Engineering handbook for AI coding agents - rules, skills, slash commands, MCP server, and hooks for Cursor, Claude Code, and Codex
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
Structured development workflow with Plan/Implement/Review phases, QA validation, context management, and audit requirements. Enforces explicit authorization for remote mutations, risk-based checkpoints, and proportional audit reports. Use when working on complex tasks, multi-file changes, or when the user mentions…
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
Build AI agents on Cloudflare Workers using the Agents SDK. Load when creating stateful agents, durable workflows, real-time WebSocket apps, scheduled tasks, MCP servers, chat applications, voice agents, or browser automation. Covers Agent class, state management, callable RPC, Workflows, durable execution, queues…
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
AWS IAM deep-dive skill - principal types, policy evaluation, STS assume role, SCP guardrails, KMS key policies/grants, and AccessDenied debugging. Use when designing AWS authz/authn, cross-account access, or troubleshooting IAM/KMS/SCP AccessDenied errors.
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
Bash scripting best practices for production-grade scripts, CLI tools, and Makefiles. Covers strict mode, error handling, portability, performance patterns, and argument parsing. Use when working with .sh files, Makefiles, shell scripts, or when asking about Bash, shell scripting, CLI design, or command-line tools.
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
Cloud platform best practices for AWS, Azure, GCP, and Cloudflare. Covers Zero Trust architecture, IAM patterns, EKS/AKS/GKE configurations, serverless patterns, and multi-cloud strategies. Use when working with cloud infrastructure, AWS services, Azure resources, GCP projects, Cloudflare Workers, or when asking about…
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
Send and receive transactional emails with Cloudflare Email Service (Email Sending + Email Routing). Use when building email sending (Workers binding or REST API), email routing, Agents SDK email handling, or integrating email into any app - Workers, Node.js, Python, Go, etc. Also use for email deliverability…
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
Workflow for crafting Cloudflare WAF rules across all three authoring interfaces - Terraform (cloudflareruleset), the Cloudflare Dashboard, and the Rulesets API. Covers both Custom Rules (actions like block, managedchallenge, log, skip-as-allow) and Managed-Rule Exceptions (action skip). Forces a docs-first read…
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
Workflow for building production-grade Cloudflare Workers in TypeScript - bootstrap, bindings and storage choice, routing (Hono + RPC via WorkerEntrypoint), testing with @cloudflare/vitest-pool-workers, gradual deployments, and common pitfalls. Use when adding a new Worker, adding endpoints to an existing Worker…
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
Comprehensive Cloudflare platform skill covering Workers, Pages, storage (KV, D1, R2), AI (Workers AI, Vectorize, Agents SDK), feature flags (Flagship), networking (Tunnel, Spectrum), security (WAF, DDoS), and infrastructure-as-code (Terraform, Pulumi). Use for any Cloudflare development task. Biases towards retrieval…
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
End-to-end codebase security audit using the practical eight-layer model - secrets scanning (regex + entropy), SAST (with taint analysis), SCA (deps + license), data-flow / taint, semantic / code-property-graph, IaC, custom rules, and DAST validation. Produces a severity-ranked remediation plan, .env templates, and a…
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
Core coding standards and best practices for code review and generation. Provides KISS and measurable clean-code outcomes, guiding principles (DRY, YAGNI, SOLID), priority frameworks, tooling baselines, dependency management, and response formats. Use when reviewing code, generating code, asking about coding…
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
Data engineering workflows for designing and reviewing batch/streaming pipelines across Databricks, Snowflake, Confluent Kafka, and Teradata (contracts, backfills, quality, governance, cost, observability). Use when the user mentions data engineering, ETL/ELT, lakehouse/warehouse, Kafka, Databricks, Snowflake, or…
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
PostgreSQL database design patterns, naming conventions, schema design, migrations, performance optimization, and security best practices. Use when designing database schemas, writing migrations, optimizing queries, or working with PostgreSQL-specific features like JSONB, full-text search, or RLS.
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
Designs and reviews cross-service consistency using Transactional Outbox/Inbox, Saga orchestration, Saga choreography, compensating actions, idempotency, and eventual consistency. Use when the user mentions outbox, inbox, saga, orchestration, choreography, compensation, distributed transaction, dual write, CDC relay…
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
Documentation best practices including Markdown formatting, Mermaid diagrams, technical writing, ADRs, Docusaurus and MDX documentation sites, and open source standards. Use when writing documentation, README files, Markdown or MDX content, creating static diagrams in Markdown, configuring Docusaurus, or asking about…
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
Designs and reviews software domain models using Domain-Driven Design, including subdomains, bounded contexts, context maps, ubiquitous language, aggregates, value objects, domain events, repositories, and anti-corruption layers. Use when business rules are complex, service or module boundaries are unclear, teams…
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
Create and review Cloudflare Durable Objects. Use when building stateful coordination (chat rooms, multiplayer games, booking systems), implementing RPC methods, SQLite storage, alarms, WebSockets, or reviewing DO code for best practices. Covers Workers integration, wrangler config, and testing with Vitest. Biases…
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
Framework-agnostic frontend architecture playbook. Workflows for picking rendering (SSG / SSR / SPA / ISR), setting bundle budgets, choosing state management (local / server / global), Core Web Vitals tracking + INP debugging, accessibility floor enforcement, testing pyramid, and supply-chain security. Use when…
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
Go and Rust systems programming best practices for performance-critical, concurrent, and safe applications. Covers error handling, ownership/borrowing (Rust), context and goroutines (Go), testing patterns, and production deployment. Use when working with .go, .rs files, Cargo.toml, go.mod, or when asking about Go or…
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
Principal-level IAM and security architecture advisor for identity protocols, IGA, PKI, PAM, secrets delivery, delegated access, and non-human identity. Use for architecture decisions, protocol deep dives, design reviews, threat models, or mentoring involving OAuth, OIDC, SAML, SCIM, mTLS, certificates, workload…
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
Independent, read-only verification workflow for consequential AI-generated changes. Use when security, IAM, production infrastructure, destructive migrations, broad architecture, sensitive data, financial logic, or explicit assurance requirements need a verifier distinct from the implementing model or tool. Binds…
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
Infrastructure as Code best practices for Terraform, Docker, Ansible, and CloudFormation. Covers secure-by-default configurations, multi-stage builds, state management, and modular patterns. Use when working with .tf, Dockerfile, docker-compose.yml, .yaml/.yml Ansible files, CloudFormation templates, or when asking…
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
Kubernetes, Helm, and Argo CD best practices for container orchestration. Covers deployments, services, RBAC, resource management, Helm charts, GitOps synchronization, Podtrace runtime debugging, and production patterns. Use when working with Kubernetes manifests, Helm charts, Argo CD sync policies, kubectl commands…
d-padmanabhan/agent-engineering-handbook
Skill Claude CodeCodex
Model Context Protocol (MCP) server development and AI/ML integration patterns. Covers MCP server implementation, tool design, resource handling, and LLM integration best practices. Use when developing MCP servers, creating AI tools, integrating with LLMs, or when asking about MCP protocol, prompt engineering, or AI…
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