Teams App Developer
MicrosoftOfficialPublished by Microsoft
- Skill
- Tool integration
- Software development
- MIT
- Medium risk
AutoGineer summary
Written by AutoGineer from the skill’s own files, not by the author
The teams-app-developer skill provides a structured framework for managing the lifecycle of Microsoft 365 agents and Teams applications. It leverages the ATK CLI to handle project scaffolding, local testing via the Agents Playground, cloud provisioning on Azure, and troubleshooting. The skill includes specialized guidance for migrating Slack bots to Teams, including converting Block Kit UI to Adaptive Cards, and provides access to an extensive library of micro-expert documentation for cross-platform development.
What it does
- Scaffolds new Microsoft 365 agents and Teams applications from templates.
- Facilitates local testing using the Agents Playground or Teams-specific environments.
- Automates Azure resource provisioning and cloud deployment workflows.
- Provides diagnostic procedures for common authentication and configuration errors.
- Supports migration of Slack bots to the Teams platform.
- Manages project configuration and environment variables for ATK-based projects.
When to use it
- When starting a new Teams app, bot, or Declarative Agent project.
- When you need to test an agent locally before deploying to the cloud.
- When migrating existing Slack bots to the Microsoft Teams ecosystem.
- When troubleshooting deployment or authentication issues in a Teams project.
- When you need to provision Azure infrastructure for a Teams application.
Advantages
- Streamlines the development lifecycle with standardized CLI commands.
- Reduces development time by offering a local testing playground.
- Provides expert-level guidance for complex cross-platform migrations.
- Ensures consistent configuration management across development environments.
- Includes robust error-handling protocols for common platform-specific pitfalls.
Usage examples
- “Create a new Teams bot project using the default template.”
- The agent will initialize a new project folder, configure the necessary YAML files, and guide you through the initial setup using the ATK CLI.
- “How do I migrate my Slack bot to Microsoft Teams?”
- The agent will initiate the slack-to-teams workflow, providing access to cross-platform bridging experts and guidance on converting UI components.
- “My Teams bot is returning a 401 error, how do I fix it?”
- The agent will trigger the troubleshooting workflow, checking your environment variables, tunnel status, and authentication configuration.
Install
Download the skill as a ZIP:
https://mp-staging.autogineer.com/agent-skills/microsoft/teams-app-developer/downloadUnzip it into the cross-client skills folder of your project:
mkdir -p .agents/skills && unzip teams-app-developer.zip -d .agents/skills
Documentation by Microsoft
Microsoft 365 Agents Toolkit Skill
Build Microsoft 365 agents and Teams apps using the ATK CLI.
AI Behavior Guidelines
Testing Strategy: Recommend Agents Playground first (faster, no M365 needed). Use Teams workflow only if user explicitly requests it.
Environment Variables: NEVER hardcode secrets or make up placeholder values. Always ask users for real values.
Error Handling: Read error messages carefully. Check
env/.env.local,.localConfigs, andatk auth list. Common pitfalls:AADSTS7000229→aadApp/createmissinggenerateServicePrincipal: truein YAML — add it and re-provisionMissing
TENANT_IDin.localConfigs→ SDK uses wrong token authority → 401 from Bot Connector401 persists after auth fix → devtunnel URL may be blacklisted — create a fresh tunnel
See troubleshoot/troubleshoot.md for full diagnostic steps
Long-Running Commands — WAIT for completion:
atk new,atk provision,atk deploycan take several minutesAlways wait for completion before running the next step (timeout 120000ms+)
Local Service Startup — Hangs terminal (expected):
npm run dev,npm start,python app.py,devtunnel host, etc. will hang — the process keeps running indefinitelyALWAYS run as a background process (
isBackground=true) — NEVER useisBackground=falsefor these commandsDo NOT wait for it to "finish" — verify startup by checking output for "listening on port" or tunnel URL
If errors appear, read logs, diagnose, fix, restart
Use a NEW terminal to launch Agents Playground or open Teams sideloading URL
Monitor App Logs: Periodically check background terminal output for runtime errors. If the app crashes, read the error, fix the root cause, and restart.
Telemetry Tagging: Before running any
atkCLI commands, set the session environment variable so all CLI invocations are tagged as skill-initiated:export ATK_CLI_SKILL=trueRun this once at the start of the session. All subsequent
atkcommands in the same terminal will inherit it.
ATK CLI Setup
atk --version # Must be > 1.1.5-betaIf ATK is not found or version is too old:
npm i -g @microsoft/m365agentstoolkit-cli@betaCLI Global Options
| Option | Meaning | Recommendation |
|---|---|---|
-i | Interactive mode | Always use -i false in automation to avoid hanging |
-f | Project folder | Default to be current directory, used when specifying a custom folder. When scaffolding a new project, this is the parent folder where the project folder will be created under. |
-h | Command help | Use atk <command> -h for quick syntax checks |
Sub-Skills
| Sub-Skill | When to Use | Reference |
|---|---|---|
| create-project | Scaffold new project from template, choose template, atk new | create-project/create-project.md |
| test-playground | Test locally with Agents Playground, agentsplayground, quick testing | test-playground/test-playground.md |
| test-teams | Run on Teams, devtunnel, sideload, Teams testing, test in Copilot | test-teams/test-teams.md |
| provision-deploy | Provision Azure resources, deploy to cloud, atk provision, atk deploy | provision-deploy/provision-deploy.md |
| troubleshoot | Fix errors, 401, port conflicts, YAML errors, stale bots | troubleshoot/troubleshoot.md |
| slack-to-teams | Migrate Slack bot to Teams, cross-platform bridging, Block Kit to Adaptive Cards | slack-to-teams/SKILL.md |
MANDATORY: Before executing any workflow, read the corresponding sub-skill document.
Shared References
manifest-and-yaml.md — Project files, YAML config, env vars, .localConfigs flow
commands.md — ATK CLI commands: package, validate, share, collaborate
templates.md — Complete template catalog with language support
experts/ — 100+ micro-expert files: Teams SDK, Slack SDK, cross-platform bridging, deploy, AI models, security, language conversion
docs/ — Platform comparison guides: UI, messaging, identity, infrastructure, feature gaps
Workflow Chains
Match user intent to the smallest valid workflow.
| User Intent | Workflow (read in order) |
|---|---|
| Build new app from scratch | create-project → test-playground |
| Test existing project locally | test-playground (recommended) or test-teams |
| Deploy to Azure | provision-deploy |
| Fix broken bot | troubleshoot → re-test |
| Migrate Slack bot to Teams | slack-to-teams |
MANDATORY: Before executing any slack-to-teams workflow, read slack-to-teams/SKILL.md first. The sub-skill contains a routed expert system with 100+ micro-expert files for cross-platform bot development.
ATK Project Context Resolution
Resolve config values only when missing. If a value is already known in the session, reuse it.
Step 1: Detect ATK Project
If m365agentstoolkit*.yml exists in the current folder, treat it as an ATK project and parse configuration.
Step 2: Resolve Common Configuration
Resolve variables referenced in m365agentstoolkit*.yml. Common variables:
AZURE_OPENAI_API_KEY
AZURE_OPENAI_ENDPOINT
AZURE_OPENAI_DEPLOYMENT_NAME
Step 3: Collect Missing Values
If required values are missing, ask the user for only the missing ones.
Refer to manifest-and-yaml.md for full config-file details.
Files
- ATTRIBUTION.mdAdded by AutoGineer906 B
- LICENSELicence file added by AutoGineer1.1 KiB
- SKILL.md7.6 KiB
- create-project/create-project.md8.1 KiB
- docs/README.md2.8 KiB
- docs/advanced-features.md7.0 KiB
- docs/feature-gaps.md46.3 KiB
- docs/files-and-links.md4.2 KiB
- docs/identity-and-auth.md4.3 KiB
- docs/infrastructure.md6.7 KiB
- docs/interactive-responses.md4.4 KiB
- docs/messaging-and-commands.md4.5 KiB
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- experts/bridge/transport-socketmode-https-ts.md14.3 KiB
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- experts/bridge/ui-block-kit-adaptive-cards-ts.md21.5 KiB
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- experts/bridge/workflow.composable-platform-ts.md13.7 KiB
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- experts/builder.md11.1 KiB
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- experts/slack/bolt-python.md9.5 KiB
- experts/slack/cli.app-management.md7.9 KiB
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- experts/slack/runtime.socket-mode-ts.md9.5 KiB
- experts/slack/ui.block-kit-ts.md11.5 KiB
- experts/slack/ui.modals-lifecycle-ts.md13.3 KiB
- experts/slack/web-api-proactive-ts.md11.0 KiB
- experts/slack/workflow.slack-automations-ts.md10.2 KiB
- experts/teams/a2a.client-basics-ts.md9.7 KiB
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- experts/teams/ai.chatprompt-basics-ts.md8.1 KiB
- experts/teams/ai.citations-feedback-ts.md6.9 KiB
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- experts/teams/ai.memory-localmemory-ts.md7.3 KiB
- experts/teams/ai.model-setup-ts.md6.6 KiB
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- experts/teams/ai.streaming-ts.md6.9 KiB
- experts/teams/auth.oauth-sso-ts.md10.1 KiB
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- experts/teams/project.scaffold-files-ts.md12.2 KiB
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- experts/teams/runtime.manifest-ts.md12.3 KiB
- experts/teams/runtime.proactive-messaging-ts.md12.6 KiB
- experts/teams/runtime.routing-handlers-ts.md12.3 KiB
- experts/teams/state.storage-patterns-ts.md9.4 KiB
- experts/teams/teams-dotnet.md8.2 KiB
- experts/teams/teams-python.md8.3 KiB
- experts/teams/ui.adaptive-cards-ts.md12.9 KiB
- experts/teams/ui.dialogs-task-modules-ts.md15.1 KiB
- experts/teams/ui.message-extensions-ts.md15.6 KiB
- experts/teams/workflow.approvals-inline-ts.md12.4 KiB
- experts/teams/workflow.message-native-records-ts.md10.6 KiB
- experts/teams/workflow.sharepoint-lists-ts.md9.0 KiB
- experts/teams/workflow.state-driven-events-ts.md12.2 KiB
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- experts/update-experts.md10.0 KiB
- provision-deploy/provision-deploy.md4.3 KiB
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- test-playground/test-playground.md1.1 KiB
- test-teams/test-teams.md4.9 KiB
- toolkit/README.md4.2 KiB
- toolkit/commands.md2.6 KiB
- toolkit/environments.md12.6 KiB
- toolkit/lifecycle-cli.md17.6 KiB
- toolkit/manifest-and-yaml.md6.0 KiB
- toolkit/playground.md7.6 KiB
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- troubleshoot/troubleshoot.md20.2 KiB
experts/slack/index.md
slack-router
purpose
Route Slack app tasks to the minimal set of micro-expert files. Read only the clusters that match the user's request.
task clusters
Bolt Foundations
When: setting up a Slack Bolt app, App() constructor, listeners, middleware, event subscriptions
Read:
runtime.bolt-foundations-ts.mdruntime.ack-rules-ts.md(ack rules are integral to every Bolt handler)
Ack Rules
When: ack() patterns, response timing, acknowledgement requirements, 3-second rule
Read:
runtime.ack-rules-ts.mdDepends on:runtime.bolt-foundations-ts.md(ack applies within Bolt handler types)
Slash Commands
When: slash commands, /command, command registration, command response
Read:
runtime.slash-commands-ts.mdruntime.ack-rules-ts.md(commands require ack within 3 seconds)ui.block-kit-ts.md(only if command opens a modal or sends Block Kit message)
Block Kit UI
When: Block Kit, blocks, surfaces, modals, home tab, interactive components Read:
ui.block-kit-ts.mdruntime.ack-rules-ts.md(interactive elements require ack in action/view handlers) Depends on:runtime.bolt-foundations-ts.md(action/view handlers registered on the App)
Events API
When: app.event(), event subscriptions, event types, app_mention, reaction_added, team_join, app_home_opened, member_joined_channel, retry handling, context.retryNum, ignoreSelf, directMention
Read:
bolt-events-ts.mdruntime.bolt-foundations-ts.md(handler registration context)
Assistant Container
When: Slack Assistant, assistant panel, threadStarted, userMessage, threadContextChanged, setStatus, setSuggestedPrompts, setTitle, getThreadContext, AssistantThreadContextStore, app.assistant()
Read:
bolt-assistant-ts.mdruntime.bolt-foundations-ts.md(App setup for assistant registration)
OAuth & Distribution
When: OAuth, multi-workspace, InstallProvider, InstallationStore, authorize, clientId, clientSecret, token storage, app distribution, stateSecret, Enterprise Grid, tokens_revoked, app_uninstalled
Read:
bolt-oauth-distribution-ts.mdruntime.bolt-foundations-ts.md(App constructor OAuth options)
Socket Mode
When: Socket Mode, socketMode, appToken, xapp-, WebSocket, local development, no public URL, SocketModeReceiver, @slack/socket-mode, connection lifecycle, reconnect, connections:write
Read:
runtime.socket-mode-ts.mdruntime.bolt-foundations-ts.md(App constructor setup) Depends on:runtime.bolt-foundations-ts.md(App constructor options)
Web API & Proactive Messaging
When: client.chat.postMessage, chat.update, chat.delete, proactive messages, chat.postEphemeral, ephemeral, scheduled messages, chat.scheduleMessage, users.info, users.lookupByEmail, conversations.list, conversations.history, filesUploadV2, file upload, say vs respond vs client, pagination, cursor, rate limits
Read:
web-api-proactive-ts.mdruntime.bolt-foundations-ts.md(App setup and client initialization) Depends on:runtime.bolt-foundations-ts.md(client property and token management)
Shortcuts
When: shortcuts, global shortcut, message shortcut, app.shortcut(), message_action, compose menu, message context menu, callback_id, shortcut payload
Read:
runtime.shortcuts-ts.mdruntime.ack-rules-ts.md(shortcuts require ack within 3 seconds)ui.modals-lifecycle-ts.md(shortcuts typically open modals via trigger_id) Depends on:runtime.bolt-foundations-ts.md(handler registration context)
Modal Lifecycle
When: modals, views.open, views.update, views.push, view_submission, view_closed, app.view(), response_action, private_metadata, multi-step modal, modal validation, modal stack, notify_on_close, trigger_id
Read:
ui.modals-lifecycle-ts.mdruntime.ack-rules-ts.md(view submission ack patterns)ui.block-kit-ts.md(block layout for modal content) Depends on:runtime.bolt-foundations-ts.md(App setup for view handler registration)
Bolt for Python
When: Python, slack_bolt, AsyncApp, Flask adapter, FastAPI adapter, Django adapter, SocketModeHandler, Python Slack SDK, @app.message, @app.command, @app.action, @app.event, @app.view, @app.shortcut, client.chat_postMessage, client.views_open, argument injection, decorator listeners
Read:
bolt-python.mdNote: All TS experts provide architectural patterns. This expert provides Python API mappings. Load the relevant TS expert for concepts, then this expert for Python translation.
Bolt for Java
When: Java, slack-bolt-java, com.slack.api.bolt, Spring Boot, SlackAppServlet, AppConfig.builder(), MethodsClient, ctx.client(), ctx.ack(), ctx.say(), request configurator lambdas, app.command, app.event, app.blockAction, app.viewSubmission, app.globalShortcut, SocketModeApp
Read:
bolt-java.mdNote: Java has SDK support for Slack only (Tier 3). For the Teams side, route to../bridge/rest-only-integration-ts.md.
CLI: Getting Started
When: Slack CLI, slack command, install CLI, slack auth login, slack auth list, slack create, slack project create, slack project init, slack project samples, slack doctor, .slack/ config, project.json, cli-config.json, hooks, slack upgrade, slack version, CLI setup
Read:
cli.getting-started.md
CLI: Local Dev & Deploy
When: slack run, slack deploy, slack activity, local development, deploy to Slack, hosted platform, dev server, activity logs, hot reload, file watching, Socket Mode dev, --cleanup, --activity-level, hooks system
Read:
cli.local-dev-deploy.mdcli.getting-started.md(only if project not yet set up) Depends on:cli.getting-started.md(project must exist before run/deploy)
CLI: Manifest & Triggers
When: slack manifest, slack manifest validate, slack manifest info, manifest.ts, slack.json, slack trigger, trigger create, trigger list, trigger update, trigger delete, trigger access, trigger types, shortcut trigger, event trigger, scheduled trigger, webhook trigger, slack function, function distribute, workflow trigger, trigger definition file
Read:
cli.manifest-triggers.mdDepends on:cli.getting-started.md(project must exist before manifest/trigger ops)
CLI: Datastore & Environment
When: slack datastore, datastore put, datastore get, datastore delete, datastore query, datastore count, bulk-put, bulk-get, bulk-delete, datastore update, slack env, slack env add, environment variable, slack external-auth, external OAuth provider, DefineDatastore
Read:
cli.datastore-env.mdcli.manifest-triggers.md(datastores must be declared in manifest) Depends on:cli.local-dev-deploy.md(app must be deployed before datastore/env ops)
Slack Automations Platform
When: Slack next-gen platform, DefineFunction, DefineWorkflow, DefineDatastore, Slack triggers, Slack hosted functions, Deno, Workflow Builder, custom functions, slack automation, competitive analysis Read:
workflow.slack-automations-ts.mdcli.manifest-triggers.md(trigger definitions)cli.datastore-env.md(datastore operations)
CLI: App Management
When: slack app install, slack app uninstall, slack app delete, slack app link, slack app unlink, slack app list, slack app settings, slack collaborator, collaborator add, collaborator remove, collaborator list, multi-workspace, workspace management
Read:
cli.app-management.mdDepends on:cli.local-dev-deploy.md(app must be deployed before install/collaborator ops)
cross-platform bridging
If the developer wants to add Teams support to an existing Slack app, route to ../bridge/index.md for cross-platform bridging experts. The bridge domain covers Slack↔Teams feature mapping, UI conversion, identity bridging, and infrastructure migration.
combining rule
If a request spans multiple clusters (e.g., "add a slash command that opens a Block Kit modal"), read files from every matching cluster. Avoid duplicates.
file inventory
bolt-assistant-ts.md | bolt-events-ts.md | bolt-java.md | bolt-oauth-distribution-ts.md | bolt-python.md | cli.app-management.md | cli.datastore-env.md | cli.getting-started.md | cli.local-dev-deploy.md | cli.manifest-triggers.md | runtime.ack-rules-ts.md | runtime.bolt-foundations-ts.md | runtime.shortcuts-ts.md | runtime.slash-commands-ts.md | runtime.socket-mode-ts.md | ui.block-kit-ts.md | ui.modals-lifecycle-ts.md | web-api-proactive-ts.md | workflow.slack-automations-ts.md
<!-- Updated 2026-02-27: Added bolt-assistant-ts (Assistant container), bolt-events-ts (Events API), bolt-oauth-distribution-ts (OAuth/multi-workspace) experts based on @slack/bolt v4.6.0 source -->
<!-- Updated 2026-03-05: Added workflow.slack-automations-ts for Slack next-gen platform (functions, workflows, triggers, datastores) -->
<!-- Updated 2026-03-01: Added 5 Slack CLI experts (getting-started, local-dev-deploy, manifest-triggers, datastore-env, app-management) based on slack-cli Go source -->
Requirements and compatibility
Works with: Claude Code, Claude apps, OpenAI Codex, GitHub Copilot, Cursor, Gemini CLI, Kiro, OpenCode, Goose, Amp, Roo Code, JetBrains Junie, Factory Droid, Devin (ex-Windsurf), Mistral Vibe, OpenHands, Letta
“Works with” means the tool reads the open Agent Skills format; a skill written for one tool may use features others lack.
Needs: Needs an API key, Needs Python, Needs Node.js
Security
What our scanner noticed· Medium risk
- Possible data-exfiltration endpoints
- Instructions that use the network
- Downloads piped into a shell
A static scan is not a guarantee. Skills are third-party content: review a skill before you let an agent use it.
Attribution and licence
- Published by
- Microsoft
- Publisher
- Microsoft (Official)
- Source
- microsoft/skills · .github/plugins/microsoft-365-agents-toolkit/skills/teams-app-developer · commit 0696600
- Licence
- MIT License (redistribution allowed)
- LICENSE (added by AutoGineer from LICENSE)
- ATTRIBUTION.md (written by AutoGineer)
- Synced
AutoGineer is not affiliated with or endorsed by Microsoft.
Download ZIP
The ZIP holds the skill’s files, its licence files and an ATTRIBUTION.md. Download teams-app-developer.zip