A coding-agent skill that uses Marxist ideas to examine research, engineering, project, debugging, retrospective, and organizational problems. It turns concepts such as root cause and the main contradiction into a practical analysis.

Use it to diagnose stalled projects, investigate root causes, plan experiments or improvements, review past work, and examine open-source adoption or organizational problems.

It gives a structured way to look past symptoms and separate the central problem from secondary issues. It also requires project evidence before making concrete judgments when that evidence is available.

marx — Skill for Claude Code by Xiaoyun-0922

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 Xiaoyun-0922/openmarx --skill marx

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/xiaoyun-0922/openmarx/marx/github.svg)](https://agentmods.dev/skills/xiaoyun-0922/openmarx/marx)

Your own site

<a href="https://agentmods.dev/skills/xiaoyun-0922/openmarx/marx"><img src="https://agentmods.dev/badge/skills/xiaoyun-0922/openmarx/marx/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/xiaoyun-0922/openmarx/marx"><img src="https://agentmods.dev/badge/skills/xiaoyun-0922/openmarx/marx.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 88 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,678 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.

Model	Per session	Once invoked
Fable 5.1	$0.00088	$0.02678
Opus 5	$0.00044	$0.01339
Sonnet 5	$0.00018	$0.00536
Haiku 4.5	$0.00009	$0.00268

Measured 9d ago against content hash 4de9ff38b600, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

marx 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.

codex/marx/SKILL.md · 200 lines

How it starts

The opening of the file, as written. The whole thing — 200 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Marx Practice for Codex

Turn Marxist philosophy into concrete project diagnosis and practice design. This is not a macro-theory explainer.

Response language policy

Match the user's language for the explanation.
Keep required contract labels in their exact form for project-grounded answers: 已检查证据:, 未检查项目证据:, 实践方案, and 验证标准.
In English contexts where Chinese labels risk mojibake, use ASCII aliases: Evidence checked:, No project evidence inspected:, Practice plan, and Validation criteria.
If the user's prompt is Chinese or mostly Chinese, do not use the ASCII aliases. Use 已检查证据: or 未检查项目证据:, and use 实践方案 and 验证标准 as section headings.
If the user explicitly asks for bilingual output, provide both languages; otherwise do not add a second language.
Keep this SKILL.md in English except for stable command labels and theory terms that must be recognized literally.

Evidence-first project mode

For concrete project, codebase, repository, service, CI, test, performance, API, release, environment, adoption, GitHub star, or "nobody uses it" problems, inspect local project evidence before analysis when tools are available:

current location, repository state, and top-level files
AGENTS.md, CLAUDE.md, README, package manifests, test scripts, CI configs
relevant source files, tests, logs, configs, docs, API specs, releases, errors, or examples
obvious targeted verification commands

Windows PowerShell note: when reading UTF-8 project files in Windows PowerShell 5.1, use Get-Content -Encoding UTF8. If text appears as mojibake, reread it with -Encoding UTF8 before treating it as project evidence.

Start with exactly one evidence line:

已检查证据: files, commands, logs, docs, or outputs actually inspected
未检查项目证据: no local project evidence was inspected; analysis is based only on the prompt
English aliases are valid when the answer is otherwise in English: Evidence checked: and No project evidence inspected:.

Read the full file on GitHub · 200 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.

9d ago First seen · 200 lines · 88 tokens per session scan A 4de9ff38b600

Subscribe to this mod's changes

marx is a skill published in the GitHub repository Xiaoyun-0922/openmarx (5 stars, last pushed 4mo ago), licensed MIT. It adds 88 tokens to every session and 2,678 once invoked, about $0.0004 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.

Claude Code Research agent-workflow ai-skills codex open-source

resume-tailor

Use when the user has a specific job posting and wants to customize their resume, CV, work document, and/or cover letter for that role. Also use when they say "I'm applying to..." or share a job link.

Remotivated/job-hunt-skills · 49 tokens

resume-builder

Use when the user wants to create or update a source work document in resume or CV format, or create a source cover letter from scratch. Triggers on US resumes ("build my resume") and UK/EU-style work CVs ("build my CV", "I need a CV for a UK role", "European CV"). US academic CVs are out of scope. For first-time…

Remotivated/job-hunt-skills · 94 tokens

claim-check

Use when the user wants a final truth pass before submitting a resume, CV, cover letter, LinkedIn section, or application package. Also use when they ask whether a draft contains unsupported, inflated, or hallucinated claims.

Remotivated/job-hunt-skills · 48 tokens

interview-coach

Use when the user has an upcoming interview, received an interview invitation, or wants to prepare for a specific role at a specific company.

Remotivated/job-hunt-skills · 32 tokens

linkedin-optimizer

Use when the user wants to improve their LinkedIn profile, rewrite their headline, about, or experience sections, or audit individual profile fields.