fx rethinks coding agents for embeddability

fx’s strongest idea is treating the coding agent as portable infrastructure instead of another heavyweight terminal IDE.

• –The 7.8 MiB native binary and model-agnostic architecture make deployment unusually flexible.
• –WebAssembly support enables JavaScript hosts, editors, and custom products to embed the agent core or terminal.
• –Unix-style commands and `fx ask` fit scripting and automation better than interaction-heavy agent UIs.
• –Permission rules, MCP, skills, and subagents provide extensibility, though the project’s experimental status limits production readiness.
• –Zig’s performance and cross-compilation story are compelling, but the ecosystem and WASM SDK still need maturity.