Agent skill

Wiki

Markdown-first knowledge base where the LLM acts as librarian.

MITAuto-check passedKnowledge Management

Install Wiki

skills CLI

$ npx skills add SethGammon/Citadel --skill wiki -a claude-code

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

GitHub CLI

$ gh skill install SethGammon/Citadel wiki --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/SethGammon/Citadel.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/wiki .claude/skills/wiki && 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 "wiki" agent skill from https://github.com/SethGammon/Citadel/tree/main/skills/wiki into .claude/skills/wiki/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wiki", 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/SethGammon/Citadel/tree/main/skills/wiki

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 SethGammon/Citadel --skill wiki -a codex

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

GitHub CLI

$ gh skill install SethGammon/Citadel wiki --agent codex

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

Manual copy

$ git clone --depth 1 https://github.com/SethGammon/Citadel.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/wiki .agents/skills/wiki && 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 "wiki" agent skill from https://github.com/SethGammon/Citadel/tree/main/skills/wiki into .agents/skills/wiki/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wiki", 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 SethGammon/Citadel --skill wiki -a cursor

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

GitHub CLI

$ gh skill install SethGammon/Citadel wiki --agent cursor

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

Manual copy

$ git clone --depth 1 https://github.com/SethGammon/Citadel.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/wiki .cursor/skills/wiki && 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 "wiki" agent skill from https://github.com/SethGammon/Citadel/tree/main/skills/wiki into .cursor/skills/wiki/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wiki", 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/SethGammon/Citadel.git --path skills/wiki

--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 SethGammon/Citadel --skill wiki -a gemini-cli

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

GitHub CLI

$ gh skill install SethGammon/Citadel wiki --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/SethGammon/Citadel.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/wiki .gemini/skills/wiki && 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 "wiki" agent skill from https://github.com/SethGammon/Citadel/tree/main/skills/wiki into .gemini/skills/wiki/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wiki", 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 SethGammon/Citadel wiki

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 SethGammon/Citadel --skill wiki -a github-copilot

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

Manual copy

$ git clone --depth 1 https://github.com/SethGammon/Citadel.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/wiki .github/skills/wiki && 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 "wiki" agent skill from https://github.com/SethGammon/Citadel/tree/main/skills/wiki into .github/skills/wiki/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wiki", 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 SethGammon/Citadel --skill wiki -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 SethGammon/Citadel wiki --agent opencode

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

Manual copy

$ git clone --depth 1 https://github.com/SethGammon/Citadel.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/wiki .opencode/skills/wiki && 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 "wiki" agent skill from https://github.com/SethGammon/Citadel/tree/main/skills/wiki into .opencode/skills/wiki/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "wiki", 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: wiki
GitHub stars: 922
Token cost: ~1.5k tokens
SKILL.md length: 656 words
Files: 1
Skills in repo: 48
Repo updated: Oct 1, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Markdown-first knowledge base where the LLM acts as librarian.

Works in 4 steps: Read wiki/index.md, identify 1-5… → Read those topics; follow… → Produce a clear answer citing specific… → …
Tasks that involve LLM wikis
SKILL.md covers Orientation, Directory Structure, Commands and Protocol, plus 4 more sections
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Wiki is an agent skill from SethGammon/Citadel. Markdown-first knowledge base where the LLM acts as librarian. Ingests raw sources, compiles and interlinks topic files, self-maintains an index. No vector DB or embeddings required -- uses LLM-native navigation over structured markdown up to ~400K words.

Its SKILL.md is about 1.5k 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 LLM wikis, Knowledge bases and Embeddings. The repository describes itself as: The operating layer for Claude Code + OpenAI Codex: persistent project memory, intent routing, safety hooks, cost telemetry, and parallel agent fleets. The licence is MIT.

When your agent uses it

Tasks that involve LLM wikis
Tasks that involve Knowledge bases
Tasks that involve Embeddings

Example prompts

“/wiki”

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

Read wiki/index.md, identify 1-5 relevant topic files, explain reasoning briefly
Read those topics; follow [[cross-links]] up to 2 hops if relevant
Produce a clear answer citing specific topic files used
If the wiki lacks enough information: state what it knows, list gaps, suggest /wiki --add for missing areas

What it can do on your machine

Read from SKILL.md and the folder at commit e41ff1d. 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.
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

Wiki loads about 1.5k tokens when it runs. Until then it costs about 65 tokens; SKILL.md has 656 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~65
When it runs · the whole SKILL.md, loaded when a task matches: ~1.5k

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 SethGammon/Citadel at commit e41ff1d, republished under its MIT licence (© SethGammon). 656 words, ~1,514 tokens.

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

name: wiki
description: Markdown-first knowledge base where the LLM acts as librarian. Ingests raw sources, compiles and interlinks topic files, self-maintains an index. No vector DB or embeddings required -- uses LLM-native navigation over structured markdown up to ~400K words.
license: MIT
user-invocable: true
auto-trigger: false
trigger_keywords: wiki, knowledge base, llm wiki, project wiki, build a wiki, maintain knowledge, knowledge management, llm-wiki, karpathy wiki
last-updated: 2026-04-06

/wiki -- LLM-Native Knowledge Base

Orientation

Use when: building and querying a markdown-first knowledge base -- ingests raw notes, deduplicates, surfaces answers. Don't use when: capturing session learnings into the evolve pipeline (use /learn); generating structured code documentation (use /doc-gen).

Directory Structure

text

wiki/
  index.md              # Master index
  raw/                  # Unprocessed sources (timestamped files)
  topics/               # Compiled topic files (one per topic, interlinked)
  .wiki-meta.json       # Stats: topic count, source count, last compaction

Commands

Command	Behavior
`/wiki`	Status overview: topic count, last update, pending raw sources
`/wiki --add [source]`	Ingest a new source into the wiki
`/wiki --query [question]`	Answer a question using wiki knowledge
`/wiki --status`	Detailed wiki health: topic count, staleness, orphan detection
`/wiki --compact`	Merge, deduplicate, and reorganize topics
`/wiki --rebuild-index`	Regenerate index.md from current topic files
`/wiki init [path]`	Initialize a new wiki at the specified path

Protocol

Command: `/wiki init [path]`

Create wiki/, wiki/raw/, wiki/topics/, an empty wiki/index.md, and wiki/.wiki-meta.json with fields: created, lastUpdated, topicCount: 0, sourceCount: 0, totalWords: 0, lastCompaction: null. Default path: wiki/ at project root.

Command: `/wiki --add [source]`

Ingest a new source into the wiki.

Step 1: Determine source type — URL (fetch with WebFetch), file path (read), raw text (use directly), no argument (ask user).

Step 2: Write raw content to wiki/raw/source-{timestamp}.md with header: title/URL, ingested date, type, original reference.

Step 3: Identify 1-5 topics. For each: check if a topic file already exists — append to existing or create wiki/topics/{slug}.md.

Step 4: Each topic file has: title, > Last updated, > Sources, compiled content, and ## Related Topics with [[slug]] cross-links. Scan existing topics for cross-links when writing.

Step 5: Regenerate wiki/index.md with stats header, Topics table ([[slug]] | summary | last updated), and Recent Sources table.

Step 6: Update wiki/.wiki-meta.json with new counts.

Step 7: Output: source description, topics created, topics updated, index counts.

Command: `/wiki --query [question]`

Read wiki/index.md, identify 1-5 relevant topic files, explain reasoning briefly
Read those topics; follow [[cross-links]] up to 2 hops if relevant
Produce a clear answer citing specific topic files used
If the wiki lacks enough information: state what it knows, list gaps, suggest /wiki --add for missing areas

Command: `/wiki --status`

Read meta, count topic files and raw sources, check for orphaned topics, broken cross-links, and stale topics (30+ days). Output: topic/source/word counts, last updated/compaction dates, and health issues with counts and lists.

Command: `/wiki --compact`

Read wiki/index.md and all topic files
Identify: merge candidates (overlapping subjects), split candidates (multiple distinct subjects), stale/outdated content, duplicates
For each change: describe what and why, make the change, update all affected cross-links
Rebuild wiki/index.md and update wiki/.wiki-meta.json with lastCompaction and new counts
Output: topics merged/split/removed/resolved, final count, estimated words

Show full SKILL.md (241 more words)Show less

Command: `/wiki --rebuild-index`

Read all topic files, extract title/summary/date, write a fresh wiki/index.md. Output: "Index rebuilt with {count} topics."

Fringe Cases

.planning/ does not exist: Run /do setup first to initialize the harness state directory.
No wiki directory: Prompt to run /wiki init. Do not auto-create on query or status.
Source >50K words: Split into sections, warn the user.
Topic name collision: Merge into existing topic, do not overwrite.
Empty wiki queried: "The wiki is empty. Add sources with /wiki --add."
Broken cross-link: During compaction/rebuild — flag. During --add — create stub [[missing-topic]] (stub -- needs content) if no context.
URL fetch fails: Report failure, suggest pasting content directly.
Wiki >~400K words: Warn during --status, suggest archiving or /wiki --compact.

Contextual Gates

Disclosure: "Updating wiki at .planning/wiki/. Files will be created or modified." Reversibility: amber — creates and modifies .planning/wiki/ files; undo by deleting or reverting changed files. Trust gates:

Any: all wiki commands (init, add, query, status, compact, rebuild-index).

Quality Gates

Every topic file must have a title, last-updated date, and sources list
Every topic file must have at least one cross-link to another topic (unless it is the only topic)
The index must accurately reflect all topic files (no orphans after --add or --compact)
No duplicate topic files (same slug = same file)
Raw sources are preserved in wiki/raw/ and never deleted
The --query command must cite specific topic files, not fabricate information

Exit Protocol

Output a summary appropriate to the command executed, then:

---HANDOFF---
- Wiki: {command executed} at {wiki path}
- Topics: {count} total, {new/updated/merged count} changed
- Status: {healthy | needs compaction | has orphans/broken links}
---

Files

Just SKILL.md in skills/wiki of SethGammon/Citadel.

Open the folder on GitHubat commit e41ff1d

Compare with similar skills

Wiki 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.

Wiki compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Wiki this skillSethGammon/Citadel	922	—	~1.5k	Automated safety check: Pass	MIT	6 days ago
LLM Wiki Knowledge GraphEgonex-AI/Understand-Anything	85k	1 repos	~1.5k	Automated safety check: Pass	MIT	yesterday
LLM Wikilewislulu/llm-wiki-skill	655	—	~3.7k	Automated safety check: Pass	None	5 mo ago
Wiki Builderrohitg00/pro-workflow	2.9k	—	~1k	Automated safety check: Pass	None	8 days ago
Arkon Editnduckmink/arkon	1.5k	—	~1.6k	Automated safety check: Pass	Custom licence	4 mo ago
Research Wiki Builderdair-ai/dair-academy-plugins	614	—	~1.3k	Automated safety check: Pass	MIT	2 mo ago

Similar skills

LLM Wiki Knowledge Graph
Egonex-AI/Understand-Anything
Detects a Karpathy-pattern LLM wiki and builds an interactive knowledge graph with entities, implicit relationships and topic clusters.
85k GitHub starsUsed in 1 repo~1.5k tokens
Knowledge ManagementAuto-check passed
LLM Wiki
lewislulu/llm-wiki-skill
Build and maintain a Karpathy-style LLM knowledge base — a self-compiling Obsidian markdown wiki where an Agent ingests raw sources, compiles cross-linked concept/entity/summary pages, answers…
655 GitHub stars~3.7k tokensUpdated 5 mo ago
Knowledge ManagementAuto-check passed
Wiki Builder
rohitg00/pro-workflow
Start, structure, and grow a persistent research wiki indexed in pro-workflow's SQLite knowledge base.
2.9k GitHub stars~1k tokensUpdated 8 days ago
Knowledge ManagementAuto-check passed
Arkon Edit
nduckmink/arkon
Propose or directly apply edits to Arkon wiki pages, including proposing brand new pages.
1.5k GitHub stars~1.6k tokensUpdated 4 mo ago
Knowledge ManagementAuto-check passed
Research Wiki Builder
dair-ai/dair-academy-plugins
Creates and maintains configurable research wikis: scaffold a folder, add sources, compile pages and indexes, and file query answers back.
614 GitHub stars~1.3k tokensUpdated 2 mo ago
Knowledge ManagementAuto-check passed
Arkon Query
nduckmink/arkon
Answer questions using the Arkon knowledge base. An agent skill from nduckmink/arkon.
1.5k GitHub stars~1k tokensUpdated 4 mo ago
Knowledge ManagementAuto-check passed

Questions about Wiki

What does Wiki do?

Markdown-first knowledge base where the LLM acts as librarian. Wiki is an agent skill from SethGammon/Citadel. Markdown-first knowledge base where the LLM acts as librarian.

When should I use Wiki?

Wiki fits situations like: tasks that involve LLM wikis; tasks that involve Knowledge bases; tasks that involve Embeddings.

How do I install Wiki in Claude Code?

Run `npx skills add SethGammon/Citadel --skill wiki -a claude-code`. Or copy the skill folder (skills/wiki in SethGammon/Citadel) into .claude/skills/wiki in your project. Claude Code loads it when a task matches its description.

How do I install Wiki in Codex?

Run `npx skills add SethGammon/Citadel --skill wiki -a codex`. Or copy the skill folder (skills/wiki in SethGammon/Citadel) into .agents/skills/wiki in your project. Codex loads it when a task matches its description.

Can I use Wiki 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 SethGammon/Citadel --skill wiki -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/wiki, .gemini/skills/wiki, .github/skills/wiki and .opencode/skills/wiki in your project.

What does Wiki need to run?

SKILL.md names no scripts, command-line tools or credentials: Wiki is instructions for the agent only.

Does Wiki 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 Wiki 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 Wiki use?

Wiki is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Wiki use?

About 1.5k tokens (SKILL.md is roughly 6.1k 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 Wiki?

Skills that share tags, products or a category with Wiki: LLM Wiki Knowledge Graph (Egonex-AI/Understand-Anything, 85k stars), LLM Wiki (lewislulu/llm-wiki-skill, 655 stars), Wiki Builder (rohitg00/pro-workflow, 2.9k stars) and Arkon Edit (nduckmink/arkon, 1.5k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Wiki?

SethGammon (a GitHub user) maintains it in SethGammon/Citadel, which has 922 GitHub stars. The repository holds 48 skills in this directory. The repository was last updated on October 1, 2026.

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

Install Wiki

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

/wiki -- LLM-Native Knowledge Base

Orientation

Directory Structure

Commands

Protocol

Command: /wiki init [path]

Command: /wiki --add [source]

Command: /wiki --query [question]

Command: /wiki --status

Command: /wiki --compact

Command: /wiki --rebuild-index

Fringe Cases

Contextual Gates

Quality Gates

Exit Protocol

Files

Compare with similar skills

Similar skills

More from SethGammon/Citadel

Related

Questions about Wiki

Command: `/wiki init [path]`

Command: `/wiki --add [source]`

Command: `/wiki --query [question]`

Command: `/wiki --status`

Command: `/wiki --compact`

Command: `/wiki --rebuild-index`