Feature Request: Option to disable auto-stash on session crash/teleport

Summary

Claude Code automatically runs git stash when a session crashes or during Teleport branch switches. This silently destroys uncommitted work in multi-agent environments where multiple Claude instances share a git worktree.

Problem

In our setup, we run a supervisor agent that periodically restarts. Each restart triggers Claude Code's auto-stash mechanism, which:

1. Runs git add on all untracked files
2. Runs git stash push --message "..." on the entire working tree
3. Silently removes all uncommitted changes from the working tree

In a single session this is fine. In a multi-agent team where agents share a worktree, this is catastrophic:

• Today alone, 5 supervisor crashes created 5 auto-stash entries that wiped 4 research documents, 969 lines of evolution framework code, and 104 files of changes
• The stash entries are invisible to other agents — they see a clean working tree and assume the work was never done
• The auto-stash message template (auto-stash: agent {role} ({sessionId}) crashed at {ts}) is injected by the CC SDK session teardown, not by our code

Evidence

stash@{0}: On Human-ui: auto-stash: agent supervisor (...) crashed at 2026-06-07T14:24:31.472Z
stash@{1}: On Human-ui: auto-stash: agent supervisor (...) crashed at 2026-06-07T14:13:17.359Z
stash@{2}: On Human-ui: auto-stash: agent supervisor (...) crashed at 2026-06-07T13:46:46.883Z
...24 total entries across 6 branches spanning 5/15-6/07

The stash function gr8 in cli.js:

gr8 = async (q) => {
  let K = q || `Claude Code auto-stash - ${new Date().toISOString()}`;
  let {untracked: _} = await Q38();
  if (_.length > 0) await a8(h7(), ["add", ..._]); // stages ALL untracked files
  let {code: Y} = await a8(h7(), ["stash", "push", "--message", K]);
  return Y === 0;
}

Requested Solution

Add a configuration option to disable or replace auto-stash behavior:

// ~/.claude/settings.json
{
  "git": {
    "autoStash": false  // or "log-only"
  }
}

false: On crash, log dirty state but do NOT stash. Leave working tree dirty (visible, not hidden).
"log-only" (default for safety): Same as false but also write a .claude/crash-dirty-state.log with git status output.

This follows the principle that visible dirty state is better than invisible stash — other agents and users can see the uncommitted changes and decide what to do.

Workaround

We're adding a heartbeat-based cleanup in our daemon that detects auto-stash entries and pops them, but this is reactive and allows a window where the stash exists and other agents see a clean tree.

Environment

• Claude Code CLI (latest, via npx)
• macOS, multi-agent team via Aha SDK
• Git worktree-based setup with shared working directory