# cgallic > Open-source publisher. Listings imported from github.com/cgallic — credited to the original author with their license. - **Listings:** 51 - **Total installs:** 0 - **Profile:** https://agentstack.voostack.com/s/cgallic - **Website:** https://github.com/cgallic ## Published listings - [Kai Sales Meeting Prep](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-sales-meeting-prep) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-sales-meeting-prep` > - [Kai Brand](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-brand) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-brand` Brand positioning workshop — define messaging framework, voice/tone, differentiation strategy, and taglines. Use when "brand positioning", "messaging framework", "brand voice", "how should we position ourselves", "differentiation", "tagline", or any request to define or refine brand identity and messaging. - [Kai Retro](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-retro) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-retro` Run a learning retrospective on the Kai harness. Mines gate-failure logs and 30-day performance results into lessons, triages candidate lessons (promote/keep/retire), and graduates repeated lessons into enforced gate checks with golden corpus cases. Use when "retro", "what have we learned", "triage lessons", "promote lessons", "why does this keep failing", "harness retrospective", or monthly / af… - [Content Gate](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-content-gate) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-content-gate` Run the full quality gate on any content file. Score against 28 rules, apply policy, show detailed scorecard with fix suggestions. Works on any markdown file. - [Kai Partnership](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-partnership) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-partnership` Partnership and co-marketing campaign planner — partner selection criteria, joint content strategy, cross-promotion plans, and co-branded assets. Use when "partnership", "co-marketing", "partner program", "cross-promotion", "joint venture", "co-branded", "partner campaign", or any request to plan or execute a marketing partnership. - [Kai Budget](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-budget) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-budget` Marketing budget planning and forecasting — channel allocation, CAC targets, ROI projections, and spend optimization. Use when "marketing budget", "budget planning", "channel allocation", "marketing spend", "CAC forecast", "budget forecast", "how much should I spend", "allocate budget", or any request to plan, forecast, or optimize marketing spend. - [Content Report](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-content-report) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-content-report` Pull performance data for published content across every surface — LinkedIn, Dev.to, Google Search Console, GA4, and AI citation tracking (Perplexity, Anthropic, OpenAI). Grades each piece as winner, average, or underperformer and surfaces whether an AI search engine has cited it. - [Kai Brief](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-brief) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-brief` Create a structured content brief using the Kai CMO Harness brief schema. Selects persona, defines angle, sets quality targets. Use when "create a brief", "content brief", "plan this content", "brief for [topic]", "what persona should I use", or before any content creation to define the strategy. Outputs a brief that /kai-write and /kai-email-system consume. - [Content Write](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-content-write) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-content-write` Write content using the most recent brief. Loads framework rules, persona hooks, learned patterns, and skill contract. Auto-runs quality gate on completion. - [Kai Podcast](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-podcast) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-podcast` Launch a podcast or plan podcast guest strategy — format, content planning, episode production, guest outreach, and distribution. Use when "podcast", "start a podcast", "podcast marketing", "podcast guest", "podcast strategy", "be a podcast guest", "launch a show", or any request related to podcast creation or guest appearances. - [Content Retro](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-content-retro) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-content-retro` Analyze content performance patterns. Extract what works (hook types, formats, personas). Auto-update learned defaults so future content improves. - [Kai Audit](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-audit) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-audit` Full marketing audit — runs all relevant checklists against your product, site, and marketing in one go. Covers SEO, content, email, ads, social media, CRO, landing pages, technical SEO, and creative production. Produces a "state of your marketing" report with health scores per area and a prioritized fix list. Use when "marketing audit", "full audit", "audit everything", "marketing health check",… - [Kai Growth Plan](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-growth-plan) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-growth-plan` Generate a stage-appropriate marketing plan based on your company's MRR/stage. Uses the marketing-by-stage playbook to tell you exactly what to do (and what NOT to do) at pre-launch, early ($0-10K MRR), growth ($10-100K MRR), or scale ($100K+ MRR). Use when "what should I do for marketing", "growth plan", "marketing plan", "I just raised a round", "marketing strategy", "what's the right marketing… - [Kai Analytics](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-analytics) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-analytics` Analytics and attribution setup — tracking plan, UTM conventions, dashboard design, and attribution model selection. Use when "analytics setup", "attribution", "tracking plan", "UTM", "marketing analytics", "dashboard setup", "measurement strategy", "how do I track", "which metrics", or any request to set up or improve marketing measurement and attribution. - [Kai Html Presentation](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-html-presentation) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-html-presentation` Client-ready HTML presentation builder for Kai audit and report folders. Converts weekly audits, monthly audits, marketing reports, scorecards, findings, data-source notes, and action plans into a polished single-file HTML deck with sourced metrics, executive slides, speaker notes, and delivery-ready styling. Use when "HTML presentation", "HTML deck", "client-ready audit deck", "turn this audit i… - [Checklist](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-checklist) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-checklist` Surface the right marketing checklist for any task. Covers content, SEO, ads, email, press, landing pages, launches, and technical audits. 17+ checklists indexed by task type. - [Kai Retarget](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-retarget) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-retarget` Design retargeting and remarketing campaign architecture across platforms — audience segmentation, creative strategy, frequency caps, and platform-specific setup with ad policy compliance. Use when "retargeting", "remarketing", "retarget", "re-engage visitors", "abandoned cart", "pixel setup", or any request to bring back visitors who didn't convert. - [Kai Daily Ad Review](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-daily-ad-review) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-daily-ad-review` Daily ad performance check-in across platforms. Pulls live metrics from Meta, Google, and LinkedIn via deterministic scripts, compares against benchmarks and previous period, flags overspend/underperformers/policy issues, and outputs a quick daily summary with action items. Use when "daily ad review", "how are my ads doing today", "ad check-in", "morning ad report", "daily ad summary", "check ad… - [Kai Sdr Operator](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-sdr-operator) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-sdr-operator` > - [Creative Brief](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-creative-brief) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-creative-brief` Generate creative direction for ad campaigns — visual concepts, copy variants, video scripts, image specifications, and A/B test matrices. Platform-aware with format specs. - [Kai Cold Outreach](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-cold-outreach) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-cold-outreach` Build a complete cold email outreach system — ICP definition, sequence architecture, personalization strategy, and batch-produced email sequences with CAN-SPAM/deliverability compliance. Use when "cold outreach", "cold email sequence", "outbound campaign", "prospecting emails", "sales outreach", "build outreach sequence", or any request to create systematic cold email campaigns for lead generatio… - [Ad Research](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-ad-research) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-ad-research` Research competitor ads using Meta Ad Library, Google Ads Transparency Center, and TikTok Creative Center. Analyze creative patterns, hooks, offers, and landing pages. - [Kai Repurpose](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-repurpose) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-repurpose` Take one pillar content piece and produce 15-25 derivative assets across platforms — social posts, email, LinkedIn article, video scripts, newsletter section, infographic brief, and more. The ultimate content multiplier. Use when "repurpose this", "turn this into", "make social posts from this blog", "content repurposing", "1 to many", "atomize this content", "extract posts from", or any request… - [Content Ideas](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-content-ideas) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-content-ideas` Suggest content topics ranked by opportunity score. Analyzes GSC keyword data and cross-references with personas to find high-potential topics. - [Ad Render](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-ad-render) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-ad-render` Render video ads using Remotion. Scaffolds a project from brand tokens + creative brief, generates scene compositions for 4 archetypes, renders to MP4 in multiple formats. - [Kai Influencer](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-influencer) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-influencer` Plan influencer marketing campaigns — find creators, write briefs, manage partnerships, and measure ROI. Use when "influencer", "influencer marketing", "creator campaign", "UGC campaign", "brand ambassador", "creator partnership", or any request to work with influencers or content creators. - [Kai Seo Audit](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-seo-audit) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-seo-audit` One-click technical SEO audit of a website. Runs the full technical SEO audit SOP — crawlability, indexation, Core Web Vitals, schema markup, internal linking, mobile UX, and content quality. Outputs a prioritized fix list. Use when "SEO audit", "technical SEO", "site audit", "crawl issues", "indexation problems", "why aren't we ranking", "SEO health check", or any request to diagnose SEO issues… - [Kai Ad Campaign](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-ad-campaign) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-ad-campaign` Plan, evaluate, and produce paid ad campaigns across platforms (Meta, Google, LinkedIn, TikTok, Microsoft, Pinterest, Snapchat, Amazon, X). Evaluate existing ads, map funnel stages (TOF/MOF/BOF), produce ad variants per platform with policy compliance, output ready-to-upload copy. Use when "ad campaign", "create ads", "run ads for", "paid campaign", "media plan", "launch ads", "Meta campaign", "G… - [Kai Newsletter](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-newsletter) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-newsletter` Plan and produce newsletter editions — content selection, subject lines, scheduling, and production with quality gates. Use when "newsletter", "plan newsletter", "newsletter content", "email newsletter", "weekly digest", or any request to create or manage a newsletter. - [Kai Reddit Listen](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-reddit-listen) — Skill · Free — `agentstack add skill-cgallic-kai-cmo-harness-kai-reddit-listen` Monitor Reddit for conversation-fit opportunities — watches a list of subreddits, keyword-filters new posts, runs an LLM eval in your voice (with identity guardrails), and drops drafted replies into Discord. Use when "reddit monitor", "reddit listener", "reddit outreach", "watch subreddits", "find reddit opportunities", "listen on reddit", "community listening", or any request to automate finding… - [Kai Sdr Reply Triage](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-sdr-reply-triage) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-sdr-reply-triage` > - [Open Brane](https://agentstack.voostack.com/l/mcp-cgallic-open-brane) — MCP server · Free — `agentstack add mcp-cgallic-open-brane` An event-log brain for people who keep losing context. One SQLite table, one write path, MCP for agents. - [Kai Case Study](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-case-study) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-case-study` Produce customer case studies from interviews or data — Problem, Solution, Results structure with perception engineering and quality gates. Use when "case study", "customer story", "testimonial", "success story", "client results", or any request to document a customer win. - [Content Brief](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-content-brief) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-content-brief` Generate a strategic content brief from format + site + keyword. Auto-resolves persona, pulls GSC data, generates hooks, angles, and competitor weakness via LLM. - [Email Sequence](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-email-sequence) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-email-sequence` Build email nurture flows using lifecycle marketing + perception engineering frameworks. Generates subject lines, body copy, and send timing. - [Kai Data Dashboard](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-data-dashboard) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-data-dashboard` Convert Kai workflow data, CSV exports, audit folders, SDR package outputs, and marketing reports into dashboard-ready specs or lightweight static dashboards. Use when "data dashboard", "operator dashboard", "operator room", "HTML operators room", "sales dashboard", "SDR dashboard", "turn this data into a dashboard", "dashboard handoff", "visualize Kai data", or any request to package sourced mar… - [Ad Copy](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-ad-copy) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-ad-copy` Write platform-compliant ad copy for Meta, Google, TikTok, LinkedIn, Pinterest, Snapchat, Amazon, or X. Loads TOS rules automatically. Shows char counts and format preview. - [Kai Gate](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-gate) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-gate` Run Kai CMO Harness quality gates on content. Scores Four U's (Unique/Useful/Ultra-specific/Urgent), checks for banned words and AI slop, runs SEO lint for search content. Use when "score this", "quality check", "run quality gates", "check this content", "four u's score", "banned word check", "SEO lint", or any request to validate content quality before publishing. - [Kai Brand Pulse](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-brand-pulse) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-brand-pulse` Multi-platform brand intelligence pulse - collect cited public reputation evidence across web, news, YouTube, X, LinkedIn, Reddit, and review sites, then turn it into objection mining, content angles, competitor positioning, and surround-sound actions. Use when "brand monitor", "brand pulse", "what are people saying about us", "multi-platform reputation", "brand intelligence", "weekly brand monit… - [Kai Email System](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-email-system) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-email-system` Plan and batch-produce an entire email system for a product. Maps every lifecycle touchpoint (onboarding, activation, conversion, retention, transactional, win-back), generates all emails with quality gates, outputs Loops-ready copy. Use when "create all emails", "email system", "build email sequences", "lifecycle emails", "onboarding sequence", "set up transactional emails", "plan all the emails… - [Kai Marketing](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-cmo-harness) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-cmo-harness` Marketing team as slash commands. Current Kai inventory: 48 skill directories, 45 canonical kai-* skill docs, 42 public /kai router commands, 54 playbook docs, 36 checklists, 27 framework docs, 26 channel guides, and 8 audience persona profiles. Full marketing ops from brief to gate. - [Kai Product Maker](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-product-maker) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-product-maker` Build a Gumroad-ready digital product from scratch — ebook, card deck, playbook, Notion template, or flipbook. Walks from concept → content outline → design brief → per-item markdown → images → multi-format build (PDF, HTML flipbook, Notion, card deck) → Gumroad sales page + email blast + launch assets. Use when "make a digital product", "build an ebook", "create a playbook", "card deck", "notion… - [Kai Content Calendar](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-content-calendar) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-content-calendar` Plan and produce a content calendar — a month (or quarter) of blog posts, LinkedIn articles, and SEO content mapped to business goals, personas, and keywords. Generates briefs for each piece, optionally batch-produces all content with quality gates. Use when "content calendar", "plan blog content", "monthly content", "quarterly content plan", "what should we publish", "content strategy", "editori… - [Kai Monthly Audit](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-monthly-audit) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-monthly-audit` Monthly marketing audit and executive review. Pulls the last 30 days of source-backed marketing, analytics, SEO, CRO, content, paid media, lifecycle, reputation, and pipeline data; compares it to the previous period; summarizes strategic learning; and produces an executive report plus next-month plan. Use when "monthly audit", "monthly marketing review", "monthly report", "executive marketing rev… - [Kai Cro](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-cro) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-cro` Conversion rate optimization audit — analyze a landing page, signup flow, or checkout funnel using the 5-layer CRO stack (technical performance, traffic quality, offer/pricing, design/layout, copy/messaging). Produces prioritized fix list with expected impact. Use when "CRO audit", "conversion audit", "why isn't this converting", "improve conversion rate", "landing page not converting", "optimize… - [Kai Launch](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-launch) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-launch` Plan and produce a complete product launch marketing package — landing page copy, email sequences, ad campaigns, press release, social posts, and launch timeline. Orchestrates all other kai skills into a coordinated launch. Use when "product launch", "launch campaign", "go-to-market", "GTM plan", "launch marketing", "we're launching", "prepare launch materials", or any request to coordinate marke… - [Kai Growth Hacker](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-growth-hacker) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-growth-hacker` Build an exhaustive first-growth-hire distribution operating system across B2B and B2C channels: LinkedIn, events, AI outbound, AEO, blogs, long-form writing, YouTube, webinars, X, influencers, AI UGC, organic TikTok, paid social, sponsorships, partnerships, lifecycle, referral, and community. Use when "growth hacker", "first growth hire", "distribution hire", "cover every channel", "channel hack… - [Kai Landing Page](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-landing-page) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-landing-page` Produce complete landing page copy using perception engineering and conversion frameworks. Generates hero section, value props, social proof blocks, objection handlers, and CTA — all scored against quality gates. Use when "landing page", "sales page", "LP copy", "write a landing page", "hero section", "conversion page", "signup page", or any request to produce persuasive page copy that converts v… - [Kai Retention](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-retention) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-retention` Customer retention system — churn analysis, retention tactics, loyalty programs, and engagement scoring. Use when "retention", "reduce churn", "keep customers", "loyalty program", "customer retention", "churn prevention", "churn analysis", "engagement scoring", "win-back", "customer lifetime value", or any request to analyze, prevent, or reduce customer churn. - [Kai Competitors](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-competitors) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-competitors` Competitive intelligence teardown — 5-layer analysis (signals, product, marketing, positioning, strategy) plus sales battlecard. Use when "competitor analysis", "competitive teardown", "who are our competitors", "battlecard", "competitive intel", "compare us to X", "what is X doing", or any request to research, analyze, or position against competitors. - [Kai Abm](https://agentstack.voostack.com/l/skill-cgallic-kai-cmo-harness-kai-abm) — Skill · Free · security-reviewed — `agentstack add skill-cgallic-kai-cmo-harness-kai-abm` Plan and execute account-based marketing campaigns for enterprise targets — account selection, personalized outreach, multi-channel touch sequences, and deal acceleration. Use when "ABM", "account-based marketing", "enterprise marketing", "target accounts", "named accounts", "enterprise outreach", "key accounts", or any request to build personalized campaigns for specific companies. --- Seller on AgentStack — the marketplace for AI agent skills and MCP servers. Every listing is security-reviewed. Install any with `agentstack add `.