comet-boundary: Skill for Claude Code

.agents/skills/testing-comet-boundary/SKILL.md

testing-comet-boundary is a skill for Claude Code, Codex from arsenyspb/comet-boundary. It costs 37 tokens per session (1,249 once invoked), scanned A, original, Apache-2.0.

An end-to-end test procedure for Comet Boundary, an access-control system that brokers SSH connections to servers. It checks the complete path from user login to server access.

In plain words
What is it for?
Use it to start the required Docker services and verify login, user separation, and SSH access to multiple targets.
Why use it?
It helps find broken credential handling, incorrect role-based access control, or unhealthy services before they affect users.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one. Also seen: installed under .agents/ (shared by several agents).

This is arsenyspb/comet-boundary's own configuration. It tells Claude Code and Codex how to work on comet-boundary 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 comet-boundary configures →

Needs its repository: it runs a file that does not travel with it, so clone the repository first. The line is bash scripts/01_setup-boundary.sh.

Reuse

Borrowing it

Nothing to install: this file belongs to arsenyspb/comet-boundary. 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/arsenyspb/comet-boundary/main/.agents/skills/testing-comet-boundary/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/arsenyspb/comet-boundary

Made for: Claude Code, Codex.

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 testing-comet-boundary

README.md
[![agentmods](https://agentmods.dev/badge/skills/arsenyspb/comet-boundary/testing-comet-boundary.svg)](https://agentmods.dev/skills/arsenyspb/comet-boundary/testing-comet-boundary)
Your own site
<a href="https://agentmods.dev/skills/arsenyspb/comet-boundary/testing-comet-boundary"><img src="https://agentmods.dev/badge/skills/arsenyspb/comet-boundary/testing-comet-boundary.svg" alt="Measured on agentmods" height="20"></a>
Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,249 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. 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 $0.00037 $0.01249
Opus 5 $0.00018 $0.00624
Sonnet 5 $0.00007 $0.00250
Haiku 4.5 $0.00004 $0.00125

Measured 8d ago against content hash 0b55061d640a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

testing-comet-boundary scanned grade A with 1 finding 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 8d 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.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -s -X POST \
.agents/skills/testing-comet-boundary/SKILL.md · 117 lines

How it starts

The opening of the file, as written. The whole thing — 117 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Testing Comet Boundary

Prerequisites

  • Docker and Docker Compose v2 must be available
  • The Makefile uses docker-compose (hyphenated) but newer systems only have docker compose (space). If make replay fails with "No such file or directory", use docker compose commands directly.

Environment Setup

The project uses Docker Compose with these services:

  • postgres — Boundary database
  • openldap — LDAP directory for alice/bob users
  • setup — Database initialization (runs once)
  • controller — Boundary controller (port 9200)
  • worker — Boundary worker (port 9202)
  • ssh-target-1, ssh-target-2 — SSH targets
  • backend — Go BFF (port 8080 internal)
  • frontend — React/Vite app (port 5173)

Startup Sequence (if make replay doesn't work)

cd /path/to/comet-boundary
docker compose down -v
rm -f .env client/.env.local
docker compose up -d postgres openldap setup
docker wait comet-boundary-setup-1
docker compose up -d controller worker ssh-target-1 ssh-target-2
# Wait for controller to be healthy
bash scripts/01_setup-boundary.sh
docker compose up -d --build backend frontend

Verify All Services Healthy

docker compose ps  # All should show "healthy" or "Up"

Test Credentials

  • Boundary Admin: username admin, password from setup script output (look for "Discovered Admin Password: ...")
  • LDAP Users: alice / changeme (Team A), bob / changeme (Team B)
  • SSH credential (brokered): username boundary-user, password password — stored in Boundary's Static Credential Store

Key Test Scenarios

1. Credential Store Verification (Boundary Admin UI, port 9200)

  1. Log in as admin at http://localhost:9200
  2. Navigate: Generated org scope → Generated project scope → Credential Stores
  3. Verify "SSH Credential Store" exists (type: Static)
  4. Click into it → Credentials tab → verify "SSH Target Credential" exists (type: Username & Password)
  5. Navigate to Targets → "A Team Host" → Brokered Credentials tab → verify credential is linked
  6. Same for "B Team Host"

Read the full file on GitHub · 117 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. 8d ago First seen · 117 lines · 37 tokens per session scan A 0b55061d640a

Subscribe to this mod's changes

testing-comet-boundary is a skill published in the GitHub repository arsenyspb/comet-boundary (5 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 37 tokens to every session and 1,249 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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