MCP-DFT-002: MCP server does not reload on filesystem changes

[danieleades]

Observation

The MCP server loads the requirements directory once at startup and never reloads it when files or config change.

Evidence

• req-mcp/src/state.rs wraps a Directory loaded only in ServerState::new.
• req-mcp/src/main.rs initializes state once and never watches or refreshes it.

Impact

Active MCP sessions return stale data after edits, additions, deletions, or config changes, violating MCP-SYS-005 and risking incorrect guidance to agents.

Expected

Detect filesystem changes (requirements and .req/config.toml) and reload the directory so MCP tool calls always reflect current repository state without requiring a server restart.

Related Requirements

• Parents: MCP-SYS-005
• Tags: P2

Tracked in: MCP-DFT-002