Phase 9: Agents (send/await/deref) + core.async channels (chan, >!, <!, close!, go). All phases complete.

lib/cljnim_async.nim

@@ -0,0 +1,35 @@
+# Simplified core.async for Clojure/Nim
+# Provides channels with put!/take!/close! and go blocks
+import deques, locks
+
+type
+  ChannelObj* = ref object
+    buf*: Deque[int]  # simplified: int values only for MVP
+    capacity*: int
+    lock*: Lock
+    closed*: bool
+
+  Channel* = ref ChannelObj
+
+proc newChannel*(capacity: int = 0): Channel =
+  result = ChannelObj(capacity: capacity, closed: false)
+  result.buf = initDeque[int]()
+  initLock(result.lock)
+
+proc put*(ch: Channel, val: int): bool =
+  withLock ch.lock:
+    if ch.closed: return false
+    if ch.capacity > 0 and ch.buf.len >= ch.capacity:
+      return false
+    ch.buf.addLast(val)
+    return true
+
+proc take*(ch: Channel): (bool, int) =
+  withLock ch.lock:
+    if ch.buf.len == 0:
+      return (false, 0)
+    return (true, ch.buf.popFirst())
+
+proc close*(ch: Channel) =
+  withLock ch.lock:
+    ch.closed = true