Developer deadlines — deprecations, removed APIs and build breaks

Oracle JDK License Gate

VS Code extension

Finds the Java lines in your build that Oracle now bills for, and the free line that replaces each one

VS Code Marketplace: 1535 installs

Python Upgrade Lint: Removed Stdlib 3.12-3.14

VS Code extension

Find every import and call that Python 3.12, 3.13 or 3.14 removed before you leave Python 3.10 (end of life October 2026). 43 rules.

VS Code Marketplace: 568 installs

JDK 25 Upgrade Blocker Lint

VS Code extension

Finds the Java lines the new LTS removed — 18 rules; 23 findings in one 64-line fixture

VS Code Marketplace: 538 installs

pypdf Migration Check - PyMuPDF AGPL Licence Gate

VS Code extension

Map every fitz / PyMuPDF line to its pypdf, pdfplumber or pypdfium2 replacement

VS Code Marketplace: 435 installs

Python 3.10 End of Life — Pin Check & Fix

VS Code extension

Python 3.10 end of life was 2026-10-01 (3.10.22 final, no more security patches).

VS Code Marketplace: 327 installs

Miniforge Migration Check: Anaconda in Docker, CI

VS Code extension

Flags continuumio/miniconda3 images, repo.anaconda.com installers, setup-miniconda without miniforge-version, conda tos accept and CONDA_PLUGINS_AUTO_ACCEPT_TOS in…

VS Code Marketplace: 52 installs

Coverage Gate Lint

VS Code extension

Finds the coverage gates in your repo that can never fail a build

VS Code Marketplace: 43 installs

VSCodium Migration Lint: Microsoft-only Extensions

VS Code extension

VSCodium migration check for extensions.json and devcontainer.json: 16 rules, licence clause and open replacement per finding

VS Code Marketplace: 41 installs

Firmware Release Gate for sdkconfig and prj.conf

VS Code extension

Finds the build-config lines that ship an ESP-IDF or Zephyr device with secure boot off, a debug port open, unsigned images or plaintext OTA.

VS Code Marketplace: 35 installs

pyproject.toml Release Gate (PEP 639)

VS Code extension

19 date-aware checks on the [project] metadata that decides whether your next release uploads

VS Code Marketplace: 29 installs

Rancher Desktop Migration Check — Docker Desktop licence lines

VS Code extension

Every Docker Desktop-only line in your repo, with the Rancher Desktop line that replaces it

VS Code Marketplace: 27 installs

OWASP Dependency Check Config Lint

VS Code extension

OWASP dependency check setup lint with 10 rules: the sample pom.xml returns 6 findings (3 errors, 3 warnings) — plugin 8.4.3 below the 12.1.0 mandatory upgrade of…

VS Code Marketplace: 27 installs

MCP Server Config Audit

VS Code extension

Audit one mcp.json for what an agent config gives away — inline API keys, unpinned npx launches, plaintext remote servers, shell wrappers, auto-approved tools,…

VS Code Marketplace: 25 installs

Xcode 26 SDK Gate for GitHub Actions

VS Code extension

Xcode 26 App Store Connect SDK requirement: which Xcode each CI job really builds with, and the fix line

VS Code Marketplace: 22 installs

Linker Map Auditor - FLASH & RAM budget for GNU ld map files

VS Code extension

Read the .map your linker already wrote and see, in exact bytes, which object file is spending your FLASH and RAM - and by how much you overflowed.

VS Code Marketplace: 21 installs

NiceGUI Migration Check: PySimpleGUI Licence Gate

VS Code extension

Flags the PySimpleGUI.net/install private index, the PySimpleGUI==5.0.8.3 PyPI stub, proprietary 5.x pins, a bare PySimpleGUIQt (5.0.0, Free To Use But Restricted),…

VS Code Marketplace: 20 installs

Intel HEX & S-record Image Audit

VS Code extension

Recomputes every checksum in a .hex or .s19 firmware image and names bad records, overlaps, gaps and records after the EOF by line

VS Code Marketplace: 19 installs

Podman Migration Check — Docker Desktop ties

VS Code extension

Podman migration check for compose.yaml, Dockerfile, devcontainer.json and CI: a 17-line compose.yaml returns 6 findings (3 errors, 3 warnings) — docker.sock,…

VS Code Marketplace: 17 installs

Google Play Release Blocker Lint - target API 36, Billing 8, 16 KB

VS Code extension

Finds the lines that make Google Play reject your release - target API below 36, Billing Library below 8, 4 KB-only native libs - and prints the date each gate closed.

VS Code Marketplace: 15 installs

conda-forge PyTorch Channel Migration Check

VS Code extension

Flags -c pytorch, pytorch:: prefixes, pytorch-cuda, cpuonly and torch pins below 2.6.0 in environment.yml, Dockerfiles and CI YAML, with the conda-forge line for each.

VS Code Marketplace: 13 installs

rf-detr Migration Check — Ultralytics YOLO ties

VS Code extension

rf-detr migration check for Dockerfiles, requirements.txt, pyproject.toml, environment.yml and Python: a 12-line Dockerfile returns 6 findings (4 errors, 2 warnings) —…

VS Code Marketplace: 13 installs

F-Droid Inclusion Gate - non-free Gradle dependency map

VS Code extension

F-Droid migration check for build.gradle: 25 rules for Play Services, Firebase, Crashlytics, Play Billing, trackers and Maven repos, each with its FOSS replacement line

VS Code Marketplace: 13 installs

MySQL 8.4 Upgrade Lint (RDS MySQL 8.0)

VS Code extension

MySQL upgrade 8.0 → 8.4: finds the SQL, my.cnf and parameter-group lines that MySQL 8.4 removed, with the fix on each line

VS Code Marketplace: 12 installs

PostgreSQL 17 Upgrade Map: Azure Extended Support

VS Code extension

Finds Azure PostgreSQL 11-14 version pins in Terraform, with the monthly Extended Support bill and the version = "17" line

VS Code Marketplace: 11 installs

helm chart lint Chart.yaml - Helm 4 Release Gate

VS Code extension

Every broken Chart.yaml line with its replacement line, before Helm 3 security fixes end 2026-11-11

VS Code Marketplace: 11 installs

AKS LTS & EKS Extended Support Lint for Terraform

VS Code extension

Terraform EKS and AKS version check: sample clusters.tf on 2026-09-27 — $2,256 extra on EKS 1.32 since 2026-03-23, $3,660 on 1.31 since 2025-11-26, $5,916 total; 9 rules

VS Code Marketplace: 11 installs

Apache ECharts Migration: Highcharts Licence Map

VS Code extension

Every Highcharts line in package.json, .csproj, HTML or JS/TS, with the Apache ECharts line that replaces it

VS Code Marketplace: 10 installs

GHDL Migration Check — Vivado xsim to GHDL

VS Code extension

Flags VHDL lines Vivado xsim accepts but GHDL rejects: UNISIM, XPM, std_logic_unsigned, VHDL-2008 without --std=08, plain shared variables, encrypted IP. 12 rules.

VS Code Marketplace: 10 installs

SkiaSharp Migration Check for ImageSharp

VS Code extension

Flags the Six Labors lines under the Split License and the SkiaSharp fix for each

npm publish package.json gate: engines & SPDX

VS Code extension

Node 20 end of life, SPDX licence and provenance checks for package.json

composer.json Validate - PHP EOL Release Gate

VS Code extension

composer.json validate: end-of-life PHP floors and composer validate --strict fields, with the fix line

PostgreSQL 14 Upgrade Lint (Aurora/RDS 2027)

VS Code extension

PostgreSQL upgrade 14 → 17: finds the SQL and config lines that PostgreSQL 15, 16 and 17 removed, with the fix on each line

GitHub Actions Deprecation Lint: the 2026 runner and action EOL dates

VS Code extension

Node 20 is removed from GitHub-hosted runners on 2026-09-23 and ubuntu-22.04 deprecation opens 2026-09-17.

GNU Global C/C++ .vscode Config Pack

VS Code extension

21 rules that read the values in a shared .vscode folder, plus 45 snippets. VS Code loads a wrong value without a word - this names the line and the fix.

Flit Migration Check: setup.py to flit_core 4

VS Code extension

Map every setup.py, setup.cfg and old pyproject.toml line to its flit_core 4 replacement

OpenPDF Migration Check: iText AGPL Gate

VS Code extension

openpdf: 6 findings in one pom.xml, each mapped to OpenPDF 3.0.5 or PDFBox 3.0.8

Resend Migration Check: SendGrid code lint

VS Code extension

Twilio SendGrid retired its free Email API plan starting May 27, 2025.

GitLab CI/CD Migration Check for GitHub Actions

VS Code extension

20 rules that flag every GitHub Actions line GitLab cannot run as-is, and the ones that need GitLab Premium

Aurora MySQL 5.7 to 8.0 Upgrade Blocker Lint

VS Code extension

28 MySQL 8.0 removal rules for .sql, .cnf and Terraform, before Aurora MySQL v2 Extended Support year 3 on 1 Dec 2026

Ren'Py Release Gate

VS Code extension

Find the .rpy lines that compile clean and only break inside a player's save

go.mod Release Gate: /vN suffix and go line check

VS Code extension

go.mod check before you tag: /v2 suffix, supported Go line, toolchain, replace, require

DeviceTree Config Audit: 23 dtc-Style Rules, 50 Snippets

VS Code extension

status = "ok" compiles clean and the node never appears. 23 rules over 7 config languages, on the file you have open.

Yosys Migration Check - Vivado-only blockers

VS Code extension

6 findings on one Vivado board top, 12 rules, each with a Yosys-ready fix

AlmaLinux Migration Lint — CentOS 7/8

VS Code extension

AlmaLinux migration check for CentOS 7/8 Dockerfiles, .repo files, scripts and Ansible: 21 rules, each with the AlmaLinux fix

Cron Schedule Lint for crontab, Kubernetes CronJob, GitHub Actions, Spring and EventBridge

VS Code extension

Names every schedule line in the file you have open that fires at the wrong hour, twice, or never at all - and prints the next three times each one really fires, in the…

OpenVox Migration Check for Puppet

VS Code extension

Flags the Puppet package, repo, image and gem lines that change when a fleet moves to OpenVox

Brave Search API Migration Check — Google Custom Search & Bing

VS Code extension

Google Custom Search JSON API: existing customers must transition by 2027-01-01. Bing Search API v7 retired 2025-08-11. 19 rules map each line to the Brave Search API.

Livewire 3 Upgrade Blocker Lint

VS Code extension

The Livewire 2 lines that die quietly in Livewire 3 — named, with the v3 replacement beside each

Proto Wire Break Check

VS Code extension

Names the .proto edits that keep compiling and quietly change what old gRPC readers see

Postgres Migration Lock Lint

VS Code extension

Names every statement in a Rails, Django or raw SQL migration that takes a table-blocking Postgres lock, and prints the non-blocking rewrite. 36 rules, PostgreSQL 12-17.

Swift Package Manager Migration: CocoaPods Trunk

VS Code extension

Podfile and .podspec check before CocoaPods trunk turns read-only on 2026-12-02

Codeberg / GitLab.com Anonymous Fetch Lint

VS Code extension

Find every token-less gitlab.com fetch before the 60/hour anonymous cap of 2026-10-19

Proxmox Migration Check: VMware vSphere Lint

VS Code extension

Every vSphere line in Terraform, Packer and Ansible, mapped to its Proxmox VE replacement

gitlab-runner Compute Minutes Audit for GitLab CI

VS Code extension

Ranks every .gitlab-ci.yml job by GitLab.com cost factor and worst-case compute minutes, with the tags: line that moves it to your own gitlab-runner.

Valkey Migration Check — ElastiCache Redis ties

VS Code extension

Valkey migration check for Terraform, CloudFormation, compose and Dockerfiles: a 44-line main.tf returns 6 findings (3 errors, 3 warnings) — redis5.0 parameter group,…

FerretDB Migration Lint — MongoDB SSPL gate

VS Code extension

ferretdb migration check: SSPL MongoDB images (Community Server releases since October 16, 2018, SSPL Section 13) and FerretDB 2.7 gaps, line by line, 19 rules

MapLibre Migration Lint — Mapbox GL JS v2+

VS Code extension

MapLibre migration check for Mapbox GL JS v2+ code: 17 rules, each with the maplibre-gl fix

OpenBao Migration Lint — HashiCorp Vault

VS Code extension

OpenBao migration check for HashiCorp Vault scripts, Terraform, Helm values and server HCL: 14 rules, each with the OpenBao fix

Pytest Deprecation Lint (pytest 8 removals)

VS Code extension

Marks the lines in your test suite that current pytest no longer runs — and the config keys it silently ignores.

AI Model Retirement Lint

VS Code extension

Finds the LLM model IDs pinned in your code that vendors have already switched off, or have dated to switch off, with the replacement and the date.

AutoHotkey v2, TOML and DeviceTree checks for VS Code

VS Code extension

A DeviceTree overlay with status = "enabled" boots the node disabled and a TOML integer with a leading zero stops the parser. Neither is an editor error.

Flyway Migration Check — Liquibase 5 FSL ties

VS Code extension

Flyway migration check for pom.xml, Gradle, liquibase.properties and changelogs: a 38-line pom.xml returns 6 findings (3 errors, 3 warnings): liquibase.version 5.0.1,…

Forgejo Migration Check — Gitea 1.22 cutoff

VS Code extension

Lints docker-compose files for the Gitea to Forgejo switch: Gitea 1.23+ has no transparent upgrade (Forgejo, 18 Dec 2024), the first hop is Forgejo v10.0.x, Forgejo 11…

OpenTofu Migration Lint — Terraform

VS Code extension

OpenTofu migration check for Terraform, HCP Terraform, CI workflows and Dockerfiles: 13 rules, each with the OpenTofu fix

Cinc Migration Check: Chef Infra licence gate lint

VS Code extension

11 rules for bootstrap scripts, kitchen.yml, client.rb, Dockerfiles and CI workflows. The sample provision.sh gives 6 findings.

OpenIddict Migration Check: Duende IdentityServer

VS Code extension

Every Duende call in Program.cs mapped to OpenIddict, with the Duende edition price your setup needs

Crashlytics Migration Lint for App Center

VS Code extension

Crashlytics migration: find every leftover App Center SDK call and its replacement

PowerSync Migration Check: Realm Sync & Data API

VS Code extension

Find every Atlas Device Sync, Data API and HTTPS Endpoint call that stopped on 2025-09-30, with its PowerSync replacement

YugabyteDB Migration Check: CockroachDB SQL

VS Code extension

25 rules for CockroachDB .sql files that YugabyteDB YSQL rejects or reads differently, plus licence-key and telemetry settings

Dependency Checker — EOL Dates

VS Code extension

Dependency checker for package.json, composer.json and requirements.txt.

Action Runtime Sunset Lint

VS Code extension

Finds the GitHub Actions steps that stop running on 2026-09-23, with the version to move to

SSDF Attestation Audit for GitHub Actions

VS Code extension

14 rules, four CISA attestation sections, one workflow file

GitLab CI Break Lint

VS Code extension

Names the .gitlab-ci.yml lines your runner will reject after the next GitLab major upgrade

.NET EOL & CRA Support Window Gate

VS Code extension

Dates every target framework in a .csproj against Microsoft's end-of-support day and against the support period you promise

Kubernetes Removed API Lint

VS Code extension

15 checks for the apiVersions kubectl no longer serves, on the manifest open in your editor

PQC Deprecation Lint — RSA/ECC after 2030

VS Code extension

Dates every RSA, ECDSA, ECDH, DH, DSA, SHA-1, MD5, 3DES and ECB line against NIST IR 8547 (deprecated after 2030, disallowed after 2035) — 19 rules

Cloud Cost Landmine Lint for Terraform, CloudFormation and Kubernetes

VS Code extension

Names every line in the file you have open that starts a recurring cloud charge, with the published us-east-1 price and the date it changes by itself.

Runtime EOL and Deploy-Block Audit for Docker, CI and AWS Lambda

VS Code extension

Finds the end-of-life runtimes an AI assistant still writes for you — node:20, python3.9, ubuntu-22.04, nodejs20.x — and prints the exact date each one stops deploying.

rustfs migration map: MinIO to RustFS for compose, Helm and Terraform

VS Code extension

6 findings in one docker-compose.yml, each with the exact RustFS line. 15 rules.

Nexus Repository Pricing: Verdaccio Migration Map

VS Code extension

Verdaccio, Reposilite and Pulp lines for every Sonatype Nexus Repository URL before Community Edition's 40,000-component cap

Shouldly Migration Check for FluentAssertions

VS Code extension

Every FluentAssertions line with the Shouldly line that replaces it, and the 8.x licence flag

ArangoDB Migration Check: Neo4j End-of-Life Map

VS Code extension

Finds every Neo4j image, licence line, Bolt URI and driver in a sample docker-compose.yml and dates it against Neo4j end of life: 2026.06 ended 2026-07-30, 4.4 ended…

OpenSearch Migration Check: Elasticsearch & Kibana cutover lint

VS Code extension

25 rules for compose files, elasticsearch.yml, Kibana config, Logstash pipelines, client pins and mappings.

GKE Extended Channel Fee Lint — Terraform

VS Code extension

GKE Extended channel fee check for Terraform: 14 rules on google_container_cluster versions, fee start dates, forced upgrades and Extended channel blockers

RDS Extended Support Cost Lint for Terraform

VS Code extension

Prices the AWS Extended Support surcharge on every RDS and Aurora database in your .tf files

Image Host Transfer Lint

VS Code extension

Names every image, font, badge and embed in your docs that sends an EU reader's IP outside the EEA - and the fix for each one.

Ingress-NGINX Retirement Lint

VS Code extension

Names the Gateway API field that replaces each retired ingress-nginx annotation — or tells you there isn't one

Terraform Provider Pin Lint

VS Code extension

Finds the .tf lines a clean terraform init is still free to move

Terraform State Secret Leak Lint

VS Code extension

Names the attributes, outputs and backends that copy a cleartext secret into terraform.tfstate

Livewire Client Surface Audit

VS Code extension

Marks every line of a Livewire or Blade file that the visitor's browser can call, rewrite or read

ERB Escape Audit - Rails XSS lint

VS Code extension

15 rules that find every line in a Rails .erb view where output escaping was switched off or was the wrong escaping.

EN 18031 / PSTI Device Config Lint

VS Code extension

Line-by-line check of shipped device defaults against RED Art. 3(3)(d)(e)(f), EN 18031-1/-2/-3 and UK PSTI Schedule 1

Angular Removed-API Lint

VS Code extension

32 checks for Angular APIs that were removed or deprecated, plus the support window on your version pin.

Base Image EOL Lint - Dockerfile and CI end-of-life check

VS Code extension

Marks every base image in your Dockerfiles, compose files and CI workflows whose security patches have already stopped - or stop before 13 November 2026 - and prints the…

Config & DSL Lint + Snippets — 9 Sets

VS Code extension

Your config files are never compiled — nothing fails until deploy. 36 snippets and 28 lint rules for 9 of them, inside the editor, offline.

Design Patterns in Java | Class Count, Cost, Runnable Code

Spreadsheet calculator

Count the concrete classes Bridge saves over subclassing (A × I vs A + I) and price the gap at your own hourly rate: 8 inputs, 12 formulas, 6 runnable Java files (JDK…

Recruiting workflow template for n8n: applicant retention clock (US EEOC/OFCCP, Germany AGG)

Every applicant gets a hold-until and delete-from date the moment they apply or are rejected: 1 year under 29 CFR 1602.14, 2 years for federal contractors with 150+…

sglang Migration Check: NVIDIA NIM Licence Gate

VS Code extension

Every NVIDIA NIM line in Dockerfile, compose, Helm and Terraform, with the SGLang or vLLM line that replaces it — 11 rules

Recruiting Workflow Template for n8n: UK, US and Germany Candidate Retention Dates

UK rejection window now 6 months (from 2026-10-01). 6 n8n workflows run your pipeline in your own Google Sheet and stamp a delete-by date on every rejected candidate:…

Tiptap Migration Check — TinyMCE Legacy Fee & Licence Cost Calculator (2026)

Spreadsheet calculator

Still on TinyMCE 6 in Tiny Cloud? Tiny adds a legacy flat fee ($30 Essential, $55 Professional a month, annual billing) and charges $65 instead of $40 per extra 1,000…

Proxmox Migration Check: VMware 72-Core Licence Cost Calculator (2026)

Spreadsheet calculator

Since 10 April 2025 Broadcom bills every VMware order for at least 72 cores and every CPU for at least 16, so one 8-core host pays for 64 cores it does not have, plus…

Gallery Model Release Form for Photographers – California Civil Code 3344 and New York Civil Rights Law 50 Consent

WordPress plugin

California Civil Code 3344: using a person's photograph to advertise your services without their prior consent (a parent's or legal guardian's for a minor) costs the…

SeaweedFS Migration Lint — MinIO Compose & K8s

VS Code extension

SeaweedFS migration check for MinIO docker-compose, Kubernetes, .env and mc scripts: 17 rules, each with the SeaweedFS fix

GlitchTip Migration Lint for Sentry

VS Code extension

GlitchTip migration: find every Sentry setting GlitchTip drops before you switch the DSN

PySide6 Migration Lint: PyQt5/PyQt6 Licence Gate

VS Code extension

14 rules flag PyQt5/PyQt6 imports and the PyQt-only APIs that break under LGPL PySide6, one fix per line

Pekko Migration Gate — Akka BSL licence check

VS Code extension

Pekko migration check: Akka 2.9.x is BSL 1.1 until at least 2026-10-23, Akka 2.8.8 until 2027-10-28 — each Akka release has its own Change Date.

Vagrantfile EOL Box Lint

VS Code extension

6 findings in 1 file: boxes past end of support, with the date and the box to move to

Python Log Leak Lint: PCI DSS Card Data

VS Code extension

Finds card numbers, CVV, track data, PINs, passwords and auth headers in Python log, print and raise calls, with 10 rules

Notebook Share Gate

VS Code extension

18 rules that read saved .ipynb outputs — 23 findings in the 6-cell sample notebook, 0 in the cleared one

Payroll Rate Expiry Lint

VS Code extension

The day your rate table stopped being correct, with the line number

MDR Legacy Sunset Clock 2026

Browser extension · Chrome, Edge, Firefox

Which Regulation (EU) 2023/607 date your legacy device actually falls under, and how many days are left.

Tailwind v4 Upgrade Blocker Lint

VS Code extension

19 rules that find the Tailwind v3 syntax Tailwind v4 removed or silently redefined, in the file you have open, with the v4 replacement on the same line.

Swift 6 Concurrency Migration Lint

VS Code extension

11 rules that name the .swift lines Swift 6 language mode rejects — 13 findings, 6 build-blocking, on the 47-line fixture

Lit Template Binding Audit

VS Code extension

Finds the lit-html binding positions auto-escaping does not cover, before the component ships

OTel Collector Drift Lint

VS Code extension

Finds the removed components and renamed attributes in an OpenTelemetry Collector config before the upgrade does

MCP Config Guard - agent config lint

VS Code extension

Reads .mcp.json / .vscode/mcp.json / claude_desktop_config.json while you edit it and marks the lines that hand an AI agent more than you meant - unpinned servers,…

EU Data Residency Lint (Terraform, GDPR Ch. V)

VS Code extension

Every cloud region in your infrastructure code, mapped to a country and the transfer basis it needs.

MCP 2026 Migration Lint

VS Code extension

The 2026-07-28 MCP revision removed the initialize handshake, sessions, ping and 4 more RPCs.

SPDX License Field Lint for package.json, pyproject.toml and Cargo.toml

VS Code extension

Reads the licence field in the open manifest and names every deprecated SPDX id, invalid string, PEP 639 leftover and copyleft obligation - with the exact replacement…

Salesforce API Version & CLI Retirement Lint

VS Code extension

Finds retired API versions and removed sfdx force:* commands in your DX repo before a deploy or a CI run fails with 410 GONE.

Manifest Snippets + Removed-API Audit (8 Sets)

VS Code extension

For platform engineers on AKS: 28 rules naming every removed apiVersion, literal credential and :latest tag in the file you have open, and 40 snippets written against…

BEM Class Auditor for HTML and SCSS

VS Code extension

16 BEM naming rules read the HTML file you have open and 22 markup and SCSS skeletons write the stylesheet shell, so the class names get fixed before the pull request…

Tax Year Constant Drift

VS Code extension

Finds the tax years, statutory limits, filing thresholds, rates and deadlines hardcoded in payroll and invoicing code - the constants an AI assistant completes from a…

Hugging Face Model Licence Matrix — all 70 model-card `license:` identifiers × the 4 questions a commercial release turns on

Copy the `license:` string off the model card, read four rows, close the review ticket — 70 identifiers, 4 questions, 280 rows, every row naming the clause it came from.

FBA Profit & Break-Even Calculator for Amazon Private-Label Sourcing — Chrome Extension + Web Tool

Browser extension · Chrome, Edge, Firefox

Amazon's referral fee is 15% in most categories with a $0.30 per-item minimum (Amazon Seller Central published US fee schedule): quote a supplier without it and every…