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Estruturas de julgamento e expressões idiomáticas essenciais para scripts Fish shell e automação. Aborda quando usar Fish vs bash, requisitos de compatibilidade macOS/Fedora e padrões específicos do Fish para prevenir bugs, como anti-padrões de variáveis universais, funções wrapper e guardas interativos.

Group sequential design methods for interim analyses, alpha spending, and futility stopping. Use when designing trials with interim looks or implementing spending functions.

Foundational knowledge for writing current PyMC models including syntax, distributions, sampling, and ArviZ diagnostics. Use when creating or reviewing PyMC models.

Scaffolds production-ready legal page templates for a website: Privacy Policy, Terms of Service, Cookie Policy, Cookie Consent banner, Refund Policy, Contact / Imprint. Templates are clearly marked as a starting point — the user must customize and have a lawyer review before going live.

Run a structured organizational design health check — operationalizing the governance learning loop and decision ledger by collecting operational evidence, measuring gate effectiveness, detecting genome drift, and producing an evolution audit with routed recommendations saved to $HOME/.ai-first-kit/. Maintains the decision ledger as an append-only record. Use when the user says 'audit my design',

When setting up telemetry, debugging distributed systems, or standardizing application output.

Interactive wizard to configure platform connections, API keys, and dependencies for media-agent. Detects available tools, walks through setup for each platform, tests connections, and writes config files. Run this before any other media-agent skill.

Fan-out parallel specialists for concurrent analysis. Dispatch read-only reviewers, researchers, and analyzers against a target.

Implements features using strict test-driven development — red-green-refactor cycle. Writes a failing test first, then minimal code to pass, then refactors. Use when building features that need high reliability.

Document system design decisions with mapped user flows, coupling analysis, failure modes, and explicit non-goals, proving the architecture can survive under unexpected conditions. Use when designing systems, evaluating structural changes, or reviewing architecture decisions. Proactively suggest when coupling analysis reveals circular dependencies, god objects, or hidden shared state.

Use when working with SAP Materials Management (MM) — procurement (procure-to-pay), material master, vendor/business partner master, source determination, inventory management, invoice verification, MRP, or any MM configuration in S/4HANA or ECC.

Write and save structured specifications that pass the Stranger Test — precise enough for someone with zero context to evaluate agent output. Produces spec files in $HOME/.ai-first-kit/ at task, workflow, or governance layers, aligned with the organizational genome. Use when the user says 'write a spec', 'specify this task', 'define success criteria', 'what should agents know to do this', 'create