workflow-fix: stream-reduce activation spans, never materialize all N
kind: infra#wf-fix#wf-fix-fp:997f657054ce
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Overview / Motivation
Auto-filed from the predictor-line (#742/#761/#763) infra-friction retrospective (subagent, 2026-06-30). Related in-flight: #770 (RunPod no-port wedge billing), #681 (data-disk bind cutover), #667 (GCP frozen-phase), #769 (CUDA-frag OOM).
Goal
Add a stream-reduce rule: an analysis reading N multi-GB per-context .pt blobs from HF MUST use the canonical _HfStreamSpanSource (download->process->delete, peak one ctx) with the _assert_attn_stream_equivalence gate, never download all N locally; cite #761's 220 GB refill.
Workflow gap
- Bug observed: #761 re-downloaded the full 220 GB UltraChat answer_spans (4.4GB x 50) into a local cache and refilled /, despite the canonical streaming helper _HfStreamSpanSource already existing in scripts/issue658_fit_predictors.py (download->process->delete, peak ~1 ctx) — a built-but-stranded helper not reused by the sibling bootstrap.
Scope / surfaces
- Target: .claude/rules/code-style.md
Constraints / invariants
- Workflow-surface only; ruff + workflow_lint pass; add a test where practical.
Provenance
- workflow_fix_target: .claude/rules/code-style.md
- fingerprint: 997f657054ce
Raised by the predictor-line infra retrospective (2026-06-30).
Activity