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 Firstp1ck/pi-coding-agent-forge --skill writer-worldbuildinggit clone --depth 1 https://github.com/Firstp1ck/pi-coding-agent-forgeWrote 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/firstp1ck/pi-coding-agent-forge/writer-worldbuilding)<a href="https://agentmods.dev/skills/firstp1ck/pi-coding-agent-forge/writer-worldbuilding"><img src="https://agentmods.dev/badge/skills/firstp1ck/pi-coding-agent-forge/writer-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/firstp1ck/pi-coding-agent-forge/writer-worldbuilding"><img src="https://agentmods.dev/badge/skills/firstp1ck/pi-coding-agent-forge/writer-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 | $0.00026 | $0.00349 |
| Opus 5.5 | $0.00010 | $0.00140 |
| Sonnet 5.5 | $0.00005 | $0.00070 |
| Haiku 4.5 | $0.00003 | $0.00035 |
Grade A, and why
writer-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 28d 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.
What it actually says
Worldbuilding
When to use
Use when a scene depends on world rules, the setting contradicts itself, or the author wants a new location or system.
Inputs and assumptions
Start with the story need and existing rules. Do not assume the author wants exhaustive lore.
Portable workflow
- Identify the decisions the setting must enable or constrain.
- Define the rule, its cost, its limits, who can use it, and who benefits from controlling access.
- Test ordinary consequences for work, travel, law, family, economics, and conflict where relevant.
- Find edge cases that would trivialize the plot. Repair the rule with costs or scope, not arbitrary exceptions introduced at the climax.
- Build places through usable geography, routines, sensory details, and competing interests.
- Separate fictional invention from claims about real cultures or history. Research the latter when necessary.
- Save focused notes and unresolved questions according to the project workflow.
Safety and side effects
Ask before changing established rules. Avoid treating real communities as interchangeable exotic props. No external research or publishing is automatic.
Scripts, references, and dependencies
No required services. Use the sibling research skill when the author needs factual support.
Verification
Check whether the rules solve the story's problem too easily, whether costs have consequences, and whether new lore contradicts cited manuscript evidence.
Pi adapter
Use /writer worldbuilding --brief "Design a memory-based magic system with costs that matter outside combat".
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.
- 28d ago First seen · 42 lines · 26 tokens per session scan A 7363b4db51cc
writer-worldbuilding is a skill published in the GitHub repository Firstp1ck/pi-coding-agent-forge (91 stars, last pushed today), licensed MIT. It adds 26 tokens to every session and 349 once invoked, about $0.0001 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 2026-09-19.
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