ollie/cmd/toolsrv/internal/exec
Levi Neely 8bb5c098cc bypass: route approval through 9P instead of Unix socket
This refactors the bypass (sandbox escape) mechanism to work with remote
toolsrv deployments. Previously, bypass used a Unix socket which only
works when toolsrv runs locally. Now:

1. toolsrv exposes bypass/{pending,resolve} 9P files
   - pending: blocking read returns next bypass request as JSON
   - resolve: write JSON {id, approved, error} to complete request

2. olliesrv reads bypass/pending in a loop per session
   - Evaluates requests through the existing bypass broker
   - Policy check, rate limiting, user notification all stay in olliesrv
   - Writes approval/denial back to bypass/resolve

3. When approved, toolsrv executes the command directly (no sandbox)
   - Execution happens on toolsrv's host (local or remote)
   - Output streams back through the normal tool call path

This enables bypass to work when toolsrv is remote:
- User sees the approval notification locally
- Command executes on the remote host outside its sandbox

Architecture:
  toolsrv (remote)          olliesrv (local)
  ┌─────────────────┐      ┌──────────────────┐
  │ sandboxed cmd   │      │ bypass broker    │
  │      ↓          │      │  - policy        │
  │ bypass.Submit() │──────│  - notification  │
  │      ↓          │ 9P   │  - rate limit    │
  │ wait for result │←─────│  - user approval │
  │      ↓          │      └──────────────────┘
  │ execute direct  │
  └─────────────────┘
2026-08-12 08:48:32 +02:00
..
exec.go bypass: route approval through 9P instead of Unix socket 2026-08-12 08:48:32 +02:00