Git LFS结合GitHub SSH推送失败，大文件未被追踪求助

环境版本 #

> git version
git version 2.39.3 (Apple Git-145)
> git lfs version            
git-lfs/3.6.1 (GitHub; darwin arm64; go 1.23.4)

操作流程及问题 #

新建无提交记录的仓库后，按以下步骤操作：

> git init
> git lfs track "*.db"
> cat .gitattributes 
*.db filter=lfs diff=lfs merge=lfs -text
> git add .gitattributes
> git commit -m "init"
...
> git add mybigfile.db
> git lfs status
On branch main

Objects to be committed:

    mybigfile.db (Git: 09539d3)

Objects not staged for commit:


> git commit -m "add .db"
...
> git lfs ls-files
(无输出)
> git remote add origin git@github.com:username/myrepo.git 
> git push -u origin main

推送时触发大文件超限错误：

remote: error: Trace: 8f76...
remote: error: File mybigfile.db is 157.89 MB; this exceeds GitHub's file size limit of 100.00 MB
remote: error: GH001: Large files detected. You may want to try Git Large File Storage.
To github.com:username/myrepo.git
 ! [remote rejected] main -> main (pre-receive hook declined)
error: failed to push some refs to 'github.com:username/myrepo.git'

已尝试的操作 #

开启调试日志执行推送：

GIT_TRACE=1 git push (或 GIT_CURL_VERBOSE=1);

得到错误日志：

20:43:44.031634 trace git-lfs: pure SSH connection unsuccessful (#0)
20:43:44.031676 trace git-lfs: pure SSH protocol connection failed (upload, origin): Unable to negotiate version with remote side (unable to read capabilities): EOF
Failed to connect to remote SSH server: Invalid command: git-lfs-transfer ThomasJannaud/app-langues.git upload
  You appear to be using ssh to clone a git:// URL.
  Make sure your core.gitProxy config option and the
  GIT_PROXY_COMMAND environment variable are NOT set.

• 参考过git代理配置及Git LFS SSH连接相关问题
• 单独执行ssh git@github.com "git-lfs-authenticate xxx/myrepo.git upload"返回正常授权JSON及200状态码
• 已配置全局替换规则：git config --global url.https://github.com/.insteadOf git://github.com/

当前困惑 #

1. 严格按标准流程操作，但git lfs ls-files无输出，.db文件未被LFS追踪
2. 推送触发大文件超限错误，证实文件未通过LFS上传
3. 单独验证SSH的Git LFS授权命令有效，但推送过程中Git LFS的SSH连接失败

更新信息 #

远程仓库地址配置：

> git remote -v     
origin  git@github.com:username/myrepo.git (fetch)
origin  git@github.com:username/myrepo.git (push)

完整Git配置列表：

> git config --list --show-origin
file:/Applications/Xcode.app/Contents/Developer/usr/share/git-core/gitconfig    credential.helper=osxkeychain
file:/Applications/Xcode.app/Contents/Developer/usr/share/git-core/gitconfig    init.defaultbranch=main
file:/Users/thomas/.gitconfig   user.name=Thomas
file:/Users/thomas/.gitconfig   user.email=myemail@...
file:/Users/thomas/.gitconfig   url.https://github.com/.insteadof=git://github.com/
file:.git/config        core.repositoryformatversion=0
file:.git/config        core.filemode=true
file:.git/config        core.bare=false
file:.git/config        core.logallrefupdates=true
file:.git/config        core.ignorecase=true
file:.git/config        core.precomposeunicode=true
file:.git/config        lfs.repositoryformatversion=0
file:.git/config        remote.origin.url=git@github.com:username/myrepo.git
file:.git/config        remote.origin.fetch=+refs/heads/*:refs/remotes/origin/*
file:.git/config        branch.master.remote=origin
file:.git/config        branch.master.merge=refs/heads/master

内容的提问来源于stack exchange，提问作者Thomas