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.
npx skills add mainline-org/mainline --skill mainline-layerfsgit clone --depth 1 https://github.com/mainline-org/mainlineWrote 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.
[](https://agentmods.dev/skills/mainline-org/mainline/mainline-layerfs)<a href="https://agentmods.dev/skills/mainline-org/mainline/mainline-layerfs"><img src="https://agentmods.dev/badge/skills/mainline-org/mainline/mainline-layerfs/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.
<a href="https://agentmods.dev/skills/mainline-org/mainline/mainline-layerfs"><img src="https://agentmods.dev/badge/skills/mainline-org/mainline/mainline-layerfs.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00021 | $0.00947 |
| Opus 5.5 | $0.00008 | $0.00379 |
| Sonnet 5.5 | $0.00004 | $0.00189 |
| Haiku 4.5 | $0.00002 | $0.00095 |
Grade A, and why
mainline-layerfs 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 yesterday.
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.
The source is not reproduced here
A licence we could not identify
The repository carries a LICENSE file, but it is custom or dual enough that GitHub cannot name it and neither can this catalogue. Unknown terms are not permission, so the body is not copied here. Read the licence at the source and decide for yourself.
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.
- yesterday First seen · 71 lines · 21 tokens per session scan A af089d867137
mainline-layerfs is a skill published in the GitHub repository mainline-org/mainline (199 stars, last pushed 2d ago), with no licence file. It adds 21 tokens to every session and 947 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 2026-10-28.
Other skills, from other repositories
cartographer-kb-conflict-resolve
Guide an agent through resolving open git rebase conflicts on degraded KB concepts.
end
Close a work session — log what happened, update state and the decision log, propose durable memory updates, and check for uncommitted or unpushed work.
source-command-github-github-modes
Migrated source command github-github-modes.
source-command-github-github-swarm
Migrated source command github-github-swarm.
source-command-github-code-review
Migrated source command github-code-review.
commit-history
List recent git commits linked to agent sessions, optionally filtered by branch or repo. Use when the user asks "show agent commits", "what has the agent shipped", "list linked commits", or wants commits with their session context.