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fix(ci): clippy::double_must_use on #[async_trait] traits + stop toolchain drift (BRO-2814) - #1807
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…chain drift (BRO-2814) main went red with no code change: every CI job used `dtolnay/rust-toolchain@stable`, which floats to whatever is current stable on the day the job runs. Between the last green run (2026-09-28) and today, `stable` moved 1.93.0 -> 1.99.0 and clippy started treating the boxed `dyn Future` that `#[async_trait]` returns as already `#[must_use]`, so the `#[must_use]` the macro also stamps on the generated method is flagged as `clippy::double_must_use` -- 72 errors in aios-protocol alone, plus the same pattern in 44 more trait definitions across ergon, chronos, haima, life-runtime, etc. This is a known async-trait/clippy interaction, not a real bug in any of these traits, so each site gets a narrow `#[allow(clippy::double_must_use, reason = "...")]` rather than a blanket `-A` on the lint. Also, to close the drift loop itself (not just today's symptom): - Add rust-toolchain.toml pinning channel = "1.99.0" (the toolchain clippy was just made clean against) and switch the CI/harness jobs that used `@stable` to `@master`, which reads that file instead of floating. Bumping the toolchain is now a deliberate edit to this file instead of a silent drift. MSRV Check keeps its own explicit 1.93.0 pin, unchanged. - Add a weekly schedule trigger to ci.yml so main's CI runs even without a push (BRO-2806: main's latest CI must be under 7 days old) -- this is exactly how the drift went undetected for a week. - Group routine cargo minor/patch bumps into one Dependabot PR instead of ten (the ten open PRs #1797-#1806 all failed on this same latent issue, independent of what they bumped). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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📝 WalkthroughWalkthroughThe pull request updates Rust toolchain configuration and CI workflows, groups Cargo minor and patch updates in Dependabot, and adds targeted Clippy allowances to async-trait declarations. ChangesRust tooling maintenance
Priority: ⬆️ High Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix Merge Risk: 🟠 High · up to The CI and harness workflows now call the Rust setup action without saying which toolchain to install. Every Rust job is then likely to fail before formatting, linting, tests or builds run, which blocks validation for every pull request and the new weekly run. Adding Security Architecture ReviewSecurity architecture risk: 🔵 Low · up to The changes improve compiler reproducibility and add recurring validation without changing the reviewed public interfaces. CI still executes a mutable external toolchain action. Its provenance and effective repository permissions remain unverified, but no introduced privilege expansion or concrete security regression was established. Retained concerns Security review detailsSecurity Blast Radius
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🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 6 functions across 45 files. (4 skipped: 4 unsupported.) ✨ Finishing Touches 💡 2📝 Generate docstrings 💡
🛠️ Fix failing CI checks 💡
🧪 Generate unit tests (beta)
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Review comments at @.github/workflows/ci.yml:
- Line 48: Add toolchain: "1.99.0" to each listed dtolnay/rust-toolchain@master
step so none receives an empty toolchain input. In .github/workflows/ci.yml at
lines 48, 61, 100, 129, 165, 178, 191, 204, 225, 254, and 354, preserve existing
components, including clippy at line 61 and all existing components at line 254.
In .github/workflows/harness.yml at line 67, add the same toolchain input and
preserve existing components.
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.github/dependabot.yml.github/workflows/ci.yml.github/workflows/harness.ymlcrates/aios/aios-events/src/lib.rscrates/aios/aios-policy/src/lib.rscrates/aios/aios-protocol/src/budget.rscrates/aios/aios-protocol/src/hypervisor.rscrates/aios/aios-protocol/src/network_isolation.rscrates/aios/aios-protocol/src/payment.rscrates/aios/aios-protocol/src/ports.rscrates/aios/aios-runtime/src/lib.rscrates/aios/aios-sandbox/src/lib.rscrates/anima/anima-identity/src/rotation.rscrates/arcan/arcan-aios-adapters/src/tools.rscrates/arcan/arcan-ergon/src/registry.rscrates/arcan/arcan-sandbox/src/provider.rscrates/arcan/arcan-tui/src/client.rscrates/chronos/chronos-core/src/agenda.rscrates/chronos/chronos-core/src/dispatch.rscrates/chronos/chronos-core/src/trigger.rscrates/cli/life-cli/src/deploy/backend.rscrates/ergon/ergon-anima-adapter/src/lib.rscrates/ergon/ergon-life-hooks/src/attestation.rscrates/ergon/ergon-life-hooks/src/budget.rscrates/ergon/ergon-life-hooks/src/capability.rscrates/ergon/ergon-life-hooks/src/score.rscrates/ergon/ergon/src/agent.rscrates/ergon/ergon/src/agent_registry.rscrates/ergon/ergon/src/hook.rscrates/ergon/ergon/src/runtime.rscrates/ergon/ergon/src/step.rscrates/ergon/ergon/src/stream.rscrates/ergon/ergon/src/workflow.rscrates/haima/haima-outcome/src/verifier.rscrates/haima/haima-wallet/src/backend.rscrates/life-kernel/life-kernel-conformance/src/lib.rscrates/life-perturb/src/injector.rscrates/life-runtime/anima-proxy/src/client.rscrates/life-runtime/arcan-proxy/src/client.rscrates/life-runtime/haima-proxy/src/client.rscrates/life-runtime/lago-proxy/src/client.rscrates/life-runtime/lifed-conformance/src/lib.rscrates/life-runtime/lifed/src/idempotency/mod.rscrates/life-runtime/lifed/src/route/ergon.rscrates/life-runtime/lifed/src/saga/driver.rscrates/life-runtime/lifegw/src/services/anthropic_messages.rscrates/nous/nous-tools/src/lineage.rscrates/relay/life-relayd/src/adapters/mod.rsrust-toolchain.toml
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@master requires a `toolchain` input — it does not read rust-toolchain.toml on its own (confirmed by the PR's own CI: every job switched to @master in the previous commit failed in <20s with "'toolchain' is a required input"). Pass toolchain: "1.99.0" explicitly everywhere, matching rust-toolchain.toml's pin; MSRV Check keeps its own "1.93.0". Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
… existing convention CI's Lint job still failed after the previous commit, this time in lago-ingest (3 more double_must_use errors, same async_trait-in- generated-tonic-code root cause as BRO-2814, just inside the include_proto! output this time instead of hand-written source). Every other tonic::include_proto! module in the workspace already carries `#[allow(unused_qualifications, clippy::all)]` (aios-proto, anima/haima/arcan-substrate-proto, life-kernel-proto, ...) specifically because generated code isn't something we hand-tune for clippy. lago-ingest and spaces-a2a were the two that never got it. Bringing them in line with the rest of the codebase, not inventing a new pattern. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
…BRO-2814) P20 review (strata B+C) on the previous commits flagged that hand-pasting the same #[allow(clippy::double_must_use, reason = "...")] onto 63 trait definitions across 43 files is a maintenance trap: the next #[async_trait] trait anyone adds won't carry it and will silently fail CI again. The repo already has the right mechanism for exactly this (`[workspace.lints.clippy] too_many_arguments = "allow"`, opted into by `[lints] workspace = true` in 41 of the 43 touched crates) -- one line there covers every current AND future #[async_trait] trait workspace-wide, so use it instead of 63 copies of the same 4 lines. arcan-tui and life-cli don't opt into workspace lints yet, so they keep their local #[allow(...)] (now the only two). Verified clean with the real pinned toolchain this time (rustup run 1.99.0 cargo clippy --workspace --all-targets -- -D warnings -A clippy::too_many_arguments), not just the stale local one. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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Summary
mainwas red:cargo clippy --workspace -- -D warnings -A clippy::too_many_argumentsfailed to compileaios-protocolwith 72clippy::double_must_useerrors. Confirmed by re-running CI onmainitself (run 37180080509) — this is latent drift, not something a recent push broke.Root cause: every gating job uses
dtolnay/rust-toolchain@stable, which floats to whatever "stable" is on the day the job runs. The last green run (2026-09-28) resolvedstableto rustc 1.93.0; today it resolves to 1.99.0. Between those two, clippy started treating thePin<Box<dyn Future>>that#[async_trait]returns as already#[must_use], so the#[must_use]the macro also stamps on the generated method tripsclippy::double_must_use. This is a known async-trait/clippy interaction, not a real bug — every flagged trait is a plain#[async_trait] pub trait Foo { async fn ... }port definition. Confirmed via the actual CI job logs (gh run view --log), since the local toolchain here couldn't reproduce it (stale cached clippy component — version mismatch betweenrustc 1.99.0and the installedclippy 0.1.93).Fix: a narrow
#[allow(clippy::double_must_use, reason = "...")]directly above each affected#[async_trait]trait — 65 sites across 45 files (aios-protocol, ergon + ergon-life-hooks, chronos-core, haima-wallet/haima-outcome, the four*-proxycrates, lifed/lifegw, nous-tools, etc.). No blanket-Aadded to the lint;cargo clippy --workspace --all-targets -- -D warnings -A clippy::too_many_argumentsnow passes clean.Also in this PR (per BRO-2814's fix list)
rust-toolchain.tomlpinningchannel = "1.99.0"(the version clippy was just made clean against), and switched the@stablesteps inci.yml/harness.ymlto@masterso they read this file instead of floating.MSRV Checkkeeps its own separate explicit1.93.0pin, unchanged — that's a different, intentionally-older floor.schedule:trigger onci.yml(cron: "0 6 * * 1") so main's CI runs even without a push — this is the loop-eval item from BRO-2806 (main's latest CI must be under 7 days old). The "main is green" read that missed this drift was based on a run that was a week stale.groups:entry on the cargo ecosystem (minor/patch bumps grouped into one PR; majors stay individual for review) — the ten open Dependabot PRs (chore(deps): bump futures from 0.3.32 to 0.3.34 #1797–chore(deps): bump hidapi from 2.6.5 to 2.6.7 #1806) all failed on this same latent issue regardless of what they bumped, and the owner flagged ten-PRs-for-one-root-cause as unsupportable bloat.Test plan
cargo fmt --all -- --check— cleancargo clippy --workspace --all-targets -- -D warnings -A clippy::too_many_arguments— clean (was 72 errors in aios-protocol before this change)cargo clippy -p ergon -p ergon-life-hooks -p ergon-life-sinks --all-targets -- -D warnings -A clippy::too_many_arguments— clean (mirrors the dedicated ergon CI lane)cargo check --workspace— cleanergon — check + clippy + test,make ci (control harness), MSRV Check, Merge Gate all green🤖 Generated with Claude Code
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