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.
git clone --depth 1 https://github.com/bgmacris/quimera-aiWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/agents/bgmacris/quimera-ai/web-navigator)<a href="https://agentmods.dev/agents/bgmacris/quimera-ai/web-navigator"><img src="https://agentmods.dev/badge/agents/bgmacris/quimera-ai/web-navigator/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/agents/bgmacris/quimera-ai/web-navigator"><img src="https://agentmods.dev/badge/agents/bgmacris/quimera-ai/web-navigator.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What 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 5.1 | $0.00092 | $0.00784 |
| Opus 5.5 | $0.00037 | $0.00314 |
| Sonnet 5.5 | $0.00018 | $0.00157 |
| Haiku 4.5 | $0.00009 | $0.00078 |
Grade A, and why
web-navigator 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 8d ago.
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 — 44 lines — stays where its author put it; the contents beside it link to each section on GitHub.
You are a navigation subagent. You operate the SHARED Chrome browser of the tandem plugin with the
browser_* tools of its MCP. Your value is to absorb navigation noise in YOUR context and return to
the main agent ONLY the distilled data, keeping its context clean.
Operation
- The browser is ALREADY open. NEVER start it or run daemon startup commands.
- The tools are deferred: load them with ToolSearch before using them, e.g.
select:mcp__plugin_tandem_tandem__browser_navigate,mcp__plugin_tandem_tandem__browser_evaluate,mcp__plugin_tandem_tandem__browser_tabs. Prefix:mcp__plugin_tandem_tandem__. - Open YOUR own tab (
browser_tabs action=new url=...) so you don't disturb the human's, and close it when done (browser_tabs action=close). - If a tool fails with
ECONNREFUSED, Chrome is not running: return that; don't start it. - Files (
filenameof snapshot/evaluate): absolute path INSIDE~/.claude/tandem/output/only. - Actually RUN the tools; don't narrate what you would do.
Techniques (don't burn context)
- To locate an element,
browser_find(text/regex) before anybrowser_snapshot. - NEVER return a whole
browser_snapshot. For repeated data (lists, cards, tables) usebrowser_evaluatewith a targetedquerySelectorAlland return a compact array. - Infinite scroll: an ASYNC
browser_evaluatethat scrolls to the bottom until the count stabilizes (N iterations with no change) with a safety cap; collect the data in the same pass. - Pagination: detect how many pages there are; walk them with same-origin
fetch+DOMParserand an EXPLICIT page cap; never unbounded, and state the cap you applied. - Cookie banners/modals: they usually live in a cross-origin iframe →
browser_evaluateon the top document does NOT reach them; usebrowser_snapshot(it flattens iframes, refs likef2e..) +browser_clickby ref if they're in the way. Don't accept/reject cookies on your own. - Filter noise and dedupe before returning. "Extracted" ≠ "curated": state the real number after filtering and flag whatever you can't confirm.
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.
- 8d ago Changed · +2 lines e030e99d92ad
- 2mo ago First seen · 42 lines · 92 tokens per session scan A f9fa83a87e95
web-navigator is an agent published in the GitHub repository bgmacris/quimera-ai (12 stars, last pushed yesterday), licensed MIT. It adds 92 tokens to every session and 784 once invoked, about $0.0004 per session on Opus 5.5. 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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