fix: keep root memory uppercase (#70621)

Thanks @mbelinky.

docs/concepts/memory-qmd.md

@@ -52,8 +52,7 @@ legacy `--mask` collection flags and older MCP tool names when needed.
   configured `memory.qmd.paths`, then runs `qmd update` + `qmd embed` on boot
   and periodically (default every 5 minutes).
 - The default workspace collection tracks `MEMORY.md` plus the `memory/`
-  tree. Lowercase `memory.md` remains a bootstrap fallback, not a separate QMD
-  collection.
+  tree. Lowercase `memory.md` is not indexed as a root memory file.
 - Boot refresh runs in the background so chat startup is not blocked.
 - Searches use the configured `searchMode` (default: `search`; also supports
   `vsearch` and `query`). If a mode fails, OpenClaw retries with `qmd query`.

docs/concepts/system-prompt.md

@@ -109,7 +109,7 @@ Bootstrap files are trimmed and appended under **Project Context** so the model
 - `USER.md`
 - `HEARTBEAT.md`
 - `BOOTSTRAP.md` (only on brand-new workspaces)
-- `MEMORY.md` when present, otherwise `memory.md` as a lowercase fallback
+- `MEMORY.md` when present
 
 All of these files are **injected into the context window** on every turn unless
 a file-specific gate applies. `HEARTBEAT.md` is omitted on normal runs when

docs/reference/AGENTS.default.md

@@ -49,7 +49,7 @@ cp docs/reference/AGENTS.default.md ~/.openclaw/workspace/AGENTS.md
 ## Session start (required)
 
 - Read `SOUL.md`, `USER.md`, and today+yesterday in `memory/`.
-- Read `MEMORY.md` when present; only fall back to lowercase `memory.md` when `MEMORY.md` is absent.
+- Read `MEMORY.md` when present.
 - Do it before responding.
 
 ## Soul (required)
@@ -67,8 +67,8 @@ cp docs/reference/AGENTS.default.md ~/.openclaw/workspace/AGENTS.md
 
 - Daily log: `memory/YYYY-MM-DD.md` (create `memory/` if needed).
 - Long-term memory: `MEMORY.md` for durable facts, preferences, and decisions.
-- Lowercase `memory.md` is legacy fallback only; do not keep both root files on purpose.
-- On session start, read today + yesterday + `MEMORY.md` when present, otherwise `memory.md`.
+- Lowercase `memory.md` is legacy repair input only; do not keep both root files on purpose.
+- On session start, read today + yesterday + `MEMORY.md` when present.
 - Capture: decisions, preferences, constraints, open loops.
 - Avoid secrets unless explicitly requested.