Claude Skills by SkillMedev

Builds a small nonprofit's individual-donor communication system - segmenting donors into major, recurring, first-time, and lapsed with different treatment for each, thanking within 48 hours of every gift, structuring impact stories around one beneficiary with the donor as hero, writing appeal letters, and holding a 3:1 impact-to-ask calendar ratio. Use when a nonprofit leader says "our donors are lapsing", "write our year-end appeal", "how often should we email donors", "write a thank-you le...

Runs structured diligence on an investment or acquisition target across four workstreams - commercial, financial, technical, and legal - and produces a red-flag register split into deal-killers versus manageable risks with a go/no-go recommendation. Use when someone asks "what should I check before investing", "run diligence on this company", "is this deal clean", or is preparing to wire money into a startup or acquisition. Do NOT use for decoding the clauses of a term sheet - use term-sheet-...

Converts an acceptance criterion or user story into one maintainable Playwright or Cypress end-to-end test that reads like the journey it covers. Use when turning a Given/When/Then acceptance criterion or user story into a browser test, when asked to "write an E2E test for this AC", or when a feature's critical journey (login, checkout, signup) needs a single automated scenario. Do NOT use when writing general Playwright tests, configuring the runner, or fixing existing test flakiness - use p...

Applies microeconomic frameworks - supply and demand, elasticity, marginal analysis, market structure, externalities - to a business decision and produces a recommendation with explicit assumptions and a sensitivity analysis showing which assumption flips the answer. Use when someone asks "what happens to revenue if we raise prices", "will profits in this market hold up", "how will competitors respond to this move", or needs the economic logic behind a pricing, entry, capacity, or regulation ...

Runs a structured exploratory data analysis on a new or suspect dataset - schema audit, target analysis, feature profiling, missingness patterns, and leakage checks - ending in a written decision log. Use when someone says "I just got this dataset, where do I start", "my model metrics look too good", "audit this data before we model it", or is debugging unexpected model behavior. Do NOT use for writing the transformation code itself - use pandas-expert instead; for ongoing production data mon...

Audits and protects sender reputation and inbox placement for permissioned marketing and lifecycle email - SPF, DKIM, and DMARC authentication, domain warmup, bounce and complaint thresholds, and engagement sunsetting - and delivers a scored deliverability audit checklist with a remediation order. Use when someone asks "why are my newsletters going to spam", "how do I set up SPF, DKIM, and DMARC", "is my bounce rate too high", "should I send marketing from a subdomain", or is launching a new ...

Designs automated onboarding and activation drip sequences with behavior-gated sends, exit triggers on conversion, and per-email jobs and timing. Use when someone asks "build an onboarding email sequence", "design a drip campaign for new signups", "why isn't our onboarding flow activating users", or is extending an existing drip series. Do NOT use for recurring content newsletters - use email-newsletter-pro; for recovering abandoned checkouts use abandoned-cart-sequence; for re-engaging dorma...

Write recurring email newsletters - subject lines that earn the open, preview text that extends them, a body structure readers finish, and cadence rules that keep the list healthy. Use when someone asks "write my newsletter", "give me subject line options", "why is my open rate dropping", "should I send weekly or monthly", or "help me structure this issue". Do NOT use for automated onboarding or behavior-triggered sequences - use email-drip-builder instead. Do NOT use for inbox placement and ...

Triages a batch of emails into delete, do-now, delegate, or defer decisions using the 2-minute rule, returning drafted replies, delegation forwards, and dated tasks. Use when someone says "help me get through my inbox", "triage these emails", "I have 200 unread messages, what needs a reply", or "turn this pile of email into a to-do list". Do NOT use for designing the ongoing system that keeps an inbox at zero - filters, folder setup, unsubscribe habits, daily routines - use inbox-zero instead.

Sizes an emergency fund from essential expenses and household risk tier, picks the right account, and builds the funding and replenishment schedule. Use when someone asks "how much should I have in savings", "how big should my emergency fund be", "where should I keep my emergency fund", or "should I save or pay off debt first". Do NOT use for sequencing debt payoff itself - use debt-payoff-planner instead; for planned irregular expenses like car registration or gifts, those are sinking funds ...

Reviews an employment agreement clause by clause, flags deviations from market-standard terms - non-compete scope, IP assignment breadth, cause definitions, equity mechanics - and produces a review table with recommended asks, explicitly bounded as not legal advice. Use when someone asks "can you review my offer letter", "is this non-compete normal", "what does this IP assignment clause mean", "should I push back on this severance term", or has an employment agreement in hand before signing. ...

Rolls up engineering team status into an exec-ready written update with exactly three sections - progress in outcomes, risks with likelihood and mitigation, and asks with owners and deadlines - scannable in under 90 seconds. Use when someone asks "write my weekly eng update", "summarize team status for leadership", "turn these standup notes into an exec update", or is prepping for a leadership sync. Do NOT use for updates to external or cross-functional stakeholders on a project - use stakeho...

Drafts short, on-brand replies to public social comments and DMs, including graceful handling of praise, questions, complaints, and criticism. Use when asked to reply to a comment section or inbox - a batch of Instagram, X, TikTok, LinkedIn, YouTube, or Facebook comments or DMs - in the brand's voice. Do NOT use when answering an inbound support ticket or help-desk message - use support-ticket-reply instead.

Defines and applies an SLO error-budget policy that gates feature work versus reliability work based on remaining budget. Use when setting up SLOs or when high burn rate lacks a formal team response protocol.

Designs typed, observable, recoverable error handling - an explicit taxonomy of retryable vs terminal failures, Result types at boundaries, single-point logging, and retry policies with real backoff numbers. Use when someone asks "should I retry this error", "how do I structure error types", "why are my logs full of duplicate stack traces", "where do I put the try/catch", or is designing failure paths for an API, job, or client. Do NOT use for building the circuit breaker component itself - u...

Rewrites error messages to be specific, actionable, and blame-free - what happened, why it helps to know, and what to do next - with tone calibrated to severity and developer-facing detail kept separate from the user-facing text. Use when someone asks "rewrite this error message", "our app just says something went wrong", "make this validation message less hostile", or is auditing error states before launch. Do NOT use for reviewing all in-product copy beyond errors - use ux-writing-audit ins...

Writes a tight escalation summary to engineering or management with a one-line headline, quantified customer impact, repro steps, prior attempts, and a single clear ask. Use when someone says "I need to escalate this ticket", "write this up for engineering", "this bug needs eng eyes", or a support issue must leave the queue for specialist action. Do NOT use for replying to the customer - use support-ticket-reply instead; do NOT use for assigning incident severity and coordinating an active ou...

Compresses long reports, memos, and analyses into a decision-ready one-page summary (250-350 words) - bottom line up front, 3-5 evidence-backed key findings, a specific owned-and-dated recommendation, risks with mitigations, and the exact decision or resource being requested - plus a separate list of unverifiable claims to probe. Use when someone says "summarize this report for the exec team", "give me a one-pager on this analysis", "write the BLUF for this memo", or a leader needs to act on ...

Builds a systematic expansion playbook for existing SaaS customers - a catalog of usage triggers (limit approach, new team adoption, milestone hit) with routing rules, outcome-anchored upsell and cross-sell talk tracks, ownership and comp models, and metrics led by net revenue retention. Use when someone asks "how do we grow revenue from existing accounts", "build an upsell playbook", "our NRR is too low", or wants trigger-based expansion instead of reps guessing. Do NOT use for designing tie...

Drafts a clear, enforceable expense and approval policy - per-category spend limits, a dollar-tiered approval matrix, receipt and documentation rules, 30/90-day submission deadlines, and audit sampling. Use when someone says "write our expense policy", "who should approve what spend", "set reimbursement rules", or is onboarding a finance system or preparing for a compliance review. Do NOT use for building a departmental or personal budget - use budget-builder instead; do NOT use for the month...

Sets up disciplined ML experiment tracking - run logging schemas, artifact versioning, naming conventions, and reproducibility standards - and produces the run-record template a team actually follows. Use when someone asks "how should we track our ML experiments", "why can't we reproduce this result", "how do I set up MLflow or W&B for the team", or is bootstrapping a new ML project. Do NOT use for analyzing product A/B tests - use ab-test-analyzer instead; for monitoring deployed models use ...

Designs an expert-interview package - sourcing criteria for the right experts, a funneled discussion guide with timing, open-then-probe question design, laddering, and a neutral probe kit - that extracts honest insight without leading the witness. Use when someone asks "help me write questions for an expert call", "build a discussion guide", "prep me for this expert network interview", or is planning customer-development or domain-expert conversations. Do NOT use for designing a full data-col...

Read a captured EXPLAIN ANALYZE plan, name the single bottleneck node, and prescribe a targeted fix for it. Use when a specific query is slow and you have (or can capture) its execution plan from Postgres or MySQL and need to know WHICH node is burning the time and why.

Designs feature-flag systems and lifecycle policy - flag taxonomy (release, ops/kill-switch, experiment, permission), percentage rollouts with stable bucketing, safe defaults, and mandatory removal deadlines so flags don't rot into dead code. Use when someone asks "how should I roll this out behind a flag", "kill switch vs feature flag", "how do I do a percentage rollout", "we have hundreds of stale flags", or is wiring up LaunchDarkly or a homegrown flag service. Do NOT use for designing the...

Designs a reusable, leakage-safe feature store - entity and naming contracts, point-in-time correct training joins, feature versioning, online/offline consistency with staleness SLOs, and governance. Use when someone asks "should we build a feature store", "how do I share features across models", "our model trains great but serves garbage", "how do I version a feature definition", or is diagnosing training-serving skew. Do NOT use for designing the feature transformations themselves - use ml-...

Drafts specific, observable, kind workplace feedback using the SBI model - Situation, Behavior, Impact - for both praise and correction. Use when someone asks "help me give feedback to a teammate", "how do I tell my report they keep missing deadlines", "make this feedback less vague", or wants to reinforce a good behavior specifically. Do NOT use for formal performance review documents - use performance-review-writer instead; for feedback on student work, use student-feedback-writer; for medi...

Writes individual fiction scenes with goal-conflict-turn structure, sensory grounding, interiority, and subtext-driven dialogue - then notes the turn accomplished and one craft choice so the writer can learn from it. Use when someone asks "write this scene for my novel", "my dialogue feels flat", "make this moment more immersive", or has plot beats that need dramatizing on the page. Do NOT use for plotting a whole novel's arc - use story-structure-architect instead; for revising a completed m...

Use when a task needs live or historical money data - "convert USD to EUR", "current/past exchange rate", "FX rate on this date / over this range", or "current price of Bitcoin/Ethereum, market cap, 24h change". Frankfurter (ECB reference rates, no key) is the FX default; CoinGecko's free keyless tier covers crypto. Do NOT use for stock quotes or equities - no keyless stock API survives verification, say so instead of guessing; do NOT use for country economic indicators like GDP or inflation ...

Builds a complete personal financial plan - a prioritized order of operations across budgeting, emergency savings, debt payoff, and goals - from the user's actual numbers, then routes each piece to the right specialist skill. Use when someone asks "help me get my finances in order", "where should my money go first", "should I pay off debt or save", "am I doing okay financially", or "build me a financial plan". Do NOT use for constructing the monthly budget itself - use budget-builder instead;...

Builds and interprets the income statement, balance sheet, and cash flow statement as one linked system - construction order, the three mechanical ties between statements, and the review checks that catch errors. Use when someone asks "build me a three-statement model", "why doesn't my balance sheet balance", "how does net income flow into the cash flow statement", "check this financial package for errors", or is explaining statements to stakeholders. Do NOT use for spreadsheet layout and for...

Use when someone asks to build a HIIT plan, interval-training block, metabolic conditioning or metcon, circuit training, work-capacity training, conditioning for fat loss, or high-intensity "get in shape" cardio (not easy steady-state). Builds a metabolic-conditioning block - interval and circuit work using EMOM, AMRAP, Tabata, and intervals - with format selection, work-to-rest ratios, weekly structure, and progression. General fitness guidance, not medical advice. This skill owns high-inten...

Root-causes intermittently failing tests and eliminates the hidden dependency at its source instead of retrying around it. Use when a test passes locally but fails in CI, goes green on a CI re-run, fails roughly one run in ten, or is already tagged "flaky." Do NOT use when the task is to design the fake or stub that replaces a real dependency - use mock-stub-designer instead.

Architects Flutter widget trees and Riverpod or Bloc state so rebuilds are scoped, build() stays pure, and const widgets skip recomposition. Use when someone asks "why is my Flutter screen janky", "should I use Riverpod or Bloc", "my whole page rebuilds when one field changes", or is building or refactoring Flutter screens, wiring StatelessWidget/StatefulWidget, Consumer, or BlocBuilder. Do NOT use for Android Jetpack Compose UI - use jetpack-compose-builder instead; do NOT use for React Nati...

Produces long-form business and consulting reports with a standalone executive summary, three-level heading hierarchy, and skimmability rules that let a busy reader navigate in under two minutes. Use when someone asks "write up this analysis as a report", "structure my strategy brief", "turn these findings into a client deliverable", or "make this document skimmable for executives". Do NOT use for presenting user-research findings to a product team - use research-readout instead; for a one-pa...

Builds a driver-based FP&A operating model linking business inputs to P&L, balance sheet, and cash flow outputs. Use when building an annual plan, preparing investor materials, running scenario analysis, or stress-testing the business.

Selects a defensible freelance niche and writes a positioning statement using the vertical x problem x outcome procedure, then aligns portfolio proof to it. Use when a freelancer or consultant says "I take any work that pays", "how do I niche down", "what should I specialize in", "write my positioning statement", "my portfolio is all over the place", or "clients see me as a pair of hands, not an expert". Do NOT use for positioning a product or company in a market category - use positioning-st...

Use when a task needs light entertainment content from a live API - "build a quiz/trivia game", "random dog picture", "cat fact", "advice of the day", "random fun fact" - for a demo, bot, party feature, or filler content slot. Open Trivia DB is the quiz default (its session-token mechanics are documented here); catfact.ninja, random.dog, Advice Slip, and Useless Facts cover the rest, all keyless. Do NOT use for placeholder users/products/images in a prototype - use test-placeholder-data inste...

Drives a fundraise from signed term sheet to wired money - a closing checklist covering confirmatory diligence with same-day response discipline, the definitive-docs list (stock purchase agreement, charter, investor rights, board consents), closing conditions with owners and dates, re-trade defense, multi-party sequencing behind the lead, and post-wire actions like share issuance and the first investor update. Use when a founder asks "what happens after the term sheet", "how long does closing...

Runs the audit an investor will run before a founder starts pitching - scoring metrics, story, team, and legal/financial hygiene red/yellow/green and returning a go, fix-first, or wait verdict with the milestones that turn each red gate green. Use when a founder asks "audit my fundraise readiness before I pitch", "run the audit an investor would run on my startup", "score my metrics, story, and team before I raise", "am I ready to start fundraising", or wants a fundraise checklist before any ...

Use when a founder is shaping the team for a raise or hiring against the round. Triggers on "team slide", "what hires do investors want", "how much equity for an early hire", "key hire before fundraising", "is my team fundable", "hiring plan for the round". Connects the team story, the gap-filling hires, and the equity to grant.

Builds the five-beat narrative spine - origin, insight, wedge, traction, vision - that answers why now, why you, and why this before any deck exists. Use when a founder says "help me craft my fundraising story", "investors don't get what we do", "what's our narrative for this round", or has metrics and a product but no story that survives a partner meeting. Do NOT use for turning the story into slides - use pitch-deck-builder instead; do NOT use for deciding stage, amount, or valuation - use ...

Use when a founder is deciding whether and how to raise. Triggers on "am I pre-seed or seed", "how much should I raise", "what stage am I", "what valuation can I get", "should I raise now or wait", "is my round too big". Sets the round, amount, and valuation envelope that every later step depends on.

Builds conversion funnels from raw event data with drop-off attribution, segment comparison, and significance testing, and delivers a filled funnel table with a diagnosed bottleneck and next action. Use when someone asks "where are users dropping off", "why did checkout conversion fall this week", "build a signup-to-activation funnel", or "is mobile converting worse than desktop". Do NOT use for rewriting page copy or layout to lift a known weak step - use landing-page-cro instead; for decomp...

Use when a task needs live geographic lookups - "geocode this address", "what's at these coordinates" (reverse geocoding), "lat/lon for this city", "which country/state is this ZIP or postal code in", or "country facts: capital, currency, population, flag". Nominatim (OpenStreetMap) is the geocoding default; Zippopotam for postal codes; APICountries for country facts. All keyless. Do NOT use for weather at a location - use weather-climate instead; do NOT use for country-level statistics over ...

Analyzes an author's writing samples, builds an explicit quantified voice profile, and produces new content indistinguishable from the author's own hand. Use when someone asks "write this in my voice", "ghostwrite my newsletter", "make this sound like me", "draft the next chapter the way I would write it", or supplies writing samples plus a brief for a new piece. Do NOT use for drafting a persuasive opinion piece to pitch to a publication - use op-ed-writer instead. Do NOT use for LinkedIn-na...

Designs and hardens GitHub Actions CI/CD - pipelines that hit a sub-10-minute PR feedback budget through caching and parallelism, with least-privilege security and safe deploy gates. Use when someone asks "why is my CI so slow", "how do I cache node_modules properly", "set up a deploy workflow", "is pull_request_target safe here", or wants a workflow written or reviewed. Do NOT use for provisioning the cloud infrastructure the pipeline deploys to - use terraform-expert instead; do NOT use for...

Build a sequenced go-to-market plan - beachhead ICP, positioning, one or two channels, and dated milestones - instead of a scattershot launch. Use when someone asks "how do I take this to market", "what's my GTM strategy", "which channel should I start with", "who should I sell to first", or is planning a new product or a new market entry. Do NOT use for the dated launch-week timeline and asset checklist - use launch-plan-sequencer instead; for Product Hunt copy and day-of tactics use product...

Turns vague intentions into SMART goals with both lagging targets and controllable leading indicators, then keeps them alive with a 10-minute weekly check-in template, an accountability structure (visible goals, public commitments, partner check-ins), and a quarterly reflection that converts the quarter into lessons. Use when someone says "help me set goals I'll actually stick to", "I set resolutions and abandon them by February", "build me a goal tracking system", or wants a weekly review ca...

Optimizes a Google Business Profile as the storefront of a local service business - primary category selection, service-area setup, weekly photo cadence, Q&A seeding, posts, and NAP consistency - ordered by ranking impact. Use when an owner asks "why don't I show up on Google Maps", "how do I set up my Google Business Profile", "what category should my business be", or "how do I get more calls from Google". Do NOT use for broader local ranking strategy across the website and citations - use l...

Use when a task needs official country-level statistics - "GDP / population / life expectancy / inflation / unemployment for country X over time", "compare indicator Y across countries", or EU-official figures ("Eurostat says…"). World Bank Indicators is the default (no key, every country, 1,400+ series back decades); Eurostat covers EU-official statistics. Do NOT use for a country's static facts like capital or currency - use geo-places instead; do NOT use for live FX rates or crypto - use f...