Skill Claude CodeCodex
Database migration best practices for schema changes, data migrations, rollbacks, and zero-downtime deployments across PostgreSQL, MySQL, and common ORMs (Prisma, Drizzle, Django, TypeORM, golang-migrate).
Skill Claude CodeCodex
Database migration best practices for schema changes, data migrations, rollbacks, and zero-downtime deployments across PostgreSQL, MySQL, and common ORMs (Prisma, Drizzle, Django, TypeORM, golang-migrate).
Skill Claude CodeCodex
Principal-level datacenter operations — Uptime Institute tier model, BICSI / ANSI-TIA-942 structured cabling, power + cooling + space (PUE / WUE / CUE), physical security, capacity planning, change + incident management, vendor + SLA management, colocation strategy, and the operational discipline that keeps physical…
Skill Claude CodeCodex
Dependency hygiene — dependency-pinning (lockfiles committed, image digest pins, Actions SHA-pinned), dependency-vulnerabilities (CVE gate: MODERATE+ blocks), dependency-overrides-not-exceptions (fix the tree first via pnpm.overrides), license-allowlist-gate (SPDX allowlist + Trove cross-check), install-allowlist (no…
Skill Claude CodeCodex
Deployment workflows, CI/CD pipeline patterns, Docker containerization, health checks, rollback strategies, and production readiness checklists for web applications.
Skill Claude CodeCodex
Principal-level design system practice — design tokens, multi-platform theming, component API design, accessibility built-in, versioning + governance, contribution model, documentation, and the discipline that turns "one team's component library" into a load-bearing capability for every product surface — including…
Skill Claude CodeCodex
Human-centred problem solving via Stanford d.school / IDEO five-stage cycle (Empathize → Define → Ideate → Prototype → Test). Activates on UX research, service design, innovation workshops, problem-framing sessions, or when the solution space is unknown and the users are not the designers.
Skill Claude Code
Django + Django REST Framework implementation discipline — project layout, model design, DRF serializers/viewsets, service layer, caching, signals, middleware, query performance, AND the full Django security surface (SECURE settings, authentication, authorization, SQL-injection and XSS prevention, CSRF, file-upload…
Skill Claude Code
Docker and Docker Compose patterns for local development, container security, networking, volume strategies, and multi-service orchestration. Also lazy-loads docker-deployment.md / docker-localhost-binding.md content migrated from rules/common/ on 2026-06-02.
Skill Claude Code
Dockerfile + container discipline — multi-stage builds (build → runtime); pinned base image with tag + sha256 digest; non-root USER mandatory; COPY over ADD (except verified tarball); chained apt-get install + cache cleanup in same RUN layer; explicit WORKDIR; exec-form CMD/ENTRYPOINT; layer ordering least-frequent →…
Skill Claude CodeCodex
DynamoDB single-table design, composite keys, GSI design, conditional writes, BatchWrite/BatchGet chunking, atomic counters, TTL, streams, and cross-tenant isolation patterns. Auto-fires for files importing from @aws-sdk/lib-dynamodb or @aws-sdk/client-dynamodb.
Skill Claude CodeCodex
Playwright E2E testing patterns — Page Object Model, configuration, CI/CD integration, artifact management, flaky test strategies, PLUS the decision-time patterns that come before the first test is written (black-box helper scripts, static-vs-dynamic routing, multi-server orchestration, reconnaissance-then-action…
Skill Claude CodeCodex
Principal-level patterns for K-12 + higher-ed + corporate-learning platforms — LTI 1.3 / LTI Advantage, xAPI 2.0 (IEEE 9274.1.1-2023), cmi5, SCORM 1.2 + 2004 (4th Ed), OneRoster 1.2, Caliper Analytics 1.2, QTI 3.0, Common Cartridge 1.3, Open Badges 3.0 (W3C VC), AccessForAll 3.0, IRT-based adaptive assessment, UDL…
Skill Claude CodeCodex
Formal evaluation framework for Claude Code sessions implementing eval-driven development (EDD) principles.
Skill Claude CodeCodex
Principal-level guidance for FERPA (20 USC §1232g), COPPA (15 USC §6501-6506 + 16 CFR Part 312 + 2025 FTC Final Rule), GDPR-K (Art 8), CIPA, state student-privacy laws (SOPIPA, NY Ed Law 2-d, Student Privacy Pledge), and platform compliance for K-12 + higher-ed + edtech. Sister to gdpr-ccpa-compliance…
Skill Claude CodeCodex
Principal-level financial analyst workflow — earnings model maintenance, ratio analysis, accounting quality assessment, channel checks, sector-relative valuation, and producing the daily/weekly/quarterly analyst output that drives institutional investment decisions.
Skill Claude CodeCodex
Principal-level fine-tuning lifecycle — when fine-tuning beats prompting + RAG, dataset curation, instruction tuning vs preference optimisation (SFT / DPO / RLHF), parameter-efficient methods (LoRA / QLoRA / adapters), evaluation, safety re-tuning, deployment, monitoring, and the cost / benefit framework for choosing…
Skill Claude CodeCodex
Financial Planning & Analysis patterns for engineering teams supporting finance — budget vs actual variance, rolling forecasts, driver-based models, scenario planning, SaaS metrics (ARR, MRR, NRR, CAC, LTV, payback, magic number, Rule of 40), cohort analysis, and the data pipeline patterns that make FP&A self-serve.
Skill Claude Code
Frontend development patterns for React, React Native, Vue, Next.js, SwiftUI, Flutter, state management, performance optimization, and UI best practices.
Skill Claude Code
GDPR + CCPA/CPRA implementation patterns — lawful basis documentation, data subject rights, consent management, cross-border transfers, breach notification, DPIA, and RoPA. Implementation arm of the gdpr-ccpa.md rule. Also lazy-loads data-retention.md / audit-logging.md content migrated from rules/common/ on…
Skill Claude CodeCodex
Git + repo discipline — git-workflow (per-org identity, conventional commits, PR workflow), repo-setup-checklist (20-point first-touch security audit), docs-sync-with-code (every PR ships docs + code together), documentation-requirements (Diátaxis four-quadrant: tutorials / how-tos / reference / explanation).…
Skill Claude Code
Idiomatic Go patterns, best practices, and conventions for building robust, efficient, and maintainable Go applications.
Skill Claude CodeCodex
Go testing patterns including table-driven tests, subtests, benchmarks, fuzzing, and test coverage. Follows TDD methodology with idiomatic Go practices.
Skill Claude CodeCodex
Principal-level guidance for HIPAA Privacy + Security + Breach Notification + HITECH + 42 CFR Part 2 compliance — BAAs, minimum-necessary, ePHI encryption, audit controls, breach 60-day clock, OCR enforcement. Sister to gdpr-ccpa-compliance, audit-logging, data-retention, security.
Skill Claude CodeCodex
Principal-level hiring system design — role definition, sourcing, structured interviewing, bar-raising, calibration, offer, and onboarding. Treat hiring as the highest-leverage decision an organisation makes and engineer the process to minimise predictable failure modes (unstructured interviews, halo effect, like-me…
At most 3 mods per repository are shown here, and a mod shipped inside a plugin is left to that plugin's page — the rest are on their repository pages: