Create a default post for a Jekyll instance using Python, save it and open it in BBEdit.

python-create-jekyll-post.py

import os
from datetime import datetime
import time
import slugify

#Generate timestamps for post id and date.
ts = time.time()
timeid = datetime.fromtimestamp(ts).strftime('%Y-%m-%d')
timestamp = datetime.fromtimestamp(ts).strftime('%Y-%m-%d %H:%M:%S')

title = raw_input("What's the title of this post? ")

#Generate the post id based on Jekyll's requirements.
postid = timeid+'-'+slugify.slugify(title)+'.md'

#Generate post meta. I've included custom image and caption tags.
contents = """---
layout: post
title:  """+title+"""
date:   """+timestamp+"""
categories: uncategorized
tags:
- random
image: /img/image.jpg
caption: This is a picture
---
"""

app_path = '/path/to/your/app/_posts/'
post = app_path+postid

#Create the post.
file = open(post,'w')
file.write(contents)
file.close()
#Change 'bbedit' to your text editor of choice.
os.system('bbedit '+post)

print 'file added.'