setup.zsh sources 8 deprecated scripts silently — users see no warning that deprecated code is running

[ooloth]

Current state

features/setup/setup.zsh sources eight files from the deprecated/ subdirectory (lines 111, 113–118, and 120: deprecated/homebrew.zsh, deprecated/rust.zsh, deprecated/uv.zsh, deprecated/node.zsh, deprecated/npm.zsh, deprecated/tmux.zsh, deprecated/neovim.zsh, deprecated/symlinks.zsh). None of these sourced steps carry any indication in the terminal output that they are executing deprecated code. A user who runs setup has no way to know that a significant portion of the installation is running older, potentially outdated scripts that the repo has marked for replacement.

The second ideal-state option below is blocked by a gap that isn't visible from reading setup.zsh: nothing calls features/install/tools.bash. It exists and auto-discovers every tools/*/install.bash by find, but setup.zsh never invokes it, so on a fresh machine no tool's install.bash runs at all — the deprecated zsh scripts are the only install path that executes. Replacing the deprecated sources therefore means wiring features/install/tools.bash into setup.zsh, not just deleting source lines. Any future tool that manages its own installation — for example one that clones a second repo — will silently not install on a new laptop until that wiring exists.

Ideal state

• When setup.zsh runs a step sourced from deprecated/, the terminal output includes a visible indicator (e.g. a ⚠️ [deprecated] prefix line) so the user knows that step is running legacy code.
• Alternatively, all deprecated steps are replaced with their non-deprecated equivalents and the source "${DOTINSTALL}/deprecated/*.zsh" calls are removed entirely. Taking this path also means setup.zsh calls features/install/tools.bash, so that every tool's install.bash runs on a fresh machine.

Out of scope

• Rewriting the deprecated scripts themselves (that is separate work).
• Changes to what the deprecated scripts do.

Starting points

• features/setup/setup.zsh lines 109–121: the full block of source "${DOTINSTALL}/..." calls, deprecated and current interleaved
• features/install/tools.bash — the auto-discovering installer that nothing currently calls
• features/update/tools.bash — the equivalent for updates, which is wired up and shows the pattern to follow

QA plan

1. Run features/setup/setup.zsh (or review its echo/printf output by inspection).
2. For each step sourced from deprecated/, expect a clearly labelled terminal line such as ⚠️ [deprecated] Running homebrew.zsh — replace with features/install/....
3. Confirm no step from deprecated/ runs without this label appearing in the output.
4. Grep setup.zsh for features/install/tools.bash — expect either a call to it, or a labelled deprecation warning on every step that would otherwise have been its responsibility.

Done when

A user running setup can identify from the terminal output which installation steps are sourced from deprecated scripts, without inspecting the setup.zsh source.