v0.2.0

🎭 NeMo User Sim 0.2.0 is the first stable release. Since 0.2.0rc1 it adds UK and Germany locales, financial services banks for France, the UK and Germany, and checks that stop a run before any model call when its inputs are missing.

Highlights

• UK and Germany: en_GB and de_DE are supported locales, with personas from Nemotron-Personas-UK and Nemotron-Personas-Germany; every probe runs in both. #70, #72, #73
• Financial services: banks for France, the UK and Germany, in each locale's language, notation and tools. #63, #65, #66, #67, #68, #71
• Checks before any model call: a run stops before calling a model when a locale's persona dataset or a probe's bank is missing. #60, #64
• Evaluation: a row fails when its probe's protocol check fails, and report cells count placeholder and machine-translated rows. The evaluator scores the tool calls a safety_agentic row recorded, and reports show when a chat-pressure conversation stopped on capitulation. #76, #78
• Review flags: a row that draws on an unreviewed bank entry records a warning naming the task, bank and bank version, with SME verification recommended. The fact, safety and multilingual-parity banks name who wrote or reviewed each entry. #81
• Model facades outside a pipeline: build a models file's model facades for runs outside a Data Designer pipeline. #62
• CLI: longer default timeouts for the bundled judge, summary and tool-response models, and corrected command help. #75
• Fewer dependencies: drop the unused seaborn, matplotlib and langdetect dependencies. #44
• Documentation: updated README, guides and diagrams. #59, #77, #80

Security

• Require Data Designer 0.9.7 or later, whose data-designer-config requires certifi>=2026.10.19, a CA bundle without the emSign ECC Root CA - G3 root. #82
• Require uv 0.13.4 or newer for development, since its bundled certificates also leave out that root, and lock certifi 2026.10.19. #79
• New installs on Python 3.11 and later get Pillow 13 and its security fixes. Python 3.10 resolves Pillow 12.3.0, since Pillow 13 requires Python 3.11. #82

Upgrade guidance

Update your installer and usersim:

python -m pip install --upgrade "pip>=26.2.2"
python -m pip install --upgrade "usersim>=0.2.0"

In a uv project, upgrade uv to 0.13.4 or newer (uv self update for a standalone install), then run uv add "usersim>=0.2.0". Existing environments and lockfiles keep their installed Pillow until you upgrade it: python -m pip install --upgrade pillow, or uv lock --upgrade-package pillow in a uv project.

Endpoints whose certificate chains rely on the removed root may need updated chains; see the upstream advisory.

Python 3.10 is supported through the 0.2 releases. Use Python 3.11 or later for Pillow 13.

Full changelog: v0.2.0rc1...v0.2.0

v0.2.0rc1

What's Changed

• chore: complete Apache-2.0 notices and embed the DCO text by @3mei in #1
• Yev/chore/pre release hardening by @3mei in #2
• style: format the codebase and widen the lint rule set by @3mei in #3
• ci: add continuous integration, live provider checks and community files by @3mei in #4
• docs: correct published documentation and position for agents by @3mei in #7
• ci: Bump the all-actions group with 2 updates by @dependabot[bot] in #6
• chore: update license for early access by @3mei in #8
• feat!: run the simulator and evaluator on the async engine by @3mei in #9
• ci: Bump astral-sh/setup-uv from 10.1.0 to 10.2.0 in the all-actions group by @dependabot[bot] in #11
• feat(probes): add the identity_disclosure probe by @3mei in #12
• fix(engine): declare the guarded health_* columns by @isarasua in #13
• feat(engine): add external probe episode runtime by @ffrujeri in #15
• fix(evaluator): normalize strict response schemas by @ffrujeri in #14
• fix: show judges their rubric and send reasoning settings models accept by @3mei in #17
• chore: license the project under Apache-2.0 by @3mei in #18
• ci: Bump NVIDIA-NeMo/FW-CI-templates/.github/workflows/_semantic_pull_request.yml from 1.10.1 to 1.12.0 in the all-actions group by @dependabot[bot] in #19
• feat: mark Data Designer usage events as User Sim's by @3mei in #20
• ci: Bump NVIDIA-NeMo/FW-CI-templates/.github/workflows/_semantic_pull_request.yml from 1.12.0 to 1.12.2 in the all-actions group by @dependabot[bot] in #27
• fix!: support pandas 3 by @3mei in #28
• fix: label sampled evaluations, write reopenable panels, tidy notebooks by @3mei in #29
• fix(runtime): accept a simulated user's tool calls in hosted episodes by @isarasua in #25
• fix(engine): warn when a probe returns a column the run will drop by @isarasua in #26
• build: support Python 3.10 to 3.14 by @3mei in #32
• build!: publish the distribution as usersim by @3mei in #37
• refactor(engine)!: remove the never-called should_continue_after_turn hook by @isarasua in #33
• fix(storage): write simulation runs under a lock and publish them whole by @isarasua in #34
• fix(cli): record the command in plain simulate's run manifest by @isarasua in #36
• feat(cli): run stored episode rows with simulate --inputs by @isarasua in #30
• feat: opt-in replay of the assistant's own earlier reasoning by @isarasua in #31
• ci: create a GitHub release from a version tag by @3mei in #38
• build: set the version to 0.2.0rc1 by @3mei in #39
• feat(eval): warn when a trajectory_id appears more than once in a run by @isarasua in #41
• build(deps): require data-designer 0.9.5 and rely on its extra_body merge by @3mei in #42

New Contributors

• @3mei made their first contribution in #1
• @dependabot[bot] made their first contribution in #6
• @isarasua made their first contribution in #13
• @ffrujeri made their first contribution in #15

Full Changelog: https://github.com/NVIDIA-NeMo/UserSim/commits/v0.2.0rc1