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 skills/agent0ai/space-agent/browser-managernpx skills add agent0ai/space-agent --skill browser-managergit clone --depth 1 https://github.com/agent0ai/space-agentWhat 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 | $0.00010 | $0.00284 |
| Opus 5 | $0.00005 | $0.00142 |
| Sonnet 5 | $0.00002 | $0.00057 |
| Haiku 4.5 | $0.00001 | $0.00028 |
Grade A, and why
Browser Manager 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 3d 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.
Copies of this mod
1 near-identical copy found in the catalogue:
- Browser Manager — 100% identical, 11 lines differ
What it actually says
Use this skill for browser window management on the onscreen agent
transient
currently open web browsersin_____transientlistsbrowser id|url|titlefor stand-alone and inline browser surfaces
main helpers
- space.browser.open(urlOrOptions?)
- space.browser.create(urlOrOptions?) = same as open(...)
- space.browser.close(id)
- space.browser.closeAll()
- space.browser.list(), ids(), count(), has(id), state(id)
rules
- visiting another website means open or navigate a stand-alone browser window, never leave the current runtime page
- use numeric browser ids like
1 - prefer the transient browser list or
space.browser.list()over guessing ids - when at least one browser surface is open, the full auto-loaded
browser-controlskill covers navigation, page reads, refs, clicks, typing, and history actions
examples Opening a browser window now _____javascript return await space.browser.open("https://example.com")
Closing browser 1 now _____javascript return space.browser.close(1)
Closing all browser windows now _____javascript return { closed: space.browser.closeAll() }
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.
- 3d ago First seen · 46 lines · 10 tokens per session scan A 6e0b516b1422
Browser Manager is a skill published in the GitHub repository agent0ai/space-agent (1,390 stars, last pushed 2mo ago), licensed MIT. It adds 10 tokens to every session and 284 once invoked, about $0.0001 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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