What is agents-sdk-typescript-debugging?

A troubleshooting guide for agents built with Microsoft's Agents SDK, a software toolkit for creating message-driven AI agents in TypeScript.

Use it to check TypeScript builds, start-up crashes, listening ports, .env settings, Azure AD authentication, and local end-to-end tests in the Agents Playground.

It provides an ordered way to find whether the problem is in the build, startup, network access, environment settings, or Azure AD credentials.

agents-sdk-typescript-debugging — Skill by microsoft

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 skills/microsoft/agents/agents-sdk-typescript-debugging

Any agent

npx skills add microsoft/Agents --skill agents-sdk-typescript-debugging

Clone the repo

git clone --depth 1 https://github.com/microsoft/Agents

Made for: Claude Code, Codex.

Per session 125 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,397 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. 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.

Model	Per session	Once invoked
Fable 5	$0.00125	$0.02397
Opus 5	$0.00063	$0.01198
Sonnet 5	$0.00025	$0.00479
Haiku 4.5	$0.00013	$0.00240

Measured 2d ago against content hash 78e1a1bef43e, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

agents-sdk-typescript-debugging 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 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.

Makes network callslowCapability

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

curl -s -o /dev/null -w "%{http_code}" \

agent-plugins/agents-for-js/skills/agents-sdk-typescript-debugging/SKILL.md · 286 lines

How it starts

The opening of the file, as written. The whole thing — 286 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Debugging Agents Built with Microsoft Agents SDK

Overview

Most agent failures fall into one of three categories: the code doesn't build or start, the configuration is wrong, or the agent isn't reachable. Work through this checklist in order — each step confirms a prerequisite for the next.

Checklist

You MUST create a task for each of these items and complete them in order:

Make sure the code builds successfully.
Make sure the application starts and runs without crashing.
Make sure the application opens a port and listens for incoming requests.
Validate the .env configuration.
Validate the bot's credentials against Azure AD.
Use the Agents Playground to test the agent end-to-end locally.

1. Build the code

npm run build

Expected: exits with code 0, no errors. Fix any TypeScript or import errors before continuing.

2. Start the application

Run with debug logging enabled to get detailed output from the SDK internals:

DEBUG=agents:* npm start

Or for anonymous local dev:

DEBUG=agents:* node ./dist/index.js

The DEBUG=agents:* flag enables verbose logging across all SDK namespaces. Scope down to reduce noise:

DEBUG=agents:* npm start                    # everything
DEBUG=agents:authorization:* npm start      # all auth (most useful starting point)
DEBUG=agents:msal npm start                 # token acquisition only

Auth & connections

Namespace	What it logs
`agents:authorization:connections`	Auth connections loaded at startup (clientId, tenantId, authType); which connection is selected per request
`agents:authorization:manager`	Auth handlers configured at startup (type, scopes); which handler is invoked per request
`agents:authorization:azurebot`	Azure Bot sign-in flow detail (token exchange, magic code, SSO)
`agents:authorization:agentic`	Agentic auth flow detail (token acquisition, OBO)
`agents:authorization`	High-level authorization middleware decisions
`agents:msal`	MSAL token acquisition (token requests, cache hits, OBO)
`agents:jwt-middleware`	Incoming JWT validation
`agents:authConfiguration`	Auth configuration loading

Read the full file on GitHub · 286 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.

2d ago First seen · 286 lines · 125 tokens per session scan A 78e1a1bef43e

Subscribe to this mod's changes

agents-sdk-typescript-debugging is a skill published in the GitHub repository microsoft/Agents (1,050 stars, last pushed 5d ago), licensed MIT. It adds 125 tokens to every session and 2,397 once invoked, about $0.0006 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 2026-08-30.

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