multicc-sync

Two Claude accounts on one Mac, one session list. Sign out of the Claude desktop app and into another account and every Claude Code session disappears from the sidebar. Nothing was deleted: transcripts live in ~/.claude/projects and are shared, but the app keeps a separate list of sessions per account. mccsync makes both accounts list the same sessions, and keeps them in step afterwards: renames, archives and deletions made in one account carry over to the other.

It never touches transcripts, never reads tokens, and makes no network calls. Every write is preceded by a backup.

Install

uv tool install multicc-sync

Python 3.11 or newer. For the MCP server as well, install multicc-sync[mcp].

Use

Quit the Claude app, then:

mccsync

That is the whole update. The first run takes the union of both accounts; later runs carry across whatever changed on either side since the previous run, and say so entry by entry.

mccsync -n                  # show the plan, write nothing
mccsync list                # every account and what it lists
mccsync find "case study"   # locate a session in any account, with its transcript path
mccsync adopt               # list terminal-only sessions in the app (experimental)
mccsync restore             # put back the last backup

mccsync --help lists the rest, including --keep-deleted and --accounts A,B for machines with more than two accounts.

For agents, mccsync-mcp is a stdio MCP server with four tools: find_sessions, list_accounts, sync_sessions and terminal_only_sessions. Register it in Claude Code with claude mcp add multicc-sync -- mccsync-mcp. The repository carries a matching skill in skills/session-sync.

The app's session index is not a documented interface. This tool was written against Claude desktop 1.49585.0 on macOS and checks the directory layout before every run; if the app changes it, mccsync stops rather than guesses. Windows and Linux paths are present but untested.

MIT license.