diff --git a/SKILL.md b/SKILL.md
index 90ab1a1..166d75c 100644
--- a/SKILL.md
+++ b/SKILL.md
@@ -1,7 +1,7 @@
 ---
 name: last30days
 description: Research a topic from the last 30 days on Reddit + X + Web, become an expert, and write copy-paste-ready prompts for the user's target tool.
-argument-hint: '"[topic] for [tool]" or "[topic]"'
+argument-hint: '"[topic]" or "[topic] --days=7"'
 allowed-tools: Bash, Read, Write, AskUserQuestion, WebSearch
 ---
 
@@ -103,7 +103,8 @@ For ALL query types:
 - INCLUDE: blogs, tutorials, docs, news, GitHub repos
 - **DO NOT output "Sources:" list** - this is noise, we'll show stats at the end
 
-**Depth options** (passed through from user's command):
+**Options** (passed through from user's command):
+- `--days=N` → Look back N days instead of 30 (e.g., `--days=7` for weekly roundup)
 - `--quick` → Faster, fewer sources (8-12 each)
 - (default) → Balanced (20-30 each)
 - `--deep` → Comprehensive (50-70 Reddit, 40-60 X)
diff --git a/scripts/last30days.py b/scripts/last30days.py
index edf8d0d..2066a79 100644
--- a/scripts/last30days.py
+++ b/scripts/last30days.py
@@ -323,8 +323,13 @@ def run_research(
 
 
 def main():
+    # Fix Unicode output on Windows (cp1252 can't encode emoji)
+    if sys.platform == "win32":
+        sys.stdout.reconfigure(encoding="utf-8", errors="replace")
+        sys.stderr.reconfigure(encoding="utf-8", errors="replace")
+
     parser = argparse.ArgumentParser(
-        description="Research a topic from the last 30 days on Reddit + X"
+        description="Research a topic from the last N days on Reddit + X"
     )
     parser.add_argument("topic", nargs="?", help="Topic to research")
     parser.add_argument("--mock", action="store_true", help="Use fixtures")
@@ -360,6 +365,14 @@ def main():
         action="store_true",
         help="Include general web search alongside Reddit/X (lower weighted)",
     )
+    parser.add_argument(
+        "--days",
+        type=int,
+        default=30,
+        choices=range(1, 31),
+        metavar="N",
+        help="Number of days to look back (1-30, default: 30)",
+    )
 
     args = parser.parse_args()
 
@@ -425,7 +438,7 @@ def main():
                 sys.exit(1)
 
     # Get date range
-    from_date, to_date = dates.get_date_range(30)
+    from_date, to_date = dates.get_date_range(args.days)
 
     # Check what keys are missing for promo messaging
     missing_keys = env.get_missing_keys(config)
@@ -543,7 +556,7 @@ def main():
         progress.show_complete(len(deduped_reddit), len(deduped_x))
 
     # Output result
-    output_result(report, args.emit, web_needed, args.topic, from_date, to_date, missing_keys)
+    output_result(report, args.emit, web_needed, args.topic, from_date, to_date, missing_keys, args.days)
 
 
 def output_result(
@@ -554,6 +567,7 @@ def output_result(
     from_date: str = "",
     to_date: str = "",
     missing_keys: str = "none",
+    days: int = 30,
 ):
     """Output the result based on emit mode."""
     if emit_mode == "compact":
@@ -577,7 +591,7 @@ def output_result(
         print("")
         print("Claude: Use your WebSearch tool to find 8-15 relevant web pages.")
         print("EXCLUDE: reddit.com, x.com, twitter.com (already covered above)")
-        print("INCLUDE: blogs, docs, news, tutorials from the last 30 days")
+        print(f"INCLUDE: blogs, docs, news, tutorials from the last {days} days")
         print("")
         print("After searching, synthesize WebSearch results WITH the Reddit/X")
         print("results above. WebSearch items should rank LOWER than comparable")
diff --git a/scripts/lib/models.py b/scripts/lib/models.py
index 78399c7..29e1223 100644
--- a/scripts/lib/models.py
+++ b/scripts/lib/models.py
@@ -7,7 +7,7 @@ from . import cache, http
 
 # OpenAI API
 OPENAI_MODELS_URL = "https://api.openai.com/v1/models"
-OPENAI_FALLBACK_MODELS = ["gpt-5.2", "gpt-5.1", "gpt-5", "gpt-4o"]
+OPENAI_FALLBACK_MODELS = ["gpt-5.2", "gpt-5.1", "gpt-5", "gpt-4.1", "gpt-4o"]
 
 # xAI API - Agent Tools API requires grok-4 family
 XAI_MODELS_URL = "https://api.x.ai/v1/models"
@@ -35,8 +35,8 @@ def is_mainline_openai_model(model_id: str) -> bool:
     """Check if model is a mainline GPT model (not mini/nano/chat/codex/pro)."""
     model_lower = model_id.lower()
 
-    # Must be gpt-5 series
-    if not re.match(r'^gpt-5(\.\d+)*$', model_lower):
+    # Must be gpt-4o, gpt-4.1+, or gpt-5+ series (mainline, not mini/nano/etc)
+    if not re.match(r'^gpt-(?:4o|4\.1|5)(\.\d+)*$', model_lower):
         return False
 
     # Exclude variants
diff --git a/scripts/lib/openai_reddit.py b/scripts/lib/openai_reddit.py
index 68da853..8067a30 100644
--- a/scripts/lib/openai_reddit.py
+++ b/scripts/lib/openai_reddit.py
@@ -8,7 +8,7 @@ from typing import Any, Dict, List, Optional
 from . import http
 
 # Fallback models when the selected model isn't accessible (e.g., org not verified for GPT-5)
-MODEL_FALLBACK_ORDER = ["gpt-4o", "gpt-4o-mini"]
+MODEL_FALLBACK_ORDER = ["gpt-4.1", "gpt-4o", "gpt-4o-mini"]
 
 
 def _log_error(msg: str):
@@ -25,7 +25,7 @@ def _log_info(msg: str):
 
 def _is_model_access_error(error: http.HTTPError) -> bool:
     """Check if error is due to model access/verification issues."""
-    if error.status_code != 400:
+    if error.status_code not in (400, 403):
         return False
     if not error.body:
         return False