plugin.json validation fails: "hooks" and "agents" string paths rejected by current Claude Code schema

[vbutardo]

Problem

Installing matsengrp-agents from the marketplace produces this error in claude /doctor:

Plugin matsengrp-agents has an invalid manifest file at .claude-plugin/plugin.json.
Validation errors: hooks: Invalid input, agents: Invalid input

Cause

.claude-plugin/plugin.json declares:

"agents": "agents/",
"hooks": "hooks/hooks.json"

The current Claude Code plugin schema rejects strings for these keys:

• agents expects an array of agent objects (or omitted, in which case agents/ is auto-discovered).
• hooks expects an inline hooks-config object (or omitted, in which case hooks/hooks.json is auto-discovered).

Analogous to commit 960560a ("Fix marketplace.json source path format"), which corrected a similar schema mismatch.

Suggested fix

Drop both fields — the agents/ directory and hooks/hooks.json already sit at the standard auto-discovery paths, so all 12 agents plus the Notification/Stop hooks continue to load.

   "keywords": [
     "scientific-writing",
     ...
     "bioinformatics"
-  ],
-  "agents": "agents/",
-  "hooks": "hooks/hooks.json"
+  ]
 }

Verified locally

After applying this diff to my local clone:

• claude /doctor passes.
• All 12 agents (scientific-tex-editor, snakemake-pipeline-expert, etc.) still load.
• Both Notification and Stop hooks still fire.

Environment

• Claude Code: latest
• Plugin commit: f6cd4d1

Happy to send a PR — will follow up shortly.

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Reported by Vito Butardo (vbutardo), Swinburne University of Technology.