fix: draft

[xangcastle]

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Changes are visible to end-users: no

Test plan

• Covered by existing test cases

[aspect-workflows]

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📅 Fri Jul 10 19:03:39 UTC 2026

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[github-actions]

py_binary startup benchmark

Version	Mean (ms)	Median (ms)	± stddev	vs BCR	vs main	Build (s)
BCR 1.11.7 (baseline)	142.253	134.399	±31.584	—	—	27.50
HEAD main	46.253	46.186	±0.552	-67.5%	—	9.25
This PR	46.864	46.247	±2.676	-67.1%	+1.3%	5.93

Measured with hyperfine --warmup 5 --runs 50 on Linux
Gate: PR vs HEAD main (threshold: 10%). BCR is shown only as a historical baseline.
Build time: cold bazel build //:bench with isolated output base, no disk cache.

sys.path quality

Version	sys.path entries	distinct site-packages roots	duplicate realpaths
BCR 1.11.7 (baseline)	6	1	0
HEAD main	7	2	0
This PR	7	2	0

sys.path quality measured by bench_syspath inside the assembled venv. Duplicate realpaths indicate symlink redundancy; many distinct site-packages roots suggest an inefficient venv layout.

Bazel analysis benchmark

Version	Mean (ms)	Median (ms)	± stddev	vs BCR	vs main	Packages	Targets
BCR 2.0.0-alpha.4 (baseline)	10891.064	10922.737	±121.431	—	—	101	301
HEAD main	10083.246	10075.099	±210.972	-7.4%	—	101	301
This PR	10122.818	10128.033	±109.625	-7.1%	+0.4%	101	301

Measured with hyperfine --warmup 1 --runs 10 on Linux
Gate: PR vs HEAD main (threshold: 10%). BCR is shown only as a historical baseline.
Command: cold bazel build --nobuild //workspace/... with isolated output base, no disk cache.

Auxiliary metrics

Version	Loaded packages	Configured targets
BCR 2.0.0-alpha.4 (baseline)	101	301
HEAD main	101	301
This PR	101	301