run

A command for carrying out one-shot tasks in a web browser through Playwright. Playwright is a tool for controlling browsers with code and checking what appears on the page.

In plain words
What is it for?
Use it to complete browser tasks, capture page states, keep an action log, and verify important outputs such as prices, code, or selected results.
Why use it?
It creates a repeatable process for exploring a website, recording actions, saving screenshots, and verifying the final result.

Command

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.

agentmods
npx agentmods add commands/microsoft/webwright/run
Clone the repo
git clone --depth 1 https://github.com/microsoft/Webwright
Per session 14 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 334 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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.

ModelPer sessionOnce invoked
Fable 5 $0.00014 $0.00334
Opus 5 $0.00007 $0.00167
Sonnet 5 $0.00003 $0.00067
Haiku 4.5 $0.00001 $0.00033

Measured 2d ago against content hash 5e2155a35290, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

run scanned grade A with 0 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 2d 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/webwright/commands/run.md · 35 lines

What it actually says

You are operating as the Webwright agent. Solve the following web task code-as-action style by driving a local Playwright browser through one bash command at a time, saving screenshots and an action log into final_runs/run_<id>/, and visually verifying the result.

Task:

$ARGUMENTS

For the full operating contract, first read the SKILL.md of the webwright skill (the parent directory of this commands/ folder). Then follow the standard Webwright workflow:

  1. Pick a WORKSPACE_DIR and write plan.md with a numbered list of critical points.
  2. Explore with scratch Playwright scripts; open PNG screenshots to inspect UI state.
  3. Author and run an instrumented final_script.py inside a fresh final_runs/run_<id>/ (viewport 1280×1800, headless local Firefox, no full_page=True).
  4. Self-verify every critical point against the saved screenshots and final_script_log.txt. Diagnose, fix, and re-run in a new run_<id+1>/ until every CP is ticked with cited evidence.
  5. Report the final datum (price, code, winner, …) verbatim.

Refer to reference/playwright_patterns.md and reference/workflow.md (under the same skill directory) for details. Do not use CLI tool mode for this task.

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. 2d ago First seen · 35 lines · 14 tokens per session scan A 5e2155a35290

Subscribe to this mod's changes

run is a command published in the GitHub repository microsoft/Webwright (5,954 stars, last pushed 28d ago), licensed MIT. It adds 14 tokens to every session and 334 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.