chore: release v4.0.0 - sync 550+ skills and restructure docs

skills/conductor-validator/SKILL.md

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+---
+name: conductor-validator
+description: Validates Conductor project artifacts for completeness,
+  consistency, and correctness. Use after setup, when diagnosing issues, or
+  before implementation to verify project context.
+allowed-tools: Read Glob Grep Bash
+metadata:
+  model: opus
+  color: cyan
+---
+
+# Check if conductor directory exists
+ls -la conductor/
+
+# Find all track directories
+ls -la conductor/tracks/
+
+# Check for required files
+ls conductor/index.md conductor/product.md conductor/tech-stack.md conductor/workflow.md conductor/tracks.md
+```
+
+## Use this skill when
+
+- Working on check if conductor directory exists tasks or workflows
+- Needing guidance, best practices, or checklists for check if conductor directory exists
+
+## Do not use this skill when
+
+- The task is unrelated to check if conductor directory exists
+- You need a different domain or tool outside this scope
+
+## Instructions
+
+- Clarify goals, constraints, and required inputs.
+- Apply relevant best practices and validate outcomes.
+- Provide actionable steps and verification.
+- If detailed examples are required, open `resources/implementation-playbook.md`.
+
+## Pattern Matching
+
+**Status markers in tracks.md:**
+
+```
+- [ ] Track Name  # Not started
+- [~] Track Name  # In progress
+- [x] Track Name  # Complete
+```
+
+**Task markers in plan.md:**
+
+```
+- [ ] Task description  # Pending
+- [~] Task description  # In progress
+- [x] Task description  # Complete
+```
+
+**Track ID pattern:**
+
+```
+<type>_<name>_<YYYYMMDD>
+Example: feature_user_auth_20250115
+```