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_engine

_engine is a skill for Claude Code, Codex from o-1717986918/arcvellum. It costs 0 tokens per session (320 once invoked), scanned A, original, MIT.

An internal writing-engine component for a Studio package, with rules for controlled long-form creative work and publishing.

In plain words
What is it for?
Use it to manage structured fiction or other long-form creative projects through drafting, review, revision, and approval.
Why use it?
It defines which materials may be used, where outputs may be written, and which reviews are required before approval or release.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: mentions subagents.

not rated 19repo 6d ago A scan 0 tokens original MIT

Good fit Use it to manage structured fiction or other long-form creative projects through drafting, review, revision, and approval.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/o-1717986918/arcvellum/_engine
View source ↗ o-1717986918/arcvellum
Install

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.

Any agent
npx skills add o-1717986918/arcvellum --skill _engine
Clone the repo
git clone --depth 1 https://github.com/o-1717986918/arcvellum

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for _engine

README.md
[![agentmods](https://agentmods.dev/badge/skills/o-1717986918/arcvellum/_engine/github.svg)](https://agentmods.dev/skills/o-1717986918/arcvellum/_engine)
Your own site
<a href="https://agentmods.dev/skills/o-1717986918/arcvellum/_engine"><img src="https://agentmods.dev/badge/skills/o-1717986918/arcvellum/_engine/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.

agentmods 80×15 button for _engine

Your own site · 80×15
<a href="https://agentmods.dev/skills/o-1717986918/arcvellum/_engine"><img src="https://agentmods.dev/badge/skills/o-1717986918/arcvellum/_engine.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 320 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.00320
Opus 5.5 $0.00000 $0.00128
Sonnet 5.5 $0.00000 $0.00064
Haiku 4.5 $0.00000 $0.00032

Measured 2mo ago against content hash ac0f17f41f69, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

_engine 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 2mo 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.

src/literary_engineering_studio_engine/_engine/SKILL.md · 21 lines

What it actually says

Studio 内嵌文学工程内核

本文件保留 SKILL.md 路径是为了兼容正式任务包的 required reading。它属于 Studio 安装包，不代表需要安装或定位另一个 Skill 仓库。

操作宪法

  1. 正式工作只通过当前任务包推进。
  2. 只读取任务包列出的资料，以及 Studio 注入的当前用户创作方向。
  3. 只写入 expected_outputs，不得手写 CLI 应生成的流程产物。
  4. 不使用 debug waiver、maintainer mode 或跳审指令。
  5. 正文与正文修订必须由当前主 Agent 完成，subagent 只做机械辅助工作。
  6. Agent 输出必须经过 Studio 写回白名单和内嵌引擎门禁，聊天回复不代表任务完成。
  7. Canon 应用、正式晋升、发布与高风险变更必须等待对应审批。

创作要求

  • 长篇创作先完成字数预算、剧情库存与章节义务。
  • 场景开发必须经过上下文、角色推演、分支、编排、候选正文、审查、晋升、状态演化与 Canon 分类。
  • 正文生成遵守挂载文风、标点、节奏衔接、读者体验和反 AI 腔约束。
  • 最终交付过滤场景编号、审查痕迹、Canon 注释和流程信息。
Files

What ships with it

60 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.

Changes

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.

  1. 2mo ago First seen · 21 lines · 0 tokens per session scan A ac0f17f41f69

Subscribe to this mod's changes

_engine is a skill published in the GitHub repository o-1717986918/arcvellum (19 stars, last pushed 6d ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 320 tokens. 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 2026-08-30.

Claude CodeWriting and docsagentagent-workflowcodex-clicreative-writinglong-form-writing
Related

_engine compared with skills from other repositories

_engine next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
_engineo-1717986918/arcvellumSkill196d agoMITA0Claude Code, Codex
atifactwaldekmastykarz/atifactSkill624d agoMITA90Claude Code, Codex
tianming-novel-systemzy-zmc/tianming-skillSkill1582d agononeA139Claude Code
agent-flowkanghelyu/agent-flowSkill62mo agoMITA60Codex
ss-explore-sourcebonnguyenitc/specshipSkill23mo agoMITA84Codex
ss-reviewbonnguyenitc/specshipSkill23mo agoMITA74Codex
ss-specbonnguyenitc/specshipSkill23mo agoMITA80Codex