Ten rules skill

Ten Rules

A router over thirty-nine "10 rules" reference sets in ref/ — seventeen cross-cutting disciplines plus twenty-two industry verticals. Before doing the work, load the rules that match the task, apply their checklists, then execute — do not skip straight to output.

1. Route the task

Match the strongest signal to a domain. If several apply (e.g. an LLM product launch page = ai-engineering + web-design + growth-marketing), load each one's index.

Core sets

Task signals	Domain	Open first
website, landing page, UI/UX, layout, redesign, visual hierarchy, accessibility, web perf/Core Web Vitals	web-design	ref/web-design/INDEX.md
writing, email, message, report, slide narrative, persuasion, explaining, feedback, docs clarity	communication	ref/communication/INDEX.md
stock, equity, valuation, portfolio, buy/sell, thesis, risk, KR stocks, trading bot	investment	ref/investment/INDEX.md
planning doc, PRD, spec, proposal, RFP, project/service/business plan	planning	ref/planning/INDEX.md
explicit "follow coding-agent rules / Ten Commandments"	coding	ref/coding/INDEX.md

Builder stack

Task signals	Domain	Open first
REST/HTTP API, endpoint, contract, OpenAPI, versioning, status codes, idempotency, rate limit	api-design	ref/api-design/INDEX.md
data model, SQL, ETL/ELT pipeline, warehouse, schema, partitioning, data quality, dbt, lineage	data-engineering	ref/data-engineering/INDEX.md
security review, authn/authz, OWASP, injection, XSS, secrets, threat model, least privilege	security	ref/security/INDEX.md
reliability, SLO/error budget, CI/CD, deploy, rollback, incident, postmortem, observability, IaC, on-call	devops-sre	ref/devops-sre/INDEX.md
LLM/AI feature, prompt, eval, RAG, agent, guardrails, hallucination, model selection	ai-engineering	ref/ai-engineering/INDEX.md
product discovery, prioritization, roadmap, success metric, North Star, MVP, jobs-to-be-done	product-management	ref/product-management/INDEX.md
user research, usability test, user interview, survey, heuristic evaluation, research plan	ux-research	ref/ux-research/INDEX.md
growth, acquisition, funnel, activation, retention, positioning, messaging, product/market fit	growth-marketing	ref/growth-marketing/INDEX.md
SEO, search ranking, keywords, search intent, E-E-A-T, structured data, indexing	seo	ref/seo/INDEX.md
pricing, unit economics, LTV/CAC, contribution margin, gross margin, burn/runway, cohort, break-even	finance-unit-economics	ref/finance-unit-economics/INDEX.md
brand, positioning, naming, logo, voice/tone, visual identity, differentiation	brand-identity	ref/brand-identity/INDEX.md
privacy, GDPR/PIPA/CCPA, consent, personal data, retention/deletion, DSAR, data residency	data-privacy-legal	ref/data-privacy-legal/INDEX.md

Industry verticals — building a site or software for a specific industry. Layer these on top of the disciplines above (e.g. an online pharmacy = ecommerce-retail + healthcare-digital-health + data-privacy-legal; a Palantir-style tool = enterprise-data-platform + security + b2b-saas).

Task signals	Domain	Open first
online store, shopping mall, marketplace, cart, checkout, product catalog, storefront (Amazon/Coupang/Shopify)	ecommerce-retail	ref/ecommerce-retail/INDEX.md
course platform, LMS, e-learning, quizzes, student data, edtech	edtech-learning	ref/edtech-learning/INDEX.md
video/audio streaming, OTT, subscriptions, content catalog, playback, recommendations	media-streaming	ref/media-streaming/INDEX.md
game backend, live-ops, matchmaking, player retention, in-game economy, anti-cheat	gaming-liveops	ref/gaming-liveops/INDEX.md
social network, feed, UGC, community, moderation, trust & safety, network effects	social-community	ref/social-community/INDEX.md
internal data platform, ontology, B2B analytics, enterprise RBAC, data governance (Palantir-style)	enterprise-data-platform	ref/enterprise-data-platform/INDEX.md
smart factory, MES, industrial IoT, OT/IT, ISA-95, digital twin, semiconductor fab (Hynix-style)	manufacturing-industrial	ref/manufacturing-industrial/INDEX.md
logistics, supply chain, fulfillment, WMS/TMS, last-mile, shipment tracking	logistics-supply-chain	ref/logistics-supply-chain/INDEX.md
multi-tenant SaaS, B2B app, SSO/SCIM, seat billing, enterprise readiness, SOC 2	b2b-saas	ref/b2b-saas/INDEX.md
IoT, connected devices, telemetry, MQTT, OTA updates, device fleet, edge	iot-connected-devices	ref/iot-connected-devices/INDEX.md
smart grid, utility billing, metering, energy, ESG/sustainability reporting	energy-utilities	ref/energy-utilities/INDEX.md
banking, payments, neobank, wallet, ledger, KYC/AML, PCI, open banking (Toss/Stripe-style)	fintech-banking	ref/fintech-banking/INDEX.md
telemedicine, EHR, patient portal, FHIR, HIPAA, digital health	healthcare-digital-health	ref/healthcare-digital-health/INDEX.md
insurance, claims, underwriting, policy admin, insurtech	insurance-insurtech	ref/insurance-insurtech/INDEX.md
government, public sector, citizen services, accessibility/Section 508, gov.uk service standard, digital identity	govtech-public-sector	ref/govtech-public-sector/INDEX.md
airport, airline, hotel, booking, reservation, OTA, flight ops, travel (IATA/NDC)	travel-hospitality-aviation	ref/travel-hospitality-aviation/INDEX.md
marketing platform, CDP, ad server, attribution, campaign, consent/TCF, adtech	martech-adtech	ref/martech-adtech/INDEX.md
real estate, property listings, MLS, proptech, virtual tours, transactions	real-estate-proptech	ref/real-estate-proptech/INDEX.md
ride-hailing, transit app, mapping/routing, EV charging, dispatch, mobility (Uber-style)	mobility-transportation	ref/mobility-transportation/INDEX.md
telecom, carrier, OSS/BSS, 5G, billing/charging, TM Forum	telecom-connectivity	ref/telecom-connectivity/INDEX.md
HR, recruiting, ATS, hiring, HRIS, candidate experience, hrtech	hrtech-recruiting	ref/hrtech-recruiting/INDEX.md
nonprofit, charity, donations, fundraising, NGO, civic platform	nonprofit-civic	ref/nonprofit-civic/INDEX.md

No domain matches → this skill does not apply; proceed normally.

2. Apply (same for every domain)

1. Read the domain INDEX.md. Pick the 1–5 rules that actually bear on this task — not all ten.
2. Read only those full rule files (each has Why / How to apply / Checklist).
3. Before producing output, state in one line each which rules you are applying and why.
4. Do the work so it satisfies every selected rule's checklist.
5. Self-check against those checklists. Fix gaps before claiming done.

3. Notes

• Progressive: INDEX first, then specific rule files. Never dump all rules into context.
• investment has overlays — load kr-equity/ only for Korean (KOSPI/KOSDAQ) stocks, and quant-bot/ only for an automated/agentic trading system.
• coding duplicates the Ten Commandments already in ~/.claude/CLAUDE.md. Skip it unless the user explicitly asks, or you are running outside Claude Code (e.g. Codex/Gemini) without those rules.
• The five core sets are vendored snapshots of upstream repos — refresh with scripts/refresh.sh. The twelve builder-stack sets and the twenty-two industry verticals are authored in-repo from the authorities cited in each rule's References; refresh.sh does not touch them.

Source repos

Core sets — web-design · communication · investment · planning · coding — vendored from github.com/cskwork/{web-design-10-rules, communication-10-rules, investment-agent-rules, planning-doc-rules, coding-agent-rules}.

Builder stack — api-design · data-engineering · security · devops-sre · ai-engineering · product-management · ux-research · growth-marketing · seo · finance-unit-economics · brand-identity · data-privacy-legal — authored in-repo from recognized authorities (OWASP, Google SRE/AIP, NIST, Kimball, Nielsen Norman, GDPR, et al.) cited in each rule's References.

Industry verticals — ecommerce-retail · edtech-learning · media-streaming · gaming-liveops · social-community · enterprise-data-platform · manufacturing-industrial · logistics-supply-chain · b2b-saas · iot-connected-devices · energy-utilities · fintech-banking · healthcare-digital-health · insurance-insurtech · govtech-public-sector · travel-hospitality-aviation · martech-adtech · real-estate-proptech · mobility-transportation · telecom-connectivity · hrtech-recruiting · nonprofit-civic — authored in-repo from each industry's recognized books and standards (Baymard, Mayer, Kleppmann, ISA-95, HL7 FHIR, PCI-DSS, IATA NDC, GOV.UK Service Standard, et al.) cited in each rule's References.