test: update readme and the mdx test

README.md

@@ -173,49 +173,9 @@ val expected_sum : int = 5050
 We have a `Exn_bt.t` type that comes in handy in many places. It bundles together
 an exception and the backtrace associated with the place the exception was caught.
 
-### Fibers
+### Local storage
 
-On OCaml 5, Moonpool comes with a library `moonpool.fib` (module `Moonpool_fib`)
-which provides _lightweight fibers_
-that can run on any Moonpool runner.
-These fibers are a sort of lightweight thread, dispatched on the runner's
-background thread(s).
-Fibers rely on effects to implement `Fiber.await`, suspending themselves until the `await`-ed fiber
-is done.
-
-```ocaml
-# #require "moonpool.fib";;
-...
-
-# (* convenient alias *)
-  module F = Moonpool_fib;;
-module F = Moonpool_fib
-# F.main (fun _runner ->
-    let f1 = F.spawn (fun () -> fib 10) in
-    let f2 = F.spawn (fun () -> fib 15) in
-    F.await f1 + F.await f2);;
-- : int = 1076
-```
-
-Fibers form a _tree_, where a fiber calling `Fiber.spawn` to start a sub-fiber is
-the sub-fiber's _parent_.
-When a parent fails, all its children are cancelled (forced to fail).
-This is a simple form of [Structured Concurrency](https://en.wikipedia.org/wiki/Structured_concurrency).
-
-Like a future, a fiber eventually _resolves_ into a value (or an `Exn_bt.t`) that it's possible
-to `await`. With `Fiber.res : 'a Fiber.t -> 'a Fut.t` it's possible to access that result
-as a regular future, too.
-However, this resolution is only done after all the children of the fiber have
-resolved — the lifetime of fibers forms a well-nested tree in that sense.
-
-When a fiber is suspended because it `await`s another fiber (or future), the scheduler's
-thread on which it was running becomes available again and can go on process another task.
-When the fiber resumes, it will automatically be re-scheduled on the same runner it started on.
-This means fibers on pool P1 can await fibers from pool P2 and still be resumed on P1.
-
-In addition to all that, fibers provide _fiber local storage_ (like thread-local storage, but per fiber).
-This storage is inherited in `spawn` (as a shallow copy only — it's advisable to only
-put persistent data in storage to avoid confusing aliasing).
+Moonpool, via picos, provides _task local storage_ (like thread-local storage, but per task).
 The storage is convenient for carrying around context for cross-cutting concerns such
 as logging or tracing (e.g. a log tag for the current user or request ID, or a tracing
 scope).

dune

@@ -3,7 +3,7 @@
   (flags :standard -strict-sequence -warn-error -a+8 -w +a-4-40-42-70)))
 
 (mdx
- (libraries moonpool moonpool.forkjoin moonpool.fib threads)
+ (libraries moonpool moonpool.forkjoin threads)
  (package moonpool)
  (enabled_if
   (>= %{ocaml_version} 5.0)))

examples/discuss1.ml

@@ -1,11 +1,12 @@
-(** Example from
-    https://discuss.ocaml.org/t/confused-about-moonpool-cancellation/15381 *)
+(** NOTE: this was an example from
+    https://discuss.ocaml.org/t/confused-about-moonpool-cancellation/15381 but
+    there is no cancelation anymore :) *)
 
 let ( let@ ) = ( @@ )
 
 let () =
   let@ () = Trace_tef.with_setup () in
-  let@ _ = Moonpool_fib.main in
+  let@ _ = Moonpool.main in
 
   (* let@ runner = Moonpool.Ws_pool.with_ () in *)
   let@ runner = Moonpool.Background_thread.with_ () in
@@ -13,15 +14,13 @@ let () =
   (* Pretend this is some long-running read loop *)
   for i = 1 to 10 do
     Printf.printf "MAIN LOOP %d\n%!" i;
-    Moonpool_fib.check_if_cancelled ();
-    let _ : _ Moonpool_fib.t =
-      Moonpool_fib.spawn ~on:runner ~protect:false (fun () ->
+    let _ : _ Moonpool.Fut.t =
+      Moonpool.Fut.spawn ~on:runner (fun () ->
           Printf.printf "RUN FIBER %d\n%!" i;
-          Moonpool_fib.check_if_cancelled ();
           Format.printf "FIBER %d NOT CANCELLED YET@." i;
           failwith "BOOM")
     in
-    Moonpool_fib.yield ();
+    Moonpool.Fut.yield ();
     (* Thread.delay 0.2; *)
     (* Thread.delay 0.0001; *)
     ()

examples/dune

@@ -5,7 +5,6 @@
  ;(package moonpool)
  (libraries
   moonpool
-  moonpool.fib
   trace
   trace-tef
   ;tracy-client.trace