Borrowing it
Nothing to install: this file belongs to mrzdevcore/haira. 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/mrzdevcore/haira/main/CLAUDE.mdgit clone --depth 1 https://github.com/mrzdevcore/hairaWrote 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/mrzdevcore/haira/claude-md)<a href="https://agentmods.dev/instructions/mrzdevcore/haira/claude-md"><img src="https://agentmods.dev/badge/instructions/mrzdevcore/haira/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/mrzdevcore/haira/claude-md"><img src="https://agentmods.dev/badge/instructions/mrzdevcore/haira/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 | $0.00221 | $0.00221 |
| Opus 5.5 | $0.00088 | $0.00088 |
| Sonnet 5.5 | $0.00044 | $0.00044 |
| Haiku 4.5 | $0.00022 | $0.00022 |
Grade A, and why
haira 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.
What it actually says
Haira — Claude Code Instructions
Project Context
Primary languages: Go (main), TypeScript (frontend/tooling), Rust (occasional). When writing Go code, always verify API compatibility of external packages before using methods that may not exist in the version being used.
Debugging
When fixing bugs, verify the root cause before applying a fix. Do not assume naming mismatches or surface-level issues — check the actual database schema, config, or runtime behavior first.
UI/Frontend
For UI implementations, get the layout and positioning right on the first pass. Show clean, user-friendly labels instead of raw IDs. When implementing scrollable lists or virtual scroll, prefer div-based approaches over table row hacks.
Testing
When writing tests, use page object patterns and existing test abstractions rather than raw selectors. Check existing test files for conventions before writing new tests.
Writing & Communication
When the user asks for content drafting (emails, posts, replies), keep responses concise and incorporate ALL feedback in each iteration. Do not re-add details the user explicitly asked to remove.
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 · 22 lines · 221 tokens per session scan A aa6baafbaf18
haira CLAUDE.md is an instructions file published in the GitHub repository mrzdevcore/haira (6 stars, last pushed 8mo ago), licensed Apache-2.0. It adds 221 tokens to every session, about $0.0009 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 2026-08-31.
haira CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| haira CLAUDE.mdmrzdevcore/haira | Instructions file | 6 | 8mo ago | Apache-2.0 | A | 221 | Claude Code |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
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| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |