diff --git a/nireports/assembler/__init__.py b/nireports/assembler/__init__.py
index a51934cd..e69de29b 100644
--- a/nireports/assembler/__init__.py
+++ b/nireports/assembler/__init__.py
@@ -1,3 +0,0 @@
-"""
-Aggregate reports into an HTML document.
-"""
diff --git a/nireports/assembler/data/default.yml b/nireports/assembler/data/default.yml
index 653b7338..e7c3d686 100644
--- a/nireports/assembler/data/default.yml
+++ b/nireports/assembler/data/default.yml
@@ -1,4 +1,4 @@
-package: nireports
+packagename: nireports
sections:
- name: Summary
reportlets:
@@ -173,5 +173,37 @@ sections:
in green; noise components in red.
subtitle: ICA Components classified by AROMA
- name: About
+ nested: true
reportlets:
- - bids: {datatype: figures, desc: about, suffix: T1w}
+ - custom: boilerplate
+ path: '{reportlets_dir}/sub-{subject_id}/'
+ bibfile: ['nireports.assembler', 'data/tests/boilerplate.bib']
+ caption: We kindly ask to report results preprocessed with this tool using the following boilerplate.
+ title: Methods
+ - custom: errors
+ path: '{reportlets_dir}/sub-{subject_id}/log/{run_uuid}'
+ captions: NiReports may have recorded failure conditions.
+ title: Errors
+ - metadata:
+ Execution provenance:
+ NiReports version: '23.0.1'
+ NiReports command: |
+ /opt/conda/bin/fmriprep /data /out participant --sloppy --write-graph
+ --mem-mb 14336 --nthreads 4 -vv --anat-derivatives /opt/smriprep/subjects
+ -w /scratch --output-spaces fsaverage5
+ Date processed: '2023-03-12 03:15:45 +0000'
+ Dataset information:
+ Dataset name: 'Test example'
+ Participant ID: '00017'
+ Split Nested_key1: value1
+ Split Nested_key2: value1
+ settings:
+ # By default, only the first dictionary will be expanded.
+ # If folded is true, all will be folded. If false all expanded.
+ folded: true
+ # If an ID is not provided, one should be generated automatically
+ id: 'about-metadata'
+ caption: |
+ Thanks for using NiReports. The following information may assist in
+ reconstructing the provenance of the corresponding derivatives.
+ title: Reproducibility and provenance information
diff --git a/nireports/assembler/data/report.tpl b/nireports/assembler/data/report.tpl
index c5a81171..76b827cc 100644
--- a/nireports/assembler/data/report.tpl
+++ b/nireports/assembler/data/report.tpl
@@ -5,9 +5,8 @@