sneak/pixa

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The fetcher accepts image/svg+xml and internal/magic detects SVG. orig
of an SVG at the orig size is the SVG unchanged, cached as a variant; at
another size it is ErrSVGNotOriginalSize (400). Any other format renders
it with libvips' thumbnail at the least size covering the output, at
most 8192 on a side, so it stays sharp. An SVG's own size is not
limited; one with a side over 8192 times the other is ErrSVGTooThin
(415). The cache reads up to 1024 first bytes to find a file's format.
Tests that pinned the SVG refusal now expect SVG to be read. Render time
and memory are unbounded: P1 in TODO.md until the owner decides on
#68.

Model: opus-5-5

2026-11-11 13:21:12 +00:00

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Workflow

branch per issue from next
do the work in Next Step
delete Next Step from TODO.md
TODO.md merges with git's union merge (.gitattributes), which never reports a conflict: read the merged entries after every merge or rebase
move the top item of Future Steps into Next Step
commit (TODO.md changes in the same commit as the work)
open a PR based on next
an independent reviewer who did not write the change gates it
the manager squash-merges the PR into next once review passes
next stays green and mergeable to main at any time; only the owner merges next into main, via the single milestone PR
push

Status

pre-1.0. The 1.0.0 milestone is in progress.

Next Step

P1: security: bound the time and memory of rendering an SVG source. Both grow with what the SVG draws, such as filter effects. govips cannot stop or limit a render. The bound is the owner's decision on #68.

Future Steps

P2: security
- per-origin rate limiting
P2: HTTP response handling
- Last-Modified headers
P2: operational
- Prometheus metrics still missing:
  - cache hits and misses, split into source images and variants
  - cache size on disk and its limit
  - evictions and the bytes they free
  - upstream fetch duration and errors
  - transcode duration
  - images in processing
- measure the 1k to 5k req/s target with script/loadtest on a machine not shared with other work

1.5 KiB Raw Blame History

Workflow

Status

Next Step

Future Steps

1.5 KiB

Raw Blame History