# GigLez — FABLE Development Brief
**Project**: Sub-GHz IoT RF device mapping platform (Wigle for IoT)  
**Briefed**: 2026-07-17

---

## Your Job

You are picking up active development on GigLez. Phase 0 is complete. Your job is to drive Phases 1–2 (API completion + web UI) to a state where a user can open a browser, upload a `.sub` file, and see it appear on a map. That is the MVP gate.

Read this brief fully before writing a single line of code. The project has a lot of prior work — most of what you'd think to build already exists in some form. Explore before you scaffold.

---

## Situational Awareness

### What Exists and Works

| Layer | Files | Confidence |
|-------|-------|-----------|
| `.sub` / RAW parser | `src/parser/sub_parser.py` (308 LOC) | Production-ready |
| GPS validator | `src/gps/validator.py` (22/22 tests pass) | Production-ready |
| Device matcher | `src/matcher/engine.py` → `device_identifier.py` | 67% top-3 real-world |
| Category router | `src/matcher/category_router.py` | Complete (Phase 0) |
| Protocol DB | `src/matcher/protocol_database.py` | 350+ protocols |
| DB schema | `scripts/create_schema.sql` (670 LOC, PostGIS) | Ready to init |
| ORM models | `src/database/models.py` (11 tables) | Complete |
| Storage backends | `src/core/storage/` (FS + S3) | Complete |
| Config system | `config/settings.py` | Dev/prod aware |

### What's Skeleton Only (Needs You)

| Layer | Files | Gap |
|-------|-------|-----|
| Upload endpoint | `src/api/routes/captures.py` | 60 LOC of boilerplate, never completed |
| Search endpoint | `src/api/routes/query.py` | 4-line stub |
| Stats endpoint | `src/api/routes/stats.py` | 3-line stub |
| Devices endpoint | `src/api/routes/devices.py` | 5-line stub |
| FastAPI app | `src/api/main_simple.py` | Uses MockDB, old strategies |
| Web UI | `templates/`, `static/js/` | Empty structures |
| Auth | `src/api/dependencies.py` | `optional_auth` stub exists |

### Duplicate/Dead Files — Ignore These

- `src/api/main_orm_legacy.py` — superseded
- `src/api/routes/captures_enhanced.py` — superseded by `captures.py`
- `src/api/routes/captures_with_logging.py` — superseded
- `src/matcher/strategies.py` — legacy fallback, don't extend

---

## Architecture Snapshot

```
Browser / CLI client
        │
        ▼
FastAPI (src/api/main_simple.py → currently MockDB mode)
        │
        ├── POST /api/v1/captures/upload
        │       → parse_sub_file() → validate_gps() → matcher.match() → db.store()
        │
        ├── GET  /api/v1/search?bbox=...&freq=...&category=...
        │       → PostGIS ST_Within → returns GeoJSON
        │
        ├── GET  /api/v1/heatmap
        │       → materialized view capture_heatmap → grid densities
        │
        ├── GET  /api/v1/stats
        │       → materialized view device_statistics
        │
        └── GET  /api/v1/devices
                → known device catalog

Database: PostgreSQL + PostGIS
  Schema at: scripts/create_schema.sql
  Dev: SQLite fallback acceptable for MVP
  Prod: PostgreSQL required

Storage: src/core/storage/factory.py
  Dev:  STORAGE_BACKEND=filesystem (local ./data/uploads/)
  Prod: STORAGE_BACKEND=s3
```

---

## Phase 1: Complete the Backend API

**Goal**: `POST /api/v1/captures/upload` → stored in DB → returns match results.

### 1.1 Reconcile the FastAPI entry point

`src/api/main_simple.py` currently uses `MockDB` and imports the old strategy classes. You need to:
- Replace `MockDB` with the real DB session from `config/database.py`
- Wire in the proper router pattern
- Make the app runnable in "no-DB" dev mode (SQLite or in-memory) so you don't block on PostgreSQL setup
- Keep the existing `/docs` and `/redoc` endpoints

**Dev mode fallback**: If `DATABASE_URL` is not set, use `sqlite:///./giglez.db` (already exists at project root from prior testing). The ORM models already use SQLAlchemy 2.0, so this is a connection string swap.

### 1.2 Complete `POST /api/v1/captures/upload`

The skeleton is at `src/api/routes/captures.py:29`. It has the right shape — manifest parsing, file hashing — but never stores or matches. Complete it:

```
receive multipart (manifest JSON + .sub files)
    → validate manifest schema (pydantic)
    → for each file:
        sha256 = hash(bytes)
        check duplicate (Capture.file_hash in db) → skip if exists
        metadata = parse_sub_file(tmp_path)
        gps = validate_gps_coordinates(lat, lon, accuracy)
        matches = SignatureMatcher().match(metadata, max_results=5)
        file_url = storage.save(sha256, bytes)
        db.add(Capture(...))
        db.add_all([CaptureMatch(...) for top 3 matches])
    → return {
        processed: int,
        skipped_duplicates: int,
        captures: [{id, lat, lon, matches: [{device, confidence, category}]}]
      }
```

Use `SignatureMatcher` from `src/matcher/engine.py`, not the old strategies.

### 1.3 Complete `GET /api/v1/search`

```python
@router.get("/search")
async def search_captures(
    lat: float, lon: float, radius_km: float = 1.0,
    frequency_min: Optional[int] = None,
    frequency_max: Optional[int] = None,
    category: Optional[str] = None,
    limit: int = 100,
    db: Session = Depends(get_db),
):
    # PostGIS: ST_DWithin(geometry, ST_SetSRID(ST_MakePoint(lon, lat), 4326), radius_m)
    # Return GeoJSON FeatureCollection for Leaflet
```

For the SQLite dev fallback, do a simple lat/lon bounding box (haversine already in `src/gps/validator.py`).

### 1.4 Complete `GET /api/v1/stats` and `GET /api/v1/devices`

Stats: total captures, unique device types, geographic coverage (distinct countries/cities), top 5 protocols.  
Devices: paginated list of known device types with capture counts.

### 1.5 Auth middleware

`src/api/dependencies.py` has `optional_auth` stub. For MVP:
- Anonymous uploads: allowed, rate-limited by IP (use `slowapi` or simple in-memory counter)
- API key (optional): `X-API-Key` header, stored in `users.api_key` column
- No JWT yet — defer to Phase 5

---

## Phase 2: Web UI MVP

**Goal**: User opens browser → sees map → drags `.sub` file → sees it appear as a marker.

Approach: Jinja2 templates + Leaflet.js via CDN. No build step. No framework. Vanilla JS.

### 2.1 Templates needed

```
templates/
├── base.html       ← nav, CDN links (Leaflet 1.9, Tailwind CDN, htmx 1.9)
├── index.html      ← landing: stats summary + recent 10 captures on mini-map
├── map.html        ← full-screen Leaflet map + filter sidebar
└── upload.html     ← drag-and-drop upload form
```

Use **htmx** for the upload form — it makes multipart upload + response handling trivial without writing JS. The upload endpoint returns partial HTML with match results that htmx swaps in.

### 2.2 Leaflet map (map.html)

```javascript
const map = L.map('map').setView([39.5, -98.35], 4);  // USA center
L.tileLayer('https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png').addTo(map);

// Marker cluster
const markers = L.markerClusterGroup();

// Load from API
fetch('/api/v1/search?lat=39.5&lon=-98.35&radius_km=5000')
  .then(r => r.json())
  .then(geojson => {
    L.geoJSON(geojson, {
      onEachFeature: (feature, layer) => {
        layer.bindPopup(`
          <b>${feature.properties.device_name}</b><br>
          ${feature.properties.frequency_mhz} MHz<br>
          ${feature.properties.category}<br>
          Confidence: ${feature.properties.confidence}%
        `);
      }
    }).addTo(markers);
    map.addLayer(markers);
  });
```

CDN links needed:
- `https://unpkg.com/leaflet@1.9.4/dist/leaflet.css`
- `https://unpkg.com/leaflet@1.9.4/dist/leaflet.js`
- `https://unpkg.com/leaflet.markercluster@1.5.3/dist/MarkerCluster.css`
- `https://unpkg.com/leaflet.markercluster@1.5.3/dist/leaflet.markercluster.js`
- `https://cdn.tailwindcss.com`
- `https://unpkg.com/htmx.org@1.9.10`

### 2.3 Upload form (upload.html)

```html
<form hx-post="/api/v1/captures/upload"
      hx-encoding="multipart/form-data"
      hx-target="#results"
      hx-swap="innerHTML">
  <input type="hidden" name="manifest" id="manifest-json">
  <input type="file" name="files" multiple accept=".sub">
  <!-- GPS inputs with "Use my location" button -->
  <input name="latitude" placeholder="Latitude">
  <input name="longitude" placeholder="Longitude">
  <button>Upload</button>
</form>
<div id="results"></div>
```

The upload endpoint should return an HTML partial (not JSON) when `Accept: text/html` — show matches as cards.

---

## Key Technical Constraints

1. **Don't touch `src/matcher/`** except to import from it. The Phase 0 accuracy work is complete. The only valid change is importing the new `SignatureMatcher` in the API.

2. **Don't add Redis yet**. Rate limiting can be in-memory dict for MVP. Redis is Phase 4.

3. **No JWT yet**. API key + anonymous is sufficient for MVP.

4. **SQLite dev mode is mandatory**. Not everyone has PostgreSQL running. The app must start with `uvicorn src.api.main:app --reload` and work without any external services.

5. **Don't create `requirements.txt` additions unless strictly necessary**. Everything needed is already installed: fastapi, uvicorn, sqlalchemy, jinja2, pydantic, loguru, numpy, scipy, scikit-learn, geopy.

6. **`htmx`** for the upload form only — don't add it to the map page. Leaflet is sufficient there.

---

## How to Run / Test

```bash
# From project root
cd /home/dell/coding/security/giglez

# Dev server (SQLite, no DB setup needed)
DATABASE_URL=sqlite:///./giglez.db uvicorn src.api.main:app --reload

# Run existing tests
python3 -m pytest tests/unit/ -q

# Phase 0 accuracy benchmark
python3 scripts/benchmark_phase0.py

# Quick matcher smoke test
python3 -c "
from src.matcher.engine import SignatureMatcher
from src.parser.sub_parser import parse_sub_file
# ... test with a .sub file from signatures/t-embed-rf/
"
```

---

## How to Use Your Capabilities Here

You are FABLE — Opus 4.6, the most capable model in the Claude lineup. Use that accordingly:

**Parallelize ruthlessly.** Phase 1 API routes and Phase 2 templates are independent. Use the Agent tool to run them simultaneously: one subagent completing all 4 API routes while another writes the 4 templates. You should be orchestrating, not writing every line sequentially yourself.

**Make architectural calls, don't ask.** If you see a better pattern than what's described here — use it. The constraints above are floors, not ceilings. If you see a cleaner way to structure the upload response, ship it.

**Read before writing.** Before touching any file, read it. The project has multiple versions of things (captures.py, captures_enhanced.py, captures_with_logging.py). The right one is `captures.py`. Read the 60 existing lines before adding to them.

**Fix the right thing.** The upload endpoint is the #1 priority. If you complete nothing else, complete `POST /api/v1/captures/upload` end-to-end with a working SQLite fallback. A user being able to upload and get match results back is the first tangible milestone.

**The map is the moat.** The moment captures appear as markers on a Leaflet map is when GigLez becomes a real product rather than a Python library. Prioritize that moment.

---

## Success Criteria

| Milestone | Criteria |
|-----------|----------|
| Phase 1 done | `curl -X POST .../captures/upload -F manifest=... -F files=@test.sub` returns match JSON |
| Phase 2 done | `http://localhost:8000/map` shows markers for uploaded captures |
| MVP gate | Both above, running on SQLite, no PostgreSQL required |

---

## Related Files to Read First

```
PLAN_TO_PROD.md              ← Full production roadmap
REAL_TEST_RESULTS.md         ← Baseline accuracy data (before Phase 0)
src/api/main_simple.py       ← Current FastAPI entry point
src/api/routes/captures.py   ← Upload endpoint skeleton
src/api/dependencies.py      ← Auth + DB dependency stubs
src/database/models.py       ← All ORM models
config/settings.py           ← Environment-aware settings
config/database.py           ← DB connection management
scripts/create_schema.sql    ← PostgreSQL schema (reference)
.env.development             ← Dev environment template
```

---

*Last updated: 2026-07-17 after Phase 0 completion (0% → 67% top-3 real-world accuracy).*
