forked from Zakaria/hermes-agent
Hermes-agent
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@@ -0,0 +1,115 @@
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// Wrap the thread scroller's properties and observe pin/scroll/RO events
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// in real time during a submit, then print the timeline.
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const list = await (await fetch('http://127.0.0.1:9222/json/list')).json()
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const tgt = list.find(t => t.type === 'page' && t.url.startsWith('http'))
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const ws = new WebSocket(tgt.webSocketDebuggerUrl)
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let id = 0
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const pending = new Map()
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ws.addEventListener('message', ev => {
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const m = JSON.parse(ev.data)
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if (m.id != null && pending.has(m.id)) {
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pending.get(m.id)(m)
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pending.delete(m.id)
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}
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})
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await new Promise(r => ws.addEventListener('open', r))
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const send = (m, p = {}) =>
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new Promise(r => {
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const i = ++id
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pending.set(i, r)
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ws.send(JSON.stringify({ id: i, method: m, params: p }))
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})
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const evalP = async expr => {
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const r = await send('Runtime.evaluate', { expression: expr, returnByValue: true })
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if (r.result?.exceptionDetails) throw new Error(r.result.exceptionDetails.text)
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return r.result.result.value
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}
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await evalP(`(() => {
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const v = document.querySelector('[data-slot="aui_thread-viewport"]')
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if (v) v.scrollTop = v.scrollHeight
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})()`)
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await new Promise(r => setTimeout(r, 300))
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await evalP(`(() => {
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const el = document.querySelector('[data-slot="composer-rich-input"]')
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el.focus()
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const r = document.createRange(); r.selectNodeContents(el); r.collapse(false)
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window.getSelection().removeAllRanges(); window.getSelection().addRange(r)
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})()`)
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const text = 'short follow-up'
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for (const c of text) {
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await send('Input.dispatchKeyEvent', { type: 'char', text: c, unmodifiedText: c })
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await new Promise(r => setTimeout(r, 10))
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}
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await new Promise(r => setTimeout(r, 300))
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// Hook into the viewport scrollTop setter + scroll + RO so we see every event
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await evalP(`(() => {
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const v = document.querySelector('[data-slot="aui_thread-viewport"]')
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const events = []
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window.__threadEvents = events
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const t0 = performance.now()
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const push = (kind, detail) => events.push({ t: performance.now() - t0, kind, ...detail })
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// intercept scrollTop writes
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const desc = Object.getOwnPropertyDescriptor(Element.prototype, 'scrollTop')
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Object.defineProperty(v, 'scrollTop', {
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get() { return desc.get.call(this) },
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set(val) {
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push('scrollTop=', { val, fromScrollHeight: this.scrollHeight, stackTop: (new Error()).stack.split('\\n').slice(2, 5).map(s => s.trim()).join(' | ') })
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desc.set.call(this, val)
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},
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configurable: true
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})
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// scroll event
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v.addEventListener('scroll', () => {
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push('scroll', { scrollTop: v.scrollTop, scrollHeight: v.scrollHeight })
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}, { passive: true, capture: true })
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// RO on the viewport itself
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const ro = new ResizeObserver((entries) => {
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for (const e of entries) {
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push('RO', { target: e.target.getAttribute('data-slot') || e.target.tagName, h: e.contentRect.height })
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}
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})
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ro.observe(v)
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if (v.firstElementChild) ro.observe(v.firstElementChild)
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// mutationobserver on the viewport
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const mo = new MutationObserver((muts) => {
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push('mut', { count: muts.length, added: muts.reduce((s, m) => s + m.addedNodes.length, 0), removed: muts.reduce((s, m) => s + m.removedNodes.length, 0) })
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})
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mo.observe(v, { childList: true, subtree: true, characterData: true })
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window.__teardown = () => { ro.disconnect(); mo.disconnect() }
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return true
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})()`)
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// fire Enter
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await send('Input.dispatchKeyEvent', {
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type: 'rawKeyDown', windowsVirtualKeyCode: 13, key: 'Enter', code: 'Enter', text: '\r', unmodifiedText: '\r'
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})
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await send('Input.dispatchKeyEvent', { type: 'keyUp', windowsVirtualKeyCode: 13, key: 'Enter', code: 'Enter' })
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await new Promise(r => setTimeout(r, 1200))
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const events = JSON.parse(await evalP(`JSON.stringify(window.__threadEvents || [])`))
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console.log(`\n${events.length} events:`)
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for (const e of events) {
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const t = String(e.t.toFixed(0)).padStart(5)
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const { kind, t: _t, ...rest } = e
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console.log(` ${t}ms ${kind.padEnd(12)} ${JSON.stringify(rest)}`)
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}
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await evalP(`window.__teardown?.()`)
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// Cancel running agent
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await evalP(`(() => {
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for (const b of document.querySelectorAll('button')) {
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if ((b.getAttribute('aria-label') || '').toLowerCase().includes('stop')) { b.click(); return 'stopped' }
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}
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})()`)
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ws.close()
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