gstack/browse/SKILL.md

name, version, description, allowed-tools

name	version	description	allowed-tools
browse	1.1.0	Fast headless browser for QA testing and site dogfooding. Navigate any URL, interact with elements, verify page state, diff before/after actions, take annotated screenshots, check responsive layouts, test forms and uploads, handle dialogs, and assert element states. ~100ms per command. Use when you need to test a feature, verify a deployment, dogfood a user flow, or file a bug with evidence.	Bash Read AskUserQuestion

Update Check (run first)

_UPD=$(~/.claude/skills/gstack/bin/gstack-update-check 2>/dev/null || .claude/skills/gstack/bin/gstack-update-check 2>/dev/null || true)
[ -n "$_UPD" ] && echo "$_UPD" || true

If output shows UPGRADE_AVAILABLE <old> <new>: read ~/.claude/skills/gstack/gstack-upgrade/SKILL.md and follow the "Inline upgrade flow" (AskUserQuestion → upgrade if yes, touch ~/.gstack/last-update-check if no). If JUST_UPGRADED <from> <to>: tell user "Running gstack v{to} (just updated!)" and continue.

browse: QA Testing & Dogfooding

Persistent headless Chromium. First call auto-starts (~3s), then ~100ms per command. State persists between calls (cookies, tabs, login sessions).

SETUP (run this check BEFORE any browse command)

_ROOT=$(git rev-parse --show-toplevel 2>/dev/null)
B=""
[ -n "$_ROOT" ] && [ -x "$_ROOT/.claude/skills/gstack/browse/dist/browse" ] && B="$_ROOT/.claude/skills/gstack/browse/dist/browse"
[ -z "$B" ] && B=~/.claude/skills/gstack/browse/dist/browse
if [ -x "$B" ]; then
  echo "READY: $B"
else
  echo "NEEDS_SETUP"
fi

If NEEDS_SETUP:

1. Tell the user: "gstack browse needs a one-time build (~10 seconds). OK to proceed?" Then STOP and wait.
2. Run: cd <SKILL_DIR> && ./setup
3. If bun is not installed: curl -fsSL https://bun.sh/install | bash

Core QA Patterns

1. Verify a page loads correctly

$B goto https://yourapp.com
$B text                          # content loads?
$B console                       # JS errors?
$B network                       # failed requests?
$B is visible ".main-content"    # key elements present?

2. Test a user flow

$B goto https://app.com/login
$B snapshot -i                   # see all interactive elements
$B fill @e3 "user@test.com"
$B fill @e4 "password"
$B click @e5                     # submit
$B snapshot -D                   # diff: what changed after submit?
$B is visible ".dashboard"       # success state present?

3. Verify an action worked

$B snapshot                      # baseline
$B click @e3                     # do something
$B snapshot -D                   # unified diff shows exactly what changed

4. Visual evidence for bug reports

$B snapshot -i -a -o /tmp/annotated.png   # labeled screenshot
$B screenshot /tmp/bug.png                # plain screenshot
$B console                                # error log

5. Find all clickable elements (including non-ARIA)

$B snapshot -C                   # finds divs with cursor:pointer, onclick, tabindex
$B click @c1                     # interact with them

6. Assert element states

$B is visible ".modal"
$B is enabled "#submit-btn"
$B is disabled "#submit-btn"
$B is checked "#agree-checkbox"
$B is editable "#name-field"
$B is focused "#search-input"
$B js "document.body.textContent.includes('Success')"

7. Test responsive layouts

$B responsive /tmp/layout        # mobile + tablet + desktop screenshots
$B viewport 375x812              # or set specific viewport
$B screenshot /tmp/mobile.png

8. Test file uploads

$B upload "#file-input" /path/to/file.pdf
$B is visible ".upload-success"

9. Test dialogs

$B dialog-accept "yes"           # set up handler
$B click "#delete-button"        # trigger dialog
$B dialog                        # see what appeared
$B snapshot -D                   # verify deletion happened

10. Compare environments

$B diff https://staging.app.com https://prod.app.com

Snapshot Flags

The snapshot is your primary tool for understanding and interacting with pages.

-i        --interactive           Interactive elements only (buttons, links, inputs) with @e refs
-c        --compact               Compact (no empty structural nodes)
-d <N>    --depth                 Limit tree depth (0 = root only, default: unlimited)
-s <sel>  --selector              Scope to CSS selector
-D        --diff                  Unified diff against previous snapshot (first call stores baseline)
-a        --annotate              Annotated screenshot with red overlay boxes and ref labels
-o <path> --output                Output path for annotated screenshot (default: /tmp/browse-annotated.png)
-C        --cursor-interactive    Cursor-interactive elements (@c refs — divs with pointer, onclick)

All flags can be combined freely. -o only applies when -a is also used. Example: $B snapshot -i -a -C -o /tmp/annotated.png

Ref numbering: @e refs are assigned sequentially (@e1, @e2, ...) in tree order. @c refs from -C are numbered separately (@c1, @c2, ...).

After snapshot, use @refs as selectors in any command:

$B click @e3       $B fill @e4 "value"     $B hover @e1
$B html @e2        $B css @e5 "color"      $B attrs @e6
$B click @c1       # cursor-interactive ref (from -C)

Output format: indented accessibility tree with @ref IDs, one element per line.

  @e1 [heading] "Welcome" [level=1]
  @e2 [textbox] "Email"
  @e3 [button] "Submit"

Refs are invalidated on navigation — run snapshot again after goto.

Full Command List

Navigation

Command	Description
back	History back
forward	History forward
goto <url>	Navigate to URL
reload	Reload page
url	Print current URL

Reading

Command	Description
accessibility	Full ARIA tree
forms	Form fields as JSON
html [selector]	innerHTML of selector (throws if not found), or full page HTML if no selector given
links	All links as "text → href"
text	Cleaned page text

Interaction

Command	Description
click <sel>	Click element
cookie <name>=<value>	Set cookie on current page domain
cookie-import <json>	Import cookies from JSON file
cookie-import-browser [browser] [--domain d]	Import cookies from Comet, Chrome, Arc, Brave, or Edge (opens picker, or use --domain for direct import)
dialog-accept [text]	Auto-accept next alert/confirm/prompt. Optional text is sent as the prompt response
dialog-dismiss	Auto-dismiss next dialog
fill <sel> <val>	Fill input
header <name>:<value>	Set custom request header (colon-separated, sensitive values auto-redacted)
hover <sel>	Hover element
press <key>	Press key — Enter, Tab, Escape, ArrowUp/Down/Left/Right, Backspace, Delete, Home, End, PageUp, PageDown, or modifiers like Shift+Enter
scroll [sel]	Scroll element into view, or scroll to page bottom if no selector
select <sel> <val>	Select dropdown option by value, label, or visible text
type <text>	Type into focused element
upload <sel> <file> [file2...]	Upload file(s)
useragent <string>	Set user agent
viewport <WxH>	Set viewport size
`wait <sel	--networkidle

Inspection

Command	Description
`attrs <sel	@ref>`
`console [--clear	--errors]`
cookies	All cookies as JSON
css <sel> <prop>	Computed CSS value
dialog [--clear]	Dialog messages
eval <file>	Run JavaScript from file and return result as string (path must be under /tmp or cwd)
is <prop> <sel>	State check (visible/hidden/enabled/disabled/checked/editable/focused)
js <expr>	Run JavaScript expression and return result as string
network [--clear]	Network requests
perf	Page load timings
storage [set k v]	Read all localStorage + sessionStorage as JSON, or set to write localStorage

Visual

Command	Description
diff <url1> <url2>	Text diff between pages
pdf [path]	Save as PDF
responsive [prefix]	Screenshots at mobile (375x812), tablet (768x1024), desktop (1280x720). Saves as {prefix}-mobile.png etc.
`screenshot [--viewport] [--clip x,y,w,h] [selector	@ref] [path]`

Snapshot

Command	Description
snapshot [flags]	Accessibility tree with @e refs for element selection. Flags: -i interactive only, -c compact, -d N depth limit, -s sel scope, -D diff vs previous, -a annotated screenshot, -o path output, -C cursor-interactive @c refs

Meta

Command	Description
chain	Run commands from JSON stdin. Format: [["cmd","arg1",...],...]

Tabs

Command	Description
closetab [id]	Close tab
newtab [url]	Open new tab
tab <id>	Switch to tab
tabs	List open tabs

Server

Command	Description
restart	Restart server
status	Health check
stop	Shutdown server