# Conflict Checker

Cross-discipline **design contradiction** detector for construction drawing sets.
Built for architects to back-check a set (Arch / Struct / Mech / Elec / Plumb / FP / …)
**before** it goes out to a GC for bid. It flags information that *disagrees between
disciplines* — e.g. the RCP ceiling height vs the mechanical duct elevation, a door
schedule count vs the floor plan, a column that lands in a corridor.

> This is **not** the IronBid scope-ownership conflict checker (who-owns-what for bidding).
> That stays in IronBid; this tool is a separate, design-QA pipeline.

## How it works (hybrid extract-then-compare)

```
PDF  ->  page images  ->  per-sheet grounded facts  ->  cluster by location  ->  reason  ->  report
        Stage 0           Stage 1 (vision)             Stage 2 (no LLM)        Stage 3      Stage 4
```

1. **Stage 0** `pdf_processor` — PDF pages to base64 JPEGs (100 DPI, 2400px cap).
2. **Stage 1** `extractor` — one vision call per sheet extracts discrete, **grounded**
   assertions (each carries verbatim `source_text` and a `location_key`). A grounding
   guard drops any assertion whose number isn't in its own source text.
3. **Stage 2** `clusterer` — deterministic: groups assertions that refer to the same
   grid / room / tag across **≥2 disciplines** (or a schedule-vs-plan within one). This
   keeps Stage 3 calls small and few.
4. **Stage 3** `conflict_checker` — one reasoning call per cluster (with the relevant
   sheet images) decides whether the disciplines genuinely contradict, and classifies it.
5. **Stage 4** `report` — `conflicts.json` + a readable `report.md`.

The model is **`google/gemini-2.5-pro`** via OpenRouter (configurable). **All prompt
tuning lives in `backend/prompts.py`** — the system prompts, the attribute vocabulary,
and the conflict taxonomy.

## Setup

### Docker (recommended)

```bash
cp backend/.env.example backend/.env   # set AI_API_KEY (and SMTP if you want email)
docker compose up -d --build
# -> http://localhost:8099
```

Check health: `curl http://localhost:8099/health`

Logs: `docker compose logs -f app`

CLI inside the container (mount your PDF read-only):

```bash
docker compose run --rm \
  -v "$(pwd)/samples/your_set.pdf:/data/set.pdf:ro" \
  app python cli/run_check.py /data/set.pdf --out /app/backend/outputs/cli-run
```

Persistent data lives in Docker volumes (`uploads`, `outputs`, `llm_cache`). To bind
mount host directories instead, replace the named volumes in `docker-compose.yml`.

For hybrid mode (local vLLM on the host), set `LOCAL_BASE_URL=http://host.docker.internal:8000/v1`
in `backend/.env`. Compose already maps `host.docker.internal` to the host gateway on Linux.

### Local Python

```bash
python3 -m venv .venv && . .venv/bin/activate
pip install -r requirements.txt          # needs system poppler-utils for pdf2image
cp backend/.env.example backend/.env      # then set AI_API_KEY to your OpenRouter key
```

## Repository (Gitea)

Source of truth is Scout IT's Gitea instance:

| | |
|---|---|
| **Remote** | `https://gitea.scoutitsystems.com/woogi/Conflict_Checker.git` |
| **Web UI** | https://gitea.scoutitsystems.com/woogi/Conflict_Checker |

Clone:

```bash
git clone https://gitea.scoutitsystems.com/woogi/Conflict_Checker.git
cd Conflict_Checker
```

This repo's git config uses a dedicated credential store at
`~/.config/git/gitea-credentials` (not your global GitHub credentials). If push/pull
prompts for auth, log in via the Gitea web UI and create a personal access token, then
store it there or run one authenticated push so the helper saves it.

## CI/CD (Gitea Actions → Container Registry)

Develop locally, push to Gitea, and let a runner build/publish the Docker image.

### One-time setup

1. **Enable Actions** on the repo: Settings → Actions → Enable Repository Actions.
2. **Runner** — an `act_runner` registered against `gitea.scoutitsystems.com`
   with the `self-hosted` label and access to a Docker daemon (typically
   `/var/run/docker.sock` mounted into the runner). This instance uses
   `sits-docker-runner` (`self-hosted`, `linux`, `docker`).
3. **Registry secret** — create a Personal Access Token on Gitea with at least
   `write:package` (and `write:release` if you use version tags). Add it as a
   repository secret named **`REGISTRY_TOKEN`** (Settings → Actions → Secrets).

### What runs automatically

| Trigger | Result |
|---------|--------|
| Push to `main` | Image pushed as `:latest` and `:sha-<commit>` |
| Push tag `v*` (e.g. `v0.1.0`) | Image tagged with the release + Gitea Release created |

Image location:

```text
gitea.scoutitsystems.com/woogi/conflict-checker:<tag>
```

Workflow file: `.gitea/workflows/docker-release.yml`

### Local dev → deploy loop

```bash
# 1. Develop and test locally (venv or docker compose build)
git add -A && git commit -m "your change"
git push origin main          # CI builds :latest

# 2. Cut a release when ready
git tag v0.1.0 && git push origin v0.1.0

# 3. On the deploy host — pull and run the published image
docker login gitea.scoutitsystems.com
IMAGE_TAG=v0.1.0 docker compose -f docker-compose.prod.yml up -d
# or: IMAGE_TAG=latest for the newest main-branch build
```

Copy `backend/.env` to the deploy host separately (never commit it). Use
`docker-compose.prod.yml` for production; keep `docker-compose.yml` for local
builds from source.

## Run

CLI (the fast tuning loop — also dumps `assertions.json` / `clusters.json` for inspection):

```bash
python cli/run_check.py samples/your_set.pdf --out out/your_set
# -> out/your_set/report.md  +  conflicts.json
```

Web UI (upload + view):

```bash
uvicorn backend.main:app --reload --port 8099   # open http://127.0.0.1:8099
```

Or use Docker: `docker compose up -d` (see **Setup** above).

## Conflict categories

`dimensional_disagreement`, `elevation_disagreement`, `location_mismatch`,
`missing_element`, `schedule_vs_plan_mismatch`, `tag_or_reference_inconsistency`,
`spatial_clash`, `note_or_spec_contradiction`.

## Tuning

- Edit prompts/vocab/taxonomy in `backend/prompts.py`.
- Inspect `out/<set>/assertions.json` to see what Stage 1 extracted, and
  `out/<set>/clusters.json` to see what got compared. Most false negatives are a
  clustering/extraction miss; most false positives are a Stage-3 prompt issue.
- Build a golden set: hand-verify `conflicts.json` for a known set and diff future runs.

## Known limitations (v1)

- A location appearing in only **one** discipline never forms a cluster, so pure
  "missing element" gaps aren't caught deterministically (Stage 3 still catches missing
  counterparts when the location is co-located).
- Stage 3 currently sends **full pages**, not crops. If accuracy/cost needs it, add
  crop-by-grid later.