build-writer-e2e

build-writer-e2e is an agent for Claude Code from Automattic/radical-pipelines. It costs 41 tokens per session (1,220 once invoked), scanned A, original, GPL-3.0.

An agent that turns one task from a build plan into automated end-to-end tests. End-to-end tests check a feature across the whole application, rather than checking one small part in isolation.

In plain words
What is it for?
It is for implementing the end-to-end test work assigned in a build plan and checking whether the completed feature behaves as required.
Why use it?
It removes the need to manually translate test requirements from build-plan.md into test code. The tests are intended to meet the plan's stated acceptance criteria.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md).

Part of the radical-pipelines plugin — 1 skill, 18 agents shipped together

Good fit It is for implementing the end-to-end test work assigned in a build plan and checking whether the completed feature behaves as required.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/automattic/radical-pipelines/build-writer-e2e
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.

Clone the repo
git clone --depth 1 https://github.com/Automattic/radical-pipelines

Made for: Claude Code.

Or install radical-pipelines, the plugin that ships this one along with the rest of its 1 skill, 18 agents.

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.

agentmods badge for build-writer-e2e

README.md
[![agentmods](https://agentmods.dev/badge/agents/automattic/radical-pipelines/build-writer-e2e.svg)](https://agentmods.dev/agents/automattic/radical-pipelines/build-writer-e2e)
Your own site
<a href="https://agentmods.dev/agents/automattic/radical-pipelines/build-writer-e2e"><img src="https://agentmods.dev/badge/agents/automattic/radical-pipelines/build-writer-e2e.svg" alt="Measured on agentmods" height="20"></a>
Per session 41 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,220 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 5.1 $0.00041 $0.01220
Opus 5 $0.00020 $0.00610
Sonnet 5 $0.00008 $0.00244
Haiku 4.5 $0.00004 $0.00122

Measured 8d ago against content hash 0fec48b1ddb5, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

build-writer-e2e 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 8d 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.

agents/build-writer-e2e.md · 56 lines

The source is not reproduced here

Licensed GPL-3.0

The repository is licensed GPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

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. 8d ago First seen · 56 lines · 41 tokens per session scan A 0fec48b1ddb5

Subscribe to this mod's changes

build-writer-e2e is an agent published in the GitHub repository Automattic/radical-pipelines (11 stars, last pushed today), licensed GPL-3.0. It adds 41 tokens to every session and 1,220 once invoked, about $0.0002 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.

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