Plugin Ecosystem
Claude Code's plugin system supports community-built extensions. For detailed documentation:
- Ultimate Guide Section 8 - Plugin system, commands, installation
- claude-plugins.dev - 11,989 plugins, 63,065 skills indexed
- claudemarketplaces.com - Auto-scan GitHub for marketplace plugins
- agentskills.io - Open standard for agent skills (26+ platforms)
Notable skill packs:
- Superpowers: Complete software development methodology suite (262K stars, 23.4K forks as of 2026-07-27, up from 95K+ stars / 7.5K forks earlier; MIT). 7 context-aware skills covering the full development arc: spec elicitation through Socratic brainstorming, detailed implementation planning (2-5 min tasks with exact file paths), subagent-driven development with two-stage review (spec compliance then code quality), mandatory TDD enforcement (code written before a test gets deleted), code review, git worktree management, and branch lifecycle completion (merge/PR/discard decision). Skills trigger automatically based on context: no manual invocation needed. Install:
/plugin install superpowers@claude-plugins-official. Created by Jesse Vincent (Prime Radiant), MIT. Also supports Cursor, Codex, OpenCode, and Gemini CLI. - gstack: 6-skill workflow suite covering the full ship cycle: strategic product gate (
/plan-ceo-review), architecture review (/plan-eng-review), paranoid code review (/review), automated release (/ship), native browser QA (/browse), and retrospective (/retro). Created by Garry Tan (Y Combinator CEO). See Cognitive Mode Switching for the workflow pattern and adoption guide. Despite the/plan-ceo-reviewcommand name, this is a software engineering tool, not a business persona: for AI agents that actually simulate named executive roles (CFO, CMO, board of directors), see AI Executive Agents. - Ponytail: "Lazy senior dev" mode for AI agents. Before writing code, the agent stops at the first rung that holds: does this need to exist? → stdlib? → native platform feature? → installed dependency? → one line? → only then the minimum that works. Benchmarked at 80-94% less code, 47-77% lower cost, and 3-6x faster than an unconstrained agent across Haiku, Sonnet, and Opus (median of 10 runs, 5 tasks). Three intensity levels:
lite(suggest the lazier path, let the user pick),full(enforce the ladder, default),ultra(YAGNI extremist, challenges the requirement in the same response). Deliberate shortcuts are marked with aponytail:comment naming the ceiling and upgrade path;/ponytail-debtharvests them into a ledger so "later" stays visible. Four commands:/ponytail [lite|full|ultra|off],/ponytail-review(over-engineering review of current diff),/ponytail-audit(whole-repo scan),/ponytail-debt(shortcut ledger). Install:/plugin install ponytail@ponytail. MIT. Supports 13 agents: Claude Code, Codex, GitHub Copilot CLI, Gemini CLI, Antigravity CLI, OpenCode, pi, OpenClaw, Cursor, Windsurf, Cline, Kiro, and VS Code with the Codex extension. - fable-mode: Execution discipline skill for complex tasks, structured as a 4-step loop: (1) write a numbered stage map with expected outputs before touching anything, (2) delegate independent stages to parallel subagents where the runtime allows, (3) verify each stage with a check that can actually fail (tests, diffs, sources read, not self-assessment), (4) self-critique as a skeptical reviewer before delivery. Named after the Claude Fable model but works on any model; honest that it shapes procedure, not capability ceiling. Three variants:
fable-mode(inline on current model),fable-sonnet(pins a Sonnet subagent),fable-haiku(pins a Haiku subagent for cost-sensitive work). Includes 4 worked examples across domains (API null-path bug, mis-attributed research claim, SQL nulls silently dropped from an AVG, multi-session refactor with no done criteria), each showing exactly where the failable check catches what one-shot misses. Two operational rules worth noting: surface accumulated warnings at threshold 3 rather than one by one; anchor sed replacements on word boundaries to avoid corrupting compound words. Install: copy the skill directory to wherever your Claude environment loads skills from (no plugin registry entry yet). No license. 802 stars, 86 forks as of 2026-07-27 (was 477 stars, 54 forks at 5 days post-launch in June 2026).