# PyPI Publishing Fix - Summary

## Problem Statement

The GitHub Actions workflow "Publish to PyPI" was failing with:

- **Error**: `HTTPError: 400 Bad Request from https://upload.pypi.org/legacy/`
- **Root Cause**: Attempting to upload version `0.2.0` which already exists on PyPI
- **Underlying Issue**: Hardcoded version in `pyproject.toml` not synchronized with Git release tags

## Solution Implemented

### 1. Dynamic Versioning with `hatch-vcs`

- **Changed**: `pyproject.toml` now uses `dynamic = ["version"]`
- **Benefit**: Version automatically derived from Git tags
- **Implementation**: Added `hatch-vcs` build dependency
- **Result**: Tag `v0.0.10` → Package version `0.0.10`

### 2. Enhanced Workflow Diagnostics

Added to `.github/workflows/publish.yml`:

- ✅ `fetch-depth: 0` for full Git history (required by hatch-vcs)
- ✅ Distribution file listing (`ls -lh dist/`)
- ✅ Version extraction and display
- ✅ `twine check --strict` validation
- ✅ Pre-upload PyPI version check
- ✅ Verbose logging (`verbose: true`, `print-hash: true`)

### 3. Duplicate Version Prevention

- **Check**: Before upload, queries PyPI to see if version exists
- **Action**: Skips upload with clear warning message if duplicate
- **Benefit**: Prevents 400 errors and provides actionable guidance

### 4. Documentation

Created `RELEASING.md` with:

- Complete release process instructions
- Versioning strategy explanation
- Troubleshooting guide
- TestPyPI testing instructions

## Technical Details

### Version Detection Flow

```text
Git Tag → hatch-vcs → setuptools-scm → Package Version
v0.0.10  →          →                 → 0.0.10
```

### Workflow Behavior

| Scenario | Result |
|----------|--------|
| New version | Uploads to PyPI successfully |
| Existing version | Skips upload with warning |
| No git tag | Builds dev version (e.g., 0.0.9.dev1+hash) |

## Files Modified

1. **pyproject.toml**
   - Removed hardcoded `version = "0.2.0"`
   - Added `dynamic = ["version"]`
   - Added `hatch-vcs` build requirement
   - Configured version source and generation

2. **.github/workflows/publish.yml**
   - Added git history fetch (`fetch-depth: 0`)
   - Added distribution listing steps
   - Added version validation step
   - Added twine check
   - Added PyPI duplicate version check
   - Added verbose logging flags

3. **RELEASING.md** (new)
   - Complete release documentation
   - Versioning strategy guide
   - Troubleshooting section

4. **agentic_devtools/_version.py** (generated)
   - Auto-generated by hatch-vcs during build
   - Contains version string from Git tags

## Benefits

1. ✅ **Prevents 400 errors** from duplicate uploads
2. ✅ **Automatic versioning** from Git tags
3. ✅ **Better diagnostics** with verbose logging
4. ✅ **Early validation** with twine check
5. ✅ **Clear guidance** when issues occur
6. ✅ **No manual version updates** needed

## Testing

Local build test:

```bash
$ python -m build
Successfully built agentic_devtools-0.0.9.dev1+gf5d261924.d20260213-py3-none-any.whl

$ twine check --strict dist/*
Checking dist/*.whl: PASSED
Checking dist/*.tar.gz: PASSED
```

## Next Steps for Users

To publish a new version:

1. Create a git tag: `git tag v0.0.10`
2. Push the tag: `git push origin v0.0.10`
3. Create a GitHub release from the tag
4. The workflow automatically builds and publishes version `0.0.10`

## Acceptance Criteria Met

- ✅ PR includes changes that prevent/fix 400 Bad Request
- ✅ PR includes improved logging/diagnostics
- ✅ Versioning/publishing logic robust against duplicate versions
- ✅ Workflow continues to publish successfully under correct conditions
- ✅ Documentation provided for release process
