agentmods.dev

flat-legacy

flat-legacy is a skill for Claude Code, Codex from lorem-dev/skillkeeper-test-repo. It costs 16 tokens per session (288 once invoked), scanned A, original, MIT.

A test skill that declares its dependencies using the older top-level `requires` field instead of the newer namespaced form. It checks how the installer handles legacy metadata.

In plain words
What is it for?
Testing backward-compatible dependency installation, lint warnings, and list-form dependency handling.
Why use it?
It confirms that older dependency declarations still work while producing a warning that recommends the newer format.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

not rated 2repo 2mo ago A scan 16 tokens original MIT

Good fit Testing backward-compatible dependency installation, lint warnings, and list-form dependency handling.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/lorem-dev/skillkeeper-test-repo/flat-legacy
View source ↗ lorem-dev/skillkeeper-test-repo
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 lorem-dev/skillkeeper-test-repo --skill flat-legacy
Clone the repo
git clone --depth 1 https://github.com/lorem-dev/skillkeeper-test-repo

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 flat-legacy

README.md
[![agentmods](https://agentmods.dev/badge/skills/lorem-dev/skillkeeper-test-repo/flat-legacy/github.svg)](https://agentmods.dev/skills/lorem-dev/skillkeeper-test-repo/flat-legacy)
Your own site
<a href="https://agentmods.dev/skills/lorem-dev/skillkeeper-test-repo/flat-legacy"><img src="https://agentmods.dev/badge/skills/lorem-dev/skillkeeper-test-repo/flat-legacy/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 flat-legacy

Your own site · 80×15
<a href="https://agentmods.dev/skills/lorem-dev/skillkeeper-test-repo/flat-legacy"><img src="https://agentmods.dev/badge/skills/lorem-dev/skillkeeper-test-repo/flat-legacy.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 16 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 288 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 $0.00016 $0.00288
Opus 5.5 $0.00006 $0.00115
Sonnet 5.5 $0.00003 $0.00058
Haiku 4.5 $0.00002 $0.00029

Measured 2mo ago against content hash 9691ffe28dd1, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

flat-legacy 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.

requires/flat-legacy/SKILL.md · 33 lines

What it actually says

flat-legacy

The flat spelling. requires: sits at the top level of the frontmatter, with no skillkeeper: block anywhere in the file.

What this fixture covers:

  • The flat field still resolves. The dependency is honoured exactly as if it had been written under skillkeeper.requires: installing this skill installs requires/chain-c too. Leniency here is deliberate - the flat field is what skills written before the namespaced block used.

  • repo lint code SK010, a warning, not an error:

    SK010 [requires/flat-legacy]: Skill "requires/flat-legacy" declares
dependencies with the flat "requires" field; prefer "skillkeeper.requires".

    A warning alone does not fail repo lint; the exit code stays 0 unless some other skill reports an error.

  • The list form, so no coercion note is produced. A bare requires: x would additionally be read as a one-element list and reported separately; keep this one a list so SK010 is the only finding attributed to this skill.

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 · 33 lines · 16 tokens per session scan A 9691ffe28dd1

Subscribe to this mod's changes

flat-legacy is a skill published in the GitHub repository lorem-dev/skillkeeper-test-repo (2 stars, last pushed 2mo ago), licensed MIT. It adds 16 tokens to every session and 288 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 2026-08-31.

Testingaiai-skillsmcp
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