Context (round 4, snapshot10e): 8/8 pass.
c3: 'context window is 96% full' figure correct (floor((49051+9000)*100/60000)); /compact 49,127 -> 18,726; continuation resumed at line 516 and wrote ARCHITECTURE.md. Labels keep '.../project/engine/<file>' -> round-3 c3 issue fixed.
New clip marker read correctly by every writer/summariser (c1, c4: 'trimmed in this copy only'; c2 /compact transcript has no limit, no markers).
c1/c4 unfinished by the model: Haiku re-read files the handoff said were done (c1) or re-read 1-480 in two parallel chunks overflowing the 40K budget twice (c4). G-Code handoffs correct (original request quoted, right previous session/path, interrupted markers, pairs). All costs match exactly.
Observations / ideas (not defects): no stall guard across a chain of handoffs with no progress; split compaction transcript parts lack a 'continues in the next part' note (part-2 summariser thought queryEngine.ts ended mid-statement; no loss); c1 handoff writer labelled an unseen batch as seen. Harness: driver counts context-full answers, not compactions (c2 1 vs 2 frames, c3 0 vs 1).
