Douyin: Send a DM via Chrome

Send a text DM to a Douyin user from the user's signed-in Chrome session, then verify the message actually delivered (Douyin will silently render bubbles even when DMs are banned — never claim success without checking).

When to use

Trigger on any of:

• "send a message to \x3Cname> on Douyin / 抖音"
• "DM \x3Cname> on douyin.com"
• "tell \x3Cname> '\x3Ctext>' on Douyin"
• 抖音 / 私信 / 发私信 mentioned alongside a target user

If the user wants to control the desktop app (抖音聊天.app / Douyin Chat for Mac) rather than the website, this skill does not apply — that requires macOS Accessibility automation, not browser control.

Prerequisites (one-time setup)

1. Chrome 144+ exposing CDP on 127.0.0.1:9222. The user can launch Chrome with --remote-debugging-port=9222, or open chrome://inspect/#remote-debugging, click Configure…, and follow the in-page steps until they see Server running at: 127.0.0.1:9222.
2. OpenClaw user browser profile (built-in: driver=existing-session, transport=chrome-mcp). No extra config needed — browser action=start profile=user will spawn chrome-devtools-mcp and attach.
3. User logged into douyin.com in that Chrome.
4. Sender and recipient must be mutual followers (相互关注). Douyin web blocks DMs to non-mutuals. If the target's profile shows only "关注" (follow) instead of "相互关注", stop and tell the user.
5. Sender's DM privilege not banned. If banned, the message bubble still renders locally with a tip "私信功能已被封禁" — see Verify step.

Workflow

1. Attach to Chrome

browser action=start profile=user
browser action=tabs profile=user

Pick an empty tab from tabs, or be prepared to open a new one. Save its targetId — pass it on every subsequent call to keep the same tab.

2. Find the target user

Navigate the chosen tab to a user search:

browser action=navigate profile=user targetId=\x3Cid>
  url=https://www.douyin.com/search/\x3CURL-encoded query>?type=user

Snapshot with refs="aria" and pick the result whose card shows "相互关注" and whose 抖音号 / bio matches what the user described. If multiple plausible results exist, ask the user to confirm before proceeding.

Click that result link by ref — it opens the profile in a new tab. Snapshot or browser action=tabs again to find the new targetId (URL pattern: https://www.douyin.com/user/MS4wLj…). Switch to that tab for the rest of the flow.

3. Open the DM panel from the profile

Critical: there are two 私信 controls on the page.

• Header 私信 (top-right, around x≈1542) opens the global DM panel with no conversation selected.
• Profile-page 私信 button (next to "相互关注", around x≈1562 y≈158) opens the panel with the right conversation already selected.

Always click the profile-page button. Find it via DOM filter, not by ref (the ref tree sometimes returns the wrong element):

browser action=act profile=user targetId=\x3Cprofile-tab>
  request={"kind":"evaluate","fn":"() => { const btns=[...document.querySelectorAll('button')].filter(b=>(b.innerText||'').trim()==='私信' && b.offsetParent!==null); for (const b of btns){ const r=b.getBoundingClientRect(); if (r.width>30 && r.width\x3C200 && r.height>20 && r.height\x3C60 && r.x>200){ b.click(); return JSON.stringify({clicked:true,x:Math.round(r.x),y:Math.round(r.y)}); } } return JSON.stringify({found:btns.length}); }"}

Then wait for the panel to render:

browser action=act profile=user targetId=\x3Cid>
  request={"kind":"wait","timeMs":1500}

Verify the right conversation is selected by reading .RightPanelHeadertitle:

browser action=act profile=user targetId=\x3Cid>
  request={"kind":"evaluate","fn":"() => { const h=document.querySelector('.RightPanelHeadertitle'); return h?h.innerText:null; }"}

The result must equal the target user's display name. If null or wrong, the DM panel didn't open or the wrong row got selected — retry the click.

4. Type the message

The message editor is a [contenteditable="true"] with placeholder 发送消息. Standard act:type rejects pure-coords focus on existing-session driver, so write the text via execCommand:

browser action=act profile=user targetId=\x3Cid>
  request={"kind":"evaluate","fn":"() => { const ed=[...document.querySelectorAll('[contenteditable=\"true\"]')].find(e=>{const r=e.getBoundingClientRect();return r.width>100 && r.height>20;}); if(!ed) return 'no-editor'; ed.focus(); const sel=window.getSelection(); const range=document.createRange(); range.selectNodeContents(ed); range.collapse(false); sel.removeAllRanges(); sel.addRange(range); document.execCommand('insertText',false,'\x3CMESSAGE TEXT>'); return ed.innerText; }"}

Replace \x3CMESSAGE TEXT> with the user's message. Escape single quotes (' → \\'). The returned innerText should match the message (a trailing zero-width char is fine).

5. Send

browser action=act profile=user targetId=\x3Cid>
  request={"kind":"press","key":"Enter"}

6. Verify delivery — do not skip

Inspect the DOM for both signals:

browser action=act profile=user targetId=\x3Cid>
  request={"kind":"evaluate","fn":"() => { const ed=[...document.querySelectorAll('[contenteditable=\"true\"]')].find(e=>{const r=e.getBoundingClientRect();return r.width>100 && r.height>20;}); const editorText=ed?ed.innerText.trim():null; const list=document.querySelector('.messageMessageListwrapper'); const listText=list?list.innerText.slice(0,400):''; const banned=/私信功能已被封禁|对方拒收|不是Ta的好友|无法发送/.test(listText); return JSON.stringify({editorEmpty:!editorText||editorText==='\u200b'||editorText==='', listText, banned}); }"}

Outcome matrix:

Always quote the exact tip text Douyin shows when reporting a ban — don't paraphrase.

Failure modes & recovery

• Search returns multiple "相互关注" matches. Ask the user to disambiguate by 抖音号 or bio before clicking.
• No 私信 button on profile, only "关注" / "相互关注". Not mutuals. Tell the user — Douyin web doesn't allow DMs to non-mutuals.
• browser action=screenshot fails with ENOENT … openclaw-chrome-mcp-…. Known existing-session driver quirk. Skip screenshots; rely on DOM inspection (evaluate) for verification.
• Header 私信 click instead of profile button. Closes / reopens the global panel without selecting a chat. Always re-check .RightPanelHeadertitle matches the target.
• Massive evaluate blocks accidentally clicking page-wide containers. Constrain queries with getBoundingClientRect size filters (e.g. width\x3C400 && height\x3C100).
• act:type errors with "type requires ref or selector". Existing-session driver doesn't accept coords-only focus. Use the execCommand('insertText', …) evaluate pattern in step 4.
• Chrome MCP attach times out (Chrome MCP existing-session attach … timed out). Verify curl -s http://127.0.0.1:9222/json/version returns JSON. If 404, Chrome's chrome://inspect proxy is on but the actual DevTools endpoint isn't — relaunch Chrome with --remote-debugging-port=9222.

Reuse on another machine

Copy this SKILL.md (and parent directory) to that machine's skills root (e.g. ~/.openclaw/workspace/skills/douyin-send-dm/ or ~/.agents/skills/douyin-send-dm/). Then just say "send a Douyin DM to \x3Cuser>: \x3Ctext>" — OpenClaw's skill discovery will load it.

If the target user is not the same person as on this machine, redo step 2 (search + confirm 相互关注) before sending.

Honest reporting rules

• Never say "message sent" based only on the bubble appearing. Always run the verify step.
• If banned/blocked, surface Douyin's exact tip in your reply and recommend the user check their Douyin notifications.
• If the user asks "did it actually send?", re-run the verify-step query and report the live DOM state.