auto-data-snapshot: 2026-09-09T13:56:45 (1 data files) — verification/signature-viewer-decision.md

6140aaa7e8b7c2a7340ecfd48f500a27c747436c · 2026-09-09 13:59:26 -0700 · auto-commit-fleet
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A verification/signature-viewer-decision.md
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commit 6140aaa7e8b7c2a7340ecfd48f500a27c747436c
Author: auto-commit-fleet <steve@designerwallcoverings.com>
Date:   Wed Sep 9 13:59:26 2026 -0700

    auto-data-snapshot: 2026-09-09T13:56:45 (1 data files) — verification/signature-viewer-decision.md
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+# Signature viewer decision
+
+Decision A: client Canvas cleanup and accessible selector. Confidence medium;2/2 valid voters,2/6 available.
+
+## claude
+
+[claude disabled: DTD_ZERO_COST=1]
+
+
+## codex
+
+VERDICT: A
+
+A is the smallest reliable scope: it preserves the zero-dependency architecture while adding adaptive normalization, lazy rendering, and an accessible, race-safe selector that replaces the large modal image with any chosen alternative. Keep normalization display-only and conservative to preserve handwriting, retain original links and attribution, and preserve selections through failures. When CORS, unsupported formats, or document scans prevent useful normalization, show the original where possible or an explicit error with retry and source access; never imply successful extraction. B adds unnecessary server infrastructure, while C cannot reliably produce dark signatures on pure white across these varied sources.
+
+## qwen
+
+VERDICT: A  
+Option A meets the requirement for a zero-dependency, read-only display by leveraging client-side Canvas for adaptive normalization, ensuring dark signatures on white backgrounds without altering original documents. It addresses per-person alternate thumbnails through lazy gallery rendering and source-safe URLs, preserving exact source attribution and enabling explicit retry for error recovery. Bounded concurrency/cache and CORS-safe fallbacks ensure reliability, while accessible buttons and race-safe selection uphold usability without introducing server dependencies or image processing that could distort original content. This scope is minimal yet comprehensive for the specified needs.
+
+
+## grok
+
+[grok unavailable]
+
+
+## kimi
+
+[kimi unavailable]
+
+
+## muse
+
+[muse unavailable]
+
+
+## Post-decision review
+
+**PROSECUTOR:** A promises an outcome its architecture cannot reliably deliver. Canvas cannot read pixels from cross-origin images without suitable CORS permissions, and normalization cannot reliably distinguish faint handwriting from paper texture or stamps. A document scan may require extraction, not contrast adjustment. Showing the original or an error preserves access but does not produce a dark signature on white. The panel offers no representative-source testing establishing feasibility. If uniform output is mandatory, rejecting server processing as “unnecessary” is premature.
+
+**DEFENDER:** That objection defeats a universal guarantee, but A expressly allows original-image fallbacks and explicit failures. Its constraints prioritize zero dependencies, read-only presentation, preservation of handwriting, and source attribution. Server infrastructure would expand scope without itself solving ambiguous extraction or guaranteeing faithful results. A handles uncertainty visibly while delivering alternate-image selection independently of normalization. The missing tests limit confidence in coverage; they do not establish that another option better satisfies the stated constraints.
+
+**JUDGE:** The prosecutor exposes a real overstatement: A cannot guarantee normalized output across every source. Nevertheless, the supplied decision explicitly accepts conservative processing and transparent fallbacks. Under those constraints, unreliable inputs justify bounded behavior, not an architectural expansion whose necessity remains unproven.
+
+FINAL: KEEP
+
+The controlling argument is that successful normalization is conditional under the supplied constraints, while faithful display, source access, and explicit failure remain mandatory. A respects that boundary with the smallest proposed scope; overturning it would require evidence that universal normalization is an overriding requirement or that its fallback behavior is unacceptable.
+
+## Implementation evidence
+
+Wikimedia Special:FilePath redirects block Canvas CORS. Resolve source images through the public imageinfo API (origin=*), accepting only upload.wikimedia.org and thumb.wikimedia.org results. SVG/TIFF rendered thumbnails load with CORS, demonstrated by tmp/probe.cjs. Source pages and strokes are not extracted or redrawn.
+
+Documentation: https://www.mediawiki.org/wiki/API:Imageinfo ; https://www.mediawiki.org/wiki/API:Cross-site_requests
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