Plan M5a: local memory in 15 tasks

memoryd (files, the check, edits, journal, index, recall, serving),
the memory tools and built-in grants in brokerd, the memory block in
loopd, bxctl reindex and memory, and the device checks with memoryd.

Each task was built as a reference and gated. Each was replayed on its
own at its end state (854 to 936 tests) and mutation-checked. Each
skeleton compiles and fails its tests. Every todo comment was read
beside its signature.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

docs/plans/M5a/files/crates/proto/tests/fixtures/wire/memory_admin.json

@@ -0,0 +1 @@
+{"v":1,"id":1,"final":true,"msg":{"kind":"memory_admin","body":{"command":"undo","arg":"2026-09-24-0007"}}}

docs/plans/M5a/files/crates/proto/tests/fixtures/wire/memory_admin_reply.json

@@ -0,0 +1 @@
+{"v":1,"id":1,"final":true,"msg":{"kind":"memory_admin_reply","body":{"text":"undone: 2026-09-24-0007"}}}

docs/plans/M5a/files/crates/proto/tests/fixtures/wire/memory_block.json

@@ -0,0 +1 @@
+{"v":1,"id":1,"final":true,"msg":{"kind":"memory_block","body":{}}}

docs/plans/M5a/files/crates/proto/tests/fixtures/wire/memory_block_reply.json

@@ -0,0 +1 @@
+{"v":1,"id":1,"final":true,"msg":{"kind":"memory_block_reply","body":{"text":"# soul.md\nYou are Boxmaker.\n\n# memory.md (0 of 2,200 characters)\n(empty)\n\n# user.md (0 of 1,375 characters)\n(empty)"}}}

docs/plans/M5a/files/crates/proto/tests/fixtures/wire/memory_call.json

@@ -0,0 +1 @@
+{"v":1,"id":3,"final":true,"msg":{"kind":"memory_call","body":{"request":{"session":"mm-r0000000000000000000000001","call":3,"tool":"memory","arguments":"{\"action\":\"note\",\"text\":\"example.org says March.\"}"},"taint":"private","untrusted":true}}}

docs/plans/M5a/files/crates/proto/tests/fixtures/wire/reindex.json

@@ -0,0 +1 @@
+{"v":1,"id":1,"final":true,"msg":{"kind":"reindex","body":{}}}

docs/plans/M5a/files/crates/proto/tests/fixtures/wire/reindexed.json

@@ -0,0 +1 @@
+{"v":1,"id":1,"final":true,"msg":{"kind":"reindexed","body":{"logs":42,"records":1208,"notes":7}}}

docs/plans/M5a/files/crates/proto/tests/fixtures/wire/session_updated.json

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+{"v":1,"id":1,"final":true,"msg":{"kind":"session_updated","body":{"session":"mm-r0000000000000000000000001"}}}