perf(web): add idempotent batch verification fast paths

my-tools/README.md

@@ -13,6 +13,8 @@ commit and push.
   a missing scheduler and stops on a terminal or blocked checkpoint.
 - `show_blender_web_scheduler.py`: delegates live RUNNING/IDLE/BLOCKED state to
   `tools/web/print-wbv2-live-status.mjs`.
+- `validate_incremental_context.py`: validates only the active batch metadata;
+  unchanged inputs return `incremental-context-ok ... context=REUSED`.
 - `start_unattended.sh`: launches the scheduler and watchdog with `nohup` and
   `setsid` for process-level continuity.
 - `check_continuation_state.py` and `validate_web_context.py`: read-only WBV2
@@ -60,6 +62,12 @@ For machine-readable live state:
 python3 my-tools/show_blender_web_scheduler.py --json
 ```
 
+Implementation cycles use a bounded fast path: each module manifest carries a
+stable `batchId` and selected record IDs, context metadata compares
+`bytes`/`mtime_ns` before hashing, and the outer scheduler owns planner and
+continuation rotation. Full API, format, Chromium, performance and release
+gates remain an explicit final-audit operation.
+
 `--commit --push` is enabled by the launcher and can be disabled for a local
 dry run with `WBV2_AUTO_COMMIT=0 WBV2_AUTO_PUSH=0`.