A guide to Prowler-specific Django API work, including tenant isolation, user roles, cloud providers, and background tasks. Tenant isolation keeps one customer's data separate from another customer's data.

It helps developers safely change Prowler API models, serializers, views, filters, provider operations, permissions, and Celery background tasks.

It helps prevent security bugs such as background tasks reading the wrong customer's data or bypassing access rules. It explains the required database and permission patterns for Prowler's multi-tenant system.

prowler-api — Skill by prowler-cloud

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/prowler-cloud/prowler/prowler-api

Any agent

npx skills add prowler-cloud/prowler --skill prowler-api

Clone the repo

git clone --depth 1 https://github.com/prowler-cloud/prowler

Made for: Claude Code, Codex.

Per session 53 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 4,324 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. 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	$0.00053	$0.04324
Opus 5	$0.00026	$0.02162
Sonnet 5	$0.00011	$0.00865
Haiku 4.5	$0.00005	$0.00432

Measured yesterday against content hash 133438f95e30, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

prowler-api 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 yesterday.

The scan reads SKILL.md. This mod also ships 2 executable files (assets/celery_patterns.py, assets/security_patterns.py), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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/prowler-api/SKILL.md · 506 lines

How it starts

The opening of the file, as written. The whole thing — 506 lines — stays where its author put it; the contents beside it link to each section on GitHub.

When to Use

Use this skill for Prowler-specific patterns:

Row-Level Security (RLS) / tenant isolation
RBAC permissions and role checks
Provider lifecycle and validation
Celery tasks with tenant context
Multi-database architecture (4-database setup)

For generic DRF patterns (ViewSets, Serializers, Filters, JSON:API), use django-drf skill.

Critical Rules

ALWAYS use rls_transaction(tenant_id) when querying outside ViewSet context
ALWAYS use get_role() before checking permissions (returns FIRST role only)
ALWAYS use @set_tenant then @handle_provider_deletion decorator order
ALWAYS use explicit through models for M2M relationships (required for RLS)
NEVER access Provider.objects without RLS context in Celery tasks
NEVER bypass RLS by using raw SQL or connection.cursor()
NEVER use Django's default M2M - RLS requires through models with tenant_id

Note: rls_transaction() accepts both UUID objects and strings - it converts internally via str(value).

Architecture Overview

4-Database Architecture

Database	Alias	Purpose	RLS
`default`	`prowler_user`	Standard API queries	Yes
`admin`	`admin`	Migrations, auth bypass	No
`replica`	`prowler_user`	Read-only queries	Yes
`admin_replica`	`admin`	Admin read replica	No

# When to use admin (bypasses RLS)
from api.db_router import MainRouter
User.objects.using(MainRouter.admin_db).get(id=user_id)  # Auth lookups

# Standard queries use default (RLS enforced)
Provider.objects.filter(connected=True)  # Requires rls_transaction context

RLS Transaction Flow

Request → Authentication → BaseRLSViewSet.initial()
                                    │
                                    ├─ Extract tenant_id from JWT
                                    ├─ SET api.tenant_id = 'uuid' (PostgreSQL)
                                    └─ All queries now tenant-scoped

Read the full file on GitHub · 506 lines

Files

What ships with it

6 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.

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.

yesterday First seen · 506 lines · 53 tokens per session scan A 133438f95e30

Subscribe to this mod's changes

prowler-api is a skill published in the GitHub repository prowler-cloud/prowler (14,718 stars, last pushed 3d ago), licensed Apache-2.0. It adds 53 tokens to every session and 4,324 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 2026-08-30.

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