fix(http): add exponential backoff for rate limiting (429 errors)

[YonghaoZhao722]

Problem

The current pRetry configuration only specifies { retries: 2 } with no delay between attempts. When the server returns a 429 (rate limit) or 5xx error, the client immediately retries twice without backoff, causing repeated failures.

Solution

Add exponential backoff with jitter to all pRetry calls:

• minTimeout: 1000 - Initial delay of 1 second
• maxTimeout: 8000 - Max delay capped at 8 seconds
• factor: 2 - Exponential multiplier (1s → 2s → 4s...)
• randomize: true - Adds jitter to prevent thundering herd
• onFailedAttempt - Logs retry attempts for debugging

Changes

Modified packages/clawdhub/src/http.ts:

• Added createRetryOptions() helper function
• Replaced all { retries: 2 } with backoff configuration
• Each operation has a descriptive name for logging

Backwards Compatibility

Non-retryable errors (4xx except 429) still abort immediately via AbortError. Only 429 and 5xx errors trigger the backoff retry.

---

Co-authored-by: Claude claude@anthropic.com
Co-authored-by: Clawdbot clawdbot@openclaw.ai

Greptile Summary

Added exponential backoff configuration to all HTTP retry operations to handle rate limiting (429) and server errors (5xx) more gracefully. The implementation introduces a createRetryOptions() helper that configures p-retry with 1-8 second delays, exponential factor of 2, randomized jitter, and debug logging for retry attempts.

Confidence Score: 5/5

• This PR is safe to merge with minimal risk
• The change is well-scoped, adds proper exponential backoff to handle rate limiting gracefully, maintains existing error handling behavior (non-retryable errors still abort immediately), and has comprehensive test coverage that validates retry behavior for 429 errors and timeouts
• No files require special attention

_{Last reviewed commit: 2d93733}

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