Nreki: Instructions file for Codex

AGENTS.md

Nreki AGENTS.md is an instructions file for Codex, OpenCode from Ruso-0/Nreki. It costs 1,124 tokens per session, scanned A, original, Apache-2.0.

Repository instructions for AI coding agents working with Nreki, including rules for searching, reading, editing, and checking code changes.

In plain words
What is it for?
They guide exact and semantic searches, batched code reading, surgical edits, and attention to the possible impact of changes.
Why use it?
They provide a consistent way to navigate the codebase and limit unnecessary tool output or risky edits.

Instructions file for CodexOpenCode

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

This is Ruso-0/Nreki's own configuration. It tells Codex and OpenCode how to work on Nreki 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 Nreki configures →

View source ↗ Ruso-0/Nreki
Reuse

Borrowing it

Nothing to install: this file belongs to Ruso-0/Nreki. 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/Ruso-0/Nreki/master/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/Ruso-0/Nreki

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 Nreki AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/ruso-0/nreki/agents-md.svg)](https://agentmods.dev/instructions/ruso-0/nreki/agents-md)
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<a href="https://agentmods.dev/instructions/ruso-0/nreki/agents-md"><img src="https://agentmods.dev/badge/instructions/ruso-0/nreki/agents-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 1,124 This file is loaded in full into every session.
When invoked 1,124 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 $0.01124 $0.01124
Opus 5 $0.00562 $0.00562
Sonnet 5 $0.00225 $0.00225
Haiku 4.5 $0.00112 $0.00112

Measured 8d ago against content hash 14e9b25897a8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

Nreki 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 8d 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 · 47 lines

How it starts

The opening of the file, as written. The whole thing — 47 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

Instructions for AI coding agents consuming NREKI via MCP (Codex, Gemini, others)

0. ZERO-CHATTER

  • Call tools immediately. No "I will now..." or "Let me...".
  • State changes in one line. No ASCII tables, no summaries.
  • Output tokens cost 5x input. Optimize every syllable.

1. NAVIGATION & READING

  • NEVER use Explore, Bash grep/rg/cat, or native Read File.
  • EXACT SEARCH: ALWAYS use nreki_navigate action:"fast_grep". Returns 3D AST topological coordinates (File + Symbol + Line) via in-memory SoA cache populated at engine boot from pre-segmented AST chunks. Hot path uses V8's vectorized String.prototype.indexOf (memchr SIMD), zero SQLite calls per query. Median P50 ~1.7ms / P99 ~3.6ms on NREKI's own corpus, ~13× faster than ripgrep in mediana.
  • SEMANTIC SEARCH: Use nreki_navigate action:"search" for concept-based queries.
  • BATCH READING: NEVER read functions one by one. Use ONE call with comma-separated targets: nreki_code action:"compress" focus:"func1, func2, func3".
  • LARGE FILES: nreki_navigate action:"outline" auto-expands HIGH-risk methods up to 6,000 token budget.
    • CRITICAL: If outline says [BUDGET LIMIT REACHED], you MUST use compress focus:"<omitted_symbols>" to read the hidden logic before editing. Do not guess.
    • Pay attention to ⚠️ (Defect flags) and 👻 [0 ext refs] (Orphan/safe-to-delete) markers.
  • Small files: nreki_code action:"read".

2. SURGICAL EDITING & ACID BATCHES

  • NEVER use native Write/Replace on existing files (bypasses AST validation).
  • NEVER edit sequentially. Read ALL targets first, then batch ALL fixes in ONE nreki_code action:"batch_edit" call.
  • 80L GUILLOTINE: NREKI mathematically rejects any single payload (new_code or replace_text) >80 lines. You MUST decompose large rewrites.
  • PATCH MODE (MANDATORY): If the original symbol is >40 lines, mode:"replace" is BLOCKED. You MUST use mode:"patch" with search_text and replace_text.
    • Tolerant Match: search_text indentation is fuzzy. Focus on unique logical content. Do not worry about exact leading spaces.
    • Multi-Patching: To bypass the 80L limit, send MULTIPLE patch edits to the SAME symbol sequentially in one batch_edit.
    • ACID Rule: When multi-patching a symbol, EVERY search_text must match the ORIGINAL unaltered source code. Do not target code injected by previous patches.
  • ANTI-SWEEP SHIELD: NEVER use // eslint-disable, @ts-ignore, or # noqa. NREKI will block your edit. Fix the structural flaw.
  • RENAMING: Run nreki_navigate action:"prepare_refactor" first.

Read the full file on GitHub · 47 lines

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. 8d ago First seen · 47 lines · 1,124 tokens per session scan A 14e9b25897a8

Subscribe to this mod's changes

Nreki AGENTS.md is an instructions file published in the GitHub repository Ruso-0/Nreki (11 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 1,124 tokens to every session, about $0.0056 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 2026-08-30.

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