Spiderbrain.ai-Coremind: Instructions file for Codex

AGENTS.md

Spiderbrain.ai-Coremind AGENTS.md is an instructions file for Codex, OpenCode from aabhisrv/Spiderbrain.ai-Coremind. It costs 443 tokens per session, scanned A, original, MIT.

A set of instructions for using a committed map of a code repository’s files, dependencies, and change impact. The map is stored in the repository’s `.spiderbrain` folder.

In plain words
What is it for?
It is for checking the repository’s load-bearing files, viewing a change’s likely blast radius, and finding the reasoning behind a file. It can also run as a local MCP server or through one-off commands.
Why use it?
It helps an agent understand which files matter and what a change may affect before reading or editing the code. Optional cloud access adds current scores, search, and explanations for file decisions.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md.

This is aabhisrv/Spiderbrain.ai-Coremind's own configuration. It tells Codex and OpenCode how to work on Spiderbrain.ai-Coremind 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 Spiderbrain.ai-Coremind configures →

Reuse

Borrowing it

Nothing to install: this file belongs to aabhisrv/Spiderbrain.ai-Coremind. 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/aabhisrv/Spiderbrain.ai-Coremind/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/aabhisrv/Spiderbrain.ai-Coremind

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 Spiderbrain.ai-Coremind AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/aabhisrv/spiderbrain.ai-coremind/agents-md.svg)](https://agentmods.dev/instructions/aabhisrv/spiderbrain.ai-coremind/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/aabhisrv/spiderbrain.ai-coremind/agents-md"><img src="https://agentmods.dev/badge/instructions/aabhisrv/spiderbrain.ai-coremind/agents-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 443 This file is loaded in full into every session.
When invoked 443 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 $0.00443 $0.00443
Opus 5 $0.00221 $0.00221
Sonnet 5 $0.00089 $0.00089
Haiku 4.5 $0.00044 $0.00044

Measured 7d ago against content hash 0cd8ef6baaaf, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

Spiderbrain.ai-Coremind 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 7d 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 · 31 lines

What it actually says

Repo understanding (SpiderBrain)

This repo carries a committed brain in .spiderbrain/: a deterministic, source-free map of its structure, dependencies, and blast radius (36 files, 20 edges). Consult it before reading files, to know what matters and what a change reaches.

Fastest use (an MCP server for this repo, no SpiderBrain install, no account): npx spiderbrain mcp One-off: npx spiderbrain blast # what a change to reaches npx spiderbrain keystones # the load-bearing files

Keystones (top by reach, precomputed so you get value without installing anything):

  • read/src/core.mjs (reaches 5 files)
  • create/src/export.mjs (reaches 4 files)
  • read/src/git.mjs (reaches 4 files)
  • create/src/gitinfo.mjs (reaches 3 files)
  • read/src/cloud.mjs (reaches 3 files)
  • read/src/registry.mjs (reaches 3 files)
  • create/src/fetch.mjs (reaches 2 files)
  • create/src/cli.mjs (reaches 1 files)

The why (decisions, reasoning, always-fresh scores) is the cloud layer. Set SPIDERBRAIN_API_KEY (get one at https://spiderbrain.ai/dashboard?tab=keys) and any command above also returns fresh scores, semantic search, and sb_why <path> (the decision behind a file).

Deterministic: this block regenerates byte-identically from commit 65e8021e1e43b1b3c69e772d8a3476563b08efe3 (fingerprint 94362fb089c2c6be). Do not hand-edit between the markers.

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. 7d ago First seen · 31 lines · 443 tokens per session scan A 0cd8ef6baaaf

Subscribe to this mod's changes

Spiderbrain.ai-Coremind AGENTS.md is an instructions file published in the GitHub repository aabhisrv/Spiderbrain.ai-Coremind (3 stars, last pushed 17d ago), licensed MIT. It adds 443 tokens to every session, about $0.0022 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 2026-08-31.

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