What is evlog CLAUDE.md?

Project-specific instructions for evlog, a TypeScript-focused logging project that records structured events and errors. Structured logs store information in consistent fields so software can filter and inspect them more easily.

Use it when modifying HugoRCD/evlog or working with its TypeScript code, runtime events, and structured errors.

It explains the project’s expected development conventions, so changes fit its existing code and logging approach.

How HugoRCD/evlog configures Claude Code

About the project

evlog is a TypeScript-first logging and observability project built around wide events and structured errors across runtimes. It is intended to help developers record application behavior and diagnose failures.

HugoRCD/evlog · 1,903 stars · on GitHub · evlog.dev

Reuse

Borrowing it

Nothing to install: this file belongs to HugoRCD/evlog. 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/HugoRCD/evlog/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/HugoRCD/evlog

Made for: Claude Code.

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/instructions/hugorcd/evlog/claude-md/github.svg)](https://agentmods.dev/instructions/hugorcd/evlog/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/hugorcd/evlog/claude-md"><img src="https://agentmods.dev/badge/instructions/hugorcd/evlog/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/hugorcd/evlog/claude-md"><img src="https://agentmods.dev/badge/instructions/hugorcd/evlog/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 5 This file is loaded in full into every session.

When invoked 5 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 100% copy Near-identical to another mod 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	$0.00005	$0.00005
Opus 5.5	$0.00002	$0.00002
Sonnet 5.5	$0.00001	$0.00001
Haiku 4.5	$0.00001	$0.00001

Measured 2mo ago against content hash 336cc4fbf19b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

evlog 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 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.

Origin

This is a copy

100% identical to deepseek-harness CLAUDE.md — 3 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

CLAUDE.md · 2 lines

What it actually says

@AGENTS.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.

2mo ago First seen · 2 lines · 5 tokens per session scan A 336cc4fbf19b

Subscribe to this mod's changes

evlog CLAUDE.md is an instructions file published in the GitHub repository HugoRCD/evlog (1,903 stars, last pushed 12d ago), licensed MIT. It adds 5 tokens to every session, about $0.0000 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to deepseek-harness CLAUDE.md, differing in 3 lines, and is treated as a copy.

error-handling logging nuxt observability

evlog CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
evlog CLAUDE.mdHugoRCD/evlog	Instructions file	1.9k	12d ago	MIT	A	5	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
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	today	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

evlog: Instructions file for Claude Code