PostgreSQL patterns for Python with psycopg 3 and asyncpg -- connection pooling, parameterized queries, transactions, bulk inserts, async context managers, server-side cursors, SSL config, and connection cleanup. Always apply when building or reviewing Python apps with PostgreSQL using raw database drivers (not an ORM), or when debugging connection pool or query issues.

Write correct Django tests that avoid common pitfalls. Covers TestCase vs TransactionTestCase, setUp vs setUpTestData, factory-boy patterns, assertNumQueries, mock.patch placement, override_settings, file upload testing, management command testing, and DRF APITestCase. Use when writing or reviewing Django test suites.

Security essentials for Django — CSRF, CORS, security middleware, ALLOWED_HOSTS, secrets management, and common misconfigurations. Use when building or reviewing Django apps before production deployment, or when a security audit flags issues.

Svelte 5 runes, SvelteKit patterns, component design, reactivity, and data loading. Use when building or reviewing Svelte/SvelteKit apps, especially with Svelte 5 runes ($state, $derived, $effect, $props), snippets, event handling, SvelteKit load functions, and form actions.

Jest testing patterns — test structure, mocking, async testing, snapshot testing, and configuration. Use when building or reviewing tests with Jest, when setting up Jest for a project, or when debugging flaky Jest tests.

Use and maintain the graphthulhu knowledge graph MCP to store investigations, architectural decisions, plans, and session context in a persistent Obsidian-backed vault; triggers automatically at session start, after analysis or investigations, when recording decisions, and when the user corrects stored knowledge; use when asked to remember this, save for later, take notes, persist findings, track decisions, log results, maintain context between sessions, or store knowledge.

Query Google Analytics 4 (GA4) data via the Analytics Data API. Use when you need to pull website analytics like top pages, traffic sources, user counts, sessions, conversions, or any GA4 metrics/dimensions. Supports custom date ranges and filtering.

Comprehensive TypeScript guidance covering compiler configuration, advanced types, utility types, type guards, strict mode workflows, and documentation patterns; use when configuring tsconfig, designing complex generics, making illegal states unrepresentable, fixing type errors, or writing testable and maintainable type-safe APIs.

Configure and operate Mise for deterministic developer environments. Use when installing runtime/tool versions, defining reusable tasks, managing layered environment variables, migrating from asdf/nvm/pyenv, or debugging mise.toml behavior in CI and local shells. Keywords: mise, mise.toml, tool versions, tasks, env, asdf migration, setup automation, dev environment.

Categorize requirements into Must/Should/Could/Won't tiers, generate priority matrices, and facilitate trade-off discussions using the MoSCoW framework in a deterministic way. Use when teams need to define MVP scope, sequence releases, resolve stakeholder conflicts, prevent scope creep, or rebalance backlog under time, budget, or staffing constraints. Keywords: moscow, must should could wont, requirement prioritization, backlog, mvp, release planning, scope control, stakeholder alignment.

Complete Commander.js CLI framework guidance covering command structure, options, arguments, subcommands, action handlers, version management, and TypeScript integration. Use when: building CLI tools, parsing command-line arguments, implementing subcommands, handling options/flags, creating interactive CLIs, or migrating from other CLI frameworks. Keywords: Commander.js, CLI, command-line, arguments, options, flags, subcommands, action handlers, version, help text, TypeScript, yargs, meow, program, parseAsync, opts, args, variadic, required options, default values, custom help, error handling

Build authoritative real-time multiplayer servers with Colyseus 0.17+. Use when implementing rooms, schema state sync, client message validation, matchmaking, authentication, reconnection handling, or server-side anti-cheat constraints. Keywords: colyseus, room lifecycle, schema, multiplayer, websocket, matchmaking, onJoin, onLeave, onDrop, allowReconnection.

Framework for AI agent evaluation in containerized environments. Use when: (1) Running agent evaluations with `harbor run` against benchmarks (SWE-Bench, Terminal-Bench, Aider Polyglot, etc.), (2) Creating custom benchmark tasks with Dockerfile, instruction.md, solution, and tests, (3) Building adapters to convert existing benchmarks to Harbor format, (4) Implementing custom agents extending BaseAgent or BaseInstalledAgent, (5) Scaling evaluations to cloud providers (Daytona, Modal, E2B), (6) Exporting traces for RL/SFT training, (7) Debugging Harbor runs or inspecting package internals.

NestJS patterns -- modules, controllers, services, dependency injection, exception filters, validation pipes, guards, interceptors, custom providers, testing, and configuration. Use when building or reviewing NestJS APIs, setting up a new NestJS project, or migrating from Express to NestJS.