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[PR #4391] [CLOSED] fix(browser): bound observe_web_session windows to the Node.js timer limit #6211
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opened 2026-10-31 01:12:43 +00:00 by bsakaguchi
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📋 Pull Request Information
Original PR: https://github.com/morluto/rea/pull/4391
Author: @Adolanium
Created: 10/16/2026
Status: ❌ Closed
Base:
main← Head:fix/observe-window-timer-bound📝 Commits (2)
63d0cc6fix(browser): bound observe_web_session windows to the Node.js timer limit809bca8Merge remote-tracking branch 'upstream/main' into fix/observe-window-timer-bound📊 Changes
3 files changed (+32 additions, -2 deletions)
View changed files
📝
docs/browser-observation.md(+1 -1)➕
src/domain/browserSession.test.ts(+30 -0)📝
src/domain/browserSession.ts(+1 -1)📄 Description
Summary
Fixes #4392.
observe_web_sessionaccepted any positiveobservation_ms. Values above 2,147,483,647 overflow Node's timer, so the window ended after about 1 ms but the result still reportedend_reason: "window_elapsed"with the largerequested_ms. The input schema now rejects those values, asobserve_web_executionalready does.Problem and expected behavior
observeWebSessionInputSchemainsrc/domain/browserSession.tsdeclaredobservation_ms: z.number().int().min(1).default(10_000)with no maximum.waitForWindowinsrc/browser/CdpObservationSession.tspasses the value straight tosetTimeout. Node clamps a delay above 2^31-1 to 1 ms and printsTimeoutOverflowWarning. The result then claims a window of the requested length elapsed when it did not.observeWebExecutionInputSchemainsrc/domain/webExecution.tsalready uses.max(2_147_483_647)for the same field.Change and scope
observeWebSessionInputSchemaadds.max(2_147_483_647)toobservation_ms. The schema is the owning input boundary: the MCP tool contract insrc/contracts/browserToolContracts.tsuses it asinputSchema, and the CLI command insrc/cli/browserCommands.tsparses its input with it, so both reject the value with anout_of_rangeissue that carriesmaximum.docs/browser-observation.mdstates the accepted range.Not included: other observation tools (
inspect_web_page,discover_webmcp_tools, Electron and JavaScript runtime observation) wait throughdelayWithCancellation, which splits long delays into timer-sized chunks, so they are not affected and keep accepting larger values. #3392 (scenario timers overflow) is related but separate and is not changed here.Follow the contribution scope.
Unresolved scope, authority, side effects, or required verification block
integration. Link the required maintainer scope decision for new providers or
capabilities involving target execution, injection, mutation, or protection
recovery; ordinary fixes within existing boundaries may state "not applicable".
Draft PRs may leave the scope decision pending and the readiness and merge checklists
unchecked. Maintainers can help resolve open questions.
Scope decision: not applicable. This is an input-bound fix for an existing tool.
Contract and boundary impact
observeWebSessionInputSchema, request parsing.observation_msnow hasmaximum: 2147483647in the advertised input schema. Requests above it fail validation instead of returning a falsewindow_elapsedresult.window.requested_mswithend_reason: "window_elapsed"now matches a timer that actually ran for that long.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): the generated catalog will show the new maximum. No authored catalog source lists the bound.Expected effects (check known effects; use documentation-only on its own).
Unchecked items do not establish absence; leave uncertainties visible.
Evidence and regression coverage
src/domain/browserSession.test.tschecks that 2,147,483,647 is accepted, that 2,147,483,648 fails with atoo_bigissue onobservation_mswithmaximum: 2147483647, and that the input JSON Schema fromz.toJSONSchemahasminimum: 1andmaximum: 2147483647.upstream/mainschema the new test fails because 2,147,483,648 is accepted. Separately,setTimeout(…, 2_147_483_648)on Node 24.14.1 printedTimeoutOverflowWarning: 2147483648 does not fit into a 32-bit signed integer. Timeout duration was set to 1.and fired after 7 ms. I did not runobserve_web_sessionagainst a browser.rea observe-web-session <endpoint> <target> --observation-ms 2147483648 --jsonshould now returninvalid_requestwith the issue{ "path": ["observation_ms"], "reason": "out_of_range", "maximum": 2147483647 }. This is source-derived; the CLI boundary tests need a built CLI, which I could not build on this Windows checkout.For evidence-bearing changes:
Validation performed
npm run test:focused -- src/domain/browserSession.test.ts— 1 test passed.npx vitest run src/domain/browserSession.test.tswith theupstream/mainschema — failed (expected true to be falseon the rejection check).npx tsc --noEmit --pretty false— no errors.npx oxlint src/domain/browserSession.ts src/domain/browserSession.test.ts— 0 warnings, 0 errors.npx oxfmt --checkon the three changed files — formatted.npm run build:cached— did not complete on Windows. It stopped because the packaged Windows native artifact is missing, so the CLI boundary tests were not run.Compatibility, safety, and release
observation_msabove 2,147,483,647 (about 24.8 days) now fail validation. Those requests previously ended after about 1 ms while reporting the full window, so no working call is affected.Author readiness
Human owner: @Adolanium
Before merge
type(scope): outcome.🔄 This issue represents a GitHub Pull Request. It cannot be merged through Gitea due to API limitations.