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 OpenLinkSoftware/ai-agent-skills --skill virtuoso-rdf-loadergit clone --depth 1 https://github.com/OpenLinkSoftware/ai-agent-skillsWrote 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/openlinksoftware/ai-agent-skills/virtuoso-rdf-loader)<a href="https://agentmods.dev/skills/openlinksoftware/ai-agent-skills/virtuoso-rdf-loader"><img src="https://agentmods.dev/badge/skills/openlinksoftware/ai-agent-skills/virtuoso-rdf-loader/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/openlinksoftware/ai-agent-skills/virtuoso-rdf-loader"><img src="https://agentmods.dev/badge/skills/openlinksoftware/ai-agent-skills/virtuoso-rdf-loader.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 2 findings, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Privilege Escalation · line 260 Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
- medium Privilege Escalation · line 260 Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.Fix: Avoid sudo/root unless strictly required. Prefer least-privilege patterns. If elevation is needed, document the justification and scope.
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 | $0.00136 | $0.03216 |
| Opus 5 | $0.00068 | $0.01608 |
| Sonnet 5 | $0.00027 | $0.00643 |
| Haiku 4.5 | $0.00014 | $0.00322 |
Grade B, and why
virtuoso-rdf-loader scanned grade B 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 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.
Asks for rootmediumPrivilege escalation
A mod that escalates privileges can change anything on the machine, not only the project.
| `Permission denied` on `--dir` | Virtuoso server user can't read directory | `chmod 755` the directory and `chmod 644` the files | How it starts
The opening of the file, as written. The whole thing — 332 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Virtuoso RDF Bulk Loader Skill
ld_dir + rdf_loader_run · isql · N-Triples · Turtle · RDF/XML · N-Quads · TriG · JSON-LD · Notation3 · gzip
Purpose
Load RDF archives directly into a Virtuoso quad store — no pre-extraction needed. Virtuoso's ld_dir + rdf_loader_run reads compressed files (.gz, .bz2) natively and supports every major RDF serialization. The skill provides:
- Single-file loads — one archive → one named graph
- Directory loads — every matching file in a server-side directory
- Graph management — clear before load, append, or replace
- Progress monitoring — poll
DB.DBA.LOAD_LISTuntil completion - Error triage — interpret load errors and suggest fixes
Supported Formats
| Format | Extensions | Notes |
|---|---|---|
| N-Triples | .nt, .nt.gz, .nt.bz2 |
Line-based; fastest for bulk |
| Turtle | .ttl, .ttl.gz, .ttl.bz2 |
Compact; common for LOD |
| RDF/XML | .rdf, .rdf.gz, .rdf.bz2 |
Legacy; still widespread |
| N-Quads | .nq, .nq.gz, .nq.bz2 |
Quad format; includes graph IRIs |
| TriG | .trig, .trig.gz |
Multi-graph Turtle superset |
| JSON-LD | .jsonld, .jsonld.gz |
JSON-based; web-friendly |
| Notation3 | .n3, .n3.gz |
Superset of Turtle |
| OWL | .owl, .owl.gz |
RDF/XML variant |
All formats are handled by the same ld_dir + rdf_loader_run pipeline — no format-specific flags needed.
Execution Routing
Default order for data ingestion:
- isql CLI — direct
isql host:portexecution (preferred; always available) - MCP — if a
virtuoso-support-agentMCP server is connected, it can relay SQL - SPARQL INSERT — via SPARQL endpoint when isql path is unavailable (wraps individual INSERTs; unsuitable for bulk)
- URIBurner upload — when the data is at a URL and URIBurner's sponger is available
If the user names a specific mode, honor that preference.
Step 0 — Connection Detection (Always Run First)
# Check isql availability
which isql
# Quick connectivity test
echo "SELECT 'ok';" | isql <host>:<port> <user> <pass> 2>&1 | head -3
What ships with it
3 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 · 332 lines · 136 tokens per session scan B 6a7bce050969
virtuoso-rdf-loader is a skill published in the GitHub repository OpenLinkSoftware/ai-agent-skills (38 stars, last pushed today), licensed MIT. It adds 136 tokens to every session and 3,216 once invoked, about $0.0007 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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