POR-22460: Filter cross-origin history SecurityError noise from Sentry

[cursor]

Changes

• Add src/utils/sentryIgnoredErrors.ts with shared browser Sentry ignore patterns for history API instrumentation noise
• Filter NS Pushstate prevention and cross-origin history.replaceState / history.pushState SecurityError messages in instrumentation-client.ts
• Add focused unit tests in src/utils/sentryIgnoredErrors.test.ts

Testing Criteria

• yarn test src/utils/sentryIgnoredErrors.test.ts — 4 tests passed

Notes

• Automated triage for POR-22460: SecurityError: Blocked attempt to use history.replaceState() during portal OAuth/login redirects
• This is browser security noise when code attempts cross-origin history updates (e.g. portal login URL → auth.copilot.app callback), not a tasks-app business-logic failure
• Related prior work: POR-21031 (unmerged) filtered NS Pushstate prevention with the same pattern

Impact & Surface Area of Change

• Client-side Sentry error filtering only; no runtime behavior changes

  

[linear-code]

POR-22460

[vercel]

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Project	Deployment	Actions	Updated (UTC)
tasks-app	Ready	Preview	Aug 15, 2026 9:10pm

[greptile-apps]

Greptile Summary

This PR centralizes browser-side Sentry ignore patterns and adds filters for known cross-origin History API noise while preserving existing fetch-failure filtering.

• Adds shared browser Sentry ignore patterns for pushState and replaceState security errors.
• Connects the shared patterns to client-side Sentry initialization.
• Adds focused tests for ignored and unrelated error messages.

Confidence Score: 5/5

The PR appears safe to merge, with no concrete changed-code defect identified.

The client configuration preserves the existing fetch filters, adds the intended browser History API noise patterns, and includes focused tests showing unrelated application errors remain reportable.

Important Files Changed

Filename	Overview
src/instrumentation-client.ts	Replaces inline fetch-error patterns with the shared browser ignore-pattern list without changing other Sentry initialization behavior.
src/utils/sentryIgnoredErrors.ts	Defines the existing fetch filters alongside the new History API noise filters and exposes a small matching helper.
src/utils/sentryIgnoredErrors.test.ts	Covers the new history patterns, retained fetch patterns, case-insensitive matching, and an unrelated application error.

_{Reviews (1): Last reviewed commit: "POR-22460: Filter cross-origin history S..." | Re-trigger Greptile}