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Common Workflows

1. Daily development loop

git pull && .venv/Scripts/Activate.ps1        # Windows dev
nexus test --mode quick                        # fast sanity
# ... edit ...
pytest tests/unit -q -k "70 or schema"         # targeted suite
./beforePush.ps1 -SkipPush                     # full gate before pushing

2. Evaluate the engine on real data (risk-free)

nexus start --mode shadow      # live feed, zero order authority
# observe Control Center → SHADOW section: disagreement analysis, drift, health
nexus stop

3. Research a candidate

nexus model-dataset-build      # canonical dataset (fingerprinted)
nexus model-experiment-create  # fair A/B/C protocol
nexus model-train              # deterministic, seeded
nexus model-validate           # walk-forward + OOS gate + robustness
nexus model-replay             # bit-exact parity proof

Anything that fails the OOS gate is REJECTED — that is the system working.

4. Read the evidence

nexus forensic — health engine verdicts
nexus incidents list — correlated incidents
Control Center → Debug Hub — /api/debug/state snapshot (18 sections)
artifacts/forensics/, artifacts/validation/ — machine-readable evidence

5. Update the installation

nexus update check → download → install → verify
nexus rollback                 # if a release misbehaves

6. Database care

nexus db hygiene status        # what would be cleaned
nexus db hygiene run --dry-run --deep
nexus db migrate               # additive migrations

7. Docker

docker compose up -d --build   # PAPER mode; :9090; /health readiness