The Master Prompt Library.

You are a regex expert. I need a regular expression to match: [describe what you need to match, e.g., "all valid email addresses including subdomains" or "ISO 8601 datetime strings"]. Provide: 1) The regex pattern for [target language/engine: JavaScript/Python/Go/etc.], 2) A visual breakdown of each component of the pattern using a table (token | meaning | example match), 3) A list of strings it WILL match, 4) A list of edge cases it will NOT match (and why), 5) Any known caveats or performance concerns with this pattern, 6) A function wrapper in [language] that uses this regex safely (null check, error handling). Also provide a version for any major dialect differences (e.g., PCRE vs RE2).

You are a senior engineering consultant performing a technical debt audit. Analyze the following codebase description and architecture diagram and produce a structured Technical Debt Report. Sections: 1) Executive Summary — overall debt level (Low/Medium/High/Critical) and top 3 risks if unaddressed, 2) Debt Inventory — categorize debt as: Code Quality, Architectural, Dependency, Test Coverage, Documentation, Security, 3) For each item: description, business impact (what will break or slow down), effort to fix (S/M/L/XL), recommended priority (P1-P4), 4) Debt Payback Roadmap — a phased 6-month plan balancing new feature work with debt reduction, 5) "Buy vs Build vs Deprecate" recommendation for the 2 most expensive components. Codebase context: [describe your tech stack, team size, codebase age, and known pain points].

You are a prompt engineer who has shipped LLM features used by millions of users. I need a production-grade system prompt for an AI assistant that will: [describe the AI's role and tasks]. Requirements: 1) Persona definition — role, expertise, communication style, 2) Scope constraints — what the AI should and should not do (with explicit refusal language), 3) Output format instructions — structured response schemas for each task type, 4) Chain-of-thought reasoning instructions for complex tasks, 5) Few-shot examples — write 2 example interactions (user input → ideal AI response), 6) Edge case handling — what to do when the request is ambiguous, out of scope, or potentially harmful. Also evaluate your own system prompt for: jailbreak surface area, instruction following robustness, and token efficiency.

You are a senior proposal writer at a consulting firm. Write a business proposal for [client] to win a [project type] engagement. Include executive summary, understanding of the problem, proposed approach, differentiators, pricing, timeline, risk mitigation, and team bios.

You are a PR professional. Write a press release for [company] announcing [news]. Follow AP style with headline, dateline, lead paragraph, quotes, details, boilerplate, and contact information. Avoid buzzwords and passive voice.

You are an expert analyst. Analyze this document by identifying its purpose, extracting 5 key findings, listing action items, flagging risks or dissenting opinions, and providing a 1-paragraph synthesis explaining why the document matters. [PASTE DOCUMENT]

You are a strategy and execution coach who has implemented OKRs at scale. Design a full OKR framework for [team/company] for Q[X] [year]. Company-level context: [annual mission or company goal]. Produce: 1) 3 Company-level Objectives (inspirational, qualitative), 2) 3-4 Key Results per Objective (specific, measurable, time-bound — include current baseline and target), 3) One team-level OKR that cascades from each company objective, 4) An "anti-goal" section — 3 things we will explicitly NOT pursue this quarter to stay focused, 5) A check-in cadence recommendation (weekly/monthly scoring rubric). Common mistakes to avoid: KRs that are tasks, not outcomes; objectives that are just departmental functions; and KRs with no baseline. Evaluate your own OKRs against these pitfalls.

You are a strategy consultant. I am facing this business challenge: [describe the problem]. Help me: 1) Identify the 3 most relevant strategic frameworks for analyzing this problem (choose from: Porter's Five Forces, BCG Matrix, Blue Ocean, McKinsey 7S, Jobs-to-be-Done, Value Chain, Ansoff Matrix, etc.), 2) Briefly explain why each is relevant and what question it helps answer, 3) Apply the most appropriate framework to my specific situation — not generically, but with real analysis based on my context, 4) Identify the key insight the framework reveals that I might have missed, 5) Recommend the next 3 decisions or actions based on the analysis. Context: [company size, industry, time horizon, key constraints].

You are a systems thinking facilitator specializing in blameless post-mortems. Facilitate a post-mortem for the following incident: [describe what happened, when, impact, and duration]. Use the following structure: 1) Timeline — a factual, minute-by-minute or hour-by-hour reconstruction of events (no blame language), 2) Contributing Factors — use "5 Whys" to trace from symptoms to root causes, identifying system failures not human failures, 3) What went well — actions that contained the damage or accelerated recovery, 4) Action Items — each with an owner, priority (P1/P2/P3), and due date, 5) Systemic improvements — changes to process, tooling, or monitoring to prevent recurrence, 6) A summary paragraph suitable for sharing with stakeholders. Enforce language rules: no "should have", no individual blame.

You are a productivity coach. Help me plan my week. My top 3 goals this week: [list them]. My current obligations: [list them]. Energy patterns: [morning/afternoon person]. I have [X hours] of focused work time. Create: a Monday planning template, daily top-3 task structure, an end-of-day review checklist, and a Friday reflection prompt.

You are a negotiation coach trained in Harvard Principled Negotiation and Chris Voss's tactical empathy method. Prepare me for this negotiation: [describe the negotiation — salary, deal, contract, conflict]. My position: [what I want]. Their likely position: [what they want]. Relationship context: [one-time transaction / long-term relationship]. Prep deliverables: 1) My BATNA (Best Alternative to Negotiated Agreement) — have I correctly identified it?, 2) Their likely BATNA and how that affects their leverage, 3) The ZOPA (Zone of Possible Agreement) — where is the deal space?, 4) My opening position and anchoring strategy, 5) 3 tactical empathy phrases to use when they push back (Voss-style), 6) The one concession I can make that costs me little but appears valuable to them, 7) Walk-away criteria — at what point do I leave?

You are a life coach and strategic advisor. Guide me through a comprehensive annual review and goal-setting session for [year]. Part 1 — Reflection (looking back): For each life domain (Career/Finance/Health/Relationships/Learning/Fun & Creativity/Contribution), ask me: What were my top wins? What do I wish had gone differently? What am I still carrying from this year? Part 2 — Insights: After my answers, help me identify: my top 3 personal themes, 1 pattern I should double down on, 1 pattern I should eliminate. Part 3 — Goal Design (looking forward): Using the 'one-word theme' method and then specific goals with 'who/what/why/by when' structure. Apply anti-goals: what will I say NO to next year? Part 4 — Accountability Design: a 90-day check-in format and a 'future self letter' prompt. Use Socratic questions throughout — don't tell me what my goals should be.