fix: route ccusage codex --json through parse_codex correctly

is_codex_shape only checked snake_case keys; ccusage codex --json emits
camelCase (cachedInputTokens, reasoningOutputTokens). Detection missed,
data fell through to parse_ccusage: no 2:1 split, no cache, raw combined
input inflated. Now checks both cases. Also scopes ./sigrank default to
ccusage claude --json so Claude and Codex are never combined.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

ingest.py

@@ -50,7 +50,8 @@ def is_codex_shape(d):
         elif isinstance(o, list):
             for v in o: scan(v)
     scan(d)
-    return "cached_input_tokens" in keys or "reasoning_output_tokens" in keys
+    return ("cached_input_tokens" in keys or "cachedInputTokens" in keys or
+            "reasoning_output_tokens" in keys or "reasoningOutputTokens" in keys)
 
 def parse_codex(text):
     """

sigrank.py

@@ -64,9 +64,9 @@ def _grab_usage(args):
         return open(args.file, encoding="utf-8").read(), f"file {args.file}"
     if args.stdin:
         return sys.stdin.read(), "stdin"
-    # auto: run ccusage on the user's machine
-    sub = ["codex", "--json"] if args.codex else ["--json"]
-    label = "ccusage codex" if args.codex else "ccusage"
+    # auto: run ccusage on the user's machine — subcommand scopes to one agent only
+    sub = ["codex", "--json"] if args.codex else ["claude", "--json"]
+    label = "ccusage codex" if args.codex else "ccusage claude"
     if shutil.which("ccusage"):
         cmd = ["ccusage"] + sub
     elif shutil.which("npx"):