Updated 2w ago
by huytieu
COG-second-brain
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.
1.3k GitHub stars (1,283)
+61 in 20 days
| Period | New stars |
|---|---|
| Sep 27 | +1 |
| Sep 28 | +8 |
| Sep 29 | +12 |
| Sep 30 | +1 |
| Oct 1 | 0 |
| Oct 2 | +2 |
| Oct 3 | +5 |
| Oct 4 | +4 |
| Oct 5 | +1 |
| Oct 6 | −1 |
| Oct 7 | +5 |
| Oct 8 | +5 |
| Oct 9 | +1 |
| Oct 10 | +1 |
| Oct 11 | +5 |
| Oct 12 | +1 |
| Oct 13 | +2 |
| Oct 14 | +4 |
| Oct 15 | +4 |
| Oct 16 | 0 |
- 30 skills (30 skills found in its SKILL.md files)
- 157 forks (157 forks)
- 2w ago last update (Last updated 2w ago)
Install
Skills CLI
npx skills add huytieu/COG-second-brain
Asks which skills and agents to install. Just one: npx skills add huytieu/COG-second-brain --skill auto-research — add -g for every project.
Claude Code
git clone https://github.com/huytieu/COG-second-braincp -r "COG-second-brain/skills/auto-research" ~/.claude/skills/
Copies the auto-research skill into ~/.claude/skills/ for every project (use .claude/skills/ for one project). Repeat for the other skills listed below.
Plugin
/plugin marketplace add huytieu/COG-second-brain
Run inside Claude Code if the repository ships a plugin marketplace, then pick plugins from /plugin.
Skills can run code on your machine — read the SKILL.md first.
What it does
In the author's own words, from each skill's SKILL.md — showing the first 30 of 105 files.
-
auto-research
Deep strategic research engine — decomposes questions into parallel research threads, spawns multiple agents, and synthesizes into actionable strategic analysis
skills/auto-research/SKILL.md on GitHub (opens in a new tab) -
braindump
Quick capture of raw thoughts with intelligent domain classification and competitive intelligence extraction
skills/braindump/SKILL.md on GitHub (opens in a new tab) -
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: invoke with /closed-loop or by asking for the closed loop, proper verification, or an evidence trail. Ordinary work does not run this.
skills/closed-loop/SKILL.md on GitHub (opens in a new tab) -
comprehensive-analysis
Deep-dive 7-day analysis across all data sources for weekly reviews, board prep, and strategic planning
skills/comprehensive-analysis/SKILL.md on GitHub (opens in a new tab) -
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
skills/content-factory/SKILL.md on GitHub (opens in a new tab) -
create-user-story
Create user stories with duplicate checking across any project tracker (Linear, GitHub Issues, Jira)
skills/create-user-story/SKILL.md on GitHub (opens in a new tab) -
daily-brief
Generate personalized news intelligence with verified sources (7-day freshness requirement)
skills/daily-brief/SKILL.md on GitHub (opens in a new tab) -
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 guided reflection at night or in the morning. Use when you run /daily-journal, say "log this to my journal", "add to today's journal", "reflect on today/yesterday",…
skills/daily-journal/SKILL.md on GitHub (opens in a new tab) -
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 headline, direct labels, kill the axis, highlight-and-mute, show the caveat). Style-agnostic — use with whatever palette or design system the destination already h…
skills/data-forms/SKILL.md on GitHub (opens in a new tab) -
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 template gallery: it teaches the "claim -> geometry" method so any session can invent the RIGHT figure for what a post actually argues, then render it as a self-conta…
skills/editorial-illustrations/SKILL.md on GitHub (opens in a new tab) -
export-open-issues
Audit and export open issues from any project tracker with summary analysis and vault archival
skills/export-open-issues/SKILL.md on GitHub (opens in a new tab) -
generate-prd
Generate product requirements documents with optional publishing to Confluence or other wiki platforms
skills/generate-prd/SKILL.md on GitHub (opens in a new tab) -
generate-release-notes
Generate categorized release notes from any source (GitHub, Linear, Jira, or manual input) with optional publishing
skills/generate-release-notes/SKILL.md on GitHub (opens in a new tab) -
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 approval.
skills/harvest/SKILL.md on GitHub (opens in a new tab) -
knowledge-consolidation
Build frameworks from scattered insights across all braindumps and notes
skills/knowledge-consolidation/SKILL.md on GitHub (opens in a new tab) -
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-retry, scan-until-dry, fetch-retry-gate).
skills/loop-engineering/SKILL.md on GitHub (opens in a new tab) -
meeting-transcript
Process meeting recordings and notes into structured decisions, action items, and team dynamics with intelligent noise filtering
skills/meeting-transcript/SKILL.md on GitHub (opens in a new tab) -
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
skills/memory-hygiene/SKILL.md on GitHub (opens in a new tab) -
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 a visual needs an aesthetic, credible image (blog heroes, decks, social cards, essay/spec figures). Verified keyless recipes + licensing rules inside.
skills/museum-art/SKILL.md on GitHub (opens in a new tab) -
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 whether writing reads as AI.
skills/no-ai-slop/SKILL.md on GitHub (opens in a new tab) -
onboarding
Personalize COG for your workflow - creates profile, interests, and watchlist files with guided setup (run this first!)
skills/onboarding/SKILL.md on GitHub (opens in a new tab) -
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 (overflow, long labels, empty/error/loading states, i18n expansion, keyboard/a11y). House-system-first; maps to Carbon/Polaris/Atlaskit/Fluent/Primer/Material3/Radi…
skills/product-ui-taste/SKILL.md on GitHub (opens in a new tab) -
publish-to-confluence
Publish any markdown file from the vault to Confluence with format conversion and approval gate
skills/publish-to-confluence/SKILL.md on GitHub (opens in a new tab) -
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.
skills/retro/SKILL.md on GitHub (opens in a new tab) -
review-cockpit
Produce and continuously maintain ONE living review document for a multi-item session — a cockpit header (Progress checklist, Working folder, Context) plus per-item review cards that you approve or request changes on directly in the doc or side panel. Use whenever a session has multiple deliverables you need to review/approve (meeting-processing + planning, multi-ticket work, briefs with several…
skills/review-cockpit/SKILL.md on GitHub (opens in a new tab) -
scout
Evaluate URLs and tools — check vault coverage, assess relevance, recommend save or skip
skills/scout/SKILL.md on GitHub (opens in a new tab) -
slop-gate
Deterministic pre-publish scan that refuses AI-slop tells in anything about to be written, published, or sent: files, artifacts, slide titles, table headers, diagram labels, chat messages, commit messages. Use before publishing or sending any deliverable, in CI, or wired as a Claude Code hook so the check runs without being remembered. The editorial counterpart is no-ai-slop, which rewrites; this…
skills/slop-gate/SKILL.md on GitHub (opens in a new tab) -
taste-skill
Anti-slop frontend skill for landing pages, portfolios, and redesigns. The agent reads the brief, infers the right design direction, and ships interfaces that do not look templated. Real design systems when applicable, audit-first on redesigns, strict pre-flight check.
skills/taste-skill/SKILL.md on GitHub (opens in a new tab) -
team-brief
Generate daily team intelligence brief by cross-referencing GitHub, Linear, Slack, PostHog, meetings, and braindumps with two-way Linear sync-back
skills/team-brief/SKILL.md on GitHub (opens in a new tab) -
ultragoal
Run a large, multi-session goal (e.g. shipping a whole side product) through the full V-model closed loop, one phase at a time, with cross-session state and a final north-star acceptance gate. Ultragoals never downgrade the lane: every phase runs CP-1→CP-6 with adversarial verification. Opt-in: invoke with /ultragoal or by calling something a long-running goal. Ordinary work does not run this.
skills/ultragoal/SKILL.md on GitHub (opens in a new tab)
No skill matches that filter.
Review before you install
A skill is a set of instructions and scripts your agent will follow, and it can run code on your machine. Read the SKILL.md and any scripts first — this listing is not a security review.