Borrowing it
Nothing to install: this file belongs to udin-io/ex_athena. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/udin-io/ex_athena/main/CLAUDE.mdgit clone --depth 1 https://github.com/udin-io/ex_athenaWrote 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/instructions/udin-io/ex_athena/claude-md)<a href="https://agentmods.dev/instructions/udin-io/ex_athena/claude-md"><img src="https://agentmods.dev/badge/instructions/udin-io/ex_athena/claude-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.
<a href="https://agentmods.dev/instructions/udin-io/ex_athena/claude-md"><img src="https://agentmods.dev/badge/instructions/udin-io/ex_athena/claude-md.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 | $0.01927 | $0.01927 |
| Opus 5.5 | $0.00771 | $0.00771 |
| Sonnet 5.5 | $0.00385 | $0.00385 |
| Haiku 4.5 | $0.00193 | $0.00193 |
Grade A, and why
ex_athena CLAUDE.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 17d 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 — 153 lines — stays where its author put it; the contents beside it link to each section on GitHub.
ex_athena — project notes
Rules that are true of THIS repo. The global rules still apply; nothing here repeats them.
Project source of truth
docs/PROJECT.md and its pages (roadmap.md, architecture.md, risks.md,
decisions.md) do not exist yet and must be created. Until they do, every
session that touches this repo should treat creating them as the first
outstanding task, and README.md must link to the hub near the top once it
exists.
There is an adr/ directory with 20+ entries. It must be migrated into
docs/decisions.md — one dated entry per decision that still shapes the
system, dropping the ones that were really bug fixes — and then deleted, in
the same PR as the migration. Do not add new ADRs. Two entries matter
most to anyone touching the loop's mistake counter: adr/0007 (propagate
resets through the parallel fold) and adr/0020 (reset at the turn boundary,
not per call).
Once the pages exist: every PR that changes behaviour, structure, a risk or a
decision updates them in the SAME PR, and a merge is not finished until they
describe main as it now is.
Every behaviour change updates CHANGELOG.md
A PR that changes behaviour adds its entry to CHANGELOG.md under
## Unreleased, in the same PR. Match the style already in the file: a bold
one-line claim, the issue link, then prose saying what was broken, what
changed, and what a user or host now sees differently — written for someone
who was not there. Every figure comes from the issue, the PR or the code;
never invent one. Group under ### Added / ### Changed / ### Fixed /
### Security, and place the entry where the section reads well rather than
strictly by merge date.
Running the tests
There is no database. Skip every DB and partition-setup step in the global
rules. The suite still needs MIX_TEST_PARTITION set, because config/test.exs
derives :web_dir from it to isolate the session store between concurrent runs:
MIX_TEST_PARTITION=_issue_<num> mix test
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.
- 17d ago Changed · +2 lines · +45 tokens per session 3015a75ffc54
- 19d ago Changed · +9 lines · +146 tokens per session 20708b0de4e4
- 1mo ago Changed · +44 lines · +608 tokens per session 1437f5c63dad
- 1mo ago Changed · +1 lines · +2 tokens per session 025139f0f187
- 1mo ago Changed · +7 lines · +126 tokens per session a6f27d4f1fbc
- 1mo ago First seen · 90 lines · 1,000 tokens per session scan A e82078c8c32d
ex_athena CLAUDE.md is an instructions file published in the GitHub repository udin-io/ex_athena (4 stars, last pushed 14d ago), licensed Apache-2.0. It adds 1,927 tokens to every session, about $0.0077 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 2026-09-13.
ex_athena CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| ex_athena CLAUDE.mdudin-io/ex_athena | Instructions file | 4 | 14d ago | Apache-2.0 | A | 1,927 | Claude Code |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 5,516 | GitHub Copilot |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | today | MIT | A | 4,680 | Codex, OpenCode |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | today | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 275k | 3d ago | MIT | A | 4,313 | Codex, OpenCode |