Commit A fixes a real CI/toolchain conflict that was breaking musl builds, a concrete infrastructure bugfix with lasting impact on build reliability. Commit B is a minor API simplification removing an unused field, which is reasonable cleanup but smaller in scope and impact than resolving a broken CI pipeline.
B permanently simplifies the wire protocol, types, and CLI by excising the agents_bound field and its binding-count computation from WhoamiResponse, yielding a cleaner identity contract. A merely deletes a 3-line rust-toolchain.toml pin to dodge a CI override, which is useful tooling hygiene but does not alter project behavior or design.
Side B makes a coherent API change by removing the `agents_bound` field from the shared `WhoamiResponse` type, the server response, and the CLI output, simplifying the wire protocol and eliminating now-unneeded computation. Side A only deletes the `rust-toolchain.toml` pin to avoid toolchain conflicts, which is useful for development and CI configuration but is a narrower infrastructure change.