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 skills add band-app/band --skill band-browsergit clone --depth 1 https://github.com/band-app/bandWrote 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/skills/band-app/band/band-browser)<a href="https://agentmods.dev/skills/band-app/band/band-browser"><img src="https://agentmods.dev/badge/skills/band-app/band/band-browser/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/skills/band-app/band/band-browser"><img src="https://agentmods.dev/badge/skills/band-app/band/band-browser.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 | $0.00060 | $0.01017 |
| Opus 5 | $0.00030 | $0.00508 |
| Sonnet 5 | $0.00012 | $0.00203 |
| Haiku 4.5 | $0.00006 | $0.00102 |
Grade A, and why
band-browser 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 — 119 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Band Browser Tabs
Browser tabs are web views attached to a Band workspace. Each tab has its own URL and status, and can be driven from the CLI.
This skill is focused on browser tab management only. For broader operations see the sibling skills:
band— workspaces, projects, cronjobs, tunnel, settings.band-chat— agent chat panes inside a workspace.band-terminal— terminal sessions inside a workspace.
Prerequisites
The Band server must be running (started by the Band dashboard app). Connects to http://localhost:3456 by default. See the band skill for general setup and the workspace lifecycle.
JSON Output
All commands support --output json (or BAND_OUTPUT=json env var) for structured output.
- Success: JSON object to stdout, exit code 0
- Error:
{"error": "message"}to stderr, exit code 1
Commands
List browser tabs for a workspace
band browsers list [workspace_id]
Text output: ID\tNAME\tURL\tSTATUS (tab-separated table).
JSON output: {"browsers": [{"id": "...", "name": "...", "url": "...", "status": "..."}]}
Create a new browser tab in a workspace
band browsers create [workspace_id] [--url <string>] [--name <string>]
Text output: the new browser tab ID.
JSON output: {"browser": {"id": "...", ...}}
Navigate a browser tab to a URL
band browsers navigate [browser_id] --url <string>
Updates the browser tab's URL in the server state. When browser_id is omitted, auto-detects the workspace from cwd and targets that workspace's first browser tab. Mirrors the shape of chats send [chat_id] --message ... and terminals send [terminal_id] --data ... — panel ID is positional, data is a flag.
Get a browser tab's current state
band browsers get [browser_id]
Text output: formatted key-value pairs.
JSON output: {"browser": {"id": "...", "name": "...", "url": "...", "status": "..."}}
Remove a browser tab
band browsers remove [browser_id]
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 First seen · 119 lines · 60 tokens per session scan A c8cedb2661b4
band-browser is a skill published in the GitHub repository band-app/band (5 stars, last pushed yesterday), licensed MIT. It adds 60 tokens to every session and 1,017 once invoked, about $0.0003 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 2026-08-31.
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