confluent-cloud-flink-sql

confluent-cloud-flink-sql is a skill for Claude Code, Codex from confluentinc/agent-skills. It costs 234 tokens per session (2,342 once invoked), scanned A, original, Apache-2.0.

Instructions for writing and checking SQL for Confluent Cloud Flink, a hosted service that processes streaming data with SQL. They distinguish it from Apache Flink, the open-source project, because the two do not support exactly the same SQL.

In plain words
What is it for?
Use them when writing, debugging, or verifying Flink SQL for a Confluent Cloud compute pool, including checking documentation and running real CLI tests.
Why use it?
They help prevent valid-looking Apache Flink queries from failing or behaving differently in Confluent Cloud.

Skill for Claude CodeCodex

Part of the streaming-skills-plugin plugin — 16 skills shipped together

About the project

AI Agent Skills by Confluent is a collection of skills for building Kafka producers, Flink applications, and real-time data-streaming pipelines. Developers use it with coding assistants when creating applications and pipelines on Confluent. The catalogue entries are its skills, plugin, and instruction.

confluentinc/agent-skills · 54 stars · on GitHub

Install

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.

agentmods
npx agentmods add skills/confluentinc/agent-skills/confluent-cloud-flink-sql
Any agent
npx skills add confluentinc/agent-skills --skill confluent-cloud-flink-sql
Clone the repo
git clone --depth 1 https://github.com/confluentinc/agent-skills

Made for: Claude Code, Codex.

Or install streaming-skills-plugin, the plugin that ships this one along with the rest of its 16 skills.

Wrote 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.

agentmods badge for confluent-cloud-flink-sql

README.md
[![agentmods](https://agentmods.dev/badge/skills/confluentinc/agent-skills/confluent-cloud-flink-sql.svg)](https://agentmods.dev/skills/confluentinc/agent-skills/confluent-cloud-flink-sql)
Your own site
<a href="https://agentmods.dev/skills/confluentinc/agent-skills/confluent-cloud-flink-sql"><img src="https://agentmods.dev/badge/skills/confluentinc/agent-skills/confluent-cloud-flink-sql.svg" alt="Measured on agentmods" height="20"></a>
Per session 234 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,342 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5 $0.00234 $0.02342
Opus 5 $0.00117 $0.01171
Sonnet 5 $0.00047 $0.00468
Haiku 4.5 $0.00023 $0.00234

Measured 5d ago against content hash f3217752f837, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

confluent-cloud-flink-sql 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 5d 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.

skills/confluent-cloud-flink-sql/SKILL.md · 112 lines

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.

Enforce the CC-Flink-vs-OSS-Flink dialect boundary and the CLI-driven verification loop for any Confluent Cloud Flink SQL work. Apache Flink OSS training data is a trap — CC rejects or silently mishandles a long list of otherwise-valid Flink SQL constructs.

Scope note: this skill's reference material is built around the OSS-vs-CC dialect boundary — traps in constructs that exist in both dialects but behave differently. It does not yet catalog CC-only DDL that has no OSS counterpart (e.g. CREATE MATERIALIZED TABLE, CREATE MODEL/AI_COMPLETE, CREATE AGENT, USE CATALOG). For those, verify directly against the CC Flink SQL reference rather than expecting a trap entry here.

Non-negotiables

  1. CC Flink ≠ Apache Flink. Verify every API, SQL construct, and runtime behavior against:
  2. No mocks in verification. Integration claims require real confluent CLI runs. Unit tests may mock; anything calling itself "end-to-end verification" may not.
  3. Record decisions somewhere durable. Ask the user where they want dialect traps and verification notes tracked (e.g. docs/flink-dialect-traps.md in their project) before writing any new file — don't assume a docs/ layout.
  4. Secrets never in repo. CREATE CONNECTION parameters are Terraform-injected, never hardcoded. Gitignore .tfvars, .tfstate*, *.secret* from day one.
  5. EXPLAIN before CREATE. Always EXPLAIN a query before statement create — catches parse/type errors without consuming CFUs.
  6. Don't invent identifiers. Use <placeholder> for any topic, table, statement, or resource name you haven't verified.

Read the full file on GitHub · 112 lines

Files

What ships with it

7 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.

Changes

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.

  1. 5d ago First seen · 112 lines · 234 tokens per session scan A f3217752f837

Subscribe to this mod's changes

confluent-cloud-flink-sql is a skill published in the GitHub repository confluentinc/agent-skills (54 stars, last pushed yesterday), licensed Apache-2.0. It adds 234 tokens to every session and 2,342 once invoked, about $0.0012 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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