agent-setup: Skill for Codex

.codex/skills/project-memory-enforcer/SKILL.md

project-memory-enforcer is a skill for Codex from jstxn/agent-setup. It costs 118 tokens per session (527 once invoked), scanned B, original, no licence file.

A preflight skill that makes an agent read project rules and stored project notes before changing code. AGENTS.md files contain repository instructions, while project-memory files record earlier decisions or context.

In plain words
What is it for?
Use it before code changes to find applicable AGENTS.md files and any project memory files in .codex/memories/.
Why use it?
It reduces the chance of ignoring local conventions or repeating mistakes when implementing, debugging, refactoring, or testing.

Skill for Codex

Written for Codex: installed under .codex/.

This is jstxn/agent-setup's own configuration. It tells Codex how to work on agent-setup 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 agent-setup configures →

Reuse

Borrowing it

Nothing to install: this file belongs to jstxn/agent-setup. 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/jstxn/agent-setup/main/.codex/skills/project-memory-enforcer/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/jstxn/agent-setup

Made for: Codex.

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 project-memory-enforcer

README.md
[![agentmods](https://agentmods.dev/badge/skills/jstxn/agent-setup/project-memory-enforcer/github.svg)](https://agentmods.dev/skills/jstxn/agent-setup/project-memory-enforcer)
Your own site
<a href="https://agentmods.dev/skills/jstxn/agent-setup/project-memory-enforcer"><img src="https://agentmods.dev/badge/skills/jstxn/agent-setup/project-memory-enforcer/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.

agentmods 80×15 button for project-memory-enforcer

Your own site · 80×15
<a href="https://agentmods.dev/skills/jstxn/agent-setup/project-memory-enforcer"><img src="https://agentmods.dev/badge/skills/jstxn/agent-setup/project-memory-enforcer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 118 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 527 The whole file, excluding the scripts and references it only reads on demand.
Security scan B 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 $0.00118 $0.00527
Opus 5.5 $0.00047 $0.00211
Sonnet 5.5 $0.00024 $0.00105
Haiku 4.5 $0.00012 $0.00053

Measured 2mo ago against content hash 90a48bed4450, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade B, and why

project-memory-enforcer scanned grade B 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 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.

Reads agent configuration directoriesmediumAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

- Project memory notes: `find .codex/memories -name '*.md' 2>/dev/null`
.codex/skills/project-memory-enforcer/SKILL.md · 45 lines

The source is not reproduced here

A licence we could not identify

The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.

Read it on GitHub

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. 2mo ago First seen · 45 lines · 118 tokens per session scan B 90a48bed4450

Subscribe to this mod's changes

project-memory-enforcer is a skill published in the GitHub repository jstxn/agent-setup (2 stars, last pushed 8mo ago), with no licence file. It adds 118 tokens to every session and 527 once invoked, about $0.0005 per session on Opus 5.5. A static security scan graded it B with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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