What is og-reference-implementation?

A reference implementation that turns an agreed software design into working code for fetching and parsing web-page metadata, exposing an API, caching results, and recording failures.

Use it for a proof of concept, example code, or project scaffolding involving URL normalisation, safe fetching, fallback parsing, hierarchical promotion, caching, APIs, and failure measurement.

It gives developers an executable example to review when building a system that reads Open Graph data from URLs. It also covers safety checks for server-side request forgery, an attack that tricks a server into requesting protected internal addresses.

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/skills/og-reference-implementation/SKILL.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/skills/revfactory/opengraph/og-reference-implementation/github.svg)](https://agentmods.dev/skills/revfactory/opengraph/og-reference-implementation)

Your own site

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

Per session 105 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 889 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	$0.00105	$0.00889
Opus 5.5	$0.00042	$0.00356
Sonnet 5.5	$0.00021	$0.00178
Haiku 4.5	$0.00011	$0.00089

Measured 2mo ago against content hash 508a05ba868b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

og-reference-implementation 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/skills/og-reference-implementation/SKILL.md · 46 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 · 46 lines · 105 tokens per session scan A 508a05ba868b

Subscribe to this mod's changes

og-reference-implementation is a skill published in the GitHub repository revfactory/opengraph (5 stars, last pushed 4mo ago), with no licence file. It adds 105 tokens to every session and 889 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

og-reference-implementation next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
og-reference-implementationrevfactory/opengraph	Skill	5	4mo ago	none	A	105	Claude Code
mem0-oss-to-platformmem0ai/mem0	Skill	68k	2d ago	Apache-2.0	A	217	Claude Code, Codex
azure-mgmt-botservice-dotnetmicrosoft/skills	Skill	3.2k	yesterday	MIT	A	78	Claude Code
fastapi-router-pymicrosoft/skills	Skill	3.2k	yesterday	MIT	A	46	Claude Code
dev-runtimelangwatch/langwatch	Skill	5.0k	yesterday	Apache-2.0	A	172	Claude Code
api-designericrisco/rsc-harness	Skill	503	2d ago	MIT	A	105	Claude Code, Codex
migrate-segw-to-raparc-mcp/arc-1	Skill	252	yesterday	MIT	A	106	Claude Code

opengraph: Skill for Claude Code