[JarryShaw]

• Searched for similar pull requests
• Followed the coding style
• make test passes, and a test case covers the change
• Changelog entry: N/A — centralised in docs(changelog): shared 1.5.0 changelog — long-lived, merges last (#610, #616, #617, #618, #620) #657

What is the purpose of your pull request?

• docs — documentation only

---

Description

Per the owner's ruling, IPv6_GenericExt shipped in no release, beta or final, so neither the docs nor the tests need to mention it. A moved name keeping no alias is already the general rule.

• Page: removes the section "The Retired IPv6_GenericExt Name" from contributing/conventions/extension-header-subclassing.rst. Nothing linked to it.
• Tests: removes RetiredNameTests from tests/project/test_conventions_doc_claims.py, along with its docstring bullet and the sibling docstrings that pointed at it. IPv6_Ext is still exercised by test_ipv6_ext_unit.py.
• Grep: git grep GenericExt returns nothing.
• Tests run: test_conventions_doc_claims, test_docs_*, test_ipv6_ext_unit and the docstring contract give 139 passed.
• Three private test-only names, also absent from every release tag (the owner extended the ruling to them):
  • _PeekableStream: dropped from test_io_stream_proxies_1516_unit's docstring.
  • _TCPSegment: dropped from test_pcap_tcp_segment_public_1570_unit's docstring and from its hasattr loop. The _tcp_segment checks stay.
  • _can_seek: test_can_seek_is_exported_and_the_private_name_is_gone becomes test_can_seek_is_exported. The absence assertion is gone, and the __all__ check stays.
• Grep: git grep -nw -e _PeekableStream -e _TCPSegment -e _can_seek returns nothing.
• Tests run: the three files plus conventions, test_docs_*, the docstring contract and the tier guard give 267 passed.

[JarryShaw]

Review: GOOD TO GO at d319142ef (Sonnet).

• Never shipped: git log --tags -S IPv6_GenericExt gives only b3551cb63 (add) and 93cf940b3 (rename). Both are contained in exactly the same tags (v1.5.0b7 onwards), so no release carries the name.
• No dangling pointers: git grep GenericExt, RetiredName and two-sided all return nothing, and the removed section had no label.
• Docstrings: the rewording ("a forbidden role") matches AenumRoleExclusionTests. The page flows from "Explicit Base Declarations" straight into "ESP's Two Facts".
• Tests: conventions, test_docs_*, test_ipv6_ext_unit and the docstring contract give 139 passed.

[JarryShaw]

Review: GOOD TO GO at b6bd390d0 (Sonnet delta review of d319142ef→b6bd390d0).

• Never shipped: for each name, the adding and removing commits are contained in exactly the same tags. _PeekableStream and _TCPSegment first appear in v1.5.0b9, and _can_seek only in conda-1.5.0b14+1. git grep at those tags is empty, so no release tree carried any of them.
• _TCPSegment: only that pair left the hasattr loop. Both _tcp_segment absence checks stay.
• _can_seek: test_can_seek_is_exported keeps its __all__ check, and the docstring matches.
• Tests: the three files plus the tier guard give 158 passed. The grep for all three names is empty.

[github-actions]

Coverage: 91.56% (unit tier, Python 3.15, b6bd390d0, Unit Tests run success)

Package	Statements	Missed	Branches	Partial	Cover
pcapkit (top level)	104	4	20	2	95.16%
pcapkit/const	19599	881	2618	867	92.11%
pcapkit/corekit	2589	74	816	37	96.51%
pcapkit/dumpkit	282	3	102	3	98.44%
pcapkit/foundation	2994	23	1038	25	98.81%
pcapkit/interface	138	4	52	3	96.32%
pcapkit/protocols	17433	218	4584	185	98.15%
pcapkit/toolkit	869	36	298	10	95.20%
pcapkit/utilities	504	7	146	5	98.15%
pcapkit/vendor	4432	1988	1018	167	51.87%

Per-file detail: the coverage-html artifact of this run.

[JarryShaw]

Ready to merge at b6bd390d0. Owner ruling: names that shipped in no release (IPv6_GenericExt, plus the test-only _PeekableStream, _TCPSegment and _can_seek) need no mention.

• Review: Sonnet GOOD TO GO, then a delta review of the fold-in.
• CI: all checks complete, Required checks passed SUCCESS, 0 failed.
• KTLO: 12 legs, no warnings.
• Ordering: merged into main and run. project leg: 2351 tests, 0 failures.
• Conflicts: none against the current main.