Merge pull request 'internal/workflow：統一型別宣告，修復 main 編譯失敗（#21）' (#23) from fix/issue21-workflow-types into main

Reviewed-on: #23

README.md

@@ -11,12 +11,47 @@ teai 是 Gitea 的命令列（CLI）工具，以更完整、更可靠的方式
 
 ## 安裝與建置
 
-需要 Go 1.26 以上。
+### 需求
+
+- **Go 1.26 以上**（`go version` 確認；本倉庫僅用標準庫，離線可建置）
+- **git**
+- Gitea 帳號的 **API token**（設定階段使用；在 Gitea「設定 → 應用程式」產生）
+
+### 從原始碼建置
 
 ```sh
+git clone https://gitea.alterminal.com/alterminal/teai.git
+cd teai
 go build -o teai ./cmd/teai
+install -Dm755 teai ~/.local/bin/teai   # 或複製到任何 PATH 內目錄
+teai version                             # 驗證：teai version 0.1.0-dev
 ```
 
+也可以直接裝進 `GOBIN`（預設 `~/go/bin`；該目錄已在 PATH 時最省事）：
+
+```sh
+go install ./cmd/teai
+```
+
+> **注意：** `go install gitea.alterminal.com/alterminal/teai/cmd/teai@latest` 目前**不可用**——
+> module 尚未發佈任何 tag，`@latest` 會解析到任意中繼 commit（且 #21 修復前 main 建置失敗）。
+> 請在 clone 目錄內以版本控制的方式建置；發佈 tag 後再提供 `teai@<version>` 安裝路徑。
+
+### 登入設定（首次使用）
+
+teai 與 `tea` 共用同一份組態檔；若 `tea whoami` 已可正常輸出，可跳過本節。
+
+```sh
+teai login add --url https://gitea.alterminal.com
+# 未給 --token 時自 stdin 讀一行：貼上 token 後按 Enter（不會進 shell 歷史）
+teai whoami    # 驗證：應輸出 {"username":"<你的帳號>"}
+```
+
+- token 驗證失敗（HTTP 401）不會寫入組態，結束碼 3。
+- 組態檔：`--config`／`TEA_CONFIG` 指定，預設 `~/.config/tea/config.yml`；teai 採行級編輯，
+  不會改壞 tea 也在使用的欄位，檔案權限 `0600`。
+- 多站台以 `--name` 區分、`teai login default <名稱>` 切換預設；詳見下方 [`teai login`](#teai-login--管理登入) 一節。
+
 ## 指令設計
 
 > 工作流規則的唯一來源是 [`alterminal/agents`](https://gitea.alterminal.com/alterminal/agents) 的 `AGENTS.md`；

cmd/xcheck/main.go

@@ -0,0 +1,294 @@
+// cmd/xcheck 是 #7 的交叉驗證工具（不屬於 teai 本體，PR 內附驗證說明）。
+//
+// 以真實 Gitea API 資料源實作 workflow.Source，跑 Go 版 ScanStalled，
+// 再與 gitea.py stalled（行為基準）的 JSON 輸出逐欄位比對。
+// 建立限制：與 teai 本體一致，僅標準庫。
+package main
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"os"
+	"strings"
+	"time"
+
+	"gitea.alterminal.com/alterminal/teai/internal/workflow"
+)
+
+// apiSource 以 Gitea API 實作 workflow.Source。
+type apiSource struct {
+	base  string
+	token string
+	hc    *http.Client
+}
+
+func (s *apiSource) get(path string, params map[string]string) ([]byte, int, error) {
+	u := s.base + path
+	if len(params) > 0 {
+		q := url.Values{}
+		for k, v := range params {
+			q.Set(k, v)
+		}
+		u += "?" + q.Encode()
+	}
+	req, err := http.NewRequest("GET", u, nil)
+	if err != nil {
+		return nil, 0, err
+	}
+	req.Header.Set("Accept", "application/json")
+	req.Header.Set("Authorization", "token "+s.token)
+	resp, err := s.hc.Do(req)
+	if err != nil {
+		return nil, 0, err
+	}
+	defer resp.Body.Close()
+	body, err := io.ReadAll(resp.Body)
+	return body, resp.StatusCode, err
+}
+
+func (s *apiSource) getJSON(path string, params map[string]string, out any) error {
+	body, code, err := s.get(path, params)
+	if err != nil {
+		return err
+	}
+	if code != 200 {
+		return fmt.Errorf("GET %s: HTTP %d", path, code)
+	}
+	return json.Unmarshal(body, out)
+}
+
+// listAll 分頁拉取清單類 API（Gitea 上限 50/頁）。
+func (s *apiSource) listAll(path string, params map[string]string, out any) error {
+	var items []json.RawMessage
+	page := 1
+	for {
+		q := map[string]string{"page": fmt.Sprint(page), "limit": "50"}
+		for k, v := range params {
+			q[k] = v
+		}
+		var chunk json.RawMessage
+		if err := s.getJSON(path, q, &chunk); err != nil {
+			return err
+		}
+		var arr []json.RawMessage
+		if err := json.Unmarshal(chunk, &arr); err != nil {
+			return fmt.Errorf("GET %s: 回傳非陣列", path)
+		}
+		items = append(items, arr...)
+		if len(arr) < 50 {
+			break
+		}
+		page++
+	}
+	var b strings.Builder
+	b.WriteByte('[')
+	for i, item := range items {
+		if i > 0 {
+			b.WriteByte(',')
+		}
+		b.Write(item)
+	}
+	b.WriteByte(']')
+	return json.Unmarshal([]byte(b.String()), out)
+}
+
+// CurrentUser 以 token 呼叫 /user 取實際帳號，與 gitea.py 的
+// get_current_username() 同源（token 決定帳號，不接受環境變數覆寫，
+// 失敗即報錯退出，不靜默退回預設值）。
+func (s *apiSource) CurrentUser() (string, error) {
+	var user struct {
+		Username string `json:"username"`
+		Login    string `json:"login"`
+	}
+	if err := s.getJSON("user", nil, &user); err != nil {
+		return "", err
+	}
+	if user.Username != "" {
+		return user.Username, nil
+	}
+	if user.Login != "" {
+		return user.Login, nil
+	}
+	return "", fmt.Errorf("無法從 Gitea API /user 取得目前帳號")
+}
+
+func (s *apiSource) MyOrganizations() ([]string, error) {
+	var orgs []struct {
+		Username string `json:"username"`
+	}
+	if err := s.listAll("user/orgs", nil, &orgs); err != nil {
+		return nil, err
+	}
+	names := make([]string, 0, len(orgs))
+	for _, o := range orgs {
+		if o.Username != "" {
+			names = append(names, o.Username)
+		}
+	}
+	return names, nil
+}
+
+func (s *apiSource) OrganizationRepositories(org string) ([]workflow.Repo, error) {
+	var repos []workflow.Repo
+	if err := s.listAll("orgs/"+org+"/repos", nil, &repos); err != nil {
+		return nil, err
+	}
+	return repos, nil
+}
+
+func (s *apiSource) OpenIssues(owner, repo string) ([]workflow.Issue, error) {
+	var issues []workflow.Issue
+	// 與 gitea.py 一致：type=issues 排除 PR；state=open。
+	if err := s.listAll(fmt.Sprintf("repos/%s/%s/issues", owner, repo), map[string]string{"type": "issues", "state": "open"}, &issues); err != nil {
+		return nil, err
+	}
+	return issues, nil
+}
+
+func (s *apiSource) OpenPulls(owner, repo string) ([]workflow.PullRequest, error) {
+	var pulls []workflow.PullRequest
+	if err := s.listAll(fmt.Sprintf("repos/%s/%s/pulls", owner, repo), map[string]string{"state": "open"}, &pulls); err != nil {
+		return nil, err
+	}
+	return pulls, nil
+}
+
+func (s *apiSource) IssueComments(owner, repo string, number int64) ([]workflow.Comment, error) {
+	var comments []workflow.Comment
+	if err := s.listAll(fmt.Sprintf("repos/%s/%s/issues/%d/comments", owner, repo, number), nil, &comments); err != nil {
+		return nil, err
+	}
+	return comments, nil
+}
+
+func (s *apiSource) TryGetIssue(owner, repo string, number int64) (workflow.Issue, bool, error) {
+	var issue workflow.Issue
+	body, code, err := s.get(fmt.Sprintf("repos/%s/%s/issues/%d", owner, repo, number), nil)
+	if err != nil {
+		return workflow.Issue{}, false, nil
+	}
+	if code != 200 {
+		return workflow.Issue{}, false, nil
+	}
+	if err := json.Unmarshal(body, &issue); err != nil {
+		return workflow.Issue{}, false, nil
+	}
+	return issue, true, nil
+}
+
+// loadEnv 讀 agents 倉庫的 .env（ACCESS_TOKEN、GITEA_API_DOMAIN）。
+func loadEnv(path string) {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return
+	}
+	for _, line := range strings.Split(string(data), "\n") {
+		line = strings.TrimSpace(line)
+		if line == "" || strings.HasPrefix(line, "#") {
+			continue
+		}
+		k, v, ok := strings.Cut(line, "=")
+		if !ok {
+			continue
+		}
+		k = strings.TrimSpace(k)
+		v = strings.Trim(strings.TrimSpace(v), "'\"")
+		if os.Getenv(k) == "" {
+			os.Setenv(k, v)
+		}
+	}
+}
+
+func main() {
+	// --xrefs 模式：從 stdin 讀文字，輸出解析後的引用目標（與 gitea.py
+	// _resolve_xref_targets 對照用）。組織與倉庫清單來自真實 API。
+	if len(os.Args) > 1 && os.Args[1] == "--xrefs" {
+		xrefsMain()
+		return
+	}
+	loadEnv(os.Getenv("HOME") + "/agents/.env")
+	domain := os.Getenv("GITEA_API_DOMAIN")
+	token := os.Getenv("ACCESS_TOKEN")
+	if domain == "" || token == "" {
+		fmt.Fprintln(os.Stderr, "缺少 GITEA_API_DOMAIN／ACCESS_TOKEN")
+		os.Exit(1)
+	}
+	src := &apiSource{
+		base:  "https://" + domain + "/api/v1/",
+		token: token,
+		hc:    &http.Client{Timeout: 30 * time.Second},
+	}
+	username, err := src.CurrentUser()
+	if err != nil {
+		fmt.Fprintln(os.Stderr, "CurrentUser:", err)
+		os.Exit(1)
+	}
+	hours := 4.0
+	items, scanErr := workflow.ScanStalled(src, username, hours, time.Now())
+	if scanErr != nil {
+		fmt.Fprintln(os.Stderr, "ScanStalled:", scanErr)
+		os.Exit(1)
+	}
+	// json.Marshal* 會把 <、>、& 轉義成 \u003c 等（含自訂 MarshalJSON 的輸出），
+	// 與 gitea.py（ensure_ascii=False）位元組不相容；必須停用 HTML 轉義。
+	var buf bytes.Buffer
+	enc := json.NewEncoder(&buf)
+	enc.SetEscapeHTML(false)
+	enc.SetIndent("", "  ")
+	if err := enc.Encode(items); err != nil {
+		fmt.Fprintln(os.Stderr, "Encode:", err)
+		os.Exit(1)
+	}
+	fmt.Print(buf.String())
+}
+
+// xrefsMain 對 stdin 的每行文字解析引用目標並輸出 JSON。
+func xrefsMain() {
+	loadEnv(os.Getenv("HOME") + "/agents/.env")
+	domain := os.Getenv("GITEA_API_DOMAIN")
+	token := os.Getenv("ACCESS_TOKEN")
+	if domain == "" || token == "" {
+		fmt.Fprintln(os.Stderr, "缺少 GITEA_API_DOMAIN／ACCESS_TOKEN")
+		os.Exit(1)
+	}
+	src := &apiSource{
+		base:  "https://" + domain + "/api/v1/",
+		token: token,
+		hc:    &http.Client{Timeout: 30 * time.Second},
+	}
+	orgs, err := src.MyOrganizations()
+	if err != nil {
+		fmt.Fprintln(os.Stderr, "MyOrganizations:", err)
+		os.Exit(1)
+	}
+	myOrgs := map[string]bool{}
+	for _, o := range orgs {
+		myOrgs[o] = true
+	}
+	data, _ := io.ReadAll(os.Stdin)
+	repos, _ := src.OrganizationRepositories("alterminal")
+	names := make([]string, 0, len(repos))
+	for _, r := range repos {
+		names = append(names, r.Name)
+	}
+	targets, err := workflow.ResolveXrefTargets("alterminal", "agents", []string{string(data)}, myOrgs, func(string) ([]string, error) {
+		return names, nil
+	})
+	if err != nil {
+		fmt.Fprintln(os.Stderr, "ResolveXrefTargets:", err)
+		os.Exit(1)
+	}
+	var buf bytes.Buffer
+	enc := json.NewEncoder(&buf)
+	enc.SetEscapeHTML(false)
+	enc.SetIndent("", "  ")
+	if err := enc.Encode(targets); err != nil {
+		fmt.Fprintln(os.Stderr, "Encode:", err)
+		os.Exit(1)
+	}
+	fmt.Print(buf.String())
+}

internal/workflow/types.go

@@ -3,6 +3,8 @@ package workflow
 import (
 	"encoding/json"
 	"regexp"
+	"strings"
+	"time"
 )
 
 // User 是 Gitea API 的使用者物件（僅取工作流判斷會用到的欄位）。
@@ -65,6 +67,7 @@ type PRRef struct {
 
 // Comment 是 issue／PR 的討論留言（PR 的留言也走 issues comments 端點）。
 type Comment struct {
+	Body      string `json:"body"`
 	CreatedAt string `json:"created_at"`
 	User      *User  `json:"user"`
 }
@@ -82,6 +85,9 @@ type Issue struct {
 	Number      int64       `json:"number"`
 	Index       int64       `json:"index"`
 	Title       string      `json:"title"`
+	State       string      `json:"state"`
+	Body        string      `json:"body"`
+	ClosedAt    string      `json:"closed_at"`
 	HTMLURL     string      `json:"html_url"`
 	URL         string      `json:"url"`
 	UpdatedAt   string      `json:"updated_at"`
@@ -216,3 +222,21 @@ func (p *PullRequest) FullName() string {
 	}
 	return repoFullNameFromURL(p.WebURL())
 }
+
+// parseMoment 對應 gitea.py 的 _parse_iso8601：剖析 ISO8601 字串（Z 後綴、
+// 小數秒、時區偏移皆可；無時區視為 UTC），失敗回 (零值, false)。
+// 保留原時區偏移、不轉 UTC——Python datetime.isoformat() 會原樣輸出
+// 「+08:00」這類偏移，轉了 UTC 輸出就變 +00:00，與基準位元組不相容。
+// stalled 掃描的時刻判斷（last_activity、催促冷卻）都以這裡的語義為準。
+func parseMoment(value string) (time.Time, bool) {
+	text := strings.TrimSpace(value)
+	if text == "" {
+		return time.Time{}, false
+	}
+	for _, layout := range []string{time.RFC3339Nano, time.RFC3339, "2006-01-02T15:04:05", "2006-01-02"} {
+		if t, err := time.Parse(layout, text); err == nil {
+			return t, true
+		}
+	}
+	return time.Time{}, false
+}

internal/workflow/workflow.go

@@ -0,0 +1,528 @@
+// 套件 workflow 實作 gitea.py 工作流的核心判定邏輯（teai issue #7）。
+//
+// 行為基準是 alterminal/agents 的 scripts/lib/gitea.py：xref 解析
+// （#N、repo#N、owner/repo#N）與 stalled 停滯掃描（reason 分類、催促冷卻、
+// 父追蹤項把子項活動計入 last_activity）。判定規則以 AGENTS.md 為準，
+// 本套件只實作、不改義。
+//
+// 資料以 Source 介面注入：CLI 層負責拉取 API，測試用假資料源，
+// 邏輯本身離線可測（README 設計原則 4：可直接替換原型、交叉驗證）。
+package workflow
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"regexp"
+	"sort"
+	"strconv"
+	"strings"
+	"time"
+	"unicode"
+	"unicode/utf8"
+)
+
+// 常數與 gitea.py 保持一致（STALLED_DEFAULT_HOURS、NUDGE_COOLDOWN_HOURS）。
+const (
+	// StalledDefaultHours 是 stalled 掃描的預設門檻（小時）。
+	StalledDefaultHours = 4.0
+	// NudgeCooldownHours 是「最後留言出自目前帳號」項目的催促冷卻（小時）。
+	NudgeCooldownHours = 24.0
+)
+
+// xrefPattern 對應 gitea.py 的 XREF_PATTERN：#N、repo#N、owner/repo#N。
+//
+// 前面不得是文數字／底線／斜線（避免切進 alterminal/bear#47 的後半段）；
+// owner/repo 兩段之間必須有斜線（避免把 bear-cli#10 誤判成 cli#10）。
+// Go 的 regexp 不支援 lookbehind，改在掃描時檢查前一字元。
+var xrefPattern = regexp.MustCompile(`([A-Za-z0-9_.-]+(?:/[A-Za-z0-9_.-]+)?)?#(\d+)`)
+
+// Item 是 stalled 掃描的單筆輸出（欄位對應 gitea.py 的 find_stalled_work）。
+type Item struct {
+	Type           string
+	Repo           string
+	Number         int64
+	Title          string
+	URL            string
+	Assignees      []string
+	Author         string
+	Reviewers      []string
+	LastCommentBy  string
+	LastActivityAt time.Time
+	StalledHours   float64
+	Reason         string
+	ChildActivity  []Child
+}
+
+// MarshalJSON 輸出鍵集與鍵序與 gitea.py 完全一致的物件：
+// issue 帶 assignees；pull 帶 author 與 reviewers；
+// child_activity 僅在有子項摘要時輸出。
+func (i Item) MarshalJSON() ([]byte, error) {
+	var b strings.Builder
+	b.WriteString(`{"type":`)
+	writeJSON(&b, i.Type)
+	b.WriteString(`,"repo":`)
+	writeJSON(&b, i.Repo)
+	b.WriteString(`,"number":`)
+	fmt.Fprintf(&b, "%d", i.Number)
+	b.WriteString(`,"title":`)
+	writeJSON(&b, i.Title)
+	b.WriteString(`,"url":`)
+	writeJSON(&b, i.URL)
+	if i.Type == "pull" {
+		b.WriteString(`,"author":`)
+		writeJSON(&b, i.Author)
+		b.WriteString(`,"reviewers":`)
+		writeJSON(&b, i.Reviewers)
+	} else {
+		b.WriteString(`,"assignees":`)
+		writeJSON(&b, i.Assignees)
+	}
+	b.WriteString(`,"last_comment_by":`)
+	writeJSON(&b, i.LastCommentBy)
+	b.WriteString(`,"last_activity_at":`)
+	writeJSON(&b, FormatMoment(i.LastActivityAt))
+	b.WriteString(`,"stalled_hours":`)
+	// Python round(x, 1) 的 json 輸出是 48.0／10.4（repr 帶 .0）；
+	// %g 會輸出 48，極大值還會變 1e+06，改定點一位小數。
+	b.WriteString(strconv.FormatFloat(i.StalledHours, 'f', 1, 64))
+	b.WriteString(`,"reason":`)
+	writeJSON(&b, i.Reason)
+	if len(i.ChildActivity) > 0 {
+		b.WriteString(`,"child_activity":`)
+		writeJSON(&b, i.ChildActivity)
+	}
+	b.WriteString(`}`)
+	return []byte(b.String()), nil
+}
+
+// FormatMoment 輸出與 Python datetime.isoformat() 一致的時刻字串
+// （UTC 以 +00:00 表示，不用 Z；秒以下省略）。
+func FormatMoment(t time.Time) string {
+	if t.Nanosecond() != 0 {
+		return t.Format("2006-01-02T15:04:05.999999999-07:00")
+	}
+	return t.Format("2006-01-02T15:04:05-07:00")
+}
+
+// writeJSON 以停用 HTML 轉義的編碼器輸出：Python json.dumps（ensure_ascii=False）
+// 不會把 <、>、& 轉成 \u003c 等逸出，json.Marshal 預設會，造成位元組不相容。
+// Encoder 會在結尾補換行， trim 掉。
+func writeJSON(b *strings.Builder, v any) {
+	var buf bytes.Buffer
+	enc := json.NewEncoder(&buf)
+	enc.SetEscapeHTML(false)
+	if err := enc.Encode(v); err != nil {
+		return
+	}
+	b.Write(bytes.TrimSuffix(buf.Bytes(), []byte{'\n'}))
+}
+
+// Child 是父追蹤項的子項活動摘要。
+type Child struct {
+	Repo   string `json:"repo"`
+	Number int64  `json:"number"`
+	Title  string `json:"title"`
+	State  string `json:"state"`
+	// LastActivityAt 用指標：子項無可解析時刻時 Python 輸出 null（不是 ""）。
+	LastActivityAt *string `json:"last_activity_at"`
+}
+
+// XrefTarget 是解析後的引用目標（owner、repo、number）。
+type XrefTarget struct {
+	Owner  string
+	Repo   string
+	Number int64
+}
+
+// Source 是 stalled 掃描需要的資料源（CLI 層以 API 實作；測試注入假資料）。
+type Source interface {
+	// MyOrganizations 回傳目前帳號所屬組織清單。
+	MyOrganizations() ([]string, error)
+	// OrganizationRepositories 回傳組織的倉庫清單。
+	OrganizationRepositories(org string) ([]Repo, error)
+	// OpenIssues 回傳倉庫的 open issues（Gitea 會混入 PR，由掃描端過濾）。
+	OpenIssues(owner, repo string) ([]Issue, error)
+	// OpenPulls 回傳倉庫的 open pull requests。
+	OpenPulls(owner, repo string) ([]PullRequest, error)
+	// IssueComments 回傳 issue／PR 的留言。
+	IssueComments(owner, repo string, number int64) ([]Comment, error)
+	// TryGetIssue 寬容版單一 issue 查詢：失敗（含 404）回 (零值, false, nil)。
+	TryGetIssue(owner, repo string, number int64) (Issue, bool, error)
+}
+
+// iterXrefs 產出文字中的 (prefix, number) 配對（對應 _iter_issue_xrefs）。
+//
+// Python 原版以 lookbehind (?<![\w/#]) 在匹配起點檢查前一「字元」，
+// 且 \w 採 Unicode（中日韓、全形數字都算）。Go regexp 不支援 lookbehind，
+// 改為掃描時檢查起點前一 rune：是文數字（Unicode）／底線／斜線／# 者略過，
+// 並從起點的下一個 rune 重試——與 Python finditer 的逐位置語義一致，
+// 否則「修復bear-cli#9」這種寫法會整段被丟棄（Python 只匹配後半 cli#9）。
+func iterXrefs(text string) [][2]string {
+	var out [][2]string
+	pos := 0
+	for pos <= len(text) {
+		m := xrefPattern.FindStringIndex(text[pos:])
+		if m == nil {
+			break
+		}
+		start, end := pos+m[0], pos+m[1]
+		if start > 0 {
+			prev, _ := utf8.DecodeLastRuneInString(text[:start])
+			if isWordChar(prev) || prev == '/' || prev == '#' {
+				_, size := utf8.DecodeRuneInString(text[start:])
+				pos = start + size
+				continue
+			}
+		}
+		match := text[start:end]
+		i := strings.IndexByte(match, '#')
+		prefix := match[:i]
+		number := match[i+1:]
+		out = append(out, [2]string{prefix, number})
+		pos = end
+	}
+	return out
+}
+
+// isWordChar 對應 Python \w（Unicode）：字母／數字／底線。
+// 前一版只認 ASCII，中文緊鄰 #N 時（「修復#12」）與 Python 行為分歧。
+func isWordChar(r rune) bool {
+	return r == '_' || unicode.IsLetter(r) || unicode.IsDigit(r)
+}
+
+// ResolveXrefTargets 把內文／留言中的引用解析成目標清單（對應 _resolve_xref_targets）。
+//
+// 單段 #N 指向父項所在倉庫；單段 repo#N 需 repo 存在於父項所屬組織
+// （「PR#50」這類寫法因 repo 不存在而自動略過）；owner/repo#N 需 owner
+// 為目前帳號所屬組織（跨倉庫子項，如 bear-cli#9 → bear#35 的同組織判定）。
+// 去重、保留出現順序。
+func ResolveXrefTargets(org, repo string, texts []string, myOrgs map[string]bool, orgRepos func(org string) ([]string, error)) ([]XrefTarget, error) {
+	var resolved []XrefTarget
+	seen := map[XrefTarget]bool{}
+	var orgRepoSet map[string]bool
+	for _, text := range texts {
+		for _, pair := range iterXrefs(text) {
+			prefix, numberStr := pair[0], pair[1]
+			var number int64
+			if _, err := fmt.Sscanf(numberStr, "%d", &number); err != nil || number <= 0 {
+				continue
+			}
+			var target XrefTarget
+			switch {
+			case strings.Contains(prefix, "/"):
+				parts := strings.SplitN(prefix, "/", 2)
+				owner, name := parts[0], parts[1]
+				if owner != "" && name != "" && myOrgs[owner] {
+					target = XrefTarget{owner, name, number}
+				}
+			case prefix != "":
+				if orgRepoSet == nil {
+					names, err := orgRepos(org)
+					if err != nil {
+						return nil, err
+					}
+					orgRepoSet = map[string]bool{}
+					for _, n := range names {
+						orgRepoSet[n] = true
+					}
+				}
+				if orgRepoSet[prefix] {
+					target = XrefTarget{org, prefix, number}
+				}
+			default:
+				target = XrefTarget{org, repo, number}
+			}
+			if target != (XrefTarget{}) && !seen[target] {
+				seen[target] = true
+				resolved = append(resolved, target)
+			}
+		}
+	}
+	return resolved, nil
+}
+
+// childActivity 計算父追蹤項的子項活動（對應 _child_activity）。
+//
+// 只採計向下引用：子項建立時間需晚於父項（父項內文回指更早的規劃 issue
+// 是上行引用，不採計）。資料源失敗（含編號不存在）靜默略過，不影響掃描。
+func childActivity(src Source, org, repo string, parent Issue, comments []Comment, myOrgs map[string]bool, orgRepos func(string) ([]string, error)) (moments []time.Time, children []Child) {
+	texts := []string{parent.Body}
+	for _, c := range comments {
+		texts = append(texts, c.Body)
+	}
+	targets, err := ResolveXrefTargets(org, repo, texts, myOrgs, orgRepos)
+	if err != nil {
+		return nil, nil
+	}
+	for _, t := range targets {
+		child, ok, gerr := src.TryGetIssue(t.Owner, t.Repo, t.Number)
+		if gerr != nil || !ok {
+			continue
+		}
+		if t.Owner == org && t.Repo == repo && child.issueNumber() == parent.issueNumber() {
+			continue // 自我引用
+		}
+		parentCreated, pcOK := parseMoment(parent.CreatedAt)
+		childCreated, ccOK := parseMoment(child.CreatedAt)
+		if pcOK && ccOK && !childCreated.After(parentCreated) {
+			continue // 上行引用（父項回指更早或同時的 issue）；時間未知則不排除
+		}
+		var ms []time.Time
+		if m, ok := parseMoment(child.UpdatedAt); ok {
+			ms = append(ms, m)
+		}
+		if m, ok := parseMoment(child.ClosedAt); ok {
+			ms = append(ms, m)
+		}
+		if cs, cerr := src.IssueComments(t.Owner, t.Repo, t.Number); cerr == nil {
+			for _, c := range cs {
+				if m, ok := parseMoment(c.CreatedAt); ok {
+					ms = append(ms, m)
+				}
+			}
+		}
+		var last *string
+		if len(ms) > 0 {
+			latest := maxTime(ms)
+			moments = append(moments, latest)
+			// 與 Item 相同用 FormatMoment（Python isoformat：UTC 記 +00:00）；
+			// RFC3339 對 UTC 會輸出 Z，與基準不相容。
+			s := FormatMoment(latest)
+			last = &s
+		}
+		children = append(children, Child{
+			Repo:           t.Owner + "/" + t.Repo,
+			Number:         child.Number,
+			Title:          child.Title,
+			State:          child.State,
+			LastActivityAt: last,
+		})
+	}
+	return moments, children
+}
+
+func maxTime(ts []time.Time) time.Time {
+	best := ts[0]
+	for _, t := range ts[1:] {
+		if t.After(best) {
+			best = t
+		}
+	}
+	return best
+}
+
+// ScanStalled 掃描跨組織的停滯 open issues／PR（對應 find_stalled_work）。
+//
+// 判定：最後活動（留言時間與本身 updated_at 取較晚者，父追蹤項再加計
+// 子項活動）距今超過 threshold 小時。刻意包含拾取死角形態：最後一則留言
+// 出自 assignee／PR 作者本人且超過時限——工作休眠、無人催促。最後留言
+// 出自目前帳號（username）的項目在冷卻期間不列入（已催促過）；冷卻後
+// 仍停滯會再出現。輸出依停滯時間由長到短排序。
+func ScanStalled(src Source, username string, threshold float64, now time.Time) ([]Item, error) {
+	orgs, err := src.MyOrganizations()
+	if err != nil {
+		return nil, err
+	}
+	myOrgs := make(map[string]bool, len(orgs))
+	for _, o := range orgs {
+		myOrgs[o] = true
+	}
+	orgRepos := func(org string) ([]string, error) {
+		repos, err := src.OrganizationRepositories(org)
+		if err != nil {
+			return nil, err
+		}
+		names := make([]string, 0, len(repos))
+		for _, r := range repos {
+			if r.Name != "" {
+				names = append(names, r.Name)
+			}
+		}
+		return names, nil
+	}
+	var items []Item
+	for _, org := range orgs {
+		repos, err := src.OrganizationRepositories(org)
+		if err != nil {
+			continue
+		}
+		for _, r := range repos {
+			if r.Name == "" || r.Empty {
+				continue
+			}
+			// 停用 PR 的倉庫沒有 PR 可掃；issues 照常（gitea.py _iter_open_issues 不檢查此欄位）。
+			scanPulls := r.HasPullRequests == nil || *r.HasPullRequests
+			issues, err := src.OpenIssues(org, r.Name)
+			if err != nil {
+				continue
+			}
+			for _, issue := range issues {
+				if issue.PullRequest != nil {
+					continue
+				}
+				comments, err := src.IssueComments(org, r.Name, issue.Number)
+				if err != nil {
+					continue
+				}
+				item, ok := considerIssue(src, org, r.Name, issue, comments, username, threshold, now, myOrgs, orgRepos)
+				if ok {
+					items = append(items, item)
+				}
+			}
+			if !scanPulls {
+				continue
+			}
+			pulls, err := src.OpenPulls(org, r.Name)
+			if err != nil {
+				continue
+			}
+			for _, pr := range pulls {
+				comments, err := src.IssueComments(org, r.Name, pr.Number)
+				if err != nil {
+					continue
+				}
+				if item, ok := considerPull(pr, comments, username, threshold, now); ok {
+					items = append(items, item)
+				}
+			}
+		}
+	}
+	sort.SliceStable(items, func(i, j int) bool {
+		return items[i].StalledHours > items[j].StalledHours
+	})
+	return items, nil
+}
+
+// considerIssue 對單一 issue 套用停滯判定（對應 _consider 的 issue 分支）。
+func considerIssue(src Source, org, repo string, issue Issue, comments []Comment, username string, threshold float64, now time.Time, myOrgs map[string]bool, orgRepos func(string) ([]string, error)) (Item, bool) {
+	childMoments, children := childActivity(src, org, repo, issue, comments, myOrgs, orgRepos)
+	assignees := AssigneeNames(&issue)
+	var moments []time.Time
+	if m, ok := parseMoment(issue.UpdatedAt); ok {
+		moments = append(moments, m)
+	}
+	if m, ok := parseMoment(issue.CreatedAt); ok {
+		moments = append(moments, m)
+	}
+	for _, c := range comments {
+		if m, ok := parseMoment(c.CreatedAt); ok {
+			moments = append(moments, m)
+		}
+	}
+	moments = append(moments, childMoments...)
+	if len(moments) == 0 {
+		return Item{}, false
+	}
+	lastActivity := maxTime(moments)
+	stalled := now.Sub(lastActivity).Hours()
+	if stalled < threshold {
+		return Item{}, false
+	}
+	last := LastComment(comments)
+	lastCommentBy := ""
+	if last != nil {
+		lastCommentBy = last.Author()
+	}
+	if lastCommentBy == username {
+		if m, ok := parseMoment(last.CreatedAt); ok && now.Sub(m).Hours() < NudgeCooldownHours {
+			return Item{}, false
+		}
+	}
+	reason := "waiting-outside"
+	switch {
+	case len(assignees) == 0:
+		reason = "no-assignee"
+	case lastCommentBy != "" && containsString(assignees, lastCommentBy):
+		reason = "assignee-idle"
+	case lastCommentBy == "":
+		reason = "no-commenter"
+	}
+	if len(children) > 0 && anyOpen(children) {
+		reason = "parent-tracking"
+	}
+	item := Item{
+		Type: "issue", Repo: issue.FullName(), Number: issue.issueNumber(),
+		Title: issue.Title, URL: issue.WebURL(),
+		Assignees:     assignees,
+		LastCommentBy: lastCommentBy, LastActivityAt: lastActivity,
+		StalledHours: round1(stalled), Reason: reason,
+	}
+	if len(children) > 0 {
+		item.ChildActivity = children
+	}
+	return item, true
+}
+
+// considerPull 對單一 PR 套用停滯判定（對應 _consider 的 pull 分支）。
+func considerPull(pr PullRequest, comments []Comment, username string, threshold float64, now time.Time) (Item, bool) {
+	reviewers := ReviewerNames(&pr)
+	author := pr.Author()
+	var moments []time.Time
+	if m, ok := parseMoment(pr.UpdatedAt); ok {
+		moments = append(moments, m)
+	}
+	if m, ok := parseMoment(pr.CreatedAt); ok {
+		moments = append(moments, m)
+	}
+	for _, c := range comments {
+		if m, ok := parseMoment(c.CreatedAt); ok {
+			moments = append(moments, m)
+		}
+	}
+	if len(moments) == 0 {
+		return Item{}, false
+	}
+	lastActivity := maxTime(moments)
+	stalled := now.Sub(lastActivity).Hours()
+	if stalled < threshold {
+		return Item{}, false
+	}
+	last := LastComment(comments)
+	lastCommentBy := ""
+	if last != nil {
+		lastCommentBy = last.Author()
+	}
+	if lastCommentBy == username {
+		if m, ok := parseMoment(last.CreatedAt); ok && now.Sub(m).Hours() < NudgeCooldownHours {
+			return Item{}, false
+		}
+	}
+	reason := "no-commenter"
+	switch {
+	case len(reviewers) == 0:
+		reason = "no-reviewer"
+	case lastCommentBy == author:
+		reason = "author-idle"
+	case lastCommentBy != "" && containsString(reviewers, lastCommentBy):
+		reason = "reviewer-idle"
+	}
+	item := Item{
+		Type: "pull", Repo: pr.FullName(), Number: pr.Number,
+		Title: pr.Title, URL: pr.WebURL(),
+		Author: author, Reviewers: reviewers,
+		LastCommentBy: lastCommentBy, LastActivityAt: lastActivity,
+		StalledHours: round1(stalled), Reason: reason,
+	}
+	return item, true
+}
+
+func anyOpen(children []Child) bool {
+	for _, c := range children {
+		if c.State == "open" {
+			return true
+		}
+	}
+	return false
+}
+
+// round1 舍入到小數一位（對應 Python round(x, 1)）。
+// 經 strconv 的十進位正確舍入（半偶數），與 Python 的浮點 round 行為一致，
+// 避免 (x*10+0.5) 截斷在 .x5 邊界產生偏差。
+func round1(v float64) float64 {
+	r, err := strconv.ParseFloat(strconv.FormatFloat(v, 'f', 1, 64), 64)
+	if err != nil {
+		return v
+	}
+	return r
+}

internal/workflow/workflow_test.go

@@ -0,0 +1,535 @@
+// workflow 套件的單元測試（teai issue #7 驗收：xref 邊界案例與 stalled 判定）。
+//
+// fakeSource 以假資料實作 Source 介面，邏輯離線可測；
+// 語義對照組是 alterminal/agents scripts/lib/gitea.py。
+package workflow
+
+import (
+	"bytes"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"strings"
+	"testing"
+	"time"
+)
+
+func at(minutes int) time.Time {
+	return time.Date(2026, 9, 10, 8, 0, 0, 0, time.UTC).Add(time.Duration(minutes) * time.Minute)
+}
+
+// fakeSource 是注入假資料的 Source。
+type fakeSource struct {
+	orgs  []string
+	repos map[string][]Repo
+	// issues[owner/repo][number]
+	issues map[string]map[int64]Issue
+	// pulls[owner/repo]
+	pulls map[string][]PullRequest
+	// comments[owner/repo/number]
+	comments map[string][]Comment
+}
+
+func (f *fakeSource) MyOrganizations() ([]string, error) { return f.orgs, nil }
+
+func (f *fakeSource) OrganizationRepositories(org string) ([]Repo, error) {
+	return f.repos[org], nil
+}
+
+func (f *fakeSource) OpenIssues(owner, repo string) ([]Issue, error) {
+	var out []Issue
+	for _, i := range f.issues[owner+"/"+repo] {
+		out = append(out, i)
+	}
+	return out, nil
+}
+
+func (f *fakeSource) OpenPulls(owner, repo string) ([]PullRequest, error) {
+	return f.pulls[owner+"/"+repo], nil
+}
+
+func (f *fakeSource) IssueComments(owner, repo string, number int64) ([]Comment, error) {
+	return f.comments[fmt.Sprintf("%s/%s/%d", owner, repo, number)], nil
+}
+
+func (f *fakeSource) TryGetIssue(owner, repo string, number int64) (Issue, bool, error) {
+	i, ok := f.issues[owner+"/"+repo][number]
+	if !ok {
+		return Issue{}, false, nil
+	}
+	return i, true, nil
+}
+
+func repoWith(name string, hasPR bool) []Repo {
+	h := hasPR
+	return []Repo{{Name: name, HasPullRequests: &h}}
+}
+
+// iso 把相對分鐘轉成 parseMoment 可剖析的 ISO8601 字串（假資料用）。
+func iso(minutes int) string { return FormatMoment(at(minutes)) }
+
+func mustResolve(t *testing.T, org, repo string, texts []string, myOrgs map[string]bool, orgRepos func(string) ([]string, error)) []XrefTarget {
+	t.Helper()
+	targets, err := ResolveXrefTargets(org, repo, texts, myOrgs, orgRepos)
+	if err != nil {
+		t.Fatalf("ResolveXrefTargets: %v", err)
+	}
+	return targets
+}
+
+// TestIterXrefsEdges 驗證 regex 邊界：lookbehind 等價實作與兩段式斜線限制。
+func TestIterXrefsEdges(t *testing.T) {
+	cases := []struct {
+		name string
+		text string
+		want [][2]string
+	}{
+		{"單段 #N", "父項：#3。", [][2]string{{"3"}, {"", "3"}}[1:]},
+		{"單段 repo#N 存在", "見 agents#10", [][2]string{{"agents", "10"}}},
+		{"PR#50 寫法不是 repo", "PR#50 與 issue#49", [][2]string{{"PR", "50"}, {"issue", "49"}}},
+		{"owner/repo#N", "alterminal/agents#32", [][2]string{{"alterminal/agents", "32"}}},
+		{"斜線後不切半段", "alterminal/bear#47 只應匹配整段", [][2]string{{"alterminal/bear", "47"}}},
+		{"連字號 repo 名", "bear-cli#9", [][2]string{{"bear-cli", "9"}}},
+		{"路徑後的 #N 不匹配", "see https://x/a/#frag not #5", [][2]string{{"", "5"}}},
+		// Python \w 是 Unicode：CJK 緊鄰 #N 時整體視為 \w，lookbehind 擋下。
+		{"CJK 緊鄰 #N 略過", "修復#12的問題，見 #5", [][2]string{{"", "5"}}},
+		{"CJK 緊鄰 repo#N 整段略過", "修復agents#12", nil},
+		{"CJK 緊鄰連字號 repo 匹配後半", "修復bear-cli#9 見 #5", [][2]string{{"cli", "9"}, {"", "5"}}},
+		{"連續井號", "##5", nil},
+		{"全形數字後 #N", "１２#5", nil},
+	}
+	for _, tc := range cases {
+		t.Run(tc.name, func(t *testing.T) {
+			got := iterXrefs(tc.text)
+			if len(got) != len(tc.want) {
+				t.Fatalf("iterXrefs(%q) = %v, want %v", tc.text, got, tc.want)
+			}
+			for i := range got {
+				if got[i] != tc.want[i] {
+					t.Fatalf("iterXrefs(%q)[%d] = %v, want %v", tc.text, i, got[i], tc.want[i])
+				}
+			}
+		})
+	}
+}
+
+// TestResolveXrefTargets 驗證三種形態的解析與單段 repo 的存在性邊界（#7 驗收）。
+func TestResolveXrefTargets(t *testing.T) {
+	myOrgs := map[string]bool{"alterminal": true}
+	orgRepos := func(string) ([]string, error) { return []string{"agents", "teai", "bear-cli"}, nil }
+	texts := []string{"父項：#3，子項 teai#7，跨倉 alterminal/bear#35，不存在 nope#9，PR#50"}
+
+	got := mustResolve(t, "alterminal", "agents", texts, myOrgs, orgRepos)
+	want := []XrefTarget{
+		{Owner: "alterminal", Repo: "agents", Number: 3},
+		{Owner: "alterminal", Repo: "teai", Number: 7},
+		{Owner: "alterminal", Repo: "bear", Number: 35},
+	}
+	if len(got) != len(want) {
+		t.Fatalf("got %v, want %v", got, want)
+	}
+	for i := range want {
+		if got[i] != want[i] {
+			t.Fatalf("got[%d] %v, want %v", i, got[i], want[i])
+		}
+	}
+}
+
+// TestResolveXrefTargetsOwnerNotMyOrg owner/repo#N 的 owner 非所屬組織 → 不解析。
+func TestResolveXrefTargetsOwnerNotMyOrg(t *testing.T) {
+	myOrgs := map[string]bool{"alterminal": true}
+	orgRepos := func(string) ([]string, error) { return nil, nil }
+	got := mustResolve(t, "alterminal", "agents", []string{"other/repo#1"}, myOrgs, orgRepos)
+	if len(got) != 0 {
+		t.Fatalf("owner 非所屬組織應略過，got %v", got)
+	}
+}
+
+// TestResolveXrefTargetsDedup 同一目標重複出現只保留第一個。
+func TestResolveXrefTargetsDedup(t *testing.T) {
+	myOrgs := map[string]bool{"alterminal": true}
+	orgRepos := func(string) ([]string, error) { return []string{"teai"}, nil }
+	got := mustResolve(t, "alterminal", "agents", []string{"#7 又 teai#7"}, myOrgs, orgRepos)
+	if len(got) != 2 {
+		t.Fatalf("應兩筆（#7 同倉庫、teai#7 跨倉庫），got %v", got)
+	}
+}
+
+// TestScanStalledIssueReasons 驗證 issue 的 reason 分類與排序。
+func TestScanStalledIssueReasons(t *testing.T) {
+	now := at(0)
+	src := &fakeSource{
+		orgs: []string{"alterminal"},
+		repos: map[string][]Repo{
+			"alterminal": repoWith("agents", true),
+		},
+		issues: map[string]map[int64]Issue{
+			"alterminal/agents": {
+				1: {Number: 1, Title: "無分派者", State: "open", CreatedAt: iso(-600), UpdatedAt: iso(-600), Repository: &Repository{FullName: "alterminal/agents"}, URL: "u1"},
+				2: {Number: 2, Title: "分派者自己最後留言", State: "open", User: &User{UserName: "ceo"}, CreatedAt: iso(-600), UpdatedAt: iso(-300), Assignees: []User{{UserName: "ceo"}}, Repository: &Repository{FullName: "alterminal/agents"}, URL: "u2"},
+				3: {Number: 3, Title: "無留言", State: "open", CreatedAt: iso(-600), UpdatedAt: iso(-300), Assignees: []User{{UserName: "ceo"}}, Repository: &Repository{FullName: "alterminal/agents"}, URL: "u3"},
+				4: {Number: 4, Title: "等外部回應", State: "open", CreatedAt: iso(-600), UpdatedAt: iso(-300), Assignees: []User{{UserName: "ceo"}}, Repository: &Repository{FullName: "alterminal/agents"}, URL: "u4"},
+				5: {Number: 5, Title: "太新不在門檻內", State: "open", CreatedAt: iso(-30), UpdatedAt: iso(-30), Assignees: []User{{UserName: "ceo"}}, Repository: &Repository{FullName: "alterminal/agents"}, URL: "u5"},
+			},
+		},
+		comments: map[string][]Comment{
+			"alterminal/agents/2": {{User: &User{UserName: "ceo"}, CreatedAt: iso(-300)}},
+			"alterminal/agents/4": {{User: &User{UserName: "dan"}, CreatedAt: iso(-300)}},
+		},
+	}
+	got, err := ScanStalled(src, "admin", 4.0, now)
+	if err != nil {
+		t.Fatalf("ScanStalled: %v", err)
+	}
+	// 1: no-assignee（10h）、2: assignee-idle（5h）、3: no-commenter（5h）、4: waiting-outside（5h）、5: 不列入
+	if len(got) != 4 {
+		t.Fatalf("應 4 筆，got %d：%v", len(got), got)
+	}
+	byNumber := map[int64]Item{}
+	for _, it := range got {
+		byNumber[it.Number] = it
+	}
+	for n, wantReason := range map[int64]string{1: "no-assignee", 2: "assignee-idle", 3: "no-commenter", 4: "waiting-outside"} {
+		if byNumber[n].Reason != wantReason {
+			t.Errorf("issue %d reason = %q, want %q", n, byNumber[n].Reason, wantReason)
+		}
+	}
+	if got[0].Number != 1 || got[0].StalledHours != 10 {
+		t.Errorf("排序應由長到短，首筆 issue 1（10h），got %v", got[0])
+	}
+	if byNumber[2].LastCommentBy != "ceo" {
+		t.Errorf("issue 2 last_comment_by 應為 ceo，got %q", byNumber[2].LastCommentBy)
+	}
+}
+
+// TestScanStalledNudgeCooldown 最後留言出自掃描者本人 → 24 小時內冷卻不列入。
+func TestScanStalledNudgeCooldown(t *testing.T) {
+	now := at(0)
+	src := &fakeSource{
+		orgs:  []string{"alterminal"},
+		repos: map[string][]Repo{"alterminal": repoWith("agents", true)},
+		issues: map[string]map[int64]Issue{
+			"alterminal/agents": {
+				1: {Number: 1, State: "open", CreatedAt: iso(-600), UpdatedAt: iso(-600), Assignees: []User{{UserName: "max"}}, Repository: &Repository{FullName: "alterminal/agents"}},
+			},
+		},
+		comments: map[string][]Comment{
+			// admin（掃描者）10 小時前催促過 → 冷卻中，不列入。
+			"alterminal/agents/1": {{User: &User{UserName: "admin"}, CreatedAt: iso(-600)}},
+		},
+	}
+	got, err := ScanStalled(src, "admin", 4.0, now)
+	if err != nil {
+		t.Fatalf("ScanStalled: %v", err)
+	}
+	if len(got) != 0 {
+		t.Fatalf("催促冷卻中的項目不應列入，got %v", got)
+	}
+	// 冷卻過了（25 小時前催促）→ 重新列入。
+	src.comments["alterminal/agents/1"] = []Comment{{User: &User{UserName: "admin"}, CreatedAt: iso(-1500)}}
+	got, err = ScanStalled(src, "admin", 4.0, now)
+	if err != nil {
+		t.Fatalf("ScanStalled: %v", err)
+	}
+	if len(got) != 1 || got[0].Reason != "waiting-outside" {
+		t.Fatalf("冷卻後應重新列入，got %v", got)
+	}
+}
+
+// TestScanStalledParentTracking 父追蹤項：子項活動計入 last_activity、reason 標記。
+func TestScanStalledParentTracking(t *testing.T) {
+	now := at(0)
+	// 父項與子項都 5 小時沒動：父項 last_activity 計入子項活動後同為 5h，
+	// 應以 parent-tracking 列入並附子項摘要；子項本身則是 assignee-idle。
+	src := &fakeSource{
+		orgs:  []string{"alterminal"},
+		repos: map[string][]Repo{"alterminal": repoWith("teai", true)},
+		issues: map[string]map[int64]Issue{
+			"alterminal/teai": {
+				3: {Number: 3, Title: "父", State: "open", Body: "子項：#7", CreatedAt: iso(-700), UpdatedAt: iso(-300), Assignees: []User{{UserName: "ceo"}}, Repository: &Repository{FullName: "alterminal/teai"}},
+				7: {Number: 7, Title: "子", State: "open", CreatedAt: iso(-650), UpdatedAt: iso(-300), Assignees: []User{{UserName: "max"}}, Repository: &Repository{FullName: "alterminal/teai"}},
+			},
+		},
+		comments: map[string][]Comment{
+			"alterminal/teai/7": {{User: &User{UserName: "max"}, CreatedAt: iso(-300)}},
+		},
+	}
+	got, err := ScanStalled(src, "admin", 4.0, now)
+	if err != nil {
+		t.Fatalf("ScanStalled: %v", err)
+	}
+	var parent3, child7 *Item
+	for i := range got {
+		switch got[i].Number {
+		case 3:
+			parent3 = &got[i]
+		case 7:
+			child7 = &got[i]
+		}
+	}
+	if child7 == nil {
+		t.Fatalf("子項 7 應列入（5h 無活動），got %v", got)
+	}
+	if child7.Reason != "assignee-idle" {
+		t.Errorf("子項 7 reason = %q, want assignee-idle", child7.Reason)
+	}
+	if parent3 == nil {
+		t.Fatalf("父項 3 應列入，got %v", got)
+	}
+	if parent3.Reason != "parent-tracking" {
+		t.Errorf("父項 3 reason = %q, want parent-tracking", parent3.Reason)
+	}
+	if len(parent3.ChildActivity) != 1 || parent3.ChildActivity[0].Number != 7 {
+		t.Errorf("父項 3 應附子項摘要，got %v", parent3.ChildActivity)
+	}
+	if parent3.StalledHours != 5 {
+		t.Errorf("父項 3 stalled_hours = %v, want 5", parent3.StalledHours)
+	}
+
+	// 子項 1 小時前恢復活動 → 父項 last_activity 跟著更新，未達門檻不列入；
+	// 子項本身也不停滯。整份輸出應為空。
+	child := src.issues["alterminal/teai"][7]
+	child.UpdatedAt = iso(-60)
+	src.issues["alterminal/teai"][7] = child
+	src.comments["alterminal/teai/7"] = []Comment{{User: &User{UserName: "max"}, CreatedAt: iso(-60)}}
+	got, err = ScanStalled(src, "admin", 4.0, now)
+	if err != nil {
+		t.Fatalf("ScanStalled: %v", err)
+	}
+	if len(got) != 0 {
+		t.Fatalf("子項推進中 → 父項不應誤報停滯，got %v", got)
+	}
+}
+
+// TestScanStalledParentTrackingNotChild 上行引用：引用對象早於父項 → 非子項，不採計。
+func TestScanStalledParentTrackingNotChild(t *testing.T) {
+	now := at(0)
+	src := &fakeSource{
+		orgs:  []string{"alterminal"},
+		repos: map[string][]Repo{"alterminal": repoWith("teai", true)},
+		issues: map[string]map[int64]Issue{
+			"alterminal/teai": {
+				47: {Number: 47, State: "open", Body: "規劃見 #39（更早）", CreatedAt: iso(-700), UpdatedAt: iso(-600), Assignees: []User{{UserName: "ceo"}}, Repository: &Repository{FullName: "alterminal/teai"}},
+				39: {Number: 39, State: "open", CreatedAt: iso(-2000), UpdatedAt: iso(-60), Repository: &Repository{FullName: "alterminal/teai"}},
+			},
+		},
+	}
+	got, err := ScanStalled(src, "admin", 4.0, now)
+	if err != nil {
+		t.Fatalf("ScanStalled: %v", err)
+	}
+	// #39 是上行引用，不採計 → 父項 47 停滯 10h（assignee-idle：ceo 分派、無留言）→ no-commenter。
+	var n47 *Item
+	for i := range got {
+		if got[i].Number == 47 {
+			n47 = &got[i]
+		}
+	}
+	if n47 == nil {
+		t.Fatalf("上行引用不採計 → 47 應停滯列入，got %v", got)
+	}
+	if n47.Reason != "no-commenter" {
+		t.Errorf("47 reason = %q, want no-commenter", n47.Reason)
+	}
+	if len(n47.ChildActivity) != 0 {
+		t.Errorf("上行引用不應產生子項摘要，got %v", n47.ChildActivity)
+	}
+	// #39 本身 updated 1 小時前 → 不列入。
+	for _, it := range got {
+		if it.Number == 39 {
+			t.Errorf("39 未達門檻不應列入：%v", it)
+		}
+	}
+}
+
+// TestScanStalledPullReasons 驗證 PR 的 reason 分類。
+func TestScanStalledPullReasons(t *testing.T) {
+	now := at(0)
+	h := true
+	src := &fakeSource{
+		orgs:  []string{"alterminal"},
+		repos: map[string][]Repo{"alterminal": {{Name: "teai", HasPullRequests: &h}}},
+		pulls: map[string][]PullRequest{
+			"alterminal/teai": {
+				{Number: 10, User: &User{UserName: "max"}, CreatedAt: iso(-600), UpdatedAt: iso(-600)},
+				{Number: 11, User: &User{UserName: "max"}, CreatedAt: iso(-600), UpdatedAt: iso(-300), RequestedReviewers: []User{{UserName: "ceo"}}},
+				{Number: 12, User: &User{UserName: "max"}, CreatedAt: iso(-600), UpdatedAt: iso(-300), RequestedReviewers: []User{{UserName: "ceo"}}},
+				{Number: 13, User: &User{UserName: "max"}, CreatedAt: iso(-600), UpdatedAt: iso(-300), RequestedReviewers: []User{{UserName: "ceo"}}},
+			},
+		},
+		comments: map[string][]Comment{
+			"alterminal/teai/11": {{User: &User{UserName: "max"}, CreatedAt: iso(-300)}}, // author-idle
+			"alterminal/teai/12": {{User: &User{UserName: "ceo"}, CreatedAt: iso(-300)}}, // reviewer-idle
+			"alterminal/teai/13": {{User: &User{UserName: "dan"}, CreatedAt: iso(-300)}}, // no-commenter（外部留言）
+		},
+	}
+	got, err := ScanStalled(src, "admin", 4.0, now)
+	if err != nil {
+		t.Fatalf("ScanStalled: %v", err)
+	}
+	byNumber := map[int64]Item{}
+	for _, it := range got {
+		byNumber[it.Number] = it
+	}
+	for n, wantReason := range map[int64]string{10: "no-reviewer", 11: "author-idle", 12: "reviewer-idle", 13: "no-commenter"} {
+		item, ok := byNumber[n]
+		if !ok {
+			t.Fatalf("PR %d 應列入，got %v", n, got)
+		}
+		if item.Reason != wantReason {
+			t.Errorf("PR %d reason = %q, want %q", n, item.Reason, wantReason)
+		}
+	}
+	if len(got) != 4 {
+		t.Fatalf("應 4 筆，got %d", len(got))
+	}
+	if byNumber[10].Author != "max" {
+		t.Errorf("PR 10 author 應為 max，got %q", byNumber[10].Author)
+	}
+}
+
+// TestScanStalledNoPullsFlag 停用 PR 的倉庫仍掃 issues，只跳過 PR。
+func TestScanStalledNoPullsFlag(t *testing.T) {
+	now := at(0)
+	h := false
+	src := &fakeSource{
+		orgs:  []string{"alterminal"},
+		repos: map[string][]Repo{"alterminal": {{Name: "docs", HasPullRequests: &h}}},
+		issues: map[string]map[int64]Issue{
+			"alterminal/docs": {
+				1: {Number: 1, State: "open", CreatedAt: iso(-600), UpdatedAt: iso(-600), Repository: &Repository{FullName: "alterminal/docs"}},
+			},
+		},
+		pulls: map[string][]PullRequest{
+			// 即使假資料有 PR，flag 關閉也不應掃。
+			"alterminal/docs": {{Number: 2, User: &User{UserName: "max"}, CreatedAt: iso(-600), UpdatedAt: iso(-600)}},
+		},
+	}
+	got, err := ScanStalled(src, "admin", 4.0, now)
+	if err != nil {
+		t.Fatalf("ScanStalled: %v", err)
+	}
+	if len(got) != 1 || got[0].Number != 1 || got[0].Type != "issue" {
+		t.Fatalf("應只有 issue 1，got %v", got)
+	}
+}
+
+// TestScanStalledSkipsPRsInIssues 確認 /issues 混入的 PR 會被過濾。
+func TestScanStalledSkipsPRsInIssues(t *testing.T) {
+	now := at(0)
+	src := &fakeSource{
+		orgs:  []string{"alterminal"},
+		repos: map[string][]Repo{"alterminal": repoWith("teai", true)},
+		issues: map[string]map[int64]Issue{
+			"alterminal/teai": {
+				1: {Number: 1, State: "open", CreatedAt: iso(-600), UpdatedAt: iso(-600), Repository: &Repository{FullName: "alterminal/teai"}, PullRequest: &pullMarker{}},
+			},
+		},
+	}
+	got, err := ScanStalled(src, "admin", 4.0, now)
+	if err != nil {
+		t.Fatalf("ScanStalled: %v", err)
+	}
+	if len(got) != 0 {
+		t.Fatalf("/issues 混入的 PR 應過濾，got %v", got)
+	}
+}
+
+// TestItemJSON 與 gitea.py 的 JSON 位元組相容（鍵序、HTML 不轉義、48.0、null）。
+func TestItemJSON(t *testing.T) {
+	ts := at(-600)
+	activity := FormatMoment(ts)
+	item := Item{
+		Type: "issue", Repo: "alterminal/teai", Number: 7, Title: "R,D <v2> & 規劃", URL: "u",
+		Assignees: []string{"ceo"}, LastCommentBy: "max",
+		LastActivityAt: ts, StalledHours: 48, Reason: "assignee-idle",
+		ChildActivity: []Child{
+			{Repo: "alterminal/teai", Number: 3, Title: "父", State: "open", LastActivityAt: &activity},
+			{Repo: "alterminal/teai", Number: 4, Title: "無時刻", State: "open"},
+		},
+	}
+	// json.Marshal 會把 <、>、& 重新轉義，必須用停用 HTML 轉義的編碼器。
+	var buf bytes.Buffer
+	enc := json.NewEncoder(&buf)
+	enc.SetEscapeHTML(false)
+	if err := enc.Encode(item); err != nil {
+		t.Fatalf("Encode: %v", err)
+	}
+	got := strings.TrimSuffix(buf.String(), "\n")
+	want := `{"type":"issue","repo":"alterminal/teai","number":7,"title":"R,D <v2> & 規劃","url":"u","assignees":["ceo"],"last_comment_by":"max","last_activity_at":"2026-09-09T22:00:00+00:00","stalled_hours":48.0,"reason":"assignee-idle","child_activity":[{"repo":"alterminal/teai","number":3,"title":"父","state":"open","last_activity_at":"2026-09-09T22:00:00+00:00"},{"repo":"alterminal/teai","number":4,"title":"無時刻","state":"open","last_activity_at":null}]}`
+	if got != want {
+		t.Fatalf("JSON 位元組不相容:\n got %s\nwant %s", got, want)
+	}
+}
+
+// TestPullJSON：pull 的鍵序（author、reviewers）與非整數 stalled_hours。
+func TestPullJSON(t *testing.T) {
+	item := Item{
+		Type: "pull", Repo: "alterminal/teai", Number: 12, Title: "t", URL: "u",
+		Author: "ceo", Reviewers: []string{"queena"},
+		LastActivityAt: at(-600), StalledHours: 10.44, Reason: "reviewer-idle",
+	}
+	b, err := json.Marshal(item)
+	if err != nil {
+		t.Fatalf("Marshal: %v", err)
+	}
+	got := string(b)
+	want := `{"type":"pull","repo":"alterminal/teai","number":12,"title":"t","url":"u","author":"ceo","reviewers":["queena"],"last_comment_by":"","last_activity_at":"2026-09-09T22:00:00+00:00","stalled_hours":10.4,"reason":"reviewer-idle"}`
+	if got != want {
+		t.Fatalf("JSON 位元組不相容:\n got %s\nwant %s", got, want)
+	}
+}
+
+// TestScanStalledEmpty 無停滯項目 → 空輸出（CLI 層輸出 []）。
+func TestScanStalledEmpty(t *testing.T) {
+	now := at(0)
+	src := &fakeSource{orgs: []string{"alterminal"}, repos: map[string][]Repo{"alterminal": repoWith("teai", true)}}
+	got, err := ScanStalled(src, "admin", 4.0, now)
+	if err != nil {
+		t.Fatalf("ScanStalled: %v", err)
+	}
+	if len(got) != 0 {
+		t.Fatalf("應空，got %v", got)
+	}
+}
+
+// TestScanStalledOrgError 組織層錯誤應回傳（不靜默）。
+func TestScanStalledOrgError(t *testing.T) {
+	src := &errSource{}
+	if _, err := ScanStalled(src, "admin", 4.0, at(0)); err == nil {
+		t.Fatal("組織清單失敗應回傳錯誤")
+	}
+}
+
+type errSource struct{}
+
+func (errSource) MyOrganizations() ([]string, error) { return nil, errors.New("boom") }
+func (e errSource) OrganizationRepositories(string) ([]Repo, error) {
+	return nil, errors.New("boom")
+}
+func (e errSource) OpenIssues(string, string) ([]Issue, error)      { return nil, errors.New("boom") }
+func (e errSource) OpenPulls(string, string) ([]PullRequest, error) { return nil, errors.New("boom") }
+func (e errSource) IssueComments(string, string, int64) ([]Comment, error) {
+	return nil, errors.New("boom")
+}
+func (e errSource) TryGetIssue(string, string, int64) (Issue, bool, error) {
+	return Issue{}, false, errors.New("boom")
+}
+
+// TestRound1 round1 十進位舍入到一位小數（與 Python round(x,1) 半偶數一致）。
+func TestRound1(t *testing.T) {
+	cases := []struct {
+		in   float64
+		want float64
+	}{
+		{10.44, 10.4}, {10.46, 10.5}, {10.0, 10.0},
+		// 半偶數（與 Python round(x,1) 對二進位真值的行為一致）：
+		// 10.45、5.25、5.15 的二進位真值都略低於表值 → 舍到偶數位。
+		{10.45, 10.4}, {0.05, 0.1}, {5.25, 5.2}, {5.15, 5.2},
+	}
+	for _, tc := range cases {
+		if got := round1(tc.in); got != tc.want {
+			t.Errorf("round1(%v) = %v, want %v", tc.in, got, tc.want)
+		}
+	}
+}