quest: plan catching the studio up to moq's main

quest/m0/README.md

@@ -114,6 +114,7 @@ repository.
 - [Playout writes land on positioned bus channels](/quest/m0/playout-positioned.md) - broadcast, media, and replay sound at the bus position its pictures are timed for
 - [moq-audio's positioned bus channel is pinned](/quest/m0/pin-bus-positioned.md) - `Bus::positioned`, which playout writes through
 - [moq-mux's decoupled playout clock is pinned](/quest/m0/pin-sync.md) - `moq_mux::sync` in place of `moq_mux::timeline`, which every later pin crosses
+- [The studio is caught up to moq's main](/quest/m0/pin-main.md) - moq's breaking changes past #8272 in one PR, so each later pin stays small
 
 ## Related
 

quest/m0/pin-aac-encode.md

@@ -23,4 +23,4 @@ fixing whatever the new API breaks here.
 
 ## Required
 
-- [moq-mux's decoupled playout clock is pinned](/quest/m0/pin-sync.md) - moq-dev/moq#8272, which no later pin can skip
+- [The studio is caught up to moq's main](/quest/m0/pin-main.md) - moq's breaking changes since moq-dev/moq#8272, so this pin takes only its own

quest/m0/pin-audio-filters.md

@@ -21,4 +21,4 @@ fixing whatever the new API breaks here.
 
 ## Required
 
-- [moq-mux's decoupled playout clock is pinned](/quest/m0/pin-sync.md) - moq-dev/moq#8272, which no later pin can skip
+- [The studio is caught up to moq's main](/quest/m0/pin-main.md) - moq's breaking changes since moq-dev/moq#8272, so this pin takes only its own

quest/m0/pin-audio-tap.md

@@ -20,4 +20,4 @@ fixing whatever the new API breaks here.
 
 ## Required
 
-- [moq-mux's decoupled playout clock is pinned](/quest/m0/pin-sync.md) - moq-dev/moq#8272, which no later pin can skip
+- [The studio is caught up to moq's main](/quest/m0/pin-main.md) - moq's breaking changes since moq-dev/moq#8272, so this pin takes only its own

quest/m0/pin-egress-dial.md

@@ -29,4 +29,4 @@ fixing whatever the new API breaks here.
 
 ## Required
 
-- [moq-mux's decoupled playout clock is pinned](/quest/m0/pin-sync.md) - moq-dev/moq#8272, which no later pin can skip
+- [The studio is caught up to moq's main](/quest/m0/pin-main.md) - moq's breaking changes since moq-dev/moq#8272, so this pin takes only its own

quest/m0/pin-main.md

@@ -0,0 +1,42 @@
+# [L] The studio is caught up to moq's main
+
+## Goal
+
+The `moq` submodule is at moq's `main` as of the day this quest starts, and
+`just ci` passes on it. Every breaking change between `644d48996` (where
+[pin-sync](/quest/m0/pin-sync.md) leaves it) and that commit is fixed in one
+PR, so each later wait-gated pin moves past only its own upstream change.
+
+## Plan
+
+Decided 2026-11-09 (maintainer, /quest-plan on the follow-up from
+[moq-dev/studio#123](https://github.com/moq-dev/studio/pull/123)):
+
+- ✅ Pin `main` on the day it starts, with `just upgrade-moq` and no commit
+  argument (rejected: a commit fixed at planning time; dropping the quest
+  and letting the first small pin absorb the catch-up). A commit chosen now
+  goes stale before anyone starts the quest.
+- ✅ Every pin whose upstream work lands after pin-sync requires this quest
+  (rejected: leaving them on pin-sync). Each then stays XS.
+
+On 2026-11-09, moq's `main` (`103052ed0`) was 117 first-parent commits past
+`644d48996`, 27 of them breaking. The ones that reach studio code most:
+
+- [moq-dev/moq#8220](https://github.com/moq-dev/moq/pull/8220): kio's
+  `Instant` has no `+` or `-` with a `Duration`. `rs/moq-scene/src/playout.rs`
+  and `source.rs` use them throughout.
+- [moq-dev/moq#8270](https://github.com/moq-dev/moq/pull/8270): moq-audio
+  codecs return zero or more outputs and flush.
+- [moq-dev/moq#8372](https://github.com/moq-dev/moq/pull/8372): moq-video
+  codecs split submission from receive.
+- Renames and surface cuts in moq-net, moq-tokio, moq-mux, and moq-video
+  (#8247, #8265, #8266, #8298, #8305, #8369, #8370, #8371, #8375, #8392).
+  `just ci` finds the rest.
+
+Each change's PR has an Impact section with the migration. If an upstream
+change a pin waits for is already on `main` when this starts, this PR also
+does that pin's work and deletes the pin quest.
+
+## Required
+
+- [moq-mux's decoupled playout clock is pinned](/quest/m0/pin-sync.md) - the playout rewrite onto `moq_mux::sync`, which this builds on

quest/m0/pin-portal-token.md

@@ -18,4 +18,4 @@ fixing whatever the new API breaks here.
 
 ## Required
 
-- [moq-mux's decoupled playout clock is pinned](/quest/m0/pin-sync.md) - moq-dev/moq#8272, which no later pin can skip
+- [The studio is caught up to moq's main](/quest/m0/pin-main.md) - moq's breaking changes since moq-dev/moq#8272, so this pin takes only its own

quest/m0/pin-sync.md

@@ -52,8 +52,8 @@ Not crossed here: [moq-dev/moq#8270](https://github.com/moq-dev/moq/pull/8270)
 (`147327e14`), and
 [moq-dev/moq#8220](https://github.com/moq-dev/moq/pull/8220) (`16a673036`,
 kio's `Instant` loses `+` and `-` with a `Duration`, which `playout.rs` and
-`source.rs` use throughout) all merged after #8272. The first pin past them
-fixes them.
+`source.rs` use throughout) all merged after #8272.
+[pin-main](/quest/m0/pin-main.md) fixes them.
 
 ## Waiting
 

quest/m2/compose/hang-layers.md

@@ -36,4 +36,4 @@ quests (rejected: "both quests", unnamed, which left out `@moq/watch`).
 
 - [moq-studio watch prototype](/quest/m2/compose/watch.md) - the format moq specifies
 - [Viewer controls](/quest/m2/compose/controls.md) - toggles and priorities the spec carries
-- [moq-mux's decoupled playout clock is pinned](/quest/m0/pin-sync.md) - moq-dev/moq#8272, which no later pin can skip
+- [The studio is caught up to moq's main](/quest/m0/pin-main.md) - moq's breaking changes since moq-dev/moq#8272, so this pin takes only its own

quest/m2/pin-browser-audio.md

@@ -23,4 +23,4 @@ Moved to m2 with the [web studio](/quest/m2/web.md) on 2026-11-09
 
 ## Required
 
-- [moq-mux's decoupled playout clock is pinned](/quest/m0/pin-sync.md) - moq-dev/moq#8272, which no later pin can skip
+- [The studio is caught up to moq's main](/quest/m0/pin-main.md) - moq's breaking changes since moq-dev/moq#8272, so this pin takes only its own

quest/m2/pin-browser-video.md

@@ -24,4 +24,4 @@ Moved to m2 with the [web studio](/quest/m2/web.md) on 2026-11-09
 
 ## Required
 
-- [moq-mux's decoupled playout clock is pinned](/quest/m0/pin-sync.md) - moq-dev/moq#8272, which no later pin can skip
+- [The studio is caught up to moq's main](/quest/m0/pin-main.md) - moq's breaking changes since moq-dev/moq#8272, so this pin takes only its own