docs: mark fi==9 decoder skip as fixed in CLAUDE.md

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -175,12 +175,13 @@ in the chunk loop passes `timeout=10.0` explicitly.
 end-of-stream. Chunks with uniform 1,036-byte data are all-zero ADC samples (post-event
 silence). Only the initial variable-size chunks contain actual signal.
 
-### SUB 5A — known decoder issue: fi==9 hardcoded skip (not yet fixed)
+### SUB 5A — fi==9 hardcoded skip (FIXED 2026-04-06)
 
-`_decode_a5_waveform()` in `client.py` has `elif fi == 9: continue` — a leftover from the
+`_decode_a5_waveform()` previously had `elif fi == 9: continue` — a leftover from the
 9-frame original blast capture where frame 9 was assumed to be a terminator. For current
-35-frame streams, fi==9 is live waveform data (~133 sample-sets dropped). Terminator
-detection is via `page_key == 0x0000`, not frame index. This skip should be removed.
+35-frame streams, fi==9 is live waveform data (~133 sample-sets were being dropped).
+Removed. Terminator detection is via `page_key == 0x0000` in `read_bulk_waveform_stream`,
+not frame index.
 
 ### SUB 1E / 1F — event iteration null sentinel and token position (FIXED, do not re-introduce)
 

minimateplus/client.py

@@ -930,10 +930,9 @@ def _decode_a5_waveform(
         elif fi == 7:
             continue
 
-        # A5[9] is the device terminator frame (page_key=0x0000), also no data.
-        elif fi == 9:
-            continue
-
+        # Terminator frames have page_key=0x0000 and are excluded upstream
+        # (read_bulk_waveform_stream returns early on page_key==0).
+        # No hardcoded frame-index skip here — all non-metadata frames are data.
         else:
             # Strip the 8-byte per-frame header (ctr + 6 zero bytes)
             if len(w) < 8: