row 206 r4 (#1704): BUILD.md records the slot rebase onto 17f415792 (269, 282 landed) and the drift sweep

agents/launchpad/work/queue-206/BUILD.md

@@ -16,6 +16,19 @@ sections 4.3, 5.2-5.6 and 8. Reviewer: Duckworth. Assignment: sage-2789.
   BUILD-LOG.md, packages/cli/tests/{case-sudo-fixture.mjs, case1-accept.test.mjs,
   case2-unit.test.mjs}, packages/webui/README.md and scripts/{case1-accept.sh, case2-unit.sh}.
   None is a 275 or 206 path, and no bus test, stack-release.test or stack-release.sh reads them.
+- Round 4 (slot rebase, sage-2959): 275 landed, then 269 (efcc9ea8d) and 282 (647424442), and
+  refactor is 17f415792. 206 is rebased onto it as launchpad/row206-17f4. 275's three commits drop
+  out as already applied, and the seven 206 commits apply clean. Sweep 3410df7c3..17f415792 over
+  packages/ and scripts/: broker.mjs (269: the launcher's `#threadRows` reads one row per session,
+  and `idle`; no share, read or grant code), sessions.test.mjs (269: `refusedOnce` checks
+  actor_run; 206's hunks are the three '3l'→'3m' pins at T7 and engine3k, which still apply),
+  end-launch.test.mjs, cli launcher and session-launch tests, seat session and sandbox, and tasks
+  requirements. None reads a share table or the schema version. schema.sql, store.mjs, the
+  migration tests, schema.test, stack-release.sh and stack-release.test are unchanged since 48e450ce8,
+  so SCHEMA_VERSION on refactor is still '3l', the label 3l→3m stands, the table and trigger pins
+  and COUNTED/LISTED lists stand, and fixtures/schema-3l.sql still equals refactor's schema.sql
+  byte for byte. engine3k's strip regex starts at 264a's step comment and ends at the list's close,
+  so it cuts 206's step too, as before.
 - 275 gives `VIEWER_VERBS`, `userLevel(verb)` and verb-aware `#granted`/`#grantedThread`, and
   `#userGrants` keeps a live grant of any level, so a viewer binds. On the rebase:
   - USER_VERBS keeps 275's block and gains the three share verbs. They are not in VIEWER_VERBS,