Role: fresh-context correctness/security critic.
Objective: review the current diff for backlog 101 and identify blocking bugs
in lane-harness validation, projection materialization, receipt fields, or
dispatch child environment handling.

Scope: read-only. Use `git diff -- .` and the backlog packet. Focus on:
global skill leakage, path escapes, symlink safety, real HOME mutation, receipt
schema compatibility, failure-kind correctness, and whether tests prove the
visible-skill boundary.

Output shape: <=50 lines:
- blocking findings with file/function references;
- non-blocking concerns;
- tests or gates still required;
- verdict: accept / accept-with-fixes / reject.

Do not edit files. Do not browse. Do not repeat the implementation summary.
