Baoyu Wechat Summary

WeChat Group Summary

群聊精华提取专家。把零散的微信群聊记录提炼成结构化、可读性强的简报，并维护跨次运行的群聊历史与群友画像。底层依赖外部 wx-cli 二进制（wx 命令），不打包脚本。

⚠️ Sandbox restriction

wx-cli reads from ~/.wx-cli/ (config, cache, daemon socket) and from WeChat's data directory (~/Library/Containers/com.tencent.xinWeChat/ on macOS). Both paths are outside Claude Code's default sandbox. Every wx command in this skill needs to run with dangerouslyDisableSandbox: true from the start — don't waste a sandbox attempt first. The user can use /sandbox to view/edit restrictions.

User Input Tools

When this skill prompts the user, follow this tool-selection rule (priority order):

1. Prefer built-in user-input tools exposed by the current agent runtime — e.g., AskUserQuestion, request_user_input, clarify, ask_user, or any equivalent.
2. Fallback: if no such tool exists, emit a numbered plain-text message and ask the user to reply with the chosen number/answer for each question.
3. Batching: if the tool supports multiple questions per call, combine all applicable questions into a single call; if only single-question, ask them one at a time in priority order.

Concrete AskUserQuestion references below are examples — substitute the local equivalent in other runtimes.

Prerequisites

Before invoking the workflow, verify the environment. Run these checks in order; stop at the first failure and surface the exact next command the user needs.

1. wx-cli installed — run wx --version. If missing, tell the user to install it themselves (npm install -g @jackwener/wx-cli or use one of the alternatives at https://github.com/jackwener/wx-cli). Do NOT auto-install — this repo forbids piped/silent installs.
2. ~/.wx-cli directory owned by the current user — sudo wx init historically chowned this directory to root, which breaks every subsequent non-sudo wx call. Check:

   ls -la ~/.wx-cli/ 2>/dev/null | head -5
   

   If the directory exists but the owner is root (or anything other than $(whoami)), tell the user to repair it themselves:

   sudo chown -R $(whoami) ~/.wx-cli
   sudo rm -f ~/.wx-cli/daemon.pid ~/.wx-cli/daemon.sock
   wx daemon start
   

   The skill should NOT run sudo on the user's behalf.
3. wx-cli initialized — wx sessions should return data. If it fails with "no keys" / "init required", instruct the user to run wx init while WeChat is running (on macOS, codesign --force --deep --sign - /Applications/WeChat.app first). Prefer non-sudo init; only fall back to sudo wx init if the user's wx-cli version requires it — and warn them that they'll need step 2's chown after.
4. WeChat 4.x running and logged in — required for the daemon to find data files.

Preferences (EXTEND.md)

Check EXTEND.md in priority order — the first one found wins:

Supported keys

EXTEND.md is plain text with key: value or key=value lines, # for comments, case-insensitive keys.

A starter template lives at EXTEND.md.example.

First-Time Setup (BLOCKING)

If no EXTEND.md is found, do NOT silently proceed.

Step A — Try to auto-discover self_wxid and self_display first. Run (in order, stop at the first that succeeds):

# 1. If wx-cli exposes a whoami, use it
wx whoami --json 2>/dev/null

# 2. Otherwise, find self-sent messages in recent sessions
wx sessions --json --limit 20 2>/dev/null

For option 2, scan the sessions for any private/group thread the user has sent into and read one of their own from_wxid / from_nickname pairs. If you can confidently pre-fill both values, use them as defaults in the question below; otherwise leave the fields blank for the user to fill in.

Step B — Confirm with one AskUserQuestion call (batched), pre-filling whatever auto-discovery found:

• self_wxid (e.g., wxid_abc123) — fall-back hint: the user can find it with wx contacts --query "<own nickname>", or by inspecting any of their own sent messages in wx sessions --json
• self_display (e.g., 宝玉) — how they want their messages attributed
• default_version — pick one of normal / roast / both
• data_root — where digest folders live. Default: {project_root}/wechat. Enter a custom absolute path (e.g. ~/Documents/wechat-digests) or leave blank for default.
• Save location — pick one of project / XDG / home

Write EXTEND.md to the chosen path. If the user provided a non-default data_root, include it as an uncommented line; otherwise omit it (the default applies automatically). Confirm "Preferences saved to [path]. Edit it any time to change defaults.", then continue with the digest workflow.

Workflow

Step 1: Parse the user's request

Extract:

• Group name (or partial name for fuzzy matching)
• Time range — interpret flexibly:
  • "最近 1 天" / "今天" / "last 24 hours" → 1 day
  • "最近 3 天" → 3 days
  • "最近 7 天" / "这周" → 7 days
  • "最近 30 天" / "最近一个月" → 30 days
  • "某天" (e.g. "3 月 5 号") → that specific date
  • "某天到某天" (e.g. "3 月 1 号到 3 月 5 号") → date range
  • "从上次开始" / "继续" / "接着上次" / "since last" → incremental mode: read history.json for this group, use last_digest.last_message_time as the start
  • No time specified → incremental mode. If no history.json exists yet, fall back to default_time_range from EXTEND.md if set, else last 24 hours.
• Version(s) to generate:
  • Start from default_version in EXTEND.md.
  • User request overrides: keywords "毒舌"/"roast"/"挑衅"/"再来个毒的"/"sass" → force include_roast=true. Keywords "只要正经的"/"normal only"/"不要毒舌" → force include_normal=true, include_roast=false. "都来一份"/"两个版本都要"/"both" → both.
  • At least one of include_normal/include_roast must end up true.

Convert relative ranges into absolute --since YYYY-MM-DD --until YYYY-MM-DD pairs using today's local date.

Step 2: Find the group + resolve folder path

wx contacts --query "<group_name>" --json

Filter for entries whose username ends in @chatroom. If multiple groups match, use AskUserQuestion to disambiguate. If none match, fall back to wx sessions --json and search there before asking the user.

Once resolved, compute the folder path:

{data_root}/{group_id}-{sanitized_group_name}/

where data_root is from EXTEND.md (default {project_root}/wechat).

Sanitize the group name — replace any of / \ : * ? " < > | NUL and control characters with _. Trim trailing dots and whitespace. Don't strip emoji or Chinese characters.

Group-rename detection: list existing folders under {data_root}/ and find any folder whose name starts with {group_id}-. If one exists but the suffix differs (group was renamed), rename the existing folder to the new {group_id}-{sanitized_new_name} form. If a target with the new name already exists (rare), keep both and prefer the existing one for this run.

Step 3: Fetch messages

For small batches (single-day digest, typically < 200 messages), pipe JSON into the agent directly:

wx history "<group_name_or_id>" --since YYYY-MM-DD --until YYYY-MM-DD -n 5000 --json

For large batches (weekly / monthly digests, > 200 messages), redirect to $TMPDIR first so the raw payload never sits in conversation context:

wx history "<group_name_or_id>" --since YYYY-MM-DD --until YYYY-MM-DD -n 5000 --json > "$TMPDIR/wx-messages.json"
wc -c "$TMPDIR/wx-messages.json"
jq 'length' "$TMPDIR/wx-messages.json"

Then read the file in slices via Read with offset + limit, or process with jq queries (e.g. jq '.[0:200]', jq '[.[] | {id, from_nickname, timestamp, content: (.content | .[0:50])}]' for a lightweight skeleton pass). Reading all 500+ messages at once will burn token budget unnecessarily.

Notes:

• --since is inclusive; --until is interpreted as a date (the whole day). If the user asked for "today only", set both to today.
• -n 5000 is a defensive cap; for very active groups, raise it and re-fetch.
• Filter the returned messages by their timestamp to be safe (some daemons may return adjacent days).
• Range splitting: for ranges > 7 days OR > 500 messages, prefer generating per-3-day digests and then a meta-summary over forcing one giant digest — the categorization quality degrades sharply past a week's worth of unrelated topics.

Incremental mode: after the fetch, drop any message whose timestamp is <= the last_message_time from history.json. If zero messages remain, tell the user "上次摘要后没有新消息，已跳过生成" and exit.

Step 3.5: Parse the message schema

wx history --json returns an array of message objects. Use the fields that are present; tolerate missing fields:

• id / msg_id / local_id — message identifier (use whichever wx-cli emits). Reference IDs in working notes as anchors when building the skeleton.
• from_wxid — stable sender identifier
• from_nickname — display name (may be the group remark or original nickname)
• content — text payload. Examples:
  • Plain text → use as-is
  • [图片] → opaque placeholder; see image handling below
  • [表情] → emoji/sticker; skip in body unless surrounded by discussion
  • [视频] / [文件] → media reference; skip unless discussed
  • [链接] <title> or [链接/文件] <title> → shared article; the title IS the information — quote it and credit the sharer
  • [系统] ... revokemsg → revoked; exclude from digest and from leaderboard
• timestamp — convert to MM-DD HH:MM for display (and use full ISO for generated_at)
• chat_type — sanity-check group
• Quote/reply — try quote_id, reply_to, quoted_msg_id, or any nested quote object. If present, use it as strong attribution. If absent, fall back to context but flag the inferred link as uncertain.

Step 3.6: Resolve self + ambiguous nicknames

• Substitute self_display for every message whose from_wxid matches self_wxid (from EXTEND.md). Apply this in the leaderboard, portraits, and body text. The user MUST appear under their real display name and count toward stats — never skip them.
• Scan all unique senders for ambiguous handles: ≤2 characters, common programming words (nil, null, test, admin, user, undefined), single emoji, or otherwise low-information. For each, run wx contacts --query "<nick>" --json --limit 5 and pick a meaningful name in this priority: remark > nickname > wxid. Apply the substitution everywhere in the digest.

Step 3.7: Load user profiles

For each unique sender appearing in this batch:

• Look in {folder}/profiles/{wxid}-*.md by wxid prefix match. Read the matched file if found.
• If include_roast, also look in {folder}/profiles-roast/{wxid}-*.md for the roast pass.

Compile a condensed profile context block as internal working memory — do NOT write it into the final digest. Example shape:

== 群友历史画像（来自 profiles/）==
K. H：空中直播员 / 生活百科全书。常见话题：旅行、金融、美食。经典金句："要不要买moderna"。
可可苏玛：...

Rules:

• Only load profiles for users active in this batch — never preload everyone.
• Profile is background, not template. Current messages are still the primary source.
• Use historical labels for continuity ("又双叒叕化身空中直播员") or contrast ("一向省钱的 XX 今天居然...").
• Strict separation: normal pass reads only profiles/, roast pass reads only profiles-roast/. Never cross-load.

See references/profiles.md for the full file format.

Step 3.8: Detect existing in-chat digests (optional)

Some users (e.g., the original 宝玉 workflow) post digests directly into the group as messages. If we don't notice these, the new digest will re-cover the same ground.

Scan the fetched messages for signals of a prior in-chat digest:

• from_wxid == self_wxid AND
• content contains 群聊精华 OR 消息统计: OR 📊 消息统计 OR a leaderboard pattern (e.g. ^\d+\. .+: \d+ 条), AND
• content length > 1500 chars.

If a match is found:

1. Extract the digest's covered date or range from the title line (e.g., xxx 群聊精华 · 2026-05-12 or ... · 2026-05-10 ~ 2026-05-12).
2. Surface the finding to the user via AskUserQuestion:
   • "Detected an in-chat digest by you covering {范围}. Use {范围 end + 1} as the start instead of history.json?"
   • Options: Yes, skip up to {end of detected range} / No, use history.json / No, cover everything in the requested range.
3. Apply the chosen anchor.

This is a heuristic — when uncertain (multiple matches, malformed title), default to history.json and tell the user what was skipped.

Generate the digest in three rounds so nothing slips through. The methodology stays here in SKILL.md; the content/style rules live in references/output-formats.md — read that file in Round 2 before drafting.

Round 1 — Build the skeleton

Read every message in order. Skip image fetching/decoding in this round. List every distinct discussion topic. Bias toward over-listing — trim in Round 3.

Internal working format (not written to the final file):

== 话题清单（共 N 条消息）==
1. [HH:MM-HH:MM] 话题名称（参与者：A, B, C）— 一句话概括（锚点 id：54052, 54055, 54063）
2. [HH:MM-HH:MM] 话题名称（参与者：D, E）— 一句话概括（锚点 id：54100-54112）
...

== 可能需要图片上下文的话题 ==
- 话题 3：锚点 id=49661（图片是讨论主体）

== 发言统计 ==
1. XXX — N 条  2. YYY — N 条  ...

Topic principles:

• Topic-switch signals: time gap > 30 min, participant change, content jump.
• 2+ participants OR substantive content qualifies as a topic; pure emoji-banter does not.
• Strict attribution: each topic must record "who said what". Don't fuse adjacent messages from different senders just because they're close in time — when minutes apart or interleaved with others, split into separate topics. Prefer two topics over one wrongly-merged topic.
• Carry anchor IDs: list the key message IDs for each topic. In Round 2, jump back to these IDs in the raw messages and verify content, don't guess from context. If quote_id / reply_to is present, use the ID chain — that's the most reliable attribution.

Flag-for-images criteria (any one triggers): an explicit comment on an image (看发型是X？, 这是谁？, 笑死), multiple people piling onto the same image without saying what it is, an image as the core information (晒单/截图/资料), an explanatory line right after an image (gpt-image-2, 太可怕了), or cross-sender ambiguity (B says "这个看着像 X" but the previous image is from A).

Round 2 — Flesh out + write the digest

For each topic in the skeleton, jump back to its anchor IDs and expand into full content with quotes and clear attribution. Then write the digest file.

Image handling (limited — wx-cli does not decode chat images):

For each flagged topic, check whether a description file already exists at {folder}/imgs/{message_id}.txt. If yes, read it (one-line plain text) and weave its content into the topic. If no, treat the image as opaque ([图片]) and write around it — describe what the surrounding messages tell us, but don't invent visual content.

The imgs/ directory exists as an extension point: a user (or a future wx-cli capability) can drop {message_id}.txt files with one-line descriptions, and the skill will pick them up. The skill itself does NOT generate these files in this version.

Use the profile context block (from Step 3.7):

• Echo continuity for matching behavior ("又双叒叕直播飞行体验")
• Highlight contrast for departures ("一向话少的 XX 今天突然爆发")
• Callback past quotes ("继上次'要不要买 moderna'之后，这次又...")
• Don't sacrifice current material to force a callback.

Roast pass — profile usage extras (only when generating the roast version):

• 历史槽点可做 callback joke
• Running gag 可以升级和迭代
• 历史毒舌语录可以引用或翻新
• 但当期素材优先，不要为了 callback 硬凑

Writing order: write the body categories first, then the opening overview based on the finished body (so the hook is accurate).

Detailed structure, voice, formatting rules, and content guidelines are in references/output-formats.md. Load that file now if not already loaded.

Round 3 — Audit

Walk the Round 1 skeleton against the finished digest. Check:

• Any listed topic missing from the digest?
• Quotes, names, product/tool names preserved verbatim?
• Categorization makes sense — is anything in the wrong bucket?

Fix in place. When clean, confirm and proceed.

Step 7: Save the digest file(s)

If include_normal:

• Single date → {folder}/YYYY-MM-DD.md
• Date range → {folder}/YYYY-MM-DD_YYYY-MM-DD.md
• Overwrite if the same date/range already exists.

If include_roast:

• Same naming, but with -roast suffix: YYYY-MM-DD-roast.md or YYYY-MM-DD_YYYY-MM-DD-roast.md.

Both versions share the same statistics (message count, leaderboard) and the same underlying skeleton.

Step 8: Save history (two files)

Maintain two files in the group folder:

history.json — single record, fast read

Always reflects only the most recent normal digest. Overwrite on each run when include_normal=true.

{
  "group_id": "12345678901@chatroom",
  "group_name": "相亲相爱一家人",
  "folder": "12345678901@chatroom-相亲相爱一家人",
  "last_digest": {
    "file": "2026-03-12.md",
    "date_range": "2026-03-12",
    "generated_at": "2026-03-12T10:30:00+08:00",
    "message_count": 150,
    "last_message_time": "03-12 18:45"
  }
}

• group_name updates on every run (handles renames).
• folder records the current folder basename for cross-reference.
• last_message_time is the timestamp of the most recent message included, in MM-DD HH:MM — used by incremental mode.
• Roast-only runs do NOT touch this file.

history-digests.jsonl — append-only archive

One JSON object per line, same shape as last_digest. Every normal-version run appends one line (in chronological order). Used by backfill and historical lookups. Never read for incremental mode (which only needs the latest).

{"file":"2026-03-10.md","date_range":"2026-03-10","generated_at":"2026-03-10T09:00:00+08:00","message_count":420,"last_message_time":"03-10 22:30"}
{"file":"2026-03-11.md","date_range":"2026-03-11","generated_at":"2026-03-11T09:05:00+08:00","message_count":312,"last_message_time":"03-11 23:10"}
{"file":"2026-03-12.md","date_range":"2026-03-12","generated_at":"2026-03-12T10:30:00+08:00","message_count":150,"last_message_time":"03-12 18:45"}

If a normal digest with the same file name is regenerated, append a new line anyway (the JSONL is a strict log; readers can dedupe by file if they need to).

Step 8.5: Update user profiles

For each user with 3+ messages in this batch who appeared in the 群友画像 section:

• If include_normal, update {folder}/profiles/{wxid}-{nickname}.md.
• If include_roast, update {folder}/profiles-roast/{wxid}-{nickname}.md.

Counts, frontmatter updates, append-only rules for quotes and events, and privacy guardrails are detailed in references/profiles.md. Load that file when running this step.

Completion checklist

Profile updates are easy to forget once the digest is on disk. Before reporting the run as "done", verify every applicable file:

• {folder}/YYYY-MM-DD.md written (if include_normal)
• {folder}/YYYY-MM-DD-roast.md written (if include_roast)
• {folder}/history.json overwritten with the new last_digest (if include_normal)
• {folder}/history-digests.jsonl appended one line (if include_normal)
• {folder}/profiles/{wxid}-*.md updated for every user with 3+ messages (if include_normal)
• {folder}/profiles-roast/{wxid}-*.md updated for every user with 3+ messages (if include_roast)

If any item is unchecked, finish it before declaring success. Don't ship a digest with a stale history.json — incremental mode depends on it.

Step 9: Backfill (user-triggered)

When the user says "回溯画像" / "初始化画像" / "backfill profiles":

1. Confirm the target group (if not specified, ask which one).
2. List all digest files in {folder}/ and history-digests.jsonl.
3. Read existing digests in batches of 10–15 to avoid context blowup.
4. For users appearing in 3+ digests, seed profile files using their leaderboard counts, portrait paragraphs, and quoted lines from the historical digests.
5. Write to profiles/ (and profiles-roast/ if any -roast.md files exist).
6. Report back: how many profiles were created, how many users covered.

Full procedure in references/profiles.md.

Storage layout

{data_root}/                                        # default: {project_root}/wechat/
└── {group_id}-{group_name}/                        # e.g. 12345678901@chatroom-相亲相爱一家人/
    ├── history.json                                # last digest pointer (fast)
    ├── history-digests.jsonl                       # append-only archive
    ├── 2026-03-12.md                               # normal digest, single date
    ├── 2026-03-12-roast.md                         # roast digest (only if generated)
    ├── 2026-03-10_2026-03-12.md                    # normal digest, date range
    ├── profiles/                                   # normal user profiles
    │   ├── onlytiancai-胡浩🐸.md
    │   └── ...
    ├── profiles-roast/                             # roast user profiles (only if any roast generated)
    │   ├── onlytiancai-胡浩🐸.md
    │   └── ...
    └── imgs/                                       # optional image-description files
        ├── 49661.txt                               # one-line plain text description
        └── ...

wx-cli quick reference

All wx commands accept --json for machine-readable output. Default output is YAML — only use it for human eyeballing during debugging.

Troubleshooting

When a wx command fails, diagnose by the symptom, not by retrying blindly. Common patterns:

Recovery order when nothing makes sense:

1. Is WeChat running?
2. Is ~/.wx-cli owned by $(whoami)?
3. Is the daemon healthy? (wx daemon status)
4. Restart the daemon (wx daemon stop && wx daemon start)
5. Last resort: wx init --force (while WeChat is running)

Never auto-retry inside the skill — every failure should produce a clear diagnostic plus the exact command the user needs to run.

Notes and limitations

• Image content is opaque. wx-cli does not decode chat images. The skill respects an imgs/{message_id}.txt extension point but does not auto-populate it. When a topic depends heavily on an image with no description file, the digest should say so honestly rather than invent visual content.
• Reply attribution is best-effort. If wx-cli's output exposes a quote/reply field, use it. Otherwise fall back to context and flag uncertain inferences in working notes.
• Local time only. Date parsing uses the agent's local time zone. Cross-time-zone group members may show timestamps that don't match their wall clock. Per the format rules, never use timestamps to infer sleep or location.
• wx-cli reinit. If wx history suddenly returns nothing after a WeChat restart, the keys may be stale. Tell the user to run sudo wx init --force (while WeChat is running) and retry.