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[PR #5324] fix(javascript-recovery): run Wakaru on macOS arm64 with shell resource limits #6880
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opened 2026-11-01 21:43:47 +00:00 by bsakaguchi
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📋 Pull Request Information
Original PR: https://github.com/morluto/rea/pull/5324
Author: @IOkal
Created: 10/20/2026
Status: 🔄 Open
Base:
main← Head:fix/wakaru-macos-arm64-limiter📝 Commits (1)
ea9286dfix(javascript-recovery): run Wakaru on macOS arm64 with shell resource limits📊 Changes
6 files changed (+257 additions, -27 deletions)
View changed files
📝
docs/javascript-recovery.md(+17 -4)📝
src/application/CapabilityInventory.ts(+1 -1)📝
src/javascript/recovery/WakaruCommand.test.ts(+161 -1)📝
src/javascript/recovery/WakaruCommand.ts(+59 -15)📝
src/javascript/recovery/WakaruPublication.ts(+2 -2)📝
src/javascript/recovery/WakaruRelease.ts(+17 -4)📄 Description
Summary
recover_javascript_sources/rea recover-javascript-sourcesrefuses to run on any host except Linux x64, even when the caller supplies a working Wakaru binary. Wakaru publishes a nativedarwin-arm64build (@wakaru/cli-darwin-arm64, pulled in bynpm install wakaru@1.14.0), but REA rejects it before launch.This lets macOS arm64 hosts use caller-supplied Wakaru, and makes the weaker resource containment on that host explicit in the result instead of reusing Linux wording.
Problem and expected behavior
Smallest trigger (macOS arm64, Wakaru 1.14.0 installed from npm):
Observed on
rea-agents6.7.0:Two checks cause it:
resolveWakaruCommandrequiresprocess.platform === "linux" && process.arch === "x64", and every run is launched through util-linuxprlimit, which does not exist on macOS.Expected: a configured, working Wakaru runs on macOS arm64, bounded as far as the host allows, and the result says which bounds apply.
Change and scope
The resource limiter is now chosen from the host (
WakaruCommand.ts):prlimitbinary, same argument list, sameREA_JAVASCRIPT_PRLIMIT_COMMANDoverride./bin/sh -c 'ulimit -f N && ulimit -c 0 && ulimit -t 120 && exec "$0" "$@"' <engine> <args...>.-fisRECOVERY_LIMITS.outputBytes / 512blocks,-c 0disables core dumps,-tis the 120 s CPU limit.&&, so a limit that cannot be set stops the run instead of starting the engine unbounded.$0,"$@"), never interpolated into the script.REA_JAVASCRIPT_PRLIMIT_COMMANDis not used on this host.macOS does not allow an address-space ceiling:
ulimit -vandulimit -dfail withInvalid argument, and a 200 MB allocation succeeds underulimit -v 65536. So the 1 GiB memory cap that Linux applies is not enforced on macOS. The result's limitations now come fromrecoveryLimitations(limiterKind): the Linux string is unchanged, and the macOS string states that memory use is not capped.RECOVERY_LIMITATIONSkeeps its existing value.Not included: Intel macOS, Windows, and Linux arm64 (not verified). A memory ceiling for macOS.
Contract and boundary impact
resolveWakaruCommand) and command construction (runWakaruCommand).limitationsstrings differ on macOS. The capability-inventory remediation text and the refusal message now mention macOS arm64.resource_limiterreports/bin/shon macOS.execs the engine, so the supervised process is the engine.docs/javascript-recovery.md).Expected effects:
Evidence and regression coverage
Executed on Darwin 25.6.0 arm64 (macOS), unless noted.
Tests added or updated (
src/javascript/recovery/WakaruCommand.test.ts, 7 new):/bin/sh/shell-ulimitwithout requiring prlimit;prlimit+ args) is asserted byte-for-byte unchanged;$(...)and spaces does not reach the script);ulimit -f,-c,-tshows262144,0,120were applied before it started.Base reproduction: installed
rea-agents6.7.0 withREA_WAKARU_COMMANDset to the darwin binary returns thecapability_unavailablerefusal above.User-visible output with this branch (compiled with
tsc+scripts/bundle-runtime.mjs), recovering a real 73 KB webpack bundle with Wakaru 1.14.0 darwin-arm64:runtime_equivalence: "unknown";macOS adapter: one worker, 120-second CPU and wall-clock deadline, ... macOS cannot enforce an address-space ceiling, so memory use is not capped. ...Remaining proof gaps: the Linux real-provider workflow (
verify:javascript:recovery,real-javascript-recovery.yml) was not run here; Linux behavior is covered only by the unchanged-invocation unit test. Intel macOS is untested.Observed, derived, and inferred claims remain distinguishable.
Artifact identity, source provenance, and failed attempts remain preserved.
Unsupported, incomplete, unavailable, or uncertain outcomes remain visible.
Validation performed
npx vitest run src/javascript/recovery/WakaruCommand.test.ts— 14 passed (includes the darwin-arm64 real-host test).npx vitest run wakaru recovery Recovery CapabilityInventory capabilit— 153 passed, 7 failed, 44 skipped. The same 7 fail on the base commit without this change (hopperStartupRecovery,sessionEvidenceRecovery,processCleanupRecoveryCli: they need a builtdist/or Hopper). Base run: 146 passed, 7 failed.npx tsc --noEmit— exit 0.npx oxfmt --checkon the changed paths — all files correctly formatted.npx oxlint src/javascript/recovery src/application/CapabilityInventory.ts— 8 warnings before and after (none new).npm run verify:module-boundaries— passed (2231 source files).npm run check,verify:javascript:recovery, Linux CI.Compatibility, safety, and release
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type(scope): outcome.🤖 Generated with Claude Code
🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.