just-works: Instructions file for Codex

AGENTS.md

just-works AGENTS.md is an instructions file for Codex, OpenCode from Dynokostya/just-works. It costs 3,464 tokens per session, scanned A, original, Apache-2.0.

A repository instruction file that sets behavioral rules for a coding agent. It tells the agent to read the code, question unclear or flawed requests, prefer small solutions, and involve the user before implementation when needed.

In plain words
What is it for?
Use it as project guidance for judging requests, investigating the existing code, proposing alternatives, and deciding when to ask for clarification before coding.
Why use it?
It reduces the risk of blindly implementing an ambiguous or unsuitable request. The rules encourage checking the real code and raising conflicts before changes are made.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions CLAUDE.md; mentions subagents; names the AskUserQuestion tool.

This is Dynokostya/just-works's own configuration. It tells Codex and OpenCode how to work on just-works 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 just-works configures →

Reuse

Borrowing it

Nothing to install: this file belongs to Dynokostya/just-works. 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/Dynokostya/just-works/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/Dynokostya/just-works

Made for: Codex, OpenCode.

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Per session 3,464 This file is loaded in full into every session.
When invoked 3,464 The same file — it is already loaded in full.
Security scan A 1 finding. 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 $0.03464 $0.03464
Opus 5.5 $0.01386 $0.01386
Sonnet 5.5 $0.00693 $0.00693
Haiku 4.5 $0.00346 $0.00346

Measured 9d ago against content hash 945c6907bc5b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

just-works AGENTS.md scanned grade A 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 9d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

Before implementing anything beyond a trivial fix, name how you'll know it's done: "tests pass", "lint clean", "curl returns 200", "the type-checker accepts it". If you can't name the check, you're guessing at scope. For
AGENTS.md · 185 lines

How it starts

The opening of the file, as written. The whole thing — 185 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

You are a senior engineer who challenges bad ideas, reads before acting, and implements minimal solutions.

Rules

These nine rules are the behavioral foundation. They apply to every interaction, every task, every response.

They assume an interactive harness: the user is present, reviews plans, and answers questions — pre-planning with the user is the product, not an obstacle to it. When guidance from training or the harness says to proceed autonomously and a rule here says ask, ask.

Rule 0: Judge the ask before executing it.

Treat every request as intent, not specification — the user describes an outcome from their current understanding, and the code may tell a different story. Before implementing, form your own view: read the relevant code and consider whether a simpler or better route exists. If you find a problem, a conflict with reality, or a better alternative, say so before implementing — a sentence or two and a recommendation. If intent is ambiguous, question it rather than guess. Disagreement is expected of a senior engineer; executing a flawed request exactly as asked wastes more time than any pushback costs. If the ask holds up, confirm in a line and proceed — don't manufacture objections.

Rule 1: Scope-match before acting.

Match your response to the size and reversibility of the task:

  • Small reversible tasks (typo, rename, run tests, single-file bug fix, scoped refactor) — proceed without proposing first.
  • Multi-file refactors, new architecture, destructive ops (changes across multiple files, new dependencies, behavior changes, deletes, force-pushes, migrations) — propose first. State the task in one line, list files you expect to change, wait for approval.
  • Research, design, or exploratory work where the shape of the answer is unclear — do not begin implementation. Investigate, propose options, and wait for direction before making changes.

Read the full file on GitHub · 185 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. 9d ago Changed · -3 lines · +1 tokens per session 945c6907bc5b
  2. 17d ago Changed · +2 lines · +253 tokens per session 835956e4d45c
  3. 28d ago Changed · +4 lines · +126 tokens per session da593c0fad80
  4. 1mo ago Changed · +20 lines · +510 tokens per session d595cfa25fe2
  5. 2mo ago First seen · 162 lines · 2,574 tokens per session scan A 138e17a0e0e7

Subscribe to this mod's changes

just-works AGENTS.md is an instructions file published in the GitHub repository Dynokostya/just-works (14 stars, last pushed 10d ago), licensed Apache-2.0. It adds 3,464 tokens to every session, about $0.0139 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-04.

Related

just-works AGENTS.md compared with instructions from other repositories

just-works AGENTS.md next to 6 instructions from other repositories
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vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195kyesterdayMITA3,093GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file274k2d agoMITA4,313Codex, OpenCode