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Community-maintained cybersecurity skill library: 800+ skills across 34 domains including threat hunting, incident forensics, penetration testing and cloud security, mapped to MITRE ATT&CK and NIST CSF. Not by Anthropic; offensive skills are for authorized testing only.

Calls Codex from Claude Code for read-only or adversarial code reviews, or delegates tasks to Codex to run in the background. Maintained by OpenAI; needs a ChatGPT account (the free tier works) or an API key.

Tracks the hiring funnel through sourcing, screening, interviews, debrief and offer, watching stage time and conversion, source effectiveness, offer acceptance and time to hire. With an ATS connected it pulls candidate data and updates status. A brief skill from Anthropic's human-resources plugin.

Helps in-house legal score and rank risks in contracts, deals and disputes on a severity-by-likelihood matrix, write risk memos, and know when to escalate to senior or outside counsel. No other tools needed. From Anthropic's legal plugin; not legal advice, have a lawyer review.

Drafts offer letters from role, level, location and comp package, listing base salary, equity, signing bonus and first-year total, plus talking points for the hiring manager's negotiation. The template follows US company conventions; have legal review before sending. Official from Anthropic.

Guides you through creating a plugin from scratch or customizing an existing plugin's connectors, skills and settings for your team's tools and workflows, producing an installable plugin package. Maintained by Anthropic; runs in Cowork mode in the Claude desktop app.

Quickly pre-screens incoming NDAs and sorts them green, yellow or red into standard approval, legal review or full review, focusing on non-competes, non-solicitation and missing carve-outs. Part of Anthropic's official legal plugin.

Anthropic's official knowledge work plugin: manages tasks in TASKS.md, remembers colleagues, projects and internal jargon with two-tier memory, and generates a local dashboard. Can sync to-dos with calendar, email and chat tools.

Creates, updates or reprioritizes a product roadmap: decides what moves when new work comes in, shifts timelines after dependency slips, or builds a Now/Next/Later view from scratch. Reads existing items from your project management tool when connected. From Anthropic's product-management plugin.

Anthropic's official knowledge work plugin: one question searches your connected chat, email, cloud docs, wiki and project tools at once and returns a sourced answer; can also produce daily or weekly digests. Preset MCP connectors for Slack, Notion, Atlassian, Asana and more, each needing auth.

Compensation analysis for HR and managers: market pay percentiles by role, level and location, offer competitiveness checks and equity modeling; upload a pay sheet to find employees outside their band and flight risks. Without a comp data source it uses public web data, so verify. By Anthropic.

Apollo.io's official plugin: describe your ideal customer profile in plain language to find prospects, enrich contacts with emails, phone numbers and company data, and bulk-add them to outreach sequences. Connects to Apollo's remote MCP; needs an Apollo account, and enrichment uses credits.

Builds onboarding plans for new hires: a pre-start checklist (accounts, equipment, buddy), day-one and first-week schedules, and 30/60/90-day goals. Works in plain chat; with an HRIS, knowledge base or calendar connected it pulls in team info and books day-one events. Official from Anthropic.

HR plugin: drafts offer letters, generates onboarding checklists, runs performance reviews, answers policy questions, and produces compensation benchmarks and people analytics reports. Can connect to HRIS and ATS systems. Official from Anthropic.

Makes social media routine for small business owners: keeps a rolling content calendar, learns the owner's voice before writing captions, adapts one image per platform, and waits for approval on each post. Image creation needs Canva; Shopify, HubSpot and Mailchimp are optional. By Anthropic.

Performance review season helper: generates self-review and manager review templates and calibration materials, summarizes rating distributions and promotion cases, and rewrites vague feedback into specific behavioral examples. Works in plain chat. Official from Anthropic.

Outreach skill from Anthropic's official sales plugin: uses account research and past emails to write personalized prospecting emails or multi-touch follow-up sequences, saved as drafts for your review. Works best with email and CRM connected; otherwise returns copy-ready text.

Builds structured interview kits for a role: behavioral and situational questions by competency, follow-up probes, a 1 to 4 scoring rubric and a debrief template, so interviewers assess candidates against the same bar. Part of Anthropic's official human-resources plugin.

Account research skill from Anthropic's official sales plugin: give a company name or domain (and optionally a contact) to get a company overview, recent news and likely priorities, an ICP fit check and existing CRM records. Without a CRM it uses uploaded lists or web search.

Writes stakeholder updates by audience and cadence: weekly or monthly reports, launch announcements or risk escalations, and can rewrite the same progress as an executive summary, an engineering deep dive or a customer-facing version. From Anthropic's official product-management plugin.

Anthropic's official business operations plugin: vendor evaluations, process docs (flowcharts, RACI, SOPs), change requests, capacity planning, status reports and runbooks. Works without external tools and does more with ITSM and project management tools connected.

Answers employee policy questions in plain language, such as PTO, benefits, expenses, travel and remote work, with sources cited. Paste the handbook into the chat, or connect Notion, Confluence or another knowledge base to search automatically, cutting repeat HR questions. Official from Anthropic.

Turns a feature idea or problem statement into a structured spec or PRD with goals and non-goals, user stories, success metrics and acceptance criteria, and can split large requests into phases. From Anthropic's official product-management plugin.

All-in-one plugin for small business owners: 44 skills covering cash flow and bookkeeping, collections and taxes, customer acquisition and marketing, customer feedback, inventory, hiring and contract review. Anything touching money or customers needs your approval. Official from Anthropic.