Using Agent Skills
addyosmani/agent-skills
Meta-skill for choosing which workflow skill fits the task at hand, plus always-on habits: surface assumptions, stop on confusion, push back, keep it simple and stay in scope.
Capture durable session learnings, stage for human promotion to 05-knowledge/lizard, and propose skill/CLAUDE.md patches.
Install Harvest
$ npx skills add huytieu/COG-second-brain --skill harvest -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install huytieu/COG-second-brain harvest --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/huytieu/COG-second-brain.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/harvest .claude/skills/harvest && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "harvest" agent skill from https://github.com/huytieu/COG-second-brain/tree/main/skills/harvest into .claude/skills/harvest/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harvest", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/huytieu/COG-second-brain/tree/main/skills/harvestType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add huytieu/COG-second-brain --skill harvest -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install huytieu/COG-second-brain harvest --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/huytieu/COG-second-brain.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/harvest .agents/skills/harvest && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "harvest" agent skill from https://github.com/huytieu/COG-second-brain/tree/main/skills/harvest into .agents/skills/harvest/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harvest", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add huytieu/COG-second-brain --skill harvest -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install huytieu/COG-second-brain harvest --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/huytieu/COG-second-brain.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/harvest .cursor/skills/harvest && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "harvest" agent skill from https://github.com/huytieu/COG-second-brain/tree/main/skills/harvest into .cursor/skills/harvest/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harvest", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/huytieu/COG-second-brain.git --path skills/harvest--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add huytieu/COG-second-brain --skill harvest -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install huytieu/COG-second-brain harvest --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/huytieu/COG-second-brain.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/harvest .gemini/skills/harvest && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "harvest" agent skill from https://github.com/huytieu/COG-second-brain/tree/main/skills/harvest into .gemini/skills/harvest/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harvest", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install huytieu/COG-second-brain harvestInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add huytieu/COG-second-brain --skill harvest -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/huytieu/COG-second-brain.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/harvest .github/skills/harvest && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "harvest" agent skill from https://github.com/huytieu/COG-second-brain/tree/main/skills/harvest into .github/skills/harvest/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harvest", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add huytieu/COG-second-brain --skill harvest -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install huytieu/COG-second-brain harvest --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/huytieu/COG-second-brain.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/harvest .opencode/skills/harvest && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "harvest" agent skill from https://github.com/huytieu/COG-second-brain/tree/main/skills/harvest into .opencode/skills/harvest/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "harvest", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
harvest- GitHub stars
- 1.3k
- Token cost
- ~609 tokens
- SKILL.md length
- 215 words
- Files
- 1
- Skills in repo
- 37
- Repo updated
- First seen
- Licence
- MIT
At a glance
Capture durable session learnings, stage for human promotion to 05-knowledge/lizard, and propose skill/CLAUDE.md patches.
- Works in 3 steps: Collect (automatic or manual) → Curate (/harvest promote) → Retro line
- Tasks that involve Agent instruction files
- SKILL.md covers Triggers, Phase 1 — Collect (automatic…, Phase 2 — Curate (/harvest… and Phase 3 — Retro line, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Harvest is an agent skill from huytieu/COG-second-brain. 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.
Its SKILL.md is about 610 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Agent Workflows, covering Agent instruction files. The repository describes itself as: 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… The licence is MIT.
When your agent uses it
- Tasks that involve Agent instruction files
Example prompts
- “/harvest”
Workflow steps
3 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit 36ac9d7. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are markdown).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Harvest loads about 609 tokens when it runs. Until then it costs about 63 tokens; SKILL.md has 215 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from huytieu/COG-second-brain at commit 36ac9d7, republished under its MIT licence (© huytieu). 215 words, ~609 tokens.
Download SKILL.mdSave it as
.claude/skills/harvest/SKILL.md (or your agent's skills folder).- name
- harvest
- description
- 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.
/harvest — session learning capture
Adapted from dwarves-kit harvest hook + vault lizard pipeline. Prevents tacit knowledge dying in the transcript.
Triggers
/harvest— manual end-of-session/harvest promote— curate staging → lizard drafts (uses harvest-curator)- Staging file written by
stophook (.cursor/hooks/harvest-stager.sh)
Phase 1 — Collect (automatic or manual)
Scan the current session for:
- Corrections you made ("no, actually X", rejected deliverables)
- New stable facts (IDs, URLs, decisions) not yet in 05-knowledge
- Process lessons (what worked, what failed, friction)
- Skill gaps (something that should be a Verify step or CLAUDE.md rule)
Append to 04-projects/harness/harvest/staging-<YYYY-MM-DD>.md:
## <HH:MM> — <trigger>
- type: correction|fact|process|skill-gap
- source: <file or "session">
- text: <one paragraph max>
- proposed_home: <path or "new lizard note">Dedup: skip if same fact already in staging today or in 05-knowledge.
Phase 2 — Curate (/harvest promote)
Spawn harvest-curator (Sonnet). It writes /tmp/harvest-curate-<date>.md.
Lead (Opus) presents to the user:
- Promote list → approve which become
05-knowledge/lizard/YYYY-MM-DD-<slug>.md - Fold list → approve inline edits to existing notes
- Skill patches → approve CLAUDE.md / SKILL.md diffs
Only after approval: write durable files. Update 05-knowledge/lizard/index.md.
Phase 3 — Retro line
One line to 01-daily/journal/<today>.md:
Harvest: <n> staged, <m> promoted, <k> foldedRules
- Harvest is advisory. It never auto-writes 05-knowledge.
- Contradictions with existing knowledge → flag both, ask the user.
- Pair with
/memory-hygienemonthly for environment-dependent facts in~/.claude/.../memory/.
Nightly enhance (optional)
If you want harvest to run unattended, schedule a job that invokes the skills in this order. There is nothing to install first, since COG ships no hooks.
/memory-hygiene
/harvest promote # only if the staging file is non-empty
/content-factory # only if scheduled© huytieu, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in skills/harvest of huytieu/COG-second-brain.
Open the folder on GitHubat commit 36ac9d7
Compare with similar skills
Harvest next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Harvest this skillhuytieu/COG-second-brain | 1.3k | — | ~609 | Automated safety check: Pass | MIT | |
| Using Agent Skillsaddyosmani/agent-skills | 105k | 4 repos | ~2.4k | Automated safety check: Pass | MIT | |
| Claude ReflectBayramAnnakov/claude-reflect | 1.8k | 2 repos | ~627 | Automated safety check: Pass | MIT | |
| Writing For Agentsbestofjs/bestofjs | 3.1k | 20 repos | ~2.7k | Automated safety check: Pass | MIT | |
| Neat-Freak Knowledge CloseoutKKKKhazix/khazix-skills | 21k | — | ~1.9k | Automated safety check: Pass | MIT | |
| Task Observerrebelytics/one-skill-to-rule-them-all | 3.2k | 1 repos | ~11k | Automated safety check: Pass | CC-BY-4.0 |
Similar skills
Claude Reflect
BayramAnnakov/claude-reflect
Self-learning system that captures corrections during sessions and reminds users to run /reflect to update CLAUDE.md.
Writing For Agents
bestofjs/bestofjs
Writing documents for agents. An agent skill from bestofjs/bestofjs.
Neat-Freak Knowledge Closeout
KKKKhazix/khazix-skills
Brings project docs, agent rule files, authorized memory and leftover workspace files back in line with what the code and runtime actually do at the end of a work session.
Task Observer
rebelytics/one-skill-to-rule-them-all
Monitors task execution for skill improvement opportunities.
- Official
SkillOpt Sleep Cycle
microsoft/SkillOpt
Runs an on-demand or nightly sleep cycle that reviews past Claude Code sessions and proposes validated updates to CLAUDE.md and skills.
More from huytieu/COG-second-brain
All 37 skills in this repoVoice Baseline
huytieu/COG-second-brain
Measure your own writing corpus for the words and sentence shapes you over-use, so an agent writing in your voice stops amplifying your tics into a style.
Daily Journal
huytieu/COG-second-brain
A passive daily work journal that Claude keeps FOR you so you never have to write it yourself.
Editorial Illustrations
huytieu/COG-second-brain
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.
Loop Engineering
huytieu/COG-second-brain
Shared loop-engineering reference for COG skills - the agent loop, deterministic verifiers, termination conditions, in-loop context management, and named patterns.
Release Video
huytieu/COG-second-brain
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…
Onboarding
huytieu/COG-second-brain
Personalize COG for your workflow - creates profile, interests, and watchlist files with guided setup (run this first!)
Related
Categories
Questions about Harvest
What does Harvest do?
Capture durable session learnings, stage for human promotion to 05-knowledge/lizard, and propose skill/CLAUDE.md patches. Harvest is an agent skill from huytieu/COG-second-brain.md patches.
When should I use Harvest?
Harvest fits situations like: tasks that involve Agent instruction files.
How do I install Harvest in Claude Code?
Run `npx skills add huytieu/COG-second-brain --skill harvest -a claude-code`. Or copy the skill folder (skills/harvest in huytieu/COG-second-brain) into .claude/skills/harvest in your project. Claude Code loads it when a task matches its description.
How do I install Harvest in Codex?
Run `npx skills add huytieu/COG-second-brain --skill harvest -a codex`. Or copy the skill folder (skills/harvest in huytieu/COG-second-brain) into .agents/skills/harvest in your project. Codex loads it when a task matches its description.
Can I use Harvest in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add huytieu/COG-second-brain --skill harvest -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/harvest, .gemini/skills/harvest, .github/skills/harvest and .opencode/skills/harvest in your project.
What does Harvest need to run?
SKILL.md names no scripts, command-line tools or credentials: Harvest is instructions for the agent only.
Does Harvest access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Harvest safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Harvest use?
Harvest is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Harvest use?
About 609 tokens (SKILL.md is roughly 2.4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Harvest?
Skills that share tags, products or a category with Harvest: Using Agent Skills (addyosmani/agent-skills, 105k stars), Claude Reflect (BayramAnnakov/claude-reflect, 1.8k stars), Writing For Agents (bestofjs/bestofjs, 3.1k stars) and Neat-Freak Knowledge Closeout (KKKKhazix/khazix-skills, 21k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Harvest?
huytieu (a GitHub user) maintains it in huytieu/COG-second-brain, which has 1,268 GitHub stars. The repository holds 37 skills in this directory. The repository was last updated on October 2, 2026.
Source: huytieu/COG-second-brain on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.