Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add inkeep/open-knowledge-skills --skill worldbuildinggit clone --depth 1 https://github.com/inkeep/open-knowledge-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/inkeep/open-knowledge-skills/worldbuilding)<a href="https://agentmods.dev/skills/inkeep/open-knowledge-skills/worldbuilding"><img src="https://agentmods.dev/badge/skills/inkeep/open-knowledge-skills/worldbuilding/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/inkeep/open-knowledge-skills/worldbuilding"><img src="https://agentmods.dev/badge/skills/inkeep/open-knowledge-skills/worldbuilding.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00107 | $0.00675 |
| Opus 5.5 | $0.00043 | $0.00270 |
| Sonnet 5.5 | $0.00021 | $0.00135 |
| Haiku 4.5 | $0.00011 | $0.00068 |
Grade A, and why
worldbuilding scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 23d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 34 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Worldbuilding pack — how to work here
This project is a fiction encyclopedia. The graph is the product: characters, settings, themes, factions, and lore that link to each other. The agent's main jobs are auto-stubbing new entities as they're mentioned and flagging contradictions. This skill holds those behaviors so templates and folder descriptions stay clean.
This skill is pack guidance. The platform
/open-knowledgeskill (read/write/preview/linking/grounding rules) still governs every markdown operation — this layers the worldbuilding conventions on top.
Folders
characters/— one file per character (PC + NPC); frontmatter carries type, status, faction, first appearance.settings/— locations, regions, world-rules; frontmatter carries region, controlling faction, danger level. The "where" of the story.themes/— recurring narrative concerns (love, betrayal, identity). The "why." Themes work via opposition; each entry captures the theme and its tension.factions/— political, social, criminal, magical, religious groups. Shipsfaction,political-faction, andreligiontemplates.lore/— history, mythology, cosmology, magic systems. Shipslore,magic-system, andhistorical-eventtemplates.
Agent behaviors (the core value)
- Auto-stub on mention. When a chapter, session log, or existing entry references a name not yet captured, stub a file in the right folder with backlinks to where it was mentioned.
- Flag contradictions. When a character's
faction(or any field) contradicts their actions in narrative, or a setting is described two ways, surface the conflict — in fiction a contradiction is itself a story-shaping detail worth noting, not silently "fixing." - Thread the graph. Link characters ↔ factions ↔ settings ↔ lore so each entry becomes a hub for everywhere it appears.
- Do NOT add TTRPG stat-block fields (
xp_awarded, etc.) — those belong in a future TTRPG variant.
Templates
Create with write({ document: { path, template: "<name>" } }). Templates carry only structure; section meaning is described here, not inside the document body.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 23d ago Changed b0bcc9ae7763
- 2mo ago First seen · 34 lines · 107 tokens per session scan A 84acdede0fcc
worldbuilding is a skill published in the GitHub repository inkeep/open-knowledge-skills (17 stars, last pushed 11d ago), licensed MIT. It adds 107 tokens to every session and 675 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
worldbuilding compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| worldbuildinginkeep/open-knowledge-skills | Skill | 17 | 11d ago | MIT | A | 107 | Claude Code, Codex |
| claude-md-improveranthropics/claude-plugins-official | Skill | 46k | yesterday | Apache-2.0 | A | 82 | Claude Code |
| agent-platform-model-registrygoogle/skills | Skill | 22k | yesterday | Apache-2.0 | A | 60 | Claude Code, Codex |
| gke-reliabilitygoogle/skills | Skill | 22k | yesterday | Apache-2.0 | A | 85 | Claude Code, Codex |
| gke-workload-securitygoogle/skills | Skill | 22k | yesterday | Apache-2.0 | A | 171 | Claude Code, Codex |
| google-cloud-solution-agentic-analytics-spark-knowledge-cataloggoogle/skills | Skill | 22k | yesterday | Apache-2.0 | A | 132 | Claude Code, Codex |
| glance-canonical-layoutsandroid/skills | Skill | 10k | yesterday | Apache-2.0 | A | 56 | Claude Code |