data/runs/: commit run metadata; gitignore bulky JSONL/PNG payloads

* data/runs/README.md explains the data layout + how to re-create
* Commits _summary.json + _invocation.json for each paper-v1 run
* .gitignore excludes the bulky *.jsonl / *.png / .logs/ so they
don't bloat the repo on push.

.gitignore

@@ -8,3 +8,11 @@ build/
 *.orarep
 flagged/
 submissions/
+
+# Heavy paper-v1 payloads: per-turn obs + minimap base64 JSONLs
+# (commit the _summary.json + _invocation.json only)
+data/runs/paper-v1-**/*.jsonl
+data/runs/paper-v1-**/*.partial
+data/runs/paper-v1-**/*.png
+data/runs/paper-v1-**/.logs/
+data/runs/_archive_*/

data/runs/README.md

@@ -0,0 +1,28 @@
+# `data/runs/` — Phase 4 paper data
+
+This directory holds the per-run JSONL + per-turn PNG output of
+`scripts/collect_eval_data.py`. JSONLs can be hundreds of MB per
+run (full untruncated obs + system prompt + model request +
+response per turn, plus minimap base64); PNGs are ~150 KB each.
+
+**Heavy payloads (`*.jsonl`, `*.png`) are intentionally NOT
+committed** to keep the repo lean. The summary metadata
+(`_summary.json`, `_invocation.json`) IS committed — it records
+what cells were run, how long they took, and where the JSONL
+files live locally.
+
+To re-create the data: rerun the same `scripts/collect_eval_data.py`
+invocation; `--resume` will skip any cells whose JSONL still has
+a `terminal:` line locally.
+
+## Runs in this session
+
+- `_smoke_16cell/` — 16-cell plumbing verification (Qwen3.5-9B)
+- `paper-v1-engine-feature-packs/` — main collection (12 packs × 2
+  levels × 2 seeds × 5 models; in flight, ~69 cells captured of
+  240 planned at session checkpoint)
+- `paper-v1-plus-medium/` — Qwen3.6-Plus F1-scale-test (8/8)
+- `paper-v1-gemma-medium/` — gemma-4-31B-it F1-cross-model
+  control (5/6 in flight)
+- `_archive_flash-gemma-orphan/` — orphaned cells from an early
+  flash run that errored; kept for audit reference