What

claude re-launch starts a fresh conversation. Resuming requires claude --resume <session-id>. Adds two paths to make tmux-resurrect resurrect claude panes correctly:

1. Basic mode (zero claude-side install): a restore strategy that picks the most recent session for the pane's saved cwd from ~/.claude/projects/ and emits the matching --resume command.
2. Per-pane mode (recommended for multiple parallel sessions in the same cwd): a SessionStart hook plus claude-aware save strategy that capture session identity per pane at save time.

How

Basic mode. Claude Code stores sessions at ~/.claude/projects/<encoded-cwd>/<uuid>.jsonl, where the encoded cwd is the absolute path with / replaced by -. strategies/claude_default.sh reproduces that encoding, picks the newest *.jsonl by mtime, strips the extension to recover the UUID, and emits claude --resume <uuid>. Falls back to the originally captured command when no session exists.

Per-pane mode. Basic mode collapses parallel same-cwd sessions to one. To map each pane to its own session:

• extras/claude/track-session.sh: a SessionStart hook installed in ~/.claude/settings.json. At session start it reads session_id and cwd from the hook payload and writes ~/.claude/runtime/<claude-pid>.json. Garbage-collects sidecars older than 7 days. Requires python3.
• save_command_strategies/claude_aware.sh: drop-in replacement for the default ps save strategy. For non-claude commands it behaves identically to ps.sh. For claude panes it looks up the sidecar by claude PID and rewrites the captured command to claude --resume <uuid>, so the resurrect record stores explicit session identity per pane.

strategies/claude_default.sh detects an existing --resume/--continue in the captured command and passes it through unchanged, so per-pane mode survives restore.

Configuration

Opt-in. Not added to the default process list.

Basic mode:

set -g @resurrect-processes 'claude'
set -g @resurrect-strategy-claude 'default'

Per-pane mode (in addition):

set -g @resurrect-save-command-strategy 'claude_aware'

Plus the SessionStart hook in ~/.claude/settings.json pointing at extras/claude/track-session.sh. Setup walked through in docs/restoring_claude_code_sessions.md.

Caveats

• Per-pane mode requires the hook to have fired. Sessions started before installation fall back to basic mode.
• The hook keys the sidecar by $PPID. Wrapper scripts between claude and the hook can throw this off.
• The / to - encoding tracks Claude Code's current on-disk layout. A future Claude Code release that changes the scheme breaks basic mode (per-pane mode is unaffected).

Upstream

The right long-term fix is for Claude Code to expose the running session ID externally (process env or runtime state file). Filed at anthropics/claude-code#63758. Once that lands, the hook becomes unnecessary.

Testing

• claude running in a pane, save (prefix + Ctrl-s), kill tmux server, restart, restore (prefix + Ctrl-r): pane comes back attached to the prior session (basic mode, verified).
• Fresh project dir with no ~/.claude/projects/<encoded>/ entry: strategy emits bare claude.
• Original command claude --dangerously-skip-permissions with no prior session: flags preserved on fallback.
• Restore strategy passthrough for explicit --resume <id>, --continue, and combined-with-flags forms: verified.
• Per-pane mode end-to-end (hook fires, sidecar written, save strategy reads): logic verified standalone. Full reboot cycle not yet exercised.