The plugin.json manifest contains "strict": false which is not a recognized key by Claude Code's plugin validator.

[moisesrodriguez]

When trying to install the plugin I get the error Error: Failed to install: Plugin has an invalid manifest file at /Users/moises/.claude/plugins/cache/temp_local_1775155146920_op76ub/.claude-plugin/plugin.json. Validation errors: : Unrecognized key: "strict"

Asking claude the issue is the plugin.json manifest contains "strict": false which is not a recognized key by Claude Code's plugin validator.

I edited the file and the plugin installed correctly

[Callumpy]

Hit the same issue. The "strict": false key was added in commit 55c1d9e ("auto-discover hooks") on March 24. Claude Code's plugin manifest validator doesn't recognise it as a valid key.

The fix is removing the "strict": false line from plugins/warp/.claude-plugin/plugin.json.

[luckb0x]

+1, and same I just removed and it worked.

[zachbai]

Thanks for the report!

@harryalbert mind taking a look

[harryalbert]

can do! @moisesrodriguez this should be fixed if you update your claude code to the newest version, but I can also remove the strict flag so that the plugin is compatible with older claude code versions

[harryalbert]

Just merged a fix! Will close this issue now that it's resolved