Playwright E2E testing patterns, cross-browser configuration, page objects, and CI setup. Use when creating E2E specs, visual regression suites, or configuring Playwright in CI. Trigger terms: playwright, e2e, trace, page object, cross-browser

Resend transactional email patterns, React Email templates, domain configuration, and webhook handling. Use when sending emails, building email templates, or configuring email delivery.

Prisma ORM schema design, migrations, client generation, and query patterns. Use when designing database schemas, writing migrations, querying data, or managing Prisma Client.

Deploy sites, configure serverless and edge functions, and verify builds on Netlify. Use when the user mentions: 'deploy preview', 'configure netlify.toml', or 'debug a failed deploy'. Trigger terms: build error, Netlify Functions, deploy logs, deploy preview

Figma design-to-code workflows, design token extraction, component inspection, and asset export. Use when translating Figma designs into code, extracting design tokens, or referencing component specs.

Levers for writing documents an agent consumes: context pointers, the two loads, information hierarchy, progressive disclosure, completion criteria, leading words, and pruning. Use when creating or editing a skill, an agent definition, an instruction file, AGENTS.md, or CLAUDE.md.

Removes AI tells from prose: puffery, AI vocabulary, em dashes, inline-header lists, hedging, filler, and abstract metaphor nouns. Use when writing or editing any prose a human reads, including README files, docs, PR descriptions, commit messages, changelogs, release notes, and marketing copy.

Type-level discipline for TypeScript: discriminated unions, branded types, constructive modeling, narrowing hierarchy, exhaustiveness checks, boundary validation. Use when reading or editing any .ts or .tsx file, modelling domain types, or refactoring an `as` cast out of existing code.

Generates test plans, writes unit/integration/E2E test files, identifies coverage gaps, flags common testing anti-patterns. Use when writing tests, creating test suites, planning test strategies, mocking dependencies, measuring code coverage, or test planning.

Four-layer standard for technical prose: Diataxis document modes, Google developer style sentences, Simplified Technical English instruction rules, Global English disambiguation. Use when writing or reviewing docs, RFCs, README files, PR descriptions, or commit messages.

Provides model routing rules, validates delegation prerequisites, supplies cost tracking templates, defines dead-letter queue formats for Team Lead orchestration. Load when assigning tasks to agents, choosing model tiers, starting delegation session, running multi-agent workflow, delegating work, choosing which model to use, or assigning tasks.

Saves, restores session state including task progress, file changes, delegation history. Use when saving progress, resuming interrupted work, picking up where you left off, or checkpointing current work.

Appends new entries to LESSONS-LEARNED.md via opencastle lesson CLI; searches past lessons for matching errors; proposes skill updates when retry patterns exceed thresholds. Use when consulting or updating LESSONS-LEARNED.md, after task failures, when capturing retrospective insights, or when a retry succeeds.

Coordinate multiple agents: parallel spawning, health monitoring, circuit breakers, escalation. Use for parallel agents, agent timeouts, fan-out tasks, multi-agent delegation.

Defines named visual aesthetic, selects typography pairings, builds CSS token systems, adds entrance animations for high-design-quality pages. Use when user asks to design landing page, style marketing site, create distinctive UI theme, pick fonts, or add CSS animations — specifically when visual polish, brand identity matter rather than generic component scaffolding.

Mandatory post-delegation gate: checks output completeness, verifies acceptance criteria compliance, flags regressions, produces PASS/FAIL verdict. Use when checking delegated work against acceptance criteria, running post-delegation gate, validating agent output before acceptance, verifying sub-agent completed its assignment, or running post-delegation QA check.

Four lifecycle hooks every agent runs: on-session-start scans LESSONS-LEARNED.md, resumes checkpoints; on-pre-delegate verifies tracker issues, file partitions; on-post-delegate runs fast-review, CI checks; on-session-end runs the health checks, writes logs. Use when starting a new session, running pre-flight checks before delegation, coordinating between agents, reviewing a completed handoff, or wrapping up a session. Trigger terms: multi-agent setup, delegate tasks, agent coordination, session management, run pre-flight checks, start a new session, coordinate between agents, wrap up session

Maps file dependencies, flags shared imports, groups files for safe parallel editing before code changes. Use when planning a refactoring, analyzing change impact, or understanding which files a modification will affect.

Stripe payment integration patterns, Checkout Sessions, billing/subscriptions, Connect platforms, and API best practices. Use when building, modifying, or reviewing any Stripe integration — including accepting payments, building marketplaces, setting up subscriptions, or implementing secure key handling.

Sentry error monitoring, SDK initialization, performance tracing, source maps, session replay, and release tracking. Use when adding Sentry to a project, capturing errors with context, setting up distributed tracing, configuring source maps, or debugging production issues.