feat(outcome): add stale sweep branch for batch-resolving quiet applications (#439)

* feat(outcome): add stale sweep branch for batch-resolving quiet applications

- Add /outcome stale [N] and /outcome sweep [N] to Step 0
- Offer stale sweep in Step 1.3 when rows are quiet 60+ days
- Add Step 2c Stale Sweep Branch with interactive all/select/skip confirmation
- Batch-resolve qualifying open applications to canonical no_response
- Update tracker status and append dated notes; update archive outcome.md
- Add Rule 9 to Important Rules
- Add tests/test_outcome_stale.py and update CHANGELOG.md

* test(outcome): drop auxiliary candidate filter from spec test per review

tests/test_outcome_stale.py

@@ -0,0 +1,65 @@
+"""Guards for /outcome's stale sweep branch (Step 2c).
+
+Pins the invariants for batch-resolving quiet applications:
+- Step 0 documents `stale` / `sweep` and `stale <N>` / `sweep <N>`.
+- Step 1.3 offers stale sweep when open rows exceed 60 days quiet.
+- Step 2c defines the Stale Sweep Branch.
+- Drafted applications are strictly excluded (never submitted).
+- The default threshold is 60 days quiet.
+- User confirmation (all, select, skip) is strictly required before writing.
+- Status is resolved to canonical 'no_response' spelling.
+"""
+
+import re
+import unittest
+from pathlib import Path
+
+REPO = Path(__file__).resolve().parent.parent
+COMMAND = REPO / ".claude" / "commands" / "outcome.md"
+
+
+class OutcomeStaleBranchSpecTests(unittest.TestCase):
+    def setUp(self):
+        self.text = COMMAND.read_text(encoding="utf-8")
+
+    def test_stale_argument_documented_in_step0(self):
+        self.assertIn("`stale` or `sweep`", self.text)
+        self.assertIn("`stale <N>` or `sweep <N>`", self.text)
+
+    def test_step1_suggests_stale_sweep(self):
+        self.assertIn("/outcome stale", self.text)
+        self.assertIn("60+ days", self.text)
+
+    def test_step2c_section_exists(self):
+        self.assertIn("## Step 2c: Stale Sweep Branch", self.text)
+
+    def test_drafted_rows_excluded_from_stale_candidates(self):
+        match = re.search(r"## Step 2c: Stale Sweep Branch(.*?)(?=## Step 3:)", self.text, re.DOTALL)
+        self.assertTrue(match, "Step 2c must exist")
+        step2c = match.group(1)
+        self.assertIn("neither final nor `drafted`", step2c)
+        self.assertIn("never submitted and cannot receive a response", step2c)
+
+    def test_default_60_day_threshold(self):
+        match = re.search(r"## Step 2c: Stale Sweep Branch(.*?)(?=## Step 3:)", self.text, re.DOTALL)
+        self.assertTrue(match)
+        step2c = match.group(1)
+        self.assertIn("60 days", step2c)
+
+    def test_user_confirmation_options_required(self):
+        match = re.search(r"## Step 2c: Stale Sweep Branch(.*?)(?=## Step 3:)", self.text, re.DOTALL)
+        self.assertTrue(match)
+        step2c = match.group(1)
+        self.assertIn("`all`", step2c)
+        self.assertIn("`select`", step2c)
+        self.assertIn("`skip`", step2c)
+
+    def test_resolves_to_canonical_no_response(self):
+        match = re.search(r"## Step 2c: Stale Sweep Branch(.*?)(?=## Step 3:)", self.text, re.DOTALL)
+        self.assertTrue(match)
+        step2c = match.group(1)
+        self.assertIn("no_response", step2c)
+
+
+if __name__ == "__main__":
+    unittest.main()