Reuse completed Google embeddings and resume semantic staging

SKILLS.md

@@ -73,6 +73,17 @@ SEARCHI_GEMMA_MODEL_DIR and SEARCHI_GEMMA_WORKER, then run:
 cargo test -p searchi-semantic --test gemma_cpu -- --ignored --nocapture
 ```
 
+Incremental reuse/recovery additionally requires verified CPU FFmpeg helpers in
+SEARCHI_TEST_FFMPEG and SEARCHI_TEST_FFPROBE. Run the actual Google integration:
+
+```sh
+cargo test -p searchi-service --test incremental_google_cpu --test google_cpu --locked -- --ignored --nocapture --test-threads=1
+```
+
+Completed-group reuse must preserve actual vector bytes and remap current source
+citations. Do not substitute simulated vectors or treat zero encoder calls as a
+foreground latency benchmark. See docs/INCREMENTAL-SEMANTIC.md for remaining gates.
+
 Record actual outputs, hardware, corpus size, background preparation, first-input
 latency and warm latency in the relevant validation report. Unexecuted platform
 checks stay open. Compilation alone is not UI interaction verification.