Address PR review: fix skill file inclusion and README install

- Replace broken shell expansion (`$(dirname "$0")`) in SKILL.md with
  explicit Read instructions for reference files. The previous approach
  silently failed because $0 resolves to the shell binary, not the
  skill file path.
- Remove misleading skills cp block from Quick Install in README.
  Skills require --add-dir registration, not a file copy to
  ~/.claude/skills/.

Closes review threads on PR #17. ShakaCode-specific content tracked
in #19 and #20 for follow-up in project repos.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: justin808

README.md

@@ -19,10 +19,6 @@ cp commands/*.md ~/.claude/commands/
 mkdir -p ~/.claude/agents
 cp agents/*.md ~/.claude/agents/
 
-# Install all skills
-mkdir -p ~/.claude/skills
-cp -r skills/* ~/.claude/skills/
-
 # Or install specific ones
 cp commands/self-review.md ~/.claude/commands/
 cp commands/merge-commit-msg.md ~/.claude/commands/

skills/docs/SKILL.md

@@ -7,17 +7,13 @@ description: Generate, audit, or update project documentation to a professional
 
 Generate and maintain documentation that meets or exceeds the standard set by the best open-source Rails/JS projects (Inertia Rails, Vite Ruby, Rails itself).
 
-## Reference: Quality Standard
+## Before You Start
 
-!`cat "$(dirname "$0")/references/quality-standard.md"`
+Read these reference files (located in the `references/` subdirectory next to this SKILL.md file) before proceeding:
 
-## Reference: Documentation Templates
-
-!`cat "$(dirname "$0")/references/templates.md"`
-
-## Reference: Competitive Landscape
-
-!`cat "$(dirname "$0")/references/competitive-landscape.md"`
+1. **Quality Standard** — `references/quality-standard.md` — tiered audit checklist (Must-Have / Expected / Differentiator)
+2. **Documentation Templates** — `references/templates.md` — structural skeletons for each doc type
+3. **Competitive Landscape** — `references/competitive-landscape.md` — benchmarks against peer projects
 
 ## Workflow