Put DOCS/log.md into actual use

DOCS/index.md

@@ -16,7 +16,9 @@ here goes stale, fix the routing, not by copying content into this file.
 
 New or substantially-edited docs follow
 [the OKF documentation standard](/DOCS/standards/okf-documentation.md)
-(frontmatter + linking conventions).
+(frontmatter + linking conventions). [`DOCS/log.md`](/DOCS/log.md)
+records documentation-standard-relevant history — new ADRs, policy
+changes, structural migrations.
 
 ## Decisions
 

DOCS/log.md

@@ -0,0 +1,24 @@
+# Documentation Log
+
+Reverse-chronological record of documentation-standard-relevant changes
+across `DOCS/` — new ADRs, policy adoptions, and structural migrations.
+Routine content edits are tracked by `git log`, not here; this file is
+for changes that affect how the knowledge base itself is organized or
+governed.
+
+## 2026-08-30
+
+Adopted OKF v0.2 as the standing documentation standard. Added
+`DOCS/standards/okf-documentation.md`; `CLAUDE.md` and `DOCS/index.md`
+now point to it. New knowledge-bearing docs must comply going forward;
+legacy docs migrate opportunistically on substantial edit, not in bulk.
+See [issue #75](https://github.com/sankar-ramamoorthy/rag-foundry-universal/issues/75) /
+[PR #76](https://github.com/sankar-ramamoorthy/rag-foundry-universal/pull/76).
+
+## 2026-08-27
+
+Retrofitted `DOCS/adr/` and added `DOCS/index.md` using the frontmatter
++ `[[wikilink]]` pattern `DOCS/audit/` had already independently
+established, generalizing it into the repo's first cross-directory
+documentation convention. See
+[PR #63](https://github.com/sankar-ramamoorthy/rag-foundry-universal/pull/63).

DOCS/standards/okf-documentation.md

@@ -71,9 +71,11 @@ The spec reserves two filenames at any level of the hierarchy, which
 
 - **`index.md`** — directory listing / map-of-content. Already in use
   (`DOCS/index.md`, `DOCS/audit/00-Audit-Overview.md`).
-- **`log.md`** — chronological history of updates. Not currently used
-  anywhere in this repo; reserved here only so a future concept
-  document doesn't collide with it, not a requirement to create one.
+- **`log.md`** — chronological history of updates. In use at
+  [`DOCS/log.md`](/DOCS/log.md): a reverse-chronological record of
+  documentation-standard-relevant changes (new ADRs, policy adoptions,
+  structural migrations) — not a substitute for `git log`, and not
+  meant to capture routine content edits.
 
 ## Scope