confluent-cloud-cdc-tableflow

confluent-cloud-cdc-tableflow is a skill for Claude Code from confluentinc/agent-skills. It costs 203 tokens per session (6,309 once invoked), scanned A, original, Apache-2.0.

A workflow for sending database changes to Confluent Cloud and then into Iceberg or Delta Lake tables. Change Data Capture, or CDC, records inserts, updates, and deletes as they happen in a database.

In plain words
What is it for?
It is for setting up CDC pipelines from supported databases through Debezium, Kafka, Flink, Schema Registry, and Tableflow, using JSON Schema, Avro, or Protobuf formats.
Why use it?
It provides a defined pipeline that decodes and transforms database-change events before turning them into lakehouse tables, avoiding an unsafe direct connection from source topics to Tableflow.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

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

Made for: Claude Code.

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-cdc-tableflow

README.md
[![agentmods](https://agentmods.dev/badge/skills/confluentinc/agent-skills/confluent-cloud-cdc-tableflow.svg)](https://agentmods.dev/skills/confluentinc/agent-skills/confluent-cloud-cdc-tableflow)
Your own site
<a href="https://agentmods.dev/skills/confluentinc/agent-skills/confluent-cloud-cdc-tableflow"><img src="https://agentmods.dev/badge/skills/confluentinc/agent-skills/confluent-cloud-cdc-tableflow.svg" alt="Measured on agentmods" height="20"></a>
Per session 203 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 6,309 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 5.1 $0.00203 $0.06309
Opus 5 $0.00102 $0.03155
Sonnet 5 $0.00041 $0.01262
Haiku 4.5 $0.00020 $0.00631

Measured 6d ago against content hash 2b3ac196cee8, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

confluent-cloud-cdc-tableflow 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.

skills/confluent-cloud-cdc-tableflow/SKILL.md · 523 lines

How it starts

The opening of the file, as written. The whole thing — 523 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Confluent Cloud CDC to Tableflow Pipeline

Build production-ready Change Data Capture pipelines that stream database changes through Confluent Cloud to Iceberg or Delta Lake tables using Debezium, Flink, and Tableflow.

Overview

This skill automates the setup of a complete CDC pipeline:

Database → Debezium CDC Connector → Kafka + Schema Registry → Flink (decode & transform) → Tableflow → Iceberg/Delta Tables

Supported Databases (Fully-Managed Debezium Connectors Only)

  • Microsoft SQL Server CDC Source V2
  • MySQL CDC Source V2
  • PostgreSQL CDC Source V2
  • Oracle XStream CDC Source
  • DynamoDB CDC Source

Key Components

  1. Debezium CDC Source Connector: Captures database changes as events
  2. Schema Registry: Manages Avro/JSON/Protobuf schemas (default: JSON_SR)
  3. Confluent Cloud Flink: Decodes Debezium envelopes and transforms data
  4. Tableflow: Native Confluent Cloud feature that materializes Kafka topics as Iceberg or Delta tables

Critical Architecture Rules

1. NEVER enable Tableflow directly on CDC source topics.

Always use the Flink decode pattern: CDC Source Topic → Flink INSERT → Target Topic (changelog.mode = 'upsert') → Tableflow.

CDC connectors with tombstones.on.delete=true produce null-value Kafka records (tombstones) on DELETE operations. If Tableflow is enabled directly on the CDC source topic, it will use APPEND mode by default and immediately suspend when it encounters a tombstone: "Tableflow will be suspended because we detected a Kafka record with a null value."

The Flink decode layer solves this by interpreting Debezium CDC semantics natively — it translates DELETEs into proper retract/tombstone messages that upsert-mode Tableflow handles correctly.

Do NOT use after.state.only=true as a shortcut to bypass the Flink decode step. While it strips the Debezium envelope, tombstone records from DELETEs still break APPEND-mode Tableflow. Additionally, OracleXStreamSource does not support the after.state.only configuration option at all.

Read the full file on GitHub · 523 lines

Files

What ships with it

6 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. 6d ago First seen · 523 lines · 203 tokens per session scan A 2b3ac196cee8

Subscribe to this mod's changes

confluent-cloud-cdc-tableflow is a skill published in the GitHub repository confluentinc/agent-skills (54 stars, last pushed 2d ago), licensed Apache-2.0. It adds 203 tokens to every session and 6,309 once invoked, about $0.0010 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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