ECC Not installing

What is the impact?

ECC will not install

What happened?

Microsoft Windows [Version 10.0.26200.9550] (c) Microsoft Corporation. All rights reserved.

C:\Users\admin>claude -v 2.1.283 (Claude Code)

C:\Users\admin>git -v git version 2.55.0.windows.5

C:\Users\admin>node -v v24.21.0

C:\Users\admin>npx [email protected] setup npm error code ETARGET npm error notarget No matching version found for [email protected]. npm error notarget In most cases you or one of your dependencies are requesting a package version that doesn't exist. npm error A complete log of this run can be found in: C:\Users\admin\AppData\Local\npm-cache_logs\2026-09-27T03_12_39_855Z-debug-0.log

C:\Users\admin>node --version v24.21.0

C:\Users\admin>git --version git version 2.55.0.windows.5

C:\Users\admin>claude --version 2.1.283 (Claude Code)

C:\Users\admin>npx [email protected] setup npm error code ETARGET npm error notarget No matching version found for [email protected]. npm error notarget In most cases you or one of your dependencies are requesting a package version that doesn't exist. npm error A complete log of this run can be found in: C:\Users\admin\AppData\Local\npm-cache_logs\2026-09-27T03_12_56_716Z-debug-0.log

C:\Users\admin>/plugin marketplace add https://github.com/affaan-m/ECC '/plugin' is not recognized as an internal or external command, operable program or batch file.

C:\Users\admin>/plugin install ecc@ecc '/plugin' is not recognized as an internal or external command, operable program or batch file.

C:\Users\admin>/plugin marketplace add https://github.com/affaan-m/ECC '/plugin' is not recognized as an internal or external command, operable program or batch file.

C:\Users\admin>/plugin install ecc@ecc '/plugin' is not recognized as an internal or external command, operable program or batch file.

C:\Users\admin>claude Welcome to Claude Code v2.1.283 ..........................................................

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░░░░░░░░░░░░░░░░░░░ * ██▓░░ ▓ Welcome to Claude Code v2.1.283 ..........................................................

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Claude Code can be used with your Claude subscription or billed based on API usage through your Console account.

Select login method:

1. Claude account with subscription · Pro, Max, Team, or Enterprise C:\Users\admin> Console account · API usage billing

1. 3rd-party platform · Amazon Bedrock, Microsoft Foundry, or Vertex AI C:\Users\admin> Press Ctrl-C again to exit C:\Users\admin>

C:\Users\admin>

C:\Users\admin>npx [email protected] install --guided
npm error code ETARGET npm error notarget No matching version found for [email protected]. npm error notarget In most cases you or one of your dependencies are requesting a package version that doesn't exist. npm error A complete log of this run can be found in: C:\Users\admin\AppData\Local\npm-cache_logs\2026-09-27T03_15_35_484Z-debug-0.log

C:\Users\admin> --harness claude --harness codex --harness kimi
'--harness' is not recognized as an internal or external command, operable program or batch file.

C:\Users\admin> --claude-scope local --claude-hooks standard
'--claude-scope' is not recognized as an internal or external command, operable program or batch file.

C:\Users\admin> --profile core --yes '--profile' is not recognized as an internal or external command, operable program or batch file.

C:\Users\admin>

Harness

Claude Code

Install method

ecc or ecc-install CLI

Operating system

Windows (native)

ECC and harness versions

No response

Optional redacted diagnostics

No response