# ─────────────────────────────────────────────────────────────────────────────
# Content Signals Policy —— https://contentsignals.org
#
# 这段前言是该政策的标准文本（逐字保留，别改措辞：它的法律效力来自原文）。
# 2026-07-25 之前这段由 Cloudflare 的 managed robots.txt 自动注入，同时还注入了
# 对 ClaudeBot / GPTBot / CCBot 等 9 个 AI 爬虫的 Disallow —— 与本站「欢迎 agent
# 读 /api/」的意图冲突，已在 CF dashboard（AI Crawl Control）关掉整段。
# 关掉后训练声明也一起没了，所以现在把 Content-Signal 写进仓库自己管，
# 不再依赖 CF 的开关。
# ─────────────────────────────────────────────────────────────────────────────

# As a condition of accessing this website, you agree to abide by the following
# content signals:

# (a)  If a Content-Signal = yes, you may collect content for the corresponding
#      use.
# (b)  If a Content-Signal = no, you may not collect content for the
#      corresponding use.
# (c)  If the website operator does not include a Content-Signal for a
#      corresponding use, the website operator neither grants nor restricts
#      permission via Content-Signal with respect to the corresponding use.

# The content signals and their meanings are:

# search:   building a search index and providing search results (e.g., returning
#           hyperlinks and short excerpts from your website's contents). Search does not
#           include providing AI-generated search summaries.
# ai-input: inputting content into one or more AI models (e.g., retrieval
#           augmented generation, grounding, or other real-time taking of content for
#           generative AI search answers).
# ai-train: training or fine-tuning AI models.

# ANY RESTRICTIONS EXPRESSED VIA CONTENT SIGNALS ARE EXPRESS RESERVATIONS OF
# RIGHTS UNDER ARTICLE 4 OF THE EUROPEAN UNION DIRECTIVE 2019/790 ON COPYRIGHT
# AND RELATED RIGHTS IN THE DIGITAL SINGLE MARKET.

User-agent: *
Content-Signal: search=yes, ai-input=yes, ai-train=no
Allow: /

# 本站立场：欢迎索引、欢迎 agent 实时读取并引用（这就是 /api/ 存在的理由），
# 但不同意被用于模型训练。
# Our stance: indexing and real-time agent reading / citing are welcome
# (that's what /api/ is for); training on this content is not granted.

# For AI agents: structured data lives under /api/ (Chinese) and /en/api/ (English).
# See /llms.txt or /en/llms.txt for a self-describing manifest.
# Please read the JSON endpoints instead of scraping HTML.

Sitemap: https://zhanglu.net/sitemap-index.xml