Borrowing it
Nothing to install: this file belongs to charistas/posokanei-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.
curl -O https://raw.githubusercontent.com/charistas/posokanei-mcp/main/AGENTS.mdgit clone --depth 1 https://github.com/charistas/posokanei-mcpWrote 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.
[](https://agentmods.dev/instructions/charistas/posokanei-mcp/agents-md)<a href="https://agentmods.dev/instructions/charistas/posokanei-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/charistas/posokanei-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.
<a href="https://agentmods.dev/instructions/charistas/posokanei-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/charistas/posokanei-mcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00862 | $0.00862 |
| Opus 5.5 | $0.00345 | $0.00345 |
| Sonnet 5.5 | $0.00172 | $0.00172 |
| Haiku 4.5 | $0.00086 | $0.00086 |
Grade A, and why
posokanei-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.
How it starts
The opening of the file, as written. The whole thing — 91 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Repository Guidance
Project Overview
posokanei-mcp is an unofficial read-only MCP server for supermarket product and price data from PosoKanei.
It is published as the posokanei-mcp npm package and registered as io.github.charistas/posokanei-mcp in the MCP Registry.
This project is not affiliated with, endorsed by, or operated by PosoKanei, gov.gr, or any Greek public authority.
Commands
On this laptop, use socket npm / socket npx for registry installs, updates, resolution, and package execution. Plain npm run (and npm test) may run checked-in local scripts; nested registry operations must still use Socket. If Socket is unavailable or blocks an operation, report the blocker rather than bypassing it. On other hosts, follow their approved package security workflow.
Requires Node.js >=20.
socket npm install
npm run build
npm run typecheck
npm test
There is no lint script. Do not invent one as a required verification gate.
The test suite mocks PosoKanei API calls. Do not add required tests that depend on live PosoKanei network access.
Source Conventions
- Edit
src/, notdist/.dist/is generated and ignored. - Keep TypeScript ESM style consistent with the existing files.
- Prefer Node built-ins and the official MCP SDK over new runtime dependencies.
- Keep changes small and directly tied to the task.
- If adding a runtime dependency is unavoidable, justify license compatibility, maintenance, security posture, and install footprint.
MCP And API Safety
- Keep the server read-only.
- Do not add write, form-submission, account, auth-bypass, or mutation tools without an explicit design discussion.
- Treat PosoKanei endpoints as public but undocumented. Keep requests modest, cache-friendly, and rate-limited.
- Bound list, tree, search, and comparison responses so a single tool call cannot flood the client with huge JSON.
- Tool descriptions must be precise and must not imply official government affiliation.
- Keep API errors visible for transient or service-level failures.
- Only treat missing resources as unmatched user input when the API clearly returns a not-found condition.
- Preserve explicit constructor options over environment defaults.
- Keep rate limiting serialized for concurrent requests.
- Keep cache behavior deterministic and easy to disable in tests.
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.
- 1mo ago Changed · +3 lines · +83 tokens per session 278e06a3d784
- 2mo ago First seen · 88 lines · 779 tokens per session scan A 62f2688ad517
posokanei-mcp AGENTS.md is an instructions file published in the GitHub repository charistas/posokanei-mcp (5 stars, last pushed 11d ago), licensed MIT. It adds 862 tokens to every session, about $0.0034 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.
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).
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.
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).
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.
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.
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).