essence

essence is a command for Claude Code from Xiaoyun-0922/openmarx. It costs 35 tokens per session (388 once invoked), scanned A, original, MIT.

An analysis command that separates visible symptoms from underlying causes in bugs, unstable experiments, low adoption, and repeated failures. It uses evidence before explaining the root cause.

In plain words
What is it for?
Use it to investigate recurring bugs, unreliable experiments, repeated project failures, or a product that is not gaining users.
Why use it?
It helps avoid fixing only what is most noticeable when the same problem keeps returning. The required verification rule makes it possible to check whether the proposed cause and remedy hold up.

Command for Claude Code

Written for Claude Code: argument-hint in frontmatter.

Part of the marx plugin — 1 skill, 16 commands, 3 hooks shipped together

Good fit Use it to investigate recurring bugs, unreliable experiments, repeated project failures, or a product that is not gaining users.

Compare 6 commands from other repositories ↓
Install with agentmods
npx agentmods add commands/xiaoyun-0922/openmarx/essence
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.

Clone the repo
git clone --depth 1 https://github.com/Xiaoyun-0922/openmarx

Made for: Claude Code.

Or install marx, the plugin that ships this one along with the rest of its 1 skill, 16 commands, 3 hooks.

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 essence

README.md
[![agentmods](https://agentmods.dev/badge/commands/xiaoyun-0922/openmarx/essence.svg)](https://agentmods.dev/commands/xiaoyun-0922/openmarx/essence)
Your own site
<a href="https://agentmods.dev/commands/xiaoyun-0922/openmarx/essence"><img src="https://agentmods.dev/badge/commands/xiaoyun-0922/openmarx/essence.svg" alt="Measured on agentmods" height="20"></a>
Per session 35 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 388 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 $0.00035 $0.00388
Opus 5 $0.00017 $0.00194
Sonnet 5 $0.00007 $0.00078
Haiku 4.5 $0.00003 $0.00039

Measured 8d ago against content hash 479ccdbd41b4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

essence 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 8d 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.

Origin

Copies of this mod

4 near-identical copies found in the catalogue:

  • totality — 86% identical, 14 lines differ
  • review — 86% identical, 16 lines differ
  • stage — 81% identical, 14 lines differ
  • history — 75% identical, 15 lines differ
commands/essence.md · 37 lines

What it actually says

Activate the marx skill and distinguish surface symptoms from root cause.

Response language policy:

  • Match the user's language.
  • Keep required contract labels exactly: 已检查证据:, 未检查项目证据:, 实践方案, and 验证标准.
  • Provide bilingual output only when explicitly requested.

Evidence pass:

  • For project/repository/GitHub/adoption tasks, inspect local evidence first.
  • Start with 已检查证据 or 未检查项目证据.
  • First visible output line must be either 已检查证据: or 未检查项目证据: before any title, table, horizontal rule, or summary. Use an ASCII colon :, not a full-width Chinese colon . Do not use variants such as 已检查项目证据:.
  • Do not start with a horizontal rule, generic title, or 证据表; the evidence line comes first.

Evidence freshness:

  • Mark prior-turn facts as reused evidence, not freshly inspected evidence.
  • If a concrete implementation target matters, inspect it this turn or label it as an assumption.

Required final sections:

  • Include 实践方案 and 验证标准 exactly in every project-grounded answer.
  • Do not rename these sections to "next steps", "建议", "接下来的路", or "最小下一步验证".
  • 验证标准 must contain an observable pass/fail rule or measurable metric.

Output focus:

  • 表面现象
  • 可能本质
  • 根因候选
  • 区分根因所需证据
  • 最小下一步验证

User request: $ARGUMENTS

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. 8d ago First seen · 37 lines · 35 tokens per session scan A 479ccdbd41b4

Subscribe to this mod's changes

essence is a command published in the GitHub repository Xiaoyun-0922/openmarx (5 stars, last pushed 4mo ago), licensed MIT. It adds 35 tokens to every session and 388 once invoked, about $0.0002 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 2026-08-31.