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Support SVG sources (closes #68)
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 15:43:16 +00:00

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Markdown

# 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
https://git.eeqj.de/sneak/pixa/issues/68.
# Future Steps
- P2: security
- per-origin rate limiting
- P2: HTTP response handling
- Last-Modified headers
- P2: operational
- measure the 1k to 5k req/s target with `script/loadtest` on a machine not
shared with other work