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mcp-for-postgres-db-demo: Instructions file for Codex

AGENTS.md

mcp-for-postgres-db-demo AGENTS.md is an instructions file for Codex, OpenCode from pamelafox/mcp-for-postgres-db-demo. It costs 273 tokens per session, scanned A, original, MIT.

A set of coding instructions for the mcp-for-postgres-db-demo project, including Python style rules, dependency installation steps, and testing guidance. The project demonstrates an MCP connection to a PostgreSQL database.

In plain words
What is it for?
Use it when modifying this Python project, adding application or development dependencies, or running its tests. Follow it before changing code or project configuration.
Why use it?
It keeps changes consistent with the repository's conventions and avoids common mistakes such as placing imports inside functions or adding dependencies to the wrong section.

Instructions file for CodexOpenCode

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

This is pamelafox/mcp-for-postgres-db-demo's own configuration. It tells Codex and OpenCode how to work on mcp-for-postgres-db-demo 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 mcp-for-postgres-db-demo configures →

not rated 12repo 2mo ago A scan 273 tokens original MIT
View source ↗ pamelafox/mcp-for-postgres-db-demo pamelafox.github.io
Reuse

Borrowing it

Nothing to install: this file belongs to pamelafox/mcp-for-postgres-db-demo. 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/pamelafox/mcp-for-postgres-db-demo/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/pamelafox/mcp-for-postgres-db-demo

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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README.md
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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.

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Per session 273 This file is loaded in full into every session.
When invoked 273 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 $0.00273 $0.00273
Opus 5.5 $0.00109 $0.00109
Sonnet 5.5 $0.00055 $0.00055
Haiku 4.5 $0.00027 $0.00027

Measured 2mo ago against content hash 7d83fff6851d, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

mcp-for-postgres-db-demo 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 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.

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 · 37 lines

What it actually says

Instructions for coding agents

  • Do not add comments indicating something you have removed, simply remove it and be done with it.
  • Similarly, do not add comments indicating something you have changed; just make the change.
  • If you are asked to copy a file, do a file copy and delete the old file.

Python conventions

  • All imports go at the TOP of the file, do NOT import inside functions or if statements.
  • Do NOT use excessive try/catch statements, only use try/catch when explicitly requested. Most exceptions should propagate and become runtime errors.
  • Use type annotations only for function definitions, do NOT use for variables or attributes.
  • Do NOT add "pragma: no cover" or similar coverage-ignore comments, unless explicitly requested.

Adding new dependencies

If the dependency is for the application (not for dev or testing):

  • Add the new dependency to the [project.dependencies] list in pyproject.toml.

  • Install the new dependencies:

    uv sync

If the dependency is for development or testing:

  • Add the new dependency to the [dependency-groups] dev list in pyproject.toml.
  • Install the new dependencies: uv sync --group dev

Running tests

Install the dev requirements:

uv sync --group dev

Then run the tests with:

uv run python -m pytest

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 · 37 lines · 273 tokens per session scan A 7d83fff6851d

Subscribe to this mod's changes

mcp-for-postgres-db-demo AGENTS.md is an instructions file published in the GitHub repository pamelafox/mcp-for-postgres-db-demo (12 stars, last pushed 2mo ago), licensed MIT. It adds 273 tokens to every session, about $0.0011 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 2026-08-30.

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