# Dotnet Sentinel Test > Test-only skill for verifying sibling file access in Copilot CLI Use when this capability is needed. - Skill: `tomevault-io/dotnet-sentinel-test` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/dotnet-sentinel-test` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/dotnet-sentinel-test/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/dotnet-sentinel-test --- # dotnet-sentinel-test Test-only skill used by Copilot activation smoke tests to verify progressive disclosure via sibling file access. ## Scope - Verifying that Copilot CLI can read sibling files referenced from a skill - Testing progressive disclosure of content through file references ## Out of scope - Production .NET guidance (this is a test fixture only) ## Usage When asked about the sentinel test, read the sibling reference file for detailed context. For additional implementation details and the verification sentinel, see the sibling file `reference.md` in this skill directory. --- > Source: [novotnyllc/dotnet-artisan](https://github.com/novotnyllc/dotnet-artisan) — distributed by [TomeVault](https://tomevault.io).