Retry transient Copilot network errors

[cursor]

Changes

• Add retry classification for transient fetch/undici network failures such as TypeError: terminated, ECONNRESET, and UND_ERR_SOCKET.
• Keep existing retry behavior for Copilot HTTP status errors.
• Add focused unit coverage for retryable/non-retryable status codes and network failures.

Testing Criteria

• yarn test "src/app/api/tests/utils/withRetry.test.ts" -- passes (14 tests).
• yarn lint:check -- passes with existing warnings.
• yarn tsc --noEmit -- blocked by pre-existing missing SVG module declarations in src/icons/index.ts.

Notes

• Linear: OUT-3758
• Sentry: TASKS-8B

Impact & Surface Area of Change

• Affects shared Copilot API retry behavior used by server-rendered pages and API authentication/helpers.
• Intended impact is limited to retrying transient network/socket failures that were previously surfaced immediately to Sentry/users.

  

[linear-code]

OUT-3758

[vercel]

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Project	Deployment	Actions	Updated (UTC)
tasks-app	Ready	Preview, Comment	May 19, 2026 6:58pm