feat/shaper helper dedup

[thejustinwalsh]

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[github-actions]

Docs report 📚

Advisory only — this never blocks merging. Anything left open is tracked in the Sync agent docs issue and verified after merge.

Package	Concept	Attestation	Status
@pmndrs/glyph-benchmarks	packages/benchmarks.md · edited	Promoted the existing offline packed-core-consumer peer isolation to the lowest held layer; package concept remains acc…	✅
@pmndrs/glyph	packages/glyph.md · edited	Preserved prepared anchor measurements and explicit renderer invalidation in the lowest held layer; corrected existing … (made at ebeb2657, source now db2f5e5b)	⚠️

✅ attested · ⚠️ stale · ❌ missing

After your last source change, update each concept if it is now wrong, then record what you changed and checked:

• packages/glyph.md: mise exec -- pnpm scripts run docs:attest -- @pmndrs/glyph "<what you changed and checked>"

[github-actions]

size-limit report 📦

Surface	gzip	Surface	gzip
Core JS	91.9 kB (0%)	Inter font · Bitmap	558.2 kB (0%)
Shaper Wasm	591.7 kB (<0.01% )	Inter font · MTSDF	8.17 MB (0%)
Three.js adapter JS	143.4 kB (0%)	Inter font · Slug	618.3 kB (0%)
React adapter JS	143.1 kB (0%)	Font Awesome icons · Bitmap	449.9 kB (0%)
Vue adapter JS	142.9 kB (0%)	Font Awesome icons · MTSDF	8.76 MB (0%)
R3F hello-world app JS	747.9 kB (<0.01% )	Font Awesome icons · Slug	657.9 kB (0%)
Tres playground app JS	572.2 kB (<0.01% )	Bitmap baker JS	4.9 kB (0%)
Font validator JS	144.8 kB (0%)	Bitmap baker Wasm	231.1 kB (<0.01% )
Runtime bake host JS	6.1 kB (0%)	MTSDF baker JS	5.6 kB (0%)
Runtime bake Worker JS	13.5 kB (0%)	MTSDF baker Wasm	215.5 kB (<0.01% )
Font baker JS	2.6 kB (0%)	Slug baker JS	4.5 kB (0%)
Font baker Wasm	389.0 kB (+0.02% )	Slug baker Wasm	183.7 kB (<0.01% )

[github-actions]

Package performance: smoke suite

0 faster · 3 slower · 1 neutral · 2 skipped

Baseline 0.1.0-canary-4e25a96a-20261015 → candidate 0.1.0 (b4b8c590)

Latency distribution across 4 comparable workload p50s. Each workload counts once; these are not frame times.

statistic	baseline	candidate
Median workload p50	2.750ms	3.420ms
Workloads ≤1 ms	1	1
Workloads ≤2 ms	1	1
Workloads ≤3 ms	3	1
Workloads >3 ms	1	3

Largest candidate workloads (including neutral results):

workload	baseline	candidate	Δ time
relayout after font-size change	3.64ms	4.27ms	+0.630ms
publish after color change	2.83ms	3.51ms	+0.680ms
measure after text change	2.67ms	3.33ms	+0.660ms
measure 100 unchanged labels	62.87µs	66.59µs	+0.004ms

                                   faster ◀       ┊       ▶ slower    Δ p50      p  baseline   candidate
- measure after text change                       ┊        ├─●──┤    +24.9%   .029  ▃▆█▃▁▁▁▁▁▁ ▁▁▁▁█▆█▂▃▁
- publish after color change                      ┊     ├───●───┤    +24.2%   .029  ▆▇█▄▃▁▁▁▁▁ ▁▁▁█▆▇▄▁▁▂
- relayout after font-size change                 ┊   ├───●┤         +17.5%   .029  ▄█▃▄▃▁▂▂▁▁ ▁▁▁█▄▂▄▂▃▁
  measure 100 unchanged labels                   ├┼──●──┤             +5.9%   .114  ▃████▄▃▂▂▃ ▁▃▆▇█▄▃▃▁▂
                                   └──────────────┴──────────────┘
                                   -35%           0           +35%

status	bench	baseline	candidate	Δ time	Δ p50	p	95% CI
🔴 slower	measure after text change	2.67ms	3.33ms	+0.660ms	+24.9%	.029	+20.2..+33.4%
🔴 slower	publish after color change	2.83ms	3.51ms	+0.680ms	+24.2%	.029	+13.2..+31.8%
🔴 slower	relayout after font-size change	3.64ms	4.27ms	+0.630ms	+17.5%	.029	+8.6..+20.8%

1 neutral, 2 skipped

status	bench	baseline	candidate	Δ time	Δ p50	p	95% CI
neutral	measure 100 unchanged labels	62.87µs	66.59µs	+0.004ms	+5.9%	.114	-3.3..+14.7%
skipped: clock-confounded: slower→neutral · 2.99→3.13	publish after text change
skipped: clock-confounded: slower→neutral · 3.08→2.95	reflow after width change