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Battle-tested prompts from a prompt engineering expert

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A curated, searchable library of the best prompts, vibe coding templates, Claude Skills, image generation and bot templates, all in one place.

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3,404 prompts

Claude Skills

FDA Consultant Specialist

FDA regulatory consultant for medical device companies. Provides 510(k)/PMA/De Novo pathway guidance, QMSR (21 CFR 820, which incorporates ISO 13485:2016 by reference since 2026-02-02; formerly QSR) compliance, HIPAA assessments, and device cybersecurity.

FDA regulatory consulting for medical device manufacturers covering submission pathways, the Quality Management System Regulation (QMSR, 21 CFR Part 820 —…
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#compliance#claude skill
Claude Skills

FDA QSR Audit Prep

/cs:fda-qsr-audit-prep — FDA QSR Forcing Questions skill. /cs:fda-qsr-audit-prep <scope> — FDA 21 CFR 820 (QSR / QMSR) audit 6-question forcing interrogation. Post-Feb 2026 substantially harmonized with ISO 13485.

Command: /cs:fda-qsr-audit-prep <scope The FDA QSR auditor pressure-tests any US medical-device QSR work. Six questions before any internal audit, FDA…
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#compliance#claude skill
Claude Skills

Feature Flags Architect

Feature Flags Architect skill. Use when adding, retiring, or auditing feature flags. Triggers on "add a flag", "ship behind a flag", "rollout plan", "kill switch", "stale flags", "flag debt", "LaunchDarkly", "GrowthBook", "Statsig", "Unleash", "Flipt", or any progressive-delivery question.

End-to-end discipline for feature flags: classify them, ship them, ramp them, and retire them. Most teams treat flags as throwaway if-statements; this skill…
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#engineering#claude skill
Claude Skills

Financial Analyst Skill

Performs financial ratio analysis, DCF valuation, budget variance analysis, and rolling forecast construction for strategic decision-making. Use when analyzing financial statements, building valuation models, assessing budget variances, or constructing financial projections and forecasts.

Production-ready financial analysis toolkit providing ratio analysis, DCF valuation, budget variance analysis, and rolling forecast construction. Designed…
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#finance#claude skill
Claude Skills

Finishing a Development Branch

Finishing a Development Branch skill. Use when implementation is complete, all tests pass, and you need to decide how to integrate the work

Core principle: Verify tests → Detect environment → Present options → Execute choice → Clean up. Announce at start: "I'm using the…
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#engineering#claude skill
Claude Skills

Fix Failing or Flaky Tests

Fix Failing or Flaky Tests skill. - Fix failing or flaky Playwright tests. Use when user says "fix test", "flaky test", "test failing", "debug test", "test broken", "test passes sometimes", or "intermittent failure".

Diagnose and fix a Playwright test that fails or passes intermittently using a systematic taxonomy.
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#engineering#claude skill
Claude Skills

Focused Feature Repair

Focused Fix — Deep-Dive Feature Repair skill. Use when the user asks to fix, debug, or make a specific feature/module/area work end-to-end. Triggers: 'make X work', 'fix the Y feature', 'the Z module is broken', 'focus on [area]'.

If you haven't finished Phase 3, you cannot propose fixes. Period. Violating the letter of these phases is violating the spirit of focused repair.
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#engineering#claude skill
Claude Skills

Form CRO

Form CRO skill. When the user wants to optimize any form that is NOT signup/registration — including lead capture forms, contact forms, demo request forms, application forms, survey forms, or checkout forms.

You are an expert in form optimization. Your goal is to maximize form completion rates while capturing the data that matters. The thresholds that drive…
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#marketing#claude skill
Claude Skills

Founder Development Coach

Personal leadership development for founders and first-time CEOs. Covers founder archetype identification, delegation frameworks, energy management, CEO calendar audits, leadership style evolution, blind spot identification, imposter syndrome, founder mental health, and succession planning.

Your company can only grow as fast as you do. This skill treats founder development as a strategic priority — not a personal indulgence.
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#leadership#claude skill
Claude Skills

Founder Office Hours Questions

/cs:office-hours — Six-Question Founder Interrogation skill. /cs:office-hours <topic> — YC-style 6-question founder interrogation before any advice. Forces clarity on problem, customer, distribution, defensibility, capital, and founder fit.

Command: /cs:office-hours <topic Before any advice, the founder must answer six questions. Modeled on YC office hours: no analysis until the founder has…
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#leadership#claude skill
Claude Skills

Founder Onboarding Interview

/cs:onboard — Founder Interview skill. /cs:onboard — Founder interview that populates ~/.claude/company-context.md using the canonical 7-dimension cs-onboard schema. The first command to run when starting with c-level-agents.

Command: /cs:onboard The first command to run when adopting c-level-agents. A structured founder interview that produces ~/.claude/company-context.md — the…
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#leadership#claude skill
Claude Skills

Founder Question Router

/cs:founder-mode — The Auto-Router skill. /cs:founder-mode <question> — Auto-routes any founder question to the right C-role advisor or to /cs:boardroom for multi-role topics. The single-command entry point.

Command: /cs:founder-mode <question The single command a founder needs to remember. Routes the question to the right C-role automatically, or triggers…
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#leadership#claude skill
Claude Skills

Free Tool Strategy

Free Tool Strategy skill. When the user wants to build a free tool for marketing — lead generation, SEO value, or brand awareness.

You are a growth engineer who has built and launched free tools that generated hundreds of thousands of visitors, thousands of leads, and hundreds of…
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#marketing#claude skill
Claude Skills

Full Page Screenshot

Full Page Screenshot skill. Use when the user asks to capture a full-page screenshot, long screenshot, or complete page capture of a web page. Handles SPA scroll containers, lazy-loaded images, and very tall pages via Chrome DevTools Protocol with zero external dependencies.

Capture a full-page screenshot of any web page via Chrome DevTools Protocol. Produces a single PNG that includes all content — even portions that require…
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#engineering#claude skill
Claude Skills

Full Plan Review Pipeline

Auto-review pipeline — reads the full CEO, design, eng, and DX review skills from disk and runs them sequentially with auto-decisions using 6 decision principles. Surfaces taste decisions (close approaches, borderline scope, outside-review disagreements) at a final approval gate.

Auto-review pipeline — reads the full CEO, design, eng, and DX review skills from disk and runs them sequentially with auto-decisions using 6 decision…
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#engineering#claude skill
Claude Skills

Full Safety Mode

Full safety mode: destructive command warnings + directory-scoped edits. Combines /careful (warns before rm -rf, DROP TABLE, force-push, etc.) with /freeze (blocks edits outside a specified directory).

Activates both destructive command warnings and directory-scoped edit restrictions. This is the combination of /careful + /freeze in a single command.…
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#safety#claude skill
Claude Skills

GCP Cloud Architect

Design GCP architectures for startups and enterprises. Use when asked to design Google Cloud infrastructure, deploy to GKE or Cloud Run, configure BigQuery pipelines, optimize GCP costs, or migrate to GCP.

Design scalable, cost-effective Google Cloud architectures for startups and enterprises with infrastructure-as-code templates. ---
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#engineering#claude skill
Claude Skills

GDPR Audit Prep

/cs:gdpr-audit-prep — GDPR DPO Forcing Questions skill. /cs:gdpr-audit-prep <scope> — GDPR audit 6-question Article-cited forcing interrogation. Use before annual internal GDPR review, post-breach internal audit, DPA investigation readiness, or acquisition due diligence.

Command: /cs:gdpr-audit-prep <scope The GDPR DPO auditor pressure-tests any privacy compliance work. Six Article-cited questions before any internal audit,…
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#compliance#claude skill
Claude Skills

GDPR Compliance Expert

GDPR and German DSGVO compliance automation. Scans codebases for privacy risks, generates DPIA documentation, tracks data subject rights requests with Art. 12(3) one-month deadlines.

Tools and guidance for EU General Data Protection Regulation (GDPR) and German Bundesdatenschutzgesetz (BDSG) compliance. ---
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#compliance#claude skill
Claude Skills

General Counsel Advisor

General Counsel advisory for startups: contract review (MSA, SaaS, NDA, DPA, employment), IP strategy, term sheet decoding, and regulatory landscape mapping.

Strategic legal frameworks for startup General Counsels and founders without one. Contract risk, IP strategy, term sheet decoding, regulatory landscape.…
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#leadership#claude skill
Claude Skills

General Counsel Plan Review

/cs:gc-review — General Counsel Forcing Questions skill. /cs:gc-review <plan> — General Counsel interrogation of contracts, IP, regulatory, term sheets, and employment-law surface. Use when reviewing a term sheet before signing, redlining a customer MSA, or checking IP assignment and regulatory exposure on a new product.

Command: /cs:gc-review <plan The General Counsel lens. Six questions before any contract, term sheet, IP move, or regulatory commitment. This is a lane…
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#leadership#claude skill
Claude Skills

Generate Playwright Tests

Generate Playwright Tests skill. - Generate Playwright tests. Use when user says "write tests", "generate tests", "add tests for", "test this component", "e2e test", "create test for", "test this page", or "test this feature".

Generate production-ready Playwright tests from a user story, URL, component name, or feature description.
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#engineering#claude skill
Claude Skills

Git Worktree Manager

Run parallel feature work safely with Git worktrees. Standardizes branch isolation, port allocation, environment sync, and cleanup so each worktree behaves like an independent local app.

Tier: POWERFUL Category: Engineering Domain: Parallel Development & Branch Isolation Use this skill to run parallel feature work safely with Git worktrees.…
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#engineering#claude skill
Claude Skills

Grill with Docs

Docs-anchored grilling session — challenges a plan against the project's existing language (CONTEXT.md) and recorded decisions (docs/adr/), and updates those files inline as terminology and decisions crystallise.

Docs-anchored grilling session — challenges a plan against the project's existing language (CONTEXT.md) and recorded decisions (docs/adr/), and updates those files inline as terminology and decisions crystallise.
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#engineering#claude skill
Samuel

Samuel

On Twitter / X

  • @PromptLLM – 97,000 followers
  • @ProperlyAds – 5,700 followers

I am the owner and founder of both Properly Ads, a digital marketing agency specialising in paid ads, and PromptLLM, one of the biggest X accounts in the AI space. I have used AI extensively over the last few years to grow my digital marketing agency to five figures a month and to drive my own personal growth. I am now on a mission to give people the tools to get the highest possible output from AI and to transform every area of their lives.

Have a question? Email me at sam@promptllm.co

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