Drop orphaned command_from_stdin helper

The code-review suggestions rewired run() to read the payload directly
via payload_from_stdin/command_of/cwd_of, leaving command_from_stdin
used only by its own test and its docstring describing a run() path that
no longer exists. Remove it and repoint the bad-input test at
payload_from_stdin, the robustness boundary both run() and the
dispatcher actually use.

Relates to #27

Author: jeffhorn-nava

scripts/hooks/__init__.py

@@ -30,11 +30,6 @@ def cwd_of(payload):
     return payload.get("cwd") or None
 
 
-def command_from_stdin():
-    """The Bash command string from the payload on stdin, or '' (single-check `run` path)."""
-    return command_of(payload_from_stdin())
-
-
 def matches(command, *words):
     """True if `command` runs `words` as a whitespace-separated token sequence.
 

tests/test_hook_reminders.py

@@ -1,7 +1,7 @@
 import io
 import json
 
-from scripts.hooks import command_from_stdin, matches, run
+from scripts.hooks import matches, payload_from_stdin, run
 from scripts.hooks import __main__ as dispatcher
 from scripts.hooks import git_commit, issue_create, pr_create
 
@@ -48,9 +48,9 @@ def test_git_commit_threads_cwd_into_git(monkeypatch):
     assert seen == ["/repo/sub", "/repo/sub", "/repo/sub"]
 
 
-def test_command_from_stdin_handles_bad_input(monkeypatch):
+def test_payload_from_stdin_handles_bad_input(monkeypatch):
     monkeypatch.setattr("sys.stdin", io.StringIO("not json"))
-    assert command_from_stdin() == ""
+    assert payload_from_stdin() == {}
 
 
 def test_run_emits_valid_hook_json(monkeypatch):