zero-trust-identity

zero-trust-identity is a skill for Claude Code, Codex from j4flmao/agent-skills. It costs 20 tokens per session (1,080 once invoked), scanned A, original, MIT.

A guide to identity and login security using Zero Trust, OpenID Connect, OAuth 2.0, SAML, and JSON Web Tokens. Zero Trust means checking each access request explicitly instead of trusting a network location.

In plain words
What is it for?
It is for designing login flows, validating JWTs, configuring OIDC authorization-code and PKCE flows, and connecting applications to identity providers through OIDC or SAML.
Why use it?
It helps prevent authentication and authorization mistakes, including unsafe token handling and weak protection against request forgery.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit It is for designing login flows, validating JWTs, configuring OIDC authorization-code and PKCE flows, and connecting applications to identity providers through OIDC or SAML.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/j4flmao/agent-skills/zero-trust-identity
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 j4flmao/agent-skills --skill zero-trust-identity
Clone the repo
git clone --depth 1 https://github.com/j4flmao/agent-skills

Made for: Claude Code, Codex.

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 zero-trust-identity

README.md
[![agentmods](https://agentmods.dev/badge/skills/j4flmao/agent-skills/zero-trust-identity/github.svg)](https://agentmods.dev/skills/j4flmao/agent-skills/zero-trust-identity)
Your own site
<a href="https://agentmods.dev/skills/j4flmao/agent-skills/zero-trust-identity"><img src="https://agentmods.dev/badge/skills/j4flmao/agent-skills/zero-trust-identity/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.

agentmods 80×15 button for zero-trust-identity

Your own site · 80×15
<a href="https://agentmods.dev/skills/j4flmao/agent-skills/zero-trust-identity"><img src="https://agentmods.dev/badge/skills/j4flmao/agent-skills/zero-trust-identity.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 20 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,080 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 2 findings, up to high

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • high Privilege Escalation · line 17
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
  • high Privilege Escalation · line 51
    Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.
    Fix: Remove references to credential paths. Use environment variables or secrets managers. For docs, use placeholder paths (e.g., /path/to/config). Never load .env or token files in production code paths.
How audits are shown
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 $0.00020 $0.01080
Opus 5 $0.00010 $0.00540
Sonnet 5 $0.00004 $0.00216
Haiku 4.5 $0.00002 $0.00108

Measured 8d ago against content hash b4121fc542b4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

zero-trust-identity 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 8d 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/cybersecurity/zero-trust-identity/SKILL.md · 62 lines

How it starts

The opening of the file, as written. The whole thing — 62 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Zero Trust Identity Architecture and Authentication Flows

Zero Trust assumes hostility at all network boundaries, mandating explicit verification of identity and device context for every access request. This reference details the underlying mechanisms of primary identity federations and token validations.

OIDC (OpenID Connect) and OAuth2 Flows

OIDC is an identity layer built on top of the OAuth 2.0 protocol. The Authorization Code Flow (often with PKCE) is the gold standard for secure authentication.

  1. Authorization Request: The client redirects the user-agent to the authorization server (/authorize) with response_type=code, a client_id, redirect_uri, scope=openid, and state/nonce/code_challenge.
  2. Authentication & Consent: The user authenticates. The server validates the credentials and requests consent if necessary.
  3. Authorization Response: The server redirects the user-agent back to the redirect_uri with an authorization code and the state parameter for CSRF mitigation.
  4. Token Request: The client authenticates to the token endpoint (/token), exchanging the code and code_verifier (PKCE) for an ID Token (JWT) and an Access Token.

JWT Signature Validation (RS256 vs HS256)

JWTs (JSON Web Tokens) encapsulate claims in a compact, URL-safe format. Validation of the signature is paramount to prevent token forgery.

  • HS256 (HMAC with SHA-256): Symmetric signing. The Identity Provider (IdP) and the Resource Server (RS) share the same secret key. Risk: If the RS is compromised, the shared secret is exposed, allowing the attacker to forge JWTs. Suitable only for internal, tightly-coupled microservices.
  • RS256 (RSA Signature with SHA-256): Asymmetric signing. The IdP signs the JWT with its private key. The RS validates the signature using the IdP's public key (retrieved via JWKS - JSON Web Key Set). Benefit: The RS only holds the public key; compromise does not lead to token forgery capabilities.

Read the full file on GitHub · 62 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. 8d ago First seen · 62 lines · 20 tokens per session scan A b4121fc542b4

Subscribe to this mod's changes

zero-trust-identity is a skill published in the GitHub repository j4flmao/agent-skills (23 stars, last pushed 5d ago), licensed MIT. It adds 20 tokens to every session and 1,080 once invoked, about $0.0001 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 2026-09-03.

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