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SkillMedev/skills

Write one platform-native caption from a topic and brand voice, with a front-loaded hook, native length, and a single earned CTA. Use when the user gives a topic (and optionally brand voice or a described image/video) and asks for an Instagram, LinkedIn, X/Twitter, or TikTok caption. Do NOT use when the user wants a dedicated standalone LinkedIn post - use linkedin-post-writer instead; or a multi-post X thread - use tweet-thread-builder instead; or to adapt one existing piece of content into versions for several channels - use cross-platform-reformatter instead.

¿Qué es skills?

skills is a Claude Code agent skill that write one platform-native caption from a topic and brand voice, with a front-loaded hook, native length, and a single earned CTA. Use when the user gives a topic (and optionally brand voice or a described image/video) and asks for an Instagram, LinkedIn, X/Twitter, or TikTok caption. Do NOT use when the user wants a dedicated standalone LinkedIn post - use linkedin-post-writer instead; or a multi-post X thread - use tweet-thread-builder instead; or to adapt one existing piece of content into versions for several channels - use cross-platform-reformatter instead.

Compatible con~Claude Code~Codex CLI~Cursor
npx skills add https://github.com/SkillMedev/skills/tree/HEAD/skills/social-caption-writer
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Documentación

Social Caption Writer

Turn a topic plus brand voice into one platform-native caption that wins the first line and earns one specific action.

Workflow

  1. Confirm the platform (Instagram, LinkedIn, X/Twitter, or TikTok). If unstated, ask - every length, shape, and CTA below is platform-specific.
  2. Pin the brand voice. Use the traits the user gave. If they gave none, ask for 2-3 adjectives and one phrase the brand would never say before writing.
  3. Check the paired asset. If an image or video is described, write the caption to complement it (don't restate what's visible). If undescribed, ask - the caption's job depends on what it ships with.
  4. Reject thin or off-brand topics. If there's nothing to say, name that and propose a sharper angle instead of dressing up nothing.
  5. Write the hook into the first sentence - before the truncation cutoff (~125 chars on Instagram, ~140 on LinkedIn, the first line on X, one breath on TikTok). Lead with tension, a number, a contrarian claim, or a stakes-raising question. Never open with throat-clearing context.
  6. Fit native length and shape: Instagram 138-150 chars for punchy, or 1-3 tight paragraphs for storytelling; LinkedIn 1300-2000 chars with one-sentence lines and white space between them; X under 280, ideally ~100 so it breathes; TikTok short and curiosity-driven since the video carries the load. Use generous line breaks on Instagram and LinkedIn for mobile reading.
  7. Carry voice in word choice and rhythm, not adjectives: cut exclamation points for a dry/technical brand; let fragments and asides through for a playful one.
  8. End with exactly one specific CTA matched to platform behavior - saves/comments on Instagram, thoughtful replies on LinkedIn, reply/repost on X, follow/duet on TikTok. Make it concrete ("Save this for your next launch", not "engage with us"). Reference a link only when there's a real reason to leave the app.

Quality bar

  • The first sentence stands alone as a reason to keep reading, with no context preamble before it.
  • Length and line-break shape match the chosen platform's range above.
  • The brand's voice is detectable in the verbs and rhythm, not just a sign-off.
  • Exactly one CTA, specific and matched to how people act on that platform.
  • Emojis used as accents, never as punctuation replacements.

Deliverable

Produce one ready-to-paste caption for the confirmed platform, formatted with its native line breaks, plus two support lines beneath it: the hook character count (proving it lands before the truncation cutoff) and any hashtags or link note called out separately so the user can drop or move them per their posting tool. One platform, one caption, one CTA - variants only if the user asks.

Do NOT

  • Open with "In today's fast-paced world" or any throat-clearing context.
  • Use engagement-bait: "comment YES below", tag-3-friends chains, follow-for-follow - platforms suppress it.
  • Keyword-stuff the caption body.
  • Stack multiple CTAs or default to "link in bio" with no real reason.
  • Write a generic "social" caption that ignores the target platform's reading posture.

Individual skills in this repo

This repo contains 17 individual skills — each has its own dedicated page.

SkillMedev/skills

Designs REST API surfaces - resource naming, HTTP method and status-code semantics, error shapes, pagination, and filtering - and delivers an endpoint spec a consumer can build against without asking questions. Use when someone asks "how should I name this endpoint", "what status code should this return", "should this be PUT or PATCH", "how do I paginate this list", or is reviewing an API before it ships to external consumers. Do NOT use for planning breaking-change rollouts and deprecation windows - use api-versioning-strategist instead; for GraphQL type and resolver design - use graphql-schema instead; for generating client SDKs from an existing spec - use api-client-generator instead; for designing inbound webhook endpoints - use webhook-receiver-hardener instead.

SkillMedev/skills

Produce an accurate, properly timed caption track (SRT or WebVTT) from a video's audio - transcribing or aligning to the voiceover script, timing cues to speech, and enforcing line-length and reading-speed rules so captions are readable and in sync. Use when someone says "generate captions", "make subtitles from the audio", "transcribe and caption this", "export an SRT or VTT", "the captions are out of sync", or "the subtitles flash by too fast to read". Do NOT use to burn-in, style, reframe, or position an existing caption track for a platform (9:16, brand styling, safe areas) - that is social-video-formatter; do NOT use to animate text word-by-word as a motion graphic - that is kinetic-typography; do NOT use to write the spoken script in the first place - that is narration-script.

SkillMedev/skills

Turns data and charts into a decision-driving narrative structured as headline finding, trend, implication, and recommended action - with finding-led chart titles, context for every number, annotation guidance, and honest flags on any conclusion the data cannot support. Use when someone says "turn these numbers into a story", "what's the takeaway from this data", "help me present these results to leadership", or has charts but no narrative. Do NOT use for compressing a long document into a one-pager - use executive-summary instead - or for running the analysis that produces the findings - use eda-playbook instead.

SkillMedev/skills

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 series - use government-open-data instead; if the request is a vague "I need live data", route through public-data-api-picker.

SkillMedev/skills

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.

SkillMedev/skills

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 time (GDP, population trends) - use government-open-data instead; if the request is a vague "I need live data", route through public-data-api-picker.

SkillMedev/skills

Runs the full Getting Things Done loop - capture, clarify, organize, reflect, engage - building a trusted system of context lists, a projects list with defined next actions, and a weekly review habit. Use when someone says "I'm overwhelmed and things are slipping through the cracks", "set up GTD for me", "help me do a brain dump and organize it", or "my to-do list is a mess". Do NOT use for just running the weekly review ritual itself - use weekly-review instead - or for clearing an email backlog - use inbox-zero.

SkillMedev/skills

Processes any email backlog to zero using the 4Ds - Delete, Delegate, Defer, Do - with a mass-archive strategy for the obvious, a touch-each-email-once discipline, and a keep-it-clear system of batched processing windows, ruthless unsubscribing, filters, and a minimal folder setup. Use when someone says "I have 5,000 unread emails", "help me get to inbox zero", "email is eating my whole day", or treats their inbox as a to-do list. Do NOT use for drafting the reply emails themselves or prioritization rules for an ongoing support queue - use email-triage instead - or for protecting focus time around the email windows - use deep-work-planner instead.

SkillMedev/skills

Runs structured coaching sessions using values clarification and the GROW model, ending every session with one committed action, a deadline, and an if-then plan for the likely obstacle. Use when someone says "I feel stuck in my life", "help me figure out what I want", "hold me accountable to my goals", or "coach me through this decision". Do NOT use for building a stress toolkit - use stress-management instead - or a journaling practice - use journal-framework; for a standing goal-tracking system, use goals-accountability. Coaching, not therapy: signs of clinical distress route to a licensed professional.

SkillMedev/skills

Adapts English content for a target language and region - swapping idioms, setting the right formality register, replacing cultural references, converting dates, units, and currency - and delivers the localized text with a notes column explaining each adaptation and flagging what needs a native reviewer. Use when someone asks "localize this copy for the Japanese market", "adapt our marketing copy for the Mexican market", "make this translation sound native instead of literal", or a literal translation reads foreign, stiff, or risky. Do NOT use for auditing in-product UI text quality - use ux-writing-audit instead.

SkillMedev/skills

Turns a natural-language video brief into a complete, ready-to-preview Remotion composition - extracts duration, scenes, brand colors, aspect ratio, and real copy; plans the frame budget; and writes data-driven React/TypeScript using useCurrentFrame, interpolate, spring, AbsoluteFill, and Sequence, registered in Root.tsx. Use when someone says "build a 20-second product demo video", "animate a feature walkthrough", "write the Remotion code for this marketing clip", or wants a scene-by-scene composition they can scrub in Studio. Do NOT use for rendering, iterating, or batching the finished MP4 - use remotion-render instead - or for installing and scaffolding the project - use remotion-setup instead.

SkillMedev/skills

Scaffolds a new Remotion video project wired for Claude Code Agent Skills - Node check, create-video scaffold, skills install, folder conventions, Google Fonts, and a smoke-test render. Use whenever someone wants to start making videos with Remotion and Claude, even just "make product videos with Claude.

SkillMedev/skills

Classifies incident severity (SEV1-4) using impact, scope, and urgency signals and decides who to page. Use when an alert fires or a report comes in and a severity call must be made quickly.

SkillMedev/skills

Use the Skill Me catalog from inside any conversation - discover, install, and manage Claude skills through the Skill Me MCP, and load installed skills automatically each session.

SkillMedev/skills

Reframe and export a finished video for social platforms - 9:16 ↔ 16:9 cropping, burned-in captions, a platform-native first frame, loop design, and per-platform specs (aspect, length, safe areas) for TikTok, Reels, Shorts, X, and LinkedIn. Use when someone says "make this vertical", "crop to 9:16", "format for TikTok/Reels/Shorts", "add captions/subtitles", "why is my video cut off on mobile", "resize for Instagram", or "export for social". Do NOT use when the question is about the storyboard or shot order before any video exists (use video-storyboard); the animation craft of how elements move (use motion-design-principles); animated word-by-word caption styling (use kinetic-typography); palette, contrast, or lighting (use motion-color-and-light); directing the product-demo content and screen choreography (use product-demo-director); or scoring, beat-syncing, or audio (use sound-and-music-sync) - this is the craft layer that decides WHAT to format for the feed, then hands a concrete spec to remotion-compo...

SkillMedev/skills

Writes and tunes PySpark jobs - join strategy and broadcast size limits, shuffle-partition sizing, skew diagnosis and salting, UDF avoidance, caching, and output file layout - with concrete size and skew thresholds. Use when someone asks "why is my Spark job slow", "should I broadcast this join", "one task takes forever while the rest finish", "my job OOMs during a join", or is writing a new PySpark ETL job. Do NOT use for Kafka topic, consumer-group, or streaming-pipeline design - use kafka-pipelines instead; do NOT use for single-machine dataframe work that fits in memory - use pandas-expert instead.

SkillMedev/skills

Builds clean, performant, accessible SwiftUI views with correct state ownership, scoped invalidation, and smooth list scrolling, and reviews existing SwiftUI code against a concrete frame-time and re-render budget. Use when someone asks "why does my SwiftUI list stutter", "should this be @State or @Observable", "my whole screen re-renders when one row changes", "how do I animate this transition", or wants a SwiftUI view built or refactored. Do NOT use for cross-platform React Native apps - use react-native-pro instead; do NOT use for Flutter widget trees - use flutter-widget-architect instead; do NOT use for Android Compose UIs - use jetpack-compose-builder instead.

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