Expand independent escape routes and finite site discovery

docs/runtime-testing.md

@@ -63,3 +63,11 @@ Pass `--project core --smoke victory` to `headless_workbench.py` to compile only
 Use `--project core --smoke startup-failure --rounds 1` only for the negative-path fixture. It changes the test's in-memory faction catalog to an invalid combination, verifies that services stop and no players/sites/stock spawn, checks the administrator-visible reason and rejects further progression. The normal startup ERROR is expected in this test and is preserved in the native report. No source configuration or external mission is modified. This fixture does not restart, so exactly one round is required.
 
 The Core victory fixture also holds its actual player character unconscious for 35 seconds at the radio, longer than the all-dead grace period. It checks that the physical survivor still prevents defeat, cannot advance radio progress, retains control/camera, and resumes defence after consciousness is restored without receiving another life. This uses the native controller's consciousness transition; it does not validate treatment animations, medical item consumption, bleeding or a remote revive action.
+
+## Alternate scavenging route and visual discovery
+
+Use `--project core --smoke cache-loss --rounds 2 --timeout 480` with the hidden runner. The fixture deletes the southern supply crate before taking any documents, then completes escape using the western cache. It verifies that neither deleted nor depleted stock is recreated, including across the usual preparation query. Both repeated rounds must independently start with fresh configured sites.
+
+Core victory and cache-loss fixtures also inspect the three outpost barriers for upright placement and actual collision. At the medical stash they test unconsciousness, distance, a temporary physical wall, clear visibility and one discovery event. Only the fixture adds/removes that isolated wall; production discovery changes knowledge without changing scenery. The cache-loss variant uses the alternate documents, while the normal victory variant uses the original southern cache.
+
+`--project core --smoke site-survey --rounds 1` prints a bounded terrain and obstacle survey for three areas without changing existing scenery. Candidate grid checks are placement diagnostics, not navigability or encounter-balance acceptance. Existing authored successor objects can now appear as obstacles in a repeated survey.