alchemy: Instructions file for Codex

AGENTS.md

alchemy AGENTS.md is an instructions file for Codex, OpenCode from AndyUneducated/alchemy. It costs 138 tokens per session, scanned A, original, Apache-2.0.

A project instruction guide for Alchemy, a personal collection of small software experiments.

In plain words
What is it for?
Use it when adding to an experiment, deciding where project notes belong, or recording important technical decisions and progress.
Why use it?
It records the project's working rules and documentation habits so contributors can keep separate experiments organised and consistent.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions Cursor.

This is AndyUneducated/alchemy's own configuration. It tells Codex and OpenCode how to work on alchemy itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything alchemy configures →

Reuse

Borrowing it

Nothing to install: this file belongs to AndyUneducated/alchemy. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/AndyUneducated/alchemy/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/AndyUneducated/alchemy

Made for: Codex, OpenCode.

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 alchemy AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/andyuneducated/alchemy/agents-md/github.svg)](https://agentmods.dev/instructions/andyuneducated/alchemy/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/andyuneducated/alchemy/agents-md"><img src="https://agentmods.dev/badge/instructions/andyuneducated/alchemy/agents-md/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 alchemy AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/andyuneducated/alchemy/agents-md"><img src="https://agentmods.dev/badge/instructions/andyuneducated/alchemy/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 138 This file is loaded in full into every session.
When invoked 138 The same file — it is already loaded in full.
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 $0.00138 $0.00138
Opus 5.5 $0.00055 $0.00055
Sonnet 5.5 $0.00028 $0.00028
Haiku 4.5 $0.00014 $0.00014

Measured 2mo ago against content hash a808518b8e37, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

alchemy AGENTS.md 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.

AGENTS.md · 7 lines

What it actually says

Agent notes — workshops

Personal vibe-coding sandbox: many small experiments, not one shipped product.

  • Cursor rules (source of truth): .cursor/rules/workshops.mdc — layout, editing discipline, decision & journal logs, language.
  • Sub-project docs: every play/<name>/ should have a README.md (overview). Design-heavy or long-lived projects additionally keep DECISIONS.md (ADR archive) and JOURNAL.md (per-milestone progress, ≤2/day). Important technical decisions land in DECISIONS.md; substantive daily progress lands in JOURNAL.md.
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 · 7 lines · 138 tokens per session scan A a808518b8e37

Subscribe to this mod's changes

alchemy AGENTS.md is an instructions file published in the GitHub repository AndyUneducated/alchemy (20 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 138 tokens to every session, about $0.0006 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 2026-08-30.

Related

alchemy AGENTS.md compared with instructions from other repositories

alchemy AGENTS.md next to 6 instructions from other repositories
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alchemy AGENTS.mdAndyUneducated/alchemyInstructions file202mo agoApache-2.0A138Codex, OpenCode
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