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 thangchung/agent-engineering-experiment --skill entra-app-registrationgit clone --depth 1 https://github.com/thangchung/agent-engineering-experimentWrote 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/thangchung/agent-engineering-experiment/entra-app-registration)<a href="https://agentmods.dev/skills/thangchung/agent-engineering-experiment/entra-app-registration"><img src="https://agentmods.dev/badge/skills/thangchung/agent-engineering-experiment/entra-app-registration/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/thangchung/agent-engineering-experiment/entra-app-registration"><img src="https://agentmods.dev/badge/skills/thangchung/agent-engineering-experiment/entra-app-registration.svg" alt="Reviewed on agentmods" width="80" 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 | $0.00093 | $0.01800 |
| Opus 5.5 | $0.00037 | $0.00720 |
| Sonnet 5.5 | $0.00019 | $0.00360 |
| Haiku 4.5 | $0.00009 | $0.00180 |
Grade A, and why
entra-app-registration 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 2mo 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.
This is a copy
97% identical to entra-app-registration — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 192 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Overview
Microsoft Entra ID (formerly Azure Active Directory) is Microsoft's cloud-based identity and access management service. App registrations allow applications to authenticate users and access Azure resources securely.
Key Concepts
| Concept | Description |
|---|---|
| App Registration | Configuration that allows an app to use Microsoft identity platform |
| Application (Client) ID | Unique identifier for your application |
| Tenant ID | Unique identifier for your Azure AD tenant/directory |
| Client Secret | Password for the application (confidential clients only) |
| Redirect URI | URL where authentication responses are sent |
| API Permissions | Access scopes your app requests |
| Service Principal | Identity created in your tenant when you register an app |
Application Types
| Type | Use Case |
|---|---|
| Web Application | Server-side apps, APIs |
| Single Page App (SPA) | JavaScript/React/Angular apps |
| Mobile/Native App | Desktop, mobile apps |
| Daemon/Service | Background services, APIs |
Core Workflow
Step 1: Register the Application
Create an app registration in the Azure portal or using Azure CLI.
Portal Method:
- Navigate to Azure Portal → Microsoft Entra ID → App registrations
- Click "New registration"
- Provide name, supported account types, and redirect URI
- Click "Register"
CLI Method: See references/cli-commands.md IaC Method: See references/BICEP-EXAMPLE.bicep
It's highly recommended to use the IaC to manage Entra app registration if you already use IaC in your project, need a scalable solution for managing lots of app registrations or need fine-grained audit history of the configuration changes.
Step 2: Configure Authentication
Set up authentication settings based on your application type.
- Web Apps: Add redirect URIs, enable ID tokens if needed
- SPAs: Add redirect URIs, enable implicit grant flow if necessary
- Mobile/Desktop: Use
http://localhostor custom URI scheme - Services: No redirect URI needed for client credentials flow
What ships with it
17 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- references/api-permissions.md 10.0 KB
- references/auth-best-practices.md 6.1 KB
- references/BICEP-EXAMPLE.bicep 5.2 KB
- references/cli-commands.md 8.6 KB
- references/console-app-example.md 11 KB
- references/first-app-registration.md 7.2 KB
- references/oauth-flows.md 9.3 KB
- references/sdk/azure-identity-dotnet.md 940 B
- references/sdk/azure-identity-java.md 1.2 KB
- references/sdk/azure-identity-py.md 1.1 KB
- references/sdk/azure-identity-rust.md 805 B
- references/sdk/azure-identity-ts.md 1.1 KB
- references/sdk/azure-keyvault-py.md 1.1 KB
- references/sdk/azure-keyvault-secrets-ts.md 1.0 KB
- references/sdk/microsoft-azure-webjobs-extensions-authentication-events-dotnet.md 1.5 KB
- references/troubleshooting.md 7.4 KB
- version.json 55 B
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.
- 2mo ago First seen · 192 lines · 93 tokens per session scan A d61088b7f410
entra-app-registration is a skill published in the GitHub repository thangchung/agent-engineering-experiment (28 stars, last pushed 23d ago), licensed MIT. It adds 93 tokens to every session and 1,800 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 97% identical to entra-app-registration, differing in 2 lines, and is treated as a copy.
entra-app-registration compared with skills from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| entra-app-registrationthangchung/agent-engineering-experiment | Skill | 28 | 23d ago | MIT | A | 93 | Claude Code |
| phoenix-cli-developmentArize-ai/phoenix | Skill | 12k | today | none | A | 105 | Codex, Cursor |
| phoenix-graphqlArize-ai/phoenix | Skill | 12k | today | none | A | 102 | Cursor |
| phoenix-otel-developmentArize-ai/phoenix | Skill | 12k | today | none | A | 30 | Codex, Cursor |
| voicelive-realtimeJinLee794/agent-framework-skills | Skill | 2 | 3mo ago | MIT | A | 101 | Cursor |
| maf-voice-agentJinLee794/agent-framework-skills | Skill | 2 | 3mo ago | MIT | A | 54 | Cursor |
| mem0-oss-to-platformmem0ai/mem0 | Skill | 68k | 2d ago | Apache-2.0 | A | 217 | Claude Code, Codex |