# 🔮 prism-config (Python) - Complete To-Do List

---

## 📋 Iteration 1: Dict Loading ✅ COMPLETE

- [x] **1.1** Set up project structure (src/, tests/, docs/)
- [x] **1.2** Create `.gitignore` for Python + Java + IDEs
- [x] **1.3** Create `pyproject.toml` with Hatchling configuration
- [x] **1.4** Create `requirements.txt` (production dependencies)
- [x] **1.5** Create `requirements-dev.txt` (dev dependencies)
- [x] **1.6** Create `setup-dev.ps1` (Windows setup script)
- [x] **1.7** Create `setup-dev.sh` (Linux/Mac setup script)
- [x] **1.8** Create virtual environment and install dependencies
- [x] **1.9** Create pytest fixtures (`conftest.py`)
- [x] **1.10** Define Pydantic models (`models.py`)
  - [x] `AppConfig` model
  - [x] `DatabaseConfig` model
  - [x] `ConfigRoot` model with validation
- [x] **1.11** Implement `PrismConfig.from_dict()` in `loader.py`
- [x] **1.12** Write Golden Path test (dict loading)
- [x] **1.13** Write test for type preservation
- [x] **1.14** Write test for missing required fields
- [x] **1.15** Verify 100% coverage of implemented features
- [x] **1.16** Create initial `README.md` with quickstart
- [x] **1.17** Create `CODEX.md` with design decisions
- [x] **1.18** Create `VERIFY.md` for environment verification
- [x] **1.19** Git commit: "feat: Iteration 1 - Dict loading complete"

---

## 📋 Iteration 2: YAML File Loading ✅ COMPLETE

- [x] **2.1** Write test: Load config from YAML file (`test_yaml_loading`)
- [x] **2.2** Write test: Handle file not found error
- [x] **2.3** Write test: Handle invalid YAML syntax
- [x] **2.4** Write test: Handle empty YAML file
- [x] **2.5** Write test: YAML with comments (should be preserved/ignored correctly)
- [x] **2.6** Implement `PrismConfig.from_file(path: Path | str)` method
- [x] **2.7** Add YAML parsing with `yaml.safe_load()`
- [x] **2.8** Add helpful error messages for file errors
- [x] **2.9** Add helpful error messages for YAML parse errors
- [x] **2.10** Update `conftest.py` with YAML file fixtures
- [x] **2.11** Verify all tests pass (10 tests, all passing)
- [x] **2.12** Verify 100% coverage of new code (92% on loader.py)
- [x] **2.13** Update `README.md` with YAML loading examples
- [x] **2.14** Update `CODEX.md` test coverage map
- [x] **2.15** Git commit: "feat: Iteration 2 - YAML file loading"
- [x] **2.16** BONUS: Added test for non-dict YAML content validation

---

## 📋 Iteration 3: Environment Variable Override ✅ COMPLETE

- [x] **3.1** Write test: Env var overrides dict value (`APP_DATABASE__HOST`)
- [x] **3.2** Write test: Nested env var override (`APP_DATABASE__PORT`)
- [x] **3.3** Write test: Env var with underscore vs double-underscore
- [x] **3.4** Write test: Case sensitivity handling
- [x] **3.5** Write test: Type coercion from env vars (string "5432" → int 5432)
- [x] **3.6** Write test: Boolean env vars ("true", "True", "1" all work)
- [x] **3.7** Write test: Prefix filtering and invalid path handling
- [x] **3.8** Implement env var parsing logic
- [x] **3.9** Add `_apply_env_overrides()` private method
- [x] **3.10** Add env var prefix configuration (default: `APP_`)
- [x] **3.11** Implement nested key resolution (double-underscore separator)
- [x] **3.12** Implement type coercion via Pydantic (automatic)
- [x] **3.13** Add validation that env vars match schema (invalid paths ignored)
- [x] **3.14** Verify all tests pass (23 total tests, all passing)
- [x] **3.15** Verify 100% coverage (94% on loader.py, 100% on models.py)
- [x] **3.16** Update `README.md` with env var examples
- [x] **3.17** Update `CODEX.md` with env var naming conventions
- [x] **3.18** Git commit: "feat: Iteration 3 - Environment variable override"
- [x] **3.19** BONUS: Added test for env override from file
- [x] **3.20** BONUS: Added test for disabled override behavior

---

## 📋 Documentation & Polish ✅ COMPLETE

- [x] **DOC.1** Create comprehensive README.md with ASCII logo
- [x] **DOC.2** Add badges (Python version, MIT license, Ruff)
- [x] **DOC.3** Structure README with clear sections and navigation
- [x] **DOC.4** Add usage examples for all features (dict, YAML, env vars)
- [x] **DOC.5** Add Docker integration examples
- [x] **DOC.6** Add development setup instructions
- [x] **DOC.7** Add project structure overview
- [x] **DOC.8** Add contributing guidelines
- [x] **DOC.9** Create MIT LICENSE file
- [x] **DOC.10** Add acknowledgments and support sections
- [x] **DOC.11** Git commit: "docs: Enhance README with ASCII logo and comprehensive documentation"

---

## 📋 Iteration 4: CLI Arguments Override

- [ ] **4.1** Write test: CLI arg overrides env var and file
- [ ] **4.2** Write test: CLI arg format `--database.host=localhost`
- [ ] **4.3** Write test: CLI arg format `--database-host=localhost`
- [ ] **4.4** Write test: Short flags `-h` for `--host`
- [ ] **4.5** Write test: Boolean flags `--debug` (no value needed)
- [ ] **4.6** Implement CLI argument parsing using `argparse`
- [ ] **4.7** Add `from_args()` class method
- [ ] **4.8** Add `from_all()` method (dict + file + env + cli)
- [ ] **4.9** Document precedence order in docstrings
- [ ] **4.10** Verify all tests pass
- [ ] **4.11** Verify 100% coverage
- [ ] **4.12** Update `README.md` with CLI examples
- [ ] **4.13** Update `CODEX.md` with precedence rules
- [ ] **4.14** Git commit: "feat: Iteration 4 - CLI argument override"

---

## 📋 Iteration 5: Secret Resolution System (REF:: Syntax)

### 5.1: Provider Interface

- [ ] **5.1.1** Write test: Define `SecretProvider` Protocol
- [ ] **5.1.2** Write test: Provider registration system
- [ ] **5.1.3** Write test: Provider lookup by name
- [ ] **5.1.4** Implement `SecretProvider` Protocol in `providers.py`
  ```python
  class SecretProvider(Protocol):
      def resolve(self, key_path: str) -> str
      def supports_rotation(self) -> bool
      def max_value_size(self) -> int
  ```
- [ ] **5.1.5** Implement provider registry (dict mapping name → provider)
- [ ] **5.1.6** Add `register_provider(name, provider)` function
- [ ] **5.1.7** Add `get_provider(name)` function
- [ ] **5.1.8** Verify tests pass

### 5.2: ENV Provider

- [ ] **5.2.1** Write test: `REF::ENV::DB_PASSWORD` resolves to env var
- [ ] **5.2.2** Write test: ENV provider handles missing var gracefully
- [ ] **5.2.3** Write test: ENV provider max_value_size is unlimited
- [ ] **5.2.4** Implement `EnvSecretProvider` class
- [ ] **5.2.5** Auto-register ENV provider on import
- [ ] **5.2.6** Verify tests pass

### 5.3: FILE Provider

- [ ] **5.3.1** Write test: `REF::FILE::/run/secrets/db_pass` reads file
- [ ] **5.3.2** Write test: FILE provider strips trailing newlines
- [ ] **5.3.3** Write test: FILE provider handles missing file
- [ ] **5.3.4** Write test: FILE provider handles permission denied
- [ ] **5.3.5** Write test: FILE provider max_value_size = 1MB
- [ ] **5.3.6** Implement `FileSecretProvider` class
- [ ] **5.3.7** Auto-register FILE provider on import
- [ ] **5.3.8** Verify tests pass

### 5.4: Resolution Engine

- [ ] **5.4.1** Write test: Detect `REF::` prefix in config values
- [ ] **5.4.2** Write test: Parse `REF::PROVIDER::KEY_PATH` syntax
- [ ] **5.4.3** Write test: Invalid syntax raises clear error
- [ ] **5.4.4** Write test: Unknown provider raises clear error
- [ ] **5.4.5** Write test: Circular reference detection
- [ ] **5.4.6** Write test: Nested references (`REF::ENV::REF_NAME` → `REF::FILE::...`)
- [ ] **5.4.7** Implement `_resolve_secrets()` private method
- [ ] **5.4.8** Add regex pattern for REF detection: `r"REF::(\w+)::(.+)"`
- [ ] **5.4.9** Integrate resolution into `from_dict()` / `from_file()`
- [ ] **5.4.10** Verify all tests pass
- [ ] **5.4.11** Verify 100% coverage

### 5.5: Documentation & Examples

- [ ] **5.5.1** Update `README.md` with secret resolution examples
- [ ] **5.5.2** Create `examples/secrets/` directory
- [ ] **5.5.3** Create example: ENV-based secrets
- [ ] **5.5.4** Create example: FILE-based secrets (Docker secrets)
- [ ] **5.5.5** Update `CODEX.md` with provider resolution rules
- [ ] **5.5.6** Document provider priority (explicit beats implicit)
- [ ] **5.5.7** Git commit: "feat: Iteration 5 - Secret resolution system"

---

## 📋 Iteration 6: The Neon Dump (Aesthetic Output)

### 6.1: Palette System

- [ ] **6.1.1** Create `prism-palette.toml` at repository root
- [ ] **6.1.2** Write test: Load palette from TOML file
- [ ] **6.1.3** Write test: Palette colors are ANSI 256 codes
- [ ] **6.1.4** Write test: Palette emojis are UTF-8 strings
- [ ] **6.1.5** Write test: Palette box style selection
- [ ] **6.1.6** Write test: Fallback to default if palette file missing
- [ ] **6.1.7** Implement `Palette` dataclass in `display.py`
- [ ] **6.1.8** Implement `load_palette(path)` function
- [ ] **6.1.9** Create default vaporwave palette
- [ ] **6.1.10** Verify tests pass

### 6.2: Table Rendering

- [ ] **6.2.1** Write test: Render simple 2-column table
- [ ] **6.2.2** Write test: Auto-calculate column widths
- [ ] **6.2.3** Write test: Apply box-drawing characters (double/single/rounded)
- [ ] **6.2.4** Write test: Apply ANSI colors to headers
- [ ] **6.2.5** Write test: Gradient colors (pink → cyan → purple)
- [ ] **6.2.6** Write test: Emoji prefixes for categories
- [ ] **6.2.7** Implement `render_table()` function in `display.py`
- [ ] **6.2.8** Add dependency: `wcwidth` for Unicode width calculation
- [ ] **6.2.9** Implement box-drawing character sets
- [ ] **6.2.10** Implement ANSI color formatting
- [ ] **6.2.11** Verify tests pass

### 6.3: Config Dump

- [ ] **6.3.1** Write test: `config.dump()` returns formatted table string
- [ ] **6.3.2** Write test: Secrets are redacted (password, key, token, secret)
- [ ] **6.3.3** Write test: Redaction format: `[🔒 REDACTED]`
- [ ] **6.3.4** Write test: Non-secret values are visible
- [ ] **6.3.5** Write test: Nested config flattened to dot notation
- [ ] **6.3.6** Write test: Emoji category detection (💾 for database, 🌐 for api)
- [ ] **6.3.7** Implement `dump()` method on `PrismConfig`
- [ ] **6.3.8** Implement `_flatten_config()` helper (nested dict → flat)
- [ ] **6.3.9** Implement `_redact_secrets()` helper
- [ ] **6.3.10** Implement `_detect_category()` helper (key → emoji)
- [ ] **6.3.11** Verify all tests pass
- [ ] **6.3.12** Verify 100% coverage

### 6.4: Startup Banner

- [ ] **6.4.1** Write test: Banner prints on `config.display()`
- [ ] **6.4.2** Write test: Banner includes table of config
- [ ] **6.4.3** Write test: Banner respects `PRISM_NO_COLOR` env var
- [ ] **6.4.4** Write test: Banner detects non-TTY and disables color
- [ ] **6.4.5** Create ASCII art for "PRISM CONFIG LOADED"
- [ ] **6.4.6** Implement `display()` method on `PrismConfig`
- [ ] **6.4.7** Implement TTY detection (`sys.stdout.isatty()`)
- [ ] **6.4.8** Implement NO_COLOR standard support
- [ ] **6.4.9** Verify tests pass

### 6.5: Documentation & Polish

- [ ] **6.5.1** Create example: Custom palette file
- [ ] **6.5.2** Create example: Monochrome palette (production)
- [ ] **6.5.3** Update `README.md` with aesthetic examples
- [ ] **6.5.4** Add screenshots to `docs/images/`
- [ ] **6.5.5** Update `CODEX.md` with palette customization guide
- [ ] **6.5.6** Git commit: "feat: Iteration 6 - The Neon Dump"

---

## 📋 Iteration 7: PQC Stress Testing

- [ ] **7.1** Write test: Load config value of 1KB
- [ ] **7.2** Write test: Load config value of 8KB
- [ ] **7.3** Write test: Load config value of 16KB (Kyber-1024 size)
- [ ] **7.4** Write test: Load config value of 32KB (future-proofing)
- [ ] **7.5** Write property test: Random large values (Hypothesis)
- [ ] **7.6** Write test: FILE provider reads 16KB secret file
- [ ] **7.7** Write test: ENV provider handles 16KB env var
- [ ] **7.8** Write test: YAML file with 16KB value parses correctly
- [ ] **7.9** Add validation warning if value > 16KB
- [ ] **7.10** Benchmark: Load time for config with large values
- [ ] **7.11** Optimize if necessary (streaming, lazy loading)
- [ ] **7.12** Verify all tests pass
- [ ] **7.13** Update `CODEX.md` with PQC validation results
- [ ] **7.14** Git commit: "test: Iteration 7 - PQC stress testing"

---

## 📋 Iteration 8: Property-Based Testing (Hypothesis)

- [ ] **8.1** Write property test: Any valid dict loads successfully
- [ ] **8.2** Write property test: Type coercion is reversible
- [ ] **8.3** Write property test: Env var override is idempotent
- [ ] **8.4** Write property test: Secret resolution never exposes raw secrets
- [ ] **8.5** Write property test: Config serialization round-trips correctly
- [ ] **8.6** Write property test: Large random configs don't crash
- [ ] **8.7** Define Hypothesis strategies for config generation
- [ ] **8.8** Add `@given` decorators to property tests
- [ ] **8.9** Run property tests with 1000+ examples
- [ ] **8.10** Fix any bugs discovered by property tests
- [ ] **8.11** Verify all tests pass
- [ ] **8.12** Git commit: "test: Iteration 8 - Property-based testing"

---

## 📋 Iteration 9: Advanced Features

### 9.1: Config Validation

- [ ] **9.1.1** Write test: Custom validators with `@field_validator`
- [ ] **9.1.2** Write test: Cross-field validation (e.g., max > min)
- [ ] **9.1.3** Write test: Conditional validation (if prod, require X)
- [ ] **9.1.4** Document validator patterns in `CODEX.md`

### 9.2: Config Freezing

- [ ] **9.2.1** Write test: Config is immutable after load
- [ ] **9.2.2** Write test: Attempting mutation raises FrozenError
- [ ] **9.2.3** Implement `frozen=True` in Pydantic models
- [ ] **9.2.4** Document immutability guarantee

### 9.3: Config Serialization

- [ ] **9.3.1** Write test: Export config to dict (`.to_dict()`)
- [ ] **9.3.2** Write test: Export config to YAML (`.to_yaml()`)
- [ ] **9.3.3** Write test: Export config to JSON (`.to_json()`)
- [ ] **9.3.4** Write test: Secrets are redacted in exports
- [ ] **9.3.5** Implement serialization methods

### 9.4: Config Diffing

- [ ] **9.4.1** Write test: Diff two configs (what changed?)
- [ ] **9.4.2** Write test: Diff output is human-readable
- [ ] **9.4.3** Implement `diff()` class method
- [ ] **9.4.4** Create example: Config change detection

- [ ] **9.5** Git commit: "feat: Iteration 9 - Advanced features"

---

## 📋 Iteration 10: Performance & Optimization

- [ ] **10.1** Create benchmark suite (`benchmarks/` directory)
- [ ] **10.2** Benchmark: Load time for small config (<1KB)
- [ ] **10.3** Benchmark: Load time for large config (>1MB)
- [ ] **10.4** Benchmark: Secret resolution overhead
- [ ] **10.5** Benchmark: Memory usage with large configs
- [ ] **10.6** Profile with `cProfile` / `py-spy`
- [ ] **10.7** Optimize hot paths (caching, lazy loading)
- [ ] **10.8** Add `@lru_cache` where appropriate
- [ ] **10.9** Document performance characteristics in `CODEX.md`
- [ ] **10.10** Git commit: "perf: Iteration 10 - Performance optimization"

---

## 📋 Iteration 11: Error Handling & Developer Experience

### 11.1: Error Messages

- [ ] **11.1.1** Write test: Missing file error includes full path
- [ ] **11.1.2** Write test: YAML syntax error shows line number
- [ ] **11.1.3** Write test: Validation error shows field name and reason
- [ ] **11.1.4** Write test: Secret resolution error shows provider and key
- [ ] **11.1.5** Write test: Type coercion error shows expected vs actual
- [ ] **11.1.6** Implement custom exception classes
  - `ConfigFileNotFoundError`
  - `ConfigParseError`
  - `ConfigValidationError`
  - `SecretResolutionError`
- [ ] **11.1.7** Add helpful error messages with suggestions
- [ ] **11.1.8** Verify error messages are actionable

### 11.2: Logging

- [ ] **11.2.1** Write test: Config loading is logged (info level)
- [ ] **11.2.2** Write test: Secret resolution is logged (debug level)
- [ ] **11.2.3** Write test: Errors are logged with full context
- [ ] **11.2.4** Add Python `logging` integration
- [ ] **11.2.5** Use logger name `prism.config`
- [ ] **11.2.6** Document logging configuration

### 11.3: Type Hints

- [ ] **11.3.1** Add type hints to all public methods
- [ ] **11.3.2** Add type hints to all private methods
- [ ] **11.3.3** Run `mypy --strict` and fix issues
- [ ] **11.3.4** Add `py.typed` marker file
- [ ] **11.3.5** Verify type hints with `pyright`

- [ ] **11.4** Git commit: "feat: Iteration 11 - Error handling & DX"

---

## 📋 Iteration 12: Documentation & Examples

### 12.1: API Documentation

- [ ] **12.1.1** Write docstrings for all public classes
- [ ] **12.1.2** Write docstrings for all public methods
- [ ] **12.1.3** Add usage examples in docstrings
- [ ] **12.1.4** Add type information in docstrings
- [ ] **12.1.5** Generate docs with `mkdocs`
- [ ] **12.1.6** Add API reference to docs site

### 12.2: User Guide

- [ ] **12.2.1** Write "Getting Started" guide
- [ ] **12.2.2** Write "Configuration Files" guide
- [ ] **12.2.3** Write "Environment Variables" guide
- [ ] **12.2.4** Write "Secret Management" guide
- [ ] **12.2.5** Write "Customization" guide
- [ ] **12.2.6** Write "Troubleshooting" guide
- [ ] **12.2.7** Add guides to docs site

### 12.3: Examples

- [ ] **12.3.1** Create `examples/01-basic/` - Simple dict config
- [ ] **12.3.2** Create `examples/02-yaml/` - YAML file config
- [ ] **12.3.3** Create `examples/03-env-vars/` - Environment overrides
- [ ] **12.3.4** Create `examples/04-secrets/` - Secret resolution
- [ ] **12.3.5** Create `examples/05-docker/` - Docker secrets
- [ ] **12.3.6** Create `examples/06-kubernetes/` - K8s ConfigMaps
- [ ] **12.3.7** Create `examples/07-custom-palette/` - Aesthetic customization
- [ ] **12.3.8** Create `examples/08-validation/` - Custom validators
- [ ] **12.3.9** Add README to each example
- [ ] **12.3.10** Test all examples work

### 12.4: Architecture Decision Records (ADRs)

- [ ] **12.4.1** Write ADR: Why Pydantic over dataclasses?
- [ ] **12.4.2** Write ADR: Why tiered loading?
- [ ] **12.4.3** Write ADR: Why `REF::` syntax?
- [ ] **12.4.4** Write ADR: Why immutable config?
- [ ] **12.4.5** Write ADR: Why no hot-reload?
- [ ] **12.4.6** Add ADRs to `docs/adr/`

- [ ] **12.5** Git commit: "docs: Iteration 12 - Complete documentation"

---

## 📋 Iteration 13: Cross-Language Parity Testing

- [ ] **13.1** Define parity test spec (JSON file with test cases)
- [ ] **13.2** Create `tests/parity/` directory
- [ ] **13.3** Create test case: Basic config loading
- [ ] **13.4** Create test case: Env var override
- [ ] **13.5** Create test case: Secret resolution
- [ ] **13.6** Create test case: Large value handling (16KB)
- [ ] **13.7** Write Python test runner for parity tests
- [ ] **13.8** Document parity test format
- [ ] **13.9** Git commit: "test: Iteration 13 - Parity test suite"

---

## 📋 Iteration 14: Packaging & Distribution

### 14.1: PyPI Release

- [ ] **14.1.1** Update version to `1.0.0` (SemVer)
- [ ] **14.1.2** Create `CHANGELOG.md` with all changes
- [ ] **14.1.3** Create `LICENSE` file (MIT)
- [ ] **14.1.4** Add PyPI classifiers to `pyproject.toml`
- [ ] **14.1.5** Add project URLs (homepage, issues, source)
- [ ] **14.1.6** Build wheel: `python -m build`
- [ ] **14.1.7** Test install from wheel
- [ ] **14.1.8** Create PyPI account / API token
- [ ] **14.1.9** Upload to TestPyPI first
- [ ] **14.1.10** Test install from TestPyPI
- [ ] **14.1.11** Upload to PyPI
- [ ] **14.1.12** Verify install: `pip install prism-config`

### 14.2: GitHub Release

- [ ] **14.2.1** Create Git tag: `v1.0.0`
- [ ] **14.2.2** Push tag to GitHub
- [ ] **14.2.3** Create GitHub Release
- [ ] **14.2.4** Attach wheel and sdist to release
- [ ] **14.2.5** Write release notes

### 14.3: CI/CD

- [ ] **14.3.1** Create `.github/workflows/test.yml`
- [ ] **14.3.2** Configure pytest to run on push
- [ ] **14.3.3** Configure coverage reporting
- [ ] **14.3.4** Add status badges to README
- [ ] **14.3.5** Create `.github/workflows/publish.yml`
- [ ] **14.3.6** Configure auto-publish on tag
- [ ] **14.3.7** Test CI pipeline

- [ ] **14.4** Git commit: "ci: Iteration 14 - Packaging complete"

---

## 📋 Final Checklist (Definition of Done)

- [ ] **✅ All 14 iterations complete**
- [ ] **✅ 100% test coverage**
- [ ] **✅ All property tests pass**
- [ ] **✅ All parity tests pass**
- [ ] **✅ All examples work**
- [ ] **✅ All documentation complete**
- [ ] **✅ Published to PyPI**
- [ ] **✅ CI/CD pipeline working**
- [ ] **✅ CODEX.md fully updated**
- [ ] **✅ README.md has screenshots**
- [ ] **✅ Performance benchmarks documented**
- [ ] **✅ No mypy errors (strict mode)**
- [ ] **✅ No ruff errors**
- [ ] **✅ Git tags for v1.0.0**

---

## 📊 Progress Summary

```
Total Tasks: ~300
Completed: ~70 (Iterations 1, 2, 3 + Documentation)
Remaining: ~230
Completion: 23.3%

Completed Iterations:
✅ Iteration 1: Dict Loading (19 tasks)
✅ Iteration 2: YAML File Loading (16 tasks)
✅ Iteration 3: Environment Variable Override (20 tasks)
✅ Documentation & Polish (11 tasks)

Current: ✅ Iterations 1-3 Complete + Documentation
Next: 📋 Iteration 4 - CLI Arguments Override

Test Results:
- 23 tests passing (100% pass rate)
- 94% coverage on loader.py
- 100% coverage on models.py

Git Commits:
1. 62c375a - feat: Iterations 1 & 2 - Dict and YAML file loading
2. 7834197 - feat: Iteration 3 - Environment variable override
3. 0895f62 - docs: Enhance README with ASCII logo and comprehensive documentation
```

**Last Updated:** 2025-12-03
**Library Version:** 0.1.0 (in development)
**Repository Status:** Initialized, pushed to GitHub on main branch