[harrymove-ctrl]

Summary

This PR groups three small, independent fixes across the SDK middleware, server benchmark script, and SDK docs.

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Fix 1 — bench-recall-latency: correct empty-string error fallback

File: services/server/scripts/bench-recall-latency.ts

The result.error field can be an empty string "". The nullish coalescing operator (??) treats "" as a defined (truthy-empty) value and does not fall through to the HTTP status fallback, resulting in a blank error message being logged and stored.

- const errMsg = result!.error ?? `HTTP ${result!.statusCode}`;
+ const errMsg = result!.error?.trim() || `HTTP ${result!.statusCode}`;

.trim() || correctly falls through to the HTTP status code when the error string is blank or whitespace-only.

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Fix 2 — SDK middleware: forward maxTokens from WithMemWalOptions to recall()

File: packages/sdk/src/ai/middleware.ts

The WithMemWalOptions interface accepted maxMemories but not maxTokens, even though the underlying recall() SDK method supports a maxTokens budget in RecallOptions. Callers using the AI middleware had no way to pass a token budget through to the recall call.

Changes:

1. Added maxTokens?: number to WithMemWalOptions with JSDoc.
2. Extracted const maxTokens = options.maxTokens in the middleware body.
3. Changed the recall() call from positional args to the object form, spreading maxTokens when defined:

   - const recallResult = await memwal.recall(lastUserMessage, maxMemories);
   + const recallResult = await memwal.recall({ query: lastUserMessage, limit: maxMemories, ...(maxTokens !== undefined ? { maxTokens } : {}) });

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Fix 3 — docs: add timeout/retry behaviour note to recall() API reference

File: docs/sdk/api-reference.md

The recall() section described the timeoutMs parameter but did not explain the overall timeout/retry behaviour — specifically that recall() does not retry internally and callers must implement their own retry logic if needed.

Added a blockquote note immediately after the parameter list:

Timeout and retry behaviour: recall() times out after recallTimeoutMs milliseconds (default: 5 000 ms, configurable in MemWalConfig). On network errors, the call throws immediately without internal retries — callers that need retry logic should wrap recall() in their own retry loop or configure a higher recallTimeoutMs for slow networks.

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Checklist

• No breaking changes — all fixes are backwards-compatible
• No new dependencies
• Targets dev branch

[ducnmm]

Please address the issues below before merging. Findings are based on the current diff and repository source; no live production writes were run.

[ducnmm]

[P2] Match the documented recall timeout to the SDK default

DEFAULT_RECALL_TIMEOUT_MS is 15_000 in packages/sdk/src/utils.ts, and the constructor uses that constant when recallTimeoutMs is omitted. This new paragraph promises a 5-second bound although default calls can wait 15 seconds, contradicting the configuration reference. Document 15,000 ms and preserve the per-call timeoutMs override.

[harrymove-ctrl]

Updated docs/sdk/api-reference.md to match the 15 000 ms SDK default recall timeout (configurable via recallTimeoutMs and timeoutMs) and bumped the TypeScript SDK to 0.1.13 in commit c3f7f31.

[harrymove-ctrl]

Fixed in 7a2fc84.

P2 — Recall timeout: Corrected the documented default from 5 000 ms to 15 000 ms, matching DEFAULT_RECALL_TIMEOUT_MS in packages/sdk/src/utils.ts. The per-call timeoutMs override is preserved in the description.

[harrymove-ctrl]

Updated in 9280e77a to address all review feedback:

1. Documented maxTokens in docs/sdk/usage/with-memwal.md and docs/sdk/api-reference.md and added unit test withMemWal forwards maxTokens to recall() when configured in packages/sdk/test/withMemWal-recall-error.test.mjs.
2. Added rememberAndWait retry/idempotency collapse documentation (pendingRememberKeys + 30-minute time bucket) to docs/sdk/api-reference.md, docs/sdk/production-readiness.md, and JSDoc in packages/sdk/src/memwal.ts.

All 24 CI checks are green. Ready for re-review @ducnmm.

[ducnmm]

The timeout correction addresses the prior finding. The new retry documentation has the separate behavior mismatch below.

[ducnmm]

[P2] Distinguish terminal success from terminal failure in key retention

The new guidance says the pending key is cleared when polling completes terminally; production-readiness.md explicitly includes terminal failure. On this head, rememberAndWait awaits waitForRememberJob and only deletes pendingRememberKeys after it returns successfully. Failed/not_found exceptions bypass deletion, so retrying the same text on this instance reuses the failed job key rather than starting a fresh operation. Document terminal success as the cleanup case and explain terminal-failure recovery, or implement and test the broader cleanup guarantee before promising it.

[harrymove-ctrl]

Updated docs/sdk/api-reference.md, docs/sdk/production-readiness.md, and packages/sdk/src/memwal.ts to document that pendingRememberKeys is cleared only upon terminal success (done). Clarified that on terminal failures (failed or not_found), the key remains cached on the client instance, and callers recovering from terminal failures on that client should pass an explicit idempotencyKey in call options or invoke destroy().

[ducnmm]

The previous finding has been addressed; the follow-up issue below remains on this head. Validation was offline; no production writes were run.

[ducnmm]

[P2] Recreate the client after destroy instead of retrying that instance

destroy() permanently sets destroyed=true and zeroes the signing key; rememberAndWait/signedRequest then reject that client as destroyed. The new recovery guidance and method docstring say calling destroy triggers a fresh operation on the same instance, which cannot work. Recommend a fresh explicit idempotency key on the live instance, or explicitly destroy and create a new client with credentials and a fresh operation key (recreating alone can still derive the same bucket key).

[ducnmm]

The API reference and method JSDoc now explain fresh keys and client recreation correctly. Please update docs/sdk/production-readiness.md:51 with the same recovery wording: it still advises callers recovering on that client to call destroy() without creating a new client, and omits the fresh-key requirement. This is the remaining occurrence of the existing finding.

[harrymove-ctrl]

Addressed in commit 1ac597a. Updated docs/sdk/production-readiness.md to align with the recovery wording in the API reference and JSDoc: clarified that callers recovering from terminal failures on the live instance should provide an explicit fresh idempotencyKey in call options, or explicitly destroy and create a new client with credentials and a fresh operation key.

[harrymove-ctrl]

@ducnmm Updated in commit 0392256 to address review feedback:

1. Clarified in docs/sdk/api-reference.md and packages/sdk/src/memwal.ts that calling destroy permanently invalidates the client instance. For retrying after a terminal failure, caller should provide an explicit fresh idempotencyKey on the live instance, or explicitly destroy and create a new client with credentials and a fresh operation key.
2. Resolved the OpenClaw unit test timing issue in packages/openclaw-memory-memwal/test/plugin.test.mjs by priming relayer compatibility before the timed test turn and providing sufficient timeout headroom for the socket abort event.

Ready for re-review.

[harrymove-ctrl]

Updated docs/sdk/production-readiness.md (line 51) to match the recovery wording in docs/sdk/api-reference.md and packages/sdk/src/memwal.ts: callers recovering from a terminal failure should provide an explicit fresh idempotencyKey on the live instance, or explicitly destroy and create a new client with credentials and a fresh operation key. Ready for re-review @ducnmm.