Coding & Dev Tools

Record polished UI demo videos using Playwright. Use when the user asks to create a demo, walkthrough, screen recording, or tutorial video of a web application. Produces WebM videos with visible cursor, natural pacing, and professional feel.

Systematic debugging with root cause investigation. (gstack)

YC Office Hours — two modes. (gstack)

Multi-platform content distribution across X, LinkedIn, Threads, and Bluesky. Adapts content per platform using content-engine patterns. Never posts identical content cross-platform. Use when the user wants to distribute content across social platforms.

Guide users through ECC's current agents, skills, commands, hooks, rules, install profiles, and project onboarding by reading the live repository surface before answering.

Design shotgun: generate multiple AI design variants, open a comparison board, collect structured feedback, and iterate. (gstack)

Build a source-derived writing style profile from real posts, essays, launch notes, docs, or site copy, then reuse that profile across content, outreach, and social workflows. Use when the user wants voice consistency without generic AI writing tropes.

Bun as runtime, package manager, bundler, and test runner. When to choose Bun vs Node, migration notes, and Vercel support.

Use only when writing/updating/fixing C++ tests, configuring GoogleTest/CTest, diagnosing failing or flaky tests, or adding coverage/sanitizers.

Build reusable Manim explainers for technical concepts, graphs, system diagrams, and product walkthroughs, then hand off to the wider ECC video stack if needed. Use when the user wants a clean animated explainer rather than a generic talking-head script.

CEO/founder-mode plan review. (gstack)

Eng manager-mode plan review. (gstack)

JPA/Hibernate patterns for entity design, relationships, query optimization, transactions, auditing, indexing, pagination, and pooling in Spring Boot.

Perl testing patterns using Test2::V0, Test::More, prove runner, mocking, coverage with Devel::Cover, and TDD methodology.

Use this skill to validate the "why" before building, run product diagnostics, and pressure-test product direction before the request becomes an implementation contract.

CQO quality and operational governance lead. Owns gates, regression strategy, memory hygiene, port/service policy, and archive approval.

HR hiring. Searches .harness/shared/HR-Resource candidates, installs selected worker skills into .claude and .codex, and records roster wiring.

Build and maintain a browser-based office dashboard that visualizes .harness runtime state including missions, CXX status, hired workers, events, archive state, and ops exceptions.

Resource manager. Maintains hired-worker wording, aliases, keyword mapping, and hire recommendations.

Expert site reliability engineer specializing in SLOs, error budgets, observability, chaos engineering, and toil reduction for production systems at scale.

Expert Financial Planning & Analysis (FP&A) analyst specializing in budgeting, variance analysis, financial planning, rolling forecasts, and strategic decision support. Bridges the gap between the numbers and the business narrative to drive operational performance and strategic resource allocation.

Friendly, professional customer service specialist for any industry — handling inquiries, complaints, account support, FAQs, and seamless escalation with warmth, efficiency, and a genuine commitment to customer satisfaction

Expert tax strategist specializing in tax optimization, multi-jurisdictional compliance, transfer pricing, and strategic tax planning. Navigates complex tax codes to minimize liability while ensuring full regulatory compliance across local, state, federal, and international tax regimes.

Systems and mechanics architect - Masters GDD authorship, player psychology, economy balancing, and gameplay loop design across all engines and genres

Language Server Protocol specialist building unified code intelligence systems through LSP client orchestration and semantic indexing

Expert technology assessment specialist focused on evaluating, testing, and recommending tools, software, and platforms for business use and productivity optimization

Expert in narrative theory, story structure, character arcs, and literary analysis — grounds advice in established frameworks from Propp to Campbell to modern narratology

Real-time Spanish ↔ English translation specialist with cultural context, regional dialect awareness, travel phrase guidance, and tone-appropriate communication for everyday, business, and emergency situations

Stops fantasy approvals, evidence-based certification - Default to "NEEDS WORK", requires overwhelming proof for production readiness

Expert in cultural systems, rituals, kinship, belief systems, and ethnographic method — builds culturally coherent societies that feel lived-in rather than invented

Expert visual communication specialist focused on creating compelling visual narratives, multimedia content, and brand storytelling through design. Specializes in transforming complex information into engaging visual stories that connect with audiences and drive emotional engagement.

Full-spectrum study abroad planning expert covering the US, UK, Canada, Australia, Europe, Hong Kong, and Singapore — proficient in undergraduate, master's, and PhD application strategy, school selection, essay coaching, profile enhancement, standardized test planning, visa preparation, and overseas life adaptation, helping Chinese students craft personalized end-to-end study abroad plans.

Expert financial analyst specializing in financial modeling, forecasting, scenario analysis, and data-driven decision support. Transforms raw financial data into actionable business intelligence that drives strategic planning, investment decisions, and operational optimization.

Expert customer support specialist delivering exceptional customer service, issue resolution, and user experience optimization. Specializes in multi-channel support, proactive customer care, and turning support interactions into positive brand experiences.

Expert recruitment operations and talent acquisition specialist — skilled in China's major hiring platforms, talent assessment frameworks, and labor law compliance. Helps companies efficiently attract, screen, and retain top talent while building a competitive employer brand.

Expert in collecting, analyzing, and synthesizing user feedback from multiple channels to extract actionable product insights. Transforms qualitative feedback into quantitative priorities and strategic recommendations.