if got == want:
            continue
        if got in SETTLED:
            return {"verdict": "skip",
                    "why": "条件不成立：%s 是 %s，要 %s" % (cnode, got, want)}
        if not deps:
            return {"verdict": "wait", "why": "条件节点 %s 还没定论（%s）" % (cnode, got)}
    if not deps:
        return {"verdict": "go", "why": ""}

    dead = [(d, s) for d, s in st.items() if s in ("skipped", "cancelled")] \
        or [(d, s) for d, s in st.items() if s == "blocked"]

    if rule == "all_done":
        lack = [d for d, s in st.items() if s not in SETTLED]
        if lack:
            return {"verdict": "wait", "why": "依赖未跑完：%s" % ", ".join(lack)}
        return {"verdict": "go", "why": ""}

    if rule == "one_success":
        if any(s == "done" for s in st.values()):
            return {"verdict": "go", "why": ""}
        if dead and all(s in SETTLED for s in st.values()):
            return {"verdict": on_fail if on_fail != "wait" else "wait",
                    "why": "没有任一上游成功：%s"
                           % ", ".join("%s(%s)" % (d, s) for d, s in st.items())}
        return {"verdict": "wait",
                "why": "等待任一上游成功：%s"
                       % ", ".join("%s(%s)" % (d, s) for d, s in st.items())}

    lack = [d for d, s in st.items() if s != "done"]
    if not lack:
        return {"verdict": "go", "why": ""}
    if dead:
        why = "上游不会成功了：%s" % ", ".join("%s(%s)" % (d, s) for d, s in dead)
        if on_fail != "wait":
            return {"verdict": on_fail, "why": why}
        return {"verdict": "wait",
                "why": "依赖未完成：%s" % ", ".join("%s(%s)" % (d, st[d]) for d in lack)}
    return {"verdict": "wait",
            "why": "依赖未完成：%s" % ", ".join("%s(%s)" % (d, st[d]) for d in lack)}


def _deps_ok(nodes: dict, n: dict):
    """按 `deps_rule` 判依赖是否放行，返回 (bool, 没满足的原因)。"""
    v = _dep_verdict(nodes, n)
    return v["verdict"] == "go", v["why"]


# ── 三件批量能力的配置读法 ──────────────────────────────────────────────
def _meta(g: dict) -> dict:
    m = g.get("meta")
    return m if isinstance(m, dict) else {}


def _lease_cfg(g: dict) -> dict:
    d = _meta(g).get("lease")
    d = d if isinstance(d, dict) else {}
    try:
        sec = float(d.get("timeout_sec", DEFAULT_LEASE_SEC))
    except (TypeError, ValueError):
        sec = DEFAULT_LEASE_SEC
    pol = str(d.get("on_timeout") or "requeue")
    return {"timeout_sec": sec, "on_timeout": pol if pol in TIMEOUT_POLICIES else "requeue"}


def _node_lease_sec(g: dict, n: dict) -> float:
    """节点级 `lease_sec` 优先于全局；0 表示该节点不判超时。"""
    v = n.get("lease_sec")
    if v in (None, ""):
        return _lease_cfg(g)["timeout_sec"]
    try:
        return float(v)
    except (TypeError, ValueError):
        return _lease_cfg(g)["timeout_sec"]


def _retry_cfg(g: dict, n: dict) -> dict:
    d = {}
    for src in (_meta(g).get("retry"), n.get("retry")):
        if isinstance(src, dict):
            d.update(src)
    def _num(k, dv):
        try:
            return float(d.get(k, dv))
        except (TypeError, ValueError):
            return float(dv)
    bk = str(d.get("backoff") or "fixed")
    return {"max": max(0, int(_num("max", 0))),
            "delay_sec": max(0.0, _num("delay_sec", 0)),
            "backoff": bk if bk in BACKOFFS else "fixed",
            "factor": max(1.0, _num("factor", 2))}


def _delay_of(rc: dict, attempts: int) -> float:
    k = max(1, int(attempts))
    if rc["backoff"] == "linear":
        return rc["delay_sec"] * k
    if rc["backoff"] == "exponential":
        return rc["delay_sec"] * (rc["factor"] ** (k - 1))
    return rc["delay_sec"]


# ── 校验 ────────────────────────────────────────────────────────────────
def _find_cycle(nodes: dict) -> list:
    color, stack, hit = {}, [], []

    def dfs(u):
        color[u] = 1
        stack.append(u)
        for v in _deps(nodes.get(u) or {}):
            if v not in nodes:
                continue
            if color.get(v) == 1:
                i = stack.index(v)
                hit.extend(stack[i:] + [v])
                return True
            if color.get(v, 0) == 0 and dfs(v):
                return True
        stack.pop()
        color[u] = 2
        return False

    for k in nodes:
        if color.get(k, 0) == 0 and dfs(k):
            return hit
    return []


def _ref_graph(ws: str, gid: str):
    p = _gdir(ws, gid) / "graph.json"
    if not p.is_file():
        return None
    try:
        return json.loads(p.read_text(encoding="utf-8"))
    except Exception:                                # noqa: BLE001
        return None


def _check_sg_ref(ws: str, chain: list, nid: str, ref: str, errs: list,
                  depth: int = 0) -> list:
    """校验 `subgraph.gid`：存在性／自引用／跨图成环／不许嵌套；返回子图节点规格。"""
    if ref in chain:
        errs.append("%s 的 subgraph 引用成环：%s" % (nid, " → ".join(chain + [ref])))
        return []
    if depth > 6:
        errs.append("%s 的 subgraph 引用链超过 6 层（gid=%s）" % (nid, ref))
        return []
    rg = _ref_graph(ws, ref)
    if rg is None:
        errs.append("%s 的 subgraph 引用的图不存在：gid=%s（%s）"
                    % (nid, ref, _gdir(ws, ref) / "graph.json"))
        return []
    rnodes = {k: v for k, v in (rg.get("nodes") or {}).items() if isinstance(v, dict)}
    out = []
    for sid, sn in rnodes.items():
        if sn.get("map") or sn.get("subgraph"):
            errs.append("%s 引用的图 %s 里节点 %s 又声明了 map／subgraph ⇒ 不支持嵌套"
                        % (nid, ref, sid))
        out.append({"id": sid, "deps": [str(x) for x in (sn.get("deps") or [])]})
    for sid, sn in rnodes.items():
        sub2 = sn.get("subgraph")
        g2 = str((sub2 or {}).get("gid") or "").strip() if isinstance(sub2, dict) else ""
        if g2:
            _check_sg_ref(ws, chain + [ref], "%s/%s" % (nid, sid), g2, errs, depth + 1)
    return out


def cmd_check(a) -> int:
    g = _load(a.ws, a.gid)
    nodes = g.get("nodes") or {}
    errs, warns = [], []

    cyc = _find_cycle(nodes)
    if cyc:
        errs.append("存在环：%s" % " → ".join(cyc))

    for nid, n in nodes.items():
        for d in _deps(n):
            if d not in nodes:
                errs.append("%s 的依赖 %s 不存在" % (nid, d))
        if str(n.get("deps_rule") or "all_success") not in DEP_RULES:
            errs.append("%s 的 deps_rule 非法：%r（只认 %s）"
                        % (nid, n.get("deps_rule"), " / ".join(DEP_RULES)))
        m = n.get("map")
        if m is not None:
            if not isinstance(m, dict) or not ("over" in m or "from" in m):
                errs.append("%s 的 map 需要 over（建图给列表）或 from（运行时读上游）" % nid)
            else:
                src = (m.get("from") or {}).get("node") if isinstance(m.get("from"), dict) else None
                if src and src not in nodes:
                    errs.append("%s 的 map.from.node %s 不存在" % (nid, src))
                elif src and src not in _deps(n):
                    warns.append("%s 的展开源 %s 不在 deps 里 ⇒ 上游没完成时会被当成"
                                 "「展开源未就绪」空等" % (nid, src))
        if n.get("map") and n.get("subgraph"):
            errs.append("%s 同时声明了 map 与 subgraph（只能选一个）" % nid)
        sg = n.get("subgraph")
        if sg is not None:
            kids = sg.get("nodes") if isinstance(sg, dict) else None
            ref = str((sg or {}).get("gid") or "").strip() if isinstance(sg, dict) else ""
            if isinstance(kids, list) and ref:
                errs.append("%s 的 subgraph 同时给了 nodes 与 gid（只能选一种）" % nid)
            if not isinstance(kids, list) and not ref:
                errs.append('%s 的 subgraph 要写 {"nodes": [...]} 或 {"gid": "..."}' % nid)
                kids = []
            if ref:
                kids = _check_sg_ref(a.ws, [a.gid], nid, ref, errs)
                extra = [s["id"] for s in kids]
                for s in kids:
                    for d in s["deps"]:
                        if d not in extra:
                            errs.append("%s 引用的图 %s 里 %s 依赖 %s 不在那张图里"
                                        % (nid, ref, s["id"], d))
            seen = set()
            for s in kids:
                sid = str((s or {}).get("id") or "")
                if not sid:
                    warns.append("%s 的子图节点缺 id ⇒ 会按顺序补 S1/S2，deps 引用会指不到"
                                 % nid)
                elif sid in seen:
                    errs.append("%s 的子图里有重复 id：%s" % (nid, sid))
                else:
                    seen.add(sid)
            for s in kids:
                for d in ((s or {}).get("deps") or []):
                    if str(d) not in seen and str(d) not in nodes:
                        errs.append("%s/%s 的依赖 %s 既不在子图里也不在图里"
                                    % (nid, (s or {}).get("id") or "?", d))
        if str(n.get("on_dep_fail") or "wait") not in ON_DEP_FAIL:
            errs.append("%s 的 on_dep_fail 非法：%r（只认 %s）"
                        % (nid, n.get("on_dep_fail"), " / ".join(ON_DEP_FAIL)))
        for c in (n.get("when") or []):
            if not isinstance(c, dict) or not str(c.get("node") or ""):
                errs.append('%s 的 when 子句要写 {"node": "A", "status": "done"}' % nid)
                continue
            if str(c["node"]) not in nodes:
                errs.append("%s 的 when 条件节点 %s 不存在" % (nid, c["node"]))
            if str(c.get("status") or "done") not in STATUSES:
                errs.append("%s 的 when 期望状态非法：%r" % (nid, c.get("status")))
        if n.get("expanded"):
            for cid in (n.get("children") or []):
                if cid not in nodes:
                    errs.append("%s 的子节点 %s 不见了（图被手改过？）" % (nid, cid))
        if not _norm_dom(n.get("domain")) and not n.get("parent"):
            warns.append("%s 没有声明域 ⇒ 域比较视为不冲突，可与任意节点同批；"
                         "保守做法是让它单独跑" % nid)
        if str(n.get("status")) not in STATUSES:
            errs.append("%s 的状态非法：%r" % (nid, n.get("status")))
        ap = _accepts_problem(n.get("accepts"))
        if ap:
            errs.append("%s：%s" % (nid, ap))
        rt = _rework_target(n)
        if rt:
            if rt not in nodes:
                errs.append("%s 的 rework_to 指向不存在的节点：%s" % (nid, rt))
            elif rt == nid:
                errs.append("%s 的 rework_to 指向自己" % nid)
            elif rt not in _ancestors(nodes, nid):
                errs.append("%s 的 rework_to %s 不是它的上游（回退只能回到上游）"
                            % (nid, rt))
        if not (n.get("accepts") or []) and not n.get("map") and not n.get("parent"):
            warns.append("%s 没有验收判据 ⇒ 判不出完成" % nid)

    pools = _meta(g).get("pools")
    if pools is not None:
        if not isinstance(pools, dict):
            errs.append('meta.pools 要写成 {"域前缀": 并发上限}')
        else:
            doms = [(_norm_dom(n.get("domain")), nid) for nid, n in nodes.items()]
            for k, v in pools.items():
                try:
                    cap = int(v)
                except (TypeError, ValueError):
                    errs.append("meta.pools[%s] 不是数字：%r" % (k, v))
                    continue
                if cap <= 0:
                    errs.append("meta.pools[%s] 必须是正整数" % k)
                pre = _norm_dom(k)
                if not pre:
                    errs.append("meta.pools 的域不能为空")
                elif not any(d and _dom_overlap(pre, d) for d, _n in doms):
                    warns.append("域池 %s 没有匹配任何节点的域" % k)

    ids = list(nodes)
    for i in range(len(ids)):
        for j in range(i + 1, len(ids)):
            a1, a2 = ids[i], ids[j]
            if _norm_dom(nodes[a1].get("domain")) and \
               _dom_overlap(_norm_dom(nodes[a1].get("domain")),
                            _norm_dom(nodes[a2].get("domain"))):
                warns.append("%s 与 %s 的域重叠 ⇒ 永不同批" % (a1, a2))

    _out({"ok": not errs, "errors": errs, "warnings": warns,
          "nodes": len(nodes)})
    return 0 if not errs else 1


# ── 租约超时回收 ────────────────────────────────────────────────────────
def _lease_over(g: dict, n: dict, now: float):
    """超时则返回超时秒数，否则 None。没有租约时刻 ⇒ 不判超时（兼容手改的旧图）。"""
    if str(n.get("status")) != "running":
        return None
    sec = _node_lease_sec(g, n)
    if sec <= 0:
        return None
    ts = _parse_ts(n.get("lease_at_ts"))
    if ts is None:
        ts = _parse_ts(n.get("lease_at"))
    if ts is None:
        return None
    over = now - ts - sec
    return over if over > 0 else None


def _reclaim_leases(g: dict, acts: list) -> int:
    nodes = g.get("nodes") or {}
    lc = _lease_cfg(g)
    now = time.time()
    changed = 0
    for nid, n in list(nodes.items()):
        over = _lease_over(g, n, now)
        if over is None:
            continue
        pol = str(n.get("on_timeout") or lc["on_timeout"])
        if pol == "keep":
            continue                              # 只提示，不动（notice 由外层补）
        n["attempts"] = int(n.get("attempts") or 0) + 1
        n["reclaimed_at"] = _now()
        n["reclaim_count"] = int(n.get("reclaim_count") or 0) + 1
        for k in ("lease_at", "lease_at_ts", "lease_sec"):
            n.pop(k, None)
        if pol == "block":
            n["status"] = "blocked"
            n["blocked_by"] = "lease_timeout"
        else:
            n["status"] = "pending"
        acts.append({"node": nid, "event": "lease_timeout", "to": n["status"],
                     "over_sec": int(over), "attempts": n["attempts"],
                     "policy": pol})
        changed += 1
    return changed


def _lease_notices(g: dict) -> list:
    lc = _lease_cfg(g)
    if lc["on_timeout"] != "keep":
        return []
    now = time.time()
    out = []
    for nid, n in (g.get("nodes") or {}).items():
        over = _lease_over(g, n, now)
        if over is not None:
            out.append({"node": nid, "over_sec": int(over),
                        "why": "租约超时但策略为 keep（只提示，不回收）"})
    return out


# ── 动态展开（map / foreach）─────────────────────────────────────────────
def _as_text(x) -> str:
    if isinstance(x, (dict, list)):
        return json.dumps(x, ensure_ascii=False)
    return str(x)


def _parse_list(v) -> list:
    """证据/产物 → 列表。JSON 数组优先，否则按行与分号切。"""
    if isinstance(v, list):
        return list(v)
    s = str(v or "").strip()
    if not s:
        return []
    if s[0] in "[(":
        try:
            got = json.loads(s)
            if isinstance(got, list):
                return list(got)
        except Exception:                          # noqa: BLE001
            pass
    out = []
    for line in s.replace("\r\n", "\n").replace("；", "\n").replace(";", "\n").split("\n"):
        t = line.strip().lstrip("-*").strip()
        if t:
            out.append(t)
    return out


def _map_items(g: dict, nodes: dict, nid: str):
    """取展开项；源还没就绪 ⇒ None（区别于空列表 = N=0）。"""
    n = nodes.get(nid) or {}
    m = n.get("map")
    if not isinstance(m, dict):
        return None
    if "over" in m:
        items = list(m.get("over") or [])
    else:
        f = m.get("from") or {}
        up = nodes.get(str(f.get("node") or ""))
        if not up or str(up.get("status")) != "done":
            return None
        pick = str(f.get("pick") or "artifacts")
        if pick == "evidence":
            items = _parse_list(up.get("evidence"))
        elif pick == "children":
            items = list(up.get("children") or [])
        else:
            items = list(up.get("artifacts") or [])
    cap = int(m.get("max_items") or 0)
    if cap > 0:
        items = items[:cap]
    return items


def _child_domain(m: dict, i: int, item) -> list:
    cd = m.get("child_domain")
    if not cd:
        return []
    if isinstance(cd, str):
        cd = [cd]
    out = []
    for x in cd:
        s = str(x).replace("{i}", str(i)).replace("{item}", _as_text(item))
        out.append(s)
    return _norm_dom(out)


def _expand_one(g: dict, nodes: dict, nid: str, items: list) -> dict:
    n = nodes[nid]
    if items and int((n.get("map") or {}).get("max_items") or 0) > 0:
        items = items[:int((n.get("map") or {}).get("max_items"))]
    n["expanded"] = True
    n["expanded_at"] = _now()
    n["item_count"] = len(items)
    if not items:                            # N=0 ⇒ 无需执行，父节点直接完成
        n["status"] = "done"
        n["children"] = []
        n["evidence"] = n.get("evidence") or "展开 0 项，无需执行"
        return {"node": nid, "event": "expand", "count": 0, "children": [],
                "to": "done"}
    kids = []
    for i, it in enumerate(items, 1):
        cid = "%s#%d" % (nid, i)
        if cid in nodes:
            raise SystemExit("子节点 id 已被占用：%s（父节点 %s）" % (cid, nid))
        title = "%s[%d]" % (str(n.get("title") or nid), i)
        if not isinstance(it, (dict, list)):
            title = "%s %s" % (title, str(it)[:40])
        nodes[cid] = {
            "title": title,
            "deps": _deps(n),
            "domain": _child_domain(n.get("map") or {}, i, it),
            "accepts": list(n.get("accepts") or []),
            "status": "pending", "evidence": "", "artifacts": [], "attempts": 0,
            "parent": nid, "index": i, "item": it,
        }
        kids.append(cid)
    n["status"] = "gating"
    n["children"] = kids
    return {"node": nid, "event": "expand", "count": len(kids), "children": kids,
            "to": "gating"}


def _expand_maps(g: dict, acts: list) -> int:
    nodes = g.get("nodes") or {}
    changed = 0
    for nid, n in list(nodes.items()):
        st = str(n.get("status"))
        if st not in ("pending", "blocked") or n.get("expanded") or not n.get("map"):
            continue
        if st == "blocked":
            continue                  # 失败节点不自动展开，等人工 start/重试
        okd, _why = _deps_ok(nodes, n)
        if not okd:
            continue
        items = _map_items(g, nodes, nid)
        if items is None:
            continue
        acts.append(_expand_one(g, nodes, nid, items))
        changed += 1
    return changed


def _complete_parents(g: dict, acts: list) -> int:
    nodes = g.get("nodes") or {}
    changed = 0
    for nid, n in list(nodes.items()):
        if str(n.get("status")) != "gating":
            continue
        kids = [c for c in (n.get("children") or []) if c in nodes]
        if not kids or not all(_st(nodes, c) in SETTLED for c in kids):
            continue
        arts = []
        for c in kids:
            arts.extend(list((nodes.get(c) or {}).get("artifacts") or []))
        if arts:
            n["artifacts"] = arts
        if all(_is_done(nodes, c) for c in kids):
            n["status"] = "done"
            n["completed_at"] = _now()
            n["evidence"] = n.get("evidence") or ("展开 %d 项全部完成" % len(kids))
            acts.append({"node": nid, "event": "children_done", "to": "done",
                         "count": len(kids)})
        else:                       # 子节点全定下来了，但不全成功 ⇒ 父节点不算成功
            bad = ["%s(%s)" % (c, _st(nodes, c)) for c in kids if not _is_done(nodes, c)]
            n["status"] = "blocked"
            n["blocked_by"] = "child_failed"
            n["blocked_reason"] = "子节点未全部成功：%s" % ", ".join(bad)
            acts.append({"node": nid, "event": "children_failed", "to": "blocked",
                         "count": len(kids), "bad": bad})
        changed += 1
    return changed


# ── 条件分支（when / on_dep_fail）───────────────────────────────────────
def _apply_conditions(g: dict, acts: list) -> int:
    """把「条件不成立 ⇒ skipped」「上游跑不成且要求 block ⇒ blocked」落到状态上。"""
    nodes = g.get("nodes") or {}
    changed = 0
    for nid, n in list(nodes.items()):
        if str(n.get("status")) != "pending":
            continue
        if n.get("map") and not n.get("expanded"):
            continue
        if n.get("subgraph") and not n.get("expanded"):
            continue
        v = _dep_verdict(nodes, n)
        if v["verdict"] == "skip":
            n["status"] = "skipped"
            n["skipped_at"] = _now()
            n["skipped_reason"] = v["why"]
            acts.append({"node": nid, "event": "skip", "to": "skipped",
                         "why": v["why"]})
            changed += 1
        elif v["verdict"] == "block":
            n["status"] = "blocked"
            n["blocked_by"] = "dep"
            n["blocked_reason"] = v["why"]
            acts.append({"node": nid, "event": "block", "to": "blocked",
                         "why": v["why"]})
            changed += 1
    return changed


# ── 子图（节点内部再拆子流程）───────────────────────────────────────────
def _expand_subgraphs(g: dict, acts: list, ws: str = "") -> int:
    nodes = g.get("nodes") or {}
    changed = 0
    for nid, n in list(nodes.items()):
        if str(n.get("status")) != "pending" or n.get("expanded") or not n.get("subgraph"):
            continue
        if not _deps_ok(nodes, n)[0]:
            continue
        acts.append(_expand_subgraph(g, nodes, nid, ws))
        changed += 1
    return changed


def _expand_subgraph(g: dict, nodes: dict, nid: str, ws: str = "") -> dict:
    """子图 ⇒ 子节点 `<父>/<子id>`，父节点转 gating，子节点全成功才 done。

    `subgraph.nodes` 内联；`subgraph.gid` 引用同工作区另一张图的节点定义。
    """
    n = nodes[nid]
    sub = n.get("subgraph") or {}
    ref_gid = str(sub.get("gid") or "").strip()
    if ref_gid:
        if ref_gid == str(g.get("gid") or ""):
            raise SystemExit("子图引用了当前图自己：%s" % ref_gid)
        par = n.get("parent")
        chain = list(reversed(_sg_chain(g, par))) if par else []
        specs = _sg_specs_from_gid(ws, ref_gid, chain)
        n["subgraph_ref"] = ref_gid
    else:
        specs = [s for s in (sub.get("nodes") or []) if isinstance(s, dict)]
    prefix = nid + "/"
    local, kids = {}, []
    for i, s in enumerate(specs, 1):
        raw = str(s.get("id") or ("S%d" % i)).strip()
        cid = prefix + raw
        if cid in nodes:
            raise SystemExit("子图节点 id 已被占用：%s" % cid)
        local[raw] = cid
        kids.append((cid, s))
    n["expanded"] = True
    n["expanded_at"] = _now()
    if not kids:                                    # 空子图 ⇒ 无需执行
        n["status"] = "done"
        n["children"] = []
        n["evidence"] = n.get("evidence") or "子图为空，无需执行"
        return {"node": nid, "event": "expand", "kind": "subgraph", "count": 0, "to": "done"}
    base = _norm_dom(n.get("domain")) or _norm_dom(sub.get("child_domain"))
    outer = _deps(n)
    for cid, s in kids:
        inner = []
        for d in (s.get("deps") or []):
            tgt = local.get(str(d)) or str(d)
            if tgt not in inner:
                inner.append(tgt)
        deps = list(outer) + [d for d in inner if d not in outer]
        dom = _norm_dom(s.get("domain"))
        if not dom:
            cd = sub.get("child_domain")
            dom = _norm_dom(str(cd).replace("{id}", cid[len(prefix):])) if cd else list(base)
        kid = {"title": str(s.get("title") or cid), "deps": deps, "domain": dom,
               "accepts": _norm_accepts(s.get("accepts") or []),
               "status": "pending", "evidence": "", "artifacts": [],
               "attempts": 0, "parent": nid, "sub": True}
        for k in ("deps_rule", "on_dep_fail", "approval", "lease_sec"):
            if s.get(k) not in (None, "", []):
                kid[k] = s[k]
        # `when` / `rework_to` 里的节点引用要跟着加父前缀，否则指向不存在的 id
        if s.get("when"):
            kid["when"] = [{"node": local.get(str(c.get("node")), str(c.get("node"))),
                            "status": str(c.get("status") or "done")}
                           for c in s["when"] if isinstance(c, dict)]
        rt = _rework_target(s)
        if rt:
            kid["rework_to"] = local.get(rt, rt)
        if s.get("retry"):
            kid["retry"] = _retry_cfg({"meta": {}}, {"retry": s["retry"]})
        if ref_gid:
            kid["origin_graph"] = ref_gid
        nodes[cid] = kid
    n["status"] = "gating"
    n["children"] = [c for c, _ in kids]
    return {"node": nid, "event": "expand", "kind": "subgraph",
            "count": len(kids), "children": n["children"], "to": "gating",
            **({"from_graph": ref_gid} if ref_gid else {})}


# ── 按域分池 ────────────────────────────────────────────────────────────
def _pool_caps(g: dict) -> list:
    p = _meta(g).get("pools")
    out = []
    if isinstance(p, dict):
        for k, v in p.items():
            try:
                cap = int(v)
            except (TypeError, ValueError):
                continue
            dom = _norm_dom(k)
            if cap > 0 and dom:
                out.append((dom[0], cap))
    return out


def _pool_of(g: dict, n: dict) -> list:
    dom = _norm_dom((n or {}).get("domain"))
    if not dom:
        return []
    return [pre for pre, _c in _pool_caps(g) if _dom_overlap(dom, [pre])]


def _pool_full(g: dict, n: dict, occupied: list) -> dict:
    """节点所在池是否已满；满了返回 {"pool","cap","used"}，否则 {}。"""
    caps = dict(_pool_caps(g))
    for pre in _pool_of(g, n):
        cap = caps.get(pre) or 0
        if cap <= 0:
            continue
        used = sum(1 for x in occupied if pre in _pool_of(g, x))
        if used >= cap:
            return {"pool": pre, "cap": cap, "used": used}
    return {}


def _advance(g: dict, ws: str = "") -> list:
    """把「超时回收／子节点收敛／展开／条件判定」推到不动点；返回动了哪些（供写事件）。"""
    acts: list = []
    for _ in range(6):
        moved = 0
        moved += _reclaim_leases(g, acts)
        moved += _complete_parents(g, acts)
        moved += _expand_maps(g, acts)
        moved += _expand_subgraphs(g, acts, ws)
        moved += _apply_conditions(g, acts)
        if not moved:
            break
    return acts


def _maybe_advance(g: dict) -> bool:
    """便宜的预判：没有可推进的事就不写盘（保持 ready 的只读语义）。"""
    nodes = g.get("nodes") or {}
    lc = _lease_cfg(g)
    now = time.time()
    if lc["on_timeout"] != "keep" and lc["timeout_sec"] > 0:
        for n in nodes.values():
            if _lease_over(g, n, now) is not None:
                return True
    for nid, n in nodes.items():
        st = str(n.get("status"))
        if st == "gating":
            kids = [c for c in (n.get("children") or []) if c in nodes]
            if kids and all(_st(nodes, c) in SETTLED for c in kids):
                return True
        elif st == "pending":
            if n.get("expanded"):
                continue
            if n.get("map"):
                if _deps_ok(nodes, n)[0] and _map_items(g, nodes, nid) is not None:
                    return True
                continue
            if n.get("subgraph"):
                if _deps_ok(nodes, n)[0]:
                    return True
                continue
            v = _dep_verdict(nodes, n)
            if v["verdict"] in ("skip", "block"):
                return True
    return False


def _advance_graph(ws: str, gid: str, g: dict):
    acts: list = []
    if not _maybe_advance(g):
        return g, acts

    def _mut(gg):
        acts.extend(_advance(gg, ws))

    g2 = _update(ws, gid, _mut)
    for x in acts:
        _event(ws, gid, x)
    return g2, acts


# ── 就绪集 ──────────────────────────────────────────────────────────────
def _ready(g: dict) -> dict:
    nodes = g.get("nodes") or {}
    cap = int(_meta(g).get("max_parallel") or 3)
    running = [k for k, n in nodes.items() if str(n.get("status")) == "running"]
    ready, waiting = [], []
    now = time.time()

    for nid, n in nodes.items():
        st = str(n.get("status"))
        if st == "gating":
            kids = [c for c in (n.get("children") or []) if c in nodes]
            left = [c for c in kids if not _is_done(nodes, c)]
            waiting.append({"node": nid, "why": "等待 %d 个子节点完成（还剩 %d）"
                            % (len(kids), len(left))})
            continue
        if st != "pending":
            continue
        if n.get("map") and not n.get("expanded"):
            waiting.append({"node": nid, "why": "展开源未就绪（上游没完成或没有产物）"})
            continue
        nb = n.get("not_before")
        if nb not in (None, ""):
            try:
                left = float(nb) - now
            except (TypeError, ValueError):
                left = 0
            if left > 0:
                waiting.append({"node": nid, "why": "重试等待中：还需 %d 秒"
                                % int(math.ceil(left))})
                continue
        okd, why = _deps_ok(nodes, n)
        if not okd:
            waiting.append({"node": nid, "why": why})
            continue
        dom = _norm_dom(n.get("domain"))
        clash = [r for r in running
                 if dom and _norm_dom((nodes.get(r) or {}).get("domain"))
                 and _dom_overlap(dom, _norm_dom((nodes.get(r) or {}).get("domain")))]
        if clash:
            waiting.append({"node": nid, "why": "域与在跑的冲突：%s" % ", ".join(clash)})
            continue
        pf = _pool_full(g, n, [nodes.get(r) or {} for r in running])
        if pf:
            waiting.append({"node": nid, "why": "域池 %s 已满（%d/%d）"
                            % (pf["pool"], pf["used"], pf["cap"])})
            continue
        ready.append(nid)

    slots = max(0, cap - len(running))
    picked, backlog = [], []
    for nid in ready:
        if len(picked) >= slots:
            backlog.append(nid)
            waiting.append({"node": nid, "why": "并发上限 %d 已占满" % cap})
            continue
        dom = _norm_dom((nodes.get(nid) or {}).get("domain"))
        clash = [p for p in picked
                 if dom and _norm_dom((nodes.get(p) or {}).get("domain"))
                 and _dom_overlap(dom, _norm_dom((nodes.get(p) or {}).get("domain")))]
        if clash:
            # 同批也不能撞域：check 已警告「永不同批」，ready 必须兑现
            waiting.append({"node": nid, "why": "域与本批已选节点重叠：%s" % ", ".join(clash)})
            continue
        pf = _pool_full(g, nodes.get(nid) or {},
                        [nodes.get(r) or {} for r in running] +
                        [nodes.get(p) or {} for p in picked])
        if pf:
            waiting.append({"node": nid, "why": "域池 %s 已满（%d/%d）"
                            % (pf["pool"], pf["used"], pf["cap"])})
            continue
        picked.append(nid)

    awaiting = [k for k, n in nodes.items() if str(n.get("status")) == "awaiting"]
    return {"gid": g.get("gid"), "running": running, "ready": picked,
            "backlog": backlog, "waiting": waiting, "awaiting": awaiting,
            "pools": dict(_pool_caps(g)),
            "cap": cap, "slots": slots}


def cmd_ready(a) -> int:
    g = _load(a.ws, a.gid)
    g, acts = _advance_graph(a.ws, a.gid, g)
    r = _ready(g)
    r["reclaimed"] = [x for x in acts if x.get("event") == "lease_timeout"]
    r["expanded"] = [x for x in acts if x.get("event") == "expand"]
    r["completed_parents"] = [x["node"] for x in acts if x.get("event") == "children_done"]
    r["lease_notices"] = _lease_notices(g)
    _out(r)
    return 0


# ── 状态流转 ────────────────────────────────────────────────────────────
def cmd_start(a) -> int:
    def _mut(g):
        n = (g.get("nodes") or {}).get(a.node)
        if not n:
            raise SystemExit("没有这个节点：%s" % a.node)
        st = str(n.get("status"))
        if st == "running":
            raise SystemExit("节点 %s 已在跑，不能重复开工" % a.node)
        if st == "done":
            raise SystemExit("节点 %s 已完成，不能开工" % a.node)
        if st == "gating" or (n.get("map") and not n.get("expanded")):
            raise SystemExit("节点 %s 是展开节点，不能直接开工（由 ready 展开后跑子节点）"
                             % a.node)
        # pending 与 blocked 都可开工：blocked 是「这轮没过」，重试时 attempts 保留
        n["status"] = "running"
        now = time.time()
        n["lease_at"] = _iso(now)
        n["lease_at_ts"] = now
        if a.lease_sec is not None:
            n["lease_sec"] = float(a.lease_sec)
        n["starts"] = int(n.get("starts") or 0) + 1
        n.pop("not_before", None)
        n.pop("retry_at", None)
    g = _update(a.ws, a.gid, _mut)
    _event(a.ws, a.gid, {"node": a.node, "to": "running", "by": a.by or ""})
    n = (g.get("nodes") or {}).get(a.node) or {}
    _out({"ok": True, "node": a.node, "status": "running",
          "lease_sec": _node_lease_sec(g, n)})
    return 0


def cmd_report(a) -> int:
    if a.state not in ("done", "blocked"):
        raise SystemExit("--state 只认 done / blocked")
    retry_info = {}

    def _mut(g):
        n = (g.get("nodes") or {}).get(a.node)
        if not n:
            raise SystemExit("没有这个节点：%s" % a.node)
        if n.get("map") or str(n.get("status")) == "gating":
            raise SystemExit("节点 %s 是展开父节点，本身不回报（子节点全完成自动 done）"
                             % a.node)
        if a.evidence:
            n["evidence"] = a.evidence
        for art in (a.artifact or []):
            n.setdefault("artifacts", []).append(str(art))
        if a.state == "done":                       # F1：报 done 先过验收判据
            gaps = _accepts_missing(n.get("accepts"), n.get("artifacts"), n.get("evidence"))
            if gaps:
                raise SystemExit("节点 %s 验收不通过（不置 done）：\n  - %s\n"
                                 "补齐产物／证据后重新 report（accepts 不可绕过）"
                                 % (a.node, "\n  - ".join(gaps)))
            n["accepts_checked_at"] = _now()
            n["accepts_gaps"] = []
        for k in ("lease_at", "lease_at_ts", "lease_sec"):
            n.pop(k, None)
        if a.state == "blocked":
            n["attempts"] = int(n.get("attempts") or 0) + 1
            n["blocked_by"] = "report"
            rc = _retry_cfg(g, n)
            left = rc["max"] - n["attempts"] + 1     # 还能再试几次
            if rc["max"] > 0 and n["attempts"] <= rc["max"]:
                delay = _delay_of(rc, n["attempts"])
                at = time.time() + delay
                n["status"] = "pending"
                n["not_before"] = at
                n["retry_at"] = _iso(at)
                n["retry_exhausted"] = False
                retry_info.update({"policy_max": rc["max"], "attempts": n["attempts"],
                                   "requeued": True, "delay_sec": delay,
                                   "retry_at": n["retry_at"],
                                   "retries_left": max(0, left - 1)})
            else:
                n["status"] = "blocked"
                n["retry_exhausted"] = rc["max"] > 0
                n.pop("not_before", None)
                n.pop("retry_at", None)
                retry_info.update({"policy_max": rc["max"], "attempts": n["attempts"],
                                   "requeued": False, "retry_at": None,
                                   "exhausted": True})
        else:
            n.pop("not_before", None)
            n.pop("retry_at", None)
            if n.get("approval") and not n.get("approved_at"):
                n["status"] = "awaiting"          # 跑完了，等人审过目
                n["awaiting_at"] = _now()
            else:
                n["status"] = "done"
                n["done_at"] = _now()

    g = _update(a.ws, a.gid, _mut)
    final = _st(g.get("nodes") or {}, a.node)
    _event(a.ws, a.gid, {"node": a.node,
                         "to": final if final == "awaiting"
                         else (a.state if a.state == "done" else "blocked"),
                         "evidence": a.evidence or "", "by": a.by or "",
                         "artifacts": list(a.artifact or [])})
    g, acts = _advance_graph(a.ws, a.gid, g)
    r = _ready(g)
    _out({"ok": True, "node": a.node,
          "status": str((g.get("nodes") or {}).get(a.node, {}).get("status")),
          "next_ready": r["ready"],
          "retry": retry_info or None,
          "completed_parents": [x["node"] for x in acts
                                if x.get("event") == "children_done"]})
    return 0


def cmd_expand(a) -> int:
    acts = []

    def _mut(g):
        nodes = g.get("nodes") or {}
        n = nodes.get(a.node)
        if not n:
            raise SystemExit("没有这个节点：%s" % a.node)
        if not n.get("map"):
            raise SystemExit("节点 %s 没有 map 声明，无可展开" % a.node)
        if n.get("expanded"):
            raise SystemExit("节点 %s 已展开过（children=%s）"
                             % (a.node, n.get("children")))
        okd, why = _deps_ok(nodes, n)
        if not okd and not a.force:
            raise SystemExit("展开源未就绪：%s（要强制展开加 --force）" % why)
        items = _map_items(g, nodes, a.node)
        if items is None:
            raise SystemExit("展开源未就绪：上游节点没完成或没有产物")
        acts.append(_expand_one(g, nodes, a.node, items))

    g = _update(a.ws, a.gid, _mut)
    for x in acts:
        _event(a.ws, a.gid, x)
    g, more = _advance_graph(a.ws, a.gid, g)
    acts.extend(more)
    n = (g.get("nodes") or {}).get(a.node) or {}
    _out({"ok": True, "node": a.node, "status": n.get("status"),
          "children": n.get("children") or [],
          "count": len(n.get("children") or [])})
    return 0


# ── 人审 / 取消 / 派活 / 排期 / 进度 ─────────────────────────────────────
def cmd_approve(a) -> int:
    """人审节点：`awaiting` ⇒ done（默认）或 blocked（--reject）。

    驳回时若节点带 `rework_to` ⇒ 直接走回退（人审判不过 ＝ 判不过）。
    """
    rw = {}

    def _mut(g):
        nodes = g.get("nodes") or {}
        n = nodes.get(a.node)
        if not n:
            raise SystemExit("没有这个节点：%s" % a.node)
        st = str(n.get("status"))
        if st != "awaiting":
            raise SystemExit("节点 %s 不在等人审（当前 %s）" % (a.node, st))
        if a.reject:
            tgt = _rework_target(n)
            if tgt:
                if tgt not in nodes:
                    raise SystemExit("回退目标不存在：%s" % tgt)
                if tgt not in _ancestors(nodes, a.node):
                    raise SystemExit("回退目标 %s 不是 %s 的上游" % (tgt, a.node))
                n["status"] = "blocked"
                n["blocked_by"] = "rejected"
                n["blocked_reason"] = a.reason or "人审驳回"
                n["rejected_at"] = _now()
                rw.update(_rework_reset(nodes, a.node, tgt, a.reason or "人审驳回"))
                rw["auto"] = True
                return
            n["status"] = "blocked"
            n["blocked_by"] = "rejected"
            n["blocked_reason"] = a.reason or "人审驳回"
            n["rejected_at"] = _now()
        else:
            n["status"] = "done"
            n["done_at"] = _now()
            n["approved_at"] = _now()
            n["approved_by"] = a.by or "user"

    g = _update(a.ws, a.gid, _mut)
    st = _st(g.get("nodes") or {}, a.node)
    _event(a.ws, a.gid, {"node": a.node, "to": st, "by": a.by or "",
                         "reject": bool(a.reject), "reason": a.reason or "",
                         **({"rework": rw} if rw else {})})
    g, _acts = _advance_graph(a.ws, a.gid, g)
    r = _ready(g)
    _out({"ok": True, "node": a.node, "status": _st(g.get("nodes") or {}, a.node),
          "next_ready": r["ready"], "rework": rw or None})
    return 0


def cmd_cancel(a) -> int:
    """取消节点（连坐它的子节点）；`--all` 取消整图。"""
    if not a.node and not a.all:
        raise SystemExit("要给 --node <节点> 或 --all")
    hit: list = []

    def _mut(g):
        nodes = g.get("nodes") or {}
        if a.node and a.node not in nodes:
            raise SystemExit("没有这个节点：%s" % a.node)
        stack = [a.node] if a.node else list(nodes)
        while stack:
            nid = stack.pop()
            n = nodes.get(nid)
            if not n or str(n.get("status")) in ("done", "cancelled"):
                continue
            n["status"] = "cancelled"
            n["cancelled_at"] = _now()
            if a.by:
                n["cancelled_by"] = a.by
            if a.reason:
                n["cancel_reason"] = a.reason
            hit.append(nid)
            stack.extend(n.get("children") or [])

    g = _update(a.ws, a.gid, _mut)
    for nid in hit:
        _event(a.ws, a.gid, {"node": nid, "to": "cancelled",
                             "by": a.by or "", "reason": a.reason or ""})
    g, acts = _advance_graph(a.ws, a.gid, g)
    r = _ready(g)
    _out({"ok": True, "cancelled": hit,
          "skipped_by_cancel": [x["node"] for x in acts if x.get("event") == "skip"],
          "next_ready": r["ready"]})
    return 0


def cmd_rework(a) -> int:
    """回退到上游重做：目标及其全部传递下游复位 pending，记 attempts／reworks 与事件。"""
    res = {}

    def _mut(g):
        nodes = g.get("nodes") or {}
        n = nodes.get(a.node)
        if not n:
            raise SystemExit("没有这个节点：%s" % a.node)
        tgt = str(a.to or "").strip() or _rework_target(n)
        if not tgt:
            raise SystemExit("节点 %s 没有 rework_to，也没给 --to" % a.node)
        if tgt not in nodes:
            raise SystemExit("回退目标不存在：%s" % tgt)
        if tgt == a.node:
            raise SystemExit("回退目标不能是自己（要重做自己直接 start 该节点）")
        if tgt not in _ancestors(nodes, a.node):
            raise SystemExit("回退目标 %s 不是 %s 的上游（回退只能回到上游）"
                             % (tgt, a.node))
        res.update(_rework_reset(nodes, a.node, tgt, a.reason or ""))
        res["node"] = a.node

    g = _update(a.ws, a.gid, _mut)
    _event(a.ws, a.gid, {"event": "rework", "node": a.node, "to": res.get("target"),
                         "reset": res.get("reset") or [], "reason": a.reason or "",
                         "by": a.by or "", "attempts": res.get("attempts"),
                         "reworks": res.get("reworks")})
    g, acts = _advance_graph(a.ws, a.gid, g)
    r = _ready(g)
    _out({"ok": True, "node": a.node, "target": res.get("target"),
          "reset": res.get("reset") or [],
          "dropped_children": res.get("dropped_children") or [],
          "attempts": res.get("attempts"),
          "reworks": res.get("reworks"),
          "skipped_by_rework": [x["node"] for x in acts if x.get("event") == "skip"],
          "next_ready": r["ready"]})
    return 0


def cmd_add_node(a) -> int:
    """运行期加节点（与并发的 start／report 共用同一把目录锁，不会互相覆盖）。"""
    nid = str(a.node or "").strip()
    if not nid:
        raise SystemExit("--node 不能为空")
    deps = [x.strip() for x in str(a.deps or "").replace("，", ",").split(",") if x.strip()]
    rule = str(a.deps_rule or "all_success")
    if rule not in DEP_RULES:
        raise SystemExit("--deps-rule 只认 %s" % " / ".join(DEP_RULES))
    accepts = _norm_accepts(a.accepts or [])
    rework_to = str(a.rework_to or "").strip()

    def _mut(g):
        nodes = g.get("nodes") or {}
        if nid in nodes:
            raise SystemExit("节点已存在：%s（换一个 id 或先 remove-edge）" % nid)
        miss = [d for d in deps if d not in nodes]
        if miss:
            raise SystemExit("依赖不存在：%s" % ", ".join(miss))
        if rework_to and rework_to not in nodes:
            raise SystemExit("rework_to 指向的节点不存在：%s" % rework_to)
        if rework_to == nid:
            raise SystemExit("rework_to 不能指向自己")
        nodes[nid] = {
            "title": str(a.title or nid), "deps": deps,
            "domain": _norm_dom(a.domain or []), "accepts": accepts,
            "status": "pending", "evidence": "", "artifacts": [], "attempts": 0,
            "deps_rule": rule, "added_at": _now(),
        }
        if rework_to:
            nodes[nid]["rework_to"] = rework_to
        if a.approval:
            nodes[nid]["approval"] = True
        g["nodes"] = nodes

    g = _update(a.ws, a.gid, _mut)
    _event(a.ws, a.gid, {"event": "add_node", "node": nid, "deps": deps,
                         "by": a.by or "", "rev": g.get("_rev")})
    g, _acts = _advance_graph(a.ws, a.gid, g)
    r = _ready(g)
    _out({"ok": True, "node": nid, "deps": deps,
          "status": _st(g.get("nodes") or {}, nid),
          "rev": g.get("_rev"), "next_ready": r["ready"]})
    return 0


def cmd_remove_edge(a) -> int:
    """删边：删掉「--to 依赖 --from」这一条依赖（边不存在即报错，⛔ 不静默空操作）。"""
    src, dst = str(a.src or "").strip(), str(a.to or "").strip()
    if not src or not dst:
        raise SystemExit("要给 --from <上游> 和 --to <下游>")

    def _mut(g):
        nodes = g.get("nodes") or {}
        for x in (src, dst):
            if x not in nodes:
                raise SystemExit("没有这个节点：%s" % x)
        d = _deps(nodes[dst])
        if src not in d:
            raise SystemExit("边不存在：%s → %s（%s 的 deps=%s 里没有 %s）"
                             % (src, dst, dst, d, src))
        nodes[dst]["deps"] = [x for x in d if x != src]
        nodes[dst]["edge_removed_at"] = _now()

    g = _update(a.ws, a.gid, _mut)
    _event(a.ws, a.gid, {"event": "remove_edge", "from": src, "to": dst,
                         "by": a.by or "", "rev": g.get("_rev")})
    g, _acts = _advance_graph(a.ws, a.gid, g)
    r = _ready(g)
    _out({"ok": True, "from": src, "to": dst, "deps": _deps(
        (g.get("nodes") or {}).get(dst) or {}), "rev": g.get("_rev"),
        "next_ready": r["ready"]})
    return 0


def cmd_tick(a) -> int:
    """自动派活：推进到不动点 → 算就绪集 → 直接把就绪节点开成 running。"""
    started, missed = [], []
    g = _load(a.ws, a.gid)
    g, acts = _advance_graph(a.ws, a.gid, g)
    r = _ready(g)
    cand = list(r["ready"])
    if a.limit:
        cand = cand[:int(a.limit)]
    if cand and not a.dry_run:
        def _mut(gg):
            nodes = gg.get("nodes") or {}
            for nid in cand:
                n = nodes.get(nid)
                if not n or str(n.get("status")) != "pending":
                    missed.append(nid)
                    continue
                if _dep_verdict(nodes, n)["verdict"] != "go":
                    missed.append(nid)
                    continue
                now = time.time()
                n["status"] = "running"
                n["lease_at"] = _iso(now)
                n["lease_at_ts"] = now
                if a.lease_sec is not None:
                    n["lease_sec"] = float(a.lease_sec)
                n["starts"] = int(n.get("starts") or 0) + 1
                n.pop("not_before", None)
                n.pop("retry_at", None)
                n["started_by"] = a.by or "tick"
                started.append(nid)

        g = _update(a.ws, a.gid, _mut)
        for nid in started:
            _event(a.ws, a.gid, {"node": nid, "to": "running", "by": a.by or "tick"})
        g, more = _advance_graph(a.ws, a.gid, g)
        acts.extend(more)
    r2 = _ready(g)
    _out({"gid": a.gid, "started": started, "missed": missed,
          "dry_run": bool(a.dry_run), "advanced": acts,
          "ready_now": r2["ready"], "running": r2["running"],
          "awaiting": r2["awaiting"], "cap": r2["cap"], "slots": r2["slots"]})
    return 0


def cmd_plan(a) -> int:
    """出一行排期（四条硬规则已按规范形态写好），⛔ 不写宿主库。"""
    ws = str(Path(a.ws).resolve()).replace("\\", "/")
    g = _load(a.ws, a.gid)
    r = _ready(g)
    after = 240 if a.after_sec is None else int(a.after_sec)
    at_ms = int((time.time() + after) * 1000)
    scope = a.scope or (ws.rstrip("/").rsplit("/", 1)[-1] + "/")
    row = {
        "name": "[图模式派活]-%s-%s" % (a.gid, time.strftime("%Y%m%d-%H%M")),
        "prompt": ("跑一次图模式派活：python %s tick --ws %s --gid %s --by tick；"
                   "本轮只做这一件事，做完即停。"
                   % (Path(__file__).resolve(), ws, a.gid)),
        "cwds": ws,
        "workspace_scope": scope,
        "next_run_at": at_ms,
        "scheduled_at": time.strftime("%Y-%m-%dT%H:%M:%S", time.localtime(at_ms / 1000.0)),
    }
    _out({"ok": True, "gid": a.gid, "rows": [row],
          "ready": r["ready"], "running": r["running"],
          "rules": {"cwds": "正斜杠绝对路径", "workspace_scope": "线名/",
                    "next_run_at": "毫秒 epoch", "scheduled_at": "ISO 本地时间"},
          "note": "只产出行，⛔ 不写宿主库（图模式零侵入）"})
    return 0


def _remaining_chain(nodes: dict) -> list:
    """未完成节点之间的最长依赖链（关键路径）。"""
    todo = {k: v for k, v in nodes.items()
            if str(v.get("status")) not in ("done", "skipped", "cancelled")}
    memo = {}

    def best(nid):
        if nid in memo:
            return memo[nid]
        memo[nid] = [nid]
        cand = [nid]
        for d in _deps(todo[nid]):
            if d in todo:
                chain = best(d) + [nid]
                if len(chain) > len(cand):
                    cand = chain
        memo[nid] = cand
        return cand

    out: list = []
    for nid in todo:
        c = best(nid)
        if len(c) > len(out):
            out = c
    return out


def cmd_progress(a) -> int:
    g = _load(a.ws, a.gid)
    g, acts = _advance_graph(a.ws, a.gid, g)
    nodes = g.get("nodes") or {}
    cnt: dict = {}
    for n in nodes.values():
        s = str(n.get("status"))
        cnt[s] = cnt.get(s, 0) + 1
    active = len(nodes) - cnt.get("cancelled", 0) - cnt.get("skipped", 0)
    done = cnt.get("done", 0)
    percent = round(100.0 * done / active, 1) if active else 100.0
    r = _ready(g)
    cp = _remaining_chain(nodes)
    _out({"gid": g.get("gid"), "title": g.get("title"), "total": len(nodes),
          "by_status": cnt, "active": active, "done": done, "percent": percent,
          "running": r["running"], "ready": r["ready"], "awaiting": r["awaiting"],
          "blocked": [k for k, n in nodes.items() if str(n.get("status")) == "blocked"],
          "skipped": [k for k, n in nodes.items() if str(n.get("status")) == "skipped"],
          "cancelled": [k for k, n in nodes.items() if str(n.get("status")) == "cancelled"],
          "critical_path": cp, "critical_len": len(cp),
          "advanced": acts})
    return 0


# ── 建图 ────────────────────────────────────────────────────────────────
def _gid_of(title: str) -> str:
    safe = "".join(c for c in title if c not in '\\/:*?"<>|\r\n\t')[:24].strip()
    return "%s-%s" % (time.strftime("%Y%m%d-%H%M"), safe or "graph")


def _norm_map(m) -> dict:
    if not isinstance(m, dict):
        raise SystemExit("map 必须是对象")
    out = {}
    if "over" in m:
        if not isinstance(m["over"], list):
            raise SystemExit("map.over 必须是列表")
        out["over"] = list(m["over"])
    if "from" in m:
        f = m["from"]
        if not isinstance(f, dict) or not str(f.get("node") or "").strip():
            raise SystemExit('map.from 需要 {"node": "上游节点"} 形态')
        out["from"] = {"node": str(f["node"]).strip(),
                       "pick": str(f.get("pick") or "artifacts")}
    if not out:
        raise SystemExit("map 需要 over（建图给列表）或 from（运行时读上游）")
    if m.get("child_domain"):
        out["child_domain"] = m["child_domain"]
    if m.get("max_items"):
        out["max_items"] = int(m["max_items"])
    if m.get("as"):
        out["as"] = str(m["as"])
    return out


def cmd_init(a) -> int:
    if a.nodes_json:
        raw = sys.stdin.read() if a.nodes_json == "-" else \
            Path(a.nodes_json).read_text(encoding="utf-8")
        spec = json.loads(raw)
    elif a.kpi:
        spec = {"nodes": [
            {"id": "N%d" % (i + 1), "title": k.strip(), "deps": [],
             "domain": [], "accepts": [k.strip()]}
            for i, k in enumerate([x for x in a.kpi.replace("；", ";").split(";") if x.strip()])
        ]}
    else:
        raise SystemExit("要给 --kpi 或 --nodes-json")

    if a.on_timeout not in TIMEOUT_POLICIES:
        raise SystemExit("--on-timeout 只认 %s" % " / ".join(TIMEOUT_POLICIES))
    if a.retry_backoff not in BACKOFFS:
        raise SystemExit("--retry-backoff 只认 %s" % " / ".join(BACKOFFS))

    nodes = {}
    for i, n in enumerate(spec.get("nodes") or []):
        raw = n.get("id")
        nid = str(raw).strip() if raw not in (None, "") else ""
        if not nid:
            k = i + 1
            while ("N%d" % k) in nodes:      # 自动编号要避开已占用的 id
                k += 1
            nid = "N%d" % k
        if nid in nodes:                     # 显式重复 ⇒ 硬错，⛔ 不静默覆盖前一个
            raise SystemExit("节点 id 重复：%s" % nid)
        rule = str(n.get("deps_rule") or a.deps_rule or "all_success")
        if rule not in DEP_RULES:
            raise SystemExit("%s 的 deps_rule 非法：%r（只认 %s）"
                             % (nid, rule, " / ".join(DEP_RULES)))
        nodes[nid] = {
            "title": str(n.get("title") or nid),
            "deps": [str(x) for x in (n.get("deps") or [])],
            "domain": _norm_dom(n.get("domain")),
            "accepts": _norm_accepts(n.get("accepts") or []),
            "status": "pending", "evidence": "", "artifacts": [], "attempts": 0,
            "deps_rule": rule,
        }
        if n.get("retry"):
            if not isinstance(n["retry"], dict):
                raise SystemExit("%s 的 retry 必须是对象" % nid)
            nodes[nid]["retry"] = _retry_cfg({"meta": {}}, {"retry": n["retry"]})
        if n.get("lease_sec") not in (None, ""):
            nodes[nid]["lease_sec"] = float(n["lease_sec"])
        if n.get("on_timeout"):
            if str(n["on_timeout"]) not in TIMEOUT_POLICIES:
                raise SystemExit("%s 的 on_timeout 非法：%r" % (nid, n["on_timeout"]))
            nodes[nid]["on_timeout"] = str(n["on_timeout"])
        if n.get("map"):
            nodes[nid]["map"] = _norm_map(n["map"])
        if n.get("subgraph"):
            sg = n["subgraph"]
            if not isinstance(sg, dict):
                raise SystemExit('%s 的 subgraph 要写 {"nodes": [...]} 或 {"gid": "另一张图"}'
                                 % nid)
            has_nodes = isinstance(sg.get("nodes"), list)
            has_gid = bool(str(sg.get("gid") or "").strip())
            if has_nodes and has_gid:
                raise SystemExit("%s 的 subgraph 只能选一种：内联 nodes 或引用 gid" % nid)
            if not has_nodes and not has_gid:
                raise SystemExit('%s 的 subgraph 要写 {"nodes": [...]} 或 {"gid": "..."}'
                                 % nid)
            if n.get("map"):
                raise SystemExit("%s 同时声明了 map 与 subgraph（只能选一个）" % nid)
            sub = {}
            if has_nodes:
                sub["nodes"] = [dict(s) for s in sg["nodes"] if isinstance(s, dict)]
            else:
                sub["gid"] = str(sg["gid"]).strip()
            if sg.get("child_domain"):
                sub["child_domain"] = str(sg["child_domain"])
            nodes[nid]["subgraph"] = sub
        if n.get("rework_to"):
            rt = _rework_target({"rework_to": n["rework_to"]})
            if not rt:
                raise SystemExit("%s 的 rework_to 不能为空" % nid)
            if rt == nid:
                raise SystemExit("%s 的 rework_to 不能指向自己" % nid)
            nodes[nid]["rework_to"] = rt
        if n.get("when"):
            if not isinstance(n["when"], list):
                raise SystemExit("%s 的 when 必须是列表" % nid)
            clauses = []
            for c in n["when"]:
                if not isinstance(c, dict) or not str(c.get("node") or "").strip():
                    raise SystemExit('%s 的 when 子句要写 {"node": "A", "status": "done"}'
                                     % nid)
                clauses.append({"node": str(c["node"]).strip(),
                                "status": str(c.get("status") or "done")})
            nodes[nid]["when"] = clauses
        if n.get("on_dep_fail"):
            if str(n["on_dep_fail"]) not in ON_DEP_FAIL:
                raise SystemExit("%s 的 on_dep_fail 非法：%r（只认 %s）"
                                 % (nid, n["on_dep_fail"], " / ".join(ON_DEP_FAIL)))
            nodes[nid]["on_dep_fail"] = str(n["on_dep_fail"])
        if n.get("approval"):
            nodes[nid]["approval"] = True
    gid = a.gid or _gid_of(a.title)
    g = {"gid": gid, "title": a.title, "created_at": _now(),
         "meta": {"max_parallel": int(spec.get("max_parallel") or a.max_parallel or 3),
                  "lease": {"timeout_sec": float(a.lease_sec) if a.lease_sec is not None
                            else DEFAULT_LEASE_SEC,
                            "on_timeout": a.on_timeout},
                  "retry": {"max": int(a.retry_max or 0),
                            "delay_sec": float(a.retry_delay or 0),
                            "backoff": a.retry_backoff,
                            "factor": float(a.retry_factor or 2)}},
         "nodes": nodes}
    d = _gdir(a.ws, gid)
    pools = {}
    if isinstance(spec.get("pools"), dict):
        pools.update(spec["pools"])
    for item in (a.pool or []):
        s = str(item)
        if "=" not in s:
            raise SystemExit("--pool 要写成 域前缀=上限（如 docs/ui/=1）")
        k, v = s.split("=", 1)
        pools[k.strip()] = v
    if pools:
        g["meta"]["pools"] = {}
        for k, v in pools.items():
            dom = _norm_dom(k)
            if not dom:
                raise SystemExit("域池的域不能为空")
            try:
                cap = int(v)
            except (TypeError, ValueError):
                raise SystemExit("域池上限不是整数：%s=%r" % (k, v))
            if cap <= 0:
                raise SystemExit("域池上限必须 ≥1：%s=%r" % (k, v))
            g["meta"]["pools"][dom[0]] = cap
    d.mkdir(parents=True, exist_ok=True)
    _save(a.ws, gid, g)
    _event(a.ws, gid, {"event": "init", "nodes": list(nodes)})
    _out({"ok": True, "gid": gid, "dir": str(d), "nodes": len(nodes),
          "note": "独立图：⛔ 不参与现有机制（不写 goal.json / tasks.json）"})
    return 0


def cmd_show(a) -> int:
    _out(_load(a.ws, a.gid))
    return 0


def cmd_list(a) -> int:
    root = _root(a.ws)
    rows = []
    if root.is_dir():
        for d in sorted(root.iterdir()):
            p = d / "graph.json"
            if not p.is_file():
                continue
            try:
                g = json.loads(p.read_text(encoding="utf-8"))
            except Exception:
                continue
            nodes = g.get("nodes") or {}
            cnt = {}
            for n in nodes.values():
                cnt[str(n.get("status"))] = cnt.get(str(n.get("status")), 0) + 1
            rows.append({"gid": g.get("gid"), "title": g.get("title"),
                         "nodes": len(nodes), "by_status": cnt,
                         "created_at": g.get("created_at")})
    _out({"ws": str(Path(a.ws).resolve()), "graphs": rows})
    return 0


# ── 入口 ────────────────────────────────────────────────────────────────
def main(argv=None) -> int:
    ap = argparse.ArgumentParser(prog="graphctl", description="图模式独立实现（不碰现有机制）")
    sub = ap.add_subparsers(dest="cmd", required=True)

    p = sub.add_parser("init", help="按判据或节点定义建图")
    p.add_argument("--ws", required=True)
    p.add_argument("--title", required=True)
    p.add_argument("--gid", default="")
    p.add_argument("--kpi", default="", help="判据，分号分隔；每条生成一个节点")
    p.add_argument("--nodes-json", default="", help="节点定义文件（- 表示标准输入）")
    p.add_argument("--max-parallel", type=int, default=3)
    p.add_argument("--lease-sec", type=float, default=None,
                   help="租约多少秒算超时（默认 3600；0 = 不判超时）")
    p.add_argument("--on-timeout", default="requeue",
                   help="超时处置：requeue（默认）／block／keep")
    p.add_argument("--retry-max", type=int, default=0, help="默认自动重试次数（默认 0）")
    p.add_argument("--retry-delay", type=float, default=0, help="重试基础间隔秒（默认 0）")
    p.add_argument("--retry-backoff", default="fixed", help="fixed（默认）／linear／exponential")
    p.add_argument("--retry-factor", type=float, default=2, help="指数退避倍数（默认 2）")
    p.add_argument("--deps-rule", default="all_success",
                   help="默认依赖规则：all_success（默认）／all_done／one_success")
    p.add_argument("--pool", action="append", default=[],
                   help="按域分池：域前缀=并发上限，可重复（如 docs/ui/=1）")
    p.set_defaults(fn=cmd_init)

    for name, fn in (("check", cmd_check), ("ready", cmd_ready), ("show", cmd_show)):
        p = sub.add_parser(name)
        p.add_argument("--ws", required=True)
        p.add_argument("--gid", required=True)
        p.set_defaults(fn=fn)

    p = sub.add_parser("start", help="节点开工（记租约）")
    p.add_argument("--ws", required=True)
    p.add_argument("--gid", required=True)
    p.add_argument("--node", required=True)
    p.add_argument("--by", default="")
    p.add_argument("--lease-sec", type=float, default=None, help="本次开工的租约秒数（覆盖默认）")
    p.set_defaults(fn=cmd_start)

    p = sub.add_parser("report", help="节点回报")
    p.add_argument("--ws", required=True)
    p.add_argument("--gid", required=True)
    p.add_argument("--node", required=True)
    p.add_argument("--state", required=True)
    p.add_argument("--evidence", default="")
    p.add_argument("--artifact", action="append", default=[],
                   help="产物清单，可重复（供 map.from pick=artifacts 读取）")
    p.add_argument("--by", default="")
    p.set_defaults(fn=cmd_report)

    p = sub.add_parser("rework", help="回退到上游重做（目标及其下游复位 pending）")
    p.add_argument("--ws", required=True)
    p.add_argument("--gid", required=True)
    p.add_argument("--node", required=True)
    p.add_argument("--to", default="", help="回退目标（默认取节点自己的 rework_to）")
    p.add_argument("--reason", default="")
    p.add_argument("--by", default="")
    p.set_defaults(fn=cmd_rework)

    p = sub.add_parser("add-node", help="运行期加节点")
    p.add_argument("--ws", required=True)
    p.add_argument("--gid", required=True)
    p.add_argument("--node", required=True)
    p.add_argument("--title", default="")
    p.add_argument("--deps", default="", help="依赖节点，逗号分隔")
    p.add_argument("--domain", action="append", default=[], help="域前缀，可重复")
    p.add_argument("--accepts", action="append", default=[],
                   help="验收判据，可重复（artifact:… / evidence:… / 纯文本）")
    p.add_argument("--deps-rule", default="all_success")
    p.add_argument("--rework-to", default="")
    p.add_argument("--approval", action="store_true")
    p.add_argument("--by", default="")
    p.set_defaults(fn=cmd_add_node)

    p = sub.add_parser("remove-edge", help="删边：删掉「--to 依赖 --from」")
    p.add_argument("--ws", required=True)
    p.add_argument("--gid", required=True)
    p.add_argument("--from", dest="src", required=True, help="上游节点")
    p.add_argument("--to", required=True, help="下游节点（它的 deps 里删掉上游）")
    p.add_argument("--by", default="")
    p.set_defaults(fn=cmd_remove_edge)

    p = sub.add_parser("expand", help="手动触发展开")
    p.add_argument("--ws", required=True)
    p.add_argument("--gid", required=True)
    p.add_argument("--node", required=True)
    p.add_argument("--force", action="store_true")
    p.set_defaults(fn=cmd_expand)

    p = sub.add_parser("approve", help="人审通过／驳回（awaiting ⇒ done／blocked）")
    p.add_argument("--ws", required=True)
    p.add_argument("--gid", required=True)
    p.add_argument("--node", required=True)
    p.add_argument("--by", default="")
    p.add_argument("--reject", action="store_true")
    p.add_argument("--reason", default="")
    p.set_defaults(fn=cmd_approve)

    p = sub.add_parser("cancel", help="取消节点（连坐子节点）或整图")
    p.add_argument("--ws", required=True)
    p.add_argument("--gid", required=True)
    p.add_argument("--node", default="")
    p.add_argument("--all", action="store_true")
    p.add_argument("--by", default="")
    p.add_argument("--reason", default="")
    p.set_defaults(fn=cmd_cancel)

    p = sub.add_parser("tick", help="自动派活：算就绪集并直接开工")
    p.add_argument("--ws", required=True)
    p.add_argument("--gid", required=True)
    p.add_argument("--by", default="tick")
    p.add_argument("--limit", type=int, default=0, help="本次最多开几个（默认不额外限）")
    p.add_argument("--dry-run", action="store_true", help="只算不开")
    p.add_argument("--lease-sec", type=float, default=None)
    p.set_defaults(fn=cmd_tick)

    p = sub.add_parser("plan", help="出一行排期（四条硬规则已规范化）")
    p.add_argument("--ws", required=True)
    p.add_argument("--gid", required=True)
    p.add_argument("--scope", default="", help="workspace_scope，默认取工作区目录名")
    p.add_argument("--after-sec", type=int, default=None, help="多久后触发（默认 240 秒）")
    p.set_defaults(fn=cmd_plan)

    p = sub.add_parser("progress", help="进度与关键路径")
    p.add_argument("--ws", required=True)
    p.add_argument("--gid", required=True)
    p.set_defaults(fn=cmd_progress)

    p = sub.add_parser("list")
    p.add_argument("--ws", required=True)
    p.set_defaults(fn=cmd_list)

    a = ap.parse_args(argv)
    return a.fn(a)


if __name__ == "__main__":
    sys.exit(main())