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 rossumai/claude-marketplace --skill rossum-referencegit clone --depth 1 https://github.com/rossumai/claude-marketplaceWrote 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/rossumai/claude-marketplace/rossum-reference)<a href="https://agentmods.dev/skills/rossumai/claude-marketplace/rossum-reference"><img src="https://agentmods.dev/badge/skills/rossumai/claude-marketplace/rossum-reference/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/rossumai/claude-marketplace/rossum-reference"><img src="https://agentmods.dev/badge/skills/rossumai/claude-marketplace/rossum-reference.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 | $0.00051 | $0.00658 |
| Opus 5 | $0.00026 | $0.00329 |
| Sonnet 5 | $0.00010 | $0.00132 |
| Haiku 4.5 | $0.00005 | $0.00066 |
Grade A, and why
rossum-reference 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 — 35 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Rossum.ai Platform Reference
This skill provides comprehensive reference documentation for the Rossum.ai document automation platform. For complete details, see reference.md.
Which Rossum API operations the rossum-api MCP server wraps is tracked in api-coverage.md (auto-generated). Read (GET) operations without a dedicated tool are still reachable through the generic rossum_get tool (shown as ✅ via rossum_get); ⬜ pending = an uncovered write with no MCP tool yet.
Verification Rule (read first)
Do not make assumptions. All technical decisions must be grounded in verified facts, and when uncertain you must ask before acting. API endpoints, field names, hook events, and operations payloads must be verified against the official docs at https://rossum.app/api/docs/openapi/guides/getting-started/#introduction or a live read-only probe before being written into code or documentation. If you must guess, label the claim Unverified — confirm before relying on this. Full rationale in ../__shared/verification-rules.md.
Safety Rules
Do not call write/mutating API tools without explicit user approval. This applies to all rossum_create_*, rossum_patch_*, rossum_delete_* tools, all data_storage write tools (insert, update, delete, replace, bulk_write, drop), and prd2 push/prd2 deploy commands. Read-only tools (list, get, find, aggregate, whoami) are fine without confirmation. When in doubt, describe what you intend to do and ask first.
Edit local .py files, not JSON. When modifying hook code or formula logic in a prd project, only edit the .py file. Never edit the code field in hook JSON or the formula property in schema.json — prd2 push syncs .py files into JSON automatically. Do not use rossum_patch_hook or rossum_patch_schema to push code changes that should go through prd2 push instead.
Customer-facing terminology
In SOWs, proposals, emails, and any other customer-facing material, write "Master Data Hub" in full — never "MDH" — and do not mention "Data Storage" (it is implementation; the product is Master Data Hub). Reference content and internal developer guidance can use "MDH" freely.
What ships with it
2 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.
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 · 35 lines · 51 tokens per session scan A 0005785ba83b
rossum-reference is a skill published in the GitHub repository rossumai/claude-marketplace (5 stars, last pushed 2d ago), licensed MIT. It adds 51 tokens to every session and 658 once invoked, about $0.0003 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 2026-08-31.
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