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Found 3,126 Skills
Midnight transaction lifecycle — proof-based unsigned ledger transactions, transaction pool validation, runtime proof verification, ZSwap and contract operations, and on-chain state commits. Use when explaining how txs differ from standard Substrate signed extrinsics.
Debug Scikit-learn issues systematically. Use when encountering model errors like NotFittedError, shape mismatches between train and test data, NaN/infinity value errors, pipeline configuration issues, convergence warnings from optimizers, cross-validation failures due to class imbalance, data leakage causing suspiciously high scores, or preprocessing errors with ColumnTransformer and feature alignment.
Multi-layer validation pattern - validates data at EVERY layer it passes through to make bugs structurally impossible, not just caught.
Use when designing Rails models - ActiveRecord patterns, validations, callbacks, scopes, associations, concerns, query objects, form objects
Caching strategies for .NET 10 applications. Covers HybridCache (the default), output caching, response caching, and distributed cache patterns. Load this skill when implementing caching, optimizing read performance, reducing database load, or when the user mentions "cache", "HybridCache", "Redis", "output cache", "response cache", "distributed cache", "IMemoryCache", "cache invalidation", "stampede protection", or "cache-aside".
Analyze survey results into actionable PM insights. Produces persona segmentation, hypothesis validation status, thematic clustering of open-text responses, statistical confidence labels, prioritized recommendations, and what-NOT-to-conclude warnings. Refuses to overstate statistical significance from weak samples or biased instruments.
Diagnose and correct a known defect, including a root-cause change and regression validation. Use when the user reports existing behavior that violates an expected contract. Do not use merely to undo or revise Codex's changes from the current task in response to feedback; continue the active task instead. Use kf-investigate-issue when the request is only to understand an unclear symptom or cause.
Use when designing, critiquing, or implementing forms, inputs, validation, checkout, registration, payment, or any data-entry flow.
Use when drafting, editing, reviewing, or benchmarking prose to remove AI-writing tells while preserving meaning, voice, and density. Trigger this skill for requests about AI slop, humanizing AI-assisted writing, detector-facing validation, unsummarizable prose, voice preservation, or writing that should not sound generic.
Core guide to the Yandex KIT e-commerce API (kit.yandex.ru store builder): authentication, base URL, rate limits, error contract, pagination and offline spec search/validation scripts. Use when a task involves the Yandex KIT API and no domain skill (catalog, orders, promotions, store, webhooks) clearly fits, or when you need auth, limits or error-handling basics.
Runs a fast pre-build risk review on a product idea, feature request, or scope change, naming the single assumption most likely to make it fail and returning a clear verdict (build small, validate first, pivot first, or don't build yet) with a no-code validation step. Use before committing build effort, when triaging whether to honor a feature request, or when deciding whether to expand scope, ahead of writing a PRD. For a launched product's pivot-or-persevere decision, use iterate-pivot-decision instead.
Rapid-prototyping mentor for Unity game development driven through the Unity MCP. Teaches how to DECIDE before coding — core-loop value, <1h feasibility, 10x-simpler version, asset-over-custom, odds of finishing the game. Mandate: gameplay validation first, fast iteration, minimal architecture. Trigger: when planning, proposing, or implementing any gameplay feature, mechanic, or system in a Unity game jam or prototype (also: "prototipado", "game jam", "core loop", "que el juego sea divertido").