yaojingang/yao-open-skills is a public collection of reusable AI skills for research, decision-making, business analysis, learning, and document creation. It serves people who want repeatable, maintainable AI workflows instead of isolated prompts, and catalogued add-ons are published skills from this collection.
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.
npx skills add yaojingang/yao-open-skills --skill yao-crux-skillgit clone --depth 1 https://github.com/yaojingang/yao-open-skillsWrote 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.
[](https://agentmods.dev/skills/yaojingang/yao-open-skills/yao-crux-skill)<a href="https://agentmods.dev/skills/yaojingang/yao-open-skills/yao-crux-skill"><img src="https://agentmods.dev/badge/skills/yaojingang/yao-open-skills/yao-crux-skill/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.
<a href="https://agentmods.dev/skills/yaojingang/yao-open-skills/yao-crux-skill"><img src="https://agentmods.dev/badge/skills/yaojingang/yao-open-skills/yao-crux-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00149 | $0.02165 |
| Opus 5 | $0.00075 | $0.01082 |
| Sonnet 5 | $0.00030 | $0.00433 |
| Haiku 4.5 | $0.00015 | $0.00216 |
Grade A, and why
yao-crux-skill 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 13d 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.
How it starts
The opening of the file, as written. The whole thing — 97 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Yao Crux Skill
Use this skill to first clarify the user's current situation, then turn it into a principal-contradiction diagnosis, a secondary-contradiction watchlist, a focused action plan, and a four-format report bundle.
Use This Skill For
- ask concise follow-up questions before judging a user's current situation
- assess whether the user's current situation is clear enough for diagnosis before naming the principal contradiction
- produce a confirmable current-state snapshot with goal, facts, stage, resources, constraints, stakeholders, and repeated patterns
- identify goals, stage, constraints, facts, stakeholders, resources, and repeated conflict patterns
- rewrite messy symptoms as candidate contradictions in the form
力量A 与 力量B 的冲突 - run a first-principles layer scan so the principal contradiction can be an upstream, not-yet-visible constraint rather than the loudest symptom
- use the three plain principal-contradiction checks:
决定性,牵引性, and阶段性 - separate internal changeable structures from external hard conditions, then judge how external conditions act through internal structure
- use Bayesian-style evidence updates and Ockham-razor parsimony as supporting checks when candidate contradictions are close
- score principal and secondary contradictions by goal impact, causal leverage, stage urgency, resource constraint, changeability, spillover risk, and evidence strength
- identify the principal aspect inside the principal contradiction
- recommend 1-3 breakthrough actions that explicitly weaken or reverse the principal aspect, monitoring thresholds, review conditions, and probability projections after action
- make resource and attention allocation decisive when the principal contradiction is clear, typically concentrating 50%-70% of high-leverage resources on the main line
- include visual reasoning modules: analysis flow, iceberg model, contradiction decision matrix, resource allocation, and stage transition map
- write user-facing reports that explicitly use
主要矛盾and次要矛盾, while translating them with practical labels such as最关键的卡点and先不主攻，但要盯住 - export synchronized
markdown,html,docx, andpdfreports using the Kami-style layout rules in this package
What ships with it
54 files 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.
- agents/interface.yaml 1.2 KB
- assets/blue-iceberg-floating-1600.jpg 318 KB
- assets/iceberg-cc0-1600.jpg 522 KB
- assets/iceberg-mcmurdo-1600.jpg 292 KB
- assets/iceberg-photo-source.md 618 B
- assets/iceberg-user-provided.png 1711 KB
- assets/iceberg-usgs-noaa-belowwater.jpg 304 KB
- evals/semantic_config.json 961 B
- evals/test_current_state_clarity.py 2.7 KB runs code
- evals/test_first_principles_team_case.py 1.5 KB runs code
- evals/test_plain_language_report.py 2.1 KB runs code
- evals/test_theory_anchors_and_aggressive_allocation.py 1.9 KB runs code
- evals/test_visual_deep_analysis_report.py 2.4 KB runs code
- evals/trigger_cases.json 1.7 KB
- input/crux_request.template.json 5.0 KB
- input/github_examples/b2b_saas_sales_conversion_case.json 14 KB
- input/github_examples/customer_support_delivery_case.json 14 KB
- input/github_examples/ecommerce_inventory_cashflow_case.json 13 KB
- manifest.json 1018 B
- README.en.md 8.2 KB
- README.md 7.7 KB
- reference-materials/README.md 1.5 KB
- reference-materials/复杂问题主要矛盾识别方法论调研报告.docx 140 KB
- reference-materials/复杂问题主要矛盾识别方法论调研报告.html 46 KB
- reference-materials/矛盾论AI_Skill设计方案.docx 213 KB
- reference-materials/矛盾论底层原理与应用场景研究.docx 192 KB
- references/contradiction-model.md 13 KB
- references/intake-and-questioning.md 8.2 KB
- references/kami-layout-guide.md 4.3 KB
- references/report-contract.md 6.2 KB
- references/report-export-pipeline.md 3.3 KB
- references/safety-and-boundaries.md 1.6 KB
- references/theory-anchors.md 3.4 KB
- reports/github-examples/example-b2b-saas-sales-conversion.docx 42 KB
- reports/github-examples/example-b2b-saas-sales-conversion.html 2330 KB
- reports/github-examples/example-b2b-saas-sales-conversion.md 16 KB
- reports/github-examples/example-b2b-saas-sales-conversion.pdf 1908 KB
- reports/github-examples/example-b2b-saas-sales-conversion.report.json 25 KB
- reports/github-examples/example-customer-support-delivery.docx 42 KB
- reports/github-examples/example-customer-support-delivery.html 2330 KB
- reports/github-examples/example-customer-support-delivery.md 16 KB
- reports/github-examples/example-customer-support-delivery.pdf 1906 KB
- reports/github-examples/example-customer-support-delivery.report.json 24 KB
- reports/github-examples/example-ecommerce-inventory-cashflow.docx 42 KB
- reports/github-examples/example-ecommerce-inventory-cashflow.html 2330 KB
- reports/github-examples/example-ecommerce-inventory-cashflow.md 15 KB
- reports/github-examples/example-ecommerce-inventory-cashflow.pdf 1913 KB
- reports/github-examples/example-ecommerce-inventory-cashflow.report.json 24 KB
- reports/github-examples/README.md 843 B
- scripts/current_state_clarity.py 7.3 KB runs code
- scripts/generate_report_bundle.py 70 KB runs code
- scripts/verify_report_bundle.py 9.8 KB runs code
- templates/crux-report.schema.json 7.4 KB
- templates/report-theme.css 11 KB
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.
- 13d ago First seen · 97 lines · 149 tokens per session scan A 68d6ffc8f208
yao-crux-skill is a skill published in the GitHub repository yaojingang/yao-open-skills (1,314 stars, last pushed 15d ago), licensed MIT. It adds 149 tokens to every session and 2,165 once invoked, about $0.0007 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 2026-08-30.
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