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Python: fix(core): stop losing multiline consolidated memories on reload - #9240
Yufeng He (he-yufeng) wants to merge 7 commits into
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The write path normalizes every memory through _normalize_memory_text before it reaches a record, but _consolidate_topic hands the LLM's memories strings to MemoryTopicRecord raw. A consolidated memory with a line break is written by to_markdown as a bullet whose continuation lands on a non-bullet line, and from_markdown only reads "- " bullets, so a fresh store silently returns just the first line while the raw file still shows the rest. MemoryTopicRecord now normalizes each memory at construction, keeping the existing drop-empty tolerance, so single-line memories are a record invariant and the markdown round-trip is stable no matter which path supplied the text. Verified with the full agent-framework-core suite: 8536 tests, 0 failures; ruff and pyright clean on the changed files. Signed-off-by: Yufeng He <40085740+he-yufeng@users.noreply.github.com>
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🟢 Approval recommended
The focused normalization fix addresses the reported data loss and is covered at both record and consolidation levels.
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What changed in this PR
Normalizes memory text at record construction to prevent multiline consolidated memories from being truncated after Markdown reload.
Changes:
- Enforces single-line, deduplicated memory records.
- Adds unit and consolidation round-trip coverage for LF and CRLF content.
| File | Description |
|---|---|
python/packages/core/agent_framework/_harness/_memory.py |
Normalizes memories during record initialization. |
python/packages/core/tests/core/test_harness_memory.py |
Tests normalization and fresh-store reload behavior. |
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Yufeng He (@he-yufeng) Thanks for the contribution. The current PR template's required AI Assistance field is unanswered. Please update the PR body to state whether material AI assistance was used and, if so, identify the assisted areas. |
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The constructor normalization only covers memories constructed after the fix; a pre-normalization file still loses its continuation on load because the memories section ignores bare lines. Fold a non-empty bare line back into the bullet it continues and cover the legacy shape, round-trip included.
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Eduard van Valkenburg (@eavanvalkenburg) done, the body now uses the current template and the AI Assistance field is filled in (assisted areas: implementation, tests, PR description). |
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| def _normalize_memory_text(memory: str) -> str: | ||
| normalized = " ".join(memory.strip().split()) | ||
| """Fold line breaks without changing meaningful spaces or tabs within a line.""" | ||
| normalized = re.sub(r"\s*(?:\r\n|\r|\n)\s*", " ", memory.strip()) |
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Yufeng He (@he-yufeng), this folds only CR/LF separators, but from_markdown uses splitlines(), which also splits on U+2028, U+2029, NEL, vertical tab, form feed, and related separators. Those values can still turn one memory into a heading, bullet, or summary fragment on reload. Please normalize every separator recognized by splitlines() while preserving intended inline spaces, with representative round-trip regressions.
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Implemented in 91ef97447.
Normalization now covers every separator recognized by str.splitlines(): CR/LF variants, VT, FF, the three record separators, NEL, U+2028, and U+2029. Inline spaces and tabs remain unchanged.
The parameterized regression covers all eleven spellings. The eight non-CR/LF cases failed before this change and all eleven now pass, including Markdown round trips. The complete memory test file and scoped pre-commit checks pass.
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This feature is being deprecated in favor of FileMemoryProvider. See #10273. |
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Motivation & Context
consolidate_memoriesaccepts a valid JSON response whosememoriesarray contains a string with an ordinary line break and reports success, but a freshMemoryFileStorereads back only the first line:to_markdownwrites the break verbatim as a non-bullet line in the Memories section, andfrom_markdownonly reads-bullets, so the continuation silently disappears on reload while the raw file still shows it. The write path does not hit this because_merge_memorynormalizes every memory through_normalize_memory_textbefore it reaches the record.Description & Review Guide
MemoryTopicRecord.__init__now runs each memory through_normalize_memory_text, the same normalizer the write path uses, while keeping the existing drop-empty tolerance. Single-line memories become a record invariant, so the markdown round-trip is stable no matter which path supplied the text.write_memory: line breaks fold into spaces instead of truncating on the next read. The on-disk format is unchanged, and existing single-line records are byte-identical after a rewrite._consolidate_topic, so every current and future intake path inherits the invariant.Related Issue
Fixes #9228
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AI assistance details: implementation, tests, and this PR description. The regression tests listed in the checks were actually run locally and pass.
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