twelve-factor-audit

twelve-factor-audit is an agent for Claude Code from bdfinst/agentic-dev-team. It costs 23 tokens per session (570 once invoked), scanned A, original, MIT.

An audit of the twelve-factor method for building deployable services and APIs. It checks areas such as dependencies, environment configuration, backing services, logging, and deployment behaviour.

In plain words
What is it for?
Use it on a server project with a Dockerfile, server entry point, or cloud configuration to review its production setup.
Why use it?
It exposes hardcoded settings, undeclared dependencies, and operational patterns that can make a service difficult to deploy or maintain.

Agent for Claude Code

Written for Claude Code: effort in frontmatter.

Part of the dev-team plugin — 98 skills, 54 agents, 4 hooks shipped together

Good fit Use it on a server project with a Dockerfile, server entry point, or cloud configuration to review its production setup.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/bdfinst/agentic-dev-team/twelve-factor-audit
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/bdfinst/agentic-dev-team

Made for: Claude Code.

Or install dev-team, the plugin that ships this one along with the rest of its 98 skills, 54 agents, 4 hooks.

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 twelve-factor-audit

README.md
[![agentmods](https://agentmods.dev/badge/agents/bdfinst/agentic-dev-team/twelve-factor-audit/github.svg)](https://agentmods.dev/agents/bdfinst/agentic-dev-team/twelve-factor-audit)
Your own site
<a href="https://agentmods.dev/agents/bdfinst/agentic-dev-team/twelve-factor-audit"><img src="https://agentmods.dev/badge/agents/bdfinst/agentic-dev-team/twelve-factor-audit/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 twelve-factor-audit

Your own site · 80×15
<a href="https://agentmods.dev/agents/bdfinst/agentic-dev-team/twelve-factor-audit"><img src="https://agentmods.dev/badge/agents/bdfinst/agentic-dev-team/twelve-factor-audit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 23 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 570 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 $0.00023 $0.00570
Opus 5.5 $0.00009 $0.00228
Sonnet 5.5 $0.00005 $0.00114
Haiku 4.5 $0.00002 $0.00057

Measured 1mo ago against content hash 6ff2f15e54c5, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

twelve-factor-audit 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 1mo 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.

plugins/dev-team/templates/agents/twelve-factor-audit.md · 50 lines

How it starts

The opening of the file, as written. The whole thing — 50 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Twelve-Factor Audit

Output JSON:

{"status": "pass|warn|fail|skip", "issues": [{"severity": "error|warning|suggestion", "confidence": "high|medium|none", "file": "", "line": 0, "message": "", "suggestedFix": ""}], "summary": ""}

Status: pass=12-factor compliant, warn=violations detected, fail=critical anti-patterns Severity: error=security or reliability risk, warning=operational concern, suggestion=best practice Confidence: high=mechanical (hardcoded config, missing health check); medium=design judgment; none=infrastructure context needed

Context needs: project-structure

Activates when

Service/API project detected: has Dockerfile, server entry point, or cloud config (Kubernetes manifests, cloud formation, etc.).

Skip

Return skip when project is a library, CLI tool, or static site without a server component.

Detect

Factor What to check
I. Codebase Single repo per service? Multiple deploys from one codebase?
II. Dependencies All deps declared (lockfile committed)? No system-level assumptions?
III. Config Config in env vars? No hardcoded URLs, credentials, or feature flags in code?
IV. Backing services Database, cache, queue treated as attached resources? Connection strings via env?
V. Build, release, run Strict separation? Build produces artifact, release combines with config, run executes?
VI. Processes Stateless processes? No sticky sessions? No local filesystem for shared state?
VII. Port binding Self-contained via port binding? Not relying on runtime injection into a webserver?
VIII. Concurrency Scale out via process model? No in-memory state that prevents horizontal scaling?
IX. Disposability Fast startup? Graceful shutdown? SIGTERM handling?
X. Dev/prod parity Same backing services in dev/prod? No "works on my machine" patterns?
XI. Logs Treat logs as event streams? Write to stdout, not files? No log file rotation in app?
XII. Admin processes One-off tasks as scripts? Database migrations as code? Not manual SQL?

Read the full file on GitHub · 50 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. 1mo ago First seen · 50 lines · 23 tokens per session scan A 6ff2f15e54c5

Subscribe to this mod's changes

twelve-factor-audit is an agent published in the GitHub repository bdfinst/agentic-dev-team (295 stars, last pushed 4d ago), licensed MIT. It adds 23 tokens to every session and 570 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-09-05.

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