# PyPI Release Handover - 2025-12-02

**Status:** Test-PyPI Release Complete (2.4.0rc4)
**Date:** 2025-12-02
**Session Focus:** Package Release Preparation, Version Synchronization, Critical Bug Fixes

---

## Executive Summary

Package `llm-security-firewall` version 2.4.0rc4 has been successfully uploaded to Test-PyPI. All critical issues identified during the release process have been resolved. The package is installable, imports correctly, and the core API functions as expected. Version synchronization between repository and package metadata is complete.

---

## Completed Tasks

### 1. Version Synchronization

**Problem:** Discrepancy between CHANGELOG (ending at 2.3.4) and package metadata (5.0.0rc* versions).

**Resolution:**
- Version set to 2.4.0rc1 (semantic versioning: minor increment for feature additions)
- All metadata files synchronized: `pyproject.toml`, `__init__.py`, `README.md`, `CHANGELOG.md`
- Old versions (5.0.0rc1, 5.0.0rc2, 5.0.0rc3) yanked on Test-PyPI

**Files Modified:**
- `CHANGELOG.md`: Added entries for 2.4.0rc1, 2.4.0rc2, 2.4.0rc3, 2.4.0rc4
- `pyproject.toml`: Version updated to 2.4.0rc4
- `src/llm_firewall/__init__.py`: `__version__` updated to 2.4.0rc4
- `README.md`: Version and architecture descriptions updated

---

### 2. Package Metadata Corrections

**Email Address:**
- Changed from `info@hakgal.org` to `sookoothaii@proton.me`
- Updated in `pyproject.toml` (authors, maintainers) and `README.md`

**Package Description:**
- Updated to match actual repository state
- Removed test count claims that may become outdated
- Description now reflects implemented features, not aspirational goals

**Architecture Documentation:**
- Corrected from "functional adapters" to "Protocol-based Port/Adapter interfaces"
- Updated cache behavior from "fail-open" to "fail-safe behavior"
- Added Developer Adoption API (`guard.py`) documentation
- Added LangChain Integration (`FirewallCallbackHandler`) documentation

---

### 3. Critical Bug Fixes

#### 3.1 IndentationError in firewall_engine_v2.py

**Location:** Line 327
**Error:** `IndentationError: unindent does not match any outer indentation level`

**Root Cause:** Incorrect indentation in cache handling block (lines 316-327). Code block was indented too far, causing `except` clause to not match any `try` statement.

**Fix:** Corrected indentation of `if cached:` block and removed orphaned `except` clause.

**Version:** Fixed in 2.4.0rc3

---

#### 3.2 Import Conflict: ports.py vs ports/ Directory

**Error:** `ImportError: cannot import name 'DecisionCachePort' from 'llm_firewall.core.ports'`

**Root Cause:**
- Both `src/llm_firewall/core/ports.py` (file) and `src/llm_firewall/core/ports/` (directory) existed
- Python imports directory over file when both exist
- `ports/__init__.py` was empty, causing import failure
- Build cache (`build/`, `*.egg-info/`) contained old `ports.py` even after deletion

**Fix:**
1. Moved Protocol definitions from `ports.py` to `ports/__init__.py`
2. Deleted `ports.py` file
3. Cleared build cache: `Remove-Item -Recurse -Force build`, `Remove-Item -Recurse -Force src/llm_security_firewall.egg-info`
4. Verified wheel contents: Only `ports/__init__.py` present, no `ports.py`

**Version:** Fixed in 2.4.0rc4

**Verification:**
```python
# Wheel content check
import zipfile
z = zipfile.ZipFile('dist/package.whl')
files = z.namelist()
assert 'llm_firewall/core/ports.py' not in files  # Should not exist
assert any('core/ports/__init__.py' in f for f in files)  # Should exist
```

---

### 4. Package Contents Verification

**Lexicons Inclusion:**
- `MANIFEST.in` updated to include:
  - `recursive-include src/llm_firewall/lexicons *.json`
  - `recursive-include src/llm_firewall/lexicons_gpt5 *.json`
- Package contains 11 lexicon files (verified in wheel)

**Total Files in Wheel:** 284 files
**Wheel Size:** ~530 KB
**Source Distribution Size:** ~869 KB

---

### 5. Test-PyPI Upload Process

**Versions Uploaded:**
- 2.4.0rc1: Initial release with corrected metadata
- 2.4.0rc2: README corrections
- 2.4.0rc3: IndentationError fix
- 2.4.0rc4: Import conflict resolution

**Versions Yanked:**
- 5.0.0rc1, 5.0.0rc2, 5.0.0rc3 (to prevent version confusion)

**Upload Method:**
- Environment variables: `TWINE_USERNAME=__token__`, `TWINE_PASSWORD`
- Repository URL: `https://test.pypi.org/legacy/`
- Validation: `twine check` (PASSED for all versions)

---

### 6. Installation Validation

**Test Environment:**
- Fresh virtual environment: `validate_rc4_final`
- Package: `llm-security-firewall==2.4.0rc4` from Test-PyPI
- Core dependencies installed: pyyaml, numpy, scipy, scikit-learn, blake3, requests, redis, pydantic, psutil, cryptography

**Test Results:**
- ✅ Installation: Successful (513 KB wheel downloaded)
- ✅ Version check: `2.4.0rc4` (correct)
- ✅ Protocol import: `from llm_firewall.core.ports import DecisionCachePort` (works)
- ✅ API import: `from llm_firewall import guard` (works)
- ✅ API functionality: `guard.check_input("Test prompt")` returns `FirewallDecision` with correct structure
- ✅ Malicious input test: `guard.check_input("DROP TABLE users;")` (blocked as expected)

**Known Limitations in Test:**
- `sentence-transformers` not installed → SemanticVectorCheck disabled (expected)
- `UnicodeSanitizer` not available → Input sanitization limited (expected)
- `Kids Policy Engine` not available → Input/Output validation limited (expected)

These are optional dependencies and do not prevent core functionality.

---

## Technical Issues Encountered

### Issue 1: Build Cache Contamination

**Problem:** Build cache (`build/`, `*.egg-info/`) retained deleted files after structural changes.

**Impact:** Wheel contained both old and new file structures, causing import conflicts.

**Solution:** Clear build cache before rebuilding after structural changes (file deletions, directory moves).

**Prevention:** Add to release checklist: "Clear build cache after structural changes"

---

### Issue 2: Test-PyPI Indexing Delay

**Problem:** New uploads require 30-60 seconds for indexing. Tests executed too early fail with "No matching distribution found".

**Impact:** False negatives in validation tests, unnecessary version increments.

**Solution:** Implement wait period (30-60 seconds) after upload before testing.

**Prevention:** Add to release checklist: "Wait 60 seconds after upload before testing"

---

### Issue 3: Virtual Environment Contamination

**Problem:** Reusing virtual environments from previous tests caused import errors from old package versions.

**Impact:** Tests failed even when new package was correct.

**Solution:** Always create fresh virtual environment for each test cycle.

**Prevention:** Add to release checklist: "Use fresh virtual environment for each test"

---

## Current Package State

### Version Information

- **Package Version:** 2.4.0rc4
- **Python Requirement:** >=3.12
- **License:** MIT
- **Status:** Release Candidate

### Architecture

- **Pattern:** Protocol-based Hexagonal Architecture (Port/Adapter)
- **Dependency Injection:** Constructor injection via `composition_root.py`
- **Protocol Definitions:** `src/llm_firewall/core/ports/__init__.py`
  - `DecisionCachePort`: Cache adapter protocol
  - `DecoderPort`: Normalization layer protocol
  - `ValidatorPort`: WASM validation protocol (future)

### Core Components

- **Firewall Engine:** `src/llm_firewall/core/firewall_engine_v2.py`
- **Developer API:** `src/llm_firewall/guard.py` (`check_input`, `check_output`)
- **Cache Adapter:** `src/llm_firewall/cache/cache_adapter.py` (fail-safe policy)
- **Composition Root:** `src/llm_firewall/app/composition_root.py`
- **LangChain Integration:** `src/llm_firewall/integrations/langchain/callbacks.py`

### Dependencies

**Core:** numpy, scipy, scikit-learn, pyyaml, blake3, requests, psycopg, redis, pydantic, psutil, cryptography

**Optional:** torch, transformers, sentence-transformers, onnx, onnxruntime (ML features)

---

## Known Limitations

1. **False Positive Rate:** Kids Policy false positive rate is approximately 20-25% (target: <5%)
2. **Memory Usage:** Batch processing exceeds 300MB cap (measured: ~1.3GB for adversarial inputs)
3. **Optional Dependencies:** Some features require optional dependencies (sentence-transformers, emoji library)
4. **Test Coverage:** v2.4.0rc1 features (Hexagonal Architecture, Developer API, LangChain) lack dedicated test coverage

---

## Release Process Improvements

### Lessons Learned

1. **Build Cache Management:**
   - Always clear build cache after structural changes
   - Verify wheel contents before upload
   - Use `--clean` flag or manual cache deletion

2. **Pre-Upload Validation:**
   - Test imports locally before building
   - Verify wheel contents match source structure
   - Check for file conflicts (e.g., `ports.py` vs `ports/`)

3. **Post-Upload Testing:**
   - Wait 60 seconds after upload for Test-PyPI indexing
   - Use fresh virtual environment for each test
   - Install minimal dependencies first, then test core functionality

4. **Version Management:**
   - Yank incorrect versions immediately
   - Document version increments in CHANGELOG
   - Tag releases in Git after successful Test-PyPI validation

---

## Git Status

**Current Branch:** `main`
**Last Commit:** `chore: finalize 2.4.0rc2 release - sync metadata and documentation`
**Git Tag:** `v2.4.0rc2` (created and pushed)

**Note:** Tag `v2.4.0rc2` was created before critical fixes (IndentationError, Import conflict). Consider creating `v2.4.0rc4` tag after successful validation.

**Uncommitted Changes:**
- `CHANGELOG.md`: 2.4.0rc3, 2.4.0rc4 entries
- `pyproject.toml`: Version 2.4.0rc4
- `src/llm_firewall/__init__.py`: Version 2.4.0rc4
- `src/llm_firewall/core/ports/__init__.py`: Protocol definitions (moved from ports.py)
- `src/llm_firewall/core/firewall_engine_v2.py`: IndentationError fix
- Documentation updates

---

## Next Steps

### Immediate (Pre-Production)

1. **Commit Current Changes:**
   - All fixes for 2.4.0rc3 and 2.4.0rc4
   - Create Git tag `v2.4.0rc4`

2. **Final Validation:**
   - Test malicious input blocking
   - Test with optional dependencies installed
   - Verify all examples work

3. **Documentation Sync:**
   - Update `docs/TECHNICAL_HANDOVER_2025_12_01.md` with final status
   - Update `docs/EXTERNAL_REVIEW_RESPONSE.md` with completed items

### Production Release (Blocked Until)

1. All Test-PyPI validation tests pass
2. Git tag created and pushed
3. All changes committed
4. No critical issues identified
5. Production PyPI API token obtained

---

## Test Results Summary

### Installation Test (2.4.0rc4)

- **Package Download:** ✅ Successful (513 KB)
- **Installation:** ✅ Successful
- **Version Verification:** ✅ `2.4.0rc4`
- **Protocol Import:** ✅ `DecisionCachePort` imports correctly
- **API Import:** ✅ `guard` module imports correctly
- **API Functionality:** ✅ `guard.check_input()` returns `FirewallDecision` with correct structure
- **Malicious Input:** ✅ Blocked as expected

### Known Test Limitations

- Optional dependencies not installed in test environment (expected behavior)
- Some features disabled due to missing optional dependencies (expected behavior)
- Full integration tests not performed (requires additional dependencies)

---

## Files Modified in This Session

### Source Code
- `src/llm_firewall/core/firewall_engine_v2.py`: IndentationError fix
- `src/llm_firewall/core/ports/__init__.py`: Protocol definitions (moved from ports.py)
- `src/llm_firewall/core/ports.py`: Deleted (conflict with ports/ directory)

### Configuration
- `pyproject.toml`: Version updates (2.4.0rc1 → 2.4.0rc4), metadata corrections
- `MANIFEST.in`: Lexicon includes
- `src/llm_firewall/__init__.py`: Version updates

### Documentation
- `CHANGELOG.md`: Entries for 2.4.0rc1, 2.4.0rc2, 2.4.0rc3, 2.4.0rc4
- `README.md`: Architecture corrections, Developer API, LangChain Integration
- `docs/EXTERNAL_REVIEW_RESPONSE.md`: Status updates
- `docs/TEST_RESULTS_SUMMARY.md`: v2.4.0rc1 feature test requirements
- `docs/TECHNICAL_HANDOVER_2025_12_01.md`: Architecture notes update
- `docs/CIRCULAR_ERROR_ANALYSIS.md`: Root cause analysis
- `docs/PYPI_RELEASE_HANDOVER_2025_12_02.md`: This document

---

## References

- Test-PyPI Project: https://test.pypi.org/project/llm-security-firewall/2.4.0rc4/
- Session Handover: `docs/SESSION_HANDOVER_2025_12_01.md`
- PyPI Release Report: `docs/PYPI_RELEASE_REPORT_2025_12_02.md`
- Circular Error Analysis: `docs/CIRCULAR_ERROR_ANALYSIS.md`

---

**Report Generated:** 2025-12-02
**Status:** Test-PyPI Release Complete (2.4.0rc4), Production Release Pending Final Validation

