refactor: simplify workflow to user-selectable 6-command architecture

Simplifies the workflow orchestrator from hardcoded 11-step atomic operations
to user-selectable 6-command workflow with context passing.

Core changes:
- WorkflowStep enum: 11 steps → 6 commands (create-branch, planning, execute, commit, create-pr, prp-review)
- workflow_orchestrator.py: 367 lines → 200 lines with command stitching loop
- Remove workflow_type field, add selected_commands parameter
- Simplify agent names from 11 → 6 constants
- Remove test/review phase config flags (now optional commands)

Deletions:
- Remove test_workflow.py, review_workflow.py, workflow_phase_tracker.py
- Remove 32 old command files from .claude/commands
- Remove PRPs/specs and PRD files from version control
- Update .gitignore to exclude specs, features, and validation markdown files

Breaking changes:
- AgentWorkOrder no longer has workflow_type field
- CreateAgentWorkOrderRequest now uses selected_commands instead of workflow_type
- WorkflowStep enum values incompatible with old step history

56 files changed, 625 insertions(+), 15,007 deletions(-)

python/.claude/commands/agent-work-orders/create-branch.md

@@ -0,0 +1,104 @@
+# Create Git Branch
+
+Generate a conventional branch name based on user request and create a new git branch.
+
+## Variables
+
+User request: $1
+
+## Instructions
+
+**Step 1: Check Current Branch**
+
+- Check current branch: `git branch --show-current`
+- Check if on main/master:
+  ```bash
+  CURRENT_BRANCH=$(git branch --show-current)
+  if [[ "$CURRENT_BRANCH" != "main" && "$CURRENT_BRANCH" != "master" ]]; then
+    echo "Warning: Currently on branch '$CURRENT_BRANCH', not main/master"
+    echo "Proceeding with branch creation from current branch"
+  fi
+  ```
+- Note: We proceed regardless, but log the warning
+
+**Step 2: Generate Branch Name**
+
+Use conventional branch naming:
+
+**Prefixes:**
+- `feat/` - New feature or enhancement
+- `fix/` - Bug fix
+- `chore/` - Maintenance tasks (dependencies, configs, etc.)
+- `docs/` - Documentation only changes
+- `refactor/` - Code refactoring (no functionality change)
+- `test/` - Adding or updating tests
+- `perf/` - Performance improvements
+
+**Naming Rules:**
+- Use kebab-case (lowercase with hyphens)
+- Be descriptive but concise (max 50 characters)
+- Remove special characters except hyphens
+- No spaces, use hyphens instead
+
+**Examples:**
+- "Add user authentication system" → `feat/add-user-auth`
+- "Fix login redirect bug" → `fix/login-redirect`
+- "Update README documentation" → `docs/update-readme`
+- "Refactor database queries" → `refactor/database-queries`
+- "Add unit tests for API" → `test/api-unit-tests`
+
+**Branch Name Generation Logic:**
+1. Analyze user request to determine type (feature/fix/chore/docs/refactor/test/perf)
+2. Extract key action and subject
+3. Convert to kebab-case
+4. Truncate if needed to keep under 50 chars
+5. Validate name is descriptive and follows conventions
+
+**Step 3: Check Branch Exists**
+
+- Check if branch name already exists:
+  ```bash
+  if git show-ref --verify --quiet refs/heads/<branch-name>; then
+    echo "Branch <branch-name> already exists"
+    # Append version suffix
+    COUNTER=2
+    while git show-ref --verify --quiet refs/heads/<branch-name>-v$COUNTER; do
+      COUNTER=$((COUNTER + 1))
+    done
+    BRANCH_NAME="<branch-name>-v$COUNTER"
+  fi
+  ```
+- If exists, append `-v2`, `-v3`, etc. until unique
+
+**Step 4: Create and Checkout Branch**
+
+- Create and checkout new branch: `git checkout -b <branch-name>`
+- Verify creation: `git branch --show-current`
+- Ensure output matches expected branch name
+
+**Step 5: Verify Branch State**
+
+- Confirm branch created: `git branch --list <branch-name>`
+- Confirm currently on branch: `[ "$(git branch --show-current)" = "<branch-name>" ]`
+- Check remote tracking: `git rev-parse --abbrev-ref --symbolic-full-name @{u} 2>/dev/null || echo "No upstream set"`
+
+**Important Notes:**
+
+- NEVER mention Claude Code, Anthropic, AI, or co-authoring in any output
+- Branch should be created locally only (no push yet)
+- Branch will be pushed later by commit.md command
+- If user request is unclear, prefer `feat/` prefix as default
+
+## Report
+
+Output ONLY the branch name (no markdown, no explanations, no quotes):
+
+<branch-name>
+
+**Example outputs:**
+```
+feat/add-user-auth
+fix/login-redirect-issue
+docs/update-api-documentation
+refactor/simplify-middleware
+```