What is implementation-engineer?

An implementation engineer agent that turns an agreed design into a working reference implementation. It builds layered fetching, parsing, caching, and APIs, including URL normalization, redirect and SSRF protection, Open Graph parsing fallbacks, and cache keys.

Use it for reference implementations, example code, and scaffolding for systems that fetch, parse, cache, and expose web data through an API.

It helps translate a design into concrete code while covering the main data-fetching and safety details.

How revfactory/opengraph configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to revfactory/opengraph. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/revfactory/opengraph/main/.claude/agents/implementation-engineer.md

Clone the repo

git clone --depth 1 https://github.com/revfactory/opengraph

Made for: Claude Code.

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.

README.md

[![agentmods](https://agentmods.dev/badge/agents/revfactory/opengraph/implementation-engineer/github.svg)](https://agentmods.dev/agents/revfactory/opengraph/implementation-engineer)

Your own site

<a href="https://agentmods.dev/agents/revfactory/opengraph/implementation-engineer"><img src="https://agentmods.dev/badge/agents/revfactory/opengraph/implementation-engineer/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/agents/revfactory/opengraph/implementation-engineer"><img src="https://agentmods.dev/badge/agents/revfactory/opengraph/implementation-engineer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 107 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.

When invoked 879 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.

Model	Per session	Once invoked
Fable 5.1	$0.00107	$0.00879
Opus 5.5	$0.00043	$0.00352
Sonnet 5.5	$0.00021	$0.00176
Haiku 4.5	$0.00011	$0.00088

Measured 2mo ago against content hash ac50cd8910a8, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

implementation-engineer 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 2mo 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.

.claude/agents/implementation-engineer.md · 40 lines

The source is not reproduced here

No licence file

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.

2mo ago First seen · 40 lines · 107 tokens per session scan A ac50cd8910a8

Subscribe to this mod's changes

implementation-engineer is an agent published in the GitHub repository revfactory/opengraph (5 stars, last pushed 4mo ago), with no licence file. It adds 107 tokens to every session and 879 once invoked, about $0.0004 per session on Opus 5.5. 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 2026-08-31.

Backend and APIs Security

implementation-engineer next to 6 agents from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
implementation-engineerrevfactory/opengraph	Agent	5	4mo ago	none	A	107	Claude Code
php-developerdavepoon/buildwithclaude	Agent	3.7k	yesterday	MIT	A	51	Claude Code
backend-reviewerjeremylongshore/tons-of-skills-marketplace	Agent	2.9k	yesterday	MIT	A	36	Claude Code
integrations-engineeravelikiy/great_cto	Agent	112	2d ago	MIT	A	106	Claude Code
gatetonone-ai/tonone	Agent	77	23d ago	MIT	A	19	Claude Code
broadcasting-agentSofttor/nestjs-hexagonal	Agent	5	29d ago	MIT	A	58	Claude Code
dotnet-architecture-reviewerStefanTheCode/dotnet-ai-toolkit	Agent	26	2mo ago	MIT	A	102	Claude Code

opengraph: Agent for Claude Code