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 arc-mcp/arc-1 --skill sap-clean-core-atcgit clone --depth 1 https://github.com/arc-mcp/arc-1Wrote 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/arc-mcp/arc-1/sap-clean-core-atc)<a href="https://agentmods.dev/skills/arc-mcp/arc-1/sap-clean-core-atc"><img src="https://agentmods.dev/badge/skills/arc-mcp/arc-1/sap-clean-core-atc/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/arc-mcp/arc-1/sap-clean-core-atc"><img src="https://agentmods.dev/badge/skills/arc-mcp/arc-1/sap-clean-core-atc.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
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 | $0.00075 | $0.02853 |
| Opus 5 | $0.00037 | $0.01426 |
| Sonnet 5 | $0.00015 | $0.00571 |
| Haiku 4.5 | $0.00007 | $0.00285 |
Grade A, and why
sap-clean-core-atc 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 11d 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.
How it starts
The opening of the file, as written. The whole thing — 206 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SAP Clean Core ATC Classification
Inventory a package of custom code and bucket every Z/Y object into Clean Core Levels A–D based on the SAP APIs it uses — the "is this cloud-ready?" audit.
This is different from migrate-custom-code: that skill fixes one object's ATC findings; this one produces a package-wide classification report with per-object levels, used to plan a clean-core / BTP migration. It combines ARC-1 (ATC + source access) with mcp-sap-docs (released-API classification data from SAP/abap-atc-cr-cv-s4hc).
Clean Core Levels (what they mean)
| Level | Meaning | Cloud-ready? |
|---|---|---|
| A | Uses only released SAP APIs | ✅ Yes — move as-is to ABAP Cloud / BTP |
| B | Uses classic APIs (on-premise-only, documented) | 🟡 Works on on-prem S/4HANA; needs rewrite for cloud |
| C | Uses internal/stable SAP objects (not customer-released) | 🔴 Supported today but no API guarantee |
| D | Uses objects with no API status (deep internals, undocumented) | 🔴 High migration risk, may break on upgrade |
Source: SAP/abap-atc-cr-cv-s4hc — SAP's official machine-readable release state list.
These are the extensibility levels (SAP Note 3578329) — which SAP APIs your code calls. SAP defines a separate A–D scale for integration technologies in Note 3690029 (RFC, IDoc, SEGW OData, file transfer …), which "complements, but does not overlap with" this one. Same letters, different axis: never merge the two into one score. For the integration axis use the Integration Interfaces section of sap-migration-dossier.
Smart Defaults (apply silently, do NOT ask)
| Setting | Default | Rationale |
|---|---|---|
| Target system type | public_cloud |
Clean-core audits almost always target cloud readiness |
| ATC variant | ABAP_CLOUD_READINESS if available, else the system default |
Cloud readiness is the point of the exercise; verify the name with atc_variants first |
| Include in scope | Z*, Y*, plus any /namespace/* the user names |
Customer code only; skip SAP-shipped |
| Report detail | Summary table + level-breakdown + top violations | Actionable overview; drill-down on request |
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.
- 11d ago First seen · 206 lines · 75 tokens per session scan A 84b71b31e4c0
sap-clean-core-atc is a skill published in the GitHub repository arc-mcp/arc-1 (189 stars, last pushed today), licensed MIT. It adds 75 tokens to every session and 2,853 once invoked, about $0.0004 per session on Opus 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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