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📋 Pull Request Information
Original PR: https://github.com/morluto/rea/pull/6301
Author: @morluto
Created: 10/22/2026
Status: ✅ Merged
Merged: 10/22/2026
Merged by: @morluto
Base:
main← Head:cursor/regex-worker-heap-request-d806📝 Commits (3)
cffa07dfeat(process): make the regex worker heap request configurable6ee3677fix(process): set the regex worker heap floor to the measured startup bound8b9ad21fix(process): raise the regex worker heap floor to 7 MiB📊 Changes
24 files changed (+564 additions, -45 deletions)
View changed files
📝
docs/kuna-provider.md(+1 -1)📝
docs/native-investigation.md(+11 -5)📝
src/application/Doctor.test.ts(+1 -0)📝
src/application/SetupRegistrationEnvironment.ts(+1 -0)📝
src/composition/binary.ts(+1 -0)📝
src/config/environment.ts(+2 -0)📝
src/config/parseConfig.ts(+8 -0)➕
src/config/regexWorkerHeapRequest.test.ts(+159 -0)➕
src/config/regexWorkerHeapRequest.ts(+106 -0)📝
src/config/types.ts(+3 -0)📝
src/contracts/officialToolContracts.ts(+1 -1)📝
src/hopper/HopperProvider.ts(+5 -1)📝
src/hopper/HopperProviderCapabilities.ts(+6 -1)📝
src/hopper/HopperRegexSearch.ts(+6 -0)📝
src/kuna/KunaProvider.ts(+15 -0)📝
src/kuna/KunaProviderCapabilities.ts(+9 -3)📝
src/kuna/KunaQueryWork.ts(+6 -0)📝
src/kuna/KunaSessionClient.ts(+11 -2)📝
src/process/RegexMatcher.test.ts(+62 -1)📝
src/process/RegexMatcher.ts(+69 -29)...and 4 more files
📄 Description
Summary
Part of #6176. The regex worker old-generation request is now
REA_REGEX_WORKER_HEAP_REQUEST_MIB. Unset still requests 128 MiB. This does not cover the issue's decoder heap or MCP startup budgets.Problem and expected behavior
The regex worker requested a fixed 128 MiB old generation, and capability and recovery text said that request had no runtime override. Callers need a named setting whose default is that constant. Invalid values must fail configuration and name the setting. A positive Node
--max-old-space-size, includingNODE_OPTIONS, still overrides the request and is not clamped by the setting.Unset behavior stays a 128 MiB request. A value from 7 to 16384 MiB is the request. Any other value fails startup, doctor, and client-registration configuration and names
REA_REGEX_WORKER_HEAP_REQUEST_MIB. It does not fall back to 128. Setup copies a caller-selected value throughSELECTED_REGISTRATION_SETTINGS.Recovery, capability, and limitation text name the setting, the effective request, the source (
defaultorsetting), the default, the floor, the maximum, and how to change it. They also name the process effective heap when launch flags establish it.Change and scope
src/config/regexWorkerHeapRequest.tsowns the setting. Startup (parseConfig) and doctor (parseEnvironment) resolve it with the same schema. The effective request is stored onAppConfigand passed into Hopper and Kuna, which pass it toRegexMatcher. A directKunaProviderresolves the selected environment instead of ambientprocess.env. An omitted matcher request means the 128 MiB default, not ambientprocess.env.Setup keeps
REA_REGEX_WORKER_HEAP_REQUEST_MIBinSELECTED_REGISTRATION_SETTINGS. A present value is copied into the generated registration. An unset value is omitted.The floor is 7 MiB. On Linux, the production worker (
^aagainst["a"], noNODE_OPTIONS) returnsERR_WORKER_OUT_OF_MEMORYat 6 MiB on Node 24.21.0 and 24.22.1, and on most runs of Node 24.11.0, 24.18.0, and 26.0.0. 7 MiB returned that match on Node 22.19.0, 22.23.4, 24.11.0, 24.18.0, 24.21.0, 24.22.1, 26.0.0, and 26.12.1, so a smaller request is not a matching bound on every supported Node line. The maximum is 16384 MiB, the same ceiling REA already uses for one isolated JavaScript analysis worker. Node starts with a larger flag; this maximum bounds only the REA request. A positive--max-old-space-sizeis reported as the effective heap and is not limited by this floor or maximum.Follow the contribution scope. This is configuration of an existing regex worker request. It does not add a provider or a capability that executes, injects, mutates, or recovers a target. Maintainer scope decision: not applicable. The product decision to make this ceiling a setting is recorded in #6176.
Contract and boundary impact
src/config/regexWorkerHeapRequest.tsparses the setting;parseConfigresolves it before providers match.explicitSetupRegistrationEnvironmentpreserves a caller-selected value when setup writes a registration.search_proceduresandsearch_stringsdescriptions nameREA_REGEX_WORKER_HEAP_REQUEST_MIB, the 128 MiB default, the 7 MiB floor, and the 16384 MiB maximum. Capability and heap failures name the effective request and source.--max-old-space-size, includingNODE_OPTIONS, still overrides it. Percentage,--max-heap-size, env-file, and experimental config-file launches still leave the effective heap unestablished.requested_worker_heap_sourcebesiderequested_worker_heap_mib.docs/public/product-catalog.json), package, or installation impact (CI generates and validates ignored catalogs andskills/; edit authored instructions in.agents/skills/reverse-engineer-anything/and never commit build outputs): tool descriptions changed in source contracts. No authored skill text claimed the heap request had no override.Expected effects (check known effects; use documentation-only on its own).
Unchecked items do not establish absence; leave uncertainties visible.
Evidence and regression coverage
6; Hopper/Kuna capability text for a 256 MiB request while ambientprocess.envis8; a selected request of 256 stays in effect, and--max-old-space-size=64still overrides it to 64 MiB without clamping. A clean Node process, withNODE_OPTIONSremoved and without--import tsxonexecArgv, calls productionmatchRegexValuesat the floor and matches^aagainst["a"].ERR_WORKER_OUT_OF_MEMORYat 6 MiB (5/5) and{ok:true, indices:[0]}at 7 MiB (5/5). The same 7 MiB production call matched on Node 22.19.0, 22.23.4, 24.11.0, 24.18.0, 26.0.0, and 26.12.1 (3/3 each). Raw worker repeats at 6 MiB were 0/10 matches on 24.21.0 and 24.22.1, 1/10 on 24.11.0 and 24.18.0, and 2/10 on 26.0.0; 7 MiB was 10/10 on those builds.The effective REA_REGEX_WORKER_HEAP_REQUEST_MIB value is 128 MiB (source default; default 128 MiB, floor 7 MiB, maximum 16384 MiB). Set REA_REGEX_WORKER_HEAP_REQUEST_MIB in the environment that starts REA to a decimal integer from 7 to 16384, then restart REA.A 256 MiB setting usessource settingand256 MiB.resolveRegexWorkerHeapand capability text, not by exhausting a 256 MiB worker.For evidence-bearing changes:
Validation performed
npm run check:fast— typecheck and lint, 2 tasks successful (6.695s).npm run format:check— all matched files use the correct format (4944 files).npm run test:local -- src/config/regexWorkerHeapRequest.test.ts src/process/RegexMatcher.test.ts src/application/Doctor.test.ts— 124 passed.npm run test:focused -- tests/boundary/process/regexMatcher.test.ts tests/boundary/filesystem/clientConfigurationEnvironment.test.ts— 43 passed, 10 skipped. The real-worker floor test is in the process-boundary file.Compatibility, safety, and release
REA_REGEX_WORKER_HEAP_REQUEST_MIB=6is now a configuration error. It previously passed configuration and then failed regex search on supported Node 24 and Node 26.0.0. A positive--max-old-space-sizestill overrides the request.resourceLimits.maxOldGenerationSizeMb. The setting changes only that REA request. It does not raise a Node--max-old-space-sizealready applied to the process, and it does not change target memory.Author readiness
Human owner: @morluto
Before merge
type(scope): outcome.🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.