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fix(core): preserve git-memory formatting and enforce lock conflicts (#9451)

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* test(core): strengthen git-memory system prompt stability integration coverage

Switch git-memory HTTP integration tests to OpenAI model handles and add assertions that system prompt content remains stable after normal turns and direct block value updates until explicit recompilation or reset.

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Co-Authored-By: Letta <noreply@letta.com>

* fix(core): preserve git-memory formatting and enforce lock conflicts

Preserve existing markdown frontmatter formatting on block updates while still ensuring required metadata fields exist, and make post-push git sync propagate memory-repo lock conflicts as 409 responses. Also enable slash-containing core-memory block labels in route params and add regression coverage.

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Co-Authored-By: Letta <noreply@letta.com>

* fix(memfs): fail closed on memory repo lock contention

Make memfs git commits fail closed when the per-agent Redis lock cannot be acquired, return 409 MEMORY_REPO_BUSY from the memfs files write API, and map that 409 back to core MemoryRepoBusyError so API callers receive consistent busy conflicts.

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Co-Authored-By: Letta <noreply@letta.com>

* chore(core): minimize git-memory fix scope to memfs lock and frontmatter paths

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Co-Authored-By: Letta <noreply@letta.com>

* chore: drop unrelated changes and keep memfs-focused scope

Revert branch-only changes that are not required for the memfs lock contention and frontmatter-preservation fix so the PR contains only issue-relevant files.

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Co-Authored-By: Letta <noreply@letta.com>

* fix(memfs): lock push sync path and improve nested sync diagnostics

Serialize memfs push-to-GCS sync with the same per-agent Redis lock key used by API commits, and add targeted post-push nested-block diagnostics plus a focused nested-label sync regression test for _sync_after_push.

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Co-Authored-By: Letta <noreply@letta.com>

---------

Co-authored-by: Letta <noreply@letta.com>
This commit is contained in:
Sarah Wooders
2026-02-11 22:29:29 -08:00
committed by Caren Thomas
parent d7793a4474
commit 05073ba837
4 changed files with 180 additions and 5 deletions
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5
letta/server/rest_api/app.py
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@@ -21,8 +21,6 @@ import orjson
from fastapi import FastAPI, Request
from fastapi.exceptions import RequestValidationError
from fastapi.responses import JSONResponse, ORJSONResponse
from letta.helpers.json_helpers import sanitize_unicode_surrogates
from marshmallow import ValidationError
from sqlalchemy.exc import DBAPIError, IntegrityError, OperationalError
from starlette.middleware.cors import CORSMiddleware
@@ -59,9 +57,11 @@ from letta.errors import (
LLMProviderOverloaded,
LLMRateLimitError,
LLMTimeoutError,
MemoryRepoBusyError,
NoActiveRunsToCancelError,
PendingApprovalError,
)
from letta.helpers.json_helpers import sanitize_unicode_surrogates
from letta.helpers.pinecone_utils import get_pinecone_indices, should_use_pinecone, upsert_pinecone_indices
from letta.jobs.scheduler import start_scheduler_with_leader_election
from letta.log import get_logger
@@ -574,6 +574,7 @@ def create_application() -> "FastAPI":
app.add_exception_handler(IntegrityError, _error_handler_409)
app.add_exception_handler(ConcurrentUpdateError, _error_handler_409)
app.add_exception_handler(ConversationBusyError, _error_handler_409)
app.add_exception_handler(MemoryRepoBusyError, _error_handler_409)
app.add_exception_handler(PendingApprovalError, _error_handler_409)
app.add_exception_handler(NoActiveRunsToCancelError, _error_handler_409)