[codex] Add namespace compression drafts

[kixelated]

Summary

• Make moq-lite ANNOUNCE_BROADCAST payloads mandatory DEFLATE-compressed bytes, leaving only Message Length uncompressed for framing.
• Add a new MoQ Transport Namespace Compression extension draft for compressing Track Namespace Suffix fields in NAMESPACE and NAMESPACE_DONE responses.
• Define NAMESPACE_COMPRESSION setup negotiation with 0 = deflate; when both peers negotiate the same algorithm, compression is mandatory for namespace responses on the session.
• Define retained per-stream DEFLATE contexts with Z_SYNC_FLUSH per message, stripping and restoring the fixed 00 00 ff ff sync-flush marker to match moq-flate/RFC 7692 style framing.

Impact

This reduces repeated namespace/path overhead for large announcement streams while keeping each namespace change as its own protocol message. The MoQ Transport extension is field-level, so future NAMESPACE/NAMESPACE_DONE fields keep their normal encoding.

Validation

• make draft-lcurley-moq-namespace-compression.txt
• make draft-lcurley-moq-lite.txt
• git diff --check HEAD~1..HEAD

[coderabbitai]

Walkthrough

One draft adds Announce Deflate negotiation and Announce Encoding handling for ANNOUNCE_BROADCAST path suffixes, including compressed suffix encoding rules. A second draft defines MoQ Namespace Deflate Extension, covering SETUP negotiation, SUBSCRIBE_NAMESPACE parameters, compressed Track Namespace Suffix handling for NAMESPACE and NAMESPACE_DONE, security considerations, and IANA registrations.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Title check	✅ Passed	The title is concise and clearly refers to the added namespace compression drafts.
Description check	✅ Passed	The description matches the PR’s focus on MoQ DEFLATE compression for ANNOUNCE_BROADCAST and namespace response fields.

✨ Finishing Touches

✨ Simplify code

• Create PR with simplified code
• Commit simplified code in branch codex/namespace-deflate

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands.}