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 cxcscmu/SkillLearnBench --skill maven-druid-buildgit clone --depth 1 https://github.com/cxcscmu/SkillLearnBenchWrote 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/cxcscmu/skilllearnbench/maven-druid-build)<a href="https://agentmods.dev/skills/cxcscmu/skilllearnbench/maven-druid-build"><img src="https://agentmods.dev/badge/skills/cxcscmu/skilllearnbench/maven-druid-build/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/cxcscmu/skilllearnbench/maven-druid-build"><img src="https://agentmods.dev/badge/skills/cxcscmu/skilllearnbench/maven-druid-build.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 | $0.00022 | $0.00752 |
| Opus 5 | $0.00011 | $0.00376 |
| Sonnet 5 | $0.00004 | $0.00150 |
| Haiku 4.5 | $0.00002 | $0.00075 |
Grade A, and why
maven-druid-build 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 9d 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 — 118 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Maven Build for Apache Druid
Build Command Reference
Full Build (from instructions)
cd /root/druid
mvn clean package \
-DskipTests \
-Dcheckstyle.skip=true \
-Dpmd.skip=true \
-Dforbiddenapis.skip=true \
-Dspotbugs.skip=true \
-Danimal.sniffer.skip=true \
-Denforcer.skip=true \
-Djacoco.skip=true \
-Ddependency-check.skip=true \
-pl '!web-console' \
-pl indexing-service \
-am
Flag Explanations
| Flag | Purpose |
|---|---|
clean |
Remove previous build artifacts |
package |
Compile and package into JAR/WAR |
-DskipTests |
Skip unit test execution |
-Dcheckstyle.skip=true |
Skip code style checking |
-Dpmd.skip=true |
Skip PMD analysis |
-Dforbiddenapis.skip=true |
Skip forbidden API checking |
-Dspotbugs.skip=true |
Skip SpotBugs (FindBugs) analysis |
-Danimal.sniffer.skip=true |
Skip JDK version compatibility checks |
-Denforcer.skip=true |
Skip Maven Enforcer rules |
-Djacoco.skip=true |
Skip code coverage analysis |
-Ddependency-check.skip=true |
Skip OWASP dependency checking |
-pl '!web-console' |
Exclude web-console module (memory constraint) |
-pl indexing-service |
Include indexing-service module |
-am |
Also make dependencies of selected projects |
Memory Management
Memory Issues
If you encounter OOM (Out of Memory) errors:
# Increase heap size
export MAVEN_OPTS="-Xmx2g -Xms1g"
# Very aggressive heap limit
export MAVEN_OPTS="-Xmx1g -Xms512m"
Parallel Builds
To speed up builds with multiple cores:
mvn clean package -T 1C # 1 thread per core
Output Artifacts
After successful build:
druid/indexing-service/target/druid-indexing-service-0.20.0-SNAPSHOT.jar
druid/distribution/target/apache-druid-0.20.0-SNAPSHOT/lib/
Verifying Build
# Check if JAR was created
ls -la indexing-service/target/*.jar
# Check build log for errors
tail -100 build.log
# Verify specific file was included
jar tf indexing-service/target/*.jar | grep "JavaScriptFilter"
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.
- 9d ago First seen · 118 lines · 22 tokens per session scan A 09f77d8e26d7
maven-druid-build is a skill published in the GitHub repository cxcscmu/SkillLearnBench (83 stars, last pushed 2mo ago), licensed MIT. It adds 22 tokens to every session and 752 once invoked, about $0.0001 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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