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Cannot load the dataset split (in streaming mode) to extract the first rows.
Error code:   StreamingRowsError
Exception:    CastError
Message:      Couldn't cast
id: string
bucket: string
L: int64
format: string
r5er_120b_elt7_r01_u00: struct<cell: string, replicate: string, shard: string, genseed: int64, flags: string, case_select: s (... 59 chars omitted)
  child 0, cell: string
  child 1, replicate: string
  child 2, shard: string
  child 3, genseed: int64
  child 4, flags: string
  child 5, case_select: string
  child 6, elite: int64
  child 7, label_trust: int64
  child 8, trace_exec: int64
r5er_120b_elt7_r00_u01: struct<cell: string, replicate: string, shard: string, genseed: int64, flags: string, case_select: s (... 59 chars omitted)
  child 0, cell: string
  child 1, replicate: string
  child 2, shard: string
  child 3, genseed: int64
  child 4, flags: string
  child 5, case_select: string
  child 6, elite: int64
  child 7, label_trust: int64
  child 8, trace_exec: int64
r5er_120b_mc7_r01_u00: struct<cell: string, replicate: string, shard: string, genseed: int64, flags: string, case_select: s (... 59 chars omitted)
  child 0, cell: string
  child 1, replicate: string
  child 2, shard: string
  child 3, genseed: int64
  child 4, flags: string
  child 5, case_select: string
  child 6, elite: int64
  child 7, label_trust: int64
  child 8, trace_exec: int64
r5er_120b_elt7_r02_u00: struct<cell: string, replicate: string, shard: string, genseed: int64, flags: string, case_select: s (... 59 chars omitted)
  child 0, cell: string
  child 1, replicate: string
  child 2, shard: string
  child 3, genseed: int64
  child 4, flags: string
 
...
g, shard: string, genseed: int64, flags: string, case_select: s (... 59 chars omitted)
  child 0, cell: string
  child 1, replicate: string
  child 2, shard: string
  child 3, genseed: int64
  child 4, flags: string
  child 5, case_select: string
  child 6, elite: int64
  child 7, label_trust: int64
  child 8, trace_exec: int64
r5er_120b_elt7_r01_u01: struct<cell: string, replicate: string, shard: string, genseed: int64, flags: string, case_select: s (... 59 chars omitted)
  child 0, cell: string
  child 1, replicate: string
  child 2, shard: string
  child 3, genseed: int64
  child 4, flags: string
  child 5, case_select: string
  child 6, elite: int64
  child 7, label_trust: int64
  child 8, trace_exec: int64
r5er_120b_mc7_r02_u00: struct<cell: string, replicate: string, shard: string, genseed: int64, flags: string, case_select: s (... 59 chars omitted)
  child 0, cell: string
  child 1, replicate: string
  child 2, shard: string
  child 3, genseed: int64
  child 4, flags: string
  child 5, case_select: string
  child 6, elite: int64
  child 7, label_trust: int64
  child 8, trace_exec: int64
r5er_120b_ht7_r02_u01: struct<cell: string, replicate: string, shard: string, genseed: int64, flags: string, case_select: s (... 59 chars omitted)
  child 0, cell: string
  child 1, replicate: string
  child 2, shard: string
  child 3, genseed: int64
  child 4, flags: string
  child 5, case_select: string
  child 6, elite: int64
  child 7, label_trust: int64
  child 8, trace_exec: int64
to
{'r5er_120b_elt7_r00_u00': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('string'), 'genseed': Value('int64'), 'flags': Value('string'), 'case_select': Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}, 'r5er_120b_elt7_r00_u01': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('string'), 'genseed': Value('int64'), 'flags': Value('string'), 'case_select': Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}, 'r5er_120b_elt7_r01_u00': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('string'), 'genseed': Value('int64'), 'flags': Value('string'), 'case_select': Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}, 'r5er_120b_elt7_r01_u01': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('string'), 'genseed': Value('int64'), 'flags': Value('string'), 'case_select': Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}, 'r5er_120b_elt7_r02_u00': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('string'), 'genseed': Value('int64'), 'flags': Value('string'), 'case_select': Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}, 'r5er_120b_elt7_r02_u01': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('s
...
: Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}, 'r5er_120b_mc7_r00_u01': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('string'), 'genseed': Value('int64'), 'flags': Value('string'), 'case_select': Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}, 'r5er_120b_mc7_r01_u00': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('string'), 'genseed': Value('int64'), 'flags': Value('string'), 'case_select': Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}, 'r5er_120b_mc7_r01_u01': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('string'), 'genseed': Value('int64'), 'flags': Value('string'), 'case_select': Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}, 'r5er_120b_mc7_r02_u00': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('string'), 'genseed': Value('int64'), 'flags': Value('string'), 'case_select': Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}, 'r5er_120b_mc7_r02_u01': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('string'), 'genseed': Value('int64'), 'flags': Value('string'), 'case_select': Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}}
because column names don't match
Traceback:    Traceback (most recent call last):
                File "/src/services/worker/src/worker/utils.py", line 147, in get_rows_or_raise
                  return get_rows(
                      dataset=dataset,
                  ...<4 lines>...
                      column_names=column_names,
                  )
                File "/src/libs/libcommon/src/libcommon/utils.py", line 272, in decorator
                  return func(*args, **kwargs)
                File "/src/services/worker/src/worker/utils.py", line 127, in get_rows
                  rows_plus_one = list(itertools.islice(safe_iter(ds, dataset=dataset), rows_max_number + 1))
                File "/src/services/worker/src/worker/utils.py", line 483, in safe_iter
                  yield from ds.decode(False) if ds.features else ds
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2840, in __iter__
                  for key, example in ex_iterable:
                                      ^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2373, in __iter__
                  for key, pa_table in self._iter_arrow():
                                       ~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 2398, in _iter_arrow
                  for key, pa_table in self.ex_iterable._iter_arrow():
                                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 536, in _iter_arrow
                  for key, pa_table in iterator:
                                       ^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/iterable_dataset.py", line 419, in _iter_arrow
                  for key, pa_table in self.generate_tables_fn(**gen_kwags):
                                       ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 343, in _generate_tables
                  self._cast_table(pa_table, json_field_paths=json_field_paths),
                  ~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/datasets/packaged_modules/json/json.py", line 132, in _cast_table
                  pa_table = table_cast(pa_table, self.info.features.arrow_schema)
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2378, in table_cast
                  return cast_table_to_schema(table, schema)
                File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2306, in cast_table_to_schema
                  raise CastError(
                  ...<3 lines>...
                  )
              datasets.table.CastError: Couldn't cast
              id: string
              bucket: string
              L: int64
              format: string
              r5er_120b_elt7_r01_u00: struct<cell: string, replicate: string, shard: string, genseed: int64, flags: string, case_select: s (... 59 chars omitted)
                child 0, cell: string
                child 1, replicate: string
                child 2, shard: string
                child 3, genseed: int64
                child 4, flags: string
                child 5, case_select: string
                child 6, elite: int64
                child 7, label_trust: int64
                child 8, trace_exec: int64
              r5er_120b_elt7_r00_u01: struct<cell: string, replicate: string, shard: string, genseed: int64, flags: string, case_select: s (... 59 chars omitted)
                child 0, cell: string
                child 1, replicate: string
                child 2, shard: string
                child 3, genseed: int64
                child 4, flags: string
                child 5, case_select: string
                child 6, elite: int64
                child 7, label_trust: int64
                child 8, trace_exec: int64
              r5er_120b_mc7_r01_u00: struct<cell: string, replicate: string, shard: string, genseed: int64, flags: string, case_select: s (... 59 chars omitted)
                child 0, cell: string
                child 1, replicate: string
                child 2, shard: string
                child 3, genseed: int64
                child 4, flags: string
                child 5, case_select: string
                child 6, elite: int64
                child 7, label_trust: int64
                child 8, trace_exec: int64
              r5er_120b_elt7_r02_u00: struct<cell: string, replicate: string, shard: string, genseed: int64, flags: string, case_select: s (... 59 chars omitted)
                child 0, cell: string
                child 1, replicate: string
                child 2, shard: string
                child 3, genseed: int64
                child 4, flags: string
               
              ...
              g, shard: string, genseed: int64, flags: string, case_select: s (... 59 chars omitted)
                child 0, cell: string
                child 1, replicate: string
                child 2, shard: string
                child 3, genseed: int64
                child 4, flags: string
                child 5, case_select: string
                child 6, elite: int64
                child 7, label_trust: int64
                child 8, trace_exec: int64
              r5er_120b_elt7_r01_u01: struct<cell: string, replicate: string, shard: string, genseed: int64, flags: string, case_select: s (... 59 chars omitted)
                child 0, cell: string
                child 1, replicate: string
                child 2, shard: string
                child 3, genseed: int64
                child 4, flags: string
                child 5, case_select: string
                child 6, elite: int64
                child 7, label_trust: int64
                child 8, trace_exec: int64
              r5er_120b_mc7_r02_u00: struct<cell: string, replicate: string, shard: string, genseed: int64, flags: string, case_select: s (... 59 chars omitted)
                child 0, cell: string
                child 1, replicate: string
                child 2, shard: string
                child 3, genseed: int64
                child 4, flags: string
                child 5, case_select: string
                child 6, elite: int64
                child 7, label_trust: int64
                child 8, trace_exec: int64
              r5er_120b_ht7_r02_u01: struct<cell: string, replicate: string, shard: string, genseed: int64, flags: string, case_select: s (... 59 chars omitted)
                child 0, cell: string
                child 1, replicate: string
                child 2, shard: string
                child 3, genseed: int64
                child 4, flags: string
                child 5, case_select: string
                child 6, elite: int64
                child 7, label_trust: int64
                child 8, trace_exec: int64
              to
              {'r5er_120b_elt7_r00_u00': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('string'), 'genseed': Value('int64'), 'flags': Value('string'), 'case_select': Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}, 'r5er_120b_elt7_r00_u01': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('string'), 'genseed': Value('int64'), 'flags': Value('string'), 'case_select': Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}, 'r5er_120b_elt7_r01_u00': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('string'), 'genseed': Value('int64'), 'flags': Value('string'), 'case_select': Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}, 'r5er_120b_elt7_r01_u01': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('string'), 'genseed': Value('int64'), 'flags': Value('string'), 'case_select': Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}, 'r5er_120b_elt7_r02_u00': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('string'), 'genseed': Value('int64'), 'flags': Value('string'), 'case_select': Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}, 'r5er_120b_elt7_r02_u01': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('s
              ...
              : Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}, 'r5er_120b_mc7_r00_u01': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('string'), 'genseed': Value('int64'), 'flags': Value('string'), 'case_select': Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}, 'r5er_120b_mc7_r01_u00': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('string'), 'genseed': Value('int64'), 'flags': Value('string'), 'case_select': Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}, 'r5er_120b_mc7_r01_u01': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('string'), 'genseed': Value('int64'), 'flags': Value('string'), 'case_select': Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}, 'r5er_120b_mc7_r02_u00': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('string'), 'genseed': Value('int64'), 'flags': Value('string'), 'case_select': Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}, 'r5er_120b_mc7_r02_u01': {'cell': Value('string'), 'replicate': Value('string'), 'shard': Value('string'), 'genseed': Value('int64'), 'flags': Value('string'), 'case_select': Value('string'), 'elite': Value('int64'), 'label_trust': Value('int64'), 'trace_exec': Value('int64')}}
              because column names don't match

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Round-5 ER-cut (2026-08-20): elitism / trust-render / minlen cells

Motivated by the 08-19 synthesis (SELFVERIFY_DESIGN_2026-08-18 §7-§9c): the frontier factorizes into discovery x conversion x RETENTION, and retention is the largest unaddressed leak — union-across-loops reach ≈ 2x the final population in EVERY arm including the oracle control (61 vs 36), because update: replace retains nothing between loops. The RT-cut targets conversion (trace/restart); this cut ships the three cheapest evidence-backed mechanisms that remained:

cell stage mechanism
elt7 retention bank-best elitism: after each loop, selffb/elite_ctl.py scores the new population + the banked incumbent on THAT loop's self-suite (same SPJ harness as the renderer, full-suite execution) and, iff the incumbent strictly beats every child, injects it over the worst slot in the checkpoint. Audited (selffb/elite_audit.jsonl), idempotent under resume, checkpoint rewritten atomically and only on injection. Safe under fitness: diversity + update: replace (the only candidate_groups reader is the never-called logprob scorer; validate_er guards the config).
ht7 label trust label-provenance trust render (FixAudit-style label-as-hint; cc-02618 poison class): phase A --emit-kinds rides per-test provenance (sample/trig/wb/large/gen/probe) inside public_tests; the SPJ harness tags wrong_answer fails with label_kind; the renderer (env LCB_FB_LABEL_TRUST=1) headers each shown Expected output as OFFICIAL sample vs VERIFIER-GENERATED (may be wrong) and replaces the LCB_FB_FULLTESTS CHECK wording — which is FALSE for self arms (§8 defect #1) — with calibrated-trust wording. Only this cell drops FULLTESTS; elt7/mc7 keep it for strict sv7d pairing.
mc7 conversion (representation) minimal-counterexample case-select (PGS-style structural minimality; our killer-test basis: median 26 chars, 97% ≤256B): LCB_FB_CASE_SELECT=minlen — the harness walks the suite shortest-stdin-first, so with the early-stop the ≤3 shown failing cases are exactly the shortest failing inputs. Deterministic, seed-free, zero extra compute.

No baseline units: the concurrent baseline is sv7d r00 (priority run) + r01/r02 (RT-cut) — same 295-problem slice, budgets, pinned loop-0 (all units derive from the same r5sv_120b_sv7_u0x sources; sha-verified in unit.json), same shuffle presentation (mc7 swaps shuffle for minlen — that IS its delta).

18 units = (elt7/ht7/mc7) x (r00/r01/r02: GENSEED 52004/62011/72019) x (u00/u01). Runner: run_shard_r5_er.sh (same UNIT+RUN_DIR contract; it additionally reads ELITE / FB_LABEL_TRUST from unit.env and runs the phase-C elitism hook for elt7). Minipatch = the RT-cut minipatch + ER patches; everything opt-in, bit-identical off (byte-verified vs the RT copies for the harness and renderer with envs unset). elt7 adds roughly one phase-A-sized CPU pass per loop (full-suite scoring of 16+1 candidates).

rt_fix/run_shard_r5_rt.sh: the RT-cut (round5-rt-cells) shipped with its sanity-1 gate still matching r5sv_120b_*, so every r5rt_120b_* unit exits 3 at startup. This is the fixed runner — use it in place of the one inside round5-rt-cells (or sed -i 's/r5sv_120b_\*/r5rt_120b_*/' run_shard_r5_rt.sh).

CPU validation, run all three after cloning (no GPU needed): validate_er.py (27 tests) + validate_rt.py (10) + validate_abcd.py (17) — the latter two prove the ER minipatch regresses nothing RT/ABCD shipped. verify_cut.py checks unit hashes and — new — that every runner's RUN_NAME gate matches its unit prefix (the check that would have caught the RT bug).

Analysis contract: compare cells as 3-seed means, paired per (replicate, problem) against the sv7d replicates; never rank single seeds. Primary metrics: final-16 reach AND union-across-loops reach + retention (union − final) — elt7's whole point is closing that gap, so grade BOTH. Return whole RUN_DIRs incl. *.summary.jsonl, fb_audit.jsonl, selffb/ (now may carry elite_bank.json + elite_audit.jsonl), metrics_loops.json.

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