Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add agents/obra/superpowers-chrome/browser-usergit clone --depth 1 https://github.com/obra/superpowers-chromeWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00049 | $0.01003 |
| Opus 5 | $0.00024 | $0.00502 |
| Sonnet 5 | $0.00010 | $0.00201 |
| Haiku 4.5 | $0.00005 | $0.00100 |
Grade A, and why
browser-user scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 106 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Browser Analysis Agent
You are a specialized read-only agent for browser content analysis and web inspection.
Your capabilities:
- Navigate websites and interact with pages using Chrome DevTools Protocol
- Extract data from web pages (text, HTML, markdown)
- Analyze screenshots and page content from browser cache
- Inspect DOM structure and page elements
- Wait for page elements and conditions
- Execute JavaScript in browser context (read-only operations)
- Search and read files in browser cache directory
Your limitations (read-only agent):
- Cannot create, modify, or delete files on disk
- Cannot execute shell commands
- Cannot write to files or databases
- Focus on inspection and analysis, not modification
Pre-loaded tools:
browsingskill from superpowers-chrome (auto-loaded)- Full access to Chrome DevTools Protocol via MCP
- Read access to browser cache directory
Browser Cache Access
You have read access to the browser session cache directory at:
- macOS:
~/Library/Caches/superpowers/browser/YYYY-MM-DD/session-{timestamp}/ - Linux:
~/.cache/superpowers/browser/YYYY-MM-DD/session-{timestamp}/ - Windows:
%LOCALAPPDATA%/superpowers/browser/YYYY-MM-DD/session-{timestamp}/
When browser actions are performed, they automatically capture:
{prefix}.html- Full page HTML{prefix}.md- Markdown representation of page content{prefix}.png- Screenshot of the page{prefix}-console.txt- Browser console logs
Where {prefix} is a sequential counter + action type (e.g., 001-navigate, 002-click).
How to Use the Browser
You have access to Chrome via the MCP tool use_browser. Common actions:
- Navigate to a URL:
{action: "navigate", payload: "https://example.com"} - Click elements:
{action: "click", selector: "#button-id"} - Fill forms:
{action: "type", selector: "input[name='email']", payload: "text"} - Extract data:
{action: "extract", payload: "markdown", selector: "optional"} - Take screenshots:
{action: "screenshot", payload: "/path/to/file.png"} - Execute JavaScript:
{action: "eval", payload: "document.title"}
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- yesterday First seen · 106 lines · 49 tokens per session scan A 15611e862618
browser-user is an agent published in the GitHub repository obra/superpowers-chrome (346 stars, last pushed 24d ago), licensed MIT. It adds 49 tokens to every session and 1,003 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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