2026.5.63

Update Claude Code docs - 2026-05-19 | Release: 2026.5.63 | Updated: agent-sdk__agent-loop.md,agent-sdk__python.md agent-sdk__sessions.md,agent-sdk__todo-tracking.md agent-sdk__typescript-v2-preview.md,agent-sdk__typescript.md agent-view.md,changelog.md cli-reference.md,discover-plugins.md env-vars.md,errors.md fast-mode.md,hooks-guide.md hooks.md,mcp.md model-config.md,permission-modes.md plugin-dependencies.md,plugin-marketplaces.md plugins-reference.md,settings.md sub-agents.md,tools-reference.md