A guided method for using the I Ching, an ancient Chinese text and system of 64 hexagrams, to reflect on change, timing, tension, and response. It can interpret six line values supplied by the user or perform a coin-style cast.

Casting or interpreting hexagrams, analysing a changing situation, and offering symbolic reflection and practical guidance based on the result.

It provides a structured way to think about a situation without presenting the result as a certain prediction or command. It also sets boundaries for medical, legal, financial, and emergency questions.

iching — Skill for Codex by sapuyou45-bit

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 sapuyou45-bit/oraclebone --skill iching

Clone the repo

git clone --depth 1 https://github.com/sapuyou45-bit/oraclebone

Made for: 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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/sapuyou45-bit/oraclebone/iching.svg)](https://agentmods.dev/skills/sapuyou45-bit/oraclebone/iching)

Your own site

<a href="https://agentmods.dev/skills/sapuyou45-bit/oraclebone/iching"><img src="https://agentmods.dev/badge/skills/sapuyou45-bit/oraclebone/iching.svg" alt="Measured on agentmods" height="20"></a>

Per session 48 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 490 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.

Model	Per session	Once invoked
Fable 5.1	$0.00048	$0.00490
Opus 5	$0.00024	$0.00245
Sonnet 5	$0.00010	$0.00098
Haiku 4.5	$0.00005	$0.00049

Measured 7d ago against content hash 0155fe349525, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

iching 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 7d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/_standalone_iching.py, scripts/cast.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skills/iching/SKILL.md · 55 lines

What it actually says

I Ching

I Ching readings analyze change, timing, tension, and response. They are not deterministic commands.

When to Use

The user asks for I Ching, Yi Jing, Zhouyi, 易经, 周易, hexagrams, coins, or yarrow.
The user wants symbolic reflection on timing, change, tension, strategy, or response.
The user provides six bottom-to-top line values and wants an interpretation.

When Not to Use

The request needs medical, legal, financial, emergency, or crisis advice.
The user wants a guaranteed prediction or deterministic command.
The user asks the agent to invent line values or recast for a nicer result.

Workflow

Clarify the question if it is vague or high-stakes.
Run scripts/cast.py unless the user provides six line values.
Read references/casting-methods.md when the casting method matters.
Read references/interpretation-template.md before writing the interpretation.
Read references/sources.md when method rigor or adjacent systems matter.
Read references/hexagrams.md for the primary and resulting hexagram.
Interpret using the shared response contract:
- Result
- Symbolic Reading
- Situation Mapping
- Hidden Variables
- Actionable Guidance
- Boundaries

Commands

python3 scripts/cast.py --method coins
python3 scripts/cast.py --method yarrow
python3 scripts/cast.py --method manual --lines 6,7,8,9,7,8

Line order is bottom-to-top.

Rules

Do not invent line values or hexagrams.
For real readings, prefer coins, yarrow, or manual; random is only a compatibility alias.
Do not recast to get a more convenient answer.
Treat changing lines as areas of active transition, not guaranteed events.
If the question is medical, legal, financial, or crisis-related, switch to reflective support and recommend qualified help.

Files

What ships with it

13 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.

7d ago First seen · 55 lines · 48 tokens per session scan A 0155fe349525

Subscribe to this mod's changes

iching is a skill published in the GitHub repository sapuyou45-bit/oraclebone (4 stars, last pushed 6d ago), licensed MIT. It adds 48 tokens to every session and 490 once invoked, about $0.0002 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 2026-08-31.

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