docs(documentation): add bold anti-slop and punctuation requirements

- Explicitly call out no AI slop in documentation rules
- Add bold hard requirements to documentation skill

Author: d-padmanabhan

rules/810-documentation.mdc

@@ -234,6 +234,10 @@ docs/
 - Define technical terms
 - Use examples liberally
 
+### Anti-Slop (Required)
+
+**No AI slop.** Keep documentation concise, specific, and grounded. Prefer deleting filler over adding more text.
+
 ### Voice (Avoid "you/your")
 
 Prefer **neutral** or **imperative** phrasing over second-person voice.

skills/documentation-standards/SKILL.md

@@ -12,6 +12,11 @@ description: Documentation best practices including Markdown formatting, Mermaid
 3. **Show, Don't Just Tell**: Use examples and diagrams
 4. **Consistent Format**: Follow established patterns
 
+## Hard Requirements (Writing)
+
+- **No AI slop** - remove filler, keep docs concrete and task-oriented
+- **No em dashes/en dashes** - use hyphens (`-`) instead
+
 ## Voice
 
 Prefer neutral/imperative phrasing - avoid "you/your" in professional docs.