Post To Fb

Post to Facebook (via ego-browser)

Drive the user's already-logged-in Facebook (林協霆 / profile https://www.facebook.com/htlin.lizard) to publish a text post. This skill encodes the exact flow so it runs in 2 heredoc rounds instead of trial-and-error.

Built on the ego-browser skill — all browser calls go through ego-browser nodejs <<'EOF' ... EOF. Read that skill's contract if unfamiliar.

Hard-won lessons (why this skill exists)

1. FB renders NO Markdown. Convert before posting: tables → 【標籤】左 / 右 lines, **bold** → drop or 「」, bullets → ・. Keep blank lines between paragraphs (they survive).
2. The editor is a rich contenteditable, not a textarea. fillInput/typeText are unreliable for multi-line. Use CDP Input.insertText after focusing — it preserves newlines in one shot.
3. Publish is TWO steps for the 訂閱者 (followers) audience. The primary button first reads 「繼續」 (not 發佈) → opens a 「貼文設定」 screen that loads a skeleton for ~2–3 s → then a 「發佈」 button. For other audiences the first button may already be 「發佈」. Handle both.
4. After 發佈 you briefly see a「發佈中」toast before the dialog closes. Don't assume failure while it's publishing.
5. Verify on the profile page, not the modal — reload the profile URL and check the body text contains the post's opening line.
6. Publishing is public + irreversible. Draft into the composer, screenshot, and confirm with the user before clicking publish — unless they explicitly said "post it / don't ask".

Inputs

• POST_TEXT — the final post body. If the user handed messy/Markdown content, first rewrite it to FB-plain-text per lesson #1.
• PROFILE_URL — default https://www.facebook.com/htlin.lizard (used only for verification).

Round 1 — open, compose, draft, screenshot

ego-browser nodejs <<'EOF'
const task = await useOrCreateTaskSpace('facebook post')
cliLog('task id: ' + task.id)

await openOrReuseTab('https://www.facebook.com/', { wait: true, timeout: 40 })
await waitForLoad(); await wait(2)

// Login guard: if not logged in, hand off instead of guessing.
const loggedIn = await js(String.raw`/在想些什麼|What's on your mind/.test(document.body.innerText||'')`)
if (!loggedIn) { cliLog('NOT LOGGED IN — hand off to user'); return }

// Open the composer dialog (button whose text contains 在想些什麼).
await click('xpath=//*[@role="button"][contains(normalize-space(.),"在想些什麼")]', { label: 'open composer' })
await wait(2)

const hasEditable = await js(String.raw`!!document.querySelector('[role="dialog"] [contenteditable="true"]')`)
cliLog('composer open: ' + hasEditable)

const POST_TEXT = `<<<PUT FB-PLAINTEXT POST BODY HERE>>>`

await js(String.raw`(() => {
  const ed = document.querySelector('[role="dialog"] [contenteditable="true"]'); ed.focus(); return true
})()`)
await wait(0.3)
await cdp('Input.insertText', { text: POST_TEXT })   // preserves newlines
await wait(1)

const preview = await js(String.raw`document.querySelector('[role="dialog"] [contenteditable="true"]').innerText.slice(0,200)`)
cliLog('draft starts: ' + preview)

const shot = await captureScreenshot()
cliLog('screenshot: ' + (shot?.path || JSON.stringify(shot)))
EOF

Then Read the screenshot, show the user the draft, and confirm (skip the ask only if they already said "just post it").

Round 2 — publish and verify

Handles both the one-step (直接「發佈」) and two-step (「繼續」→「貼文設定」→「發佈」) flows.

ego-browser nodejs <<'EOF'
const task = await useOrCreateTaskSpace('facebook post')  // resume by name, or pass the numeric id

const clickPrimary = async (labels) => {
  for (const t of labels) {
    const ok = await js(String.raw`(() => {
      const d = document.querySelector('[role="dialog"]'); if (!d) return false
      const b = [...d.querySelectorAll('[role="button"],button')].find(x => x.innerText.trim() === ${JSON.stringify(t)})
      return !!b
    })()`)
    if (ok) {
      await click('xpath=//div[@role="dialog"]//*[@role="button"][normalize-space(.)=' + JSON.stringify(t) + ']', { label: 'click ' + t })
      return t
    }
  }
  return null
}

// Step A: first primary button — may be 繼續 (→ settings) or 發佈 (direct).
const first = await clickPrimary(['發佈', '繼續'])
cliLog('clicked: ' + first)
await wait(3)

// Step B: if a 貼文設定 screen appeared, click 發佈 there.
const second = await clickPrimary(['發佈'])
if (second) cliLog('clicked publish on settings screen')
await wait(4)

// Verify on profile.
await gotoAndWait('https://www.facebook.com/htlin.lizard', { timeout: 40, settle: 3 })
await wait(3)
const firstLine = `<<<FIRST ~10 CHARS OF POST_TEXT>>>`
const ok = await js('document.body.innerText.includes(' + JSON.stringify(firstLine) + ')')
cliLog('post visible on profile: ' + ok)
EOF

If post visible is true, report success (mention the auto-generated link preview card if the post contained a URL). Then close in a dedicated final heredoc:

ego-browser nodejs <<'EOF'
const r = await completeTaskSpace('facebook post', { keep: false })
cliLog(JSON.stringify(r))
EOF

Notes & fallbacks

• Reusing the task space across rounds: prefer the numeric task.id printed in Round 1 to avoid name collisions.
• Composer button not found: snapshotText() and locate the 建立貼文 region; the entry button holds text 林協霆，在想些什麼？.
• insertText landed in the wrong field: re-focus [role="dialog"] [contenteditable="true"] specifically (the sidebar has other editables) and retry.
• Editing after publish: FB posts are editable in-place — the user can tweak wording without a repost.
• Images/links: a bare URL in the text auto-expands into a preview card; no upload step needed. For photos use the 相片／影片 button + uploadFile on the file input.