`codegraph_explore` never returned `queueMessage` (L1087) or
`flushQueuedMessages` (L1102) from a 1,414-line file, on a symbol bag or a
prose question, even with that file at rank #1 holding 67% of the envelope —
the agent got a same-stem `QueuedMessage` interface at L70 and had to Read the
file for the functions it had named. Pre-existing at every build including
pre-epic (controlled bisect, index held fixed).
Two independent causes:
1. `buildFlowFromNamedSymbols` returns the Flow prose AND the set of node ids
the agent named — and the latter is the whole guarantee, since it injects a
named def into its file's cluster ranges at importance 9. Its bail-outs
returned EMPTY, zeroing the identity whenever there was nothing to PRINT.
Two sibling closures that never call each other produce no chain, no synth
hop and no boundary, so both defs lost importance 9 and the file rendered
from its head. `identityOnly()` now separates the two, gated on
shape-precise tokens so a prose word that exact-matches a callable cannot
promote itself.
2. The ceiling trim filled in SOURCE order, so an over-ceiling render always
dropped the END of a large file first. The shrink HAD kept both symbols
(1022-1121); the trim cut back to 839. `windowToCeiling` now takes the
spine call site plus every importance>=9 member as focus lines, tries the
full ceiling first, and splits the held-back reserve evenly with
carry-forward — greedy-in-source-order reproduced the bug one level down.
The shrink's loose size estimate is left alone deliberately, and the comment
now says why: making it exact was built and measured WORSE (it stops at the
last member that fits whole and the released bytes carry forward to
lower-ranked files, costing payroll-go's `s.store.Upsert`). `bound()` clamps to
the ceiling anyway, so the slack costs no bytes; it just must not pick the
survivors, which is what the trim now handles.
The measurement gap this closes: every existing probe is aggregate — envelope
share, per-file spend, source totals, file counts — and all are green on a
response that returns 25K from the right file and omits the named function.
`probe-named-symbol.mjs` checks the definition LINE against the response's
rendered lines, per symbol.
Suite envelope byte-identical to main on all six repos; probe-allocation 4/4,
no starvation flags; 180 files / 2,997 tests green. Fixture: 7/7 fail on main,
7/7 pass here, deterministic over 4 runs per arm.
Colby McHenry
89c53ddf24