[riverma]

Summary

• Follow-up to Fix install command URL for GitHub Enterprise Server deployments #2 (merged), which fixed getRepositoryInfo()'s fallback branch to derive the correct host URL instead of hardcoding github.com.
• That fix alone wasn't sufficient for GitHub Enterprise Server deployments behind SSO: /plugin marketplace add <url> first tries the bare URL as a hosted marketplace.json source. On github.com, an unauthenticated fetch of a private/internal repo URL 404s, so Claude Code falls back to git clone-ing it. On a GHE instance behind SSO, the same fetch can return HTTP 200 with the SSO login page's HTML instead of a 404 — so Claude Code never falls back, and instead tries to parse that HTML as the marketplace.json object, failing with Invalid input: expected object, received string.
• Appending .git to the URL makes it unambiguously a git source, so Claude Code skips the JSON-fetch attempt and clones directly.

Found while deploying a GHE-hosted fork of this framework: /plugin marketplace add failed with exactly the error above until this fix was applied.

Test plan

• npm run build succeeds with no errors
• Reproduced the exact error against a real GitHub Enterprise Server deployment with the un-suffixed URL
• Confirmed /plugin marketplace add <url>.git succeeds against the same deployment once the suffix is added
• Verified the change doesn't affect the live nasa-ammos.github.io/slim deployment — tested /plugin marketplace add against nasa-ammos/slim both with and without the .git suffix; both succeed identically on github.com

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Model: Claude Sonnet 5

[riverma]

Does this patch break existing deployments, e.g. nasa-ammos.github.com/slim? Need to verify and prove it does not.

[riverma]

The change only affects what command the website's "Claude Code" install tab displays to a user (adding .git to the end of the githubUrl string in getMarketplaceCommand()). It touches nothing in getRepositoryInfo() and doesn't change how nasa-ammos.github.io/slim is built or served.

Tested both forms directly against the live nasa-ammos/slim repo on github.com with Claude Code:

• /plugin marketplace add nasa-ammos/slim (current displayed command, shorthand form) — succeeds
• /plugin marketplace add https://github.com/nasa-ammos/slim.git (what the website will display after this PR) — also succeeds, identical result

Both add the marketplace cleanly and install/use its plugins without issue. The .git suffix is a no-op for github.com (which already falls back to git-clone correctly without it) — it's only load-bearing for GitHub Enterprise Server deployments behind SSO, where the unsuffixed form fails as described in the PR body. Since nasa-ammos.github.io/slim is github.com-hosted, it's unaffected either way.