---
name: web-access
description: >-
  Use this skill whenever the user needs to access information from the internet
  — searching for current information, fetching public web pages, browsing
  login-gated sites (微博/小红书/B站/飞书/Twitter), comparing products,
  researching topics, gathering documentation, or summarizing news.
  This skill orchestrates three complementary layers: (1) WebSearch + WebFetch
  for public pages, (2) Jina Reader as the default token-optimization layer for
  heavy/JS-rendered pages, and (3) Chrome DevTools Protocol (CDP) via Python
  Playwright for login-gated sites that require the user's existing browser
  session. Always cite source URLs. Use when 用户提到 联网搜索、上网查、
  查资料、抓取网页、研究、调研、最新资讯、文档查询、对比、竞品、技术文档、
  新闻、网址、URL、找一下、搜一下、查一下、小红书、B站、微博、飞书、Twitter、
  推特、X、知乎、公众号、已登录、登录状态。
license: Complete terms in LICENSE.txt
version: 2.0.1
type: procedural
risk_level: low
status: enabled
disable-model-invocation: true
tags:
  - web
  - search
  - fetch
  - research
  - browsing
  - cdp
  - playwright
provides:
  tools:
    - BrowserListTabs
    - BrowserNavigate
    - BrowserEval
    - BrowserClick
    - BrowserScreenshot
    - BrowserScroll
    - BrowserSetFiles
    - BrowserCloseTab
    - SitePatternRead
    - SitePatternWrite
    - LocalBookmarks
metadata:
  author: desirecore
  updated_at: '2026-05-05'
  i18n:
    default_locale: en-US
    source_locale: zh-CN
    locales:
      - zh-CN
      - en-US
    zh-CN:
      name: 联网访问
      short_desc: 联网搜索、网页抓取、登录态浏览器访问（CDP）、研究调研工作流
      description: 三层联网访问工具包——搜索公开页面、Jina 优化抓取、CDP 登录态浏览器访问。
      body: ./SKILL.zh-CN.md
      source_hash: sha256:0ba170b3126a0823
      translated_by: human
    en-US:
      name: Web Access
      short_desc: Web search, page fetching, logged-in browser access via CDP, research workflows
      description: A three-layer web-access toolkit — search public pages, fetch heavy pages via Jina Reader, and reach logged-in sites via Chrome CDP.
      body: ./SKILL.md
      source_hash: sha256:1d044824f5ab31bc
      translated_by: human
market:
  icon: >-
    <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0
    24 24" fill="none"><defs><linearGradient id="wa-a" x1="2" y1="2" x2="20"
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    offset="1" stop-color="#34C759"/></linearGradient></defs><circle cx="10"
    cy="10" r="8" fill="url(#wa-a)" fill-opacity="0.1" stroke="url(#wa-a)"
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    stroke="url(#wa-a)" stroke-width="1"
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    stroke="#34C759" stroke-width="1.5" fill="#34C759"
    fill-opacity="0.12"/><path d="M20.5 20.5l2 2" stroke="#34C759"
    stroke-width="1.8" stroke-linecap="round"/></svg>
  category: research
  maintainer:
    name: DesireCore Official
    verified: true
  channel: latest
---

# web-access skill

## L0: One-line Summary

A three-layer web-access toolkit — search public pages, optimize fetches via Jina Reader, and reach login-gated sites via Chrome CDP.

## L1: Overview & Use Cases

### Capability

web-access is a **procedural skill** that provides four complementary layers of web access:

- **L1** (WebSearch + WebFetch): public, static pages
- **L2** (Jina Reader): JS-rendered heavy pages, saving tokens by default
- **L3-fast** (BrowserXxx builtin tool family — **new in v2.0**): preferred for logged-in sites — zero Python dependency, in-process cdp-proxy, supports CDP real-mouse events
- **L3-fallback** (Chrome CDP + Python Playwright): backup for complex automation (long waits, race conditions, custom in-browser scripts)

### v2.0 — BrowserXxx tool family (default-hidden, exposed only after Skill activation)

When you call `Skill('web-access')`, the following 11 tools are injected into the current session so the LLM can drive Chrome directly:

| Tool | Purpose |
|------|---------|
| BrowserListTabs / BrowserNavigate / BrowserCloseTab | Tab management |
| BrowserEval | Run JS to extract data |
| BrowserClick (`mode: js \| real-mouse`) | Click elements; real-mouse defeats anti-bot |
| BrowserScreenshot / BrowserScroll | Screenshots, scroll to trigger lazy loading |
| BrowserSetFiles | Upload local files (requires user confirmation) |
| SitePatternRead / SitePatternWrite | Per-domain "site experience" (AgentFS three-layer) |
| LocalBookmarks | Search local Chrome bookmarks / history |

> **Important**: before `Skill('web-access')` is called, none of these tools appear in the LLM tools list — default conversations don't pay their token cost. See [references/browser-tools.md](references/browser-tools.md).

### Use Cases

- The user needs to search for current information or research a specific topic
- The user needs to fetch public web content or technical documentation
- The user needs to access logged-in sites (Xiaohongshu, Bilibili, Weibo, Feishu, Twitter, etc.)
- The user needs to compare products, aggregate news, or investigate API/library versions

### Core Value

- **Four-layer progression**: from lightweight search to heavy JS rendering to logged-in access — pick on demand
- **Token optimization**: Jina Reader cuts token usage by 50–80% by default
- **Logged-in session reuse**: connect to the user's already-logged-in Chrome via CDP — no re-login required

## L2: Detailed Specification

## Output Rule

When you complete a research task, you **MUST** cite all source URLs in your response. Distinguish between:
- **Quoted facts**: directly from a fetched page → cite the URL
- **Inferences**: your synthesis or analysis → mark as "(analysis/inference)"

If any fetch fails, explicitly tell the user which URL failed and which fallback you used.

---

## Prerequisites: Chrome CDP Setup (for login-gated sites)

**Only required when accessing sites that need the user's login session** (Xiaohongshu / Bilibili / Weibo / Feishu / Twitter / Zhihu / WeChat Official Accounts).

### One-time setup

Launch a dedicated Chrome instance with remote debugging enabled:

**macOS**:
```bash
/Applications/Google\ Chrome.app/Contents/MacOS/Google\ Chrome \
  --remote-debugging-port=9222 \
  --user-data-dir="${DESIRECORE_ROOT}/chrome-profile"
```

**Linux**:
```bash
google-chrome \
  --remote-debugging-port=9222 \
  --user-data-dir="${DESIRECORE_ROOT}/chrome-profile"
```

**Windows (PowerShell)**:
```powershell
& "C:\Program Files\Google\Chrome\Application\chrome.exe" `
  --remote-debugging-port=9222 `
  --user-data-dir="$env:USERPROFILE\.desirecore\chrome-profile"
```

After launch:
1. Manually log in to the sites you need (Xiaohongshu, Bilibili, Weibo, Feishu, …)
2. Leave this Chrome window open in the background
3. Verify the debug endpoint: `curl -s http://localhost:9222/json/version` should return JSON

### Verify CDP is ready

Before any CDP operation, always run:
```bash
curl -s http://localhost:9222/json/version | python3 -c "import sys,json; d=json.load(sys.stdin); print('CDP ready:', d.get('Browser'))"
```

If the command fails, tell the user: "Please launch Chrome with the remote debugging port enabled (see the Prerequisites section of the web-access skill)."

---

## Tool Selection Decision Tree

```
User intent
  │
  ├─ "Search for information about X" (no specific URL)
  │     └─→ WebSearch → pick top 3-5 results → fetch each (see next branches)
  │
  ├─ "Read this public page" (static HTML, docs, news)
  │     └─→ WebFetch(url) directly
  │
  ├─ "Read this heavy-JS page" (SPA, React/Vue sites, Medium, etc.)
  │     └─→ Bash: curl -sL "https://r.jina.ai/<original-url>"
  │          (Jina Reader = default for JS-rendered content, saves tokens)
  │
  ├─ "Read this login-gated page" (Xiaohongshu/Bilibili/Weibo/Feishu/Twitter/Zhihu/WeChat)
  │     └─→ 1. Verify CDP ready (curl http://localhost:9222/json/version)
  │          2. Bash: python3 script with playwright.connect_over_cdp()
  │          3. Extract content → feed to Jina Reader for clean Markdown
  │             (or use BeautifulSoup directly on the raw HTML)
  │
  ├─ "API documentation / GitHub / npm package info"
  │     └─→ Prefer official API endpoints over scraping HTML:
  │          - GitHub: gh api repos/owner/name
  │          - npm:    curl https://registry.npmjs.org/<pkg>
  │          - PyPI:   curl https://pypi.org/pypi/<pkg>/json
  │
  └─ "Real-time interactive task" (click, fill form, scroll, screenshot)
        ├─→ **Default: BrowserXxx tools** (BrowserNavigate / BrowserEval / BrowserClick / BrowserScreenshot —
        │     see references/browser-tools.md, no Python needed)
        └─→ Fallback: CDP + Python Playwright (references/cdp-browser.md) when BrowserXxx is insufficient
            (e.g., complex race conditions, multi-event waits, long-running in-browser scripts)
```

### Four-layer strategy summary

| Layer | Use case | Primary tool | Token cost |
|-------|----------|--------------|------------|
| L1 | Public, static | `WebFetch` | Low |
| L2 | JS-heavy, long articles, token savings | `Bash curl r.jina.ai` | **Lowest** (Markdown pre-cleaned) |
| **L3-fast** | **Login-gated, interactive (PRIMARY)** | **BrowserXxx tool family** | Medium |
| L3-fallback | Complex automation (race / long-wait / custom scripts) | `Bash + Python Playwright CDP` | Medium |

**Default priority**: L1 for simple public pages → L2 for heavy → **L3-fast for login-gated** → L3-fallback only when BrowserXxx is insufficient.

---

## Supported Sites Matrix

| Site | Recommended Layer | Notes |
|------|-------------------|-------|
| Wikipedia, MDN, official docs | L1 WebFetch | Static, clean HTML |
| GitHub README, issues, PRs | `gh api` (best) → L1 WebFetch | Prefer API |
| Hacker News, Reddit | L1 WebFetch | Public content |
| Medium, Dev.to | L2 Jina Reader | JS-rendered, member gates |
| Twitter/X | L3 CDP (or L2 Jina with `x.com`) | Login required for full thread |
| Xiaohongshu (xiaohongshu.com) | L3 CDP | Login required |
| Bilibili (bilibili.com) | L3 CDP | Login needed for video desc/comments |
| Weibo (weibo.com) | L3 CDP | Long posts require login |
| Zhihu (zhihu.com) | L3 CDP | Long articles + comments require login |
| Feishu Docs (feishu.cn) | L3 CDP | Login required |
| WeChat Official Accounts (mp.weixin.qq.com) | L2 Jina Reader | Usually public, Jina cleans better |
| LinkedIn | L3 CDP | Login wall |

---

## Tool Reference

### Layer 1: WebSearch + WebFetch

**WebSearch** — discover URLs for an unknown topic:
```
WebSearch(query="latest typescript 5.5 features 2026", max_results=5)
```

Tips:
- Include the year for time-sensitive topics
- Use `allowed_domains` / `blocked_domains` to constrain

**WebFetch** — extract clean Markdown from a known URL:
```
WebFetch(url="https://example.com/article")
```

Tips:
- Results cached for 15 min
- Returns cleaned Markdown with title + URL + body
- If body < 200 chars or looks garbled → escalate to Layer 2 (Jina) or Layer 3 (CDP)

### Layer 2: Jina Reader (default for heavy pages)

Jina Reader (`r.jina.ai`) is a free public proxy that renders pages server-side and returns clean Markdown. Use it as the **default** for any page where WebFetch produces garbled or truncated output, and as the **preferred** extractor for JS-heavy SPAs.

```bash
curl -sL "https://r.jina.ai/https://example.com/article"
```

Why Jina is the default token-saver:
- Strips nav/footer/ads automatically
- Handles JS-rendered SPAs
- Returns 50-80% fewer tokens than raw HTML
- No API key needed for basic use (~20 req/min)

See [references/jina-reader.md](references/jina-reader.md) for advanced endpoints and rate limits.

### Layer 3: CDP Browser (login-gated access)

Use Python Playwright's `connect_over_cdp()` to attach to the user's running Chrome (which already has login cookies). **No re-login needed.**

**Minimal template**:
```bash
python3 << 'PY'
from playwright.sync_api import sync_playwright

TARGET_URL = "https://www.xiaohongshu.com/explore/..."

with sync_playwright() as p:
    browser = p.chromium.connect_over_cdp("http://localhost:9222")
    context = browser.contexts[0]  # reuse user's default context (has cookies)
    page = context.new_page()
    page.goto(TARGET_URL, wait_until="domcontentloaded")
    page.wait_for_timeout(2000)  # let lazy content load
    html = page.content()
    page.close()

# Print first 500 chars to verify
print(html[:500])
PY
```

**Extract text via BeautifulSoup** (no Jina round-trip):
```bash
python3 << 'PY'
from playwright.sync_api import sync_playwright
from bs4 import BeautifulSoup

with sync_playwright() as p:
    browser = p.chromium.connect_over_cdp("http://localhost:9222")
    page = browser.contexts[0].new_page()
    page.goto("https://www.bilibili.com/video/BV...", wait_until="networkidle")
    html = page.content()
    page.close()

soup = BeautifulSoup(html, "html.parser")
title = soup.select_one("h1.video-title")
desc = soup.select_one(".video-desc")
print("Title:", title.get_text(strip=True) if title else "N/A")
print("Desc:",  desc.get_text(strip=True)  if desc  else "N/A")
PY
```

See [references/cdp-browser.md](references/cdp-browser.md) for:
- Per-site selectors (Xiaohongshu / Bilibili / Weibo / Zhihu / Feishu)
- Scrolling & lazy-load patterns
- Screenshot & form-fill recipes
- Troubleshooting connection issues

---

## L3-fast: BrowserXxx Tool Cheatsheet (v2.0 recommended)

**Only after you call `Skill('web-access')` will the following tools appear in `tools[]`.**

| Tool | One-line example |
|------|-----------------|
| `BrowserListTabs()` | List all open tabs |
| `BrowserNavigate({ url })` | Open URL in a new tab |
| `BrowserNavigate({ target, url })` | Navigate an existing tab |
| `BrowserEval({ target, expression })` | Run JS in the tab to extract structured data |
| `BrowserClick({ target, selector, mode: 'real-mouse' })` | Real-mouse mode for anti-bot-strict sites |
| `BrowserScreenshot({ target })` | Saved under ${DESIRECORE_ROOT}/screenshots/ |
| `BrowserScroll({ target, direction: 'bottom' })` | Trigger lazy loading |
| `BrowserSetFiles({ target, selector, files })` | Upload local files (**user confirmation required**) |
| `BrowserCloseTab({ target })` | Clean up temporary tabs at task end |

Full API and edge cases: see [references/browser-tools.md](references/browser-tools.md).

### Recommended flow (Xiaohongshu example)

```
1. BrowserListTabs() → check whether there's an already-logged-in xhs tab
2. If not → BrowserNavigate({ url: "https://www.xiaohongshu.com/explore/abc123" })
3. BrowserEval({ target, expression: "...JSON.stringify({title, content})" })
4. SitePatternRead({ domain: "xiaohongshu.com" })  ← read accumulated experience
5. At task end → BrowserCloseTab({ target })
6. If you find a new pitfall → SitePatternWrite({ domain, scope: "agent", mode: "merge", content })
```

---

## Site Experience Accumulation (v2.0)

When the task ends and you've discovered new anti-bot pitfalls, effective selectors, or platform quirks, call:

```
SitePatternWrite({
  domain: "xiaohongshu.com",
  scope: "agent",     // agent=shared (Git-tracked, can be published); user=private
  mode: "merge",      // merge appends; replace overwrites
  content: "## Known pitfalls\n- 2026-05: ...",
  confidence: "medium"
})
```

Reads use a three-layer priority order:

```
SitePatternRead({ domain: "xiaohongshu.com" })
  → users/<userId>/agents/<agentId>/memory/site-patterns/   (user-private)
  → agents/<agentId>/memory/site-patterns/                  (agent-shared, Git)
  → defaults/global-skills/web-access/references/site-patterns/  (global baseline, read-only)
```

Content containing cookies / tokens / phone numbers / emails will **automatically downgrade scope='user'** and notify you.

---

## Common Workflows

Read [references/workflows.md](references/workflows.md) for detailed templates:
- Tech docs lookup
- Competitor research
- News aggregation & timelines
- API/library version investigation

Read [references/cdp-browser.md](references/cdp-browser.md) for login-gated site recipes (Xiaohongshu / Bilibili / Weibo / Zhihu / Feishu).

Read [references/jina-reader.md](references/jina-reader.md) for Jina Reader positioning, rate limits, and advanced endpoints.

---

## Quick Workflow: Multi-Source Research

```
1. WebSearch(query) → 5 candidate URLs
2. Skim titles + snippets → pick 3 most relevant
3. Classify each URL by layer (L1 / L2 / L3)
4. Fetch all in parallel (single message, multiple tool calls)
5. If any fetch returns < 200 chars or garbled → retry via next layer
6. Synthesize: contradictions? consensus? outliers?
7. Report with inline [source](url) citations + a Sources list at the end
```

---

## Anti-Patterns (Avoid)

- ❌ **Using WebFetch on obviously heavy sites** — Medium, Twitter, Xiaohongshu will waste tokens or fail. Jump straight to L2/L3.
- ❌ **Launching headless Chrome instead of CDP attach** — loses user's login state, triggers anti-bot, slow cold start. Always use `connect_over_cdp()` to attach to the user's existing session.
- ❌ **Fetching one URL at a time when you need 5** — batch in a single message.
- ❌ **Trusting a single source** — cross-check ≥ 2 sources for non-trivial claims.
- ❌ **Fetching the search result page itself** — WebSearch already returns snippets; fetch the actual articles.
- ❌ **Ignoring the cache** — WebFetch caches 15 min, reuse freely.
- ❌ **Scraping when an API exists** — GitHub, npm, PyPI, Wikipedia all have JSON APIs.
- ❌ **Forgetting the year in time-sensitive queries** — "best AI models" returns 2023 results; "best AI models 2026" returns current.
- ❌ **Hardcoding login credentials in scripts** — always rely on the user's pre-logged CDP session.
- ❌ **Citing only after the fact** — collect URLs as you fetch, not from memory afterwards.
- ❌ **(v2.0) Writing Python heredoc when BrowserXxx would do** — slow, requires Python+Playwright install, and bloats context. Prefer L3-fast; fall back to Python only when BrowserXxx is insufficient (race / long-wait / custom scripts).
- ❌ **(v2.0) Discovering new pitfalls and not writing a site-pattern** — next time the same Agent runs the task, it'll repeat the same mistakes. Anything that took 2+ steps to figure out is worth `SitePatternWrite(scope='agent', mode='merge')`.
- ❌ **(v2.0) Writing cookies / phone numbers to scope='agent'** — that layer is Git-tracked and may be published to the marketplace. SitePatternWrite auto-downgrades, but don't deliberately write secrets to the agent layer.

---

## Example Interaction

**User**: "Grab the contents of this Xiaohongshu note for me: https://www.xiaohongshu.com/explore/abc123"

**Agent workflow**:
```
1. Recognize → Xiaohongshu is an L3 logged-in site
2. Check CDP: curl -s http://localhost:9222/json/version
   ├─ Failure → prompt the user to launch Chrome in debug mode, abort
   └─ Success → continue
3. Bash: python3 connect_over_cdp script → page.goto(url) → page.content()
4. BeautifulSoup extract h1 title, .note-content, .comments
5. When returning to the user:
   - Cite the original URL
   - If content is long, run it through Jina to save tokens
6. Tell the user: "Fetched via your logged-in session, original link: [xhs](url)"
```

---

## Installation Note

CDP features require Python + Playwright installed:

```bash
pip3 install playwright beautifulsoup4
python3 -m playwright install chromium  # only needed if user hasn't installed Chrome
```

If `playwright` is not installed when the user requests a login-gated site, run the install commands in Bash and explain you're setting up the browser automation dependency.
