[AlexanderFengler]

Closes #1440

• ddm (ddm.onnx): z bound (0.0, 1.0) → (0.1, 0.9), the training range (ssms param_bounds, Fengler et al. 2021).
• ddm_sdv (ddm_sdv.onnx): t and sv lower edges 0.0 → 0.001, as recorded in the network's HF data_details.
• Only config bounds change; no core code. The analytical and blackbox likelihoods are unchanged.
• What users see with these LAN likelihoods: default z prior Uniform(0.1, 0.9); sv prior Uniform(0.001, 2.5); log_logit maps z into (0.1, 0.9); a fixed sv=0.0 now raises ValueError (use model="ddm"); RLSSM decision processes inherit the new bounds.
• test_lan_bounds_match_training: drops the ("ddm", "z") waiver and the lower-edge rounding tolerance; pins the corrected values. The audit table in LAN default bounds for ddm (z) and ddm_sdv (t, sv) lie outside the networks' training ranges #1440 shows every other built-in LAN config already matches its training range.
• Changelog: 0.5.1 item 19. Pass the observed choice to the CPN as its last input (#1324) #1439 also appends to that list, so whichever merges second renumbers.
• Ran: uv run pytest tests/ -m "not slow" (1543 passed), ruff check, ruff format --check, prek hooks (incl. pyrefly, mypy).

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Summary by CodeRabbit

• Behavior Changes
  • Approximate DDM models now use a z range of 0.1–0.9. In ddm_sdv, t and sv now have minimum values of 0.001; other parameter bounds are unchanged.
  • Default priors and likelihood floors reflect the updated bounds. HSSM-built RLSSM configurations use them, while bounds from RLSSMConfig.from_ssms_model() remain unchanged.
  • Analytical and black-box likelihood behavior is unchanged.
• Documentation
  • Updated the changelog to describe the revised bounds and their effects.

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• docs/changelog.md

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• docs/changelog.md

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Walkthrough

The approx_differentiable bounds for ddm.z, ddm_sdv.t, and ddm_sdv.sv now match their network training ranges. Tests pin those bounds, and the changelog describes the changes.

Changes: LAN training-range bounds

Layer / File(s)	Summary
Update LAN bounds and validation src/hssm/modelconfig/ddm_config.py, src/hssm/modelconfig/ddm_sdv_config.py, tests/unit/modelconfig/test_lan_bounds_match_training.py, docs/changelog.md	The LAN bounds change to ddm.z (0.1, 0.9), ddm_sdv.t (0.001, 2.0), and ddm_sdv.sv (0.001, 2.5). Tests use a stricter lower-bound comparison and pin all three ranges. The changelog records the updates and their documented effects.

Priority: Normal

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix · Severity of issue fixed: Medium

Possibly related PRs

• lnccbrown/HSSM#1422: Its RLSSM likelihood specification uses built-in model bounds, including the DDM LAN bounds changed here.

Suggested reviewers: cpaniaguam

Merge Risk: Minimal · up to 1352d

The documented LAN bounds update has no identified outstanding issue and is ready for normal merge checks.

Pre-merge checks: 4 · 1

Failed checks: 1 warning

Check name	Status	Explanation	Resolution
Docstring Coverage		Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentat…	Write docstrings for the functions missing them to satisfy the coverage threshold.

Passed checks: 4 passed

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: updating the ddm and ddm_sdv LAN bounds to stay within the networks' training ranges.
Linked Issues check		Issue #1440 is the only active direct link. The PR changes the ddm LAN z bounds to (0.1, 0.9). It changes ddm_sdv LAN t and sv lower bounds to 0.001. The test removes the ddm.z waiver,…
Out of Scope Changes check		The changed configuration files implement the bounds correction in #1440. The test changes verify the corrected training ranges. The changelog documents the resulting LAN behavior and affected RLSSM c…

Full details: Linked Issues check

Explanation

Issue #1440 is the only active direct link. The PR changes the ddm LAN z bounds to (0.1, 0.9). It changes ddm_sdv LAN t and sv lower bounds to 0.001. The test removes the ddm.z waiver, uses a tight lower-edge comparison, and pins ddm.z, ddm_sdv.t, and ddm_sdv.sv to the training bounds. These changes satisfy the issue's coding requirements. The summary reports no core-code change and unchanged analytical and blackbox likelihoods.

Full details: Out of Scope Changes check

Explanation

The changed configuration files implement the bounds correction in #1440. The test changes verify the corrected training ranges. The changelog documents the resulting LAN behavior and affected RLSSM configuration behavior. No unrelated implementation or configuration change appears in the reviewed change summary.

Full details: Docstring Coverage

Explanation

Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentation-only edits and deletions within surviving functions are included; unchanged diff context and fully deleted functions are excluded. Analyzed 1 functions across 3 files. (1 skipped: 1 unsupported.)

Resolution

Write docstrings for the functions missing them to satisfy the coverage threshold.

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Actionable comments posted: 1

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• 🪄 Fix comments: Fix CodeRabbit comments on this PR

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Inline comments:
Review comments at @docs/changelog.md:
- Line 43: Update the RLSSM bounds statement in the changelog to clarify that
HSSM-registered RLSSMs inherit the new bounds, while
RLSSMConfig.from_ssms_model() uses assembled.bounds and may retain different
bounds.

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Reviewing files that changed from the base of the PR and between cacdd1d and 862cdeb.

Files selected for processing: 4

• docs/changelog.md
• src/hssm/modelconfig/ddm_config.py
• src/hssm/modelconfig/ddm_sdv_config.py
• tests/unit/modelconfig/test_lan_bounds_match_training.py

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