Agent skill

Knowledge Base

by grandamenium in grandamenium/cortextos

You are about to research a topic, answer a factual question about the org, or look up context about a person, project, or tool.

MITAuto-check passedKnowledge Management

Install Knowledge Base

skills CLI

$ npx skills add grandamenium/cortextos --skill knowledge-base -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install grandamenium/cortextos knowledge-base --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/grandamenium/cortextos.git skills-src && mkdir -p .claude/skills && cp -r skills-src/community/skills/knowledge-base .claude/skills/knowledge-base && rm -rf skills-src

Use ~/.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/

Paste into Claude Code

Install the "knowledge-base" agent skill from https://github.com/grandamenium/cortextos/tree/main/community/skills/knowledge-base into .claude/skills/knowledge-base/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "knowledge-base", 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

$skill-installer install https://github.com/grandamenium/cortextos/tree/main/community/skills/knowledge-base

Type 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.

skills CLI

$ npx skills add grandamenium/cortextos --skill knowledge-base -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install grandamenium/cortextos knowledge-base --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/grandamenium/cortextos.git skills-src && mkdir -p .agents/skills && cp -r skills-src/community/skills/knowledge-base .agents/skills/knowledge-base && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "knowledge-base" agent skill from https://github.com/grandamenium/cortextos/tree/main/community/skills/knowledge-base into .agents/skills/knowledge-base/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "knowledge-base", 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.

skills CLI

$ npx skills add grandamenium/cortextos --skill knowledge-base -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install grandamenium/cortextos knowledge-base --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/grandamenium/cortextos.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/community/skills/knowledge-base .cursor/skills/knowledge-base && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "knowledge-base" agent skill from https://github.com/grandamenium/cortextos/tree/main/community/skills/knowledge-base into .cursor/skills/knowledge-base/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "knowledge-base", 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

$ gemini skills install https://github.com/grandamenium/cortextos.git --path community/skills/knowledge-base

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add grandamenium/cortextos --skill knowledge-base -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install grandamenium/cortextos knowledge-base --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/grandamenium/cortextos.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/community/skills/knowledge-base .gemini/skills/knowledge-base && rm -rf skills-src

Use ~/.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/

Paste into Gemini CLI

Install the "knowledge-base" agent skill from https://github.com/grandamenium/cortextos/tree/main/community/skills/knowledge-base into .gemini/skills/knowledge-base/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "knowledge-base", 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.

GitHub CLI

$ gh skill install grandamenium/cortextos knowledge-base

Installs 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).

skills CLI

$ npx skills add grandamenium/cortextos --skill knowledge-base -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/grandamenium/cortextos.git skills-src && mkdir -p .github/skills && cp -r skills-src/community/skills/knowledge-base .github/skills/knowledge-base && rm -rf skills-src

Use ~/.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/

Paste into GitHub Copilot

Install the "knowledge-base" agent skill from https://github.com/grandamenium/cortextos/tree/main/community/skills/knowledge-base into .github/skills/knowledge-base/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "knowledge-base", 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.

skills CLI

$ npx skills add grandamenium/cortextos --skill knowledge-base -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install grandamenium/cortextos knowledge-base --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/grandamenium/cortextos.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/community/skills/knowledge-base .opencode/skills/knowledge-base && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "knowledge-base" agent skill from https://github.com/grandamenium/cortextos/tree/main/community/skills/knowledge-base into .opencode/skills/knowledge-base/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "knowledge-base", 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: knowledge-base
GitHub stars: 101
Token cost: ~673 tokens
SKILL.md length: 124 words
Files: 1
Skills in repo: 55
Repo updated: Sep 23, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

You are about to research a topic, answer a factual question about the org, or look up context about a person, project, or tool.

Tasks that involve Knowledge bases
SKILL.md covers Query (before starting research), Ingest (after completing…, List Collections and Checking Available Collections, plus 1 more section
Needs GEMINI_API_KEY

What it does

Knowledge Base is an agent skill from grandamenium/cortextos. You are about to research a topic, answer a factual question about the org, or look up context about a person, project, or tool. Before searching the web or asking the user, query the knowledge base first — the answer may already exist from a previous research session. After you complete any substantial research, ingest your findings so future agents do not repeat the same work. The KB is the org's shared memory across all agents.

Its SKILL.md is about 670 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 Knowledge Management, covering Knowledge bases. The licence is MIT.

When your agent uses it

Tasks that involve Knowledge bases

Example prompts

“/knowledge-base”

Requirements

A credential in GEMINI_API_KEY

What it can do on your machine

Read from SKILL.md and the folder at commit 6f93838. 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 bash).
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 these keys or tokens, usually read from environment variables:
- GEMINI_API_KEY
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Knowledge Base loads about 673 tokens when it runs. Until then it costs about 112 tokens; SKILL.md has 124 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~112
When it runs · the whole SKILL.md, loaded when a task matches: ~673

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 grandamenium/cortextos at commit 6f93838, republished under its MIT licence (© grandamenium). 124 words, ~673 tokens.

Download SKILL.mdSave it as .claude/skills/knowledge-base/SKILL.md (or your agent's skills folder).

name: knowledge-base
description: You are about to research a topic, answer a factual question about the org, or look up context about a person, project, or tool. Before searching the web or asking the user, query the knowledge base first — the answer may already exist from a previous research session. After you complete any substantial research, ingest your findings so future agents do not repeat the same work. The KB is the org's shared memory across all agents.
triggers: knowledge base, kb, search knowledge, query knowledge, ingest, rag, semantic search, what do we know about, check knowledge, save to kb, index documents…
external_calls: generativelanguage.googleapis.com

Knowledge Base (RAG)

The knowledge base lets you search indexed documents using natural language — memory files, research notes, org knowledge. Query before searching externally. Ingest after completing research.

Query (before starting research)

bash

cortextos bus kb-query "your question" \
  --org $CTX_ORG \
  --agent $CTX_AGENT_NAME

Use this:

Before starting any research task — check if knowledge already exists
When referencing named entities (people, projects, tools) — check for existing context
When answering factual questions about the org — query before searching externally

Ingest (after completing research)

bash

# Ingest to shared org collection (visible to all agents)
cortextos bus kb-ingest /path/to/docs \
  --org $CTX_ORG \
  --scope shared

# Ingest to your private collection (only visible to you)
cortextos bus kb-ingest /path/to/docs \
  --org $CTX_ORG \
  --agent $CTX_AGENT_NAME \
  --scope private

Ingest after:

Completing substantive research (always ingest your findings)
Writing or updating MEMORY.md
Learning important facts about the org, users, or systems

List Collections

bash

cortextos bus kb-collections --org $CTX_ORG

Checking Available Collections

List all KB collections for the org:

bash

cortextos bus kb-collections --org $CTX_ORG

If no collections appear, the KB may not be configured yet — check that GEMINI_API_KEY is set in orgs/$CTX_ORG/secrets.env.

Workflow Pattern

1. User asks question about <topic>
2. kb-query "<topic>" — check existing knowledge
3. If found → answer from KB, cite source
4. If not found → research externally
5. After research → kb-ingest findings
6. Answer user with fresh knowledge now in KB

Files

Just SKILL.md in community/skills/knowledge-base of grandamenium/cortextos.

Open the folder on GitHubat commit 6f93838

Compare with similar skills

Knowledge Base 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.

Knowledge Base compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Knowledge Base this skillgrandamenium/cortextos	101	—	~673	Automated safety check: Pass	MIT	16 days ago
Capture Conversationoutline/outline	41k	—	~474	Automated safety check: Pass	Custom licence	today
Find And Citeoutline/outline	41k	—	~537	Automated safety check: Pass	Custom licence	today
Xhs Virtual Productchenjin-cmd/xhs-virtual-product	726	—	~862	Automated safety check: Pass	MIT	8 days ago
OpenkbVectifyAI/OpenKB	4.8k	1 repos	~2k	Automated safety check: Warn	Apache-2.0	2 mo ago
Learn From Materialsdmoshehun-prog/learn-from-materials	937	—	~7.9k	Automated safety check: Pass	MIT	2 days ago

Similar skills

Capture Conversation
outline/outline
Save the current conversation, a decision, or a set of notes as a document in an Outline collection; use when the user wants to keep what was discussed in their knowledge base.
41k GitHub stars~474 tokensUpdated today
Knowledge ManagementAuto-check passed
Find And Cite
outline/outline
Answer questions from the Outline knowledge base with quotes and links to the source documents; use when the user asks what the team knows, documented, or decided about a topic.
41k GitHub stars~537 tokensUpdated today
Knowledge ManagementAuto-check passed
Xhs Virtual Product
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This skill helps plan, select, produce, and market Xiaohongshu (RED) virtual/digital products — templates, knowledge bases, test tools, study materials.
726 GitHub stars~862 tokensUpdated 8 days ago
Knowledge ManagementAuto-check passed
Openkb
VectifyAI/OpenKB
A skill your agent uses when the user asks about content in their OpenKB knowledge base — research topics, concepts compiled from their documents, cross-document synthesis — or mentions openkb, an…
4.8k GitHub starsUsed in 1 repo~2k tokens
Knowledge ManagementAuto-check: warnings
Learn From Materials
dmoshehun-prog/learn-from-materials
Turns books, PDFs, slides and web pages into a source-grounded knowledge base and an interactive learning page in English or Chinese, with quizzes, relationship maps and reusable methodology notes.
937 GitHub stars~7.9k tokensUpdated 2 days ago
Knowledge ManagementAuto-check passed
Onyx CLI
onyx-dot-app/onyx
Query the Onyx knowledge base using the onyx-cli command. An agent skill from onyx-dot-app/onyx.
32k GitHub starsUsed in 1 repo~2.6k tokens
Knowledge ManagementAuto-check passed

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Questions about Knowledge Base

What does Knowledge Base do?

You are about to research a topic, answer a factual question about the org, or look up context about a person, project, or tool. Knowledge Base is an agent skill from grandamenium/cortextos. You are about to research a topic, answer a factual question about the org, or look up context about a person, project, or tool.

When should I use Knowledge Base?

Knowledge Base fits situations like: tasks that involve Knowledge bases.

How do I install Knowledge Base in Claude Code?

Run `npx skills add grandamenium/cortextos --skill knowledge-base -a claude-code`. Or copy the skill folder (community/skills/knowledge-base in grandamenium/cortextos) into .claude/skills/knowledge-base in your project. Claude Code loads it when a task matches its description.

How do I install Knowledge Base in Codex?

Run `npx skills add grandamenium/cortextos --skill knowledge-base -a codex`. Or copy the skill folder (community/skills/knowledge-base in grandamenium/cortextos) into .agents/skills/knowledge-base in your project. Codex loads it when a task matches its description.

Can I use Knowledge Base 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 grandamenium/cortextos --skill knowledge-base -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/knowledge-base, .gemini/skills/knowledge-base, .github/skills/knowledge-base and .opencode/skills/knowledge-base in your project.

What does Knowledge Base need to run?

Going by SKILL.md and its folder, Knowledge Base needs credentials named GEMINI_API_KEY. Our summary lists: A credential in GEMINI_API_KEY.

Does Knowledge Base 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 Knowledge Base 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 Knowledge Base use?

Knowledge Base 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 Knowledge Base use?

About 673 tokens (SKILL.md is roughly 2.7k 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 Knowledge Base?

Skills that share tags, products or a category with Knowledge Base: Capture Conversation (outline/outline, 41k stars), Find And Cite (outline/outline, 41k stars), Xhs Virtual Product (chenjin-cmd/xhs-virtual-product, 726 stars) and Openkb (VectifyAI/OpenKB, 4.8k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Knowledge Base?

grandamenium (a GitHub user) maintains it in grandamenium/cortextos, which has 101 GitHub stars. The repository holds 55 skills in this directory. The repository was last updated on September 23, 2026.

Source: grandamenium/cortextos on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Knowledge Base

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Knowledge Base (RAG)

Query (before starting research)

Ingest (after completing research)

List Collections

Checking Available Collections

Workflow Pattern

Files

Compare with similar skills

Similar skills

More from grandamenium/cortextos

Related

Questions about Knowledge Base