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 G1Joshi/Agent-Skills --skill cassandragit clone --depth 1 https://github.com/G1Joshi/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/g1joshi/agent-skills/cassandra)<a href="https://agentmods.dev/skills/g1joshi/agent-skills/cassandra"><img src="https://agentmods.dev/badge/skills/g1joshi/agent-skills/cassandra/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/g1joshi/agent-skills/cassandra"><img src="https://agentmods.dev/badge/skills/g1joshi/agent-skills/cassandra.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 | $0.00016 | $0.00438 |
| Opus 5 | $0.00008 | $0.00219 |
| Sonnet 5 | $0.00003 | $0.00088 |
| Haiku 4.5 | $0.00002 | $0.00044 |
Grade A, and why
cassandra 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 6d 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.
What it actually says
Apache Cassandra
Cassandra is a wide-column store database designed for scalability and high availability without compromising performance. Linear scalability and proven fault-tolerance on commodity hardware or cloud infrastructure make it the perfect platform for mission-critical data.
When to Use
- High Write Throughput: Ingests millions of writes per second.
- Always On: Zero single points of failure. Updates can happen even if nodes are down (Eventual Consistency).
- Multi-Region: Active-Active multi-region replication is built-in.
Quick Start (CQL)
CREATE TABLE users (
user_id UUID PRIMARY KEY,
name text,
email text
);
INSERT INTO users (user_id, name) VALUES (uuid(), 'Alice');
Core Concepts
Partition Key & Clustering Key
- Partition Key: Determines which node holds the data.
- Clustering Key: Sorts data within the partition on disk.
Tunable Consistency
You choose consistency level per query.
ANY: Fastest, least specific.QUORUM: Majority must acknowledge. Balanced.ALL: Slowest, safest.
Vector Search (5.0+)
Native support for Vector Search (ANN) allows using Cassandra as a Vector DB for AI apps.
Best Practices (2025)
Do:
- Query by Partition Key: Always. Scans are prohibited in production.
- Use SAI (Storage Attached Indexes): New in 5.0. Better than old secondary indexes.
- Denormalize: Optimize schema for Reads. It is okay to duplicate data into 3 tables to satisfy 3 different query patterns.
Don't:
- Don't use distributed joins: Cassandra doesn't do joins. Join in the app.
- Don't use large partitions: Keep partitions under 100MB to avoid compaction issues.
References
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.
- 6d ago First seen · 63 lines · 16 tokens per session scan A 196d6d76a917
cassandra is a skill published in the GitHub repository G1Joshi/Agent-Skills (12 stars, last pushed 7mo ago), licensed MIT. It adds 16 tokens to every session and 438 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 2026-09-03.
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