fix(cli): reject unrecognized flags instead of treating them as issue ids (#2)

app/lib/linear_cli/cli.ex

@@ -93,9 +93,37 @@ defmodule LinearCli.CLI do
   end
 
   defp run(fun, result, halt) do
-    case fun.(result) do
-      :ok -> :ok
-      {:error, error} -> handle_error(error, result.options[:debug], halt)
+    case reject_unknown_flags(result.unknown) do
+      :ok ->
+        case fun.(result) do
+          :ok -> :ok
+          {:error, error} -> handle_error(error, result.options[:debug], halt)
+        end
+
+      {:error, error} ->
+        handle_error(error, result.options[:debug], halt)
+    end
+  end
+
+  # `issue list`/`take`/`update` all set `allow_unknown_args: true` so bare
+  # tokens (e.g. `CRY-1`) can be captured as issue ids via `result.unknown`
+  # rather than a declared positional arg (Optimus has no `type: :array`
+  # equivalent - see their subcommand specs below). That same bucket also
+  # silently swallows any *unrecognized flag* (e.g. a typo, or a real flag
+  # this subcommand just doesn't have, like `--mine` on `issue list` - #2),
+  # which then gets treated as an issue id to look up instead of erroring
+  # clearly. Every other subcommand has `allow_unknown_args: false` (the
+  # default), where Optimus itself already rejects unknown args before we
+  # ever see a parse_result - so `result.unknown` is only ever non-empty here
+  # for those three subcommands, and only ever contains genuine bare ids
+  # once this filters out anything flag-shaped.
+  defp reject_unknown_flags(unknown_tokens) do
+    case Enum.filter(unknown_tokens, &String.starts_with?(&1, "-")) do
+      [] ->
+        :ok
+
+      bad_flags ->
+        {:error, {:smells_bad, "unrecognized option(s): #{Enum.join(bad_flags, ", ")}"}}
     end
   end
 

app/test/linear_cli/cli_test.exs

@@ -131,6 +131,27 @@ defmodule LinearCli.CLITest do
     refute output =~ "CRY-1"
   end
 
+  test "issue list --mine gives a clear error instead of being treated as an issue id (#2)" do
+    # `--mine` isn't (and won't be - `--no-mine` already covers it, `--mine`
+    # is the implied default) a declared flag on `issue list`. Since this
+    # subcommand allows unknown args (for bare issue ids), an unrecognized
+    # `-`-prefixed token used to silently fall into that same bucket and get
+    # looked up as a literal issue id "--mine" instead of erroring - crashing
+    # with a raw %Ash.Error.Unknown{} dump. No Req.Test stub needed: the fix
+    # rejects this before any API call happens.
+    test_pid = self()
+    halt = fn code -> send(test_pid, {:halted, code}) end
+
+    output =
+      capture_io(:stderr, fn ->
+        LinearCli.CLI.main(["issue", "list", "--mine"], halt)
+      end)
+
+    assert_received {:halted, 22}
+    assert output =~ "unrecognized option(s): --mine"
+    assert output =~ "This smells bad! Bailing."
+  end
+
   test "an unknown issue id halts with exit code 66" do
     test_pid = self()
     halt = fn code -> send(test_pid, {:halted, code}) end