user-facing-only

user-facing-only is a skill for Codex from Ljhhhhhh/user-facing-only-skill. It costs 64 tokens per session (521 once invoked), scanned A, original, MIT.

Guidance for building Chrome and Edge browser extensions using Manifest V3, the current extension format. It covers permissions, background service workers, content scripts, security, and store rules.

In plain words
What is it for?
Use it when creating or reviewing extension manifests, popup or options pages, content scripts, messaging, and permission settings.
Why use it?
It helps prevent unsafe code and unnecessary permissions that can break an extension or cause a browser-store rejection.

Skill for Codex

Written for Codex: agents/openai.yaml present.

Good fit Use it when creating or reviewing extension manifests, popup or options pages, content scripts, messaging, and permission settings.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ljhhhhhh/user-facing-only-skill/user-facing-only
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.

Any agent
npx skills add Ljhhhhhh/user-facing-only-skill --skill user-facing-only
Clone the repo
git clone --depth 1 https://github.com/Ljhhhhhh/user-facing-only-skill

Made for: Codex.

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 user-facing-only

README.md
[![agentmods](https://agentmods.dev/badge/skills/ljhhhhhh/user-facing-only-skill/user-facing-only/github.svg)](https://agentmods.dev/skills/ljhhhhhh/user-facing-only-skill/user-facing-only)
Your own site
<a href="https://agentmods.dev/skills/ljhhhhhh/user-facing-only-skill/user-facing-only"><img src="https://agentmods.dev/badge/skills/ljhhhhhh/user-facing-only-skill/user-facing-only/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.

agentmods 80×15 button for user-facing-only

Your own site · 80×15
<a href="https://agentmods.dev/skills/ljhhhhhh/user-facing-only-skill/user-facing-only"><img src="https://agentmods.dev/badge/skills/ljhhhhhh/user-facing-only-skill/user-facing-only.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 64 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 521 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 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 5.1 $0.00064 $0.00521
Opus 5.5 $0.00026 $0.00208
Sonnet 5.5 $0.00013 $0.00104
Haiku 4.5 $0.00006 $0.00052

Measured 2mo ago against content hash eef5346e34d1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

user-facing-only 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.

skills/user-facing-only/SKILL.md · 34 lines

How it starts

The opening of the file, as written. The whole thing — 34 lines — stays where its author put it; the contents beside it link to each section on GitHub.

User-Facing Only

Build the latest authorized deliverable for its intended users. Construction instructions may guide implementation, but do not become user-facing content.

Method

  1. Identify the finished artifact, its intended audience, the audience's task, the intended use context, and the latest authorized requirements.
  2. Separate target content from construction context. README notes, seed or fixture data, mock mechanisms, presenter guidance, implementation constraints, and test setup do not become product copy merely because they are true.
  3. Build or review only the authorized target. Implement constraints as behavior instead of narrating them in the artifact.
  4. Inspect the result as an intended user in the intended use context who never saw the construction conversation. Do not substitute an arbitrary recipient, detached screenshot, or hypothetical misuse for the authorized audience and context.

Disclosure gate

A visible disclosure is authorized only when at least one of these is established:

  • the user or current product requirement explicitly requests it;
  • a concrete legal or safety obligation requires it; or
  • omitting it would materially mislead the intended audience in the intended use context.

Provenance alone does not authorize visible attribution. In particular, knowing that data, identities, endpoints, or workflows are seeded, mocked, fictional, or prepared for a demonstration does not by itself justify labels such as demo, sample data, mock, or fictional in the product or export. When the authorized target is a realistic prototype or simulation, preserving the real business presentation is part of the target.

Before reporting a missing-disclosure finding, identify the authorizing requirement or obligation, the affected intended audience, and the concrete material harm caused by omission. If those cannot be established, do not report the absence as a defect. Do not promote developer-facing README statements, fixture metadata, or implementation facts into user-facing requirements.

Read the full file on GitHub · 34 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 2mo ago First seen · 34 lines · 64 tokens per session scan A eef5346e34d1

Subscribe to this mod's changes

user-facing-only is a skill published in the GitHub repository Ljhhhhhh/user-facing-only-skill (2 stars, last pushed 2mo ago), licensed MIT. It adds 64 tokens to every session and 521 once invoked, about $0.0003 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.

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