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 aspectrr/deer --skill kafkagit clone --depth 1 https://github.com/aspectrr/deerWrote 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/aspectrr/deer/kafka)<a href="https://agentmods.dev/skills/aspectrr/deer/kafka"><img src="https://agentmods.dev/badge/skills/aspectrr/deer/kafka/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/aspectrr/deer/kafka"><img src="https://agentmods.dev/badge/skills/aspectrr/deer/kafka.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 | $0.00039 | $0.00915 |
| Opus 5.5 | $0.00016 | $0.00366 |
| Sonnet 5.5 | $0.00008 | $0.00183 |
| Haiku 4.5 | $0.00004 | $0.00092 |
Grade A, and why
kafka 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 1mo 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 — 112 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Kafka Operations
When to Use
- Managing Kafka topics (create, describe, delete, list)
- Monitoring consumer group lag
- Producing or consuming messages for testing
- Diagnosing broker connectivity issues
- Checking partition offsets and health
- Debugging logstash pipelines that read from or write to Kafka
Common Commands
Cluster Status
# Check broker health
kafka-broker-api-versions --bootstrap-server localhost:9092
# List topics with partition counts
kafka-topics --bootstrap-server localhost:9092 --list
# Describe a topic (partitions, replicas, ISR)
kafka-topics --bootstrap-server localhost:9092 --describe --topic <topic>
Topic Management
# Create topic
kafka-topics --bootstrap-server localhost:9092 --create --topic <name> --partitions 3 --replication-factor 1
# Delete topic
kafka-topics --bootstrap-server localhost:9092 --delete --topic <name>
# Increase partitions
kafka-topics --bootstrap-server localhost:9092 --alter --topic <name> --partitions <count>
Consumer Groups
# List all consumer groups
kafka-consumer-groups --bootstrap-server localhost:9092 --list
# Show consumer group lag (key debugging command)
kafka-consumer-groups --bootstrap-server localhost:9092 --describe --group <group>
# Reset consumer group offsets (use with caution)
kafka-consumer-groups --bootstrap-server localhost:9092 --group <group> --topic <topic> --reset-offsets --to-earliest --execute
Produce and Consume
# Produce a message with key
echo "key:value" | kafka-console-producer --bootstrap-server localhost:9092 --topic <topic> --property "parse.key=true" --property "key.separator=:"
# Consume messages from beginning
kafka-console-consumer --bootstrap-server localhost:9092 --topic <topic> --from-beginning --max-messages 10
# Consume with key and value
kafka-console-consumer --bootstrap-server localhost:9092 --topic <topic> --from-beginning --property print.key=true --property key.separator="|"
Offset Inspection
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.
- 1mo ago First seen · 112 lines · 39 tokens per session scan A 6dd166ffe52d
kafka is a skill published in the GitHub repository aspectrr/deer (405 stars, last pushed 6mo ago), licensed MIT. It adds 39 tokens to every session and 915 once invoked, about $0.0002 per session on Opus 5.5. 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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