Fix: direct download link for ChatGPT, no trailing text after prompt

- README: ChatGPT download link now points directly to the .skill file
  asset instead of the releases page (one-click download)
- SKILL.md: Added explicit rule that nothing may appear after the
  code block — the revised prompt must be the final element
- Updated example interaction to follow the no-trailing-text rule

Author: ckelsoe

README.md

@@ -568,7 +568,7 @@ Detects all installed AI agents and lets you choose where to install.
 
 ChatGPT natively supports [Agent Skills](https://agentskills.io). Available on Business, Enterprise, Edu, Teachers, and Healthcare plans.
 
-1. Download [`prompt-architect.skill`](https://github.com/ckelsoe/prompt-architect/releases/latest) from GitHub Releases
+1. Download [`prompt-architect.skill`](https://github.com/ckelsoe/prompt-architect/releases/latest/download/prompt-architect.skill) (direct download, always latest version)
 2. In ChatGPT, click your profile icon → **Skills**
 3. Click **New skill** → **Upload from your computer**
 4. Upload the `.skill` file

prompt-architect.skill

@@ -182,6 +182,7 @@ Structure your output in this exact order:
 - **No indentation** beyond what the prompt itself genuinely requires
 - **No markdown formatting** inside the block unless the prompt explicitly needs it (e.g., it asks for tables)
 - The user must be able to copy the entire block contents and paste it verbatim with zero editing
+- **Nothing after the code block** — the revised prompt must be the absolute last element in the response. No trailing suggestions, tips, or follow-up text after the closing backticks.
 
 ### 6. Iterate
 
@@ -328,8 +329,6 @@ Follow these rules:
 - Length: same or shorter than the original. Cut fluff, don't add it.
 ```
 
-Does this match what you need, or should we adjust the tone target or constraints?
-
 ---
 
 ## Usage Notes