api-connector-builder

api-connector-builder is a skill for Claude Code, Codex from ufy2024/AuC. It costs 36 tokens per session (678 once invoked), scanned A, original, MIT.

A guide for working with spreadsheet files such as Excel workbooks, CSV files, and tab-separated files. It covers creating, reading, editing, formatting, and checking spreadsheet outputs.

In plain words
What is it for?
Use it whenever a spreadsheet is the main input or output, including data cleanup, added columns, formulas, charts, and financial models.
Why use it?
It sets rules for consistent formatting, preserving existing templates, and avoiding formula errors in delivered files.

Skill for Claude CodeCodex

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/ufy2024/auc/api-connector-builder
Any agent
npx skills add ufy2024/AuC --skill api-connector-builder
Clone the repo
git clone --depth 1 https://github.com/ufy2024/AuC

Made for: Claude Code, Codex.

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 api-connector-builder

README.md
[![agentmods](https://agentmods.dev/badge/skills/ufy2024/auc/api-connector-builder.svg)](https://agentmods.dev/skills/ufy2024/auc/api-connector-builder)
Your own site
<a href="https://agentmods.dev/skills/ufy2024/auc/api-connector-builder"><img src="https://agentmods.dev/badge/skills/ufy2024/auc/api-connector-builder.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 678 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 $0.00036 $0.00678
Opus 5 $0.00018 $0.00339
Sonnet 5 $0.00007 $0.00136
Haiku 4.5 $0.00004 $0.00068

Measured 4d ago against content hash 934aa5732cc0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

api-connector-builder 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 4d 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.

Origin

Copies of this mod

8 near-identical copies found in the catalogue:

auc/skill_library/bundled/api-connector-builder/SKILL.md · 139 lines

How it starts

The opening of the file, as written. The whole thing — 139 lines — stays where its author put it; the contents beside it link to each section on GitHub.

API Connector Builder

Use this when the job is to add a repo-native integration surface, not just a generic HTTP client.

The point is to match the host repository's pattern:

  • connector layout
  • config schema
  • auth model
  • error handling
  • test style
  • registration/discovery wiring

When to Use

  • "Build a Jira connector for this project"
  • "Add a Slack provider following the existing pattern"
  • "Create a new integration for this API"
  • "Build a plugin that matches the repo's connector style"

Guardrails

  • do not invent a new integration architecture when the repo already has one
  • do not start from vendor docs alone; start from existing in-repo connectors first
  • do not stop at transport code if the repo expects registry wiring, tests, and docs
  • do not cargo-cult old connectors if the repo has a newer current pattern

Workflow

1. Learn the house style

Inspect at least 2 existing connectors/providers and map:

  • file layout
  • abstraction boundaries
  • config model
  • retry / pagination conventions
  • registry hooks
  • test fixtures and naming

2. Narrow the target integration

Define only the surface the repo actually needs:

  • auth flow
  • key entities
  • core read/write operations
  • pagination and rate limits
  • webhook or polling model

3. Build in repo-native layers

Typical slices:

  • config/schema
  • client/transport
  • mapping layer
  • connector/provider entrypoint
  • registration
  • tests

4. Validate against the source pattern

The new connector should look obvious in the codebase, not imported from a different ecosystem.

Reference Shapes

Provider-style

providers/
  existing_provider/
    __init__.py
    provider.py
    config.py

Connector-style

integrations/
  existing/
    client.py
    models.py
    connector.py

TypeScript plugin-style

src/integrations/
  existing/
    index.ts
    client.ts
    types.ts
    test.ts

Quality Checklist

  • matches an existing in-repo integration pattern
  • config validation exists
  • auth and error handling are explicit
  • pagination/retry behavior follows repo norms
  • registry/discovery wiring is complete
  • tests mirror the host repo's style
  • docs/examples are updated if expected by the repo

Read the full file on GitHub · 139 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. 4d ago First seen · 139 lines · 36 tokens per session scan A 934aa5732cc0

Subscribe to this mod's changes

api-connector-builder is a skill published in the GitHub repository ufy2024/AuC (1,091 stars, last pushed 1mo ago), licensed MIT. It adds 36 tokens to every session and 678 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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