chore: upgrade BMAD framework to skill-based architecture

Migrates from slash-command files (.claude/commands, .cursor/commands)
to the new skill-based architecture with workflow step files.

_bmad/bmb/workflows/agent/steps-v/v-02d-validate-structure.md

@@ -1,134 +0,0 @@
----
-name: 'v-02d-validate-structure'
-description: 'Validate YAML structure and append to report'
-
-nextStepFile: './v-02e-validate-sidecar.md'
-validationReport: '{bmb_creations_output_folder}/validation-report-{agent-name}.md'
-agentValidation: ../data/agent-validation.md
-agentCompilation: ../data/agent-compilation.md
-agentFile: '{agent-file-path}'
----
-
-# Validate Step 2d: Validate Structure
-
-## STEP GOAL
-
-Validate the agent's YAML structure and completeness against BMAD standards as defined in agentCompilation.md. Append findings to validation report and auto-advance.
-
-## MANDATORY EXECUTION RULES
-
-- 📖 CRITICAL: Read the complete step file before taking any action
-- 🔄 CRITICAL: Read validationReport and agentCompilation first
-- 🔄 CRITICAL: Load the actual agent file to validate structure
-- 🚫 NO MENU - append findings and auto-advance
-- ✅ YOU MUST ALWAYS SPEAK OUTPUT In your Agent communication style with the config `{communication_language}`
-
-### Step-Specific Rules:
-
-- 🎯 Validate structure against agentCompilation.md rules
-- 📊 Append findings to validation report
-- 🚫 FORBIDDEN to present menu
-
-## EXECUTION PROTOCOLS
-
-- 🎯 Load agentCompilation.md reference
-- 🎯 Load the actual agent file for validation
-- 📊 Validate YAML structure
-- 💾 Append findings to validation report
-- ➡️ Auto-advance to next validation step
-
-## MANDATORY SEQUENCE
-
-**CRITICAL:** Follow this sequence exactly. Do not skip, reorder, or improvise unless user explicitly requests a change.
-
-### 1. Load References
-
-Read `{agentCompilation}`, `{agentValidation}`, `{validationReport}`, and `{agentFile}`.
-
-### 2. Validate Structure
-
-Perform these checks systematically - validate EVERY rule specified in agentCompilation.md:
-
-#### A. YAML Syntax Validation
-- [ ] Parse YAML without errors
-- [ ] Check indentation consistency (2-space standard)
-- [ ] Validate proper escaping of special characters
-- [ ] Verify no duplicate keys in any section
-
-#### B. Frontmatter Validation
-- [ ] All required fields present (name, description, version, etc.)
-- [ ] Field values are correct type (string, boolean, array)
-- [ ] No empty required fields
-- [ ] Proper array formatting with dashes
-- [ ] Boolean fields are actual booleans (not strings)
-
-#### C. Section Completeness
-- [ ] All required sections present based on hasSidecar value
-- [ ] Sections not empty unless explicitly optional
-- [ ] Proper markdown heading hierarchy (##, ###)
-- [ ] No orphaned content without section headers
-
-#### D. Field-Level Validation
-- [ ] Path references exist and are valid
-- [ ] Array fields properly formatted
-- [ ] No malformed YAML structures
-- [ ] File references use correct path format
-
-#### E. Agent Configuration Specific Checks
-
-**For Agents WITHOUT Sidecar (hasSidecar is false):**
-- [ ] No sidecar requirements
-- [ ] No sidecar-folder path in metadata
-- [ ] If critical_actions present, no sidecar file references
-- [ ] Menu handlers use only internal references (#) or inline prompts
-- [ ] Total size under ~250 lines (unless justified)
-
-**For Agents WITH Sidecar (hasSidecar is true):**
-- [ ] hasSidecar flag set correctly in metadata
-- [ ] Sidecar folder path specified in metadata
-- [ ] critical_actions section present with minimum requirements:
-  - [ ] Loads sidecar memories
-  - [ ] Loads sidecar instructions
-  - [ ] Restricts file access to sidecar folder
-- [ ] All critical_actions reference correct `{project-root}/_bmad/_memory/` paths
-- [ ] Menu handlers that update sidecar use correct path format
-
-### 3. Append Findings to Report
-
-Append to `{validationReport}`:
-
-```markdown
-### Structure Validation
-
-**Status:** {✅ PASS / ⚠️ WARNING / ❌ FAIL}
-
-**Configuration:** Agent {WITH|WITHOUT} sidecar
-
-**hasSidecar:** {true|false}
-
-**Checks:**
-- [ ] Valid YAML syntax
-- [ ] Required fields present (name, description, persona, menu)
-- [ ] Field types correct (arrays, strings, booleans)
-- [ ] Consistent 2-space indentation
-- [ ] Configuration appropriate structure
-
-**Detailed Findings:**
-
-*PASSING:*
-{List of passing checks}
-
-*WARNINGS:*
-{List of non-blocking issues}
-
-*FAILURES:*
-{List of blocking issues that must be fixed}
-```
-
-### 4. Auto-Advance
-
-Load and execute `{nextStepFile}` immediately.
-
----
-
-**Validating sidecar structure...**