diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5c75a389..697ece78 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -45,6 +45,8 @@ PyPI version — not the changelog header.
   were fixed. Root README lists @backup and documents `.backupignore`; the navmap
   was corrected. The shipped root `/.backupignore` was realigned to
   `BUILTIN_IGNORES` (dropped stale `.backup_system/` + over-broad `*logs`).
+  @memory and @flow READMEs now cross-reference their `.backup/` writes, and the
+  orphaned `prax/.backupignore` (a stale per-branch config) was removed.
 
 ## [2026-06-23]
 
diff --git a/src/aipass/flow/README.md b/src/aipass/flow/README.md
index 42413763..369fae7b 100644
--- a/src/aipass/flow/README.md
+++ b/src/aipass/flow/README.md
@@ -146,6 +146,8 @@ On `drone @flow close`:
 
 Vector verification displays in console: "Vectorized: N chunks in chroma" or "NOT vectorized".
 
+Closed plans are archived to `<repo-root>/.backup/processed_plans/`, a shared runtime namespace managed by `@backup` (see `src/aipass/backup/README.md`) and consumed by `@memory` for vectorization.
+
 ---
 
 ## Integration Points
diff --git a/src/aipass/memory/README.md b/src/aipass/memory/README.md
index 0bd04cbf..d00c5571 100644
--- a/src/aipass/memory/README.md
+++ b/src/aipass/memory/README.md
@@ -87,6 +87,8 @@ detector.check_all_branches()        # scan AIPASS_REGISTRY.json + external regi
   → trim source file                 # write back with oldest removed
 ```
 
+Rollover writes safety copies (`rollover_backup_*.json`) into `<branch>/.backup/` — a shared runtime namespace (see `@backup`'s README for all writers).
+
 ### Subprocess Isolation
 
 All ML operations (fastembed, chromadb) run via subprocess. The main process never imports these libraries. Python interpreter resolved via `_get_memory_python()` (env var `AIPASS_MEMORY_PYTHON` → `memory/.venv/bin/python` → `sys.executable`).
diff --git a/src/aipass/prax/.backupignore b/src/aipass/prax/.backupignore
deleted file mode 100644
index aef1a733..00000000
--- a/src/aipass/prax/.backupignore
+++ /dev/null
@@ -1,39 +0,0 @@
-# Backup System ignore patterns (gitignore-style)
-# Lines starting with # are comments. Blank lines are ignored.
-
-# Backup system's own directory
-.backup_system/
-
-# Version control
-.git/
-.svn/
-.hg/
-
-# Python
-__pycache__/
-*.pyc
-*.pyo
-*.egg-info/
-.venv/
-venv/
-.tox/
-
-# Node
-node_modules/
-
-# IDE
-.vscode/
-.idea/
-*.swp
-*.swo
-
-# OS
-.DS_Store
-Thumbs.db
-
-# Build artifacts
-build/
-dist/
-
-# Logs
-*.log