reorg: out/ sorted by datatype (vhack/ pools/ runs/ vhack_grads/ figs/)

Code writes+reads the new scheme; migrate_out_dirs.py moved 225 loose artifacts
(0 left at top level). Per-run checkpoints+rollouts now group under
runs/<ts>_<run_id>/ as train.safetensors/rollouts.jsonl. Figures land in
out/figs/ with a stable docs/figs/<name>.png symlink (figs.link_latest).
justfile also gains run-cell REFRESH param (online-erasure arm). Smoke +
smoke-vanilla + results all green on new paths. Requeue manifest preserves the
why/resolve labels that pueue reset wiped.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

scripts/plot_dynamics.py

@@ -45,6 +45,8 @@ import matplotlib.pyplot as plt
 import numpy as np
 from loguru import logger
 
+from projected_grpo.figs import link_latest
+
 # --- parse -----------------------------------------------------------------
 
 # Series we plot, by cleaned header name. frac "7/28" -> 0.25; float "+0.264".
@@ -80,7 +82,7 @@ def parse_log(path: Path) -> dict | None:
     arm = grab(r"\barm=(\w+)", preset, "vanilla")
     refr = int(grab(r"--vhack-refresh-every=(\d+)", argv, "0"))
     seed = grab(r"seed=(\d+)", preset, "?")
-    vhack = grab(r"v-hack-path=out/(\S+?)\.safetensors", argv, "-")
+    vhack = grab(r"v-hack-path=out/(?:vhack/)?(\S+?)\.safetensors", argv, "-")
 
     # header line: the one containing both "step" and "hack_s"
     hdr = next((l for l in txt.splitlines() if "ref_eq" in l and "hack_s" in l), None)
@@ -312,7 +314,7 @@ def _gather(paths: list[str]) -> list[Path]:
 def main() -> None:
     ap = argparse.ArgumentParser(description=__doc__)
     ap.add_argument("logs", nargs="+", help="log files, globs, or dirs")
-    ap.add_argument("--out", type=Path, default=Path("out/dynamics.png"))
+    ap.add_argument("--out", type=Path, default=Path("out/figs/dynamics.png"))
     args = ap.parse_args()
     files = _gather(args.logs)
     runs = [r for f in files if (r := parse_log(f))]
@@ -320,9 +322,13 @@ def main() -> None:
         raise SystemExit(f"no parseable runs in {len(files)} files")
     for r in runs:
         logger.info(f"{classify(r):16s} seed={r['seed']} steps={len(r['steps'])} {r['vhack']}")
+    args.out.parent.mkdir(parents=True, exist_ok=True)
     plot(runs, args.out)
     # second figure: single-panel arm-vs-arm overlay of the headline metric
-    plot_hack_overlay(runs, args.out.with_name(args.out.stem + "_hack_overlay.png"))
+    overlay = args.out.with_name(args.out.stem + "_hack_overlay.png")
+    plot_hack_overlay(runs, overlay)
+    for p in (args.out, overlay):
+        logger.info(f"docs/figs latest -> {link_latest(p)}")
 
 
 if __name__ == "__main__":