Files
BFM-decomp/docs/burndown.jsonl
T
Drew T c6515a6cdc fix(phase-29): the FLOOR VERDICT was an artifact of snapshot frequency, not yield decay
burndown.py averaged the last 3 INTER-COMMIT deltas. The phase's ROI criterion is
"per-SESSION yield floors out", and historically one snapshot was taken per session
— but I seeded THREE inside this session (9, 9b, 9c). Averaging them drove the mean
to +0.23 and printed "AT THE FLOOR — consider closing P29" for a session that
actually yielded +0.7pp instr (78.0 -> 78.7), comparable to recent sessions.

I nearly closed the phase on it. Same error class as everything else this session:
an instrument answering a DIFFERENT QUESTION than the one asked, where the wrong
answer is indistinguishable from the right one.

- --session-close marks a snapshot as a session boundary; the floor verdict is now
  computed ONLY from those (older records predate the flag, so a label containing
  "close" counts too). Mid-session snapshots still record for tracking.
- honest output now: "0 SESSION-to-SESSION delta(s) logged — need >=3 for a floor
  verdict (1 session-close snapshot on record)".

=> P29 must NOT close on ROI grounds yet: the floor is UNDETERMINED and needs 3
session closes to become computable. The eyeballed "+2.5 -> +1.1 -> +0.6 -> +0.2"
trend is not the instrument's verdict either.
2026-07-22 15:24:59 -06:00

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{"head": "commit:0763", "label": "session-4 close (post func_8017AE2C \u00d7137)", "instr_pct": 78.0, "distinct_pct": 66.5, "fn_pct": 87.9, "substantial_families": 572, "templatable_ins": 1578048, "matched_sib": 67}
{"head": "commit:0826", "label": "session-9 (gate_stage SHA fix + t5wave re-run + family sweeps)", "instr_pct": 78.5, "distinct_pct": 67.5, "fn_pct": 88.06, "substantial_families": 569, "templatable_ins": 1521954, "matched_sib": 71}
{"head": "commit:0831", "label": "session-9b (func_801299C8 x137; 0x8013C414 -O0-walled)", "instr_pct": 78.6, "distinct_pct": 67.9, "fn_pct": 88.1, "substantial_families": 568, "templatable_ins": 1500308, "matched_sib": 70}
{"head": "commit:0834", "label": "session-9 CLOSE (gate_stage SHA fix; 5 families swept; 7/12 t5wave cracks banked)", "session_close": true, "instr_pct": 78.7, "distinct_pct": 67.9, "fn_pct": 88.14, "substantial_families": 568, "templatable_ins": 1486476, "matched_sib": 70}