{"slug":"quantconnect-lean","name":"Lean","description":"Lean Algorithmic Trading Engine by QuantConnect (Python, C#)","tagline":"Lean Algorithmic Trading Engine by QuantConnect (Python, C#)","category":"finance","tags":["finance","trading-bot","automation","algorithm","algorithmic-trading-engine","c-sharp","forex","lean-engine","options","python"],"author":{"name":"QuantConnect","verified":true,"url":"https://github.com/QuantConnect"},"stats":{"stars":19820,"forks":4922,"downloads":0,"rating":0,"review_count":0,"quality_score":73.28},"quality":{"score":100,"tier":"excellent","label":"Excellent","summary":"High-confidence pick with strong adoption and healthy maintenance signals.","signals":[{"label":"GitHub stars","value":"20K","tone":"positive"},{"label":"Freshness","value":"Today","tone":"positive"},{"label":"Install ready","value":"Yes","tone":"positive"},{"label":"License","value":"Apache-2.0","tone":"neutral"}],"warnings":[]},"trust":{"score":100,"tier":"production","label":"Production candidate","summary":"Strong trust signals across adoption, maintenance, install readiness, and review status.","recommendedAction":"Shortlist for production use, then run a normal repository and dependency review.","checks":[{"status":"pass","label":"Ownership","detail":"Listing manually verified"},{"status":"pass","label":"Install path","detail":"npx skills add QuantConnect/Lean"},{"status":"pass","label":"Repository","detail":"https://github.com/QuantConnect/Lean"},{"status":"pass","label":"License","detail":"Apache-2.0"},{"status":"pass","label":"Maintenance","detail":"Pushed today"},{"status":"pass","label":"AI review","detail":"Approved with no listed issues"},{"status":"pass","label":"Adoption","detail":"20K GitHub stars"},{"status":"pass","label":"Documentation","detail":"Usable description available"},{"status":"info","label":"OpenAgentSkill usage","detail":"No local usage activity yet"}],"strengths":["Manually verified listing","AI review approved","Recently maintained repository","Large GitHub adoption signal"],"warnings":[]},"audit":{"audit_score":97,"risk_level":"safe_to_try","risk_label":"Safe to try","warnings":[]},"decision":{"readiness_score":100,"readiness_label":"Production-ready","headline":"Primary pick for Finance and quant","role":"Primary pick","primary_fit":"Finance and quant","best_for":["Finance and quant workflows","Claude Code teams","teams that value GitHub adoption signals"],"risks":["No OpenAgentSkill engagement data yet"],"next_steps":["Install it in a sandbox agent and run one Finance and quant task end to end.","Compare output quality, latency, and failure behavior against at least one alternative.","Promote it into production only after reviewing repository permissions, license, and maintenance signals."]},"platforms":["C#","Trading Bot","Claude Code"],"use_cases":[{"slug":"finance-quant","title":"Finance and quant","url":"https://www.openagentskill.com/use-cases/finance-quant"},{"slug":"coding-agents","title":"Coding agents","url":"https://www.openagentskill.com/use-cases/coding-agents"},{"slug":"rag-knowledge","title":"RAG and knowledge","url":"https://www.openagentskill.com/use-cases/rag-knowledge"},{"slug":"workflow-automation","title":"Workflow automation","url":"https://www.openagentskill.com/use-cases/workflow-automation"}],"install":"npx skills add QuantConnect/Lean","install_targets":[{"id":"openagentskill-cli","label":"CLI","title":"OpenAgentSkill CLI","kind":"command","value":"npx skills add QuantConnect/Lean","description":"Use the registry command when your workflow supports the OpenAgentSkill installer.","copyLabel":"Copy command"},{"id":"codex","label":"Codex","title":"Codex install prompt","kind":"agent-prompt","value":"Install the \"Lean\" agent skill from https://github.com/QuantConnect/Lean. Read its SKILL.md or equivalent instructions first, install only the files needed for this workspace, and summarize any required setup before using it. Skill purpose: Lean Algorithmic Trading Engine by QuantConnect (Python, C#)","description":"Give Codex a repo-aware install prompt when the skill is not available through a local CLI.","copyLabel":"Copy prompt"},{"id":"claude-code","label":"Claude Code","title":"Claude Code skill prompt","kind":"agent-prompt","value":"Add \"Lean\" as a Claude Code skill from https://github.com/QuantConnect/Lean. Inspect the skill instructions, place the reusable skill files in the appropriate local skills location for this project, and report the activation steps. Skill purpose: Lean Algorithmic Trading Engine by QuantConnect (Python, C#)","description":"Use this prompt to ask Claude Code to add the skill and explain the local activation steps.","copyLabel":"Copy prompt"},{"id":"cursor","label":"Cursor","title":"Cursor rule prompt","kind":"agent-prompt","value":"Turn \"Lean\" from https://github.com/QuantConnect/Lean into a reusable Cursor project rule or agent instruction. Preserve the core workflow, adapt paths to this repo, and keep the rule scoped to tasks where it is relevant. Skill purpose: Lean Algorithmic Trading Engine by QuantConnect (Python, C#)","description":"Use this when installing as Cursor project rules or reusable agent instructions.","copyLabel":"Copy prompt"}],"repository":"https://github.com/QuantConnect/Lean","github_repo":"QuantConnect/Lean","version":"1.0.0","license":"Apache-2.0","updated_at":"2026-06-12T02:49:48.621824+00:00","canonical_key":"quantconnect/lean","recommendation_reasons":["Strong GitHub adoption: 19,820 stars","Quality score 73/100","Install handoff is available","Repository freshness signal is available"],"urls":{"web":"https://www.openagentskill.com/skills/quantconnect-lean","api":"https://www.openagentskill.com/api/agent/skills/quantconnect-lean","install_api":"https://www.openagentskill.com/api/skills/quantconnect-lean/install","audit":"https://www.openagentskill.com/skills/quantconnect-lean/audit","repository":"https://github.com/QuantConnect/Lean"},"meta":{"endpoint":"/api/registry/manifest/{slug}","canonical_agent_endpoint":"/api/agent/skills/quantconnect-lean","agent_friendly":true,"api_version":"1.0","generated_at":"2026-06-12T06:31:44.988Z"}}