COG Second Brain plugin for Grok Build
Self-evolving second brain with 35 AI skills, 10 agents, and people CRM. Closed-loop harness: a V-model verification lifecycle where the worker never grades its own homework. Plus paired anti-slop design skills for marketing and product UI. Works with Claude Code, Cursor, Kiro, Gemini CLI, Codex.
How to install COG Second Brain in Grok Build
grok plugin install huytieu/COG-second-brain --trustReview before you trust it. --trust lets this plugin's hooks, MCP servers and scripts run code on your computer. It's a community repo that neither xAI nor GrokStacks has reviewed, so read its code first.
Then start a new Grok session, or press r in /plugins, to load it.
Command format: Grok Build's plugin guide
What we checked: on Oct 18, 2026 it installed with grok 1.0.62 and Grok found 36 skills. That's an install check only: we haven't run it in a live Grok session.
What it contains
Skills (25)
auto-research— Deep strategic research engine — decomposes questions into parallel research threads, spawns multiple agents, and synthesizes into actionable strategic analysisbraindump— Quick capture of raw thoughts with intelligent domain classification and competitive intelligence extractionclosed-loop— Run one task through the V-model verification loop: CP-2 plan → CP-3 build → CP-3v component verify → CP-4 integration verify (full lane) → CP-5 acceptance. The worker never grades its own homework; evidence rows trace back to AC-n. Opt-in:comprehensive-analysis— Deep-dive 7-day analysis across all data sources for weekly reviews, board prep, and strategic planningcontent-factory— Autonomous content pipeline - scout announcements in your field, triage by trend momentum and personal angle, produce posts/blogs/videos in your voice with ledger-based dedup, hard volume caps, and screenshot-verified publishingcreate-user-story— Create user stories with duplicate checking across any project tracker (Linear, GitHub Issues, Jira)daily-brief— Generate personalized news intelligence with verified sources (7-day freshness requirement)daily-journal— A passive daily work journal that Claude keeps FOR you so you never have to write it yourself. Append short entries after meaningful work (what was done, what you focused on, artifacts touched) to 01-daily/journal/YYYY-MM-DD.md. Run a guidedata-forms— Pick the right way to represent a dataset so a reader gets the finding in three seconds — a catalog of 20+ chart and diagram forms with when-to-use and failure modes, plus the encoding decisions that make any of them readable (takeaway headeditorial-illustrations— Generate meaning-carrying editorial data-illustrations in the monotykamary / Linear aesthetic (near-black grayscale, Inter display + mono labels, hairline framed figures) with a single coral accent. This is a GENERATIVE GUIDE, not a templatexport-open-issues— Audit and export open issues from any project tracker with summary analysis and vault archivalgenerate-prd— Generate product requirements documents with optional publishing to Confluence or other wiki platformsgenerate-release-notes— Generate categorized release notes from any source (GitHub, Linear, Jira, or manual input) with optional publishingharvest— Capture durable session learnings, stage for human promotion to 05-knowledge/lizard, and propose skill/CLAUDE.md patches. Triggered by /harvest, SessionEnd hook staging, or nightly enhance. Never writes durable knowledge without your approvknowledge-consolidation— Build frameworks from scattered insights across all braindumps and notesloop-engineering— Shared loop-engineering reference for COG skills - the agent loop, deterministic verifiers, termination conditions, in-loop context management, and named patterns. Invoke when designing or debugging a skill that iterates (search-verify-retrmeeting-transcript— Process meeting recordings and notes into structured decisions, action items, and team dynamics with intelligent noise filteringmemory-hygiene— Periodic trust sweep of persistent memory and durable knowledge notes - re-verifies environment-dependent claims against the live environment, stamps last_verified + confidence, and proposes archiving drifted entriesmuseum-art— Source authentic, high-res PUBLIC-DOMAIN artwork from museum open-access APIs (Met, Cleveland, SMK, Rijksmuseum, NGA, Art Institute of Chicago, Getty, Smithsonian) instead of AI-generated or generic-stock imagery. The default move wheneverno-ai-slop— Edit drafts into sharper, more human writing while preserving the writer's personal voice, or detect AI-slop patterns without rewriting. Use when the user wants a draft clearer, more direct, more opinionated, or less AI-sounding, or asks whonboarding— Personalize COG for your workflow - creates profile, interests, and watchlist files with guided setup (run this first!)product-ui-taste— Anti-slop skill for PRODUCT UI - dashboards, data tables, forms, multi-step flows, settings, list/detail, app shells. The agent reads the surface, budgets the frame first, and ships dense interfaces that are correct at every edge case (overpublish-to-confluence— Publish any markdown file from the vault to Confluence with format conversion and approval gaterelease-video— Turn a product release (the list of shipped items plus real screen recordings) into a motion recap video and one explained demo per feature, with sound effects tied to on-screen motion and a composed music bed. Deterministic HTML scenes renretro— CP-7 retrospective: audit checkpoints, evidence quality, action items, and harvest candidates. Closes the V-model cycle and feeds the next run. Use via /retro after ship, escalate, or significant session.
About this listing
COG Second Brain is a community plugin on GitHub by huytieu, written as a Claude Code plugin that Grok Build installs. We install-checked it in Grok; we haven't run it in a live session or reviewed its code. When we installed it, Grok found 25 skills. Its license is MIT. We checked commit 36ac9d78d66e. It's one of 143 listings in the Design category on GrokStacks.
Stacks Weekly: every new Grok Build and Codex plugin, every Tuesday.
One short email for GrokStacks and CodexStacks readers, with each new plugin's install line and what it ships. Subscribe and get the free starter list: 20 Grok Build plugins worth installing first.
You'll get a confirmation email first. Unsubscribe anytime.
COG Second Brain FAQ
How do I install COG Second Brain in Grok Build?
Run grok plugin install huytieu/COG-second-brain --trust. We install-checked this command in Grok Build. Then start a new Grok session, or press r in /plugins, to load it.
Is COG Second Brain an official Grok Build plugin?
No. COG Second Brain is a community plugin on GitHub by huytieu, not in xAI's official Grok Build marketplace. We checked that it installs and what Grok loads from it, but haven't run it in a live Grok session or reviewed its code.
What does COG Second Brain include?
According to what Grok loaded in our install check, COG Second Brain includes 25 skills: auto-research, braindump, closed-loop, comprehensive-analysis, content-factory, create-user-story….
Details
- Type
- Plugin
- Category
- Design
- Source
- Community Claude Code plugin, installs in Grok
- License
- MIT
- Author
- huytieu
- Version
- 3.15.0
- Keywords
- agent-loop, agent-plugins, agent-skills, agentic, ai-agents, claude-code, closed-loop, cursor, garry-tan, gbrain, gstack, knowledge-management
- Source repo
- https://github.com/huytieu/COG-second-brain
- Checked commit
36ac9d78d66e- Checked by GrokStacks
- Install-checked in Grok Build on Oct 18, 2026; not run in a live session
Something wrong or missing? Submit or improve this listing. Marketplace listings also refresh automatically every night.
For maintainers: badge and embeds
Maintain COG Second Brain? Add the badge; it links to this page.
Markdown
[](https://grokstacks.com/p/cog-second-brain/)HTML
<a href="https://grokstacks.com/p/cog-second-brain/"><img src="https://grokstacks.com/badge.svg" alt="Listed on GrokStacks" width="164" height="28"></a>Embed card (static HTML and inline CSS, no JavaScript). Preview:
<a href="https://grokstacks.com/p/cog-second-brain/" style="display:block;max-width:380px;box-sizing:border-box;padding:14px 16px;border:1px solid #2a2e3c;border-radius:12px;background:#0a0b0f;color:#e8eaf0;font:14px/1.45 -apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;text-decoration:none"><span style="display:block;font-size:16px;font-weight:700;color:#e8eaf0">COG Second Brain</span><span style="display:block;margin:2px 0 8px;font-size:12px;color:#9aa0b1">Community plugin for Grok Build · 25 skills</span><span style="display:block;margin:0 0 10px;color:#c9cdd8">Self-evolving second brain with 35 AI skills, 10 agents, and people CRM. Closed-loop harness: a V-model verification…</span><span style="font-size:12px;font-weight:600;color:#7c9cff">View on GrokStacks →</span></a>Markdown summary
**[COG Second Brain on GrokStacks](https://grokstacks.com/p/cog-second-brain/)**: Community plugin for Grok Build with 25 skills. Install: `grok plugin install huytieu/COG-second-brain --trust`More on badges, embeds and keeping your listing up to date: GrokStacks for plugin authors.
Also in Design
3dicon
One prompt in, a looping animated 3D icon out — with real transparency. A Claude Code skill.
3dviz Pro Max
Agent skill for creative 3D visualization: turn an idea into a Three.js/Blender scene worth exploring. Claude Code + Codex plugin, 223 recipes, 440 knowledge records, 22 proved kits, 37 runnable studies.
Adobe Premiere Pro MCP
Adobe Premiere Pro MCP. Tools for AI-driven video editing via MCP, for Codex, Claude, and other MCP clients.
Agent Sprite Forge
Agent Skill for generating 2D sprite sheets and map, transparent PNG frames, and animated GIFs from prompts.
Agent Storyboard
本地优先的 Agent 视频分镜工作台:让 Codex、Claude Code 通过 MCP 写分镜、生成图片/视频素材和配音,并自动回填。Local-first storyboard workbench for AI agents (Codex, Claude Code).
AI Business Skills
138 bilingual AI marketing skills (69 VN + 69 Global) for Claude Code, OpenCode, Codex, VS Code. Four role SOP packs — content, design, performance, leader ops — plus strategy, personal brand, AI avatar, dropshipping, design master, knowledge library. 4 regions (US/EU/SEA/LATAM) + Vietnam 2025-2026. Companion: opa-kit.