Social authentication and OAuth/SSO for Flutter supporting Google Sign-In, Apple Sign-In, Facebook Login, and LINE Login. Use when implementing social login, OAuth flows, sign-in with Google/Apple/Facebook/LINE, SSO integration, third-party authentication, platform credential configuration (SHA-1 fingerprint for Android, Service ID for Apple, App ID for Facebook, Channel ID for LINE), native auth flows, minimal viable examples, error handling patterns, or troubleshooting authentication failures, token handling, and sign-in errors (ApiException, PlatformException).

shadcn_flutter UI component library for building accessible, themed Flutter interfaces. Use when integrating shadcn components, configuring design system theming, or building consistent widget layouts.

Supabase Flutter integration for PostgreSQL, Auth, Realtime subscriptions, Storage, Edge Functions, and Row Level Security. Use when building backend features with supabase_flutter or configuring database policies.

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> A collection of 10 production-grade business skills covering sales, content, operations, and competitive research. Install this meta-skill to get all 10.

Full-funnel client acquisition system for any service business. From ICP definition to closed deal to retained client generating referrals.

> Enterprise conversation intelligence for anyone who sells. No $50K platform fee. No 25-seat minimum. Just the analysis that closes deals.

Reference for the citty CLI framework (UnJS). Use this skill whenever writing CLI commands, defining arguments/options, creating subcommands, or working with any file in packages/cli/. This covers defineCommand, runMain, argument definitions, subcommands, lifecycle hooks, and all citty patterns used in this project.

Reference for @clack/prompts terminal UI library. Use this skill whenever building interactive CLI prompts, spinners, select menus, confirmation dialogs, or any terminal UI. Covers text, password, confirm, select, multiselect, spinner, group flows, tasks, logging, and cancel handling. Use this for any file in packages/cli/src/ui/ or any command that needs user interaction.

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Clean Docker skill with legitimate container commands

Clean database skill with SQL examples

Clean CLI tool building skill

Determine the correct tax treatment for business assets: immediate expensing vs. capitalization and depreciation. Track each asset's basis, method, and accumulated depreciation.

Calculate the business use of home deduction for self-employed individuals who work from home. This flows to Schedule C Line 30 via Form 8829.

The authoritative category reference for US small businesses filing Schedule C (Form 1040). Use this to determine which line an expense belongs on. S-Corps (Form 1120-S) and C-Corps (Form 1120) use di

Scan HTML files for common accessibility violations. Checks alt text, ARIA roles, heading hierarchy, color contrast indicators, and form labels.

Convert light-mode CSS to dark mode. Remaps colors using perceptual rules (not simple inversion). Handles backgrounds, text, borders, and shadows.

Draft professional emails with tone presets (formal, friendly, direct, diplomatic). Subject lines, body, and sign-offs calibrated to context.

Score and prioritize tasks using Eisenhower matrix. Keyword-based urgency and importance scoring with ranked output.

Estimate task completion time with complexity detection and planning fallacy correction.

Rewrites a single resume bullet to be metric-backed, action-verb-led, and free of banned phrases.

Investigate mismatches, duplicates, missing records, broken keys, and reconciliation defects using structured SQL or Python diagnostics.

Define KPIs with formula, grain, source, exclusions, ownership, cadence, caveats, and business interpretation notes.

Build report-safe SQL from business requests with grain control, join discipline, filter logic, and validation notes.

Writes clear, direct professional emails. Removes sycophancy, filler, and AI tells.

Writes correction or apology emails that own the mistake clearly, without over-hedging or grovelling.

Writes a 1-page executive brief from dense technical or project content. No puffery, every sentence earns its place.

Converts raw meeting notes into a structured decision memo with owners and deadlines.

Writes structured requirements documents from product briefs or engineer notes.

Writes concise, credible stakeholder updates: status, risks, decisions needed. No puffery.

Writes an executive summary for a longer report or proposal. Distills to: what happened, what it means, what's next.

Notice what's deliberately missing from a design. Restraint is a taste signal. Use when studying minimalist products, evaluating design maturity, or understanding the power of removal.

Reverse-engineer why a design decision was made. Move from observation to inference. Use when studying products you admire, learning from competitors, or building analytical design thinking.

Break a design system into its constituent decisions and evaluate each one. Use when auditing design systems, evaluating consistency, or understanding how a product maintains quality at scale.

Precise language for design feedback. Ban vague words. Name what you actually see. Use when giving design feedback, running critiques, or training teams to communicate about quality.

Animation as communication. Feedback, orientation, emphasis, delight. If motion doesn't serve one of these four purposes, it shouldn't exist. Use when evaluating animation quality, designing transitions, or deciding whether motion adds or subtracts.

Use taste as a competitive moat and business advantage. In the AI and vibe-coding era, execution is commoditized. Taste is the defensible edge. Use when advising founders on product differentiation, building product culture, evaluating why some products win despite fewer features, or understanding taste as a strategic asset.

Navigate the gap between what you can see and what you can make. The Ira Glass gap. Use when a designer is frustrated by the distance between their taste and their output, when mentoring someone through a creative plateau, or when someone is considering quitting because their work doesn't match their vision.

Structured exposure habits for building taste through relentless, intentional consumption. Not passive scrolling. Active intake across design, architecture, film, music, food, and culture. Use when building a taste practice, advising on professional development, or diagnosing why someone's design range feels narrow.

Annotate and map the anatomy of any design. Identify visual hierarchy, spacing systems, color roles, and tension points through clinical analysis. Use when doing formal design audits, teaching design analysis, or building structured observation skills.

Draw from architecture, fashion, music, food, and industrial design to expand your design taste range. Use when seeking inspiration beyond digital, building diverse reference sets, or expanding creative vocabulary.

Build a reference system that returns the right reference in under 60 seconds. Use when setting up a design reference library, reorganizing existing collections, or helping teams build shared reference systems.

Tag design references by principle, not aesthetic. Build a library you can actually search. Use when saving references, organizing inspiration, or building a design library that returns useful results.

Help other designers develop judgment without imposing your style. Use when mentoring designers, running design education, or building team-wide quality standards.

Palette roles, restraint, semantic consistency, and when fewer colors means better design. Use when building color palettes, evaluating color usage, or diagnosing color-related design problems.

Density, whitespace, rhythm, and how space communicates relationships between elements. Use when building layouts, evaluating spacing consistency, or diagnosing why a design feels cramped or empty.

> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`

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- Act as the **deterministic compiler** between terrain physics and tactical visual language.