Can't upgrade/install Superpowers 6.0.0 on Windows due to "Filename too long" errors

[johnoshea]

• I searched existing issues and this is not a duplicate

Environment (required)

Field	Value
Superpowers version	6.0.0
Harness (Claude Code, Cursor, etc.)	Claude Code
Harness version	2.1.179
Your model + version	Opus 4.8
All plugins installed
OS + shell	Windows Server 2022 / PowerShell 7.6.1 running under Windows Terminal

Is this a Superpowers issue or a platform issue?

• I confirmed this issue does not occur without Superpowers installed

What happened?

Superpowers 6.0.0 fails to install due to Filename too long errors

Steps to reproduce

1. Either try to update an existing SuperPowers 5.1.0 install -or-
2. Uninstall Superpowers and attempt to reinstall via Plugins > Marketplaces > superpowers-marketplace

Expected behavior

Superpowers 6.0.0 installs cleanly

Actual behavior

I get a fatal: Unable to checkout '70a245c36c02587d2282591b48973db68940ada3' in submodule path 'evals' error

Debug log or conversation transcript

   Plugin Details

   superpowers
   Version: 6.0.0

   Core skills library: TDD, debugging, collaboration patterns, and proven techniques

   Will install:
   · Component summary not available for remote plugin

   ⚠ Make sure you trust a plugin before installing, updating, or using it. Anthropic does not control what MCP servers, files, or other software are included in plugins and cannot verify that they will work as intended or that they won't change. See each plugin's homepage for more information.

   Failed to install: Failed to clone repository: Cloning into 'C:\Users\Administrator\.claude\plugins\cache\temp_git_1781642335649_px9rbx'...
   Submodule 'evals' (git@github.com:prime-radiant-inc/superpowers-evals.git) registered for path 'evals'
   Cloning into 'C:/Users/Administrator/.claude/plugins/cache/temp_git_1781642335649_px9rbx/evals'...
   error: unable to create file results/triggering-test-driven-development-antigravity-20260601T232434Z-d1ec/coding-agent-config/.gemini/antigravity-cli/scratch/docs/superpowers/plans/2026-06-01-email-validation.md: Filename too long
   error: unable to create file results/triggering-test-driven-development-antigravity-20260601T232434Z-d1ec/coding-agent-config/.gemini/antigravity-cli/scratch/docs/superpowers/specs/2026-06-01-email-validation-design.md: Filename too long
   fatal: Unable to checkout '70a245c36c02587d2282591b48973db68940ada3' in submodule path 'evals'

   > Install for you (user scope)

I've tried each of the "Install for ..." options, all with the same result.

Other context:

• I'm logged into the instance as the Administrator user
• it's a Windows Server 2022 EC2 instance, with an EBS volume mounted as C:
• 5.1.0 installed/worked perfectly

[obra]

Yep. This looks like an issue with our evals submodule. Thanks for letting us know. Sorry I was offline for the afternoon

[obra]

Fixed in v6.0.2 (just released): we no longer ship the evals submodule, so the over-long results/ paths that tripped Windows' MAX_PATH are no longer part of the plugin.

Update from superpowers-marketplace (now serving 6.0.2) and the install should complete on Windows. Thanks for the report — the Windows-specific detail was helpful.