Borrowing it
Nothing to install: this file belongs to Starlight143/mcp-server-stage0-authorization. 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/Starlight143/mcp-server-stage0-authorization/main/AGENTS.mdgit clone --depth 1 https://github.com/Starlight143/mcp-server-stage0-authorizationWrote 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/starlight143/mcp-server-stage0-authorization/agents-md)<a href="https://agentmods.dev/instructions/starlight143/mcp-server-stage0-authorization/agents-md"><img src="https://agentmods.dev/badge/instructions/starlight143/mcp-server-stage0-authorization/agents-md.svg" alt="Measured on agentmods" 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 | $0.00902 | $0.00902 |
| Opus 5 | $0.00451 | $0.00451 |
| Sonnet 5 | $0.00180 | $0.00180 |
| Haiku 4.5 | $0.00090 | $0.00090 |
Grade A, and why
mcp-server-stage0-authorization 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 6d 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 — 111 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
This file provides context for AI agents working with this repository.
Project Overview
This is an MCP (Model Context Protocol) server that demonstrates server-side authorization using Stage0 runtime policy validation. The key insight: authorization boundaries belong in server-side tool handlers, NOT in prompts.
Repository Structure
mcp-server-stage0-authorization/
├── src/
│ ├── index.ts # MCP Server entry point (6 tools)
│ ├── stage0-client.ts # Stage0 API client with type-safe parsing
│ └── demo-*.ts # Demo scripts (ALLOW/DENY/DEFER)
├── tests/
│ ├── stage0-client.test.ts # 42 test cases
│ └── tools.test.ts # Tool integration tests
├── package.json # npm configuration
├── tsconfig.json # TypeScript configuration
├── vitest.config.ts # Test configuration
└── README.md # User documentation
Key Concepts
Authorization Context Fields
When calling Stage0, these context fields should be passed from upstream:
| Field | Description | Example Values |
|---|---|---|
actor_role |
Role of the entity performing the action | admin, developer, viewer |
approval_status |
Whether the action has been approved | approved, pending, none |
environment |
Target environment | production, staging, development |
resource_scope |
Scope of resources affected | all, team-a, service-x |
Verdict Types
- ALLOW: Execution permitted
- DENY: Execution blocked (high-risk side effects without guardrails)
- DEFER: Human review required (loop threshold exceeded, vague requests)
Side Effect Priority
DENY > DEFER > ALLOW
High-risk side effects (publish, deploy) take precedence over loop checks.
Available Tools
| Tool | Risk Level | Side Effects | Context-Aware |
|---|---|---|---|
research-topic |
Low | None | No |
publish-content |
High | publish |
No |
deploy-changes |
High | deploy |
Yes (actor_role) |
managed-deploy |
High | deploy |
Yes (all fields) |
retry-workflow |
Medium | loop |
Yes (retry_count) |
check-authorization |
N/A | None | Optional |
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.
- 6d ago First seen · 111 lines · 902 tokens per session scan A c40de0d060a1
mcp-server-stage0-authorization AGENTS.md is an instructions file published in the GitHub repository Starlight143/mcp-server-stage0-authorization (0 stars, last pushed 5mo ago), licensed MIT. It adds 902 tokens to every session, about $0.0045 per session on Opus 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.
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