gsd-browser

---

name: gsd-browser description: > Native Rust browser automation CLI for AI agents. Use when the user needs to interact with websites, navigate pages, fill forms, click buttons, take screenshots, extract structured data, run assertions, test web apps, mock network requests, or automate any browser task. Triggers include "open a website", "fill out a form", "take a screenshot", "scrape data", "test this web app", "login to a site", "visual regression test", or any task requiring programmatic web interaction. allowed-tools: Bash(gsd-browser:*), Bash(gsd-browser *)

<essential_principles>

The daemon auto-starts. Never run gsd-browser daemon start. It launches on first command. Only use daemon stop to clean up when finished.

Always re-snapshot after page changes. Refs are versioned (@v1:e1, @v2:e3). After navigation, form submission, or dynamic content loading, old refs are stale. Run gsd-browser snapshot to get fresh refs before interacting.

Use --json when parsing output. Use text mode when reading output yourself. Use --json when you need to extract values programmatically.

Positional args have no flag prefix. Commands like click, type, hover take positional args. Do NOT add --selector:

• gsd-browser click "button.submit" (correct)
• gsd-browser click --selector "button.submit" (WRONG)

Core workflow pattern: Every browser automation follows: navigate -> snapshot -> interact -> re-snapshot (after DOM changes).

gsd-browser navigate https://example.com
gsd-browser snapshot
# Read snapshot output: @v1:e1 [input type="email"], @v1:e2 [button] "Submit"
gsd-browser fill-ref @v1:e1 "user@example.com"
gsd-browser click-ref @v1:e2
gsd-browser wait-for --condition network_idle
gsd-browser snapshot  # REQUIRED - old refs are now stale

Command chaining: Use && when you don't need intermediate output. Run separately when you need to parse output first (e.g., snapshot to discover refs, then interact).

Global options available on all commands:

Flag	Purpose
--json	Structured JSON output
--browser-path <path>	Path to Chrome/Chromium
--session <name>	Named session for parallel instances

</essential_principles>

Based on what the user needs, read the appropriate workflow:

User intent	Workflow
Navigate, click, type, fill forms, interact with pages	workflows/navigate-and-interact.md
Scrape data, extract content, read page structure	workflows/scrape-and-extract.md
Test pages, run assertions, visual regression, mock network	workflows/test-and-assert.md
Debug issues, check logs, diagnose problems	workflows/debug-and-diagnose.md
Install, configure, set up sessions	workflows/setup-and-configure.md

After reading the workflow, follow it. Load references only when the workflow directs you to.

<reference_index>

All domain knowledge in references/:

Commands: command-reference.md (all 63 commands with exact syntax) Snapshots: snapshot-and-refs.md (versioned refs, snapshot modes) Intents: semantic-intents.md (15 predefined intents for find-best/act) Errors: error-recovery.md (common errors and fixes) Config: configuration.md (TOML config, env vars, 5-layer merge)

</reference_index>

<workflows_index>

Workflow	Purpose
navigate-and-interact.md	Page navigation, clicking, typing, forms, intents
scrape-and-extract.md	Data extraction, accessibility tree, page source
test-and-assert.md	Assertions, visual regression, network mocking, test generation
debug-and-diagnose.md	Console/network logs, timeline, debug bundles
setup-and-configure.md	Installation, configuration, sessions, daemon management

</workflows_index>

<success_criteria>

Browser automation task is complete when:

• Target page state is achieved and verified (via assertions or visual confirmation)
• Daemon is stopped if no further browser work is needed (gsd-browser daemon stop)
• Extracted data is returned in the expected format
• Any saved state (auth, cookies) is persisted for reuse if appropriate

</success_criteria>