Add AGENTS and codex project conventions

codex/SESSION_START.md

@@ -0,0 +1,47 @@
+# Session Start
+
+When opening this project again, do this first:
+
+1. Read [`STEP_RECORD.md`](/root/sourceserver/pbf/STEP_RECORD.md).
+2. Read [`AGENTS.md`](/root/sourceserver/pbf/AGENTS.md).
+3. Run:
+
+```bash
+cd /root/sourceserver/pbf
+git status --short --branch
+git remote -v
+sed -n '1,220p' STEP_RECORD.md
+```
+
+## Current Resume Target
+
+Unless a newer step record says otherwise, continue from:
+
+- `Karatsu 10nm delivery` audit follow-up
+- priority groups:
+  - `baseline`
+  - `depth / bathymetry`
+  - `navigation marks`
+
+## Audit Reminder
+
+The current trusted delivery audit line is:
+
+```bash
+.venv/bin/python navsea_render_audit.py \
+  --audit-name navsea_original_vs_delivery_karatsu_10nm_20260331 \
+  --comparison-label 'delivery版' \
+  --fid-key 'thisMyWorld@2026' \
+  --match-on-fid-only \
+  --original-style /root/sourceserver/pbf/src/pbf/style.json \
+  --engineering-style /root/sourceserver/pbf/src/pbf/style.navsea-delivery-karatsu-10nm.json \
+  --original-tile-root /home/wwwroot/newpec/exported_auto/tile.mapple-on.jp__newpec-mvt-20260106__z___x___y_.pbf/tiles \
+  --engineering-tile-root /home/wwwroot/pbf-delivery-karatsu-10nm \
+  --report-md /root/sourceserver/pbf/NavSea_Original_vs_Delivery_Render_Audit_Karatsu_10nm_2026-03-31.md \
+  --report-json /root/sourceserver/pbf/NavSea_Original_vs_Delivery_Render_Audit_Karatsu_10nm_2026-03-31.json \
+  --skip-db-persist
+```
+
+## Stop Rule
+
+Before ending a work session, update [`STEP_RECORD.md`](/root/sourceserver/pbf/STEP_RECORD.md).