feat: add hello-world-2 demo file with port configuration

.ports.env

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+# Port range allocated to this work order
+# Each work order gets 10 consecutive ports for flexibility
+# CLI tools can ignore ports, microservices can use multiple
+
+PORT_RANGE_START=9170
+PORT_RANGE_END=9179
+PORT_RANGE_SIZE=10
+
+# Individual ports (use PORT_0, PORT_1, etc.)
+PORT_0=9170
+PORT_1=9171
+PORT_2=9172
+PORT_3=9173
+PORT_4=9174
+PORT_5=9175
+PORT_6=9176
+PORT_7=9177
+PORT_8=9178
+PORT_9=9179
+
+# Convenience aliases (backward compatible with old format)
+BACKEND_PORT=9170
+FRONTEND_PORT=9171
+VITE_BACKEND_URL=http://localhost:9170

PRPs/features/completed/add-hello-world-2-file.md

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+# Feature: Add Hello World 2 Text File
+
+## Feature Description
+
+This feature creates a simple text file named `hello-world-2.txt` in the root directory of the project. The file will contain a greeting message that demonstrates parallel work order execution. This is a lightweight addition to the project structure that serves as a demonstration or testing artifact for parallel work order processing capabilities.
+
+## User Story
+
+As a developer testing parallel work orders
+I want to create a hello-world-2.txt file in the root directory
+So that I can verify that parallel work order execution is functioning correctly
+
+## Problem Statement
+
+During testing and validation of parallel work order processing, there is a need for simple, isolated file creation tasks that can run concurrently without dependencies. Currently, there is no dedicated test artifact that represents parallel work order 2, making it difficult to verify that multiple work orders can execute independently and successfully.
+
+## Solution Statement
+
+Create a new text file named `hello-world-2.txt` in the project root directory with the content "Hello from parallel work order 2!". This provides a simple, verifiable artifact that demonstrates successful execution of a parallel work order without interfering with other project files or functionality.
+
+## Relevant Files
+
+This feature creates a new file and does not modify any existing files:
+
+### New Files
+
+- **hello-world-2.txt** (root directory)
+  - Purpose: Test artifact for parallel work order 2 validation
+  - Content: Simple greeting message demonstrating successful execution
+  - Location: Project root directory (same level as CLAUDE.md, README.md, etc.)
+  - No dependencies on other files
+
+## Relevant Research Documentation
+
+Since this is a simple file creation task, no external libraries or complex technologies are required. However, here are some relevant resources for understanding file operations and testing practices:
+
+- [Python File I/O Documentation](https://docs.python.org/3/tutorial/inputoutput.html#reading-and-writing-files)
+  - [Basic file operations](https://docs.python.org/3/tutorial/inputoutput.html#methods-of-file-objects)
+  - Best practices for reading and writing files in Python
+- [Git Documentation - Working with Files](https://git-scm.com/book/en/v2/Git-Basics-Recording-Changes-to-the-Repository)
+  - [Tracking new files](https://git-scm.com/book/en/v2/Git-Basics-Recording-Changes-to-the-Repository#_tracking_files)
+  - Understanding how Git handles new untracked files
+- [Bash Write Tool Best Practices](https://docs.anthropic.com/en/docs/claude-code/tools#write)
+  - Using the Write tool for file creation
+  - Ensuring proper file path handling
+
+## Implementation Plan
+
+### Phase 1: Foundation
+
+Since this is a simple file creation task with no dependencies, there is minimal foundational work required:
+
+1. Verify that the target location (project root) is accessible
+2. Ensure no existing file with the same name will be overwritten
+3. Confirm the content format matches the requirements
+
+### Phase 2: Core Implementation
+
+The core implementation involves a single file creation operation:
+
+1. Use the Write tool to create `hello-world-2.txt` in the project root
+2. Populate the file with the exact content: "Hello from parallel work order 2!"
+3. Verify file permissions allow reading the file after creation
+
+### Phase 3: Integration
+
+Since this feature operates independently without dependencies:
+
+1. Verify the file exists in the correct location
+2. Confirm the file content matches expectations
+3. Ensure the file does not interfere with existing project functionality
+4. Document the file's purpose if needed (though for a test artifact this is optional)
+
+## Step by Step Tasks
+
+### Task 1: Verify Project Root Location
+
+- Confirm current working directory is the project root
+- Check that we have write permissions in the target directory
+- Verify no existing `hello-world-2.txt` file exists (or confirm overwriting is acceptable)
+
+### Task 2: Create the Text File
+
+- Use the Write tool to create `hello-world-2.txt` in the project root directory
+- Write the exact content: "Hello from parallel work order 2!"
+- Ensure proper line endings (Unix-style LF preferred for consistency)
+
+### Task 3: Validate File Creation
+
+- Verify the file exists using the Read tool or Bash ls command
+- Confirm the file content matches exactly: "Hello from parallel work order 2!"
+- Check file size is appropriate (should be 36 bytes including newline)
+
+### Task 4: Run Validation Commands
+
+- Execute all validation commands listed in the Validation Commands section
+- Verify no regressions were introduced to existing functionality
+- Confirm the file is properly tracked in git status (should appear as untracked)
+
+## Testing Strategy
+
+See `CLAUDE.md` for complete testing requirements. Since this feature creates a standalone text file without code dependencies, testing focuses on file verification rather than unit/integration tests.
+
+### Manual Verification
+
+**File Existence Test:**
+- Verify `hello-world-2.txt` exists in the root directory
+- Location: `/tmp/agent-work-orders/repos/f4f3fd91/trees/sandbox-wo-990a1663/hello-world-2.txt`
+
+**Content Verification Test:**
+- Read file contents and verify exact match
+- Expected: "Hello from parallel work order 2!"
+- No extra whitespace or formatting issues
+
+**Git Status Test:**
+- Run `git status` to confirm file appears as untracked
+- Verify file is not staged or committed yet
+- Ensure file doesn't conflict with .gitignore rules
+
+### Edge Cases
+
+**File Already Exists:**
+- If `hello-world-2.txt` already exists, the Write tool will overwrite it
+- This is acceptable behavior for this test artifact
+
+**Permission Denied:**
+- If write permissions are insufficient, the operation will fail
+- This should be caught during execution and reported
+
+**Incorrect Content:**
+- Verify content matches exactly (case-sensitive, punctuation-sensitive)
+- No trailing/leading whitespace beyond intentional newline
+
+**Wrong Location:**
+- Ensure file is created in project root, not a subdirectory
+- Verify absolute path matches expected location
+
+## Acceptance Criteria
+
+1. **File Creation**: A file named `hello-world-2.txt` must exist in the project root directory
+2. **Content Accuracy**: The file must contain exactly the text "Hello from parallel work order 2!"
+3. **Location Verification**: The file must be located at the project root level (same directory as CLAUDE.md, README.md, pyproject.toml)
+4. **No Side Effects**: Creating this file must not break any existing functionality or tests
+5. **Git Status**: The file should appear in `git status` as an untracked file
+6. **Readable**: The file must be readable by standard text editors and command-line tools (cat, less, etc.)
+
+## Validation Commands
+
+Execute every command to validate the feature works correctly with zero regressions.
+
+**File Existence Check:**
+```bash
+ls -la hello-world-2.txt
+```
+Expected: File exists with appropriate permissions (typically -rw-r--r--)
+
+**Content Verification:**
+```bash
+cat hello-world-2.txt
+```
+Expected output: "Hello from parallel work order 2!"
+
+**File Size Check:**
+```bash
+wc -c hello-world-2.txt
+```
+Expected: 36 bytes (or 35 if no trailing newline)
+
+**Git Status Check:**
+```bash
+git status
+```
+Expected: hello-world-2.txt appears as an untracked file
+
+**Verify No Test Regressions:**
+
+Since this is a standalone text file with no code changes, traditional linting and testing commands are not applicable. However, we should verify the project structure remains intact:
+
+```bash
+# Verify project structure is unchanged
+ls -la | grep -E "(CLAUDE.md|README.md|pyproject.toml)"
+```
+Expected: All core project files still exist
+
+```bash
+# Verify the file doesn't break any existing tests (if applicable)
+uv run pytest tests/ -v --tb=short
+```
+Expected: All existing tests continue to pass (if tests exist)
+
+**Required validation commands:**
+
+- `ls -la hello-world-2.txt` - File must exist
+- `cat hello-world-2.txt` - Content must match exactly
+- `git status` - File must appear as untracked
+
+## Notes
+
+### Purpose and Context
+
+This file is created as part of testing parallel work order execution. It serves as a simple, verifiable artifact that demonstrates successful concurrent task processing without dependencies on other work orders.
+
+### Future Considerations
+
+- This file may be temporary and could be removed after validation
+- If kept long-term, consider adding to .gitignore if it's purely a test artifact
+- Could be extended to include timestamps or execution metadata in the future
+- May serve as a template for other parallel work order validation tasks
+
+### Implementation Simplicity
+
+Following the KISS principle from CLAUDE.md, this implementation is intentionally minimal:
+- Single file creation operation
+- No dependencies on external libraries
+- No complex logic or error handling needed
+- Straightforward validation through basic file operations
+
+### Relationship to Other Work Orders
+
+This is "parallel work order 2", implying there may be other parallel work orders (e.g., work order 1, work order 3, etc.). This file should not depend on or interfere with those other work orders, demonstrating true parallel execution capability.

hello-world-2.txt

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+Hello from parallel work order 2!