chat-sdk

chat-sdk is a skill for Claude Code from microsoft/skills-for-copilot-studio. It costs 40 tokens per session (569 once invoked), scanned A, original, MIT.

A tool for sending a message to a published Microsoft Copilot Studio agent through Microsoft's client software development kit. Copilot Studio is a service for creating AI agents, and Entra ID is Microsoft's identity and sign-in system.

In plain words
What is it for?
Use it to send one utterance, or user message, to an authenticated agent and read its returned messages and conversation details.
Why use it?
It lets you test an agent that uses company sign-in without needing direct access to its internal API.

Skill for Claude Code ✓ vendor

Written for Claude Code: allowed-tools in frontmatter. Also seen: agent in frontmatter.

Part of the copilot-studio plugin — 31 skills, 4 agents, 1 hook shipped together

Good fit Use it to send one utterance, or user message, to an authenticated…

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Install with agentmods
npx agentmods add skills/microsoft/skills-for-copilot-studio/chat-sdk
About the project

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.

microsoft/skills-for-copilot-studio · 430 stars · on GitHub

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.

Any agent
npx skills add microsoft/skills-for-copilot-studio --skill chat-sdk
Clone the repo
git clone --depth 1 https://github.com/microsoft/skills-for-copilot-studio

Made for: Claude Code.

Or install copilot-studio, the plugin that ships this one along with the rest of its 31 skills, 4 agents, 1 hook.

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 chat-sdk

README.md
[![agentmods](https://agentmods.dev/badge/skills/microsoft/skills-for-copilot-studio/chat-sdk.svg)](https://agentmods.dev/skills/microsoft/skills-for-copilot-studio/chat-sdk)
Your own site
<a href="https://agentmods.dev/skills/microsoft/skills-for-copilot-studio/chat-sdk"><img src="https://agentmods.dev/badge/skills/microsoft/skills-for-copilot-studio/chat-sdk.svg" alt="Measured on agentmods" height="20"></a>
Per session 40 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 569 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. 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 $0.00040 $0.00569
Opus 5 $0.00020 $0.00284
Sonnet 5 $0.00008 $0.00114
Haiku 4.5 $0.00004 $0.00057

Measured 7d ago against content hash 6461d52c9d6b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

chat-sdk 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.

skills/chat-sdk/SKILL.md · 65 lines

How it starts

The opening of the file, as written. The whole thing — 65 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Chat via Copilot Studio SDK

Send a single utterance to a published agent via the Copilot Studio Client SDK. Use this for agents with integrated authentication / Entra ID SSO (authenticationmode 2).

Prerequisites

Requires prior authentication via /copilot-studio:test-auth. Do NOT ask the user for a client ID yourself — the test-auth skill handles app registration setup and authentication.

Instructions

  1. Run the script with --client-id and the utterance from $ARGUMENTS:

    node ${CLAUDE_SKILL_DIR}/../../scripts/chat-with-agent.bundle.js \
      --client-id "<clientId>" "<utterance>" [--agent-dir <path>]
    
  2. Authentication: Requires prior authentication via /copilot-studio:test-auth. The token is cached in the "test-agent" slot and shared with the eval API. If auth fails or the SDK hangs, tell the caller to re-run test-auth.

  3. Parse the JSON output from stdout:

{
  "status": "ok",
  "protocol": "m365",
  "utterance": "hello",
  "conversation_id": "abc123-...",
  "start_activities": [ ... ],
  "activities": [ ... ]
}

Display the agent's response from the activities array:

  • Text: activities where type === "message" — show text
  • Suggested actions: suggestedActions.actions array
  • Adaptive cards: attachments with contentType === "application/vnd.microsoft.card.adaptive"

Save conversation_id for follow-ups.

Multi-turn

Pass --conversation-id from the previous response:

node ${CLAUDE_SKILL_DIR}/../../scripts/chat-with-agent.bundle.js \
  --client-id "<id>" "<follow-up>" --conversation-id "<id>"

SDK sessions do not expire as quickly as DirectLine. Reuse conversation_id automatically for follow-ups.

Error Handling

Error Cause Resolution
Authentication failed Wrong client ID or tenant Verify app registration and permissions
Could not obtain conversation_id Agent not published or wrong config Verify agent is published

Read the full file on GitHub · 65 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. 7d ago First seen · 65 lines · 40 tokens per session scan A 6461d52c9d6b

Subscribe to this mod's changes

chat-sdk is a skill published in the GitHub repository microsoft/skills-for-copilot-studio (430 stars, last pushed 3d ago), licensed MIT. It adds 40 tokens to every session and 569 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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