multishell.test (10 tests, ~105s solo child - the -jobs floor) split five
ways along shared-fixture boundaries, every test moved verbatim with its
provenance lines: multishell.test keeps wrap + structure/LF-only + exec
smoke (incl WSL); multishell_wrapverify.test (fresh-wrap checkfile) and
multishell_wrapdeterminism.test (byte-identical re-wrap) each re-pay the
wrap fixture; runtimecmd_checkfile.test and runtimecmd_roundtrip.test
guard the committed bin/runtime.cmd and its source round-trip with no
wrap fixture at all. argparsingtest.test (17 tests, ~32s) split into
timeit/discover/contract/first_call (11) + argparsingtest_compare.test
(compare_*, 6). Assessed and left unsplit: dtplite.test (24.6s solo),
scriptexec.test (12s); exec.test excluded as imported core material.
File headers point at the src/tests/modules/AGENTS.md punk/mix bullet
for the sibling map; the runtests longest-first weight table carries
measured post-split weights.
runtests_parity.tcl gains a -names mode: multiset comparison of
'- testname:' lines from '-report markdown -show-passes 1' captures,
file attribution ignored - verbatim moves compare identical, lost/
duplicated/renamed tests are reported.
Verified (native tclsh 9.0.3): repeated -jobs 8 full-suite runs 1m26.3s
/ 1m26.8s (was 2m16s at G-091, ~5m40s sequential - 4.07x vs the
pre-parallel baseline, 36.6% vs the G-091 reference); slowest child
30.7s / 31.3s (bound 45s); NAMES identical (989 occurrences) vs the
pre-split sequential capture; tallies identical in every run (989/973/
15/1, exec-14.3 sole failure, files 87 -> 92); PARITY ok -jobs 8 vs
-jobs 1 and between repeats; repo clean after runs. Notable finding
recorded in the goal file: child-wall contention inflation (~45% with
50s+ dominant children present) collapsed to ~15% once the work
distribution was flattened - splitting reduced both the critical path
and the contention itself.
G-092 flipped to achieved 2026-07-19 and archived (GOALS-archive.md
record, detail file with full verification evidence to goals/archive/).
goals_lint clean. Also noted in the goal file, out of scope: runtests
-include-paths multi-pattern/repeated-flag matching misbehaved during
measurement (single value with four deep patterns matched one; repeated
flags matched zero) - contradicts documented semantics, needs its own
investigation.
Assisted-by: harness=claude; primary-model=claude-fable-5; api-location=anthropic.com
User-approved draft from the G-091 verification data: multishell.test's
~2m child wall is the -jobs floor (full-suite -jobs 8 = 2m16s); splitting
the long suites (multishell, dtplite, argparsingtest, scriptexec if
worthwhile; exec.test excluded as imported core material) along
shared-fixture boundaries targets no child wall above 45s and at least a
25% full-suite improvement, with name-level test conservation, provenance
lines travelling with moved tests, weight-table updates, and parity
gating. Context records the fixture-duplication tradeoff (total CPU up,
wall down) and the complementary lean-children candidate.
Assisted-by: harness=claude; primary-model=claude-fable-5; api-location=anthropic.com
Julian Noble