[ANNSstudy]

Summary

Implement PowerMemMiddleware for LangChain v1 agents, providing PowerMem as a reusable long-term memory layer.

Changes

• Retrieve relevant memories before model calls
• Inject retrieved memories into model-visible context
• Persist the latest user message and assistant response after agent execution
• Respect save_interactions=False
• Use the explicitly configured user_id
• Fail open when PowerMem search or persistence fails
• Support synchronous and asynchronous agent invocation
• Preserve existing system prompts when injecting memory context

Testing

Executed from the repository root:

uv run --no-project \
  --python 3.11 \
  --with-editable "." \
  --with-editable "packages/powermem-langchain[test]" \
  pytest packages/powermem-langchain/tests -q


##result
6 passed, 3 third-party dependency warnings

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[LINxiansheng]

LangChain Contract Score

LangChain Contract Score
========================
score: 100.00 / 100
suites: 2
rule: A weighted capability receives credit only when it passes on every configured Python suite and all declared prerequisite capabilities also receive credit. Gate tests are reported but do not add points.

Public import contract: PASS (gate)
  py311: passed
  py312: passed
Retrieve memory before model call: PASS (35/35)
  py311: passed
  py312: passed
Persist interaction after agent run: PASS (25/25)
  py311: passed
  py312: passed
Disable interaction persistence: PASS (10/10)
  py311: passed
  py312: passed
Fail-open on search error: PASS (15/15)
  py311: passed
  py312: passed
Async memory injection: PASS (15/15)
  py311: passed
  py312: passed

LangChain Contract Report

LangChain Contract Report
=========================
score: 100.00 / 100
rule: A weighted capability receives credit only when it passes on every configured Python suite and all declared prerequisite capabilities also receive credit. Gate tests are reported but do not add points.

Suite Summary
-------------
py311: passed=6/6, failures=0, errors=0, skipped=0
py312: passed=6/6, failures=0, errors=0, skipped=0

Gate Checks
-----------
Public import contract [gate] PASS
  - py311: passed
  - py312: passed

Weighted Breakdown
------------------
Retrieve memory before model call [35/35] PASS
  - py311: passed
  - py312: passed
Persist interaction after agent run [25/25] PASS
  - py311: passed
  - py312: passed
Disable interaction persistence [10/10] PASS
  - py311: passed
  - py312: passed
Fail-open on search error [15/15] PASS
  - py311: passed
  - py312: passed
Async memory injection [15/15] PASS
  - py311: passed
  - py312: passed

Workflow run