The invariant this closes: every admitted file receives at least its
reservation before any file draws on carry-forward slack. CG-30 bounded an
oversize cluster member and CG-31 gave the cluster path a displacement guard;
three holes were left, and each one starved a file that had been admitted,
reserved and — in the worst case — rendered.
1. The whole-file arms had no displacement guard. BUY's fit test read
`renderCeiling - totalChars` (everyone's room) while its source-space
sibling refused the same trade, and GRACE was not fit-tested at all.
okhttp's CallServerInterceptor.kt shipped 8,499 chars on a 5,964 funded
ceiling and the rank-6 file below it delivered nothing. Both arms now test
the render they actually produce against `fundedHeadroom`, and a whole
render that does not fit falls through to clustering instead of skipping
the file.
2. Every section was charged a flat 200 chars while a real header runs
300-500. The loop believed it had room it did not have — okhttp allocated
26,601 against a 24,400 ceiling — so the final truncation threw a
fully-rendered section away. Sections are charged their real cost now, the
owed-below arithmetic uses a per-file overhead estimated from the file's own
symbols, and a marginal overrun trims the weakest cluster (or windows the
last one into the room that is left) rather than skipping the file over a
rounding difference.
3. `owedPayableBelow` held all-or-nothing. When the last admitted file's FULL
reservation no longer fit, nothing was held for it: on the precise-query
fixture the rank-5 file took 4,134 chars against a 2,948 reservation while
rank 6 — admitted, reserved 2,539 — was left 4 chars and skipped. It now
holds the remainder while that remainder is still worth a section
(MIN_CHARS).
And the epilogue is budgeted instead of discarded. The flat 600-char margin was
neither the epilogue's size (1,064 gin, 1,788 django, 2,231 excalidraw) nor a
bound on it, so four of six suite repos shipped with no pointer list and no
reminders at all. The loop now reserves the epilogue's FLOOR — the one line
that says an uncovered area exists, plus a pointer for every file whose bytes
were deliberately withheld (CG-12) — and the rest is fitted to the room that
actually remains, in priority order, entry by entry. Sized from the real
strings; no constant was swept against the suite.
Deterministic, same clean-rebuilt indexes, baseline = CG-31 tip:
repo base source new source files ceiling
django 20,791 20,878 6 -> 6 was discarding its epilogue
tokio 21,521 21,607 5 -> 5 was discarding its epilogue
okhttp 19,034 18,870 5 -> 6 +1 file delivered
excalidraw 20,204 19,652 8 -> 8 keeps its pointer list
gin 10,776 10,776 4 -> 4 byte-identical
alamofire 11,662 11,662 2 -> 2 byte-identical
No repo truncates any more and none loses a file. okhttp and excalidraw trade
164 and 552 source chars on their LAST-ranked file for the pointer list naming
what the response could not cover — bytes the CG-31 tip only had because it
over-filled a ceiling it mis-measured and then discarded the epilogue whole.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Colby McHenryandClaude Opus 5
7cbde95ce2