diff --git a/skills/objectstack-data/SKILL.md b/skills/objectstack-data/SKILL.md
index 2d2bd842280..7220a34363d 100644
--- a/skills/objectstack-data/SKILL.md
+++ b/skills/objectstack-data/SKILL.md
@@ -374,8 +374,8 @@ indexes: [
 > **`type` and `partial` were retired at protocol 17**: no driver
 > ever read either, so an authored `type` chose no access method and an authored
 > `partial` produced a full index with the predicate discarded. Both are now a
-> `tsc` error and a parse error; `os migrate meta --from 16` strips them. Access
-> methods and partial predicates are database-layer migrations.
+> `tsc` error and a parse error; `os migrate meta --from 16` lists the edits;
+> `--write` applies the ones it can prove, the rest by hand.
 
 > **A unique index must state its scope** — `'organization'` (one holder per
 > organization, NULL-safe) or `'global'` (one holder across the installation).
diff --git a/skills/objectstack-data/rules/indexing.md b/skills/objectstack-data/rules/indexing.md
index 1e02314ba24..72b02e1e098 100644
--- a/skills/objectstack-data/rules/indexing.md
+++ b/skills/objectstack-data/rules/indexing.md
@@ -28,8 +28,9 @@ and it is the whole surface *because* it is all the driver materializes:
 > selected no access method, and an authored `partial` produced a **full**
 > index with the predicate silently discarded. Writing either is now a `tsc`
 > error and a parse error carrying the migration prescription; run
-> `os migrate meta --from 16` to strip them automatically. What to do instead
-> is the subject of "Access methods and partial indexes" below.
+> `os migrate meta --from 16` to list the mechanical edits; `--write` applies
+> the ones it can prove, and you apply the rest by hand. What to do instead is
+> the subject of "Access methods and partial indexes" below.
 
 ## Syntax