quest: plan follow-ups from the current PR wave - #4304
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Go and moq-tokio test flakes, the lag dashboard and final lag sample, GPU CI on a self-hosted runner, MoqError messages in Python/Go/Dart, a cache age-out benchmark, JS IETF datagrams, raw QUIC stream codes, the live marker in apps, and capture times in the bindings. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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| Public API: additive optional capture time on moq-ffi's data producers and | ||
| every wrapper; `window::Producer::push` accepts `Timed`, source-compatible. |
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Adding an optional age parameter to the existing generated update and append methods is not additive: callers in languages such as Go must supply every parameter even when its type is nullable, so every existing update(payload) or append(payload) call stops compiling. Since moq-ffi 0.4.7 and several wrappers are published, this quest must explicitly target dev rather than merging as a normal direct m1 child.
AGENTS.md reference: quest/AGENTS.md:L18-L23
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Agreed. The Public API note now says this lands on dev. A new parameter on the generated update/append breaks published binding callers, and a _with_x twin is ruled out.
(Written by Opus 5.5)
| - An `Instant` cannot cross the FFI. Pick a form every language can produce | ||
| without a shared epoch. Recommendation: an optional age (how long ago the | ||
| payload was captured), turned into `Instant::now() - age` inside moq-ffi. A |
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When an FFI caller supplies an age greater than the process's representable monotonic history, Instant::now() - age panics instead of returning a typed input error. This value comes from untrusted language bindings, and a large duration such as Duration::MAX reproduces the panic, so the plan should require checked_sub, map failure to InvalidCapture or another validation error, and cover it with a test.
AGENTS.md reference: AGENTS.md:L17-L18
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This is obsolete now. The maintainer settled on a media timestamp taken from the broadcast clock's now() exposed by moq-ffi, so there is no duration and no Instant::now() - age to underflow. A timestamp ahead of now is refused.
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| - `just rs nvidia`: symlink only those three libraries (by soname) from | ||
| `/usr/lib/x86_64-linux-gnu` into a private directory, put that on | ||
| `LD_LIBRARY_PATH`, and run `cargo nextest run -E 'test(/nvdec|nvenc|cuda/)'`. | ||
| Fail when a library is missing instead of skipping. `just rs vulkan-cuda` |
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The proposed filter does not run every GPU-dependent test. The installed cargo-nextest nextest help filtersets defines test(name-matcher) as selecting test names, and rs/moq-nvenc/src/safe/session.rs contains the real-hardware test safe::session::tests::failed_submission_releases_the_session, whose name contains none of nvdec, nvenc, or cuda. That regression can therefore continue silently skipping in hosted CI and remain absent from the new nightly; select the relevant packages or explicitly include all hardware-only tests.
AGENTS.md reference: AGENTS.md:L23-L23
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Right, failed_submission_releases_the_session needs hardware and matches none of those names. The plan now selects GPU tests by their driver probes, not by name. It recommends the existing #[ignore = "requires ..."] convention plus nvidia test modules, so one filter (--run-ignored only -E 'test(/::nvidia::/)') picks them all up without the other ignored hardware tests. It also folds vulkan-cuda into the recipe.
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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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WalkthroughThe PR adds quest index entries and documents plans for test reliability, GPU CI, app state, language bindings, transport interoperability, cache eviction, and QoS metrics. These changes describe proposed work; they do not implement the described behavior. Priority: ⬇️ Low Merge Risk: 🔵 Low · up to The plans are mergeable with follow-up: make the Go reproduction reliable and verify the Vulkan runtime setup before implementing the NVIDIA test recipe. Architecture SummaryArchitecture risk: 🔵 Low · up to The change affects 1 system. Changed systems: Architecture concerns Review detailsSystems and components
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🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches 💡 1✨ Simplify code
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Inline comments:
In @quest/m1/announce-live-apps.md:
- Around line 20-21: In the `expect()` flow, add a timeout or terminal error
transition for a connected session that never reaches `live`, so it cannot
remain pending until disposal. Add a test covering a successful connection that
stays open without sending `live`.
In @quest/m1/data-capture-bindings.md:
- Around line 19-20: Clarify the capture-time API proposal in the plan: define
`age` as a signed offset that can represent future captures, and specify that
future-capture values are rejected so the required test can exercise that case.
Alternatively, change the test requirement if the API is intentionally limited
to non-negative durations.
In @quest/m1/go-origin-gc.md:
- Around line 19-20: Revise the reproduction guidance near `runtime.GC()` and
`GOGC=1` so these are described as stress conditions, not deterministic
reproducers; alternatively, require a test-visible finalizer signal before
asserting failure.
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quest/m1/README.mdquest/m1/announce-live-apps.mdquest/m1/cache-wall-eviction.mdquest/m1/data-capture-bindings.mdquest/m1/error-display.mdquest/m1/go-origin-gc.mdquest/m1/gpu-ci.mdquest/m1/js-ietf-datagram.mdquest/m1/qos/README.mdquest/m1/qos/final-lag-sample.mdquest/m1/raw-stream-codes.mdquest/m1/stats-lag-dashboard.mdquest/m1/worker-socket-count.md
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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Inline comments:
In @quest/m1/gpu-ci.md:
- Around line 29-34: Update the `just rs nvidia` recipe to make the Vulkan
loader, NVIDIA ICD, and required driver libraries available alongside the codec
libraries; if the recipe cannot provide them, keep `just rs vulkan-cuda` tests
separate rather than combining them.
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quest/m1/README.mdquest/m1/announce-live-apps.mdquest/m1/cache-wall-eviction.mdquest/m1/data-capture-bindings.mdquest/m1/error-display.mdquest/m1/go-origin-gc.mdquest/m1/gpu-ci.mdquest/m1/qos/README.mdquest/m1/qos/lag-dashboard.md
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| producer takes a capture time too. Settled scope: moq-ffi and its wrappers, | ||
| not libmoq. |
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The plan explicitly excludes libmoq, but rs/libmoq/src/api.rs exposes the equivalent JSON and binary update/append APIs, so C callers would be the only binding unable to supply capture times and doc/lib/c would remain stale. Include the C ABI, documentation, and tests in this quest or a required companion.
AGENTS.md reference: AGENTS.md:L92-L96
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Disagree. The maintainer settled the scope as moq-ffi and its wrappers, not libmoq. The generated C bindings questline (quest/m1/c/README.md) deletes the hand-written libmoq ABI in favor of C generated from moq-ffi, so C picks this up with no libmoq work. Added that link under Related in e16fc6c.
(Written by Claude Opus 5.5)
| `MoqError: <variant>`. Render the exported `Display` for errors, tag, and | ||
| bump every pin site the `flake.nix` comment lists. | ||
| - Dart: the `kixelated/uniffi-dart` fork. The regenerated bindings already | ||
| carry the unused extern; wire it to `toString()`, tag, bump `flake.nix`, | ||
| and regenerate `dart/moq_ffi`. |
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The Go and Dart work requires fixing and tagging two external generators before this repository can bump their pins and regenerate bindings, but the plan folds those releases into the dependent binding quest. Give each unblocking release/pin operation its own quest and make the applicable wrapper work require it, so this quest is not blocked midway on external releases.
AGENTS.md reference: quest/AGENTS.md:L85-L86
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Disagree. That rule covers a release that unblocks other quests. Here nothing else waits on the generator tags: the fork fix, the tag, the pin bump, and the regenerated bindings are all one change in forks this org owns. bbr-ack-cleanup.md follows the same pattern (fix the fork, release, pin here).
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| - Release the fixed crates and bump the pins here in the same quest; published | ||
| crates depend on crates.io releases, never a patch. A moq-tokio test over | ||
| `moqt://` asserts a reset code arrives verbatim, beside `close_code.rs`. |
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This explicitly keeps the upstream crate releases and the local pin bump in one quest, even though the releases must exist before the moq-tokio regression can build against them. Create a prerequisite release/pin quest and require it from the local test quest rather than making one quest span the upstream release boundary.
AGENTS.md reference: quest/AGENTS.md:L85-L86
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Disagree, for the same reason as the generator thread. The adapter crates are moq-dev forks, no other quest waits on their release, and the fix, release, and pin bump are a single piece of work (the same pattern as bbr-ack-cleanup.md). Splitting it would only add a quest nobody else requires.
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| - Mixed versions: two moq peers on raw QUIC agree today because both map. A | ||
| fixed peer and an older one will not. Check which codes moq-net reads back | ||
| (group stream resets, subscribe STOP_SENDING) and decide whether the | ||
| transition needs more than a release note before merging. |
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The plan acknowledges that a fixed peer and an older peer no longer interoperate on raw QUIC, which makes this a published wire behavior break rather than an ordinary main-targeting fix. Explicitly target dev, or settle a backwards-compatible transition before implementation, instead of leaving compatibility as a release-note decision.
AGENTS.md reference: quest/AGENTS.md:L22-L23
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Partly agree, and settled in e16fc6c. The plan now requires compatibility with published versions. A fixed peer reads both forms, because mapped codes sit in the HTTP/3 WebTransport range. If moq-net acts on any of these codes beyond reporting them, an older peer misreading them makes this a wire break, and the quest retargets to dev. That depends on a code audit, so it stays conditional instead of retargeting now.
(Written by Claude Opus 5.5)
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Raw stream codes must stay wire compatible or retarget to dev, the Vulkan tests need the host NVIDIA ICD, and data capture links the generated C bindings that replace libmoq. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Landing summary: the failed (Written by Claude Opus 5.5) |
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| - Mixed versions: two moq peers on raw QUIC agree today because both map, and | ||
| wire changes must stay compatible with published versions. A fixed peer can | ||
| read both forms, since a mapped code lands in the HTTP/3 WebTransport range | ||
| that no application code reaches. An older peer misreads a fixed peer's raw |
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When a fixed raw-QUIC peer receives a reset or stop from an older adapter, that peer still sends error_to_http3(code); merely skipping the mapping as instructed above surfaces the large HTTP/3 value rather than the original application code. The disjoint ranges make the legacy encoding detectable but do not decode it, so the new claim that fixed peers read both forms is false and old-sender/new-receiver reporting remains broken. Add conditional legacy unmapping on raw receive plus a mixed-version regression, or treat this direction as a wire break. This mixed-version claim is the fresh evidence beyond the earlier compatibility finding.
AGENTS.md reference: AGENTS.md:L75-L77
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# Conflicts: # quest/m1/README.md
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Problem
The current PR wave (#4292, #4298, #4270, #4274, #4261, #4262, #4132) left follow-ups in PR bodies and threads, plus two load-only test flakes. None had a quest.
Approach
Eleven quests, each ranked in m1 (none duplicated an existing quest):
[XS](go-origin-gc.md): likely cause from reading, not yet reproduced. The test drops its last reference tooriginearly. The generated finalizer can then free the onlyMoqOriginProducer. That closes the origin, and the next call returnsClosed.[XS](worker-socket-count.md):udp_sockets_onmatches only the port suffix, so it counts other processes' sockets. The quest matches the full address, or this process's inodes.[XS], a child of the QoS line (qos/final-lag-sample.md): theFrontierInnerdrop takes one last sample.[S], a child of the QoS line (qos/lag-dashboard.md): requiresqos/starvation.md(feat(stats): per-broadcast viewer lag and dropped media on egress rows #4298).[S](gpu-ci.md): addsjust rs nvidiawith a symlinked driver-lib dir. It selects every GPU test through ignorednvidiatest modules, not by name. It adds a gated nightly job on the maintainer's host. It shares one runner registration with feat(relay): drain sessions gracefully over GOAWAY #4132'suring-runner.md. It has a plain-text Required for the runner.[M](error-display.md): the Go and Dart forks are fixed in-org, and Python gets a hand-written__str__inpy/moq-rs.[S](cache-wall-eviction.md): a benchmark over tracks and groups formax_ageage-out onmax(wall, pts)with timers vs. write-driven, including the stall trade-off.[M](js-ietf-datagram.md): requires the Rust datagram quest (feat(moq-net): carry datagrams over moq-transport as OBJECT_DATAGRAM #4274).[M](raw-stream-codes.md): fixes the adapters in noq and web-transport and bumps the pins. Requires Close codes (feat!: keep the peer's close code over qmux and raw QUIC, on web-transport-trait 0.5 #4262), and flags the mixed-version risk.[M](announce-live-apps.md): lands ondevwith feat(js/net)!: announce streams yield a live marker once caught up #4261.[M](data-capture-bindings.md): also covers the JSONwindowproducer. Lands ondev, because a new parameter on generated methods breaks binding callers. Requires Data jitter (feat(mux): detect delay and jitter on JSON and binary tracks #4270).Settled decisions, from the maintainer:
qos/starvation.md, not the whole line.liveuntil its first session lands or its first dial gives up.MoqErrorthrough a hand-written__str__inpy/moq-rs. There is no upstream uniffi-rs PR.now(), callers stamp payloads with it, and moq refuses one ahead of now. The scope is moq-ffi and its wrappers, not libmoq.max_ageretention aging groups out on a timer. The pool's idle expiry is out of scope.Impact
Alternatives
devin feat!: keep the peer's close code over qmux and raw QUIC, on web-transport-trait 0.5 #4262, and this is a separate adapter change.Follow-ups
None beyond the quests above.
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