Context

Config schemas for gutted systems (memory, web search/fetch, Pi orchestrator) still exist, consuming compile-time complexity. Found during MBP deep dive audit of src/config/.

Scope

Remove dead schemas, types, help text, and labels for:

Memory system (~534 lines):

• MemorySchema (78 lines in zod-schema.ts)
• MemorySearchSchema (136 lines in zod-schema.agent-runtime.ts)
• MemorySearchConfig type (115 lines in types.tools.ts)
• memorySearch field refs in AgentDefaultsSchema and AgentEntrySchema
• Memory help text entries (~197 lines in schema.help.ts)
• Memory label entries (~69 lines in schema.labels.ts)

Web search/fetch (~225 lines):

• ToolsWebSearchSchema (52 lines) + ToolsWebFetchSchema (12 lines) + parent
• Web types (82 lines in types.tools.ts)
• Web help text (~42 lines) and labels (~30 lines)

Pi/plugin remnants (~16 lines):

• embeddedPi schema (8 lines) + help (4 lines)
• plugins.slots.memory + plugins.slots.contextEngine (4 lines)

Important: Preserve z.unknown().optional() stubs for any config fields that existing user configs might contain, to avoid breaking config validation on upgrade. This was the approach used by WI-121.

Acceptance Criteria

• MemorySchema, MemorySearchSchema removed (only stubs remain)
• ToolsWebSearchSchema, ToolsWebFetchSchema removed (only stubs remain)
• Corresponding type definitions, help text, and labels removed
• Config validation still accepts existing configs with memory/web sections (stub compat)
• Build passes
• Tests pass

Size

~990 lines removed.