browse

browse is a skill for Claude Code from mr-daedalium/ostack-saas. It costs 115 tokens per session (5,419 once invoked), scanned C, a copy of ostack, MIT.

A headless browser for testing websites without manually opening and operating a browser window.

In plain words
What is it for?
Use it to visit URLs, interact with page elements, verify states, compare before-and-after results, and capture annotated screenshots.
Why use it?
It makes it easier to check whether pages, forms, uploads, dialogs, and responsive layouts behave correctly after changes.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: reads .claude/ paths; names the AskUserQuestion tool; mentions Codex.

Good fit Use it to visit URLs, interact with page elements, verify states, compare before-and-after results, and capture annotated screenshots.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/mr-daedalium/ostack-saas/browse
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 mr-daedalium/ostack-saas --skill browse
Clone the repo
git clone --depth 1 https://github.com/mr-daedalium/ostack-saas

Made for: Claude Code.

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.

agentmods badge for browse

README.md
[![agentmods](https://agentmods.dev/badge/skills/mr-daedalium/ostack-saas/browse/github.svg)](https://agentmods.dev/skills/mr-daedalium/ostack-saas/browse)
Your own site
<a href="https://agentmods.dev/skills/mr-daedalium/ostack-saas/browse"><img src="https://agentmods.dev/badge/skills/mr-daedalium/ostack-saas/browse/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.

agentmods 80×15 button for browse

Your own site · 80×15
<a href="https://agentmods.dev/skills/mr-daedalium/ostack-saas/browse"><img src="https://agentmods.dev/badge/skills/mr-daedalium/ostack-saas/browse.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 115 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,419 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 2 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 89% 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00115 $0.05419
Opus 5 $0.00057 $0.02710
Sonnet 5 $0.00023 $0.01084
Haiku 4.5 $0.00012 $0.00542

Measured 11d ago against content hash 1c001a865855, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade C, and why

browse scanned grade C with 2 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 11d ago.

The scan reads SKILL.md. This mod also ships 32 executable files (scripts/build-node-server.sh, src/browser-manager.ts, src/buffers.ts, …), 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.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

3. If `bun` is not installed: `curl -fsSL https://bun.sh/install | bash`

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

3. If `bun` is not installed: `curl -fsSL https://bun.sh/install | bash`
Origin

This is a copy

89% identical to ostack — 276 lines 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.

browse/SKILL.md · 469 lines

How it starts

The opening of the file, as written. The whole thing — 469 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Preamble (run first)

_UPD=$(~/.claude/skills/ostack/bin/ostack-update-check 2>/dev/null || .claude/skills/ostack/bin/ostack-update-check 2>/dev/null || true)
[ -n "$_UPD" ] && echo "$_UPD" || true
mkdir -p ~/.ostack/sessions
touch ~/.ostack/sessions/"$PPID"
_SESSIONS=$(find ~/.ostack/sessions -mmin -120 -type f 2>/dev/null | wc -l | tr -d ' ')
find ~/.ostack/sessions -mmin +120 -type f -delete 2>/dev/null || true
_CONTRIB=$(~/.claude/skills/ostack/bin/ostack-config get ostack_contributor 2>/dev/null || true)
_PROACTIVE=$(~/.claude/skills/ostack/bin/ostack-config get proactive 2>/dev/null || echo "true")
_BRANCH=$(git branch --show-current 2>/dev/null || echo "unknown")
echo "BRANCH: $_BRANCH"
echo "PROACTIVE: $_PROACTIVE"
source <(~/.claude/skills/ostack/bin/ostack-repo-mode 2>/dev/null) || true
REPO_MODE=${REPO_MODE:-unknown}
echo "REPO_MODE: $REPO_MODE"

If PROACTIVE is "false", do not proactively suggest ostack skills — only invoke them when the user explicitly asks. The user opted out of proactive suggestions.

If output shows UPGRADE_AVAILABLE <old> <new>: read ~/.claude/skills/ostack/ostack-upgrade/SKILL.md and follow the "Inline upgrade flow" (auto-upgrade if configured, otherwise AskUserQuestion with 4 options, write snooze state if declined). If JUST_UPGRADED <from> <to>: tell user "Running ostack v{to} (just updated!)" and continue.

AskUserQuestion Format

ALWAYS follow this structure:

  1. Recommendation: "Do X because Y." One sentence. Position first.
  2. Options: A) ... B) ... — two options, three max if genuinely needed. When an option involves effort, show both scales: (human: ~X / CC: ~Y)

Skip AskUserQuestion entirely if there's a clear right answer — just do it and report.

Never hedge. Never pad with "great question." Never restate context the user already has. Compress ruthlessly. Trust the user to keep up.

Read the full file on GitHub · 469 lines

Files

What ships with it

48 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.

  1. 11d ago First seen · 469 lines · 115 tokens per session scan C 1c001a865855

Subscribe to this mod's changes

browse is a skill published in the GitHub repository mr-daedalium/ostack-saas (111 stars, last pushed 5mo ago), licensed MIT. It adds 115 tokens to every session and 5,419 once invoked, about $0.0006 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). It is 89% identical to ostack, differing in 276 lines, and is treated as a copy.

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