fix(cmd): resolve type checker nil warnings

Amolith created 4 days ago

Add ---@cast annotations in clone.lua and new.lua where the type checker
couldn't infer that loop-bounded array access returns non-nil.

Add early return after shell.die() in add.lua so type checker knows file
handle is non-nil when close() is called.

Assisted-by: Claude Opus 4.5 via Amp

Change summary

src/wt/cmd/add.lua   | 1 +
src/wt/cmd/clone.lua | 1 +
src/wt/cmd/new.lua   | 1 +
3 files changed, 3 insertions(+)

Detailed changes

src/wt/cmd/add.lua

@@ -77,6 +77,7 @@ function M.cmd_add(args)
 					.. existing_wt.path
 					.. "\nhint: run `git worktree prune` to clean up stale entries"
 			)
+			return
 		end
 		wt_check:close()
 

src/wt/cmd/clone.lua

@@ -26,6 +26,7 @@ function M.cmd_clone(args)
 	local positional = {}
 	while i <= #args do
 		local a = args[i]
+		---@cast a string
 		if a == "--remote" then
 			if not args[i + 1] then
 				shell.die("--remote requires a name")

src/wt/cmd/new.lua

@@ -25,6 +25,7 @@ function M.cmd_new(args)
 	local positional = {}
 	while i <= #args do
 		local a = args[i]
+		---@cast a string
 		if a == "--remote" then
 			if not args[i + 1] then
 				shell.die("--remote requires a name")