A command-line browser automation tool for navigating websites and interacting with their pages. It can fill forms, click controls, take screenshots, extract structured data, run checks, and show a live browser view.

Use it to automate web workflows, test web applications, gather data, submit forms, capture screenshots, and verify page conditions.

It removes the need to perform repetitive website actions manually and helps agents work with changing pages safely by refreshing page references.

gsd-browser — Skill for Claude Code by skillmds/skillmd

Install

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.

Any agent

npx skills add skillmds/skillmd --skill gsd-browser

Clone the repo

git clone --depth 1 https://github.com/skillmds/skillmd

Made for: Claude Code.

Or install agents-mcp, the plugin that ships this one along with the rest of its 34 skills.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/skillmds/skillmd/gsd-browser/github.svg)](https://agentmods.dev/skills/skillmds/skillmd/gsd-browser)

Your own site

<a href="https://agentmods.dev/skills/skillmds/skillmd/gsd-browser"><img src="https://agentmods.dev/badge/skills/skillmds/skillmd/gsd-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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/skillmds/skillmd/gsd-browser"><img src="https://agentmods.dev/badge/skills/skillmds/skillmd/gsd-browser.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 157 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 6,933 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin 100% copy Near-identical to another mod in the catalogue.

Token cost

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	$0.00157	$0.06933
Opus 5.5	$0.00063	$0.02773
Sonnet 5	$0.00031	$0.01387
Haiku 4.5	$0.00016	$0.00693

Measured 4d ago against content hash 1c2ddf15262c, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-23, from the pricing page.

Security

Grade A, and why

gsd-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 4d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (install.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

Origin

This is a copy

100% identical to gsd-browser — 1 line differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

plugins/agents-mcp/skills/gsd-browser/SKILL.md · 785 lines

How it starts

The opening of the file, as written. The whole thing — 785 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Browser Automation with gsd-browser

Critical Rules

The daemon auto-starts on browser commands. daemon health only reports state; it does not start a session. Use daemon start only when you want to pre-warm or verify daemon lifecycle explicitly.
Always re-snapshot after page changes. Refs are versioned (@v1:e1). After navigation, form submission, or dynamic content loading, old refs are stale. Run gsd-browser snapshot to get fresh refs.
Use --json when parsing output. Use text mode when reading output yourself. Use --json when you need to extract values programmatically (e.g., checking assertion results, parsing snapshot refs).
Positional args have no flag prefix. Commands like click, type, hover take positional args — do NOT add --selector. See exact syntax in command reference below.
Use batch for atomic multi-step flows. Batch reduces round trips and keeps pass/fail checks in one call. Use separate commands when you need intermediate output (e.g., snapshot to discover refs).
Use view when the user wants to watch or direct the browser. The live viewer is an authenticated local workbench with Control, Annotate, Record, and Sensitive modes. Keep CLI commands on the same named session.

Core Workflow

Every browser automation follows this pattern:

Navigate: gsd-browser navigate <url>
Snapshot: gsd-browser snapshot (get versioned refs like @v1:e1, @v1:e2)
Interact: Use refs to click, fill, hover
Re-snapshot: After navigation or DOM changes, get fresh refs

gsd-browser navigate https://example.com/form
gsd-browser snapshot
# Output: @v1:e1 [input type="email"], @v1:e2 [input type="password"], @v1:e3 [button] "Submit"

gsd-browser fill-ref @v1:e1 "[email protected]"
gsd-browser fill-ref @v1:e2 "password123"
gsd-browser click-ref @v1:e3
gsd-browser wait-for --condition network_idle
gsd-browser snapshot  # REQUIRED — old refs are now stale

Command Chaining

Read the full file on GitHub · 785 lines

Files

What ships with it

8 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

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.

4d ago First seen · 785 lines · 157 tokens per session scan A 1c2ddf15262c

Subscribe to this mod's changes

gsd-browser is a skill published in the GitHub repository skillmds/skillmd (1 stars, last pushed yesterday), licensed MIT. It adds 157 tokens to every session and 6,933 once invoked, about $0.0006 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to gsd-browser, differing in 1 line, and is treated as a copy.

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