Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/bnet47/codexicon/agents-mdgit clone --depth 1 https://github.com/bnet47/codexiconWhat 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 | $0.01329 | $0.01329 |
| Opus 5 | $0.00665 | $0.00665 |
| Sonnet 5 | $0.00266 | $0.00266 |
| Haiku 4.5 | $0.00133 | $0.00133 |
Grade C, and why
codexicon AGENTS.md scanned grade C with 1 finding 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 2d 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.
Reaches for credential fileshighPrivilege escalation
SSH keys, cloud credentials, git-credentials, .npmrc, /etc/shadow: reading these is how a config file becomes a credential leak.
- Never read or write credential-bearing `.env` / `.env.*` files (except `.env.example`), `secrets/**`, private-key files, credential JSON, or user credential stores such as `.npmrc`, `.netrc`, `.aws/credentials`, `.ssh/ How it starts
The opening of the file, as written. The whole thing — 94 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md — [PROJECT_NAME]
Durable repository guidance for Codex. Keep this file short; detailed workflows belong in skills and project facts belong in
agent_docs/.
Project
- Name:
[PROJECT_NAME] - Purpose:
[one sentence describing the problem and intended outcome] - Stack:
[language · framework · data store · deploy target] - Phase:
[idea | prototype | alpha | production] - Owner:
[name or GitHub handle]
If these fields are still placeholders, treat the repository as an unconfigured template. Use $discover before making product or stack decisions, then $init to configure the repository.
Commands
Run commands from the repository root.
./scripts/setup.sh # install dependencies and prepare local config
./scripts/dev.sh # start the local development environment
./scripts/lint.sh # lint, format-check, and type-check
./scripts/lint.sh --fix # apply safe lint/format fixes
./scripts/test.sh # run the full test suite
./scripts/security.sh # scan tracked/non-ignored safe files for credentials
python scripts/codexicon.py doctor # diagnose harness/configuration drift
python scripts/codexicon.py verify # run lint, tests, and security in canonical order
./scripts/deploy.sh staging # deploy to staging
./scripts/deploy.sh prod # production; requires DEPLOY_APPROVED=true
Before initialization, native Windows can run ./scripts/lint.ps1 and ./scripts/test.ps1. $init must create equivalent native wrappers or platform-neutral commands for every command the configured project supports; do not silently substitute weaker verification.
Working agreements
- Start from the requested outcome and done conditions. Inspect first; preserve unrelated changes.
- For clear requests, own the internal build/review loop and do not turn skills into approval gates. Make reversible assumptions; record consequential ones; batch blocking questions; escalate only for material product, irreversible, destructive, external, production, credential, legal, regulatory, security, or financial risk.
- For medium or high-complexity work, use
$engineering-loopwhen independent exploration, implementation, testing, or review lanes materially improve the result. Keep small clear changes direct. - Use
$find-skillsonly for an explicit capability search. External skill discovery is read-only until the user approves a reviewed, pinned, project-local installation. - Prefer the smallest complete solution. Use
rgfor search andapply_patchfor manual edits. - Load only relevant context. Use targeted commands and bounded output; do not dump whole logs, generated files, or minified content when an excerpt proves the point.
- Communicate densely: no request restatement, filler, or repeated summary. Preserve exact code, commands, paths, identifiers, and errors. Clarity wins for risk or ambiguity.
- Verify proportionally: full lint/tests for code, config, generated artifacts, and shipping; security before Git publication; applicable structural checks for documentation-only work.
- Report commands, results, and anything not verified.
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.
- 2d ago First seen · 94 lines · 1,329 tokens per session scan C c9cb06b04076
codexicon AGENTS.md is an instructions file published in the GitHub repository bnet47/codexicon (5 stars, last pushed 3d ago), licensed MIT. It adds 1,329 tokens to every session, about $0.0066 per session on Opus 5. A static security scan graded it C with 1 finding (reaches for credential files). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other instructions, from other repositories
genomi AGENTS.md
Instructions for exon-research/genomi, covering genomi development agent instructions, genomi design principles, connect, operating rule and fresh task flow.
Sponsio CLAUDE.md
Instructions for SponsioLabs/Sponsio, covering agent guide for sponsio, what sponsio is, positioning, what to read first and repository map.
holaOS CLAUDE.md
Claude Code instructions for holaboss-ai/holaOS, covering holaos — repo guide and hola — debug the hola (pi) brain from the cli.
nulnul-harness AGENTS.md
Instructions for SeoNaRu/nulnul-harness: This repository builds plugins/nulnul-harness/, a Codex plugin that finds proven capabilities, assembles the smallest useful project-local agent system, completes the user's work, and evolves it from measured outcomes without requiring users to operate a harness.
pixir AGENTS.md
Instructions for Ranvier-Technologies/pixir, covering agents.md - pixir harness, progressive discovery, screaming architecture, beta stance and commands.
spec-driven-development-template AGENTS.md
Instructions for juanklagos/spec-driven-development-template, covering mandatory reading order / orden obligatorio de lectura, mandatory workflow / flujo obligatorio, required reference / referencia obligatoria, final requirement / requisito final and uso explícito del repositorio base.