Anti-Backrooms Agent Skill

Use whenever anything is written, edited, named, or shown that a person or another agent will read or look at, including every visual…

Context cost
6.7k tokensestimated from the bundle, loaded when it triggers
Bundle
3 files · 26.9 kBtext throughout, nothing executable
Licence
not declarednone named by its author
Last change
—v1.13.0
Servers it uses
Noneruns standalone

What it does

Use whenever anything is written, edited, named, or shown that a person or another agent will read or look at, including every visual, spatial, or printed artifact and equally the surfaces that do not look like design work: comments, commit messages, names, reusable instructions, and the prose beside configuration. Apply while composing, not only when a critique is asked for, even when the task sounds like coding, configuration, or routine communication.

What this skill changes about the agent has not been set out here as a list. Its SKILL.md, shown below, says it in the author’s own words.

agentdesign
Filed under

Design & Media

The skill itself

A skill is instructions the model reads, so you can see what you are getting: below is the start of its SKILL.md. The front matter loads with every session, the body loads when the skill triggers, and the whole file comes with the install.

SKILL.md23.2 kB · preview
--- name: "anti-backrooms" metadata: author: "Leeor Nahum" version: "1.13.0" ---
9# Anti-Backrooms
10
11Use this skill to catch a class of failure that is hard to express with ordinary rules: the output is not exactly false, but it feels wrong.
12
13The Backrooms are the right metaphor. Everything looks almost normal, but the whole space is still wrong: too repetitive, too detached from purpose, too large or too small, poorly connected, or subtly impossible. AI-generated artifacts fail the same way. A UI, deck, diagram, document, PDF, landing page, or booth plan can be locally coherent while globally incoherent.
14
15Use this skill to avoid building artifacts that feel like a no-clipped average of nearby patterns instead of something intentionally designed for a real human, a real task, and a real space.
16
17An artifact is anything a person or another agent will read or look at later: a screen, a slide, a document, a comment in code, a commit message, a name, a label, a reply, a reusable instruction, a configuration and the sentence that explains it. The skill applies to the sentence being written now, not only to the deliverable reviewed at the end.
18
19The core test is simple: do not only ask whether each part is valid. Ask whether the whole artifact and its language make sense for a real human to understand, inhabit, read, scan, click, project, print, or physically approach.
20
21The guiding principle is that the artifact should not violate the laws of human normalcy. A violation can be subtle: everything may be locally plausible, but the whole thing feels robotic, backrooms-like, or wrong for the actual viewer path.
22
23The Backrooms metaphor works because the space is familiar but not placeable. Objects repeat without purpose, rooms are segmented but not meaningfully organized, scale feels off even when nothing is obviously broken, navigation exists but does not produce confidence, and the world seems assembled from averages of real places rather than from one real place.
24
25That is exactly how many AI artifacts fail: correct local syntax with wrong global intent, valid components with invalid composition, reasonable words with unreasonable placement, polished visuals with no believable human path, and internal context accidentally sucked into the public artifact.
26
27## Workflow
This is a preview of SKILL.md. Download or install the skill to get the whole thing.
In the file
SKILL.md3,774 words
Files3
Licencenot declared
Why you can read it

Nothing in a skill executes. The client loads the text and the model follows it, so a skill can be audited the way a runbook is — by reading it.

What it costs in context

Skills are not billed by the call. They are paid for in context: every token the instructions occupy is a token your code, your diff and your conversation cannot use. Here is what this one takes and when it takes it.

≈250
always loaded
The name and description, so the model knows the skill exists and when to reach for it.
6,475
on trigger
The instruction body and 2 supporting files, read only when the skill fires.
3.4%
of a 200k window
Ten skills this size would take about 34% of the window before you open a file.
050k100k150k200k context window

6.7k tokens, estimated from the bundle at four bytes to the token, held for the rest of the session once it triggers. Heavy. Teams tend to install this one per project rather than globally, and load it only when the job comes up.

Servers bill, skills cost

A server charges by the month. A skill charges once per session, in context, and then keeps charging it for as long as the session lives.

Before and after

The same question, put to the same model twice: once as it comes, and once with these instructions loaded.

No worked example has been published for this skill yet.

The procedure it runs

The procedure has not been set out here step by step. It is in the body of its SKILL.md: the start of it is shown above, and the whole file comes with the install.

Prose, not code

These steps are written for a model to follow, not executed by a runtime. It can still be told to skip one, and it will say so when it does.

Servers it uses

None. This skill calls no MCP servers at all.

Everything it needs is in the instructions, so it works in a project with nothing connected — the model reads the file and changes how it works with what it can already reach.

Its SKILL.md does not declare which tools it asks the agent for, so what it touches is whatever the instructions themselves ask for — read them before you install it.

What it asks for
Writes filesnot declared
Network accessnot declared

This SKILL.md carries no allowed-tools line, so neither is declared. A skill grants no permissions of its own — it can only ask for tools your client already has.

What it will not do

Every skill is narrow, and the useful ones say where they stop. These are the jobs this one is the wrong tool for.

What this skill is not for has not been published here. Nothing is implied by that: it is a section the author has not filled in.

What is in the bundle

3 files, 26.9 kB on disk. A bundle is text throughout: the instructions the model reads, plus the templates it fills in.

  • SKILL.md23.2 kB
  • AGENTS.md2.7 kB
  • README.md1.0 kB
What is not in it

No dependencies and nothing executable: a skill is text the agent reads, so the bundle is 3 files you can review in full before installing.

Install

Installing copies the bundle into your project. Nothing runs at install time — the files sit on disk until the model reads them.

# Anti-Backrooms · 6.7k tokens when loaded · macOS, Linux mkdir -p .claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/anti-backrooms/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/anti-backrooms" ] && { [ ! -e .claude/skills/anti-backrooms ] || { mv .claude/skills/anti-backrooms "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/anti-backrooms" .claude/skills/ && echo "Installed .claude/skills/anti-backrooms"
On Windows, or any OS with Node 20+
npx mcprush@latest skill add leeornahum/anti-backrooms

Windows PowerShell says 'running scripts is disabled on this system'? Run Set-ExecutionPolicy -Scope CurrentUser RemoteSigned once, or type npx.cmd instead of npx (codex.cmd, gemini.cmd, grok.cmd likewise). PowerShell 7 needs neither. Writes to .claude/skills/anti-backrooms/ in the current project. For every project instead, run mkdir -p ~/.claude/skills && t=$(mktemp -d) && curl -fsSL -o "$t/bundle.tar.gz" https://mcprush.com/api/skills/anti-backrooms/bundle.tar.gz && tar -xzf "$t/bundle.tar.gz" -C "$t" && [ -d "$t/anti-backrooms" ] && { [ ! -e ~/.claude/skills/anti-backrooms ] || { mv ~/.claude/skills/anti-backrooms "$t/.previous" && echo "Previous copy moved to $t/.previous"; }; } && mv "$t/anti-backrooms" ~/.claude/skills/ && echo "Installed ~/.claude/skills/anti-backrooms" (macOS, Linux) — or add --global to the npx line. The curl line replaces .claude/skills/anti-backrooms/ only after the download succeeds, so files left there by another skill of the same name, or by an older release, do not mix in. A copy already there is moved aside, not deleted, and the line prints where.

Which clients pick it up on their own

A skill is a folder of text. Most of these read a skills folder and pick it up without being told; the rest take the same folder another way — an upload in the app, a parameter on an API call — and then choose it by its description just the same.

Claude Code.claude/skills/
Claude DesktopCustomize › Skills
ChatGPTSkills › Create › Upload
Cursor.cursor/skills/
VS Code.github/skills/
Codex CLI.agents/skills/
Gemini CLI.gemini/skills/
Grok Build.grok/skills/
Microsoft CopilotSkills › Upload a skill
PerplexityComputer › Skills › Upload a skill
DeepSeek Harness.dsh/skills/
Zed.agents/skills/
Devin Desktop.devin/skills/
Windsurf (legacy).windsurf/skills/
OpenAI Agents SDKInstructions or sandbox Skills
HTTP / APIa request parameter
This release
Version1.13.0
Publishedno release date on file
PriceFree
Referenceleeornahum/anti-backrooms

Versions

v1.13.0 is what is on the shelf; no release here carries a date. Instructions change more often than APIs do — a skill can be rewritten entirely without anything it depends on moving.

v1.13.0
  • No earlier releases have been published to the marketplace.
Pinning

The install command always fetches the release that is current the day you run it — v1.13.0 today — and cannot ask for an earlier one. The copy on your disk does not change until you run it again.

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