evaluate-connector

evaluate-connector is a skill for Claude Code from fivetran/connector_sdk_tools. It costs 36 tokens per session (2,075 once invoked), scanned A, original, MIT.

A read-only review tool for a Fivetran connector, which moves data from another service into a database or warehouse, using Fivetran’s Connector SDK rules.

In plain words
What is it for?
Use it to inspect connector source files and report issues in the implementation, declared packages, or use of the Fivetran Connector SDK.
Why use it?
It helps find concrete code, security, reliability, and SDK-compliance problems before the connector is deployed.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter.

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/fivetran/connector_sdk_tools/evaluate-connector
Any agent
npx skills add fivetran/connector_sdk_tools --skill evaluate-connector
Clone the repo
git clone --depth 1 https://github.com/fivetran/connector_sdk_tools

Made for: Claude Code.

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 evaluate-connector

README.md
[![agentmods](https://agentmods.dev/badge/skills/fivetran/connector_sdk_tools/evaluate-connector.svg)](https://agentmods.dev/skills/fivetran/connector_sdk_tools/evaluate-connector)
Your own site
<a href="https://agentmods.dev/skills/fivetran/connector_sdk_tools/evaluate-connector"><img src="https://agentmods.dev/badge/skills/fivetran/connector_sdk_tools/evaluate-connector.svg" alt="Measured on agentmods" height="20"></a>
Per session 36 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,075 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 $0.00036 $0.02075
Opus 5 $0.00018 $0.01038
Sonnet 5 $0.00007 $0.00415
Haiku 4.5 $0.00004 $0.00208

Measured 6d ago against content hash ec1d0d299452, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

evaluate-connector 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.

canonical/skills/evaluate-connector/SKILL.md · 187 lines

How it starts

The opening of the file, as written. The whole thing — 187 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Context: This plugin is for the Fivetran Connector SDK (CSDK). "CSDK" is shorthand for "Connector SDK".

Evaluate Connector

FIRST: Read sdk-reference.md from the plugin directory to load SDK rules and patterns.

Perform a static code evaluation of the connector. This is a read-only analysis — do NOT modify any files.

If no connector name is provided: Ask which connector to evaluate. List any directories in the workspace that contain a connector.py file as options.

Step 1: Read Connector Code

Read all source files in the connector directory:

  • connector.py — required; main implementation
  • Any other .py files present
  • requirements.txt — if present, check for incorrectly declared pre-installed packages

Do NOT read or log any values from configuration.json.

If connector.py is missing, tell the user and stop.

Step 2: Evaluate

Analyze the code against the criteria below. Be deterministic and conservative — only flag issues with concrete code evidence. Do NOT flag theoretical or hypothetical problems.


CRITICAL SDK RULE — read before evaluating anything: SDK operations (op.upsert, op.update, op.delete, op.checkpoint) must be called directly. They are NOT generators and must NEVER be used with yield or yield from.

  • WRONG: yield op.upsert(table="x", data=d)
  • CORRECT: op.upsert(table="x", data=d)

update() is a plain function, not a generator. yield from is only valid inside helper pagination functions that stream raw API records — it is never valid with SDK operations.

If you find code that calls SDK operations without yield, that is correct. Do not flag it.


REQUIRED Issues — Must Fix

Flag as required only when the code clearly demonstrates the problem.

1. Memory & Resource Management

  • Entire dataset loaded into memory before processing (e.g., accumulating all records in a list before iterating)
  • Files or connections opened without a context manager and without explicit .close()
  • Unbounded data structures that grow without limits

Read the full file on GitHub · 187 lines

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 · 187 lines · 36 tokens per session scan A ec1d0d299452

Subscribe to this mod's changes

evaluate-connector is a skill published in the GitHub repository fivetran/connector_sdk_tools (87 stars, last pushed 1mo ago), licensed MIT. It adds 36 tokens to every session and 2,075 once invoked, about $0.0002 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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