etherealness

etherealness is a skill for Claude Code, Codex from Hmbown/Wizards-of-the-Ghosts. It costs 59 tokens per session (928 once invoked), scanned A, original, CC0-1.0.

An observation-only skill that watches or mirrors a system without changing it. It can also examine what would happen through a dry run, where actions are simulated rather than applied.

In plain words
What is it for?
Use it for read-only observation, dry runs, shadow deployments, mirrored environments, and reviewing effects before deciding whether to act.
Why use it?
It lets you investigate production-like behavior while keeping the live system outside the change path. This lowers the risk of learning through a real mutation.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it for read-only observation, dry runs, shadow deployments, mirrored environments, and reviewing effects before deciding whether to act.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/hmbown/wizards-of-the-ghosts/etherealness
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 Hmbown/Wizards-of-the-Ghosts --skill etherealness
Clone the repo
git clone --depth 1 https://github.com/Hmbown/Wizards-of-the-Ghosts

Made for: Claude Code, 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 etherealness

README.md
[![agentmods](https://agentmods.dev/badge/skills/hmbown/wizards-of-the-ghosts/etherealness/github.svg)](https://agentmods.dev/skills/hmbown/wizards-of-the-ghosts/etherealness)
Your own site
<a href="https://agentmods.dev/skills/hmbown/wizards-of-the-ghosts/etherealness"><img src="https://agentmods.dev/badge/skills/hmbown/wizards-of-the-ghosts/etherealness/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 etherealness

Your own site · 80×15
<a href="https://agentmods.dev/skills/hmbown/wizards-of-the-ghosts/etherealness"><img src="https://agentmods.dev/badge/skills/hmbown/wizards-of-the-ghosts/etherealness.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 928 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 $0.00059 $0.00928
Opus 5 $0.00030 $0.00464
Sonnet 5 $0.00012 $0.00186
Haiku 4.5 $0.00006 $0.00093

Measured 9d ago against content hash c3ee80b238bd, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

etherealness 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 9d 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.

generated/hermes/investigation-and-preparation/etherealness/SKILL.md · 75 lines

How it starts

The opening of the file, as written. The whole thing — 75 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Etherealness

Walk through the walls of a system without leaving fingerprints.

What This Skill Does

Etherealness is observational only. It answers "what is happening?" or "what would happen?" without changing anything. The system under study continues normally; you add a ghost layer that watches, mirrors, or dry-runs without becoming part of the live mutation path. In this grimoire, Etherealness is treated as a metaphorical spell with a prototype delivery profile. Canonical reference input: Etherealness (spell).

When To Use

  • You need to observe production-like behavior without writing to the live system.
  • A dry run, shadow deployment, or mirrored environment would answer the question more safely than direct experimentation.
  • You want to inspect effects first and decide later whether crossing fully into action is justified.

Prerequisites

  • No extra runtime dependencies beyond Hermes Agent and the normal toolset for this session.

Procedure

  1. Restate the target, the success condition, and any no-touch boundaries before taking action.
  2. Identify the least invasive observation surface that still answers the question. Prefer: existing metrics/logs → read replicas → shadow deployments → mirrored traffic. Escalate invasiveness only when necessary.
  3. Define the trust boundary. Explicitly state what the ghost view can prove and what it cannot. Dry runs don't capture live contention. Read replicas may lag. Mirrored traffic at 1% doesn't prove behavior at 100%.
  4. Return three deliverables:
  5. The observation setup plan (what to deploy, where, how to connect)
  6. Findings you can safely gather before acting
  7. A caveat list: what ghost mode cannot prove and what requires real execution to validate
  8. Package the result as the deliverables below, with confidence, assumptions, and unresolved risk called out explicitly.

Deliverables

  • A read-only or shadow-observation setup plan.
  • A list of findings you can gather safely before acting.
  • A caveat list for what ghost mode cannot prove.

Read the full file on GitHub · 75 lines

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. 9d ago First seen · 75 lines · 59 tokens per session scan A c3ee80b238bd

Subscribe to this mod's changes

etherealness is a skill published in the GitHub repository Hmbown/Wizards-of-the-Ghosts (107 stars, last pushed 5mo ago), licensed CC0-1.0. It adds 59 tokens to every session and 928 once invoked, about $0.0003 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 2026-09-03.