[abruption]

Problem

PR #71 was merged into its stacked base branch after #70 had already merged. GitHub therefore marked #71 merged, but commit 382d8ba never reached main.

Result

This PR reapplies the reviewed #71 change as one commit directly on current main:

• read-only local/SSH doctor diagnostics
• structured Claude/Codex local/SSH Reply-To URIs
• same-machine local route normalization
• opt-in reverse SSH verification
• documented No way to wait for a reply #31 decision to defer unsafe transcript-based waiting

The tree change is the same implementation reviewed in #71. No new behavior was added during the reapplication.

Closes #45
Closes #31

Validation

• original implementation CI: run 35058820151, all jobs passed
• local suite: 239 tests passed
• wheel and sdist built successfully
• real SSH doctor and reverse-route classification verified in feat: add doctor and structured reply routes #71