agentmods.dev

SerpentStack copilot-instructions.md

Project-specific instructions for SerpentStack, a command-line tool that finds and installs AI-agent skills and servers, plus a full-stack project template. They describe its code structure, conventions, and main commands.

In plain words
What is it for?
Use them when developing the SerpentStack command-line tool, its FastAPI and React template, or its background-agent features.
Why use it?
They help an agent make changes that fit SerpentStack's existing architecture and rules.

Instructions file for GitHub Copilot

2 5mo ago A scan 770 tokens original MIT
View the source file Benja-Pauls/SerpentStack
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add instructions/benja-pauls/serpentstack/copilot-instructions
Clone the repo
git clone --depth 1 https://github.com/Benja-Pauls/SerpentStack

Made for: GitHub Copilot.

Per session 770 This file is loaded in full into every session.
When invoked 770 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
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 $0.00770 $0.00770
Opus 5 $0.00385 $0.00385
Sonnet 5 $0.00154 $0.00154
Haiku 4.5 $0.00077 $0.00077

Measured 2d ago against content hash 912fa20dca39, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

SerpentStack copilot-instructions.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 2d 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.

.github/copilot-instructions.md · 70 lines

How it starts

The opening of the file, as written. The whole thing — 70 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SerpentStack — GitHub Copilot Instructions

You are working on SerpentStack, a CLI that searches for AI agent skills and MCP servers across every major registry. It also includes a production fullstack template (FastAPI + React + PostgreSQL + Terraform) and persistent background agents.

CLI Architecture

The CLI (cli/) is the primary product. It has zero npm dependencies — Node.js built-ins only.

cli/
  bin/serpentstack.js       # Entry point, argument parsing, command routing
  lib/
    commands/
      search.js             # Cross-registry skill + MCP server search
      add.js                # Install skills from any source
      discover.js           # Project-aware recommendations (detects stack, queries registries)
      skills-init.js        # Download base skills
      skills-update.js      # Update base skills
      persistent.js         # Persistent agent setup + management
      notifications.js      # View agent findings
      stack-new.js          # Scaffold new project from template
      stack-update.js       # Update template files
    utils/
      registries.js         # Registry adapters (Anthropic, skills.sh, awesome, GitHub, MCP)
      ui.js                 # Terminal formatting, colors, spinners, branded output
      config.js             # Project detection and config management
      models.js             # Ollama model detection and management
      agent-utils.js        # OpenClaw workspace management
      github.js             # GitHub API helpers
      fs-helpers.js         # File system utilities

Key Conventions

CLI

  • Zero dependencies — use only Node.js built-ins (fetch, fs, path, readline, etc.)
  • All registry adapters return { name, source, type, description, url, install, stars?, author?, _score }[]
  • type is either 'skill' or 'mcp'
  • Scoring: 0-100 relevance score with source-weighted multipliers
  • Results are deduplicated by normalized name within each type (skills and MCP are separate)
  • MCP server entries include mcpUrl for the install command and tags for scoring
  • UI uses the snake brand (green theme, printHeader(), divider(), spinner())

Read the full file on GitHub · 70 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. 2d ago First seen · 70 lines · 770 tokens per session scan A 912fa20dca39

Subscribe to this mod's changes

SerpentStack copilot-instructions.md is an instructions file published in the GitHub repository Benja-Pauls/SerpentStack (2 stars, last pushed 5mo ago), licensed MIT. It adds 770 tokens to every session, about $0.0038 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.

agent-skillsaiclaude-codeclicodexdeveloper-tools
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