fix(openclaw-plugin): move recall into assemble path

[0xble]

Description

Moves OpenClaw plugin automatic recall onto the context-engine assemble() path by default, while keeping before_prompt_build behind recallPath: "hook" for legacy compatibility. This replaces #1424 with a clean branch scoped to examples/openclaw-plugin.

Related Issue

Fixes #1283. Replaces #1424.

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Performance improvement
• Test update

Changes Made

• Added recallPath config with default assemble and legacy hook.
• Extracted shared recall query and context building into recall-context.ts.
• Injected <relevant-memories> into assembled messages so OpenClaw transformContext callers receive recall even when systemPromptAddition or prompt hooks are not consumed.
• Bounded afterTurn auto-capture with the configured timeout so capture fails open instead of blocking a turn.
• Updated plugin docs and focused tests.

Example

With default config:

{
  "autoRecall": true,
  "recallPath": "assemble"
}

A context-engine assemble() call for:

messages: [{ role: "user", content: "what backend language should we use?" }]

now returns the first user message with a leading <relevant-memories> block, followed by the assembled session summary/history. recallPath: "hook" keeps the previous before_prompt_build behavior for older OpenClaw integrations.

Testing

• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have tested this on the following platforms:
  • Linux
  • macOS
  • Windows

Focused checks run locally:

npx vitest run tests/ut/context-engine-assemble.test.ts tests/ut/context-engine-afterTurn.test.ts tests/ut/tools.test.ts tests/ut/plugin-bypass-session-patterns.test.ts tests/ut/plugin-normal-flow-real-server.test.ts tests/ut/local-startup-failure.test.ts

[github-actions]

Failed to generate code suggestions for PR

[Mijamind719]

感谢关注和贡献代码，before_promt_build hook时注入记忆的逻辑归一到assemble中，已经通过#1835 合入。