PrompterOne: Skill for Codex

.codex/skills/dotnet-managedcode-storage/SKILL.md

dotnet-managedcode-storage is a skill for Codex from managedcode/PrompterOne. It costs 45 tokens per session (393 once invoked), scanned A, original, MIT.

Guidance for using ManagedCode.Storage as one interface for file or object storage in a .NET application. It keeps differences between storage providers behind that library.

In plain words
What is it for?
Use it to design or review upload, download, existence-check, and deletion flows, choose storage containers, and connect the application to different storage backends.
Why use it?
It avoids scattering provider-specific storage code throughout the application and centralizes configuration such as credentials and container names.

Skill for Codex

Written for Codex: installed under .codex/.

This is managedcode/PrompterOne's own configuration. It tells Codex how to work on PrompterOne 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 PrompterOne configures →

Reuse

Borrowing it

Nothing to install: this file belongs to managedcode/PrompterOne. 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/managedcode/PrompterOne/main/.codex/skills/dotnet-managedcode-storage/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/managedcode/PrompterOne

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.

agentmods badge for dotnet-managedcode-storage

README.md
[![agentmods](https://agentmods.dev/badge/skills/managedcode/prompterone/dotnet-managedcode-storage/github.svg)](https://agentmods.dev/skills/managedcode/prompterone/dotnet-managedcode-storage)
Your own site
<a href="https://agentmods.dev/skills/managedcode/prompterone/dotnet-managedcode-storage"><img src="https://agentmods.dev/badge/skills/managedcode/prompterone/dotnet-managedcode-storage/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 dotnet-managedcode-storage

Your own site · 80×15
<a href="https://agentmods.dev/skills/managedcode/prompterone/dotnet-managedcode-storage"><img src="https://agentmods.dev/badge/skills/managedcode/prompterone/dotnet-managedcode-storage.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 393 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 $0.00045 $0.00393
Opus 5.5 $0.00018 $0.00157
Sonnet 5.5 $0.00009 $0.00079
Haiku 4.5 $0.00005 $0.00039

Measured 1mo ago against content hash 419ed9d5d33c, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

dotnet-managedcode-storage 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

.codex/skills/dotnet-managedcode-storage/SKILL.md · 45 lines

What it actually says

ManagedCode.Storage

Trigger On

  • integrating ManagedCode.Storage into a .NET application
  • reviewing how a project abstracts file or object storage
  • deciding whether to centralize storage provider differences behind one library
  • documenting upload, download, container, or blob-handling flows with ManagedCode.Storage

Workflow

  1. Identify the actual storage use case:
    • blob or file storage
    • provider abstraction across environments
    • app-service integration and configuration
  2. Verify whether the project wants one storage contract instead of provider-specific SDK calls scattered across the codebase.
  3. Keep application code dependent on the library abstraction, not directly on backend-specific storage SDKs unless a provider-only feature is truly required.
  4. Centralize provider configuration, credentials, and container naming in composition-root code and typed settings.
  5. Validate the real upload, download, existence-check, and deletion flows after wiring the library.
flowchart LR
  A["Application service"] --> B["ManagedCode.Storage abstraction"]
  B --> C["Provider-specific storage implementation"]
  C --> D["Blob or object storage backend"]

Deliver

  • concrete guidance on when ManagedCode.Storage is the right abstraction
  • wiring guidance that keeps provider concerns out of business code
  • verification steps for the storage flows the application actually uses

Validate

  • the project really benefits from a storage abstraction and is not hiding provider-specific behavior it still needs
  • storage configuration is centralized and explicit
  • code reviews check real read and write paths, not only registration snippets
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. 1mo ago First seen · 45 lines · 45 tokens per session scan A 419ed9d5d33c

Subscribe to this mod's changes

dotnet-managedcode-storage is a skill published in the GitHub repository managedcode/PrompterOne (45 stars, last pushed 5mo ago), licensed MIT. It adds 45 tokens to every session and 393 once invoked, about $0.0002 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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