COG Second Brain plugin for Grok Build

Community Claude Code plugin, installs in GrokPluginDesign

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 --trust
✓ Install-checked in Grok Buildchecked Oct 18, 2026

Review 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 analysis
  • braindump — Quick capture of raw thoughts with intelligent domain classification and competitive intelligence extraction
  • closed-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 planning
  • content-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 publishing
  • create-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 guide
  • data-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 head
  • editorial-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 templat
  • export-open-issues — Audit and export open issues from any project tracker with summary analysis and vault archival
  • generate-prd — Generate product requirements documents with optional publishing to Confluence or other wiki platforms
  • generate-release-notes — Generate categorized release notes from any source (GitHub, Linear, Jira, or manual input) with optional publishing
  • harvest — 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 approv
  • knowledge-consolidation — Build frameworks from scattered insights across all braindumps and notes
  • loop-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-retr
  • meeting-transcript — Process meeting recordings and notes into structured decisions, action items, and team dynamics with intelligent noise filtering
  • memory-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 entries
  • museum-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 whenever
  • no-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 wh
  • onboarding — 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 (over
  • publish-to-confluence — Publish any markdown file from the vault to Confluence with format conversion and approval gate
  • release-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 ren
  • retro — 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.

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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

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Listed on GrokStacks

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<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`

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