[BUG] Can't restore session when the user name (or more specifically, the home directory) has a period (".") in it, as claude associates the session with a non-existent path/project (the period is replaced with a slash)

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

When Claude Code records a session (at least on macOS), it creates (if it hasn't already been created) a per-project directory under ~/.claude/projects by taking the path of the project and replacing (presumably) the non-word characters with dashes ("-"). When a session is _read_, the dashes are replaced with slashes ("/") in attempts to recover the associated path.

However, this behavior is fundamentally broken.

Consider my user name: charles.strahan

And consider a project path like: /Users/charles.strahan/src/myawesomeproject

This results in session paths like this: /Users/charles.strahan/.claude/projects/-Users-charles-strahan-src-myawesomeproject/${SESSION_ID}.jsonl

When I then attempt to resume a conversation, the conversation in /Users/charles.strahan/src/myawesomeproject won't show up in the resume-session picker UI, because Claude Code thinks those sessions are associated with /Users/charles/strahan/src/myawesomeproject, _not_ /Users/charles.strahan/src/myawesomeproject.

If I try to resume by launching claude code via claude --resume "${SESSION_ID}", that doesn't work either (for the same reason).

The only way I could get session resumption to work is by doing:

sudo mkdir /Users/charles
sudo chown "charles.strahan" /Users/charles
mkdir /Users/charles/strahan
ln -s /Users/charles.strahan /Users/charles/strahan

And then I can:

cd /Users/charles/strahan/src/myawesomeproject
claude --resume "${SESSION_ID}"

A couple things this isn't:

1. This is _not_ an acceptable workaround.
2. This is _not_ a matter of me using an unreasonable/invalid user name. It is incredibly common, especially in organizations where laptops/users/email-addresses/etc are centrally managed, for user names to be in the form of "${FIRST_NAME}.${LAST_NAME}". In fact, that is the case for me: my employer's policy is such that my user name _must_ be charles.strahan.

What Should Happen?

1. The session picker UI for /resume (in both the TUI and in vscode) should find the sessions for the current project (currently, it doesn't).
2. The claude --resume "${SESSION_ID}" command should work (currently, it doesn't).

Error Messages/Logs

Steps to Reproduce

1. Create/have a user name (or more specifically, a home directory) with a period in it.
2. Open claude code somewhere under your user's home directory.
3. Start a sessions.
4. Close that session.
5. Still within that same directory, try to resume the previous session.
6. Notice that the last step ended in failure to resume.

Claude Model

_No response_

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.221 (Claude Code)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

VS Code integrated terminal

Additional Information

_No response_