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fix(ssh): keep github.com connection alive through slow pre-push hooks #59

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github-actions merged 1 commit into from
Aug 29, 2026
Merged

fix(ssh): keep github.com connection alive through slow pre-push hooks #59

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10 changes: 10 additions & 0 deletions .ssh/config
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Original file line number Diff line number Diff line change
Expand Up @@ -4,3 +4,13 @@ Host github.com
User git
IdentityFile ~/.ssh/github_ed25519
IdentitiesOnly yes
# git push opens this connection BEFORE running the pre-push hook, then
# leaves it fully idle for the hook's entire duration. Found 2026-08-29:
# under heavy concurrent machine load (~80 sessions), hooks routinely ran
# long enough that GitHub's idle-connection timeout killed the SSH session
# while the hook was still running — the push then silently failed to
# transfer after printing "Safe to push," with only a stray "Connection to
# github.com closed by remote host." in the log to explain it. Active
# keepalives during that idle window prevent the drop.
ServerAliveInterval 30
ServerAliveCountMax 10