diff --git a/README.md b/README.md
index 83aa3084..9e1045ba 100644
--- a/README.md
+++ b/README.md
@@ -145,18 +145,6 @@ the container as environment variables. Common options:
   replace the whole dist. Paths with leading `/` or `..` segments are
   rejected at eval time.
 
-- **`hyperhive.matrix.enable`** — Boolean (default `true`). When true,
-  each agent container runs `hive-matrix-daemon` (a long-running
-  matrix-sdk process that holds the per-agent client + sync) and
-  auto-injects `hive-matrix-mcp` as a stdio MCP server so claude can
-  call the matrix tools (`mcp__matrix__send_message`, `send_dm`,
-  `send_reaction`, `send_reply`, `mark_read`, `list_rooms`,
-  `list_room_members`, `read_room`; `room` args accept both
-  `!id:server` and `#alias:server` forms). Silently no-ops when
-  `<state>/matrix-token` is absent (i.e., the host-level
-  `hyperhive.matrix` tuwunel container hasn't provisioned the account
-  yet). Set to `false` to opt a specific agent out of matrix.
-
 See `nix/templates/harness-base.nix` for the full list of options and
 their descriptions.
 
diff --git a/docs/turn-loop.md b/docs/turn-loop.md
index de3c3297..5b5c64b8 100644
--- a/docs/turn-loop.md
+++ b/docs/turn-loop.md
@@ -284,33 +284,6 @@ Identity = socket: anything that can connect to
 which is fine because the bind-mount is the agent's own
 container only.
 
-### Built-in matrix MCP (`mcp__matrix__*`)
-
-When `hyperhive.matrix.enable = true` (default) and the host-level
-matrix tuwunel is configured, the harness auto-injects `hive-matrix-mcp`
-as a second stdio MCP server. Tools land as `mcp__matrix__<name>`:
-
-- `send_message(room, body)` — send a markdown message; `room` accepts
-  `!id:server` or `#alias:server`, daemon resolves either
-- `send_dm(user_id, body)` — send a direct message to a matrix user
-- `send_reaction(room, event_id, key)` — react to a message
-- `send_reply(room, event_id, body)` — threaded reply
-- `mark_read(room, event_id)` — advance the read receipt
-- `list_rooms()` — enumerate joined rooms
-  (`{ id, canonical_alias, name, member_count }` per room)
-- `list_room_members(room)` — members of a room
-- `read_room(room, limit?)` — recent timeline events
-
-The daemon (`hive-matrix-daemon`) holds the long-running matrix-sdk
-`Client` + sync loop; the stdio bridge (`hive-matrix-mcp`) is spawned
-per turn and forwards tool calls over `/run/hive-matrix.sock`. Both
-silently exit when `<state>/matrix-token` is absent (account not yet
-provisioned). Incoming room events wake the agent via `AgentRequest::Wake`
-with `from: "matrix"` and a teaser body
-(`[matrix] <sender> in <room>: <first-100c>…` where `<sender>` is
-the matrix user id and `<room>` is the alias or id as reported by
-the SDK).
-
 ### Extra MCP servers (per-agent)
 
 Each agent's NixOS config can declare additional MCP servers via