mdt

How to use the Serena MCP server for token-efficient code navigation, symbol analysis, and targeted editing. Use this skill whenever Serena tools are available (mcp__serena__* tools appear in your tool list), when exploring unfamiliar codebases, before editing any file larger than ~100 lines, when finding all callers of a function, or when you need to understand a module without reading it whole. ALWAYS prefer Serena's symbolic tools over raw Read calls for TypeScript, JavaScript, Python, or any language with LSP support — it is almost always faster and cheaper.

Use context-mode tools (ctx_execute, ctx_execute_file) instead of Bash/cat when processing large outputs. Triggers: "analyze logs", "summarize output", "process data", "parse JSON", "filter results", "extract errors", "check build output", "analyze dependencies", "process API response", "large file analysis", "page snapshot", "browser snapshot", "DOM structure", "inspect page", "accessibility tree", "Playwright snapshot", "run tests", "test output", "coverage report", "git log", "recent commits", "diff between branches", "list containers", "pod status", "disk usage", "fetch docs", "API reference", "index documentation", "call API", "check response", "query results", "find TODOs", "count lines", "codebase statistics", "security audit", "outdated packages", "dependency tree", "cloud resources", "CI/CD output". Also triggers on ANY MCP tool output that may exceed 20 lines.

Instinct-based learning system for Codex. Manual-first: explicit capture and analysis baseline, with optional background observer.

Keep repository documentation current, accurate, well-placed, and easy to follow for both humans and LLMs. Use when auditing doc drift, correcting stale claims, deciding where docs belong, or validating documentation quality before a commit.

Instinct-based learning system that adapts to the environment: hooks-passive observation for Claude/Cursor, explicit capture for hook-free tools. Single unified surface for all tools.

Keep repository documentation current, accurate, well-placed, and easy to follow for both humans and LLMs. Use when auditing doc drift, correcting stale claims, deciding where docs belong, or validating documentation quality before a commit.

Create stunning, animation-rich HTML presentations from scratch or by converting PowerPoint files. Use when the user wants to build a presentation, convert a PPT/PPTX to web, or create slides for a talk/pitch. Helps non-designers discover their aesthetic through visual exploration rather than abstract choices.

Suggests manual context compaction at logical intervals to preserve context through task phases rather than arbitrary auto-compaction.

Run a quick MDT Codex dev smoke check from an installed dev setup using the shipped global smoke scripts.

Verify MDT's shipped Codex setup against the local workflow contract. Use when auditing Codex support, checking whether installed setup files still exist, validating Codex workflow coverage, or producing a readiness report without relying on CI or live model calls.

Verify MDT's shipped Claude, Cursor, and Codex setups against the local workflow contract. Use when auditing tool support, checking whether setup files still exist, validating workflow coverage, or producing a per-tool readiness report without relying on GitHub Actions or live model calls.

Scan your tool configuration for security vulnerabilities, misconfigurations, and injection risks using AgentShield. Checks instruction files, settings, MCP servers, hooks, and agent definitions.

Use when auditing installed skills and commands for quality. Supports Quick Scan (changed skills only) and Full Stocktake modes with sequential subagent batch evaluation.

Pattern for progressively refining context retrieval to solve the subagent context problem

REST API design patterns including resource naming, status codes, pagination, filtering, error responses, versioning, and rate limiting for production APIs.

Backend architecture patterns, API design, database optimization, and server-side best practices for Node.js, Express, and Next.js API routes.

Safe, portable, and idiomatic Bash/shell scripting patterns including error handling, security hardening, argument parsing, testing with bats-core, and cross-platform techniques.

Universal coding standards, best practices, and patterns for TypeScript, JavaScript, React, and Node.js development.

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).

Idiomatic C# and VB.NET patterns, best practices, and conventions for .NET Framework 4.8 and modern .NET (5/6/7/8+). Covers async/await, LINQ, EF Core, DI, records, and enterprise patterns.

Playwright E2E testing patterns, Page Object Model, configuration, CI/CD integration, artifact management, and flaky test strategies.

Formal evaluation framework for Codex sessions implementing eval-driven development (EDD) principles

Frontend development patterns for React, Next.js, state management, performance optimization, and UI best practices.

Create stunning, animation-rich HTML presentations from scratch or by converting PowerPoint files. Use when the user wants to build a presentation, convert a PPT/PPTX to web, or create slides for a talk/pitch. Helps non-designers discover their aesthetic through visual exploration rather than abstract choices.

PostgreSQL database patterns for query optimization, schema design, indexing, and security. Based on Supabase best practices.

PowerShell best practices, idiomatic patterns, module design, error handling, security hardening, and cross-platform scripting for modern PowerShell 5.1 and PowerShell 7+.

Pythonic idioms, PEP 8 standards, type hints, and best practices for building robust, efficient, and maintainable Python applications.

Python testing strategies using pytest, TDD methodology, fixtures, mocking, parametrization, and coverage requirements.

Use this skill when adding authentication, handling user input, working with secrets, creating API endpoints, or implementing payment/sensitive features. Provides comprehensive security checklist and patterns.

T-SQL and SQL Server best practices, query optimization, stored procedures, indexing strategies, security, and administration patterns for SQL Server 2016+ and Azure SQL Database.

Suggests manual context compaction at logical intervals to preserve context through task phases rather than arbitrary auto-compaction.

Use this skill when writing new features, fixing bugs, or refactoring code. Enforces test-driven development with 80%+ coverage including unit, integration, and E2E tests.

A comprehensive verification system for Codex sessions.

REST API design patterns including resource naming, status codes, pagination, filtering, error responses, versioning, and rate limiting for production APIs.

Patterns and architectures for autonomous MDT loops — from simple sequential pipelines to RFC-driven multi-agent DAG systems.

Backend architecture patterns, API design, database optimization, and server-side best practices for Node.js, Express, and Next.js API routes.

Safe, portable, and idiomatic Bash/shell scripting patterns including error handling, security hardening, argument parsing, testing with bats-core, and cross-platform techniques.

Universal coding standards, best practices, and patterns for TypeScript, JavaScript, React, and Node.js development.

Cache expensive file processing results using SHA-256 content hashes — path-independent, auto-invalidating, with service layer separation.

Cost optimization patterns for LLM API usage — model routing by task complexity, budget tracking, retry logic, and prompt caching.