
What Are Agent Skills? SKILL.md Explained (2026)
Agent skills are reusable instruction folders an AI loads on demand. SKILL.md explained, who supports it, and how teachers and marketers use it.
The FindSkill AI Glossary
Investopedia depth, plain language, profession-specific examples. If your boss just dropped 'agentic AI' or 'MCP' into a Slack message, this is where you go to actually understand what they meant — and what to do about it.
The AI vocabulary is moving faster than most people can keep up. Every keynote ships three new acronyms; every product launch overloads an old word. Working professionals — the marketers, accountants, teachers, nurses, small-business owners we serve — keep getting handed terms in meetings and Slack threads they can’t easily Google because the existing explainers are written for developers, not for them.
This glossary is the fix. Each page is an Investopedia-depth explainer of one AI term: what it is in plain language, why it exists, how it works (in just enough technical detail), what it means for your specific job, what it can’t do, and how to start learning if you want to go deeper.
We update each page on a quarterly cadence — the front-matter date tells you when it was last reviewed, and when the next review is due. If a vendor changes something significant, we ship a refresh within the same week.
Sorted alphabetically. Click any card for the full Investopedia-depth page.

Agent skills are reusable instruction folders an AI loads on demand. SKILL.md explained, who supports it, and how teachers and marketers use it.

AI Credits are the metered currency that usage-based AI tools bill you in — 1 credit usually equals $0.01. GitHub Copilot moved every plan to them on June 1, 2026. Here's how they …

AI glasses are eyeglasses with a camera and built-in AI assistant you talk to about what you see. What they do, how they work, and if they're worth it.

AI usage limits cap how much you can use ChatGPT, Claude or Gemini per window. How five-hour and weekly caps work, what burns them, and your options.

ChatGPT connectors link ChatGPT to your Gmail, Drive, Outlook, and Calendar so it can read, summarize, and now send email. What they do, cost, and safety.

Claude connectors link Claude to apps like Gmail, Calendar, Drive and Zillow so it can look things up and, with approval, act. What they do, cost, safety.
Google AI Overviews are AI summaries above search results: how they work, how to filter or manage them, and what they mean for work. 2.5B monthly users.

Sponsored Agents are OpenAI's labeled, conversational ChatGPT ad format, launched Sept 16, 2026. A user chats directly with a business's AI agent before clicking through.

Computer-using agents (CUAs) are AI systems that drive a real computer — clicking buttons, typing into forms, navigating apps — like a human. By May 2026, every major AI vendor …

A context window is how much an AI can read at once, in tokens. Why ChatGPT forgets, what 200K vs 2M means, and what it changes for your job.

A Copilot agent is a custom AI assistant you build in Microsoft Copilot Studio for one job. What it is, what it costs, and what it means for you.
A deepfake is AI-edited or AI-made video, audio or imagery of a real person. How they work, what US law says, and how to check one before you share it.

A frontier model is one of the most capable AI models at the cutting edge. What counts, who builds them, and what it means for your work in 2026.
A personal avatar is an AI video twin built from a selfie and voice clip — it delivers any script on camera. How it works, who gets it, where it wins.
A proactive AI agent works between your chats, tells you what needs you, and asks before it acts. How Duet, dots and Muse differ, and what to check first.

Agentic AI takes multi-step actions toward a goal — not just answers. 31% of enterprises run one in production (2026). What it means for your job.

Agentic calling is AI phoning businesses on a customer's behalf — nationwide for US home repair in 2026. What it is and how to win the call.

Agentic commerce lets AI assistants discover, compare, and buy products for shoppers. AI-referred traffic now converts ~50% better than search.

AI content moderation scans posts and accounts against platform rules and removes what it flags — often with no human review. Why it bans real people.

AI fluency means working with AI well, not just prompting. The 4D framework — Delegation, Description, Discernment, Diligence — is becoming the standard.

AI hallucination is when a model states something false with confidence — fake citations, invented facts. Why it happens, examples, how to defend.

AI literacy is the ability to use, understand, evaluate, and responsibly apply AI — the 4-pillar framework and what it means for your job in 2026.

AI memory lets a chatbot remember you between chats. How it works in 2026 — short-term vs long-term memory, the new ChatGPT system, and how to control it.

AI slop is low-quality, mass-produced AI content flooding your feed. What it is, how to spot AI video and images, and what the 2026 platform rules change.

AI visibility is how often your brand appears in ChatGPT, Claude, Perplexity, and Gemini answers. AI Overviews hit 48% of queries in 2026.

AI voice cloning copies how someone sounds from seconds of audio. How it works, why the scam version fools careful people, and how to stay safe.

Alexa+ is Amazon's AI voice assistant, built on Nova and Claude. Free on Fire TV since Aug 2026 — what it does, what still costs money, how it works.

Amazon Rufus is Amazon's AI shopping assistant — now Alexa for Shopping. 300M shoppers used it in 2025. What it reads in your listing, how to rank in it.

Ambient AI listens during natural conversation and quietly drafts notes, summaries, and structured records. By May 2026, two-thirds of US Epic hospitals use it. Here's what it …

An AEDT is an automated employment decision tool—AI that screens or ranks job candidates. The 2026 disclosure laws, and whether ChatGPT qualifies.

An AI browser reads pages and does the clicking for you. What Perplexity Comet, Chrome Auto Browse and ChatGPT's Chrome extension do, and the catch.

An AI detector estimates whether text was machine-written using perplexity and burstiness. Accuracy claims vs the 61% false-positive study, explained.

An AI notetaker records, transcribes, and summarizes meetings into notes and action items. Free vs paid tools, consent rules, and the 95% accuracy limit.

An AI quiz generator turns your notes or a PDF into a ready-to-use quiz in seconds. How it works, what it gets wrong, and who's using it in 2026.

An AI receptionist answers business calls 24/7, books appointments, and texts back missed calls. Costs $25–$300/mo — here's who actually needs one.

An AI scribe listens to conversations and drafts your documentation — clinical notes, call summaries, meeting minutes. Real savings, costs, limits.

An AI text watermark is an invisible pattern a model leaves in its word choices. How it works, who uses one, and why editing erases it, with real numbers.

An open-weight model is an AI whose parameters you can download and run yourself. Why it isn't open source — and why it's making AI far cheaper.

Answer engine optimization (AEO) gets your business cited by ChatGPT, Perplexity, and Google AI Overviews. 45% now use AI to find local services.

Apple Intelligence is Apple's built-in AI for iPhone, iPad, and Mac. What it does, which devices get it, and why the new Gemini-powered Siri matters.

Apple Reference Image lets an iPhone 18 Pro prove a photo wasn't AI-edited. Here's how the tech works, its real limits, and what it means for your job.

Ask Maps is Google's Gemini chat inside Google Maps: ask full place questions, plan stops, save lists. What it does, where it's live, what to verify.

C2PA (Content Credentials) is the cryptographic receipt that proves where a photo came from and whether AI made it — what it does and can't do in 2026.

ChatGPT Ads shows sponsored cards to Free/Go users, live in 10 countries by Aug 2026. Who sees them, how advertisers buy in, and how to stay ad-free.

ChatGPT Health connects your Apple Health data and medical records so ChatGPT can explain lab results. What it does, the privacy reality, and its limits.

ChatGPT Images is OpenAI's built-in image generator on gpt-image-2, replacing the DALL·E GPT (retiring Aug 30, 2026) — what actually changed.

ChatGPT Lockdown Mode is an opt-in setting that limits data leaks from prompt-injection attacks. What it disables, who needs it, and how to turn it on.

ChatGPT Projects is a free workspace holding your chats, files, and instructions together. Exact plan limits, plus the August 2026 voice update.

ChatGPT Work is OpenAI's agent workspace that builds docs, spreadsheets, decks and web apps in the background. Free users get GPT-5.6 Terra.

ChatGPT Writing Style reads your Gmail and Slack to draft in your voice. Who has it, what OpenAI hasn't disclosed, and the free method that works today.

Claude Cowork is Anthropic's agentic desktop app that runs multi-step work in your apps. Its new Record a Skill feature teaches it by screen recording.

Claude Dashboards turns a plain-English question into a live dashboard on your data warehouse or CRM. Who gets it, what it needs, and what it can't do.

Claude Slides is Anthropic's in-chat presentation tool, launched Sept 16, 2026 and free on every plan since Oct 8. Ask for a deck, get editable slides.

Describe a Shortcut is Apple's iOS 27 feature that builds a working automation from one plain-English sentence. Needs iPhone 15 Pro+ — see who it's for.

Gemini 4 Argon is Google's top AI model, live since Oct 13 for Pro and Ultra only. What it is, what it beats and doesn't, and who should care.

Gemini Notebook is Google's renamed NotebookLM: a research tool that answers only from documents you upload, and cites them. 30M+ users, still free.

Gemini Spark is Google's 24/7 AI agent that runs tasks for you, not just answers. It works in the background and asks before it spends money or sends mail.

Google AI Mode is Search's conversational, Gemini-powered answer experience. How it differs from AI Overviews, how to turn it on, and why it matters.

Antigravity is Google's agent-first development platform — desktop app, CLI, SDK, and runtime. Launched at I/O 2026, it's the engine under Gemini Spark and the successor to Gemini …

Google Deep Review is a free AI that checks your finished document for logic gaps and math errors. 2 reviews a week. What it does, what it misses.

Google Sheets canvas turns a spreadsheet into a live, synced mini-app from a plain-English prompt. Who has access, and what it means for your job.

Google Universal Cart is one shopping cart across Search AI Mode and Gemini, live in the US since Oct 15, 2026. What it does and what it means for sellers.

Grok Imagine is the image and video generator inside Grok — type a sentence, get a picture, animate it into a short clip. What it is, limits, work uses.

Intelligent UI lets ChatGPT answer with calculators, charts, forms and diagrams you can use in the chat. What it is, how it works, and what to check.

MCP is the open standard that lets any AI assistant talk to any tool. Anthropic shipped it in late 2024 — by May 2026, Google, OpenAI, Microsoft, and most agent frameworks adopted …

Multi-agent orchestration is the coordination of several AI agents on one task. Search demand grew 376% in 2026. Here's how it actually works.

Nano Banana is Google Gemini's free AI image model — fast photo fixes, product shots, restorations. What it is and how your job can use it.

Personal Intelligence lets Google Gemini read your Gmail, Calendar and Photos to personalize answers. What it is, what it connects, and how to control it.

Private AI is AI that doesn't train on your chats. The three kinds, the two toggles that fix ChatGPT and Gemini, and the free no-setup options for 2026.

Prompt injection is the #1 AI security risk of 2026: hidden text that hijacks an AI's instructions. How it works, real 2026 examples, and how to stay safe.

Reasoning mode lets an AI chatbot spend more compute thinking before it answers. How ChatGPT's Think button, Claude's effort levels, and Gemini differ.

Self-hosted AI means running an AI model on your own computer instead of a cloud tool like ChatGPT. Why people want it, and when it's worth it.

Siri AI is Apple's rebuilt iOS 27 assistant — conversational, screen-aware, reportedly Gemini-powered. What it does, who gets it, and the EU catch.

Spatial Reframing is Apple's iOS 27 Photos tool that changes a photo's camera angle after the shot. How it works, which iPhones get it, and its limits.

Speaker diarization is how AI labels who spoke when in a transcript. How it works, why names go wrong, and what it means for your job.

Surveillance pricing sets your price from your personal data. What it is, how it differs from dynamic pricing, which states ban it, and what shops do.

SynthID is Google DeepMind's invisible watermark for AI-generated text, images, audio, and video. By May 2026, 10+ billion pieces watermarked. Here's what it does, what it can't …

Temporary Chat is a ChatGPT mode that skips history, Memory, and training. What it protects, what it can't, and how it differs from Memory — explained.

Agent Payments Protocol (AP2) is the open standard that lets AI agents make purchases safely. Google introduced it at I/O 2026. Here's what it controls, why it exists, and what it …

The Meta Business Agent is a free AI answering customers in WhatsApp, Instagram & Messenger — products, bookings, leads. Setup, limits, Aug 2 rule.

The Personal Agent Protocol (PAP) is Sierra and Meta's open standard for how AI agents sign in to businesses for you. What's confirmed and what it means.

WebMCP lets a website hand AI agents real tools instead of being scraped. It entered a Chrome 149 trial in May 2026 — here's what it means for your site.
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