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 jeremylongworth-source/AgentSkills --skill synthetic-character-biblegit clone --depth 1 https://github.com/jeremylongworth-source/AgentSkillsWrote 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/jeremylongworth-source/agentskills/synthetic-character-bible)<a href="https://agentmods.dev/skills/jeremylongworth-source/agentskills/synthetic-character-bible"><img src="https://agentmods.dev/badge/skills/jeremylongworth-source/agentskills/synthetic-character-bible/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/jeremylongworth-source/agentskills/synthetic-character-bible"><img src="https://agentmods.dev/badge/skills/jeremylongworth-source/agentskills/synthetic-character-bible.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 | $0.00078 | $0.00493 |
| Opus 5 | $0.00039 | $0.00246 |
| Sonnet 5 | $0.00016 | $0.00099 |
| Haiku 4.5 | $0.00008 | $0.00049 |
Grade A, and why
synthetic-character-bible 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 8d 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 — 55 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Synthetic Character Bible
Core Workflow
- Identify the character purpose, audience, platform, creator relationship, human/fictional status, commercial context, and approval owner.
- Define character identity, role, voice, visual language, continuity rules, backstory boundaries, content lanes, and what the character must not claim.
- Add disclosure, authenticity, likeness, voice, rights, provenance, sponsor, platform-policy, safety, and audience-trust guardrails.
- Separate fictional details from real facts, creator claims, sponsor claims, medical/legal/financial claims, and audience data.
- Define review gates for scripts, generated assets, comments, sponsor use, sensitive topics, and public corrections.
- Keep the bible as a planning artifact. Do not create accounts, publish assets, impersonate real people, or claim the character is human unless the context and review owner explicitly require a lawful disclosure-aware path.
Boundary Rules
- Avoid impersonating real people, private individuals, public figures, living artists, protected characters, or distinctive voices without rights review.
- Do not invent credentials, lived experience, testimonials, audience relationships, medical/legal/financial expertise, or sponsor outcomes.
- Do not hide that a character is synthetic when disclosure is required or audience trust would reasonably depend on it.
- Escalate minors, sexuality, harassment, hate, politics, regulated products, health, finance, legal, crisis, or sponsor-sensitive uses.
Deliverable Shape
For synthetic character bibles, provide:
- Character purpose
- Identity and role
- Voice and visual rules
- Backstory and continuity
- Content lanes
- Disclosure and authenticity rules
- Rights and provenance checks
- Prohibited claims
- Review gates
- Approval owner
References
- Read
references/synthetic-character-bible-checklist.mdwhen creating or reviewing synthetic character, virtual influencer, or AI persona bibles.
What ships with it
2 files 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.
- 8d ago First seen · 55 lines · 78 tokens per session scan A fd11fadc667c
synthetic-character-bible is a skill published in the GitHub repository jeremylongworth-source/AgentSkills (1 stars, last pushed 10d ago), licensed MIT. It adds 78 tokens to every session and 493 once invoked, about $0.0004 per session on Opus 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 2026-09-03.
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