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docs: dense storage fixes and the real limits of big groups

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The changelog, known issues and README said a group holds up to 65 535
links while a group of about 17 000 was already unreadable. Record the
fixes (child indirect blocks, the next-block offset, the index leaf cap,
refusing oversized dense messages, hard-link memoisation, dataset
attribute overwrite) and the limits that remain true: 65 535 links or
dense attributes per object, and 65 515 bytes per dense message.

Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
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osobh
2026-09-26 09:02:47 -05:00
co-authored by Claude Opus 5.5
parent 8bcae3c78e
commit 546fdb84fa
3 changed files with 54 additions and 8 deletions
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README.md
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@@ -429,7 +429,8 @@ b.add_external_link("raw", "raw.h5", "/data");
b.write("groups.h5")?;
```
A group holds at most 65 535 links; more is an error.
A group holds at most 65 535 links; more is an error, as is a link over
65 515 bytes (a very long soft-link target) in a group of more than 8 links.
### Agent Memory