FlyEnv: Skill for Codex

.codex/skills/flyenv-module-boundaries/SKILL.md

flyenv-module-boundaries is a skill for Codex from xpf0000/FlyEnv. It costs 37 tokens per session (806 once invoked), scanned A, original, BSD-3-Clause.

A set of design rules for adding or changing FlyEnv modules, especially those involving background work, downloads, installation, or external programs.

In plain words
What is it for?
Use it when changing renderer-to-service communication, module storage, service lifecycles, background operations, web panels, downloads, installations, or external-process handling.
Why use it?
It helps keep module state, settings, and start/stop behavior in the right place as the application grows. IPC means communication between separate parts of an application.

Skill for Codex

Written for Codex: agents/openai.yaml present. Also seen: mentions AGENTS.md.

This is xpf0000/FlyEnv's own configuration. It tells Codex how to work on FlyEnv itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything FlyEnv configures →

About the project

FlyEnv is a native desktop environment for running local development stacks on Windows, macOS, and Linux, including programming runtimes, databases, web servers, local sites, and developer tools. It is for developers who want to manage these services and project-specific runtime versions from one application.

xpf0000/FlyEnv · 3,340 stars · on GitHub · flyenv.com

Reuse

Borrowing it

Nothing to install: this file belongs to xpf0000/FlyEnv. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/xpf0000/FlyEnv/master/.codex/skills/flyenv-module-boundaries/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/xpf0000/FlyEnv

Made for: 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.

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README.md
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Your own site
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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.

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Your own site · 80×15
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Per session 37 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 806 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 pass 7 Sept 2026
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 $0.00037 $0.00806
Opus 5.5 $0.00015 $0.00322
Sonnet 5.5 $0.00007 $0.00161
Haiku 4.5 $0.00004 $0.00081

Measured 2mo ago against content hash eeb884d0ce7e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

flyenv-module-boundaries 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 2mo 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.

.codex/skills/flyenv-module-boundaries/SKILL.md · 51 lines

How it starts

The opening of the file, as written. The whole thing — 51 lines — stays where its author put it; the contents beside it link to each section on GitHub.

FlyEnv Module Boundaries

Treat state ownership as an architecture decision. Assign an owner by lifetime, never by the button or page that first triggers the work.

Default Module Constraints

These are prohibitions unless the user explicitly authorizes an exception for the specific new module:

  • Shared configuration: Never persist module-owned state in config.setup. Use StorageSetAsync/StorageGetAsync for module-owned persistence.
  • Pinia: Do not create a new Pinia store for module-owned state. Use a normal module-local class or singleton and bind it with reactiveBind.
  • Lifecycle duplication: Reuse ModuleInstalledItem.start(), stop(), and restart() whenever the public lifecycle supports the module. Supply module-specific values through startExtParam/stopExtParam, registered in the module (normally components/<Module>/aside.vue). Add a module-specific start/stop workflow only after proving the shared methods cannot express the required behavior.
  • Public leakage: Keep module-only properties, types, policies, helpers, and methods in the module directory. Do not add them to shared service types, ModuleInstalledItem, BrewStore, or generic lifecycle helpers.

Record any explicit exception and its scope in the implementation plan. Existing code is not authorization for copying an older pattern.

Required Workflow

  1. Read AGENTS.md, including Module Boundaries and Operation Ownership, before editing.
  2. Classify every new state as view, domain, renderer operation, or fork process state.
  3. Add an operation contract to the plan for every long-running renderer operation.
  4. Check the Default Module Constraints above and document any explicit exception.
  5. Implement only after the owner, terminal events, and tests are explicit.

State Owners

State Owner
Inputs, dialogs, selections, visual filters Mounted Vue component
Existing shared selected versions, installed lists, settings Pinia or an established module store
One asynchronous operation and its UI lifecycle Module-local singleton controller
Child process, PID, port, health, stop ordering Fork module/runtime

Read the full file on GitHub · 51 lines

Files

What ships with it

1 file 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.

  1. 2mo ago First seen · 51 lines · 37 tokens per session scan A eeb884d0ce7e

Subscribe to this mod's changes

flyenv-module-boundaries is a skill published in the GitHub repository xpf0000/FlyEnv (3,340 stars, last pushed yesterday), licensed BSD-3-Clause. It adds 37 tokens to every session and 806 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 2026-08-30.

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