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oma-backend

oma-backend is a skill for Claude Code, Codex from gracefullight/stock-checker. It costs 24 tokens per session (2,152 once invoked), scanned C, original, no licence file.

A backend development specialist for building APIs, databases, server logic, migrations, and authentication using separated code layers.

In plain words
What is it for?
Use it for creating or changing REST endpoints, database structures and migrations, server code, and login or access controls.
Why use it?
It helps organise server-side work and keeps API, database, and authentication code easier to maintain.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing. Also seen: installed under .agents/ (shared by several agents).

not rated 49repo changed 1mo ago C scan 24 tokens no licence

Good fit Use it for creating or changing REST endpoints, database structures and migrations, server code, and login or access controls.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/gracefullight/stock-checker/oma-backend
View source ↗ gracefullight/stock-checker
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 gracefullight/stock-checker --skill oma-backend
Clone the repo
git clone --depth 1 https://github.com/gracefullight/stock-checker

Made for: Claude Code, 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 oma-backend

README.md
[![agentmods](https://agentmods.dev/badge/skills/gracefullight/stock-checker/oma-backend/github.svg)](https://agentmods.dev/skills/gracefullight/stock-checker/oma-backend)
Your own site
<a href="https://agentmods.dev/skills/gracefullight/stock-checker/oma-backend"><img src="https://agentmods.dev/badge/skills/gracefullight/stock-checker/oma-backend/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 oma-backend

Your own site · 80×15
<a href="https://agentmods.dev/skills/gracefullight/stock-checker/oma-backend"><img src="https://agentmods.dev/badge/skills/gracefullight/stock-checker/oma-backend.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 24 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,152 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 $0.00024 $0.02152
Opus 5.5 $0.00010 $0.00861
Sonnet 5.5 $0.00005 $0.00430
Haiku 4.5 $0.00002 $0.00215

Measured 1mo ago against content hash 654a442b41e2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

oma-backend scanned grade C with 1 finding 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.

The scan reads SKILL.md. This mod also ships 2 executable files (stack/api-template.py, stack/api-template.ts), 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.

Hidden instructionshighPrompt injection

Directives inside HTML comments, invisible characters or bidirectional overrides are read by the model and not by the person reviewing the file.

<!-- oma-docs:ignore-start -->
.agents/skills/oma-backend/SKILL.md · 202 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

10 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.

  1. 1mo ago Changed · +2 lines 654a442b41e2
  2. 1mo ago Changed · -1 lines · -17 tokens per session scan A → C 4a9cb12718e0
  3. 2mo ago First seen · 201 lines · 41 tokens per session scan A be50cb3d2ac2

Subscribe to this mod's changes

oma-backend is a skill published in the GitHub repository gracefullight/stock-checker (49 stars, last pushed yesterday), with no licence file. It adds 24 tokens to every session and 2,152 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it C with 1 finding (hidden instructions). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Backend and APIsDatabases
Related

oma-backend compared with skills from other repositories

oma-backend next to 6 skills from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
oma-backendgracefullight/stock-checkerSkill49yesterdaynoneC24Claude Code, Codex
event-store-designwshobson/agentsSkill42kyesterdayMITA33Claude Code
platform-custom-field-generateforcedotcom/sf-skillsSkill1.1k2d agoApache-2.0A139Claude Code
field-service-sobject-create-configureforcedotcom/sf-skillsSkill1.1k2d agoApache-2.0A74Claude Code
durable-objectsfcakyon/claude-codex-settingsSkill1.2kyesterdayApache-2.0A22Claude Code
nornicdb-grpcorneryd/NornicDBSkill923yesterdayMITA98Claude Code, Codex
nw-ddd-eventsourcingnWave-ai/nWaveSkill631yesterdayMITA38Claude Code