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build: production targets x86-64-v4 (D-PROD-V4) - #1529
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Production always runs on v4 (Railway about 95%, Claude Code sessions about 70%), so everything shipped builds for x86-64-v4: Dockerfile, Dockerfile.hhtld, cognitive-stack, symbiont, both thinking-engine images, and the wheel (make publish). New .cargo/config-v4.toml mirrors ndarray's (without -Dwarnings) and applies to x86_64 only, so arm64 builds are untouched. On a host without AVX-512, ndarray's startup cpu_guard exits with the missing features instead of a mid-run SIGILL. Measured: --config .cargo/config-v4.toml joins with config.toml's native (-Ctarget-cpu=native -Ctarget-cpu=x86-64-v4); the later flag wins, the cfg equals v4 alone (23 features vs native's 32 on this host). The Dockerfiles copy the file over config.toml and never join. Comments in config.toml, config-v3.toml (no longer the shipping target) and Dockerfile.md updated to match. Board entry D-PROD-V4 records the decision and what stays open (CI tests the v3 arm only; probes don't refuse off-v4 timings; Dockerfile.avx512 now duplicates Dockerfile). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011BMJnDBAfzcuQh5HeT39Rh
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The title clearly and concisely describes the main change: production builds now target x86-64-v4. The D-PROD-V4 identifier adds useful context. |
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A rabbit checks the build flags bright,
Then hops through v-four code at night.
Two CPU targets pass the gate,
The wheel rolls on, the tests compile straight.
Board notes settle; carrots celebrate.
Comment @coderabbitai help to get the list of available commands.
Dockerfile is the same-tier fallback for a deploy that does not name Dockerfile.avx512. Board entry records the open native-vs-v4 choice for that fallback. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011BMJnDBAfzcuQh5HeT39Rh
linux-build-v4 builds lance-graph's tests and benches for x86-64-v4 on a GitHub runner (mostly v3) and runs nothing. --target keeps RUSTFLAGS off build scripts and proc-macros, which do run on the host. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011BMJnDBAfzcuQh5HeT39Rh
With --target, RUSTFLAGS no longer reaches build scripts and proc-macros,
which then took the profile default (measured: -C debuginfo=2 on a build
script). CARGO_PROFILE_{DEV,TEST}_DEBUG=0 pins them to 0; runner disk
makes that mandatory.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011BMJnDBAfzcuQh5HeT39Rh
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011BMJnDBAfzcuQh5HeT39Rh
…rod-v4 # Conflicts: # .claude/board/entries/README.md
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011BMJnDBAfzcuQh5HeT39Rh
Railway hosts are Sapphire Rapids, Emerald Rapids or newer. The canonical deploy file now compiles VNNI, BF16 and FP16 in; plain Dockerfile stays at x86-64-v4 as the fallback. The build stage runs the tests, so a build on an older host fails there instead of in production. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011BMJnDBAfzcuQh5HeT39Rh
The canonical deploy file stays sapphirerapids; the fallback builds for the build host's CPU, guarded at startup by ndarray's cpu_guard. Board records that neither Dockerfile provides the ndarray sibling the build needs. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011BMJnDBAfzcuQh5HeT39Rh
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linux-build-v4 becomes a matrix over x86-64-v4 and sapphirerapids, each compiled and linked with --target and run nowhere. Companion: AdaWorldAPI/ndarray#361. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011BMJnDBAfzcuQh5HeT39Rh
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| # to x86_64 targets, so an arm64 build keeps its own aarch64 baseline (a | ||
| # global RUSTFLAGS would hand the aarch64 compiler an x86 CPU name). | ||
| RUN cp .cargo/config-v3.toml .cargo/config.toml | ||
| RUN cp .cargo/config-v4.toml .cargo/config.toml |
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On an x86_64 build machine without AVX-512, copying this config and then invoking Cargo without --target also compiles host build scripts and proc-macros for x86-64-v4; Cargo executes those helpers during the image build, so they can SIGILL before the target binary is produced. The new workflow explicitly documents this behavior and uses --target to avoid it (.github/workflows/build.yml lines 91–95), but this Dockerfile and the equivalent crates/cognitive-stack/Dockerfile and crates/symbiont/Dockerfile builds omit that separation. Add an explicit target or otherwise apply v4 flags only to target artifacts.
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Agreed, and reproduced: with config-v4.toml in place and no --target, a build script compiles with target-cpu=x86-64-v4; with --target <host triple> it gets none and only the crate gets v4. Fixed in 0badfaf (not yet pushed): Dockerfile.hhtld, crates/cognitive-stack/Dockerfile and crates/symbiont/Dockerfile now build with --target "$(rustc -vV | sed -n 's/^host: //p')" and copy the binaries back to the paths their runtime stages read. The host triple keeps arm64 builds working, since the config only applies to x86_64. Dockerfile and Dockerfile.avx512 are left as they are on purpose: they run the test suite on the build host, so that host must support their tier in any case.
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Dockerfile.hhtld, crates/cognitive-stack/Dockerfile and crates/symbiont/Dockerfile build with --target <host triple>, so the cfg-keyed v4 flags reach only the binary, not build scripts and proc-macros, which run on the build host. Outputs are copied back to the paths the runtime stages read. (codex P1) Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011BMJnDBAfzcuQh5HeT39Rh
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Inline comments:
Review comments at @python/Makefile:
- Around line 28-31: Update PORTABLE_RUSTFLAGS and its use in the maturin build
so x86-64-v4 flags apply only to the wheel target, not host-side Cargo artifacts
such as proc-macro binaries; keep host artifacts on their baseline CPU settings.
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📒 Files selected for processing (18)
.cargo/config-v3.toml.cargo/config-v4.toml.cargo/config.toml.claude/board/LATEST_STATE.md.claude/board/PR_ARC_INVENTORY.md.claude/board/STATUS_BOARD.md.claude/board/entries/2026-10-13-production-targets-v4.md.claude/board/entries/README.md.github/workflows/build.ymlDockerfileDockerfile.avx512Dockerfile.hhtldDockerfile.mdcrates/cognitive-stack/Dockerfilecrates/symbiont/Dockerfilecrates/thinking-engine/Dockerfilecrates/thinking-engine/Dockerfile.railwaypython/Makefile
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Both clone the ndarray and OGAR siblings at their default branches to /ndarray and /OGAR and copy tools/ (the workspace member outside crates/). Dockerfile.hhtld's fallback fetched ndarray's nonexistent main branch; it now fetches master. Checked in a Docker-shaped layout: all members and path dependencies resolve. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011BMJnDBAfzcuQh5HeT39Rh
…acros) make publish passes --target <host triple> to maturin on x86_64, so the x86-64-v4 RUSTFLAGS reach only the wheel's code, not build scripts and proc-macros that run on the publishing host. (coderabbit) Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011BMJnDBAfzcuQh5HeT39Rh
… rust 1.99, build the copied example codex P2 on #1530: both images set the v4 flags but invoked cargo without --target, so build scripts and proc-macros were compiled for v4 and run on the build host. Building the new line in a Docker-shaped layout also showed three earlier breaks: no ndarray sibling, a 1.98.1 base image against the 1.99 toolchain, and no playground example built for the COPY. The Railway image's '2>/dev/null || true' hid all of them. PR_ARC entry for #1529 records the gap and the fix. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_011BMJnDBAfzcuQh5HeT39Rh
board: #1529 merged (D-PROD-V4)
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Why
Production always runs on x86-64-v4. Measured exposure: Railway hosts are about 95% v4, Claude Code sessions about 70%. Every shipped artifact here built at v3, so production ran the AVX2 arm. This PR also records #1525's board entries. Timings measured on that arm say nothing about production.
Change
Dockerfile.avx512(canonical deploy)x86-64-v4sapphirerapids(Railway hosts are Sapphire Rapids, Emerald Rapids or newer)Dockerfile(fallback)RUSTFLAGS -C target-cpu=x86-64-v3native: the build host's CPU, guarded at startup bycpu_guardDockerfile.hhtld,crates/cognitive-stack/Dockerfile,crates/symbiont/Dockerfilecp config-v3.toml config.tomlcp config-v4.toml config.toml(x86_64 only; arm64 untouched)crates/thinking-engine/Dockerfile,Dockerfile.railwayCARGO_TARGET_X86_64_…_RUSTFLAGS x86-64-v3x86-64-v4python/Makefile(make publish)x86-64-v3on x86_64 hostsx86-64-v4.cargo/config-v4.toml-Ctarget-cpu=x86-64-v4, mirrors ndarray's file without-Dwarningsbuild.ymllinux-build-v4matrix (x86-64-v4,sapphirerapids): compiles and links lance-graph's tests and benches with--targetand debug 0 for every artifact, runs nothing. ndarray gets the same pair in AdaWorldAPI/ndarray#361Comments in
.cargo/config.toml,.cargo/config-v3.toml(no longer the shipping target) andDockerfile.mdnow match.Dockerfile.mdalso claimed the local default was v4; it isnative, and that is fixed.Measured
--configfile joins withnative; it does not replace it.cargo --config .cargo/config-v4.tomlpasses rustc-Ctarget-cpu=native -Ctarget-cpu=x86-64-v4. The later flag wins: the cfg equals v4 alone, 23 target features against native's 32 on this Cascade Lake host. The v3 file behaves the same way.config.toml, so no join happens there.cargo check -p lance-graph-contractpasses under the new config.--targetkeeps RUSTFLAGS off build scripts. Without it, a build script compiles withtarget-cpu=x86-64-v4and would run on a v3 runner. With--target x86_64-unknown-linux-gnu, the build script compiles with no target-cpu and the crate with v4 (scratch crate,cargo build -v).Safety
On a host without AVX-512, ndarray's startup
cpu_guardnames the missing features and exits beforemain. This holds only for binaries that link ndarray.Not done (open, recorded in the board entry)
Dockerfile.avx512's build stage. The test jobs still run on a v3 pin rather than per-runnernative.docker buildwas run.DockerfileandDockerfile.avx512previously could not resolve the workspace (no ndarray/OGAR siblings,tools/not copied); they now clone ndarray and OGAR at their default branches and copytools/. In a Docker-shaped layout every member and path dependency resolves; the registry download was not run.--target <host triple>so v4 flags stay off build scripts (codex P1).Board
Entry
2026-10-13-production-targets-v4.md(D-PROD-V4); entries index regenerated;--checkandappend_only_gatepass.🤖 Generated with Claude Code
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