smt-sudoku-mcp: Instructions file for Codex

AGENTS.md

smt-sudoku-mcp AGENTS.md is an instructions file for Codex, OpenCode from anirbanbasu/smt-sudoku-mcp. It costs 1,478 tokens per session, scanned A, original, MIT.

Project-specific instructions for coding agents working on smt-sudoku-mcp, a Sudoku server that uses mathematical constraints to generate, check, and solve puzzles.

In plain words
What is it for?
Use them while developing or reviewing smt-sudoku-mcp, especially for formatting, type checks, tests, security scans, and running the server.
Why use it?
They tell an agent which project commands, tools, and verification checks to use when changing that repository.

Instructions file for CodexOpenCode

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

This is anirbanbasu/smt-sudoku-mcp's own configuration. It tells Codex and OpenCode how to work on smt-sudoku-mcp 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 smt-sudoku-mcp configures →

Reuse

Borrowing it

Nothing to install: this file belongs to anirbanbasu/smt-sudoku-mcp. 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/anirbanbasu/smt-sudoku-mcp/master/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/anirbanbasu/smt-sudoku-mcp

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 smt-sudoku-mcp AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/anirbanbasu/smt-sudoku-mcp/agents-md/github.svg)](https://agentmods.dev/instructions/anirbanbasu/smt-sudoku-mcp/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/anirbanbasu/smt-sudoku-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/anirbanbasu/smt-sudoku-mcp/agents-md/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 smt-sudoku-mcp AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/anirbanbasu/smt-sudoku-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/anirbanbasu/smt-sudoku-mcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,478 This file is loaded in full into every session.
When invoked 1,478 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 $0.01478 $0.01478
Opus 5.5 $0.00591 $0.00591
Sonnet 5.5 $0.00296 $0.00296
Haiku 4.5 $0.00148 $0.00148

Measured 1mo ago against content hash d62b22d22ead, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

smt-sudoku-mcp 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 1mo 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 · 62 lines

How it starts

The opening of the file, as written. The whole thing — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

This file provides guidance to coding agents (Claude Code, Codex, and similar tools) when working with code in this repository.

Project

smt-sudoku-mcp: an MCP server demonstrating SMT/Z3 constraint solving via Sudoku. Four tools: generating a puzzle, validating a partial grid, validating a full solution, and solving a puzzle (or reporting why it cannot be solved).

Commands

uv manages the Python 3.13 environment — do not use pip directly. Commands run either via plain uv run or the justfile (just -l lists every recipe).

just install              # sync minimal (runtime-only) dependencies
just install-all          # sync all dependency groups (dev, test)
just format                # ruff format + ruff check --fix
just type-check             # uv run ty check
just test-coverage           # pytest (via coverage) across tests/, then coverage report
just launch-inspector        # run the MCP Inspector against the server (needs nvm/node)
just run-streamable-http      # run the server over streamable-http, for use with the Inspector
just vulnerability-scan       # osv-scanner over the source tree
just install-pre-commit-hooks / just pre-commit-update  # manage hooks via `prek`, not `pre-commit`

Run a single test:

uv run pytest tests/test_sudoku.py::TestSolvePuzzle::test_satisfiable -v

just test-coverage enforces fail_under = 100 (see [tool.coverage.report] in pyproject.toml); use # pragma: no cover for genuinely unreachable branches rather than writing tests around them. Running a single test with plain pytest/uv run pytest skips the coverage gate, which is expected during iterative development.

Ruff (line length 120, Google-style docstrings, isort, pyupgrade, complexity ≤ 15) and ty are also run by pre-commit hooks (.pre-commit-config.yaml), installed with prek, not the pre-commit CLI.

Architecture

Core logic (sudoku.py)

src/smt_sudoku_mcp/sudoku.py holds the SudokuGrid/Cell/result Pydantic models and all Z3 encoding, generation, validation, and solving logic. It has no FastMCP import at all, so it can be exercised directly in tests without going through the MCP protocol. Cell coordinates are 0-indexed internally (rows[r][c]), but any output field that names a specific cell (e.g. Cell) reports 1-indexed row/col, matching how Sudoku cells are conventionally described in text.

Read the full file on GitHub · 62 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. 1mo ago Changed · +55 tokens per session d62b22d22ead
  2. 1mo ago First seen · 62 lines · 1,423 tokens per session scan A 72b0c968f320

Subscribe to this mod's changes

smt-sudoku-mcp AGENTS.md is an instructions file published in the GitHub repository anirbanbasu/smt-sudoku-mcp (0 stars, last pushed today), licensed MIT. It adds 1,478 tokens to every session, about $0.0059 per session on Opus 5.5. 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.

Related

Other instructions, from other repositories

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 9,715 tokens

next.js AGENTS.md

AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.

vercel/next.js · 7,461 tokens

vscode oss-third-party-notices.instructions.md

Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).

microsoft/vscode · 5,262 tokens

langchain AGENTS.md

AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.

langchain-ai/langchain · 4,680 tokens

vscode copilot-instructions.md

Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).

microsoft/vscode · 2,731 tokens

deepseek-harness AGENTS.md

AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.

deepseek-ai/deepseek-harness · 4,261 tokens