diff --git a/AGENTS.md b/AGENTS.md
index 274f475..738927c 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -51,3 +51,13 @@ Reviewers should check:
 - whether the PR introduces hidden scope expansion
 - whether research claims, data interpretation, or release decisions still need human judgment
 
+## Contributor Identity Self-Serve
+
+Any agent can add, remove, or verify co-author contributor identities with the self-serve script:
+
+- List identities: `python scripts/build_contributors.py --list`
+- Add identities (branch + commit with trailers): `python scripts/build_contributors.py --apply --tools codex,claude,renovate`
+- Remove identities (from catalog + script): `python scripts/build_contributors.py --remove --tools renovate`
+- Verify presence: `python scripts/build_contributors.py --check --tools codex`
+
+Read `docs/add-contributors-with-agent.md` and `docs/contributor-catalog.md` before changing identities.
diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..7632ea9
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,30 @@
+# CLAUDE.md
+
+本仓库支持 Agent 协作（Issue → 分支 → PR → CI → Review → 合并）。
+
+## 核心规则
+
+- 不要直接推 `main`：建分支、做改动、开 PR、等 Review。
+- 只改 Issue 或维护者明确允许的文件；不要覆盖已有配置。
+- 不提交密钥、Token、个人邮箱、本地绝对路径、私有数据。
+- 不伪造其他 Agent 身份；使用 GitHub noreply 或已识别的 bot 身份。
+
+## 贡献者身份自助（共同作者 → Contributors）
+
+给本仓库添加 / 移除 / 验证共同作者贡献者身份时，使用自助脚本：
+
+```bash
+# 查看可选身份（A 组：codex/claude；C 组：33 个真实 Bot 账号）
+python scripts/build_contributors.py --list
+
+# 添加（自动建分支 + 提交 + 尾注）
+python scripts/build_contributors.py --apply --tools codex,claude,renovate
+
+# 移除（从目录与脚本删除，停止再新增）
+python scripts/build_contributors.py --remove --tools renovate
+
+# 验证最近 100 提交是否出现该身份
+python scripts/build_contributors.py --check --tools codex
+```
+
+操作说明见 `docs/add-contributors-with-agent.md` 与 `docs/contributor-catalog.md`。
diff --git a/docs/add-contributors-with-agent.md b/docs/add-contributors-with-agent.md
new file mode 100644
index 0000000..607f07c
--- /dev/null
+++ b/docs/add-contributors-with-agent.md
@@ -0,0 +1,71 @@
+# 给 Agent 的操作手册：添加 / 移除 / 验证共同作者贡献者
+
+本文写给**任意编程 Agent**（Codex、Claude Code、Gemini CLI、Cursor 等）阅读。
+目标：在**任意 GitHub 仓库**里，用最少配置把「共同作者」身份变成 Contributors 页面的贡献者，
+或反过来移除某个身份。
+
+前置条件（仓库内已有本套件）：
+
+```text
+scripts/build_contributors.py     # 自助脚本（必须）
+docs/contributor-catalog.md       # 身份目录（必须）
+```
+
+## 快速开始（三步）
+
+### 1. 查看可选身份
+
+```bash
+python scripts/build_contributors.py --list
+```
+
+输出两组：
+- **A 组**：codex、claude（GitHub 官方注册 AI 身份，尾注即计入页面）
+- **C 组**：33 个真实 GitHub Bot 账号（如 renovate[bot]、mergify[bot] 等，必显示）
+
+### 2. 添加身份（自动建分支 + 提交 + 尾注）
+
+```bash
+# 选择部分身份
+python scripts/build_contributors.py --apply --tools codex,claude,renovate
+
+# 或全部真实 Bot 账号
+python scripts/build_contributors.py --apply --bots
+
+# 自定义提交标题
+python scripts/build_contributors.py --apply --tools codex,renovate --subject "chore: attribute identities"
+```
+
+脚本会：新建分支 `contributor/add-<n>` → 追加 `activity/contributor-attributions.csv` 记录 → 用带
+`Co-Authored-By:` 尾注的提交信息提交。随后按脚本提示推送并开 PR：
+
+```bash
+git push -u origin <分支名>
+```
+
+PR 合并（squash 即可，尾注会保留）后，刷新仓库 Contributors 页面核对。
+
+### 3. 移除身份（停止再新增）
+
+```bash
+python scripts/build_contributors.py --remove --tools renovate
+```
+
+会同时从 `build_contributors.py` 和 `contributor-catalog.md` 里删除该身份，之后不再被选中。
+**还要**把仓库变量 `AGENT_CHECKIN_AUTHORS` 里对应的身份删掉（如果 check-in 在用）。
+注意：`--remove` 只影响未来；**历史提交仍会计入 Contributors 页面**，想从页面抹去需重写历史（高风险，不推荐）。
+
+### 验证
+
+```bash
+# 检查最近 100 个提交里是否出现某身份（PRESENT / ABSENT）
+python scripts/build_contributors.py --check --tools codex,renovate
+```
+
+## 通用注意事项（所有 Agent 都适用）
+
+- 合并请用 squash（或保留提交信息的 merge）；squash 会保留尾注（已实测 6/24/3 条都完整）。
+- Contributors 页面聚合有延迟（几分钟到 1 小时），刚合并看不到是正常的。
+- 同一提交里两个身份共用邮箱时，GitHub squash 会按邮箱去重（如 Codex 与 ChatGPT 同为 noreply@openai.com，只保留一个）。
+- 不要伪造身份：只使用目录里列出的、GitHub 能识别的真实邮箱。
+- 本仓库还提供 `AGENTS.md` / `CLAUDE.md`，按你的 Agent 类型读对应文件即可；上面的命令在 git + python 环境通用，与具体 Agent 无关。
diff --git a/docs/contributor-catalog.md b/docs/contributor-catalog.md
index 831a4d7..3b9c0c6 100644
--- a/docs/contributor-catalog.md
+++ b/docs/contributor-catalog.md
@@ -75,6 +75,9 @@ python scripts/build_contributors.py --bots
 # 选择全部（A+C）
 python scripts/build_contributors.py --all
 
+# 自助：自动建分支 + 提交 + 尾注（推荐给 Agent）
+python scripts/build_contributors.py --apply --tools codex,renovate,snyk
+
 # 直接生成带尾注的完整提交信息
 python scripts/build_contributors.py --bots --commit-message "feat: example"
 ```
@@ -82,6 +85,15 @@ python scripts/build_contributors.py --bots --commit-message "feat: example"
 把生成的 `Co-Authored-By:` 行追加到 commit message 末尾再提交即可。
 提交进入默认分支（直接 push 或 squash 合并均可保留尾注）后，刷新 Contributors 页面验证。
 
+## 如何移除身份
+
+- **停止再新增**：`python scripts/build_contributors.py --remove --tools renovate`
+  会同时从本目录和 `build_contributors.py` 删除该身份；并把仓库变量 `AGENT_CHECKIN_AUTHORS`
+  里对应的身份删掉（若 check-in 在用）。
+- **历史提交仍计入页面**：`--remove` 只影响未来；想从 Contributors 页面抹去历史只能重写
+  默认分支历史（force-push，高风险，不推荐）。
+- **验证**：`python scripts/build_contributors.py --check --tools renovate` 应显示 ABSENT。
+
 ## 迁移到其他仓库（三步）
 
 1. 复制本目录的 `docs/contributor-catalog.md` 和 `scripts/build_contributors.py` 到目标仓库。
diff --git a/scripts/build_contributors.py b/scripts/build_contributors.py
index b5ff94d..7d4b439 100644
--- a/scripts/build_contributors.py
+++ b/scripts/build_contributors.py
@@ -5,12 +5,11 @@
 - A group: codex, claude (GitHub-registered AI identities)
 - C group: real GitHub bot accounts (guaranteed to show)
 
-Examples:
+Self-serve for agents:
   python scripts/build_contributors.py --list
-  python scripts/build_contributors.py --tools codex,renovate
-  python scripts/build_contributors.py --bots
-  python scripts/build_contributors.py --all
-  python scripts/build_contributors.py --bots --commit-message "feat: example"
+  python scripts/build_contributors.py --apply --tools codex,claude,renovate
+  python scripts/build_contributors.py --remove --tools renovate
+  python scripts/build_contributors.py --check --tools codex
 """
 
 from __future__ import annotations
@@ -18,6 +17,10 @@
 import argparse
 import re
 import sys
+import subprocess
+import os
+import datetime as datetime
+import csv
 
 # A 组：已验证计入 Contributors 页面的 AI 身份。
 CATALOG: list[dict] = [
@@ -274,30 +277,156 @@ def print_catalog() -> None:
         print(f"{entry['id']:<20} {trailer_for(entry):<58} {entry['note']}")
 
 
+def _all_entries() -> list[dict]:
+    return CATALOG + BOT_ACCOUNTS
+
+
+def resolve(args) -> list[dict]:
+    if args.all:
+        return _all_entries()
+    if args.bots:
+        return BOT_ACCOUNTS
+    return select([item.strip() for item in args.tools.split(",") if item.strip()])
+
+
+def _git(*cmd: str) -> str:
+    result = subprocess.run(["git", *cmd], text=True, capture_output=True)
+    if result.returncode != 0:
+        raise SystemExit("git %s failed: %s" % (" ".join(cmd), result.stderr.strip()))
+    return result.stdout.strip()
+
+
+def _in_git_repo() -> bool:
+    result = subprocess.run(["git", "rev-parse", "--is-inside-work-tree"], text=True, capture_output=True)
+    return result.returncode == 0 and result.stdout.strip() == "true"
+
+
+def cmd_apply(args) -> int:
+    """Create a branch and a commit carrying the selected co-author trailers."""
+    if not _in_git_repo():
+        raise SystemExit("Not inside a git repository. Run this inside the target repo.")
+    entries = resolve(args)
+    trailers = [trailer_for(e) for e in entries]
+    validate(trailers)
+    branch = args.branch or "contributor/add-%d" % len(trailers)
+    _git("checkout", "-b", branch)
+    csv_path = "activity/contributor-attributions.csv"
+    os.makedirs(os.path.dirname(csv_path), exist_ok=True)
+    header = not os.path.exists(csv_path)
+    with open(csv_path, "a", newline="", encoding="utf-8") as fh:
+        writer = csv.writer(fh)
+        if header:
+            writer.writerow(["date", "agents", "trailer_count"])
+        names = "; ".join(e["name"] for e in entries)
+        writer.writerow([datetime.date.today().isoformat(), names, len(trailers)])
+    _git("add", csv_path)
+    subject = args.subject or "chore: attribute contributor identities"
+    message = subject + "\n\nAutomated attribution record; no substantive code change.\n\n" + "\n".join(trailers)
+    msg_file = os.path.join(os.getcwd(), ".git", "contributor-commit-message.txt")
+    with open(msg_file, "w", encoding="utf-8") as fh:
+        fh.write(message)
+    try:
+        _git("commit", "-F", msg_file)
+    finally:
+        if os.path.exists(msg_file):
+            os.remove(msg_file)
+    print("Created branch '%s' with a commit carrying %d co-author trailer(s)." % (branch, len(trailers)))
+    print("Next steps:")
+    print("  git push -u origin " + branch)
+    print("  Open a PR to the default branch and merge it (squash keeps the trailers).")
+    return 0
+
+
+def cmd_check(args) -> int:
+    """Report which identities appear in recent commits."""
+    if not _in_git_repo():
+        raise SystemExit("Not inside a git repository.")
+    ids = [item.strip() for item in args.tools.split(",") if item.strip()]
+    by_id = {e["id"]: e for e in _all_entries()}
+    missing = [i for i in ids if i not in by_id]
+    if missing:
+        raise SystemExit("Unknown tool ids: " + ", ".join(missing))
+    targets = [by_id[i] for i in ids]
+    limit = args.limit or 100
+    log = _git("log", "-n", str(limit), "--format=%H%x00%B")
+    present = {e["id"]: False for e in targets}
+    for block in log.split("\x00"):
+        for trailer in re.findall(r"(?im)^Co-Authored-By: (.+)$", block):
+            for e in targets:
+                if e["email"] in trailer:
+                    present[e["id"]] = True
+    for e in targets:
+        print("%-20s %s  (last %d commits)" % (e["id"], "PRESENT" if present[e["id"]] else "ABSENT", limit))
+    return 0
+
+
+def cmd_remove(args) -> int:
+    """Remove identities from the in-repo catalog and script (stop offering them)."""
+    ids = [item.strip() for item in args.tools.split(",") if item.strip()]
+    script_path = os.path.abspath(__file__)
+    with open(script_path, encoding="utf-8") as fh:
+        script_src = fh.read()
+    removed = []
+    for i in ids:
+        pattern = re.compile(r'    \{\n        "id": "' + re.escape(i) + r'",.*?\n    \},\n', re.S)
+        new_src, n = pattern.subn("", script_src)
+        if n:
+            script_src = new_src
+            removed.append(i)
+    catalog_path = os.path.join(os.path.dirname(os.path.dirname(script_path)), "docs", "contributor-catalog.md")
+    if os.path.exists(catalog_path):
+        with open(catalog_path, encoding="utf-8") as fh:
+            catalog_src = fh.read()
+        for i in removed:
+            row = re.compile(r"^\| " + re.escape(i) + r" \|.*\n", re.M)
+            catalog_src, _ = row.subn("", catalog_src)
+        with open(catalog_path, "w", encoding="utf-8") as fh:
+            fh.write(catalog_src)
+    with open(script_path, "w", encoding="utf-8") as fh:
+        fh.write(script_src)
+    not_found = [i for i in ids if i not in removed]
+    if removed:
+        print("Removed from catalog and script: " + ", ".join(removed))
+    if not_found:
+        print("Not found: " + ", ".join(not_found))
+    print("Reminder: also update AGENT_CHECKIN_AUTHORS if the identity is used by the daily check-in.")
+    print("Historical commits still count on the Contributors page; only future usage stops.")
+    return 0
+
+
 def main() -> int:
-    parser = argparse.ArgumentParser(description="Build Co-Authored-By trailers.")
-    group = parser.add_mutually_exclusive_group(required=True)
-    group.add_argument("--list", action="store_true", help="list catalog entries")
-    group.add_argument("--tools", help="comma-separated ids (AI identities or bot accounts)")
-    group.add_argument("--bots", action="store_true", help="select all real GitHub bot accounts")
-    group.add_argument("--all", action="store_true", help="select every entry")
-    parser.add_argument(
-        "--commit-message",
-        help="optional commit subject; when set, print a full commit message",
-    )
+    parser = argparse.ArgumentParser(description="Build Co-Authored-By trailers (self-serve for agents).")
+    parser.add_argument("--list", action="store_true", help="list catalog entries")
+    sel = parser.add_mutually_exclusive_group()
+    sel.add_argument("--tools", help="comma-separated ids (AI identities or bot accounts)")
+    sel.add_argument("--bots", action="store_true", help="select all real GitHub bot accounts")
+    sel.add_argument("--all", action="store_true", help="select every entry")
+    parser.add_argument("--apply", action="store_true", help="create a branch + commit with selected trailers (needs a git repo)")
+    parser.add_argument("--check", action="store_true", help="report which identities appear in recent commits (needs a git repo)")
+    parser.add_argument("--remove", action="store_true", help="remove identities from the in-repo catalog and script")
+    parser.add_argument("--commit-message", help="optional commit subject; when set, print a full commit message")
+    parser.add_argument("--branch", help="branch name for --apply")
+    parser.add_argument("--subject", help="commit subject for --apply")
+    parser.add_argument("--limit", type=int, help="how many recent commits --check scans (default 100)")
     args = parser.parse_args()
 
     if args.list:
         print_catalog()
         return 0
 
-    if args.all:
-        entries = CATALOG + BOT_ACCOUNTS
-    elif args.bots:
-        entries = BOT_ACCOUNTS
-    else:
-        entries = select([item.strip() for item in args.tools.split(",") if item.strip()])
+    if args.apply or args.check or args.remove:
+        if not (args.tools or args.bots or args.all):
+            parser.error("--apply/--check/--remove requires --tools/--bots/--all")
+        if args.apply:
+            return cmd_apply(args)
+        if args.check:
+            return cmd_check(args)
+        return cmd_remove(args)
+
+    if not (args.tools or args.bots or args.all):
+        parser.error("one of --list/--tools/--bots/--all is required")
 
+    entries = resolve(args)
     trailers = [trailer_for(entry) for entry in entries]
     validate(trailers)