diff --git a/docs/w2.dot b/docs/w2.dot
new file mode 100644
index 0000000..1cc1b54
--- /dev/null
+++ b/docs/w2.dot
@@ -0,0 +1,126 @@
+digraph {
+        /* new idea */
+
+        foo [label="whole\ncode"]
+        foo -> S1
+        allocation -> S1B
+        interactive -> S1B
+
+        {rank=same; S1 S1B}
+        S1 [label="1: know nothing"]
+        S1B [label="1: know nothing\n(bound)"]
+
+        S1 -> S1B [label="connect()"]
+        S1B -> S1 [label="lose()"]
+
+        {rank=same; S2 S2B P_claim2}
+        S2 [label="2: know nameplate\nwant claim\nunknown mailbox\nwant open"]
+        S2B [label="2: know nameplate\nwant claim\nunknown mailbox\nwant open\n(bound)"]
+        S1 -> S2 [label="set_nameplate()"]
+        S2 -> P_claim2 [label="connect()"]
+        S2B -> S2 [label="lose()"]
+        S1B -> P_claim1 [label="set_nameplate()"]
+        P_claim1 [shape="box" label="tx claim()"]
+        P_claim1 -> S2B
+        P_claim2 [shape="box" label="tx claim()"]
+        P_claim2 -> S2B
+        S2 -> P2_queue [label="M_send(msg)"]
+        P2_queue [shape="box" label="queue"]
+        P2_queue -> S2
+
+        {rank=same; S3 S3B P3_open P3_send}
+        S3 [label="3: claimed\nknown mailbox\nwant open"]
+        S3B [label="3: claimed\nknown mailbox\nwant open\n(bound)"]
+        S2 -> S3 [label="(none)" style="invis"]
+        S2B -> P_open [label="rx_claimed()"]
+        P_open [shape="box" label="store mailbox\ntx open()\ntx add(queued)"]
+        P_open -> S3B
+        S3 -> P3_open [label="connect()"]
+        S3B -> S3 [label="lose()"]
+        /*S3B -> S2 [label="lose()"]*/ /* not worth it */
+        P3_open [shape="box" label="tx open()\ntx add(queued)"]
+        P3_open -> S3B
+        /*S3B -> S3B [label="rx_claimed()"] */
+        S3B -> P3_send [label="M_send(msg)"]
+        P3_send [shape="box" label="queue\ntx add(msg)"]
+        P3_send -> S3B
+        S3 -> P3_queue [label="M_send(msg)"]
+        P3_queue [shape="box" label="queue"]
+        P3_queue -> S3
+
+        {rank=same; S4 P4_release S4B P4_process P4_send P4_queue}
+        S4 [label="4: released\nunwant nameplate\nwant mailbox\nopen\n"]
+        S4B [label="4: released\nunwant nameplate\nwant mailbox\nopen\n(bound)"]
+        S3 -> S4 [label="(none)" style="invis"]
+        S3B -> P_release [label="rx_message()"]
+        P_release [shape="box" label="tx release()"]
+        P_release -> P3_process
+        P3_process [shape="box" label="process message"]
+        P3_process -> S4B
+        S4 -> P4_release [label="connect()"]
+        /* it is currently an error to release a nameplate you aren't
+        currently claiming, so release() is not idempotent. #118 fixes that */
+        P4_release [shape="box" label="tx claim() *#118\ntx release()\ntx open()\ntx add(queued)"]
+        S4B -> S4B [label="rx_claimed() *#118"]
+        S4B -> P_close [label="M_close()"]
+        S4B -> P4_send [label="M_send(msg)"]
+        P4_send [shape="box" label="queue\ntx add(msg)"]
+        P4_send -> S4B
+        S4 -> P4_queue [label="M_send(msg)"]
+        P4_queue [shape="box" label="queue"]
+        P4_queue -> S4
+
+        P4_release -> S4B
+        S4B -> S4 [label="lose()"]
+        S4B -> P4_process [label="rx_message()"]
+        P4_process [shape="box" label="process message"]
+        P4_process -> S4B
+
+        {rank=same; S5 S5B P5_open P5_process}
+        S5 [label="5: released\nunwant nameplate\nwant mailbox\nopen\n"]
+        S5B [label="5: released\nunwant nameplate\nwant mailbox\nopen\n(bound)"]
+        S4 -> S5 [label="(none)" style="invis"]
+        S4B -> S5B [label="rx_released()"]
+        S5 -> P5_open [label="connect()"]
+        P5_open [shape="box" label="tx open()\ntx add(queued)"]
+        P5_open -> S5B
+        S5B -> S5 [label="lose()"]
+        S5B -> P5_process [label="rx_message()"]
+        P5_process [shape="box" label="process message"]
+        P5_process -> S5B
+        S5B -> P5_send [label="M_send(msg)"]
+        P5_send [shape="box" label="queue\ntx add(msg)"]
+        P5_send -> S5B
+        S5 -> P5_queue [label="M_send(msg)"]
+        P5_queue [shape="box" label="queue"]
+        P5_queue -> S5
+
+        {rank=same; S6 P6_close S6B}
+        S6 [label="6: closing\nunwant mailbox\nopen\n"]
+        S6B [label="6: closing\nunwant mailbox\nopen\n(bound)"]
+        S5 -> S6 [label="M_close()"]
+        S5B -> P_close [label="M_close()"]
+        P_close [shape="box" label="tx close()"]
+        P_close -> S6B
+        S6 -> P6_close [label="connect()"]
+        P6_close [shape="box" label="tx close()"]
+        P6_close -> S6B
+        S6B -> S6 [label="lose()"]
+        S6B -> S6B [label="rx_released()"]
+        S6B -> S6B [label="M_close()"]
+        S6B -> S6B [label="M_send()"]
+        S6 -> S6 [label="M_send()"]
+
+        {rank=same; S7 S7B}
+        S7 [label="7: closed\n"]
+        S7B [label="7: closed\n(bound)"]
+        S6 -> S7 [label="(none)" style="invis"]
+        S6B -> P7_drop [label="rx_closed()"]
+        P7_drop [shape="box" label="C_drop()"]
+        P7_drop -> S7B
+        S7 -> S7B [label="connect()" style="invis"]
+        S7B -> S7 [label="lose()"]
+        S7B -> S7B [label="M_close()"]
+        S7B -> S7B [label="M_send()"]
+
+}