fly-security-and-secrets

fly-security-and-secrets is a skill for Claude Code from jsgerman-oss/blackrim-nimbus-skills. It costs 79 tokens per session (2,221 once invoked), scanned A, original, MIT.

A guide for securing applications hosted on Fly.io, a platform for running apps on servers. It covers access tokens, stored secrets, private networking, organization access, and hardened images.

In plain words
What is it for?
Use it when setting up deployment credentials, adding or rotating application secrets, restricting an app to Fly.io's private network, reviewing team access, or enforcing single sign-on.
Why use it?
It helps prevent overly broad credentials, exposed applications, leaked secrets, and lingering access for former team members. It also supports reviewing whether apps are public or private.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the cloud-fly plugin — 5 skills, 1 command, 2 agents shipped together

Good fit Use it when setting up deployment credentials, adding or rotating application secrets, restricting an app to Fly.io's private network, reviewing team access, or enforcing single sign-on.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/jsgerman-oss/blackrim-nimbus-skills/fly-security-and-secrets
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 jsgerman-oss/blackrim-nimbus-skills --skill fly-security-and-secrets
Clone the repo
git clone --depth 1 https://github.com/jsgerman-oss/blackrim-nimbus-skills

Made for: Claude Code.

Or install cloud-fly, the plugin that ships this one along with the rest of its 5 skills, 1 command, 2 agents.

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 fly-security-and-secrets

README.md
[![agentmods](https://agentmods.dev/badge/skills/jsgerman-oss/blackrim-nimbus-skills/fly-security-and-secrets/github.svg)](https://agentmods.dev/skills/jsgerman-oss/blackrim-nimbus-skills/fly-security-and-secrets)
Your own site
<a href="https://agentmods.dev/skills/jsgerman-oss/blackrim-nimbus-skills/fly-security-and-secrets"><img src="https://agentmods.dev/badge/skills/jsgerman-oss/blackrim-nimbus-skills/fly-security-and-secrets/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 fly-security-and-secrets

Your own site · 80×15
<a href="https://agentmods.dev/skills/jsgerman-oss/blackrim-nimbus-skills/fly-security-and-secrets"><img src="https://agentmods.dev/badge/skills/jsgerman-oss/blackrim-nimbus-skills/fly-security-and-secrets.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 79 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,221 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 $0.00079 $0.02221
Opus 5 $0.00039 $0.01111
Sonnet 5 $0.00016 $0.00444
Haiku 4.5 $0.00008 $0.00222

Measured 12d ago against content hash 14c87194d4c1, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

fly-security-and-secrets 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 12d 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.

cloud-fly/skills/fly-security-and-secrets/SKILL.md · 183 lines

How it starts

The opening of the file, as written. The whole thing — 183 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Fly Security and Secrets

When to use

  • Setting up token scopes for CI/CD pipelines.
  • Injecting application secrets and rotating them without downtime.
  • Hardening an app to be accessible only within the 6PN private network.
  • Reviewing org membership and access for departing team members.
  • Designing an SSO-enforced Fly organization.
  • Auditing which apps have public IPs vs private-only access.

Authentication — Fly tokens

Fly has two authentication surfaces: the user-facing fly auth OAuth flow and machine-to-machine tokens.

Token types

Type Scope Create with Typical use
Org token Full org access — all apps, all ops fly tokens create org Admin automation; avoid in CI
App token One app, read/write fly tokens create deploy -a <app> CI deployment for one app
Deploy token One app, deploy-only (no secret read) fly tokens create deploy -a <app> --expiry 24h Narrowest for GitHub Actions
Personal access token Your user scope Fly dashboard → "Access Tokens" Developer tooling, local scripts

Default for CI: use deploy tokens, not org tokens. A deploy token cannot read secrets, cannot delete apps, and cannot access other apps in the org. Scope to the minimum required action.

Token expiry: always set --expiry. Indefinite tokens are a compromise waiting to happen. For GitHub Actions, regenerate monthly or tie to repo-level rotation schedule.

fly auth and SSO

For human users, fly auth login completes an OAuth flow. For organizations with SSO requirements, Fly supports Google Workspace and GitHub OAuth — enforce via the org dashboard under "Authentication". SSO enforcement means no member can log in with email/password; all access goes through the IdP.

Departing team members: remove from the Fly org immediately (fly orgs members remove). Their personal tokens become invalid within minutes of removal. Audit membership quarterly (fly orgs members list).

Read the full file on GitHub · 183 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. 12d ago First seen · 183 lines · 79 tokens per session scan A 14c87194d4c1

Subscribe to this mod's changes

fly-security-and-secrets is a skill published in the GitHub repository jsgerman-oss/blackrim-nimbus-skills (8 stars, last pushed 26d ago), licensed MIT. It adds 79 tokens to every session and 2,221 once invoked, about $0.0004 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 2026-08-31.

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