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202_arch-fix-main-split.md

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id 202
title Split cmd/mdsmith/main.go into per-subcommand files
status ✅
summary main.go is 1 306 lines with six handlers over 50 lines. Move each oversized handler to its own per-subcommand file, following the pattern used by kinds.go, metrics.go, and backlinks.go.
model
depends-on

Split cmd/mdsmith/main.go into per-subcommand files

Goal

cmd/mdsmith/main.go is 1 306 lines. Six handlers exceed ~50 lines: runHelp (81), runFix (71), fixDiscovered (68), runCheck (62), checkStdin (61), run (57). The per-subcommand file pattern is already used by kinds.go, metrics.go, backlinks.go, and mergedriver.go.

Tasks

  1. Create cmd/mdsmith/check.go; move runCheck, checkStdin, and helpers.
  2. Create cmd/mdsmith/fix.go; move runFix, fixDiscovered, and helpers.
  3. Create cmd/mdsmith/help.go; move runHelp and helpers.
  4. Remove the moved functions from main.go; verify it drops below 700 lines.
  5. Run go build ./... and go test ./....

Acceptance Criteria

  • cmd/mdsmith/main.go is under 700 lines.
  • No handler body exceeds ~50 lines.
  • check.go, fix.go, help.go exist under cmd/mdsmith/.
  • go build ./... clean.
  • go test ./... passes.
  • go tool golangci-lint run clean.