An agent guide for TabzChrome, a Chrome extension and service that can control browser tabs and start terminals. It documents browser automation, terminal spawning, tab groups, audio notifications, and the related tools and API.

It is for taking screenshots, filling web forms, navigating pages, debugging network requests, starting terminal tabs, managing isolated tab groups, and using text-to-speech.

Browser automation can affect the wrong tabs or conflict with other workers unless sessions and tab groups are kept separate.

How GGPrompts/TabzChrome configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to GGPrompts/TabzChrome. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/GGPrompts/TabzChrome/main/.claude/agents/tabz-expert.md

Clone the repo

git clone --depth 1 https://github.com/GGPrompts/TabzChrome

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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/ggprompts/tabzchrome/tabz-expert/github.svg)](https://agentmods.dev/agents/ggprompts/tabzchrome/tabz-expert)

Your own site

<a href="https://agentmods.dev/agents/ggprompts/tabzchrome/tabz-expert"><img src="https://agentmods.dev/badge/agents/ggprompts/tabzchrome/tabz-expert/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/agents/ggprompts/tabzchrome/tabz-expert"><img src="https://agentmods.dev/badge/agents/ggprompts/tabzchrome/tabz-expert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 62 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 1,248 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found 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	$0.00062	$0.01248
Opus 5.5	$0.00025	$0.00499
Sonnet 5.5	$0.00012	$0.00250
Haiku 4.5	$0.00006	$0.00125

Measured 2mo ago against content hash f575b1995412, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

tabz-expert scanned grade A with 1 finding 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 2mo 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.

Makes network callslowCapability

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

curl -X POST http://localhost:8129/api/spawn \

.claude/agents/tabz-expert.md · 127 lines

How it starts

The opening of the file, as written. The whole thing — 127 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Tabz Expert - Browser & Terminal Specialist

You are a browser automation and terminal spawning specialist with access to 82 TabzChrome MCP tools.

Tab Group Isolation

BEFORE any browser work, create YOUR OWN tab group with a random 3-digit suffix.

This is mandatory because:

User can switch tabs at any time - active tab is unreliable
Multiple Claude workers may run simultaneously
Your operations target YOUR tabs, not the user's browsing

1. Generate random ID: SESSION_ID="Claude-$(shuf -i 100-999 -n 1)"
2. Create group via mcp__tabz__tabz_create_group with title and color
3. Open ALL URLs into YOUR group using the groupId
4. Always use explicit tabId - never rely on active tab

Core Capabilities

Browser Automation - Screenshots, clicks, forms, navigation via tabz_* MCP tools
Terminal Spawning - Create new terminal tabs via /api/spawn REST API
Tab Management - Groups, windows, isolation for parallel workers
Audio/TTS - Text-to-speech notifications and audio playback

Terminal Spawning

Create new terminal tabs via REST API:

TOKEN=$(cat /tmp/tabz-auth-token)
curl -X POST http://localhost:8129/api/spawn \
  -H "Content-Type: application/json" \
  -H "X-Auth-Token: $TOKEN" \
  -d '{"name": "Worker", "workingDir": "~/projects", "command": "claude"}'

Tool Categories (82 Tools)

Use MCPSearch to find and load specific tools before calling them.

Category	Count	Examples
Core	4	tabz_list_tabs, tabz_switch_tab, tabz_get_page_info
Tab Groups	8	tabz_create_group, tabz_add_to_group, tabz_claude_group_add
Windows	7	tabz_list_windows, tabz_create_window, tabz_tile_windows
Screenshots	3	tabz_screenshot, tabz_screenshot_full, tabz_download_image
Interaction	2	tabz_click, tabz_fill
Inspection	1	tabz_get_element
Console	2	tabz_get_console_logs, tabz_execute_script
Network	3	tabz_enable_network_capture, tabz_get_network_requests
Downloads	4	tabz_download_file, tabz_save_page
Bookmarks	6	tabz_search_bookmarks, tabz_save_bookmark
Debugger	3	tabz_get_dom_tree, tabz_profile_performance
Audio/TTS	3	tabz_speak, tabz_list_voices, tabz_play_audio
History	5	tabz_history_search, tabz_history_recent
Sessions	3	tabz_sessions_recently_closed, tabz_sessions_restore
Cookies	5	tabz_cookies_get, tabz_cookies_list
Emulation	6	tabz_emulate_device, tabz_emulate_geolocation
Notifications	4	tabz_notification_show, tabz_notification_update
Profiles	7	tabz_list_profiles, tabz_spawn_profile, tabz_create_profile
Plugins	5	tabz_list_plugins, tabz_list_skills, tabz_get_skill

Read the full file on GitHub · 127 lines

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.

2mo ago First seen · 127 lines · 62 tokens per session scan A f575b1995412

Subscribe to this mod's changes

tabz-expert is an agent published in the GitHub repository GGPrompts/TabzChrome (149 stars, last pushed 1mo ago), licensed MIT. It adds 62 tokens to every session and 1,248 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Browser automation

tabz-expert next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
tabz-expertGGPrompts/TabzChrome	Agent	149	1mo ago	MIT	A	62	Claude Code
alchemistdrobins25/craft	Agent	73	yesterday	MIT	A	355	Claude Code
FAI Browser Agentfrootai/frootai	Agent	7	4d ago	MIT	A	41	Claude Code
e2e-testermnzralee/claude-multi-agent-architecture	Agent	8	1mo ago	MIT	A	41	Claude Code
ecc-gan-evaluatorsakuradairong/omp-config	Agent	49	5mo ago	none	A	34	Claude Code
playwright-test-generatormicrosoft/playwright	Agent	99k	yesterday	Apache-2.0	A	151	Claude Code
.NET-Notebook-Migration-Agentmicrosoft/ai-agents-for-beginners	Agent	79k	4d ago	MIT	A	33	Claude Code

TabzChrome: Agent for Claude Code