chore: enable prealloc linter

Amolith created 3 weeks ago

- Enable prealloc linter in golangci config
- Preallocate slice capacity in Goals completion function

Assisted-by: Claude Opus 4.5 via Amp

Change summary

.golangci.yaml                    | 1 +
internal/completion/completion.go | 7 ++++++-
2 files changed, 7 insertions(+), 1 deletion(-)

Detailed changes

.golangci.yaml

@@ -114,6 +114,7 @@ linters:
     - wrapcheck
     - wsl_v5
     - zerologlint
+    - prealloc
 
   disable:
     - depguard

internal/completion/completion.go

@@ -32,7 +32,12 @@ func Goals(_ *cobra.Command, _ []string, _ string) ([]string, cobra.ShellCompDir
 		return nil, cobra.ShellCompDirectiveError
 	}
 
-	var keys []string
+	totalGoals := 0
+	for _, a := range cfg.Areas {
+		totalGoals += len(a.Goals)
+	}
+
+	keys := make([]string, 0, totalGoals)
 
 	for _, a := range cfg.Areas {
 		for _, g := range a.Goals {