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fix(openssh): close residual regress compatibility gaps #314
Description
Part of #275. Follow-up to #313.
Context
The final OpenSSH V_10_3_P1 compatibility runs for #313 reached the epic gate on both CI platforms:
- macOS: 60 passed out of 66 eligible tests, 6 failed, 7 environmental, 6 skipped
- Ubuntu: 61 passed out of 69 eligible tests, 8 failed, 4 environmental, 6 skipped
This issue keeps every remaining candidate-only failure explicitly tracked after the epic closes. It does not reclassify environmental failures or reduce the committed score floor.
Remaining candidate failures
| Test | macOS | Ubuntu | First observed gap |
|---|---|---|---|
agent-restrict |
fail | fail | candidate key generation path |
dynamic-forward |
fail | fail | dynamic forwarding startup and SOCKS coverage |
hostkey-agent |
fail | fail | Ed25519 host-key agent behavior |
multiplex |
fail | fail | unsupported -O conninfo and remaining control operations |
percent |
fail | fail | percent expansion in match/exec handling |
proxyjump |
fail | fail | basic parsing and multi-hop behavior |
rekey |
environmental | fail | Ubuntu candidate timeout |
scp3 |
environmental | fail | Ubuntu remote-to-remote copy behavior |
The uploaded result tables classify channel-timeout, connection-timeout, forwarding, and sftp-badcmds as environmental on both platforms. macOS additionally classifies forward-control, rekey, and scp3 as environmental because the reference client fails in the same environment. The six upstream skips remain unchanged.
Scope
- reproduce each candidate-only failure against the pinned harness
- fix compatibility gaps without weakening fixture validation or score floors
- split independent implementation areas into linked issues when a focused fix is safer
- retain reference-client evidence for platform-specific environmental classifications
Acceptance criteria
- Every listed candidate-only failure either passes on both supported CI platforms or has a narrower linked issue with reproduction evidence.
- The committed eligible-result floors are not lowered to hide a regression.
- macOS and Ubuntu result artifacts identify all remaining fail, environmental, and skip verdicts.
Activity