[Bug] Schema validation error when adding plugin marketplace

Bug Description
Bug Report
Title: Cannot add marketplace - Schema validation errors on v2.1.263

Description:
I'm unable to add any plugin marketplace (official or community) due to schema validation errors.

Version: 2.1.263 (confirmed latest via claude upgrade)

Steps to reproduce:

1. Run /plugin marketplace add anthropics/claude-plugins-official
2. Get schema validation errors

Error details:

• Hundreds of "plugins.X.source: Invalid input" errors
• Multiple "Unrecognized key: displayName" errors
• Affects both official marketplace and community marketplace
• Both HTTPS URL and shorthand syntax fail with same errors

Example errors:
plugins.0.source: Invalid input
plugins.76: Unrecognized key: "displayName"
plugins.127: Unrecognized key: "displayName"
(and hundreds more...)

Expected behavior:
Marketplace should add successfully and allow browsing/installing plugins

Actual behavior:
Schema validation fails, marketplace is not added

Additional context:

• macOS (Darwin 21.6.0)
• Reinstalled Claude CLI via curl installer - still same issue
• Marketplace directory remains empty: ~/.claude/plugins/marketplaces/

Environment Info

• Platform: darwin
• Terminal: iTerm.app
• Version: 2.1.23
• Feedback ID: 5d05ea2f-20db-4c29-ad56-44a6d82cdfe0

Errors

[{"error":"Error: ENOENT: no such file or directory, scandir '/Library/Application Support/ClaudeCode/.claude/skills'\n    at readdirSync (unknown)\n    at <anonymous> (/$bunfs/root/claude:12:2063)\n    at n2 (/$bunfs/root/claude:11:35715)\n    at readdirSync (/$bunfs/root/claude:12:2024)\n    at uVA (/$bunfs/root/claude:1783:380)\n    at uVA (/$bunfs/root/claude:1783:1350)\n    at <anonymous> (/$bunfs/root/claude:1783:4670)\n    at <anonymous> (/$bunfs/root/claude:1783:5401)\n    at L (/$bunfs/root/claude:11:7259)\n    at Lx9 (/$bunfs/root/claude:4793:4342)","timestamp":"2026-09-06T07:46:26.988Z"},{"error":"Error: ENOENT: no such file or directory, scandir '/Users/anishpk/.claude/skills'\n    at readdirSync (unknown)\n    at <anonymous> (/$bunfs/root/claude:12:2063)\n    at n2 (/$bunfs/root/claude:11:35715)\n    at readdirSync (/$bunfs/root/claude:12:2024)\n    at uVA (/$bunfs/root/claude:1783:380)\n    at uVA (/$bunfs/root/claude:1783:1350)\n    at <anonymous> (/$bunfs/root/claude:1783:4713)\n    at <anonymous> (/$bunfs/root/claude:1783:5401)\n    at L (/$bunfs/root/claude:11:7259)\n    at Lx9 (/$bunfs/root/claude:4793:4342)","timestamp":"2026-09-06T07:46:26.988Z"},{"error":"AbortError: The operation was aborted.\n    at unknown\n    at abortChildProcess (node:child_process:935:42)\n    at onAbortListener2 (node:child_process:35:24)\n    at abort (unknown)\n    at <anonymous> (/$bunfs/root/claude:6279:13481)","timestamp":"2026-09-06T07:46:34.899Z"},{"error":"RipgrepTimeoutError: Ripgrep search timed out after 20 seconds. The search may have matched files but did not complete in time. Try searching a more specific path or pattern.\n    at $ (/$bunfs/root/claude:74:189)\n    at <anonymous> (/$bunfs/root/claude:74:403)\n    at exitHandler (node:child_process:109:27)\n    at errorHandler (node:child_process:118:16)\n    at emitError (node:events:43:23)\n    at abortChildProcess (node:child_process:935:17)\n    at onAbortListener2 (node:child_process:35:24)\n    at abort (unknown)\n    at <anonymous> (/$bunfs/root/claude:6279:13481)","timestamp":"2026-09-06T07:46:34.899Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"Your credit balance is too low to access the Anthropic API. Please go to Plans & Billing to upgrade or purchase credits.\"},\"request_id\":\"req_011CempErkLaVQXGS8UAWd9Z\"}\n    at generate (/$bunfs/root/claude:145:37655)\n    at makeRequest (/$bunfs/root/claude:162:5435)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-09-06T07:46:34.948Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"Your credit balance is too low to access the Anthropic API. Please go to Plans & Billing to upgrade or purchase credits.\"},\"request_id\":\"req_011CempEtH7xAhQbj8DoWTcX\"}\n    at generate (/$bunfs/root/claude:145:37655)\n    at makeRequest (/$bunfs/root/claude:162:5435)\n    at processTicksAndRejections (native:7:39)","timestamp":"2026-09-06T07:46:35.321Z"},{"error":"Error: 400 {\"type\":\"error\",\"error\":{\"type\":\"invalid_request_error\",\"message\":\"Your credit balance is too low to access the Anthropic API. Please go to Plans & Billing to upgrade or purchase credits.\"},\"request_id\":\"req_011CempEv32ihJLJHzauQCYT\"}\n    at generate (/$bunfs/root/cl…

Note: Content was truncated.