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Garry Tan
dd84bdb7d9
Full-page screenshots of tall pages routinely exceeded 2000px on the longest dimension, silently bricking the agent's session: the resulting base64 reached the Anthropic vision API which rejected the oversized image, leaving the agent burning turns on a useless blob with no stderr trace from the browse side. Adds browse/src/screenshot-size-guard.ts as a shared helper: - guardScreenshotBuffer(buf) → downscales in-memory if max(w,h) > 2000 - guardScreenshotPath(path) → file-mode variant that rewrites in place - Aspect ratio preserved via sharp's resize fit:inside - Stderr diagnostic on any downscale so callers can see when it fired - Lazy sharp import so non-screenshot paths pay no startup cost Wires the guard into all three full-page callsites codex review flagged: - browse/src/snapshot.ts: annotated + heatmap fullPage captures - browse/src/meta-commands.ts: screenshot command (path + base64 fullPage modes) plus the responsive 3-viewport sweep - browse/src/write-commands.ts: prettyscreenshot fullPage path Covers seven unit cases (pass-through, downscale, aspect ratio, exactly-2000px edge, file-mode rewrite) plus a static invariant test that fails the build if any of the three callsites stops importing the guard. Closes #1214. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>