Golang Uber Fx Skill Security Audit

`Bash(go:*)` covers the full Go command surface, not only inspection or compilation. In a repository containing tests, generators, or runnable programs, an authorized agent could execute repository or toolchain code. The documented `go get` gives Go access a legitimate purpose, but the permission is not narrowed and no pre-execution review is required. Nothing here proves execution; users can restrict access to specific reviewed Go commands.

This is an instructional example, not the Skill itself reading or exfiltrating credentials. It explicitly reads `API_KEY` from the environment and supplies it as a named string in the top-level Fx graph. If adopted, any component in that graph that knows the `apikey` name can request it; the example shows no scope restriction or logging safeguard. Impact depends on component trust. Users can ask for a narrow credential type or direct injection only into the API-client constructor.

The installation snippet recommends `go get go.uber.org/fx` without a version. When run in a module, it normally resolves a version over the network and updates dependency files, so the result can vary with time and existing module state. This is normal Go dependency installation, not concealed behavior, but it creates reproducibility and file-change risk. Users can request a pinned version and review go.mod/go.sum changes before accepting them.

The Skill declares access to every `git` subcommand, although its stated purpose is Go/Fx architecture guidance and the body does not restrict Git to read-only inspection. If the host enforces this declaration, agent-generated commands could alter branches, the worktree, or remote history; the source does not show that this happened. Users can ask the author to remove Git access or allow only named read-only subcommands.

The example logger immediately returns for Provided, Supplied, and Decorated events and explicitly recommends this filtering in production. If a user relies on Fx events to trace dependency registration or decoration changes, this reduces later audit visibility. It does not delete application data, and lifecycle events and errors remain logged, so the impact is limited to observability. Users can request retaining these events, lowering their level, or routing them to a restricted audit sink.