Hub-managed Agent Plugins. Packages under `~/.agents/plugins/*` on the hub host are discovered and validated from their root `plugin.json`; valid skills under `skills/` are exposed through the skills tool as `plugin-name:skill-name`, and stdio, Streamable HTTP, and legacy SSE servers from `mcp.json` are started without touching `cline_mcp_settings.json`. Workspace `.agents/plugins` directories are deliberately not scanned, so opening a repo cannot implicitly start repo-controlled MCP servers; extra roots require an explicit `agentPluginPaths`. Enablement lives in hub settings keyed by manifest name and publishes `settings.changed`, so clients no longer need their own loader or enablement store.

Two bugs fixed along the way: `settings.toggle({type: "skills"})` wrote a `disabled` key into a plugin skill's SKILL.md frontmatter, which the strict Agent Skills parser then rejected so the skill silently vanished until hand-edited; and `InMemoryMcpManager.dispose()` aborted on the first `disconnect()` rejection, leaking every remaining server's process A model turn that dies mid-stream with a transient provider error is now retried up to 3 times with exponential backoff instead of…