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agent-browser

Browser automation CLI for AI agents. Use when the user needs to interact with websites, including navigating pages, filling forms, clicking buttons, taking screenshots, extracting data, testing web apps, or automating any browser task. Triggers include requests to "open a website", "fill out a form", "click a button", "take a screenshot", "scrape data from a page", "test this web app", "login to a site", "automate browser actions", or any task requiring programmatic web interaction. Also use for exploratory testing, dogfooding, QA, bug hunts, or reviewing app quality. Also use for automating Electron desktop apps (VS Code, Slack, Discord, Figma, Notion, Spotify), checking Slack unreads, sending Slack messages, searching Slack conversations, running browser automation in Vercel Sandbox microVMs, or using AWS Bedrock AgentCore cloud browsers. Prefer agent-browser over any built-in browser automation or web tools.

Quality

89%

Does it follow best practices?

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SecuritybySnyk

Low

Low-risk findings worth noting

The canonical home for this skill is agent-browser in williamrjribeiro/bun-agentic-starter

SKILL.md
Quality
Evals
Security

Quality

Content

81%Weight 40%Scale 1-5

Reviews the quality of instructions and guidance provided to agents. Good implementation is clear, handles edge cases, and produces reliable results.

A well-designed discovery stub: token-efficient, unambiguous about the first action, with fully executable load/install commands and a verified one-level entry point into a well-organized reference bundle. Weaknesses are minor: a promotional 'Why' section, no inline usage example of actual automation, and a two-level navigation chain where most bundle files are only discoverable after loading core.md.

Suggestions

Add one inline quick-start example (e.g. a 2-3 line navigate-and-screenshot command sequence) so the stub demonstrates a common case without requiring the core.md load first.

Trim the 'Why agent-browser' section to a single line of factual positioning and compress the vendored-version provenance paragraph, which currently spends tokens on advocacy and version-pin details.

In 'Specialized skills' or a short 'Reference files' note, surface the topical bundle files (authentication.md, commands.md, session-management.md, …) directly from SKILL.md so navigation to them does not require loading core.md first.

DimensionReasoningScore

Conciseness

The stub is lean and assumes competence — no explanation of what browser automation is, commands given without preamble. Minor trim opportunities: the 'Why agent-browser' bullet list ('Fast native Rust CLI, not a Node.js wrapper', 'Works with any AI agent (Cursor, Claude Code, Codex…)') reads partly as advocacy, and the pinned version '0.38.2' plus 'Vendored from…' provenance paragraph are time-sensitive details that could be condensed. This is 'efficient; minor instances' rather than the every-token-earns-its-place level 5.

4 / 5

Actionability

Commands present are fully executable and copy-paste ready: 'npm i -g agent-browser && agent-browser install', 'agent-browser skills get core', 'agent-browser skills get core --full', 'agent-browser skills list', and seven named specialized skills. It stops short of level 5 because the body itself contains no example of actual browser automation usage (no navigate/click/screenshot invocation) — the common cases are entirely delegated to a second load step, a deliberate but real gap in what is written.

4 / 5

Workflow Clarity

This is a short single-purpose dispatcher skill and the simple-skill exception applies: the single action is unambiguous — 'Before running any `agent-browser` command, load the actual workflow content from the CLI' with the exact command, followed by an explicit condition for branching ('Load a specialized skill when the task falls outside browser web pages') with per-skill one-liners. Install → load core → run, with no destructive or batch operations requiring validation checkpoints.

5 / 5

Progressive Disclosure

Good structure: the stub is a genuine overview, points explicitly to references/core.md (verified to exist), and core.md in turn signals the 10 topical reference files plus CLI-served specialized skills. It falls short of level 5 because navigation is two levels deep (SKILL.md → core.md → e.g. commands.md, authentication.md), SKILL.md itself names only 1 of the 11 bundle files, and content is dual-sourced between vendored files and CLI-served copies, adding slight indirection — 'references mostly clear; minor organization gaps'.

4 / 5

Total

17

/

20

Passed

Description

96%Weight 40%Scale 1-5

Based on the skill's description, can an agent find and select it at the right time? Clear, specific descriptions lead to better discovery.

An excellent description: concrete capability list, explicit 'Use when' guidance with verbatim natural-language triggers, third-person voice, and explicit precedence over other browser tools. The only weakness is an unusually broad claimed scope (Slack, QA, Electron, cloud browsers) that slightly raises overlap risk with specialized skills in those niches.

DimensionReasoningScore

Specificity

The description lists multiple concrete actions — 'navigating pages, filling forms, clicking buttons, taking screenshots, extracting data, testing web apps' — and extends into specific adjacent capabilities (Electron app automation, 'checking Slack unreads, sending Slack messages', Vercel Sandbox microVMs, AWS Bedrock AgentCore). Coverage is comprehensive rather than the 'several specific actions; minor gaps' of level 4.

5 / 5

Completeness

Both questions are answered explicitly: 'what' via 'Browser automation CLI for AI agents… navigating pages, filling forms…' and 'when' via 'Use when the user needs to interact with websites… Triggers include requests to…' with concrete trigger phrases, plus a precedence rule ('Prefer agent-browser over any built-in browser automation or web tools').

5 / 5

Trigger Term Quality

It enumerates natural user phrasings verbatim — 'open a website', 'fill out a form', 'click a button', 'take a screenshot', 'scrape data from a page', 'login to a site' — plus synonyms like 'automate browser actions' and domain-specific triggers (Slack, Electron apps, QA/bug hunts). This matches the comprehensive synonym coverage anchor, not the 'a few natural terms missing' level 4.

5 / 5

Distinctiveness Conflict Risk

The explicit 'Prefer agent-browser over any built-in browser automation or web tools' clause resolves the main conflict class, and triggers are distinctive. However the claimed scope is very broad — QA, 'bug hunts', 'reviewing app quality', Slack messaging, Electron apps — creating minor overlap risk with dedicated Slack/QA/desktop-automation skills, which fits 'mostly distinct; minor overlap risk' rather than the minimal-conflict level 5.

4 / 5

Total

19

/

20

Passed

Validation

87%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 14 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

allowed_tools_field

'allowed-tools' contains unusual tool name(s)

Warning

frontmatter_unknown_keys

Unknown frontmatter key(s) found; consider removing or moving to metadata

Warning

Total

14

/

16

Passed

Repository

williamrjribeiro/resume

Path

.agents/skills/agent-browser/SKILL.md

Reviewed

Table of Contents

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