A pending-then-frozen registration left two rows and rows[0] could be the stale
pending one, so fill and run refused a properly frozen experiment. Implemented
with Codex.
Co-Authored-By: Claude Opus 5.5 <[email protected]>
An experiment's register, run, result and arm_outcome rows share one object,
and RustFS's S3 Select infers one schema per object: exp-002's result row
carried `units` as an object beside the run row's integer (and `looks` as
objects beside the register row's fractions), and after `analyse --record` no
row of the experiment could be read (JSONParsingError). The result row now
writes `unit_counts` and `looks_taken`; a test asserts one JSON shape per
column across the four row kinds. The live object was repaired by dropping
the one row (drop_rows) and recording the analysis again.
Co-Authored-By: Claude Fable 5.1 <[email protected]>
Claude-Session: https://claude.ai/code/session_01EmM1j46qgKMh3zqD1QMwEo
learn/experiments.py: YAML manifests under plane/experiments/<id>.yaml,
digest-checked at register, run and analyse time; `experiment`,
`arm_outcome` and `experiment_result` rows; paired arms in a seeded
repository order with a per-unit coin; arm A replay-only at $0; canary
replicates under a fresh cache salt; repository-cluster paired bootstrap,
exact McNemar, two O'Brien-Fleming looks, adopt/reject/equivalent/
inconclusive. `ousast learn experiment register|units|run|analyse`.
Program: `ProgramSpec.sampling = retrieval_ensemble` (k samples at
temperature 0 over k disjoint retrieved example sets; default unchanged);
`Caller.salt`; `retrieve(exclude=)`. verify: OUSAST_VERIFY_CALLERS=off.
Manifests exp-001-known-callers (plane arms, units pending) and
exp-002-retrieval-ensemble (slice-2 incumbents, ceiling $4) -- not run.
18 scripted tests; module audit regenerated (151 modules).
Co-Authored-By: Claude Fable 5.1 <[email protected]>
Claude-Session: https://claude.ai/code/session_01EmM1j46qgKMh3zqD1QMwEo
