supabase-sso-saml-architect

supabase-sso-saml-architect is an agent for Claude Code from luanpdd/kit-mcp. It costs 56 tokens per session (4,952 once invoked), scanned A, original, MIT.

A Supabase assistant for setting up enterprise SAML 2.0 single sign-on, where an organization’s identity provider such as Okta or Azure AD handles employee login. It also prepares tenant-scoped database access rules.

In plain words
What is it for?
It creates Supabase CLI commands, attribute-mapping JSON, restrictive row-level security policies, and guidance for multi-tenant login flows.
Why use it?
It reduces the risk of using the wrong user identifier, misconfiguring identity-provider mappings, or allowing one organization to access another’s data.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md).

Good fit It creates Supabase CLI commands, attribute-mapping JSON, restrictive row-level security policies, and guidance for multi-tenant login flows.

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Install with agentmods
npx agentmods add agents/luanpdd/kit-mcp/supabase-sso-saml-architect
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.

Clone the repo
git clone --depth 1 https://github.com/luanpdd/kit-mcp

Made for: Claude Code.

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 supabase-sso-saml-architect

README.md
[![agentmods](https://agentmods.dev/badge/agents/luanpdd/kit-mcp/supabase-sso-saml-architect/github.svg)](https://agentmods.dev/agents/luanpdd/kit-mcp/supabase-sso-saml-architect)
Your own site
<a href="https://agentmods.dev/agents/luanpdd/kit-mcp/supabase-sso-saml-architect"><img src="https://agentmods.dev/badge/agents/luanpdd/kit-mcp/supabase-sso-saml-architect/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 supabase-sso-saml-architect

Your own site · 80×15
<a href="https://agentmods.dev/agents/luanpdd/kit-mcp/supabase-sso-saml-architect"><img src="https://agentmods.dev/badge/agents/luanpdd/kit-mcp/supabase-sso-saml-architect.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 56 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 4,952 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 $0.00056 $0.04952
Opus 5 $0.00028 $0.02476
Sonnet 5 $0.00011 $0.00990
Haiku 4.5 $0.00006 $0.00495

Measured 6d ago against content hash 8f8071420c96, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

supabase-sso-saml-architect 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 6d 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.

kit/agents/supabase-sso-saml-architect.md · 551 lines

How it starts

The opening of the file, as written. The whole thing — 551 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Você é o canonical architect e materializer de Enterprise SSO SAML 2.0 em Supabase. Recebe spec (IdP — Okta/Azure AD/Google Workspace/etc, metadata URL ou arquivo XML, domínios, attribute mappings desejados, multi-tenant sim/não) via Task() upstream context + intent original, e produz: comandos supabase sso add/update prontos para execução, JSON de attribute mapping (keys com name/array/default/names), políticas RLS RESTRICTIVE para escopo de tenant usando auth.jwt()#>>'{amr,0,provider}' e padrão organization_settings.sso_provider_id, e — se multi-tenant — orientação de bookmark app para contornar a incompatibilidade IdP-initiated × PKCE. Verdicts GO/STRENGTHEN/REWRITE.

Compat: Full em todos os IDEs (filesystem-only). Veja COMPATIBILITY.md.

Princípio canônico: Agents não-Supabase pensam/planejam; você materializa/hardena. Ninguém descarta upstream — quando há conflito de patterns, você explica via diff e propõe alternativa, nunca reescreve silenciosamente.

Por que existe

SSO SAML 2.0 em Supabase tem 6 armadilhas críticas que afetam segurança e corretude:

  1. Usar email como chave de usuário → emails não são únicos com SSO (mesmo usuário, IdPs diferentes → emails duplicados); use UUID do Supabase
  2. Assumir auto-linking → Supabase não faz auto-link entre SSO e email/password por padrão — usuário duplicado se não gerenciado
  3. IdP-initiated com PKCE direto → SAML IdP-initiated não é compatível com PKCE flow nativo; workaround é bookmark app
  4. Faltar Supabase CLI v1.46.4+ → comandos supabase sso add não existem em versões anteriores
  5. Attribute mapping sem array: true para grupos → grupos do IdP são arrays; sem flag, apenas primeiro valor é capturado
  6. RLS sem as restrictive → tenant isolation pode ser bypassado por políticas PERMISSIVE

Este agent gera comandos CLI prontos (não usa MCP — filesystem-only) para máxima compatibilidade com todos os IDEs.

Inputs esperados (do caller via Task())

Read the full file on GitHub · 551 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. 6d ago First seen · 551 lines · 56 tokens per session scan A 8f8071420c96

Subscribe to this mod's changes

supabase-sso-saml-architect is an agent published in the GitHub repository luanpdd/kit-mcp (1 stars, last pushed 2d ago), licensed MIT. It adds 56 tokens to every session and 4,952 once invoked, about $0.0003 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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