Skills for Copilot Studio is a plugin for authoring, testing, and troubleshooting standard Microsoft Copilot Studio agents as YAML files from a terminal or editor. It is intended for users of Claude Code, GitHub Copilot CLI, and VS Code who work with Copilot Studio agents. The catalogue add-ons are the plugin's skills, agents, hook, and plugin definition.
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.
npx skills add microsoft/skills-for-copilot-studio --skill detect-modegit clone --depth 1 https://github.com/microsoft/skills-for-copilot-studioWrote 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/skills/microsoft/skills-for-copilot-studio/detect-mode)<a href="https://agentmods.dev/skills/microsoft/skills-for-copilot-studio/detect-mode"><img src="https://agentmods.dev/badge/skills/microsoft/skills-for-copilot-studio/detect-mode.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 | $0.00031 | $0.00493 |
| Opus 5 | $0.00015 | $0.00246 |
| Sonnet 5 | $0.00006 | $0.00099 |
| Haiku 4.5 | $0.00003 | $0.00049 |
Grade A, and why
detect-mode 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 7d 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.
What it actually says
Detect Agent Authentication Mode
Query the Dataverse bots entity to determine whether the agent uses DirectLine (no auth / manual auth) or the Copilot Studio SDK (integrated auth / Entra ID SSO).
Instructions
-
Run the detect-only command:
node ${CLAUDE_SKILL_DIR}/../../scripts/chat-with-agent.bundle.js --detect-only $ARGUMENTSIf the agent is not at the project root, pass
--agent-dir <path>. -
Parse the JSON output from stdout:
DirectLine mode (authenticationmode 1 or 3)
{ "status": "ok", "mode": "directline", "authenticationmode": 1, "tokenEndpoint": "https://...", "schemaName": "..." }The agent uses no authentication or manual authentication. No user credentials needed. The
tokenEndpointis ready to use with/copilot-studio:chat-directline.M365 mode (authenticationmode 2)
{ "status": "ok", "mode": "m365", "authenticationmode": 2, "schemaName": "..." }The agent uses integrated authentication (Entra ID SSO). An App Registration Client ID is needed for
/copilot-studio:chat-sdk. -
Return the result to the caller. Do not proceed to chat — that is a separate step.
Error Handling
| Error | Cause | Resolution |
|---|---|---|
No agent.mcs.yml found |
No agent in workspace | Clone the agent first |
No .mcs/conn.json found |
Agent not cloned via VS Code extension | Clone with the extension |
Could not detect authentication mode |
No cached Dataverse token | Run a push/pull first to cache tokens, or ask the user about their auth config |
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.
- 7d ago First seen · 46 lines · 31 tokens per session scan A 47f383679d50
detect-mode is a skill published in the GitHub repository microsoft/skills-for-copilot-studio (430 stars, last pushed 3d ago), licensed MIT. It adds 31 tokens to every session and 493 once invoked, about $0.0002 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 2026-08-30.
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