Bring SkillOpt's epoch-wise slow/meta update (paper §3.6) into the sleep engine
as skillopt/sleep/slow_update.py — import-light, driven through the Backend
abstraction (mock/claude/codex):
- Reuses the main repo's protected-field markers
<!-- SLOW_UPDATE_START --> ... <!-- SLOW_UPDATE_END --> so the artifact is
compatible; step-level edits never touch this field.
- run_slow_update compares behavior under the first-night vs final skill across
the val tasks, groups into improved/regressed/persistent/stable, and asks the
optimizer to distill durable longitudinal guidance (refining prior text).
- Wired into run_gbrain.run_seed AFTER the nights loop, gated by slow_update=True
and run REGARDLESS of gate_mode — this is what preserves long-term memory even
when the user turns the hard gate OFF (the user's slot_date=slow-update intent).
2 new tests (protected-field round-trip, stub-backend synthesis). 23 tests pass.
Co-Authored-By: Claude Opus 4 <noreply@anthropic.com>
Data-split refactor (the anti-overfitting foundation the user asked for):
- TaskRecord gains split∈{train,val,test} and origin∈{real,dream}.
- assign_splits: real tasks deterministically split into val/test (disjoint);
DREAM-augmented tasks (origin='dream') NEVER enter val/test — they only go to
train. val gates updates; test is the final held-out measure.
- gbrain loader maps its held-out.jsonl -> test, benchmark.jsonl -> train/val,
so the gbrain held-out stays the true final score.
- consolidate(): train drives reflect, val gates; adds gate_mode='off' (greedy,
no hard filter) reporting val movement (greedy_improved/regressed/flat).
- run_gbrain/transfer/experiment score on test (val fallback); run_gbrain gains
--gate on|off. Legacy replay/holdout names normalized.
New test proves dream tasks never land in val/test. 21 tests pass; mock
experiment + gate=off both green.
Co-Authored-By: Claude Opus 4 <noreply@anthropic.com>
Three additions driven by the goal of price-aware, model-flexible sleep:
1. DualBackend + build_backend(): route attempt->TARGET model and
reflect/judge->OPTIMIZER model (SkillOpt's target-vs-optimizer split).
gbrain runner gains --optimizer-backend/-model + --target-backend/-model.
2. run_transfer.py: sleep-scenario cross-model transfer. Optimize a skill on a
SOURCE model (e.g. cheap haiku), freeze it, evaluate held-out on a TARGET
model (e.g. expensive sonnet) with no further optimization — plus a direct
reference. Mirrors the SkillOpt paper's transfer table; quantifies the
"optimize cheap overnight, deploy anywhere" value prop.
3. llm_miner.py: turn real harvested transcripts into TaskRecords WITH checkable
rule/rubric judges, wired into the cycle for non-mock backends, so real-data
lift becomes measurable (heuristic miner remains the no-API fallback).
Fixed a str.format brace bug the new unit test caught.
19 tests pass.
Co-Authored-By: Claude Opus 4 <noreply@anthropic.com>
Upgrade from mock-only to REAL multi-backend validation:
Backends (skillopt/sleep/backend.py):
- CliBackend base: shared attempt/judge/reflect prompts, response cache,
token accounting. Subclasses implement only _call().
- ClaudeCliBackend: drives `claude -p --output-format text`.
- CodexCliBackend: drives the REAL @openai/codex `exec -o <file>` for clean
output; resolve_codex_path() skips the hermes wrapper at ~/.local/bin/codex.
- reflect() now aggregates the exact failing judge criteria into the prompt
(gbrain's lesson: tell the optimizer what the scorer rewards).
Rule judges (skillopt/sleep/judges.py): gbrain-compatible local scorers
(section_present / regex / max_chars / contains / tool_called) — held-out
scoring with no judge-API spend. TaskRecord gains a `judge` field +
reference_kind="rule".
gbrain-evals adapter (experiments/gbrain_bench.py, run_gbrain.py): load
garrytan/gbrain-evals skillopt-v1 deficient skills + train/held-out task
sets and run our consolidate() loop against the SAME suite gbrain scores.
REAL results (docs/sleep/real_api_results.md), brief-writer seed, 1 night:
- Claude (Haiku): held-out 0.00 -> 1.00
- Codex: held-out 0.00 -> 0.67
Both proposed a correct, general format rule into the protected LEARNED block.
CLI: --backend {mock,claude,codex}, --codex-path, --model; experiment +
gbrain runners gain --limit-* cost controls. 17 tests pass.
Co-Authored-By: Claude Opus 4 <noreply@anthropic.com>
Yifan Yang