bible-expand

bible-expand is a skill for Claude Code from GoogilyBoogily/googilyboogily-claude-power-tools. It costs 29 tokens per session (1,314 once invoked), scanned A, original, MIT.

A deep-dive tool for expanding one section of a Game Design Bible with more detail or focused exploration.

In plain words
What is it for?
It locates a bible section, rereads the design pillars, examines related files, and expands a chosen topic such as economy balance or boss design.
Why use it?
It helps develop underspecified areas of a game design while keeping them aligned with the project's established design priorities.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: model in frontmatter; names the AskUserQuestion tool.

Part of the game-design-bible plugin — 28 skills, 1 agent shipped together

Good fit It locates a bible section, rereads the design pillars, examines related files, and expands a chosen topic such as economy balance or boss design.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/googilyboogily/googilyboogily-claude-power-tools/bible-expand
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 GoogilyBoogily/googilyboogily-claude-power-tools --skill bible-expand
Clone the repo
git clone --depth 1 https://github.com/GoogilyBoogily/googilyboogily-claude-power-tools

Made for: Claude Code.

Or install game-design-bible, the plugin that ships this one along with the rest of its 28 skills, 1 agent.

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 bible-expand

README.md
[![agentmods](https://agentmods.dev/badge/skills/googilyboogily/googilyboogily-claude-power-tools/bible-expand/github.svg)](https://agentmods.dev/skills/googilyboogily/googilyboogily-claude-power-tools/bible-expand)
Your own site
<a href="https://agentmods.dev/skills/googilyboogily/googilyboogily-claude-power-tools/bible-expand"><img src="https://agentmods.dev/badge/skills/googilyboogily/googilyboogily-claude-power-tools/bible-expand/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 bible-expand

Your own site · 80×15
<a href="https://agentmods.dev/skills/googilyboogily/googilyboogily-claude-power-tools/bible-expand"><img src="https://agentmods.dev/badge/skills/googilyboogily/googilyboogily-claude-power-tools/bible-expand.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 29 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,314 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 $0.00029 $0.01314
Opus 5 $0.00015 $0.00657
Sonnet 5 $0.00006 $0.00263
Haiku 4.5 $0.00003 $0.00131

Measured 9d ago against content hash 985a43b4b345, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

bible-expand 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 9d 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.

plugins/game-design-bible/skills/bible-expand/SKILL.md · 142 lines

How it starts

The opening of the file, as written. The whole thing — 142 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Bible Expand — Section Deep-Dive

Argument Parsing

Parse the following from $ARGUMENTS:

  • section-path: Path to a file or directory within the bible, relative to bible root (optional — prompt if missing)
  • aspect: Specific aspect to explore, e.g., "economy balancing", "boss design", "environmental storytelling" (optional)

Step 1: Locate the Bible Root

If section-path is relative, resolve it by searching upward for INDEX.md to find the bible root.

If no section-path provided:

  1. Find the bible root (look for INDEX.md in current directory or parent directories)
  2. Read INDEX.md
  3. Present the section list:

    "Which section would you like to expand?" [numbered list of all sections from INDEX.md with their current file sizes]

  4. Wait for user selection

Step 2: Re-establish Pillar Context

Read <bible-root>/DESIGN-PILLARS.md.

ALWAYS re-read pillars — every expansion must align with the established design pillars. This is non-negotiable.

Step 3: Read Target Section

Resolve the section path:

  • If file: Read the target file
  • If directory: Read all .md files in the directory, build a content map

Also read cross-referenced files:

  • Grep the target for references to other bible sections (patterns like see [section-name], links to other files)
  • Read referenced files to understand the full context

Present a section summary:

"📄 [Section Name]

  • Current size: N lines
  • Cross-references: [list]
  • Open questions: [count]
  • Pillar alignment: [which pillars this section serves]"

Step 4: Assess Expansion Type

Based on the section content and user's aspect request, determine the expansion type:

A. Depth Expansion

The section exists but needs more detail within its current structure.

  • Trigger: Section is thin (< 50 lines of content), or user asks for "more detail"
  • Action: Edit the existing file to add depth to existing subsections

B. Split Expansion

The section is too large or covers too many topics for a single file.

  • Trigger: File exceeds 300 lines, or covers 3+ distinct topics
  • Action: Create a subdirectory, split into focused sub-files, update the original as an index

Read the full file on GitHub · 142 lines

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. 9d ago First seen · 142 lines · 29 tokens per session scan A 985a43b4b345

Subscribe to this mod's changes

bible-expand is a skill published in the GitHub repository GoogilyBoogily/googilyboogily-claude-power-tools (2 stars, last pushed 4mo ago), licensed MIT. It adds 29 tokens to every session and 1,314 once invoked, about $0.0001 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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