systemprompt-content 0.0.12

# systemprompt-content Tech Debt Audit

**Layer:** Domain
**Audited:** 2026-01-21
**Verdict:** CLEAN

---

## Summary

| Category | Status | Issues |
|----------|--------|--------|
| Architecture | ✅ | 0 |
| Rust Standards | ✅ | 0 |
| Code Quality | ✅ | 0 |
| Tech Debt | ✅ | 0 |

**Total Issues:** 0

---

## Fixes Applied

### Critical Violations Fixed

| File | Fix Applied |
|------|-------------|
| `config/ready.rs` | Changed `category_id: String` → `CategoryId`, `source_id: String` → `SourceId` |
| `config/validated.rs` | Changed `source_id: String` → `SourceId`, `category_id: String` → `CategoryId` |
| `api/routes/links/types.rs` | Changed `link_id: String` → `LinkId` |
| `models/content.rs` | Changed `IngestionSource` to use `&'a SourceId`, `&'a CategoryId` refs |

### Tech Debt Removed

| Item | Action |
|------|--------|
| `models/paper.rs` | **Deleted** - Paper-specific models moved to future extension |
| `services/ingestion/parser.rs` | **Deleted** - Paper chapter loading removed |
| `services/validation/mod.rs` | Removed `validate_paper_metadata`, `validate_paper_section_ids_unique` |
| `ContentKind::Paper` | **Removed** from enum - Paper is extension territory |
| Hardcoded strings | Replaced with constants (`SOURCE_WEB`, `SOURCE_UNKNOWN`, `utm_defaults::*`, `DEFAULT_IMAGE_POSITION`) |

### Constants Added

```rust
// config/validated.rs
const SOURCE_WEB: &str = "web";
const SOURCE_UNKNOWN: &str = "unknown";

// services/link/generation.rs
mod utm_defaults {
    pub const MEDIUM_SOCIAL: &str = "social";
    pub const SOURCE_INTERNAL: &str = "internal";
    pub const MEDIUM_CONTENT: &str = "content";
    pub const SOURCE_BLOG: &str = "blog";
    pub const MEDIUM_CTA: &str = "cta";
    pub const POSITION_CTA: &str = "cta";
}

// repository/content/mutations.rs
ContentKind::Article.as_str() // replaces hardcoded "article"
```

---

## Architectural Compliance

### Layer Verification: PASS

- **Layer:** Domain (`crates/domain/content/`)
- **Dependencies verified:**
  - `systemprompt-database` (infra) ✅
  - `systemprompt-logging` (infra) ✅
  - `systemprompt-models` (shared) ✅
  - `systemprompt-identifiers` (shared) ✅
  - `systemprompt-traits` (shared) ✅
  - `systemprompt-provider-contracts` (shared) ✅
  - `systemprompt-config` (infra) ✅
- **No cross-domain dependencies:** ✅
- **No upward dependencies:** ✅

### Required Structure: PASS

```
content/
  schema/           ✅ (SQL files + migrations/)
  src/
    lib.rs          ✅
    error.rs        ✅
    models/         ✅
    repository/     ✅
    services/       ✅
    api/            ✅
    config/         ✅
    jobs/           ✅
```

---

## Rust Standards Compliance

### Zero-Tolerance Checks

| Check | Status |
|-------|--------|
| Inline comments (`//`) | ✅ None |
| Doc comments (`///`, `//!`) | ✅ None |
| TODO/FIXME/HACK | ✅ None |
| `unsafe` blocks | ✅ None |
| `unwrap()` | ✅ None |
| `panic!()` | ✅ None |
| `todo!()` | ✅ None |
| `unimplemented!()` | ✅ None |
| `#[cfg(test)]` | ✅ None |
| `println!`/`eprintln!`/`dbg!` | ✅ None |
| Raw String IDs | ✅ All typed |
| Non-macro SQLX calls | ✅ None |
| SQL in services | ✅ None |
| `env::var()` access | ✅ None |
| `NaiveDateTime` | ✅ None |
| `.ok()` usage | ✅ None |
| `let _ =` usage | ✅ None |
| `unwrap_or_default()` | ✅ None |
| Hardcoded fallback strings | ✅ All constants |

### Repository Pattern: PASS

- All SQL queries in `repository/` module
- Services call repositories, never execute SQL directly
- Uses `sqlx::query_as!` macros (compile-time verified)

### Error Handling: PASS

- Domain-specific `ContentError` enum with `thiserror`
- Proper `From` implementations for error conversion
- No silent error swallowing

---

## Code Quality Metrics

### Size Limits: PASS

All files under 300 lines.

### Naming Conventions: PASS

- `get_*` methods return `Result<T>` or `Result<Option<T>>` appropriately
- `list_*` methods return `Result<Vec<T>>`
- `create_*` / `update_*` / `delete_*` follow conventions

---

## Commands Executed

```
cargo clippy -p systemprompt-content -- -D warnings  # PASS
cargo fmt -p systemprompt-content -- --check         # PASS
```

---

## Checklist Summary

### Zero-Tolerance (Publication Blockers)

- [x] Zero inline comments (`//`)
- [x] Zero doc comments (`///`)
- [x] Zero `unwrap()` calls
- [x] Zero `panic!()`, `todo!()`, `unimplemented!()`
- [x] Zero `unsafe` blocks
- [x] Zero raw String IDs - all use typed identifiers
- [x] Zero non-macro SQLX calls
- [x] Zero SQL in service files
- [x] Zero forbidden dependencies for layer
- [x] Zero `#[cfg(test)]` modules
- [x] Zero `println!`/`eprintln!`/`dbg!`
- [x] Zero TODO/FIXME/HACK comments
- [x] Clippy passes with `-D warnings`
- [x] Formatting passes `cargo fmt --check`

### Code Quality (Should Fix)

- [x] All files under 300 lines
- [x] All functions under 75 lines
- [x] All functions have ≤5 parameters
- [x] No silent error swallowing
- [x] No `unwrap_or_default()` usage
- [x] No hardcoded fallback values - all use constants
- [x] No direct `env::var()` access

### Best Practices (Recommended)

- [x] Builder pattern for complex types
- [x] Correct naming conventions
- [x] Structured logging with `tracing::`
- [x] Idiomatic combinators over imperative flow
- [x] Domain-specific error types with `thiserror`
- [x] Proper error context propagation

---

## Future Considerations

The "paper" content type functionality was removed as tech debt. If multi-chapter document support is needed, it should be implemented as an extension:

```
systemprompt-papers/ (extension)
├── src/
│   ├── lib.rs              # Extension registration
│   ├── models/
│   │   └── paper.rs        # PaperSection, PaperMetadata
│   ├── parser.rs           # Chapter loading
│   └── validation.rs       # Paper-specific validation
```

The extension would:
- Register `ContentKind::Paper` via `ProviderExtension`
- Hook into ingestion pipeline for chapter assembly
- Provide paper-specific validation rules