webapp-testing

Web app testing

Anthropic

Verifies a local browser journey and produces reproducible evidence without deploying the application.

License: Apache-2.0
Risk: High

Understand

Covered goals

test a local web application
verify UI behavior
capture reproducible browser evidence

Inputs → outputs

local application URL or static HTML file
user journey and expected behavior
server command and port when the application is not already running

native Python Playwright automation script
observed UI behavior, screenshots, rendered DOM evidence, or browser console logs

Recognize

Triggers

test this web app
validate a UI flow
reproduce a browser issue

Non-triggers

deploy an application
test a remote production mutation without authorization
replace unit tests with screenshots

Choose

Permissions

write and execute scoped Python Playwright scripts
launch a local browser and read rendered application state
start and stop explicitly scoped local application servers
interact with and potentially mutate local test application state

External effects

local browser and optional application-server processes are started and stopped
Python scripts, screenshots, DOM captures, and logs can be written to disk
browser actions can mutate the local application's test state

Compatibility

local web applications in a Python environment with Playwright and Chromium

Check permissions and confirm every external effect before using this skill.

Compare

Understand → Recognize → Choose → Compare

Pack for your agent

Pre-written instruction by SkillCodex — your request is neither sent nor used to adapt this text; no content is generated, and copying executes nothing.

usage

Use in your agent

# Use Web app testing in your agent

## Objective
Use the existing webapp-testing skill only when it directly covers the requested task.

## Prerequisites
- local application URL or static HTML file
- user journey and expected behavior
- server command and port when the application is not already running
- Python
- Playwright synchronous API and Chromium
- optional scripts/with_server.py helper for local server lifecycle

## Permissions
- write and execute scoped Python Playwright scripts
- launch a local browser and read rendered application state
- start and stop explicitly scoped local application servers
- interact with and potentially mutate local test application state

## External effects
- local browser and optional application-server processes are started and stopped
- Python scripts, screenshots, DOM captures, and logs can be written to disk
- browser actions can mutate the local application's test state

## Procedure
- Open the canonical source pinned to revision fa0fa64bdc967915dc8399e803be67759e1e62b8.
- Read the skill instructions before calling its tools.
- Ask for confirmation before any paid, destructive, or remote effect not already authorized.
- Run the procedure within the requested scope and retain useful evidence.

## Non-goals
- deploy an application
- test a remote production mutation without authorization
- replace unit tests with screenshots

## Expected result
- native Python Playwright automation script
- observed UI behavior, screenshots, rendered DOM evidence, or browser console logs

sha256:13b7f3901b67bc159ee3a5c9689ac4f3f60f951568f52e9299ef33d1f87acf64

verification

Verify in your agent

# Verify Web app testing in your agent

## Result to check
Verify the use of webapp-testing for the current bounded task.

## Failure signals
- The source or revision does not match the manifest.
- A permission or external effect was not disclosed.
- The output does not match the expected artifacts.
- The skill activated for a declared non-trigger.

## Checks
- Compare the SHA-256 of SKILL.md with sha256:51b7349e77ec63b7744a6f63647e7566a0b4d2e301121cc10e8c2113af6556a2.
- Confirm the permissions actually used and the observed effects.
- Verify artifacts with the narrowest available test.
- Separate local, browser, and external evidence in the report.

## Expected result
- native Python Playwright automation script
- observed UI behavior, screenshots, rendered DOM evidence, or browser console logs

sha256:32d1a72fd21386f53e99feab5d057c91af2d589920f06e0ce8f370b7234c8074

Pack digest: sha256:c3aaa2175608c0a36b8114a35c72c07d9f61a1929bb0f1d51aa38455e5654448

Source and verification

Open the canonical source

Source revision: fa0fa64bdc967915dc8399e803be67759e1e62b8
Verified on
Digest: sha256:51b7349e77ec63b7744a6f63647e7566a0b4d2e301121cc10e8c2113af6556a2

Understand

Covered goals

test a local web application
verify UI behavior
capture reproducible browser evidence

Inputs → outputs

local application URL or static HTML file
user journey and expected behavior
server command and port when the application is not already running

native Python Playwright automation script
observed UI behavior, screenshots, rendered DOM evidence, or browser console logs

Choose

Permissions

write and execute scoped Python Playwright scripts
launch a local browser and read rendered application state
start and stop explicitly scoped local application servers
interact with and potentially mutate local test application state

External effects

local browser and optional application-server processes are started and stopped
Python scripts, screenshots, DOM captures, and logs can be written to disk
browser actions can mutate the local application's test state

Compatibility

local web applications in a Python environment with Playwright and Chromium

Check permissions and confirm every external effect before using this skill.

# Use Web app testing in your agent ## Objective Use the existing webapp-testing skill only when it directly covers the requested task. ## Prerequisites - local application URL or static HTML file - user journey and expected behavior - server command and port when the application is not already running - Python - Playwright synchronous API and Chromium - optional scripts/with_server.py helper for local server lifecycle ## Permissions - write and execute scoped Python Playwright scripts - launch a local browser and read rendered application state - start and stop explicitly scoped local application servers - interact with and potentially mutate local test application state ## External effects - local browser and optional application-server processes are started and stopped - Python scripts, screenshots, DOM captures, and logs can be written to disk - browser actions can mutate the local application's test state ## Procedure - Open the canonical source pinned to revision fa0fa64bdc967915dc8399e803be67759e1e62b8. - Read the skill instructions before calling its tools. - Ask for confirmation before any paid, destructive, or remote effect not already authorized. - Run the procedure within the requested scope and retain useful evidence. ## Non-goals - deploy an application - test a remote production mutation without authorization - replace unit tests with screenshots ## Expected result - native Python Playwright automation script - observed UI behavior, screenshots, rendered DOM evidence, or browser console logs

# Verify Web app testing in your agent ## Result to check Verify the use of webapp-testing for the current bounded task. ## Failure signals - The source or revision does not match the manifest. - A permission or external effect was not disclosed. - The output does not match the expected artifacts. - The skill activated for a declared non-trigger. ## Checks - Compare the SHA-256 of SKILL.md with sha256:51b7349e77ec63b7744a6f63647e7566a0b4d2e301121cc10e8c2113af6556a2. - Confirm the permissions actually used and the observed effects. - Verify artifacts with the narrowest available test. - Separate local, browser, and external evidence in the report. ## Expected result - native Python Playwright automation script - observed UI behavior, screenshots, rendered DOM evidence, or browser console logs