OSS code quality benchmark 2026-06-12

This benchmark compares dpone with open-source data-integration codebases using static maintainability proxies: LOC/SLOC, module hotspots, import coupling, cohesion, SOLID correspondence and Clean OOP correspondence. It also includes an evidence-bounded feature parity matrix from public product documentation; it does not claim runtime performance.

Refresh metadata	Value
Schema version	2
Last refresh	2026-06-30T15:36:13+00:00
Last manual CI runner	codex-local
Workflow	local
GitHub Actions run	local
Source revision	codex/release-v0.62.1@3f562b42ebc8db96a14361ce93353486faa23af4
dpone release under test	0.62.1 / v0.62.1 / 3f562b42ebc8db96a14361ce93353486faa23af4
Release resolution	cli; dirty True
Freshness	fresh 6, stale 0, unavailable 0
Freshness max age policy	30 days; warnings 0
Quality gates	passed (13 passed, 0 failed)

Table of contents

General comparisons

• Tool overview and total corpus
• Customer Trust Center Snapshot
• Benchmark v3 Release Readiness
• Claims Ledger
• Runtime Certification Matrix
• Executable Certification
• Golden Dataset Evidence
• Run Ledger
• Certification Gates
• Quality Budget As Code
• Evidence Warehouse Export
• Evidence Trust & Auditability
• Public Evidence Integrity
• Source Citation Verification
• Independent Analyzer Cross-Validation & Audit Pack
• Feature Parity Matrix
• Governance & Compliance
• Security & Supply Chain
• Operational Reliability
• TCO & Operability
• Industrial Maintainability Index
• Release Delta
• Quality Gates
• Explainable scoring
• Regression summary
• Candidate quality delta
• Remediation backlog
• Trend history
• Architecture delta
• Complexity & Boundary Discipline
• Semantic Maintainability Deep Scan
• Scoring Validity & Calibration
• Scale Readiness & Growth Simulation
• Refactor ROI Roadmap
• Coverage Confidence Matrix
• Architecture Risk Heatmap
• Architecture Taxonomy & Contract Discipline
• Executive scorecard
• Comparable OSS corpus
• Methodology
• Data freshness policy
• Quality reading
• dpone position

Detailed project drill-downs

• dpone: quality reading
• dpone: top modules with tests and without tests
• Airbyte: quality reading
• Airbyte: top modules with tests and without tests
• dlt: quality reading
• dlt: top modules with tests and without tests
• Pentaho Kettle: quality reading
• Pentaho Kettle: top modules with tests and without tests
• Apache Hop: quality reading
• Apache Hop: top modules with tests and without tests
• Sling: quality reading
• Sling: top modules with tests and without tests

Tool overview and total corpus

Test coverage here is a static Test footprint proxy: test SLOC divided by production SLOC. It shows how much test code is present in the published source tree, not runtime branch/line coverage from each project's own test runner.

Project	Description	Total LOC	Total SLOC	LOC without tests	SLOC without tests	Test LOC	Test SLOC	Test footprint	Freshness
dpone	Local dpone framework snapshot, measured as the reference implementation for industrial ETL quality posture.	351,571	295,514	233,810	195,728	117,761	99,786	51.0%	fresh; updated 2026-06-30T15:36:13+00:00
Airbyte	Open-source data movement platform with a broad connector and platform codebase.	675,837	527,195	295,493	222,731	380,344	304,464	136.7%	fresh; updated 2026-06-30T15:36:13+00:00
dlt	Open-source Python data loading library focused on developer-first ELT pipelines.	305,209	235,504	140,090	108,848	165,119	126,656	116.4%	fresh; updated 2026-06-30T15:36:13+00:00
Pentaho Kettle	Mature open-source ETL/data-integration baseline from the Pentaho Kettle lineage.	1,282,446	887,667	1,001,584	686,539	280,862	201,128	29.3%	fresh; updated 2026-06-30T15:36:13+00:00
Apache Hop	Modern open-source orchestration and data-integration platform from the Kettle/Hop lineage.	1,086,054	775,990	902,641	642,167	183,413	133,823	20.8%	fresh; updated 2026-06-30T15:36:13+00:00
Sling	Open-source CLI-first data movement tool for database and file replication workflows.	103,135	81,285	102,799	81,045	336	240	0.3%	fresh; updated 2026-06-30T15:36:13+00:00

Customer Trust Center Snapshot

A customer-ready trust center export is generated with every benchmark refresh for sales, security review and procurement evidence packets.

Export	Value
Status	verified
Badge	dpone verified / 100
Markdown snapshot	docs/benchmarks/dpone-trust-center-snapshot-2026-06-12.md (open snapshot)
JSON snapshot	docs/benchmarks/data/dpone-trust-center-snapshot-2026-06-12.json (open JSON)
Badge asset	docs/benchmarks/assets/dpone-trust-center-badge.svg

Benchmark v3 Release Readiness

The benchmark is treated as a benchmark-v3 evidence product: stable metric groups keep contract compatibility, while certification, claims, budget and export layers provide release guardrails.

Release seal	Value
Status	release-ready
Seal	Benchmark v3 verified
Score	100/100
Generated at	2026-06-30T15:36:13+00:00
Source revision	codex/release-v0.62.1@3f562b42ebc8db96a14361ce93353486faa23af4

Evidence policy

• stable metric groups: loc_sloc, top_modules, coupling_cohesion, solid_clean_oop, coverage_confidence, industrial_maintainability, quality_gates, evidence_trust, public_evidence_integrity, source_verification, trust_center, runtime_certification, claims_ledger, quality_budgets, evidence_exports.
• experimental metric groups: feature_parity, governance_compliance, security_supply_chain, operational_reliability, operability_tco, architecture_taxonomy, complexity_boundary, semantic_maintainability, scoring_calibration, scale_readiness, refactor_roi, independent_validation, external_analyzer_results, candidate_quality_delta, trend_summary.
• Policy: Benchmark v3 keeps stable code-quality, release-certification and evidence-integrity metrics contract-compatible. Experimental posture, projection and roadmap metrics can evolve with explicit version notes.

Release checks

Check	Status	Evidence
Quality gates	passed	passed
Public evidence integrity	passed	verified, redactions 0
Source citation verification	passed	verified, source health 100/100
Evidence trust	passed	92/100 audit-ready
Customer trust center	passed	verified
Generated artifact manifest	passed	projects and run context present
Claims ledger	passed	verified 4, unverified 0
Runtime certification	passed	passed 4, failed 0
Quality budgets	passed	warning
Evidence warehouse exports	passed	10 CSV exports

Recommended action: Release the benchmark as v3 and use this evidence pack as the PR/release review summary.

Claims Ledger

Every public benchmark claim below is resolved against raw JSON evidence, generated artifacts, or public sources. Claims without evidence are not rendered as verified sales statements.

Verified 4, stale 0, unverified 0.

Claim	Type	Status	Confidence	Freshness	Gate impact	Evidence
dpone release benchmark gates are passing	release-readiness	verified	95	fresh	blocker	json:release_context.release_tag json:quality_gates.status
dpone production modules stay within the 400 SLOC release gate	architecture-quality	verified	95	fresh	blocker	json:projects[dpone].loc_without_tests.max_sloc json:quality_budgets.status
dpone nested lineage keeps root and parent identity evidence visible	runtime-certification	verified	95	fresh	blocker	json:runtime_certification_v2.scenarios[nested-lineage].status artifact:docs/nested-normalization.md artifact:tests/test_nested_normalization_contracts.py
dpone benchmark claims are backed by raw evidence and provenance artifacts	auditability	verified	95	fresh	warning	json:evidence_trust.overall_confidence_score json:source_verification.status artifact:docs/benchmarks/data/oss-code-quality-benchmark-2026-06-12.json

Runtime Certification Matrix

Runtime certification connects release claims to concrete checks and generated artifacts. Failed scenarios remain visible instead of being converted into optimistic narrative.

Passed 4, failed 0.

Scenario	Source	Strategy	Sink	Status	Checks	Artifacts
release_gate_certification	dpone	release_gate	benchmark evidence	passed	release tag resolved: passed quality gates passed: passed	n/a
python_api_payload_contract	dpone	python_api	raw evidence JSON	passed	schema v2: passed project identity: passed	n/a
nested_lineage_contract	nested objects	nested_normalization	lineage tables	passed	nested docs mention parent/root identity: passed nested contract tests exist: passed	docs/nested-normalization.md tests/test_nested_normalization_contracts.py
benchmark_artifact_contract	benchmark	artifact_generation	docs/benchmarks	passed	raw benchmark JSON: passed benchmark markdown: passed provenance JSON: passed	docs/benchmarks/data/oss-code-quality-benchmark-2026-06-12.json docs/benchmarks/oss-code-quality-benchmark-2026-06-12.md docs/benchmarks/data/oss-benchmark-provenance.json

Executable Certification

Executable certification runs deterministic, credential-free dpone release scenarios and publishes the ledger behind every runtime claim.

Passed 5, failed 0, stale 0, unavailable 0.

Scenario	Category	Runner	Status	Freshness	Duration	Row counts
artifact-contract	artifact_contract	cli	passed	fresh	696 ms	records 1
cdc-replay	cdc_replay	python_api	passed	fresh	0 ms	records 2
incremental	incremental_sync	python_api	passed	fresh	0 ms	records 2
nested-lineage	nested_lineage	python_api	passed	fresh	1 ms	orders 2 orders__customer 2 orders__items 3
schema-evolution	schema_evolution	python_api	passed	fresh	0 ms	records 3

Golden Dataset Evidence

Deterministic local fixtures validate nested lineage, incremental sync, CDC replay, schema evolution and artifact contracts.

Hash policy: SHA-256 over normalized JSON with volatile runtime timestamps removed..

Run Ledger

Machine-readable run artifacts: docs/benchmarks/data/runtime-certification/latest/run-ledger.json and docs/benchmarks/data/runtime-certification/latest/contract-checks.json.

Scenario	Status	Input hash	Output hash	Artifacts
artifact-contract	passed	147b6d07ff85	4979c567d6fe	docs/benchmarks/data/runtime-certification/latest/artifact-contract/artifact-contract.json docs/benchmarks/data/runtime-certification/latest/artifact-contract/artifact-contract.md
cdc-replay	passed	8371105c3cb6	496b00829f70	docs/benchmarks/data/runtime-certification/latest/cdc-replay/cdc-replay.json
incremental	passed	8f6d0c2760ba	f513dd4a4ee2	docs/benchmarks/data/runtime-certification/latest/incremental/incremental.json
nested-lineage	passed	4e16d90a56e7	6e4bd2041524	docs/benchmarks/data/runtime-certification/latest/nested-lineage/nested-lineage.json
schema-evolution	passed	f7a04a823194	f7a04a823194	docs/benchmarks/data/runtime-certification/latest/schema-evolution/schema-evolution.json

Certification Gates

Status: passed.

Gate	Status	Actual	Expected
Executable scenario artifact-contract	passed	passed/fresh	passed/fresh
Executable scenario cdc-replay	passed	passed/fresh	passed/fresh
Executable scenario incremental	passed	passed/fresh	passed/fresh
Executable scenario nested-lineage	passed	passed/fresh	passed/fresh
Executable scenario schema-evolution	passed	passed/fresh	passed/fresh

Quality Budget As Code

Budget policy: docs/benchmarks/quality_budgets.yml. Status: warning.

Passed 34, warning 14, failed 0.

Project	Metric	Value	Warning	Failure	Status
dpone	max_sloc	397	350	400	warning
Airbyte	max_sloc	28633	350	400	warning
Airbyte	max_loc	41035	450	600	warning
dlt	max_sloc	1631	350	400	warning
dlt	max_loc	2013	450	600	warning
dlt	avg_clustering	0.226	n/a	0.18	warning
Pentaho Kettle	max_sloc	7948	350	400	warning
Pentaho Kettle	max_loc	10532	450	600	warning
Pentaho Kettle	avg_clustering	0.276	n/a	0.18	warning
Apache Hop	max_sloc	4584	350	400	warning
Apache Hop	max_loc	5998	450	600	warning
Apache Hop	avg_clustering	0.235	n/a	0.18	warning
Sling	max_sloc	3379	350	400	warning
Sling	max_loc	4198	450	600	warning

Debt Ledger

Project	Debt	Status	Release handling
dpone	max_sloc = 397	warning	visible managed warning
Airbyte	max_sloc = 28633	warning	visible managed warning
Airbyte	max_loc = 41035	warning	visible managed warning
dlt	max_sloc = 1631	warning	visible managed warning
dlt	max_loc = 2013	warning	visible managed warning
dlt	avg_clustering = 0.226	warning	visible managed warning
Pentaho Kettle	max_sloc = 7948	warning	visible managed warning
Pentaho Kettle	max_loc = 10532	warning	visible managed warning
Pentaho Kettle	avg_clustering = 0.276	warning	visible managed warning
Apache Hop	max_sloc = 4584	warning	visible managed warning
Apache Hop	max_loc = 5998	warning	visible managed warning
Apache Hop	avg_clustering = 0.235	warning	visible managed warning
Sling	max_sloc = 3379	warning	visible managed warning
Sling	max_loc = 4198	warning	visible managed warning

Evidence Warehouse Export

The benchmark also emits BI-ready CSV facts so quality, freshness, gates and claims can be trended outside Markdown.

Output directory: docs/benchmarks/data/warehouse.

Export	Purpose
projects.csv	project-level size, freshness and release identity facts
metric_groups.csv	per-project freshness and stale-age facts
quality_gates.csv	normalized release gate results
claims.csv	public claim status and confidence facts
runtime_certification.csv	runtime certification scenario facts
certification_scenarios.csv	executable certification scenario facts
contract_checks.csv	per-scenario executable contract check facts
run_ledger.csv	operational run ledger facts with hashes and durations
release_deltas.csv	baseline comparison facts
debt_ledger.csv	quality-budget debt facts

Evidence Trust & Auditability

Evidence confidence separates raw measurements from derived scores and inferred market posture. The benchmark is built for self-service review: every refresh publishes a provenance ledger, artifact checksums and an optional LOC/SLOC cross-check result.

Overall evidence confidence: 92/100 (audit-ready).

Project	Confidence	Band	Fresh groups	Stale groups	Unavailable groups
dpone	100	audit-ready	5	0	0
Airbyte	95	audit-ready	5	0	0
dlt	95	audit-ready	5	0	0
Pentaho Kettle	95	audit-ready	5	0	0
Apache Hop	95	audit-ready	5	0	0
Sling	95	audit-ready	5	0	0

Measured vs derived vs inferred

Evidence mode	Metric groups	Meaning
measured	3	direct source-tree collection or static dependency analysis
derived	15	deterministic score calculated from measured evidence
inferred	3	public documentation or repository signal interpreted through a fixed rubric
closed-core note	1	closed-core comparator posture where source code is unavailable

Metric provenance ledger

Raw provenance is published at docs/benchmarks/data/oss-benchmark-provenance.json (open ledger).

Metric group	Mode	Collector	Formula
loc_sloc	measured	collect_project_metrics	loc-sloc-v1
top_modules	measured	top_files	top-modules-v1
coupling_cohesion	measured	compute_coupling_metrics	dependency-proxy-v1
solid_clean_oop	derived	score_quality	solid-clean-oop-rubric-v1
industrial_maintainability	derived	compute_industrial_maintainability_index	industrial-maintainability-v1
quality_gates	derived	evaluate_quality_gates	quality-gates-v1
feature_parity	inferred	build_feature_parity_matrix	feature-parity-v1
governance_compliance	inferred	build_governance_compliance_matrix	governance-compliance-v1
security_supply_chain	inferred	build_security_supply_chain_matrix	security-supply-chain-v1
refactor_roi	derived	build_refactor_roi_roadmap	refactor-roi-v1
semantic_maintainability	derived	analyze_semantic_maintainability	semantic-maintainability-v1
scoring_calibration	derived	build_scoring_calibration	scoring-calibration-v1

Reproducibility manifest

The provenance ledger records Python/platform metadata, analyzer schema versions and SHA-256 checksums for generated benchmark artifacts. This makes the public markdown, SVG assets and JSON evidence independently traceable to the same refresh run.

Control	Value
Checksum manifest	docs/benchmarks/data/oss-benchmark-provenance.json
Optional LOC/SLOC cross-check	fresh via tokei
Cross-check detail	external SLOC 395290, benchmark SLOC 295514, delta 99776

Public Evidence Integrity

This section verifies that public benchmark artifacts avoid machine-specific paths and that customer-facing claims have source-backed evidence.

Integrity check	Value
Status	verified
Score	100
Claim coverage	100%
redaction violations	0

claim evidence ledger

Claim	Section	Confidence	Source	Status
feature_parity_public_sources	Feature Parity Matrix	vendor-public	feature_parity.entries[].sources	covered
closed_core_comparator_scope	Comparable OSS corpus	vendor-public	closed_core_notes[].url	covered
customer_trust_center_verified	Customer Trust Center Snapshot	derived	trust_center.status	covered
quality_gates_passed	Quality Gates	derived	quality_gates.status	covered
external_analyzer_execution	Independent Analyzer Cross-Validation	measured	external_analyzer_results[]	covered
dpone_position_static_quality	dpone position	derived	projects[].quality, projects[].coupling, industrial_maintainability	covered

Public evidence policy: raw JSON, Markdown, SVG and PR artifacts use stable path tokens such as $WORKSPACE and $BENCHMARK_CACHE instead of local filesystem paths.

Source Citation Verification

This section verifies the source registry behind public benchmark claims. URL and local source references are checked before publication; source health and stale source values stay visible instead of being overwritten by a failed refresh.

Source health	Value
Status	verified
Source health score	100
Claim traceability	100%
Verified sources	48
Stale sources	0
Unavailable sources	0

claim-to-source matrix

Claim	Sources	Status
closed_core_comparator_scope	2	verified
customer_trust_center_verified	3	verified
feature:airbyte:cdc_incremental	2	verified
feature:airbyte:certification_evidence	1	verified
feature:airbyte:connectors	1	verified
feature:airbyte:deployment_modes	1	verified
feature:airbyte:governance_security	1	verified
feature:airbyte:lineage_catalog	1	verified
feature:airbyte:observability	1	verified
feature:airbyte:orchestration	1	verified
feature:airbyte:retry_resume	1	verified
feature:airbyte:schema_evolution	1	verified

Source registry

Source	Type	Status	Claims	Last updated	Mode
docs/appsflyer-rollout.md	local-doc	verified	2	2026-06-30T15:36:13+00:00	local-file
docs/cdc.md	local-doc	verified	3	2026-06-30T15:36:13+00:00	local-file
docs/certification-suite.md	local-doc	verified	2	2026-06-30T15:36:13+00:00	local-file
docs/ci-cd.md	local-doc	verified	3	2026-06-30T15:36:13+00:00	local-file
docs/connector-certification.md	local-doc	verified	2	2026-06-30T15:36:13+00:00	local-file
docs/connector-sdk.md	local-doc	verified	2	2026-06-30T15:36:13+00:00	local-file
docs/connectors.md	local-doc	verified	2	2026-06-30T15:36:13+00:00	local-file
docs/industrial-readiness.md	local-doc	verified	4	2026-06-30T15:36:13+00:00	local-file
docs/lineage.md	local-doc	verified	2	2026-06-30T15:36:13+00:00	local-file
docs/load-lineage.md	local-doc	verified	2	2026-06-30T15:36:13+00:00	local-file
docs/observability.md	local-doc	verified	2	2026-06-30T15:36:13+00:00	local-file
docs/orchestration.md	local-doc	verified	4	2026-06-30T15:36:13+00:00	local-file
docs/physical-ddl-apply.md	local-doc	verified	2	2026-06-30T15:36:13+00:00	local-file
docs/release-evidence.md	local-doc	verified	4	2026-06-30T15:36:13+00:00	local-file
docs/schema-evolution.md	local-doc	verified	2	2026-06-30T15:36:13+00:00	local-file
oss-code-quality-benchmark-2026-06-12.md	local-doc	verified	1	2026-06-30T15:36:13+00:00	local-file

Raw source verification evidence is stored under source_verification in docs/benchmarks/data/oss-code-quality-benchmark-2026-06-12.json.

Independent Analyzer Cross-Validation & Audit Pack

This audit layer makes the benchmark easier to trust: internal metrics remain the source of record, while external analyzer command metadata and cross-checks show where independent tools agree, warn, or are unavailable.

External analyzer execution: manual CI installs and runs tokei, cloc, radon, and lizard when available. If a refresh cannot execute a tool but prior evidence exists, stale analyzer values remain visible with their last successful update instead of being overwritten.

Validation confidence

Project	Confidence	Band	LOC/SLOC status	Complexity status	Stale analyzers	Unavailable analyzers
Airbyte	70	medium	failed	warning	0	0
Apache Hop	62	medium	failed	failed	0	0
dlt	62	medium	failed	failed	0	0
dpone	62	medium	failed	failed	0	0
Pentaho Kettle	62	medium	failed	failed	0	0
Sling	62	medium	failed	failed	0	0

Analyzer command ledger

Tool	Project	Status	Exit	Version	Command
tokei	dpone	fresh	0	n/a	tokei --exclude .cache --exclude .venv --exclude node_modules --exclude target --exclude dist --output json $WORKSPACE
cloc	dpone	fresh	0	n/a	cloc --json --exclude-dir=.git,.venv,.cache,node_modules,target,build,dist,__pycache__ $WORKSPACE
radon	dpone	fresh	0	n/a	radon cc -j $WORKSPACE
lizard	dpone	fresh	0	n/a	lizard --xml $WORKSPACE
tokei	airbyte	fresh	0	n/a	tokei --exclude .cache --exclude .venv --exclude node_modules --exclude target --exclude dist --output json $BENCHMARK_CACHE/airbyte
cloc	airbyte	fresh	0	n/a	cloc --json --exclude-dir=.git,.venv,.cache,node_modules,target,build,dist,__pycache__ $BENCHMARK_CACHE/airbyte
radon	airbyte	fresh	0	n/a	radon cc -j $BENCHMARK_CACHE/airbyte
lizard	airbyte	fresh	0	n/a	lizard --xml $BENCHMARK_CACHE/airbyte
tokei	dlt	fresh	0	n/a	tokei --exclude .cache --exclude .venv --exclude node_modules --exclude target --exclude dist --output json $BENCHMARK_CACHE/dlt
cloc	dlt	fresh	0	n/a	cloc --json --exclude-dir=.git,.venv,.cache,node_modules,target,build,dist,__pycache__ $BENCHMARK_CACHE/dlt
radon	dlt	fresh	0	n/a	radon cc -j $BENCHMARK_CACHE/dlt
lizard	dlt	fresh	0	n/a	lizard --xml $BENCHMARK_CACHE/dlt
tokei	pentaho-kettle	fresh	0	n/a	tokei --exclude .cache --exclude .venv --exclude node_modules --exclude target --exclude dist --output json $BENCHMARK_CACHE/pentaho-kettle
cloc	pentaho-kettle	fresh	0	n/a	cloc --json --exclude-dir=.git,.venv,.cache,node_modules,target,build,dist,__pycache__ $BENCHMARK_CACHE/pentaho-kettle
radon	pentaho-kettle	fresh	0	n/a	radon cc -j $BENCHMARK_CACHE/pentaho-kettle
lizard	pentaho-kettle	fresh	0	n/a	lizard --xml $BENCHMARK_CACHE/pentaho-kettle
tokei	apache-hop	fresh	0	n/a	tokei --exclude .cache --exclude .venv --exclude node_modules --exclude target --exclude dist --output json $BENCHMARK_CACHE/apache-hop
cloc	apache-hop	fresh	0	n/a	cloc --json --exclude-dir=.git,.venv,.cache,node_modules,target,build,dist,__pycache__ $BENCHMARK_CACHE/apache-hop
radon	apache-hop	fresh	0	n/a	radon cc -j $BENCHMARK_CACHE/apache-hop
lizard	apache-hop	fresh	0	n/a	lizard --xml $BENCHMARK_CACHE/apache-hop
tokei	sling	fresh	0	n/a	tokei --exclude .cache --exclude .venv --exclude node_modules --exclude target --exclude dist --output json $BENCHMARK_CACHE/sling
cloc	sling	fresh	0	n/a	cloc --json --exclude-dir=.git,.venv,.cache,node_modules,target,build,dist,__pycache__ $BENCHMARK_CACHE/sling
radon	sling	fresh	0	n/a	radon cc -j $BENCHMARK_CACHE/sling
lizard	sling	fresh	0	n/a	lizard --xml $BENCHMARK_CACHE/sling

LOC/SLOC cross-check

Project	Tool	Status	Benchmark SLOC	External SLOC	Delta
airbyte	tokei	failed	527,195	2,550,180	383.73%
airbyte	cloc	failed	527,195	3,103,945	488.77%
apache-hop	tokei	failed	775,990	961,255	23.87%
apache-hop	cloc	failed	775,990	1,466,752	89.02%
dlt	tokei	failed	235,504	367,973	56.25%
dlt	cloc	failed	235,504	378,758	60.83%
dpone	tokei	failed	295,514	395,290	33.76%
dpone	cloc	failed	295,514	6,747,123	2183.18%
pentaho-kettle	tokei	failed	887,667	1,181,940	33.15%
pentaho-kettle	cloc	failed	887,667	1,524,901	71.79%
sling	tokei	failed	81,285	154,484	90.05%
sling	cloc	failed	81,285	169,454	108.47%

Complexity cross-check

Project	Tool	Status	Avg complexity	Max complexity	Files
airbyte	radon	warning	2.44	40.00	1,798
airbyte	lizard	warning	1.81	50.00	25,409
apache-hop	radon	not_applicable	n/a	n/a	n/a
apache-hop	lizard	failed	2.37	127.00	44,280
dlt	radon	failed	3.60	92.00	1,037
dlt	lizard	failed	2.23	92.00	14,556
dpone	radon	failed	3.43	151.00	2,258
dpone	lizard	failed	2.75	58.00	19,412
pentaho-kettle	radon	not_applicable	n/a	n/a	n/a
pentaho-kettle	lizard	failed	2.13	423.00	64,801
sling	radon	passed	3.00	5.00	1
sling	lizard	failed	4.76	173.00	3,062

Feature Parity Matrix

This matrix compares public product-surface capabilities. It is evidence-bounded: closed-core tools are included as feature comparators, while source-code quality metrics remain limited to code-comparable repositories.

Tool	Feature score	Band	Code comparable?	Comparator note
dpone	94	leader	yes	local framework and feature reference
Airbyte	74	strong	yes	open-source code and public docs
dlt	43	limited	yes	open-source library and public docs
Pentaho Kettle	52	focused	yes	open-source lineage plus current Pentaho docs
Apache Hop	54	focused	yes	open-source platform and public docs
Sling	42	limited	yes	open-source CLI and public docs
Fivetran	88	leader	no	closed-core feature comparator
Informatica	93	leader	no	closed-core feature comparator

Capability coverage

Capability	dpone	Airbyte	dlt	Pentaho Kettle	Apache Hop	Sling	Fivetran	Informatica
Connector breadth and SDK	supported	strong	supported	strong	strong	strong	managed	managed
CDC and incremental capture	native	native	partial	partial	partial	partial	managed	managed
Schema evolution and drift	native	native	native	partial	partial	partial	managed	managed
Orchestration and scheduling	native	supported	external	native	native	external	managed	managed
Retry, resume, and recovery	native	supported	partial	partial	partial	partial	managed	managed
Observability and run evidence	native	supported	partial	supported	native	partial	managed	managed
Lineage and catalog	native	external	external	partial	partial	external	partial	managed
Governance, security, and secrets	native	supported	external	supported	partial	external	managed	managed
Deployment modes	supported	strong	supported	supported	strong	strong	strong	strong
Certification evidence	native	partial	not detected	not detected	not detected	not detected	partial	partial

Feature evidence

• dpone: cdc_incremental native (1); certification_evidence native (2); governance_security native (3).
• Airbyte: cdc_incremental native (1); connectors strong (2); deployment_modes strong (3).
• dlt: schema_evolution native (1); connectors supported (2); deployment_modes supported (3).
• Pentaho Kettle: connectors strong (1); orchestration native (2); deployment_modes supported (3).
• Apache Hop: connectors strong (1); deployment_modes strong (2); observability native (3).
• Sling: connectors strong (1); deployment_modes strong (2); cdc_incremental partial (3).
• Fivetran: cdc_incremental managed (1); connectors managed (2); deployment_modes strong (3).
• Informatica: cdc_incremental managed (1); connectors managed (2); deployment_modes strong (3).

Feature source index

• docs/cdc.md
• docs/certification-suite.md
• https://docs.airbyte.com/platform/understanding-airbyte/cdc
• https://dlthub.com/docs/general-usage/schema-evolution
• https://docs.pentaho.com/pdia-data-integration/pipeline-designer/working-with-transformations
• https://hop.apache.org/
• https://fivetran.com/docs/core-concepts/features
• https://www.informatica.com/products/data-governance/cloud-data-governance-and-catalog.html
• docs/connectors.md
• docs/connector-sdk.md
• docs/orchestration.md
• docs/release-evidence.md

Feature parity sources are stored in raw evidence under feature_parity.entries[].sources.

Governance & Compliance

This layer scores auditability, lineage catalog coverage, data contracts, schema governance, policy gates, evidence chain, access and secrets posture, release certification, compliance runbooks, and data quality reconciliation. Closed-core vendors are included as managed governance posture comparators.

Tool	Governance score	Band	Evidence mode	Strong controls	Managed controls	Comparator note
dpone	100	leader	repo-evidence	10	0	repo-evidence governance posture
Airbyte	33	limited	public-doc	0	0	OSS/public-doc governance posture
dlt	37	limited	public-doc	0	0	OSS/public-doc governance posture
Pentaho Kettle	19	limited	public-doc	0	0	legacy OSS/public-doc governance posture
Apache Hop	26	limited	public-doc	0	0	OSS/public-doc governance posture
Sling	21	limited	public-doc	0	0	OSS/public-doc governance posture
Fivetran	68	governed	public-doc	0	7	managed governance posture; source controls are closed-core
Informatica	82	strong	public-doc	0	9	managed governance posture; source controls are closed-core

Governance control matrix

Control	dpone	Airbyte	dlt	Pentaho Kettle	Apache Hop	Sling	Fivetran	Informatica
Auditability	strong	documented	partial	partial	partial	partial	managed	managed
Lineage / catalog	strong	partial	partial	partial	documented	not detected	managed	managed
Data contracts	strong	partial	documented	not detected	not detected	partial	managed	managed
Schema governance	strong	documented	documented	partial	partial	partial	managed	managed
Policy gates	strong	partial	partial	not detected	partial	not detected	managed	managed
Evidence chain	strong	not detected	not detected	not detected	not detected	not detected	opaque	managed
Access and secrets	strong	not detected	not detected	not detected	not detected	partial	managed	managed
Release certification	strong	not detected	not detected	not detected	not detected	not detected	opaque	managed
Compliance runbooks	strong	documented	documented	documented	documented	documented	documented	documented
Data quality reconciliation	strong	partial	documented	partial	partial	partial	managed	managed

Governance evidence

• dpone: access_secrets strong (docs/supply-chain.md); auditability strong (docs/unified-run-evidence.md); compliance_runbooks strong (docs/live-certification.md); data_contracts strong (docs/schema-contracts.md).
• Airbyte: auditability documented (source); compliance_runbooks documented (source); schema_governance documented (source); data_contracts partial (source).
• dlt: compliance_runbooks documented (source); data_contracts documented (source); data_quality_reconciliation documented (source); schema_governance documented (source).
• Pentaho Kettle: compliance_runbooks documented (source); auditability partial (source); data_quality_reconciliation partial (source); lineage_catalog partial (source).
• Apache Hop: compliance_runbooks documented (source); lineage_catalog documented (source); auditability partial (source); data_quality_reconciliation partial (source).
• Sling: compliance_runbooks documented (source); access_secrets partial (source); auditability partial (source); data_contracts partial (source).
• Fivetran: access_secrets managed (source); auditability managed (source); data_contracts managed (source); data_quality_reconciliation managed (source).
• Informatica: access_secrets managed (source); auditability managed (source); data_contracts managed (source); data_quality_reconciliation managed (source).

Managed governance posture note: Fivetran and Informatica publish governance controls, audit material and enterprise operating models, but their closed-core implementation details cannot be code-scored with the same static benchmark.

Security & Supply Chain

This layer checks repository-local security and supply-chain controls that matter for industrial adoption: vulnerability scanning, dependency response, reproducible builds, SBOM inventory, security policy and release provenance. Closed-core vendors are listed as posture notes, not code-scored source benchmarks.

Tool	Security score	Band	Present controls	Missing controls	Comparator note
dpone	100	excellent	10	0	local-framework
Airbyte	36	risk	4	6	oss-core
dlt	27	risk	3	7	oss-core
Pentaho Kettle	14	risk	1	8	oss-core
Apache Hop	23	risk	2	7	oss-core
Sling	9	risk	1	9	oss-core
Fivetran	n/a	not code-scored	n/a	n/a	closed-core posture note; source controls cannot be scanned
Informatica	n/a	not code-scored	n/a	n/a	closed-core posture note; source controls cannot be scanned

Security control matrix

Control	dpone	Airbyte	dlt	Pentaho Kettle	Apache Hop	Sling	Fivetran	Informatica
License declared	present	present	present	present	present	present	n/a	n/a
Secret scanning	present	not detected	not detected	not detected	not detected	not detected	n/a	n/a
CodeQL / SAST	present	not detected	not detected	not detected	not detected	not detected	n/a	n/a
OSSF Scorecard	present	not detected	not detected	not detected	not detected	not detected	n/a	n/a
Dependency update automation	present	present	not detected	not detected	not detected	not detected	n/a	n/a
Lockfile reproducibility	present	present	present	partial	partial	not detected	n/a	n/a
SBOM inventory	present	not detected	not detected	not detected	not detected	not detected	n/a	n/a
Security policy	present	not detected	not detected	not detected	not detected	not detected	n/a	n/a
Least-privilege CI permissions	present	present	present	not detected	present	not detected	n/a	n/a
Release provenance	present	not detected	not detected	not detected	not detected	not detected	n/a	n/a

Security evidence

• dpone: dependency_updates present (.github/dependabot.yml); least_privilege_permissions present (.github/workflows/certification-release-summary.yml); license_declared present (LICENSE); lockfile_reproducibility present (uv.lock).
• Airbyte: dependency_updates present (.github/dependabot.yml); least_privilege_permissions present (.github/workflows/agent-sdk-docs-generate.yml); license_declared present (LICENSE); lockfile_reproducibility present (poetry.lock).
• dlt: least_privilege_permissions present (.github/workflows/fork_tests_with_secrets.yml); license_declared present (pyproject.toml); lockfile_reproducibility present (uv.lock); dependency_updates not_detected (no source).
• Pentaho Kettle: license_declared present (pom.xml); lockfile_reproducibility partial (pom.xml); dependency_updates not_detected (no source); least_privilege_permissions not_detected (no source).
• Apache Hop: least_privilege_permissions present (.github/workflows/issue_tagger.yml); license_declared present (LICENSE); lockfile_reproducibility partial (pom.xml); dependency_updates not_detected (no source).
• Sling: license_declared present (LICENSE); dependency_updates not_detected (no source); least_privilege_permissions not_detected (no source); lockfile_reproducibility not_detected (no source).
• Fivetran: dependency_updates unavailable (source); least_privilege_permissions unavailable (source); license_declared unavailable (source); lockfile_reproducibility unavailable (source).
• Informatica: dependency_updates unavailable (source); least_privilege_permissions unavailable (source); license_declared unavailable (source); lockfile_reproducibility unavailable (source).

Closed-core posture note: Fivetran and Informatica publish security/trust material, but their managed platform source supply-chain controls cannot be measured with the same static repository benchmark.

Security supply-chain evidence is stored in raw JSON under security_supply_chain.entries[].

Operational Reliability

This layer compares runtime trust signals: retry/resume, checkpoint safety, zero duplicate retry behavior, reconciliation, CDC recovery, observability, SLOs, schema drift and release evidence. dpone uses measured JSON proof where available; external tools use public documentation posture.

Tool	Reliability score	Band	Evidence mode	Measured controls	Documented controls	Comparator note
dpone	80	strong	measured	4	6	measured local evidence
Airbyte	51	watch	public-doc	0	5	public-doc posture and OSS source
dlt	28	limited	public-doc	0	3	public-doc posture and OSS source
Pentaho Kettle	17	limited	public-doc	0	0	public-doc posture and OSS source
Apache Hop	20	limited	public-doc	0	0	public-doc posture and OSS source
Sling	25	limited	public-doc	0	0	public-doc posture and OSS source
Fivetran	59	watch	public-doc	0	8	managed closed-core public-doc posture
Informatica	61	watch	public-doc	0	9	managed closed-core public-doc posture

Reliability control matrix

Control	dpone	Airbyte	dlt	Pentaho Kettle	Apache Hop	Sling	Fivetran	Informatica
Retry / resume	documented	documented	documented	partial	partial	partial	documented	documented
Checkpoint safety	documented	documented	documented	partial	partial	partial	documented	documented
Idempotency	documented	partial	partial	not detected	not detected	partial	documented	documented
Fault injection	documented	partial	not detected	not detected	not detected	not detected	not detected	not detected
Data reconciliation	measured	partial	not detected	partial	partial	partial	documented	documented
CDC recovery	measured	documented	not detected	not detected	not detected	partial	documented	documented
Observability evidence	documented	documented	partial	partial	partial	partial	documented	documented
Performance SLO	measured	partial	not detected	not detected	not detected	not detected	documented	documented
Schema drift	documented	documented	documented	partial	partial	partial	documented	documented
Release evidence	measured	partial	not detected	not detected	partial	not detected	partial	documented

Reliability evidence

• dpone: cdc_recovery measured (test_artifacts/live_certification_local_run/live-state-reconciliation/live_state_reconciliation.json); data_reconciliation measured (test_artifacts/live_certification_local_run/live-state-reconciliation/live_state_reconciliation.json); performance_slo measured (test_artifacts/live_certification_local_run/benchmark-slo/benchmark_slo_gate.json); release_evidence measured (test_artifacts/live_certification_local_run/release-evidence/release_evidence_pack.json).
• Airbyte: cdc_recovery documented (source); checkpoint_safety documented (source); observability_evidence documented (source); retry_resume documented (source).
• dlt: checkpoint_safety documented (source); retry_resume documented (source); schema_drift documented (source); idempotency partial (source).
• Pentaho Kettle: checkpoint_safety partial (source); data_reconciliation partial (source); observability_evidence partial (source); retry_resume partial (source).
• Apache Hop: checkpoint_safety partial (source); data_reconciliation partial (source); observability_evidence partial (source); release_evidence partial (source).
• Sling: cdc_recovery partial (source); checkpoint_safety partial (source); data_reconciliation partial (source); idempotency partial (source).
• Fivetran: cdc_recovery documented (source); checkpoint_safety documented (source); data_reconciliation documented (source); idempotency documented (source).
• Informatica: cdc_recovery documented (source); checkpoint_safety documented (source); data_reconciliation documented (source); idempotency documented (source).

Reliability scoring is evidence-bounded: measured requires local machine-readable proof; documented is public or local documentation; partial is a weaker posture signal. The strongest dpone differentiator is measured zero duplicate retry and recovery evidence.

TCO & Operability

This layer scores operational surface area rather than commercial pricing. It highlights deployment footprint, infrastructure prerequisites, configuration and secrets complexity, self-service runbooks, CI/CD, observability, upgrade posture, operator toil and vendor lock-in transparency.

Tool	Operability score	Band	Evidence mode	Strong controls	Managed controls	Drag controls	Comparator note
dpone	100	excellent	repo-evidence	10	0	0	repo-evidence posture
Airbyte	61	watch	public-doc	2	0	3	OSS/self-managed platform posture
dlt	76	strong	public-doc	4	0	2	Python library posture
Pentaho Kettle	35	drag	public-doc	0	0	8	legacy OSS platform posture
Apache Hop	60	watch	public-doc	2	0	3	OSS platform posture
Sling	76	strong	public-doc	4	0	2	CLI-first OSS posture
Fivetran	80	strong	public-doc	1	8	1	managed platform trade-off
Informatica	61	watch	public-doc	1	1	3	managed enterprise platform trade-off

Operability control matrix

Control	dpone	Airbyte	dlt	Pentaho Kettle	Apache Hop	Sling	Fivetran	Informatica
Deployment footprint	strong	partial	strong	partial	moderate	strong	managed	moderate
Infrastructure prerequisites	strong	partial	strong	partial	moderate	strong	managed	moderate
Configuration surface	strong	moderate	moderate	partial	moderate	moderate	managed	partial
Secrets operations	strong	moderate	partial	not detected	not detected	partial	managed	moderate
Self-service docs	strong	strong	strong	moderate	strong	strong	strong	strong
CI/CD automation	strong	moderate	moderate	not detected	not detected	moderate	managed	moderate
Observability operations	strong	moderate	partial	partial	moderate	partial	managed	managed
Upgrade / rollback posture	strong	moderate	moderate	partial	partial	moderate	managed	moderate
Operator toil	strong	partial	moderate	partial	moderate	moderate	managed	partial
Vendor lock-in transparency	strong	strong	strong	moderate	strong	strong	opaque	opaque

Operability evidence

• dpone: ci_cd_automation strong (.github/workflows/ci.yml); configuration_surface strong (docs/ops-cli.md); deployment_footprint strong (src/dpone/ops/deploy_profiles.py); infra_prerequisites strong (pyproject.toml).
• Airbyte: lock_in_transparency strong (source); self_service_docs strong (source); ci_cd_automation moderate (source); configuration_surface moderate (source).
• dlt: deployment_footprint strong (source); infra_prerequisites strong (source); lock_in_transparency strong (source); self_service_docs strong (source).
• Pentaho Kettle: lock_in_transparency moderate (source); self_service_docs moderate (source); configuration_surface partial (source); deployment_footprint partial (source).
• Apache Hop: lock_in_transparency strong (source); self_service_docs strong (source); configuration_surface moderate (source); deployment_footprint moderate (source).
• Sling: deployment_footprint strong (source); infra_prerequisites strong (source); lock_in_transparency strong (source); self_service_docs strong (source).
• Fivetran: self_service_docs strong (source); ci_cd_automation managed (source); configuration_surface managed (source); deployment_footprint managed (source).
• Informatica: self_service_docs strong (source); observability_ops managed (source); ci_cd_automation moderate (source); deployment_footprint moderate (source).

Managed SaaS can reduce operator toil, but it also moves cost visibility, upgrade control and vendor lock-in into the contract. The benchmark therefore treats Fivetran and Informatica as managed platform trade-off comparators, not source-code peers.

Industrial Maintainability Index

The Industrial Maintainability Index is a 0-100 executive KPI layered over the raw evidence. It combines SOLID/Clean OOP score, largest production module size, import coupling, cohesion/clustering, static test footprint, and data freshness. Raw metric tables remain below for auditability.

Project	Index	Band	Delta	Quality	Module size	Coupling	Cohesion	Test footprint	Freshness
dpone	100	excellent	0	35.0	20.0	15.0	15.0	10.0	5.0
Airbyte	73	strong	0	28.7	0.0	15.0	15.0	9.4	5.0
dlt	66	watch	0	28.7	0.0	15.0	7.6	10.0	5.0
Pentaho Kettle	36	risk	0	8.8	0.0	9.1	4.4	8.4	5.0
Apache Hop	42	risk	0	16.4	0.0	10.7	4.1	6.0	5.0
Sling	46	risk	0	20.3	0.0	15.0	6.0	0.1	5.0

Release Delta

Release delta compares current merged evidence with the selected baseline. Stale comparisons are excluded from improvement claims and rendered as not comparable.

Metric	Previous	Current	Delta	Classification
industrial maintainability	n/a	100	0	unchanged
solid	n/a	5	0	unchanged
clean oop	n/a	5	0	unchanged
cohesion	n/a	0.633	0	unchanged
evidence confidence	n/a	0	0	unchanged
max module sloc	n/a	397	0	unchanged
max module loc	n/a	449	0	unchanged
max fan out	n/a	26	0	unchanged
avg clustering	n/a	0.157	0	unchanged
architecture risk	n/a	16	0	unchanged

Blocking release regressions: 0.

Quality Gates

Quality gates turn the benchmark into a governance control for dpone. They are evaluated from the merged evidence payload after stale preservation, so CI blocks regressions without erasing previous comparator data.

Current gate status: passed.

Gate	Actual	Target	Status	Severity
Project evidence available	available	== available	passed	blocker
Industrial Maintainability Index	100	>= 85	passed	blocker
Architecture risk score	16	<= 24	passed	blocker
Coverage confidence score	100	>= 75	passed	blocker
Largest production module LOC	449	<= 600	passed	blocker
Largest production module SLOC	397	<= 400	passed	blocker
Maximum fan-out	26	<= 30	passed	blocker
Cohesion ratio	0.633	>= 0.55	passed	blocker
Metric freshness	fresh	== fresh	passed	blocker
Average clustering	0.157	<= 0.18	passed	blocker
Release context resolved	resolved	== resolved	passed	blocker
Quality budget hard failures	passed	== passed	passed	blocker
Executable certification	passed	== passed	passed	blocker

The manual CI workflow also writes a PR benchmark summary at test_artifacts/oss-code-quality-benchmark/pr-comment.md, so reviewers can see gate status, score movement, freshness, and dpone hotspots without opening the full report.

Explainable scoring

This section makes the executive score auditable. Each Industrial Maintainability Index is the sum of bounded component scores; the raw component inputs remain in the JSON evidence.

dpone scoring

Formula: quality + module_size + coupling + cohesion + test_footprint + freshness -> 100 (excellent).

Component	Score	Max	Actual	Reason
SOLID and Clean OOP	35.0	35	SOLID 5.0/5, Clean OOP 5.0/5	largest module stays within the 600 LOC target (449); average fan-out is controlled (2.08)
Module size	20.0	20	449 LOC max module	Rewards production modules below the 600 LOC governance target.
Coupling	15.0	15	avg Ce 2.08, P90 Ce 5	Rewards low average and P90 outgoing dependency pressure.
Cohesion	15.0	15	cohesion 0.633, clustering 0.157	Rewards dependencies that stay inside architectural slices and avoid dense clustering.
Test footprint	10.0	10	51.0%	Rewards a meaningful static test footprint without treating it as runtime coverage.
Metric freshness	5.0	5	fresh	Rewards metric groups that refreshed successfully in the latest benchmark run.

Rubric evidence: SOLID 5.0/5, Clean OOP 5.0/5.

Airbyte scoring

Formula: quality + module_size + coupling + cohesion + test_footprint + freshness -> 73 (strong).

Component	Score	Max	Actual	Reason
SOLID and Clean OOP	28.7	35	SOLID 4.2/5, Clean OOP 4.0/5	largest module is very large (41035 LOC); average fan-out is controlled (1.82)
Module size	0.0	20	41035 LOC max module	Rewards production modules below the 600 LOC governance target.
Coupling	15.0	15	avg Ce 1.82, P90 Ce 6	Rewards low average and P90 outgoing dependency pressure.
Cohesion	15.0	15	cohesion 0.604, clustering 0.125	Rewards dependencies that stay inside architectural slices and avoid dense clustering.
Test footprint	9.4	10	136.7%	Rewards a meaningful static test footprint without treating it as runtime coverage.
Metric freshness	5.0	5	fresh	Rewards metric groups that refreshed successfully in the latest benchmark run.

Rubric evidence: SOLID 4.2/5, Clean OOP 4.0/5.

dlt scoring

Formula: quality + module_size + coupling + cohesion + test_footprint + freshness -> 66 (watch).

Component	Score	Max	Actual	Reason
SOLID and Clean OOP	28.7	35	SOLID 4.2/5, Clean OOP 4.0/5	largest module is very large (2013 LOC); average fan-out is controlled (4.69)
Module size	0.0	20	2013 LOC max module	Rewards production modules below the 600 LOC governance target.
Coupling	15.0	15	avg Ce 4.69, P90 Ce 12	Rewards low average and P90 outgoing dependency pressure.
Cohesion	7.6	15	cohesion 0.377, clustering 0.226	Rewards dependencies that stay inside architectural slices and avoid dense clustering.
Test footprint	10.0	10	116.4%	Rewards a meaningful static test footprint without treating it as runtime coverage.
Metric freshness	5.0	5	fresh	Rewards metric groups that refreshed successfully in the latest benchmark run.

Rubric evidence: SOLID 4.2/5, Clean OOP 4.0/5.

Pentaho Kettle scoring

Formula: quality + module_size + coupling + cohesion + test_footprint + freshness -> 36 (risk).

Component	Score	Max	Actual	Reason
SOLID and Clean OOP	8.8	35	SOLID 1.4/5, Clean OOP 1.1/5	largest module is very large (10532 LOC); P90 module size is high (655 LOC)
Module size	0.0	20	10532 LOC max module	Rewards production modules below the 600 LOC governance target.
Coupling	9.1	15	avg Ce 8.18, P90 Ce 23	Rewards low average and P90 outgoing dependency pressure.
Cohesion	4.4	15	cohesion 0.319, clustering 0.276	Rewards dependencies that stay inside architectural slices and avoid dense clustering.
Test footprint	8.4	10	29.3%	Rewards a meaningful static test footprint without treating it as runtime coverage.
Metric freshness	5.0	5	fresh	Rewards metric groups that refreshed successfully in the latest benchmark run.

Rubric evidence: SOLID 1.4/5, Clean OOP 1.1/5.

Apache Hop scoring

Formula: quality + module_size + coupling + cohesion + test_footprint + freshness -> 42 (risk).

Component	Score	Max	Actual	Reason
SOLID and Clean OOP	16.4	35	SOLID 2.1/5, Clean OOP 2.6/5	largest module is very large (5998 LOC); P90 fan-out is high (19)
Module size	0.0	20	5998 LOC max module	Rewards production modules below the 600 LOC governance target.
Coupling	10.7	15	avg Ce 7.98, P90 Ce 19	Rewards low average and P90 outgoing dependency pressure.
Cohesion	4.1	15	cohesion 0.188, clustering 0.235	Rewards dependencies that stay inside architectural slices and avoid dense clustering.
Test footprint	6.0	10	20.8%	Rewards a meaningful static test footprint without treating it as runtime coverage.
Metric freshness	5.0	5	fresh	Rewards metric groups that refreshed successfully in the latest benchmark run.

Rubric evidence: SOLID 2.1/5, Clean OOP 2.6/5.

Sling scoring

Formula: quality + module_size + coupling + cohesion + test_footprint + freshness -> 46 (risk).

Component	Score	Max	Actual	Reason
SOLID and Clean OOP	20.3	35	SOLID 3.1/5, Clean OOP 2.7/5	largest module is very large (4198 LOC); P90 module size is high (1554 LOC)
Module size	0.0	20	4198 LOC max module	Rewards production modules below the 600 LOC governance target.
Coupling	15.0	15	avg Ce 0.00, P90 Ce 0	Rewards low average and P90 outgoing dependency pressure.
Cohesion	6.0	15	cohesion 0.000, clustering 0.000	Rewards dependencies that stay inside architectural slices and avoid dense clustering.
Test footprint	0.1	10	0.3%	Rewards a meaningful static test footprint without treating it as runtime coverage.
Metric freshness	5.0	5	fresh	Rewards metric groups that refreshed successfully in the latest benchmark run.

Rubric evidence: SOLID 3.1/5, Clean OOP 2.7/5.

Regression summary

The regression summary compares dpone against the previous evidence file used for the refresh. It is optimized for CI review: lower module size, lower fan-out, lower cross-slice ratio, higher test footprint and fresh metrics are treated as better.

Current status: unchanged.

Metric	Previous	Current	Delta	Direction	Status
Industrial Maintainability Index	100	100	0	higher_is_better	unchanged
Largest production module LOC	449	449	0	lower_is_better	unchanged
P90 fan-out	5	5	0	lower_is_better	unchanged
Cross-slice dependency ratio	0.367	0.367	0	lower_is_better	unchanged
Static test footprint	0.51	0.51	0	higher_is_better	unchanged
Metric freshness	fresh	fresh	0	fresh_is_better	unchanged

Candidate quality delta

This PR-oriented view compares the current dpone benchmark evidence with the selected baseline evidence. It keeps SOLID/Clean Code budgets explicit: no hidden god modules, no silent fan-out growth, and no unlabelled test-footprint erosion.

Current status: passed.

Baseline evidence: 2026-06-30T15:30:34+00:00@3f562b42ebc8db96a14361ce93353486faa23af4.

Budget	Actual	Target	Status
Largest production module LOC	449	<= 600	passed
P90 fan-out	5	<= 12	passed
Maximum fan-out	26	<= 30	passed
Cohesion ratio	0.633	>= 0.55	passed
Static test footprint	0.51	>= 0.49	passed

The watchlist includes changed modules plus unchanged production modules that already sit above the watch threshold.

Module	Change	LOC delta	SLOC delta	Fan-out delta	Risk
src/dpone/commands/ops_parsers_artifacts.py	unchanged	0	0	0	watch
src/dpone/commands/schema_contract_cmd.py	unchanged	0	0	0	watch
src/dpone/commands/schema_migration_bundle_cmd.py	unchanged	0	0	0	watch
src/dpone/commands/schema_migration_registry_cmd.py	unchanged	0	0	0	watch
src/dpone/commands/schema_plan_cmd.py	unchanged	0	0	0	watch
src/dpone/integration_matrix_models.py	unchanged	0	0	0	watch
src/dpone/readiness/nested_certification.py	unchanged	0	0	0	watch
src/dpone/readiness/schema_migration_bundle_policy.py	unchanged	0	0	0	watch
src/dpone/runtime/cdc/retention_models.py	unchanged	0	0	0	watch
src/dpone/runtime/connectors/api/connector.py	unchanged	0	0	0	watch

Remediation backlog

The backlog translates benchmark evidence into engineering work. It is generated from quality gates, architecture hotspots, stale metric groups and dpone watch thresholds so the benchmark remains actionable.

Priority	Project	Category	Evidence	Recommendation
P2	dpone	fan_out	26 Ce; severity medium	Split responsibilities behind narrow contracts and keep public facades as compatibility shims.
P2	dpone	fan_in	69 Ca; severity medium	Split responsibilities behind narrow contracts and keep public facades as compatibility shims.
P2	dpone	fan_out_watch	Ce 26	Introduce narrower ports or policy objects so this module depends on contracts rather than concrete peers.
P3	dpone	module_size_watch	449 LOC	Move the next new responsibility into a focused collaborator before this module crosses 600 LOC.

Trend history

Trend data is stored in docs/benchmarks/data/oss-code-quality-benchmark-history.json (open history JSON).

Project	Index delta	Max Ce delta	P90 Ce delta	Largest LOC delta	Test footprint delta	Band movement
Airbyte	0	0	0	0	0	strong -> strong
Apache Hop	0	0	0	0	0	risk -> risk
dlt	0	0	0	0	0	watch -> watch
dpone	0	0	0	0	0	excellent -> excellent
Pentaho Kettle	0	0	0	0	0	risk -> risk
Sling	0	0	0	0	0	risk -> risk

Architecture delta

This view compares dpone architecture governance metrics against the previous benchmark evidence. It is optimized for PR review: lower fan-out and smaller hotspots are improvements, while test footprint is expected to move upward or stay stable.

Metric	Previous	Current	Delta	Status
Max fan-out	26.000 dpone.runtime.sources.strategies.mssql.mssql_queryout_artifacts	26.000 dpone.runtime.sources.strategies.mssql.mssql_queryout_artifacts	0	unchanged
P90 fan-out	5.000	5.000	0	unchanged
Average fan-out	2.076	2.076	0	unchanged
Largest module LOC	449.000	449.000	0	unchanged
Static test footprint	0.510	0.510	0	unchanged

Complexity & Boundary Discipline

Enterprise change risk falls when decision paths stay small, boundaries stay explicit, and runtime code depends on thin contracts instead of concrete implementations. This section turns those Clean Code, SOLID, DRY, KISS and DI signals into reviewable benchmark evidence.

Project	Overall	Status	Complexity	Boundary	DI	Max complexity	P90 complexity	Violations	Risks
Airbyte	67	watch	26	100	100	154	14	0	8
Apache Hop	57	risk	5	100	100	1,135	55	0	8
dlt	36	risk	51	0	65	143	9	31	8
dpone	59	risk	55	60	65	77	8	4	8
Pentaho Kettle	57	risk	5	100	100	1,508	63	0	8
Sling	57	risk	5	100	100	858	270	0	8

Complexity hotspots

Project	Module	Unit	Complexity
Airbyte	airbyte-integrations/connectors/source-mssql/src/main/kotlin/io/airbyte/integrations/source/mssql/MsSqlServerDebeziumOperations.kt	module	154
Airbyte	airbyte-integrations/connectors/source-postgres/src/main/kotlin/io/airbyte/integrations/source/postgres/cdc/PostgresCustomConverter.kt	module	143
Airbyte	airbyte-integrations/connectors/source-mysql/src/main/kotlin/io/airbyte/integrations/source/mysql/MySqlSourceJdbcPartitionFactory.kt	module	136
Airbyte	airbyte-cdk/bulk/toolkits/legacy-task-loader/src/main/kotlin/io/airbyte/cdk/load/message/DestinationMessage.kt	module	123
Airbyte	airbyte-integrations/connectors/source-mssql/src/main/kotlin/io/airbyte/integrations/source/mssql/MsSqlServerJdbcPartition.kt	module	123
Apache Hop	core/src/main/java/org/apache/hop/core/row/value/ValueMetaBase.java	module	1,135
Apache Hop	ui/src/main/java/org/apache/hop/ui/hopgui/file/pipeline/HopGuiPipelineGraph.java	module	814
Apache Hop	core/src/main/java/org/apache/hop/core/database/Database.java	module	789
Apache Hop	ui/src/main/java/org/apache/hop/ui/hopgui/file/workflow/HopGuiWorkflowGraph.java	module	643
Apache Hop	ui/src/main/java/org/apache/hop/ui/hopgui/perspective/explorer/ExplorerPerspective.java	module	615
dlt	docs/website/plugins/llms-txt.js	module	143
dlt	docs/website/scripts/verify-llms-txt.js	module	116
dlt	dlt/_workspace/cli/_pipeline_command.py	pipeline_command	80
dlt	dlt/_workspace/cli/_init_command.py	init_pipeline_at_destination	57
dlt	dlt/destinations/impl/databricks/databricks.py	_get_table_update_sql	47
dpone	src/dpone/commands/dag/list_edges_cmd.py	cmd_dag_list_edges	77
dpone	src/dpone/cli_render/manifest/explain.py	render_manifest_explain_text	58
dpone	src/dpone/dag/load_config_builder.py	build	56
dpone	src/dpone/manifest/validation_rules.py	_validate_process	53
dpone	src/dpone/runtime/etl_logging/clickhouse_validation.py	validate_clickhouse_rows	46
Pentaho Kettle	ui/src/main/java/org/pentaho/di/ui/spoon/Spoon.java	module	1,508
Pentaho Kettle	core/src/main/java/org/pentaho/di/core/row/value/ValueMetaBase.java	module	1,132
Pentaho Kettle	engine/src/main/java/org/pentaho/di/trans/TransMeta.java	module	1,031
Pentaho Kettle	core/src/main/java/org/pentaho/di/core/database/Database.java	module	946
Pentaho Kettle	engine/src/main/java/org/pentaho/di/trans/Trans.java	module	876
Sling	core/dbio/database/database.go	module	858
Sling	core/dbio/iop/datatype.go	module	615
Sling	core/dbio/iop/datastream.go	module	593
Sling	core/sling/config.go	module	559
Sling	core/sling/replication.go	module	518

Boundary violations

Project	Severity	Kind	Module	Message
dlt	warning	direct_implementation_import	dlt/destinations/_adbc_jobs.py	Concrete implementation import bypasses a thin port or factory contract.
dlt	warning	direct_implementation_import	dlt/destinations/impl/athena/athena.py	Concrete implementation import bypasses a thin port or factory contract.
dlt	warning	direct_implementation_import	dlt/destinations/impl/athena/athena.py	Concrete implementation import bypasses a thin port or factory contract.
dlt	warning	direct_implementation_import	dlt/destinations/impl/bigquery/bigquery.py	Concrete implementation import bypasses a thin port or factory contract.
dlt	warning	direct_implementation_import	dlt/destinations/impl/bigquery/bigquery.py	Concrete implementation import bypasses a thin port or factory contract.
dpone	warning	direct_implementation_import	src/dpone/dag/dag_report.py	Concrete implementation import bypasses a thin port or factory contract.
dpone	warning	direct_implementation_import	src/dpone/manifest/batch_loader.py	Concrete implementation import bypasses a thin port or factory contract.
dpone	warning	direct_implementation_import	src/dpone/manifest/explain.py	Concrete implementation import bypasses a thin port or factory contract.
dpone	warning	direct_implementation_import	src/dpone/manifest/explain_trace.py	Concrete implementation import bypasses a thin port or factory contract.

Maintainability risk register

Priority	Project	Module	Reason	Recommended action
P1	airbyte	airbyte-integrations/connectors/source-mssql/src/main/kotlin/io/airbyte/integrations/source/mssql/MsSqlServerDebeziumOperations.kt	module complexity is 154.	Split decision paths behind a smaller service or strategy contract.
P1	airbyte	airbyte-integrations/connectors/source-postgres/src/main/kotlin/io/airbyte/integrations/source/postgres/cdc/PostgresCustomConverter.kt	module complexity is 143.	Split decision paths behind a smaller service or strategy contract.
P1	airbyte	airbyte-integrations/connectors/source-mysql/src/main/kotlin/io/airbyte/integrations/source/mysql/MySqlSourceJdbcPartitionFactory.kt	module complexity is 136.	Split decision paths behind a smaller service or strategy contract.
P1	airbyte	airbyte-cdk/bulk/toolkits/legacy-task-loader/src/main/kotlin/io/airbyte/cdk/load/message/DestinationMessage.kt	module complexity is 123.	Split decision paths behind a smaller service or strategy contract.
P1	airbyte	airbyte-integrations/connectors/source-mssql/src/main/kotlin/io/airbyte/integrations/source/mssql/MsSqlServerJdbcPartition.kt	module complexity is 123.	Split decision paths behind a smaller service or strategy contract.
P1	airbyte	airbyte-cdk/bulk/toolkits/extract-cdc/src/main/kotlin/io/airbyte/cdk/read/cdc/CdcPartitionReader.kt	module complexity is 116.	Split decision paths behind a smaller service or strategy contract.
P1	airbyte	airbyte-cdk/java/airbyte-cdk/db-sources/src/main/kotlin/io/airbyte/cdk/integrations/source/jdbc/AbstractJdbcSource.kt	module complexity is 110.	Split decision paths behind a smaller service or strategy contract.
P1	airbyte	airbyte-integrations/connectors/source-mssql/src/main/kotlin/io/airbyte/integrations/source/mssql/MsSqlSourceMetadataQuerier.kt	module complexity is 110.	Split decision paths behind a smaller service or strategy contract.
P1	apache-hop	core/src/main/java/org/apache/hop/core/row/value/ValueMetaBase.java	module complexity is 1135.	Split decision paths behind a smaller service or strategy contract.
P1	apache-hop	ui/src/main/java/org/apache/hop/ui/hopgui/file/pipeline/HopGuiPipelineGraph.java	module complexity is 814.	Split decision paths behind a smaller service or strategy contract.

Semantic Maintainability Deep Scan

This layer looks inside the code shape, not just repository size. It highlights god modules, god classes, god functions, SOLID/DI contract pressure, Clean Code responsibility spread, and DRY/KISS signals that determine whether the framework can scale without turning into a hard-to-change platform.

Project	Overall	Status	God object	SOLID/DI	DRY/KISS	Boundary	God modules	God classes	God functions
Airbyte	75	strong	37	93	83	96	15	60	22
Apache Hop	57	watch	40	59	73	63	15	0	0
dlt	21	risk	34	0	52	0	12	53	78
dpone	78	strong	93	80	50	79	0	58	108
Pentaho Kettle	56	watch	40	50	70	74	15	0	0
Sling	55	watch	40	63	19	100	15	0	0

God object radar

Project	Kind	Module	Object	Value
Airbyte	module	airbyte-integrations/connectors/source-github/source_github/github_schema.py	module	41,035 LOC
Airbyte	class	airbyte-integrations/connectors/source-github/source_github/github_schema.py	Mutation	3,636 LOC
Airbyte	module	airbyte-integrations/connectors/source-shopify/source_shopify/shopify_graphql/bulk/query.py	module	3,531 LOC
Airbyte	module	airbyte-integrations/bases/base-normalization/normalization/transform_catalog/reserved_keywords.py	module	3,276 LOC
Airbyte	module	airbyte-integrations/connectors/source-github/source_github/streams.py	module	1,955 LOC
Apache Hop	module	core/src/main/java/org/apache/hop/core/row/value/ValueMetaBase.java	module	5,998 LOC
Apache Hop	module	ui/src/main/java/org/apache/hop/ui/hopgui/file/pipeline/HopGuiPipelineGraph.java	module	5,861 LOC
Apache Hop	module	ui/src/main/java/org/apache/hop/ui/hopgui/file/workflow/HopGuiWorkflowGraph.java	module	4,760 LOC
Apache Hop	module	core/src/main/java/org/apache/hop/core/database/Database.java	module	4,719 LOC
Apache Hop	module	engine/src/main/java/org/apache/hop/pipeline/transform/BaseTransform.java	module	4,084 LOC
dlt	module	dlt/pipeline/pipeline.py	module	2,013 LOC
dlt	class	dlt/pipeline/pipeline.py	Pipeline	1,728 LOC
dlt	module	dlt/common/libs/pyarrow.py	module	1,588 LOC
dlt	module	dlt/destinations/impl/filesystem/filesystem.py	module	1,575 LOC
dlt	module	dlt/common/schema/utils.py	module	1,503 LOC
dpone	class	src/dpone/runtime/reconciliation/bigquery/store.py	BigQueryReconciliationStore	420 LOC
dpone	class	src/dpone/runtime/connectors/api/omnidesk_connector.py	OmnideskConnector	413 LOC
dpone	class	src/dpone/runtime/connectors/api/connector.py	AbstractAPIConnector	409 LOC
dpone	class	src/dpone/runtime/sinks/strategies/postgres/file_export_loader.py	PostgresFileExportLoader	405 LOC
dpone	class	src/dpone/runtime/state/factory.py	StateFactory	393 LOC
Pentaho Kettle	module	ui/src/main/java/org/pentaho/di/ui/spoon/Spoon.java	module	10,532 LOC
Pentaho Kettle	module	engine/src/main/java/org/pentaho/di/trans/TransMeta.java	module	6,834 LOC
Pentaho Kettle	module	engine/src/main/java/org/pentaho/di/trans/Trans.java	module	5,891 LOC
Pentaho Kettle	module	core/src/main/java/org/pentaho/di/core/row/value/ValueMetaBase.java	module	5,538 LOC
Pentaho Kettle	module	core/src/main/java/org/pentaho/di/core/database/Database.java	module	5,376 LOC
Sling	module	core/dbio/database/database.go	module	4,198 LOC
Sling	module	core/dbio/api/api_test.go	module	4,075 LOC
Sling	module	core/dbio/iop/datastream.go	module	3,300 LOC
Sling	module	core/dbio/api/spec_test.go	module	2,874 LOC
Sling	module	core/dbio/iop/transforms_test.go	module	2,738 LOC

SOLID/DI/Clean Code evidence

Project	Interface density	Direct impl imports	Finding
Airbyte	0.293	0	Constructor dependency signals detected: 737.; Interface/protocol density is 0.293.
Apache Hop	0.167	0	Constructor dependency signals detected: 0.; Interface/protocol density is 0.167.
dlt	0.211	31	Constructor dependency signals detected: 1357.; Interface/protocol density is 0.211.
dpone	0.381	4	Constructor dependency signals detected: 1461.; Interface/protocol density is 0.381.
Pentaho Kettle	0.247	0	Constructor dependency signals detected: 0.; Interface/protocol density is 0.247.
Sling	2.322	0	Constructor dependency signals detected: 0.; Interface/protocol density is 2.322.

DRY/KISS responsibility signals

Project	Responsibility spread	Branch hotspots	Finding
Airbyte	8	215	Responsibility spread covers 8 architectural tags.; Branch hotspots: 215; god functions: 22.
Apache Hop	6	798	Responsibility spread covers 6 architectural tags.; Branch hotspots: 798; god functions: 0.
dlt	7	162	Responsibility spread covers 7 architectural tags.; Branch hotspots: 162; god functions: 78.
dpone	11	446	Responsibility spread covers 11 architectural tags.; Branch hotspots: 446; god functions: 108.
Pentaho Kettle	6	879	Responsibility spread covers 6 architectural tags.; Branch hotspots: 879; god functions: 0.
Sling	1	101	Responsibility spread covers 1 architectural tags.; Branch hotspots: 101; god functions: 0.

Semantic maintainability risk register

Priority	Project	Module	Reason	Recommendation
P1	airbyte	airbyte-integrations/bases/base-normalization/normalization/transform_catalog/reserved_keywords.py	module module is 3276 LOC.	Split responsibility behind a smaller service, strategy, renderer, or port.
P1	airbyte	airbyte-integrations/bases/base-normalization/normalization/transform_catalog/stream_processor.py	module module is 1530 LOC.	Split responsibility behind a smaller service, strategy, renderer, or port.
P1	airbyte	airbyte-integrations/bases/base-normalization/normalization/transform_catalog/stream_processor.py	class StreamProcessor is 1426 LOC.	Split responsibility behind a smaller service, strategy, renderer, or port.
P1	airbyte	airbyte-integrations/connectors/source-github/source_github/github_schema.py	module module is 41035 LOC.	Split responsibility behind a smaller service, strategy, renderer, or port.
P1	airbyte	airbyte-integrations/connectors/source-github/source_github/github_schema.py	class Mutation is 3636 LOC.	Split responsibility behind a smaller service, strategy, renderer, or port.
P1	airbyte	airbyte-integrations/connectors/source-github/source_github/streams.py	module module is 1955 LOC.	Split responsibility behind a smaller service, strategy, renderer, or port.
P1	airbyte	airbyte-integrations/connectors/source-google-ads/source_google_ads/components.py	module module is 1322 LOC.	Split responsibility behind a smaller service, strategy, renderer, or port.
P1	airbyte	airbyte-integrations/connectors/source-shopify/source_shopify/shopify_graphql/bulk/query.py	module module is 3531 LOC.	Split responsibility behind a smaller service, strategy, renderer, or port.
P1	apache-hop	core/src/main/java/org/apache/hop/core/database/Database.java	module module is 4719 LOC.	Split responsibility behind a smaller service, strategy, renderer, or port.
P1	apache-hop	core/src/main/java/org/apache/hop/core/row/value/ValueMetaBase.java	module module is 5998 LOC.	Split responsibility behind a smaller service, strategy, renderer, or port.

Scoring Validity & Calibration

This section makes the executive scorecard harder to misread and harder to game. It shows raw scores next to language/repo-normalized scores, tests whether small threshold changes would reshuffle rankings, and flags signals that could inflate maintainability without improving the design.

Language/repo normalization

Project	Raw	Normalized	Adjustment	Profile	Repo scale	Python	JVM	TS/JS	Other
Airbyte	75	38	-37.0	python-library	product-codebase	96.8%	3.2%	0.0%	0.0%
Apache Hop	56	9	-47.0	jvm-platform	large-monorepo	0.0%	100.0%	0.0%	0.0%
dlt	57	0	-57.0	python-library	product-codebase	100.0%	0.0%	0.0%	0.0%
dpone	92	78	-14.0	python-framework	product-codebase	100.0%	0.0%	0.0%	0.0%
Pentaho Kettle	46	0	-46.0	jvm-platform	large-monorepo	0.0%	100.0%	0.0%	0.0%
Sling	45	0	-45.0	mixed-monorepo	focused-framework	0.0%	0.0%	0.0%	100.0%

Sensitivity analysis

Project	+/-10% threshold swing	Stability	Most sensitive metric	Low-threshold score	High-threshold score
airbyte	0	stable	module_size	38	38
apache-hop	2	stable	module_size	8	10
dlt	0	stable	semantic_floor	0	0
dpone	0	stable	god_object	78	78
pentaho-kettle	0	stable	module_size	0	0
sling	0	stable	module_size	0	0

Anti-gaming guardrails

Project	Guardrail	Status	Message
airbyte	Micro-module pressure	passed	No micro-module gaming pressure detected.
airbyte	Hollow-interface pressure	passed	Interface density looks proportional to implementation evidence.
airbyte	Score-gaming resistance	warning	Normalized score differs from raw score by -37 points.
apache-hop	Micro-module pressure	passed	No micro-module gaming pressure detected.
apache-hop	Hollow-interface pressure	passed	Interface density looks proportional to implementation evidence.
apache-hop	Score-gaming resistance	warning	Normalized score differs from raw score by -47 points.
dlt	Micro-module pressure	passed	No micro-module gaming pressure detected.
dlt	Hollow-interface pressure	passed	Interface density looks proportional to implementation evidence.
dlt	Score-gaming resistance	warning	Normalized score differs from raw score by -57 points.
dpone	Micro-module pressure	passed	No micro-module gaming pressure detected.
dpone	Hollow-interface pressure	passed	Interface density looks proportional to implementation evidence.
dpone	Score-gaming resistance	warning	Normalized score differs from raw score by -14 points.
pentaho-kettle	Micro-module pressure	passed	No micro-module gaming pressure detected.
pentaho-kettle	Hollow-interface pressure	passed	Interface density looks proportional to implementation evidence.
pentaho-kettle	Score-gaming resistance	warning	Normalized score differs from raw score by -46 points.
sling	Micro-module pressure	passed	No micro-module gaming pressure detected.
sling	Hollow-interface pressure	warning	High interface density with no implementation pressure may indicate score-padding.
sling	Score-gaming resistance	warning	Normalized score differs from raw score by -45 points.

Score explanation cards

Project	Positive drivers	Negative drivers	Next best action
airbyte	P90 fan-out remains within the language/repo profile budget.	Largest production module exceeds the normalized profile threshold.; 15 production god modules remain above the calibrated threshold.; Normalized score differs from raw score by -37 points.	Split the largest production modules behind the existing runtime contracts.
apache-hop	n/a	Largest production module exceeds the normalized profile threshold.; P90 fan-out exceeds the calibrated coupling budget.; 15 production god modules remain above the calibrated threshold.	Split the largest production modules behind the existing runtime contracts.
dlt	n/a	Largest production module exceeds the normalized profile threshold.; P90 fan-out exceeds the calibrated coupling budget.; 12 production god modules remain above the calibrated threshold.	Split the largest production modules behind the existing runtime contracts.
dpone	Largest production module fits the normalized profile threshold.; P90 fan-out remains within the language/repo profile budget.; No production god modules detected.	DRY/KISS responsibility pressure is still visible in semantic evidence.; Normalized score differs from raw score by -14 points.	Extract repeated branching into strategy contracts with one responsibility per class.
pentaho-kettle	n/a	Largest production module exceeds the normalized profile threshold.; P90 fan-out exceeds the calibrated coupling budget.; 15 production god modules remain above the calibrated threshold.	Split the largest production modules behind the existing runtime contracts.
sling	P90 fan-out remains within the language/repo profile budget.	Largest production module exceeds the normalized profile threshold.; 15 production god modules remain above the calibrated threshold.; DRY/KISS responsibility pressure is still visible in semantic evidence.	Split the largest production modules behind the existing runtime contracts.

Scale Readiness & Growth Simulation

This layer answers the main benchmark objection: dpone is smaller today, so the report models whether its architecture can keep quality when the codebase grows toward comparator scale. It is a planning proxy, not a product roadmap or runtime performance forecast.

Quality headroom

Project	Connector slots before yellow	Connector slots before red	Max module headroom	P90 fan-out headroom	Semantic headroom	Normalized score headroom
dpone	3	16	151.0	3.00	3.0	3.0

Architecture runway

Project	Runway score	Status	Growth ceiling SLOC	Primary constraint
dpone	58	constrained	246,928	p90 fan-out

Scale scenarios

Project	Scenario	Growth	Projected SLOC	Projected max module	Projected P90 fan-out	Projected maintainability	Risk
dpone	dlt scale	1.00x	195,728	449	5.00	78	low
dpone	Airbyte scale	1.14x	222,731	465	5.21	78	low
dpone	Pentaho Kettle scale	3.51x	686,539	665	7.08	74	moderate
dpone	Apache Hop scale	3.28x	642,167	649	6.97	74	moderate

Comparator-scale projection

Project	Worst scenario	Runway warning	Next target
dpone	pentaho-scale	Architecture runway score is below the scale-readiness warning threshold.	Raise architecture runway before adding broad connector surface.

Refactor ROI Roadmap

Quality is managed here as an investment portfolio: every generated refactor candidate is ranked by expected debt reduction, actionability, effort feasibility, and target architecture fit.

Quality debt estimate

Project	Debt points	Status	Top driver	Quick wins	Strategic refactors
Airbyte	999	active-debt	complexity	0	10
Apache Hop	999	active-debt	complexity	0	12
dlt	570	active-debt	complexity	0	10
dpone	389	active-debt	complexity	3	11
Pentaho Kettle	999	active-debt	complexity	0	13
Sling	496	active-debt	complexity	0	10

ROI-ranked refactor backlog

Rank	Project	Module	ROI	Impact	Effort	Debt	Quadrant
1	dpone	src/dpone/commands/dag/subgraph_cmd.py	93	100	74	53	high-impact / low-effort
2	dpone	src/dpone/cli_render/manifest/explain.py	91	100	67	59	high-impact / low-effort
3	dpone	src/dpone/commands/dag/list_edges_cmd.py	91	100	67	65	high-impact / low-effort
4	dpone	src/dpone/manifest/validation_profiles.py	88	100	56	54	high-impact / high-effort
5	dpone	src/dpone/dag/load_config_builder.py	87	100	53	58	high-impact / high-effort
6	dpone	src/dpone/manifest/validation_rules.py	87	100	54	57	high-impact / high-effort
7	dpone	src/dpone/runtime/etl_logging/clickhouse_validation.py	86	100	49	55	high-impact / high-effort
8	dpone	tools/oss_benchmark/pr_summary.py	86	100	49	55	high-impact / high-effort
9	dpone	Reduce fan_in pressure in dpone.readiness.migration_control	82	95	45	63	high-impact / high-effort
10	dpone	dpone.readiness.migration_control	82	95	45	71	high-impact / high-effort
11	dpone	dpone.runtime.sources.strategies.mssql.mssql_queryout_artifacts	81	89	53	56	high-impact / high-effort
12	dpone	Lower fan-out in dpone.runtime.sources.strategies.mssql.mssql_queryout_artifacts	80	89	53	48	high-impact / high-effort

Target architecture recommendations

Rank	Module	Target architecture	Recommended action
1	src/dpone/commands/dag/subgraph_cmd.py	Command -> Application service -> Renderer	Split decision paths behind a smaller service or strategy contract.
2	src/dpone/cli_render/manifest/explain.py	Renderer -> View model -> Formatter	Split decision paths behind a smaller service or strategy contract.
3	src/dpone/commands/dag/list_edges_cmd.py	Command -> Application service -> Renderer	Split decision paths behind a smaller service or strategy contract.
4	src/dpone/manifest/validation_profiles.py	Manifest service -> Rule object -> Report renderer	Split decision paths behind a smaller service or strategy contract.
5	src/dpone/dag/load_config_builder.py	DAG query service -> DTO -> CLI renderer	Split decision paths behind a smaller service or strategy contract.
6	src/dpone/manifest/validation_rules.py	Manifest service -> Rule object -> Report renderer	Split decision paths behind a smaller service or strategy contract.
7	src/dpone/runtime/etl_logging/clickhouse_validation.py	Facade -> Service -> Port	Split decision paths behind a smaller service or strategy contract.
8	tools/oss_benchmark/pr_summary.py	Facade -> Service -> Port	Split decision paths behind a smaller service or strategy contract.
9	Reduce fan_in pressure in dpone.readiness.migration_control	Facade -> Service -> Port	Split responsibilities behind narrow contracts and keep public facades as compatibility shims.
10	dpone.readiness.migration_control	Facade -> Service -> Port	Reduce architecture pressure behind a narrower boundary.

Coverage Confidence Matrix

Coverage confidence separates measured runtime coverage from static test footprint. The benchmark does not claim branch/line coverage for external projects unless a coverage signal is visible in the source or CI configuration.

Project	Confidence	Score	Runtime coverage	Test footprint	Test file ratio	CI evidence	Coverage config	Evidence
dpone	high	100	configured	51.0%	33.8%	yes	yes	test footprint 51.0%; 612 test files over 1,810 production files
Airbyte	high	80	ci-only	136.7%	118.3%	yes	no	test footprint 136.7%; 2,840 test files over 2,400 production files
dlt	high	100	configured	116.4%	91.1%	yes	yes	test footprint 116.4%; 659 test files over 723 production files
Pentaho Kettle	medium	49	not detected	29.3%	47.0%	no	no	test footprint 29.3%; 1,655 test files over 3,520 production files
Apache Hop	high	86	configured	20.8%	33.3%	yes	yes	test footprint 20.8%; 1,187 test files over 3,562 production files
Sling	low	27	ci-only	0.3%	2.0%	yes	no	test footprint 0.3%; 3 test files over 150 production files

Architecture Risk Heatmap

The heatmap turns hotspot evidence into a risk score. It highlights where future changes are likely to be expensive: oversized modules, fan-out/fan-in concentration, low cohesion, and dependency clustering.

Project	Risk	Score	Top hotspot	Max LOC	Max Ce	Max Ca	Cohesion	Clustering
dpone	low	16	medium fan_out dpone.runtime.sources.strategies.mssql.mssql_queryout_artifacts (26 Ce)	449	26	88	0.633	0.157
Airbyte	medium	48	critical module_size airbyte-integrations/connectors/source-github/source_github/github_schema.py (41035 LOC)	41,035	44	159	0.604	0.125
dlt	high	74	critical module_size dlt/pipeline/pipeline.py (2013 LOC)	2,013	45	224	0.377	0.226
Pentaho Kettle	critical	100	critical module_size ui/src/main/java/org/pentaho/di/ui/spoon/Spoon.java (10532 LOC)	10,532	234	1,240	0.319	0.276
Apache Hop	critical	100	critical module_size core/src/main/java/org/apache/hop/core/row/value/ValueMetaBase.java (5998 LOC)	5,998	143	1,138	0.188	0.235
Sling	high	50	critical module_size core/dbio/database/database.go (4198 LOC)	4,198	0	0	0.000	0.000

Architecture risk drill-down

• dpone: medium fan_out dpone.runtime.sources.strategies.mssql.mssql_queryout_artifacts (26 Ce); medium fan_in dpone.readiness.migration_control (69 Ca) Approved high fan-in contracts: dpone.output_json (output serialization port, Ca 88), dpone.output_text (output text rendering port, Ca 87), dpone.runtime.sources.extract_result (source extraction DTO, Ca 45), dpone.runtime.sinks.load_payload (sink load payload DTO, Ca 38), dpone.config.load_strategy (load strategy enum contract, Ca 34)
• Airbyte: critical module_size airbyte-integrations/connectors/source-github/source_github/github_schema.py (41035 LOC); medium fan_out io.airbyte.cdk.load.lowcode.DeclarativeDestinationFactory (44 Ce); high fan_in io.airbyte.cdk.load.command.DestinationStream (159 Ca) Approved high fan-in contracts: none in current top fan-in candidates.
• dlt: critical module_size dlt/pipeline/pipeline.py (2013 LOC); medium fan_out dlt.pipeline.pipeline (45 Ce); critical fan_in dlt.common.typing (224 Ca); medium cohesion cross-slice dependency pressure (0.377 ratio); medium clustering dependency triangle pressure (0.226 coefficient) Approved high fan-in contracts: none in current top fan-in candidates.
• Pentaho Kettle: critical module_size ui/src/main/java/org/pentaho/di/ui/spoon/Spoon.java (10532 LOC); critical fan_out org.pentaho.di.ui.spoon.Spoon (234 Ce); critical fan_in org.pentaho.di.i18n.BaseMessages (1240 Ca); high cohesion cross-slice dependency pressure (0.319 ratio); high clustering dependency triangle pressure (0.276 coefficient) Approved high fan-in contracts: none in current top fan-in candidates.
• Apache Hop: critical module_size core/src/main/java/org/apache/hop/core/row/value/ValueMetaBase.java (5998 LOC); critical fan_out org.apache.hop.ui.hopgui.file.pipeline.HopGuiPipelineGraph (143 Ce); critical fan_in org.apache.hop.i18n.BaseMessages (1138 Ca); critical cohesion cross-slice dependency pressure (0.188 ratio); medium clustering dependency triangle pressure (0.235 coefficient) Approved high fan-in contracts: none in current top fan-in candidates.
• Sling: critical module_size core/dbio/database/database.go (4198 LOC); critical cohesion cross-slice dependency pressure (0.000 ratio) Approved high fan-in contracts: none in current top fan-in candidates.

Architecture Taxonomy & Contract Discipline

This layer turns SOLID/DRY/KISS expectations into a public benchmark signal: thin architectural slices, explicit source/sink/CDC contracts, canonical naming, dependency-inversion boundaries and god-module prevention.

Project	Taxonomy score	Band	Contract conformance	Naming	DI boundary	Approved facades	Slices	Top violation
dpone	95	leader	99	100	98	56	140	none
Airbyte	70	strong	98	100	95	0	2	none
dlt	63	watch	92	100	73	0	21	none
Pentaho Kettle	58	watch	90	100	67	0	4	none
Apache Hop	54	watch	86	100	54	0	3	none
Sling	75	strong	100	100	100	0	2	none

Slice heatmap

dpone slices

Slice	Modules	LOC	SLOC	Max LOC	Interface files	Naming violations
other	582	62,788	52,722	442	68	0
ops	241	39,585	33,580	422	10	0
services	139	19,309	16,207	441	10	0
commands	142	17,530	14,853	437	8	0
runtime.sources	119	12,577	10,507	408	21	2
runtime.sinks	84	12,260	10,267	424	6	2
runtime.connectors	64	10,757	9,007	436	5	3
manifest	54	6,608	5,351	418	0	1

Airbyte slices

Slice	Modules	LOC	SLOC	Max LOC	Interface files	Naming violations
other	2,349	290,863	219,072	41,035	70	2
config	51	4,630	3,659	519	2	0

dlt slices

Slice	Modules	LOC	SLOC	Max LOC	Interface files	Naming violations
other	625	130,010	101,096	2,013	7	2
commands	3	2,164	1,841	758	0	0
manifest	1	692	560	692	0	0
runtime.collector	1	476	408	476	0	0
runtime.run_context	1	317	238	317	0	0
runtime.exec_info	1	310	230	310	0	0
runtime.anon_tracker	1	239	168	239	0	0
runtime.json_logging	1	210	164	210	0	0

Pentaho Kettle slices

Slice	Modules	LOC	SLOC	Max LOC	Interface files	Naming violations
other	3,487	997,658	684,753	10,532	438	8
services	20	2,127	816	634	4	0
metrics	7	987	573	226	1	0
config	6	812	397	523	0	0

Apache Hop slices

Slice	Modules	LOC	SLOC	Max LOC	Interface files	Naming violations
other	3,504	895,277	637,288	5,998	205	25
config	52	6,436	4,303	614	1	0
metrics	6	928	576	236	0	0

Sling slices

Slice	Modules	LOC	SLOC	Max LOC	Interface files	Naming violations
other	148	100,605	79,254	4,198	30	0
config	1	2,163	1,767	2,163	0	0

Contract conformance findings

• dpone: no contract-discipline violations crossed the watch threshold; 56 documented compatibility facades were excluded from active-risk scoring.
• Airbyte: no contract-discipline violations crossed the watch threshold; 0 documented compatibility facades were excluded from active-risk scoring.
• dlt: no contract-discipline violations crossed the watch threshold; 0 documented compatibility facades were excluded from active-risk scoring.
• Pentaho Kettle: no contract-discipline violations crossed the watch threshold; 0 documented compatibility facades were excluded from active-risk scoring.
• Apache Hop: no contract-discipline violations crossed the watch threshold; 0 documented compatibility facades were excluded from active-risk scoring.
• Sling: no contract-discipline violations crossed the watch threshold; 0 documented compatibility facades were excluded from active-risk scoring.

Architecture taxonomy evidence is stored in raw JSON under architecture_taxonomy.summary.

Executive scorecard

Project	Corpus	Source commit	Files without tests	LOC without tests	SLOC without tests	Max LOC	Max SLOC	Avg Ce	P90 Ce	Cohesion	Clustering	SOLID	Clean OOP	Test footprint	Release delta	Stale age	Freshness
dpone dirty	local-framework	codex/release-v0.62.1@3f562b42ebc8db96a14361ce93353486faa23af4	1,810	233,810	195,728	449	397	2.08	5	0.633	0.157	5.0/5	5.0/5	51.0%	unchanged	0	fresh; updated 2026-06-30T15:36:13+00:00
Airbyte	oss-core	master@84c2d165ef11293b11e2321062e89996908d2f63	2,400	295,493	222,731	41,035	28,633	1.82	6	0.604	0.125	4.2/5	4.0/5	136.7%	unchanged	0	fresh; updated 2026-06-30T15:36:13+00:00
dlt	oss-core	devel@f5999614b613254961a9073310a5db6b13dc279d	723	140,090	108,848	2,013	1,631	4.69	12	0.377	0.226	4.2/5	4.0/5	116.4%	unchanged	0	fresh; updated 2026-06-30T15:36:13+00:00
Pentaho Kettle	oss-core	master@89db5885a1e92e81eb01149cb3e536cc23482c39	3,520	1,001,584	686,539	10,532	7,948	8.18	23	0.319	0.276	1.4/5	1.1/5	29.3%	unchanged	0	fresh; updated 2026-06-30T15:36:13+00:00
Apache Hop	oss-core	main@6aad589666c8458216b8685bb749d2b6dbd1b2f0	3,562	902,641	642,167	5,998	4,584	7.98	19	0.188	0.235	2.1/5	2.6/5	20.8%	unchanged	0	fresh; updated 2026-06-30T15:36:13+00:00
Sling	oss-core	main@6c4ca04c3328eb32da480780c9957bf17f80ffb5	150	102,799	81,045	4,198	3,379	0.00	0	0.000	0.000	3.1/5	2.7/5	0.3%	unchanged	0	fresh; updated 2026-06-30T15:36:13+00:00

Comparable OSS corpus

• Airbyte is included as an open-source data movement platform with a large connector and platform codebase.
• dlt is included as an open-source Python data loading library.
• Pentaho Kettle is included as a mature open-source ETL/data-integration baseline.
• Apache Hop is included as a modern open-source orchestration and data-integration platform in the Kettle/Hop lineage.
• Sling is included as an open-source CLI-first data movement and replication baseline.
• Fivetran is closed-core / not code-comparable for managed ELT. Its public repositories expose SDK/provider surfaces, not the managed platform core.
• Informatica PowerCenter/IDMC is closed-core / not code-comparable. Public product positioning is useful context, but the core source is unavailable for the same metrics.

Methodology

• Source scope: Python, Java, Kotlin, TypeScript, JavaScript, Go, Groovy and Scala files.
• Excluded noise: build/cache/vendor directories and root-level tooling folders such as tools, target, build, dist, .cache, node_modules and test_artifacts.
• Test exclusion: path segments such as test, tests, integration-tests, __tests__, plus filename patterns such as *Test.java, *_test.py, *.spec.ts and *.test.ts.
• Coupling: static imports resolved to internal repository modules where possible.
• Cohesion: share of internal dependency edges that stay inside the same top-level architectural slice.
• SOLID and Clean OOP: 0-5 rubric scores based on measurable proxies: module size, fan-out, clustering, cohesion and explicit interface/protocol density.
• Visual assets: docs/benchmarks/assets/oss-quality-scorecard.svg, docs/benchmarks/assets/dpone-trust-center-badge.svg, docs/benchmarks/assets/oss-release-readiness-seal.svg, docs/benchmarks/assets/oss-evidence-confidence.svg, docs/benchmarks/assets/oss-public-evidence-integrity.svg, docs/benchmarks/assets/oss-source-verification.svg, docs/benchmarks/assets/oss-independent-validation.svg, docs/benchmarks/assets/oss-analyzer-confidence.svg, docs/benchmarks/assets/oss-feature-parity.svg, docs/benchmarks/assets/oss-governance-compliance.svg, docs/benchmarks/assets/oss-operability-tco.svg, docs/benchmarks/assets/oss-operational-reliability.svg, docs/benchmarks/assets/oss-security-supply-chain.svg, docs/benchmarks/assets/oss-architecture-taxonomy.svg, docs/benchmarks/assets/oss-complexity-boundary.svg, docs/benchmarks/assets/oss-semantic-maintainability.svg, docs/benchmarks/assets/oss-god-object-radar.svg, docs/benchmarks/assets/oss-score-calibration.svg, docs/benchmarks/assets/oss-score-sensitivity.svg, docs/benchmarks/assets/oss-normalized-vs-raw.svg, docs/benchmarks/assets/oss-scale-readiness.svg, docs/benchmarks/assets/oss-architecture-runway.svg, docs/benchmarks/assets/oss-quality-headroom.svg, docs/benchmarks/assets/oss-refactor-roi-roadmap.svg, docs/benchmarks/assets/oss-loc-sloc.svg, docs/benchmarks/assets/oss-coupling-cohesion-quadrant.svg, docs/benchmarks/assets/oss-module-hotspots.svg, docs/benchmarks/assets/oss-architecture-risk-heatmap.svg, docs/benchmarks/assets/oss-quality-trend.svg.
• Release readiness pack: docs/benchmarks/oss-benchmark-release-readiness-2026-06-12.md (open pack) and docs/benchmarks/data/oss-benchmark-release-readiness-2026-06-12.json (open JSON).
• Raw evidence: docs/benchmarks/data/oss-code-quality-benchmark-2026-06-12.json (open JSON).
• Provenance ledger: docs/benchmarks/data/oss-benchmark-provenance.json (open ledger).
• Trend history: docs/benchmarks/data/oss-code-quality-benchmark-history.json (open history JSON).
• PR benchmark summary: test_artifacts/oss-code-quality-benchmark/pr-comment.md.

Data freshness policy

• A fresh metric group was collected successfully in the latest run.
• A stale metric group keeps the last known published value, shows when it was last updated, and records the latest failed refresh attempt.
• An unavailable metric group has no prior evidence and is rendered as n/a; values are never fabricated.
• Manual CI refreshes can update all projects or a single project through the workflow inputs.

Quality reading

dpone

• Freshness: fresh; updated 2026-06-30T15:36:13+00:00.
• Test footprint: 51.0% based on 99,786 test SLOC over 195,728 production SLOC.
• Coupling: avg Ce 2.08, P90 Ce 5, max Ce 26 at dpone.runtime.sources.strategies.mssql.mssql_queryout_artifacts.
• Cohesion: 0.633 within slice, cross-slice ratio 0.367, clustering 0.157.
• SOLID 5.0/5, Clean OOP 5.0/5: largest module stays within the 600 LOC target (449); average fan-out is controlled (2.08); P90 fan-out is controlled (5); average clustering is inside the green target (0.157).

Airbyte

• Freshness: fresh; updated 2026-06-30T15:36:13+00:00.
• Test footprint: 136.7% based on 304,464 test SLOC over 222,731 production SLOC.
• Coupling: avg Ce 1.82, P90 Ce 6, max Ce 44 at io.airbyte.cdk.load.lowcode.DeclarativeDestinationFactory.
• Cohesion: 0.604 within slice, cross-slice ratio 0.396, clustering 0.125.
• SOLID 4.2/5, Clean OOP 4.0/5: largest module is very large (41035 LOC); average fan-out is controlled (1.82); P90 fan-out is controlled (6); average clustering is inside the green target (0.125).

dlt

• Freshness: fresh; updated 2026-06-30T15:36:13+00:00.
• Test footprint: 116.4% based on 126,656 test SLOC over 108,848 production SLOC.
• Coupling: avg Ce 4.69, P90 Ce 12, max Ce 45 at dlt.pipeline.pipeline.
• Cohesion: 0.377 within slice, cross-slice ratio 0.623, clustering 0.226.
• SOLID 4.2/5, Clean OOP 4.0/5: largest module is very large (2013 LOC); average fan-out is controlled (4.69); P90 fan-out is controlled (12).

Pentaho Kettle

• Freshness: fresh; updated 2026-06-30T15:36:13+00:00.
• Test footprint: 29.3% based on 201,128 test SLOC over 686,539 production SLOC.
• Coupling: avg Ce 8.18, P90 Ce 23, max Ce 234 at org.pentaho.di.ui.spoon.Spoon.
• Cohesion: 0.319 within slice, cross-slice ratio 0.681, clustering 0.276.
• SOLID 1.4/5, Clean OOP 1.1/5: largest module is very large (10532 LOC); P90 module size is high (655 LOC); P90 fan-out is high (23); top module fan-out is very high (234).

Apache Hop

• Freshness: fresh; updated 2026-06-30T15:36:13+00:00.
• Test footprint: 20.8% based on 133,823 test SLOC over 642,167 production SLOC.
• Coupling: avg Ce 7.98, P90 Ce 19, max Ce 143 at org.apache.hop.ui.hopgui.file.pipeline.HopGuiPipelineGraph.
• Cohesion: 0.188 within slice, cross-slice ratio 0.812, clustering 0.235.
• SOLID 2.1/5, Clean OOP 2.6/5: largest module is very large (5998 LOC); P90 fan-out is high (19); top module fan-out is very high (143); cohesion ratio is low (0.188).

Sling

• Freshness: fresh; updated 2026-06-30T15:36:13+00:00.
• Test footprint: 0.3% based on 240 test SLOC over 81,045 production SLOC.
• Coupling: avg Ce 0.00, P90 Ce 0, max Ce 0 at api.api.
• Cohesion: 0.000 within slice, cross-slice ratio 0.000, clustering 0.000.
• SOLID 3.1/5, Clean OOP 2.7/5: largest module is very large (4198 LOC); P90 module size is high (1554 LOC); average fan-out is controlled (0.00); P90 fan-out is controlled (0).

dpone position

dpone is much smaller than Airbyte, Pentaho Kettle and Apache Hop, but its current quality posture is competitive because the codebase keeps production modules under the release SLOC gate, maintains low average fan-out (2.08), and exposes quality metrics as a first-class documented gate.

The new architecture taxonomy makes the next quality target explicit: dpone is currently leader on taxonomy and 99 on contract conformance after documented compatibility facades are separated from active-risk scoring. The remaining target is narrower: source/sink runtime code should depend on connector ports/protocols instead of concrete connector implementations. This is a focused refactor target, not a product-readiness blocker: the benchmark now names the exact seams to clean before connector breadth scales further.

The main comparative advantage is architectural controllability: dpone can keep industrial ETL features, route certification, source-sink matrices and runtime evidence under a tight module-size and dependency budget while larger platforms carry more historical surface area. The next quality target is to keep clustering and contract conformance inside the green zone as new runtime capabilities land, so the product can grow toward Airbyte/Pentaho/Hop feature breadth without inheriting their maintainability drag.

Appendix: detailed metric tables

dpone top modules

Top 15 modules by LOC (with tests)

Module	LOC	SLOC	Test?
tests/test_oss_code_quality_benchmark.py	3869	3561	yes
tests/test_operations_maturity_services.py	1843	1591	yes
tests/test_cli_operations_commands.py	1352	1194	yes
tests/test_cli_gitops_airflow_commands.py	1163	1007	yes
tests/test_gitops_airflow_runner_pack.py	1004	860	yes
tests/test_runtime_mssql_contracts.py	918	746	yes
tests/integration/mssql/test_mssql_clickhouse_live_cdc_runtime_integration.py	917	855	yes
tests/integration/conftest.py	885	732	yes
tests/test_schema_migration_bundle_cli.py	752	681	yes
tests/test_architecture_fitness_gate.py	723	608	yes
tests/test_gitops_airflow_git_sync_contract.py	602	512	yes
tests/test_live_certification_automation.py	597	531	yes
tests/test_runtime_credentials_contracts.py	559	480	yes
tests/test_mssql_clickhouse_type_fidelity.py	550	453	yes
tests/test_columnar_fast_path_contracts.py	542	457	yes

Top 15 modules by SLOC (with tests)

Module	LOC	SLOC	Test?
tests/test_oss_code_quality_benchmark.py	3869	3561	yes
tests/test_operations_maturity_services.py	1843	1591	yes
tests/test_cli_operations_commands.py	1352	1194	yes
tests/test_cli_gitops_airflow_commands.py	1163	1007	yes
tests/test_gitops_airflow_runner_pack.py	1004	860	yes
tests/integration/mssql/test_mssql_clickhouse_live_cdc_runtime_integration.py	917	855	yes
tests/test_runtime_mssql_contracts.py	918	746	yes
tests/integration/conftest.py	885	732	yes
tests/test_schema_migration_bundle_cli.py	752	681	yes
tests/test_architecture_fitness_gate.py	723	608	yes
tests/test_live_certification_automation.py	597	531	yes
tests/test_gitops_airflow_git_sync_contract.py	602	512	yes
tests/test_runtime_credentials_contracts.py	559	480	yes
tests/test_columnar_fast_path_contracts.py	542	457	yes
tests/test_mssql_clickhouse_type_fidelity.py	550	453	yes

Top 15 modules by LOC (without tests)

Module	LOC	SLOC	Test?
src/dpone/runtime/cdc/retention_models.py	449	376	no
src/dpone/runtime/reconciliation/bigquery/store.py	443	361	no
src/dpone/readiness/nested_certification.py	442	395	no
src/dpone/services/ops/command_handlers_routes.py	441	397	no
src/dpone/readiness/schema_migration_bundle_policy.py	440	377	no
src/dpone/commands/schema_migration_bundle_cmd.py	437	375	no
src/dpone/commands/schema_contract_cmd.py	436	363	no
src/dpone/runtime/connectors/api/connector.py	436	316	no
src/dpone/integration_matrix_models.py	433	393	no
src/dpone/runtime/connectors/api/mindbox.py	431	381	no
src/dpone/runtime/connectors/api/omnidesk_connector.py	431	312	no
src/dpone/commands/schema_plan_cmd.py	430	370	no
src/dpone/runtime/etl_logging/etl_logger.py	429	348	no
src/dpone/commands/ops_parsers_artifacts.py	427	364	no
src/dpone/commands/schema_migration_registry_cmd.py	427	384	no

Top 15 modules by SLOC (without tests)

Module	LOC	SLOC	Test?
src/dpone/commands/ops_cmd.py	400	397	no
src/dpone/services/ops/command_handlers_routes.py	441	397	no
src/dpone/readiness/nested_certification.py	442	395	no
src/dpone/integration_matrix_models.py	433	393	no
src/dpone/commands/schema_migration_registry_cmd.py	427	384	no
src/dpone/runtime/sinks/strategies/postgres/file_export_loader.py	424	383	no
src/dpone/services/gitops/airflow_render_service.py	421	383	no
src/dpone/runtime/connectors/api/mindbox.py	431	381	no
src/dpone/services/schema_migration.py	414	381	no
src/dpone/readiness/schema_migration_bundle_policy.py	440	377	no
src/dpone/runtime/cdc/retention_models.py	449	376	no
src/dpone/commands/gitops/airflow_cmd.py	426	375	no
src/dpone/commands/schema_migration_bundle_cmd.py	437	375	no
src/dpone/readiness/studio_api.py	402	372	no
src/dpone/runtime/state/mssql.py	408	371	no

Airbyte top modules

Top 15 modules by LOC (with tests)

Module	LOC	SLOC	Test?
airbyte-integrations/connectors/source-github/source_github/github_schema.py	41035	28633	no
airbyte-cdk/bulk/toolkits/legacy-task-loader/src/testFixtures/kotlin/io/airbyte/cdk/load/write/BasicFunctionalityIntegrationTest.kt	5230	4638	yes
airbyte-cdk/bulk/core/load/src/testFixtures/kotlin/io/airbyte/cdk/load/write/BasicFunctionalityIntegrationTest.kt	5191	4598	yes
airbyte-integrations/connectors/source-shopify/source_shopify/shopify_graphql/bulk/query.py	3531	3001	no
airbyte-integrations/bases/base-normalization/normalization/transform_catalog/reserved_keywords.py	3276	3244	no
airbyte-integrations/connectors/source-salesforce/integration_tests/state_migration.py	2626	2620	yes
airbyte-cdk/java/airbyte-cdk/db-destinations/src/testFixtures/kotlin/io/airbyte/cdk/integrations/standardtest/destination/DestinationAcceptanceTest.kt	2621	2051	yes
airbyte-integrations/connectors/source-github/unit_tests/test_stream.py	2432	2060	yes
airbyte-cdk/java/airbyte-cdk/typing-deduping/src/testFixtures/kotlin/io/airbyte/integrations/base/destination/typing_deduping/BaseSqlGeneratorIntegrationTest.kt	2008	1605	yes
airbyte-integrations/connectors/source-github/source_github/streams.py	1955	1545	no
airbyte-cdk/java/airbyte-cdk/db-sources/src/testFixtures/kotlin/io/airbyte/cdk/integrations/source/jdbc/test/JdbcSourceAcceptanceTest.kt	1933	1698	yes
airbyte-integrations/connectors/source-facebook-marketing/unit_tests/test_base_insight_streams.py	1841	1620	yes
airbyte-cdk/java/airbyte-cdk/db-sources/src/testFixtures/kotlin/io/airbyte/cdk/integrations/debezium/CdcSourceTest.kt	1657	1399	yes
airbyte-cdk/java/airbyte-cdk/typing-deduping/src/testFixtures/kotlin/io/airbyte/integrations/base/destination/typing_deduping/BaseTypingDedupingTest.kt	1657	1244	yes
airbyte-integrations/connectors/source-shopify/unit_tests/conftest.py	1622	1493	yes

Top 15 modules by SLOC (with tests)

Module	LOC	SLOC	Test?
airbyte-integrations/connectors/source-github/source_github/github_schema.py	41035	28633	no
airbyte-cdk/bulk/toolkits/legacy-task-loader/src/testFixtures/kotlin/io/airbyte/cdk/load/write/BasicFunctionalityIntegrationTest.kt	5230	4638	yes
airbyte-cdk/bulk/core/load/src/testFixtures/kotlin/io/airbyte/cdk/load/write/BasicFunctionalityIntegrationTest.kt	5191	4598	yes
airbyte-integrations/bases/base-normalization/normalization/transform_catalog/reserved_keywords.py	3276	3244	no
airbyte-integrations/connectors/source-shopify/source_shopify/shopify_graphql/bulk/query.py	3531	3001	no
airbyte-integrations/connectors/source-salesforce/integration_tests/state_migration.py	2626	2620	yes
airbyte-integrations/connectors/source-github/unit_tests/test_stream.py	2432	2060	yes
airbyte-cdk/java/airbyte-cdk/db-destinations/src/testFixtures/kotlin/io/airbyte/cdk/integrations/standardtest/destination/DestinationAcceptanceTest.kt	2621	2051	yes
airbyte-cdk/java/airbyte-cdk/db-sources/src/testFixtures/kotlin/io/airbyte/cdk/integrations/source/jdbc/test/JdbcSourceAcceptanceTest.kt	1933	1698	yes
airbyte-integrations/connectors/source-facebook-marketing/unit_tests/test_base_insight_streams.py	1841	1620	yes
airbyte-cdk/java/airbyte-cdk/typing-deduping/src/testFixtures/kotlin/io/airbyte/integrations/base/destination/typing_deduping/BaseSqlGeneratorIntegrationTest.kt	2008	1605	yes
airbyte-integrations/connectors/source-github/source_github/streams.py	1955	1545	no
airbyte-integrations/connectors/source-shopify/unit_tests/conftest.py	1622	1493	yes
airbyte-cdk/java/airbyte-cdk/db-sources/src/testFixtures/kotlin/io/airbyte/cdk/integrations/debezium/CdcSourceTest.kt	1657	1399	yes
airbyte-integrations/bases/base-normalization/normalization/transform_catalog/stream_processor.py	1530	1360	no

Top 15 modules by LOC (without tests)

Module	LOC	SLOC	Test?
airbyte-integrations/connectors/source-github/source_github/github_schema.py	41035	28633	no
airbyte-integrations/connectors/source-shopify/source_shopify/shopify_graphql/bulk/query.py	3531	3001	no
airbyte-integrations/bases/base-normalization/normalization/transform_catalog/reserved_keywords.py	3276	3244	no
airbyte-integrations/connectors/source-github/source_github/streams.py	1955	1545	no
airbyte-integrations/bases/base-normalization/normalization/transform_catalog/stream_processor.py	1530	1360	no
airbyte-integrations/connectors/source-google-ads/source_google_ads/components.py	1322	1041	no
airbyte-integrations/connectors/source-outbrain-amplify/source_outbrain_amplify/source.py	1234	982	no
airbyte-integrations/connectors/source-salesforce/source_salesforce/streams.py	1131	969	no
airbyte-integrations/connectors/source-hubspot/components.py	989	789	no
airbyte-integrations/connectors/destination-snowflake-cortex/destination_snowflake_cortex/common/sql/sql_processor.py	975	783	no
airbyte-integrations/connectors/source-shopify/source_shopify/streams/base_streams.py	963	724	no
airbyte-integrations/connectors/destination-pgvector/destination_pgvector/common/sql/sql_processor.py	957	765	no
airbyte-cdk/java/airbyte-cdk/db-sources/src/main/kotlin/io/airbyte/cdk/integrations/source/jdbc/AbstractJdbcSource.kt	905	796	no
airbyte-integrations/connectors/source-mssql/src/main/kotlin/io/airbyte/integrations/source/mssql/MsSqlServerDebeziumOperations.kt	889	642	no
airbyte-integrations/connectors/source-amazon-seller-partner/components.py	873	699	no

Top 15 modules by SLOC (without tests)

Module	LOC	SLOC	Test?
airbyte-integrations/connectors/source-github/source_github/github_schema.py	41035	28633	no
airbyte-integrations/bases/base-normalization/normalization/transform_catalog/reserved_keywords.py	3276	3244	no
airbyte-integrations/connectors/source-shopify/source_shopify/shopify_graphql/bulk/query.py	3531	3001	no
airbyte-integrations/connectors/source-github/source_github/streams.py	1955	1545	no
airbyte-integrations/bases/base-normalization/normalization/transform_catalog/stream_processor.py	1530	1360	no
airbyte-integrations/connectors/source-google-ads/source_google_ads/components.py	1322	1041	no
airbyte-integrations/connectors/source-outbrain-amplify/source_outbrain_amplify/source.py	1234	982	no
airbyte-integrations/connectors/source-salesforce/source_salesforce/streams.py	1131	969	no
airbyte-cdk/java/airbyte-cdk/db-sources/src/main/kotlin/io/airbyte/cdk/integrations/source/jdbc/AbstractJdbcSource.kt	905	796	no
airbyte-integrations/connectors/source-hubspot/components.py	989	789	no
airbyte-integrations/connectors/destination-snowflake-cortex/destination_snowflake_cortex/common/sql/sql_processor.py	975	783	no
airbyte-integrations/connectors/destination-pgvector/destination_pgvector/common/sql/sql_processor.py	957	765	no
airbyte-integrations/connectors/source-shopify/source_shopify/streams/base_streams.py	963	724	no
airbyte-integrations/connectors/source-amazon-seller-partner/components.py	873	699	no
airbyte-cdk/bulk/toolkits/legacy-task-loader/src/main/kotlin/io/airbyte/cdk/load/message/DestinationMessage.kt	794	697	no

dlt top modules

Top 15 modules by LOC (with tests)

Module	LOC	SLOC	Test?
tests/pipeline/test_pipeline.py	5926	4359	yes
tests/extract/test_incremental.py	4847	3800	yes
tests/extract/test_sources.py	2294	1619	yes
tests/load/sources/sql_database/test_sql_database_source.py	2140	1724	yes
tests/load/pipeline/test_merge_disposition.py	2136	1722	yes
tests/sources/rest_api/integration/test_offline.py	2083	1849	yes
tests/libs/test_pydantic.py	2047	1457	yes
dlt/pipeline/pipeline.py	2013	1631	no
docs/education/dlt-advanced-course/lesson_9_performance_optimisation.py	1970	1390	no
tests/common/configuration/test_configuration.py	1883	1360	yes
tests/load/test_dummy_client.py	1868	1389	yes
tests/extract/test_decorators.py	1839	1263	yes
tests/extract/test_extract.py	1826	1354	yes
tests/load/test_read_interfaces.py	1796	1300	yes
tests/pipeline/test_schema_contracts.py	1631	1224	yes

Top 15 modules by SLOC (with tests)

Module	LOC	SLOC	Test?
tests/pipeline/test_pipeline.py	5926	4359	yes
tests/extract/test_incremental.py	4847	3800	yes
tests/sources/rest_api/integration/test_offline.py	2083	1849	yes
tests/load/sources/sql_database/test_sql_database_source.py	2140	1724	yes
tests/load/pipeline/test_merge_disposition.py	2136	1722	yes
dlt/pipeline/pipeline.py	2013	1631	no
tests/extract/test_sources.py	2294	1619	yes
tests/libs/test_pydantic.py	2047	1457	yes
docs/education/dlt-advanced-course/lesson_9_performance_optimisation.py	1970	1390	no
tests/load/test_dummy_client.py	1868	1389	yes
tests/common/configuration/test_configuration.py	1883	1360	yes
tests/extract/test_extract.py	1826	1354	yes
tests/load/test_read_interfaces.py	1796	1300	yes
tests/load/utils.py	1580	1298	yes
tests/extract/test_decorators.py	1839	1263	yes

Top 15 modules by LOC (without tests)

Module	LOC	SLOC	Test?
dlt/pipeline/pipeline.py	2013	1631	no
docs/education/dlt-advanced-course/lesson_9_performance_optimisation.py	1970	1390	no
docs/education/dlt-advanced-course/lesson_1_custom_sources_restapi_source_and_restclient.py	1621	1244	no
dlt/common/libs/pyarrow.py	1588	1243	no
dlt/destinations/impl/filesystem/filesystem.py	1575	1246	no
dlt/common/schema/utils.py	1503	1142	no
docs/education/dlt-advanced-course/lesson_6_write_disposition_strategies_and_advanced_tricks.py	1379	938	no
dlt/common/schema/schema.py	1331	1088	no
dlt/sources/rest_api/config_setup.py	1139	914	no
dlt/common/libs/sqlglot.py	1122	868	no
dlt/destinations/impl/weaviate/weaviate_client.py	1106	892	no
dlt/extract/decorators.py	1076	862	no
dlt/destinations/sql_jobs.py	1030	877	no
dlt/_workspace/helpers/dashboard/dlt_dashboard.py	1029	878	no
dlt/common/data_writers/writers.py	1022	811	no

Top 15 modules by SLOC (without tests)

Module	LOC	SLOC	Test?
dlt/pipeline/pipeline.py	2013	1631	no
docs/education/dlt-advanced-course/lesson_9_performance_optimisation.py	1970	1390	no
dlt/destinations/impl/filesystem/filesystem.py	1575	1246	no
docs/education/dlt-advanced-course/lesson_1_custom_sources_restapi_source_and_restclient.py	1621	1244	no
dlt/common/libs/pyarrow.py	1588	1243	no
dlt/common/schema/utils.py	1503	1142	no
dlt/common/schema/schema.py	1331	1088	no
docs/education/dlt-advanced-course/lesson_6_write_disposition_strategies_and_advanced_tricks.py	1379	938	no
dlt/sources/rest_api/config_setup.py	1139	914	no
dlt/destinations/impl/weaviate/weaviate_client.py	1106	892	no
dlt/_workspace/helpers/dashboard/dlt_dashboard.py	1029	878	no
dlt/destinations/sql_jobs.py	1030	877	no
dlt/common/libs/sqlglot.py	1122	868	no
dlt/extract/decorators.py	1076	862	no
dlt/sources/helpers/rest_client/paginators.py	1001	826	no

Pentaho Kettle top modules

Top 15 modules by LOC (with tests)

Module	LOC	SLOC	Test?
ui/src/main/java/org/pentaho/di/ui/spoon/Spoon.java	10532	7948	no
engine/src/main/java/org/pentaho/di/trans/TransMeta.java	6834	3613	no
engine/src/main/java/org/pentaho/di/trans/Trans.java	5891	3378	no
core/src/main/java/org/pentaho/di/core/row/value/ValueMetaBase.java	5538	3928	no
core/src/main/java/org/pentaho/di/core/database/Database.java	5376	3774	no
ui/src/main/java/org/pentaho/di/ui/spoon/trans/TransGraph.java	5098	3800	no
engine/src/main/java/org/pentaho/di/trans/step/BaseStep.java	4424	2423	no
core/src/main/java/org/pentaho/di/core/Const.java	4390	1745	no
core/src/main/java/org/pentaho/di/compatibility/Value.java	3951	2578	no
ui/src/main/java/org/pentaho/di/ui/spoon/job/JobGraph.java	3904	2944	no
plugins/pur/core/src/main/java/org/pentaho/di/repository/pur/PurRepository.java	3633	2885	no
ui/src/main/java/org/pentaho/di/ui/core/widget/TableView.java	3311	2514	no
ui/src/main/java/org/pentaho/di/ui/trans/steps/textfileinput/TextFileInputDialog.java	3301	2693	no
core/src/main/java/org/pentaho/di/core/database/DatabaseMeta.java	3165	1778	no
engine/src/main/java/org/pentaho/di/repository/kdr/KettleDatabaseRepositoryCreationHelper.java	3122	2584	no

Top 15 modules by SLOC (with tests)

Module	LOC	SLOC	Test?
ui/src/main/java/org/pentaho/di/ui/spoon/Spoon.java	10532	7948	no
core/src/main/java/org/pentaho/di/core/row/value/ValueMetaBase.java	5538	3928	no
ui/src/main/java/org/pentaho/di/ui/spoon/trans/TransGraph.java	5098	3800	no
core/src/main/java/org/pentaho/di/core/database/Database.java	5376	3774	no
engine/src/main/java/org/pentaho/di/trans/TransMeta.java	6834	3613	no
engine/src/main/java/org/pentaho/di/trans/Trans.java	5891	3378	no
ui/src/main/java/org/pentaho/di/ui/spoon/job/JobGraph.java	3904	2944	no
plugins/pur/core/src/main/java/org/pentaho/di/repository/pur/PurRepository.java	3633	2885	no
ui/src/main/java/org/pentaho/di/ui/trans/steps/textfileinput/TextFileInputDialog.java	3301	2693	no
engine/src/main/java/org/pentaho/di/repository/kdr/KettleDatabaseRepositoryCreationHelper.java	3122	2584	no
core/src/main/java/org/pentaho/di/compatibility/Value.java	3951	2578	no
ui/src/main/java/org/pentaho/di/ui/repository/dialog/RepositoryExplorerDialog.java	3045	2549	no
ui/src/main/java/org/pentaho/di/ui/trans/steps/fileinput/text/TextFileInputDialog.java	3090	2525	no
ui/src/main/java/org/pentaho/di/ui/core/widget/TableView.java	3311	2514	no
engine/src/main/java/org/pentaho/di/trans/steps/scriptvalues_mod/ScriptValuesAddedFunctions.java	2882	2490	no

Top 15 modules by LOC (without tests)

Module	LOC	SLOC	Test?
ui/src/main/java/org/pentaho/di/ui/spoon/Spoon.java	10532	7948	no
engine/src/main/java/org/pentaho/di/trans/TransMeta.java	6834	3613	no
engine/src/main/java/org/pentaho/di/trans/Trans.java	5891	3378	no
core/src/main/java/org/pentaho/di/core/row/value/ValueMetaBase.java	5538	3928	no
core/src/main/java/org/pentaho/di/core/database/Database.java	5376	3774	no
ui/src/main/java/org/pentaho/di/ui/spoon/trans/TransGraph.java	5098	3800	no
engine/src/main/java/org/pentaho/di/trans/step/BaseStep.java	4424	2423	no
core/src/main/java/org/pentaho/di/core/Const.java	4390	1745	no
core/src/main/java/org/pentaho/di/compatibility/Value.java	3951	2578	no
ui/src/main/java/org/pentaho/di/ui/spoon/job/JobGraph.java	3904	2944	no
plugins/pur/core/src/main/java/org/pentaho/di/repository/pur/PurRepository.java	3633	2885	no
ui/src/main/java/org/pentaho/di/ui/core/widget/TableView.java	3311	2514	no
ui/src/main/java/org/pentaho/di/ui/trans/steps/textfileinput/TextFileInputDialog.java	3301	2693	no
core/src/main/java/org/pentaho/di/core/database/DatabaseMeta.java	3165	1778	no
engine/src/main/java/org/pentaho/di/repository/kdr/KettleDatabaseRepositoryCreationHelper.java	3122	2584	no

Top 15 modules by SLOC (without tests)

Module	LOC	SLOC	Test?
ui/src/main/java/org/pentaho/di/ui/spoon/Spoon.java	10532	7948	no
core/src/main/java/org/pentaho/di/core/row/value/ValueMetaBase.java	5538	3928	no
ui/src/main/java/org/pentaho/di/ui/spoon/trans/TransGraph.java	5098	3800	no
core/src/main/java/org/pentaho/di/core/database/Database.java	5376	3774	no
engine/src/main/java/org/pentaho/di/trans/TransMeta.java	6834	3613	no
engine/src/main/java/org/pentaho/di/trans/Trans.java	5891	3378	no
ui/src/main/java/org/pentaho/di/ui/spoon/job/JobGraph.java	3904	2944	no
plugins/pur/core/src/main/java/org/pentaho/di/repository/pur/PurRepository.java	3633	2885	no
ui/src/main/java/org/pentaho/di/ui/trans/steps/textfileinput/TextFileInputDialog.java	3301	2693	no
engine/src/main/java/org/pentaho/di/repository/kdr/KettleDatabaseRepositoryCreationHelper.java	3122	2584	no
core/src/main/java/org/pentaho/di/compatibility/Value.java	3951	2578	no
ui/src/main/java/org/pentaho/di/ui/repository/dialog/RepositoryExplorerDialog.java	3045	2549	no
ui/src/main/java/org/pentaho/di/ui/trans/steps/fileinput/text/TextFileInputDialog.java	3090	2525	no
ui/src/main/java/org/pentaho/di/ui/core/widget/TableView.java	3311	2514	no
engine/src/main/java/org/pentaho/di/trans/steps/scriptvalues_mod/ScriptValuesAddedFunctions.java	2882	2490	no

Apache Hop top modules

Top 15 modules by LOC (with tests)

Module	LOC	SLOC	Test?
core/src/main/java/org/apache/hop/core/row/value/ValueMetaBase.java	5998	4500	no
ui/src/main/java/org/apache/hop/ui/hopgui/file/pipeline/HopGuiPipelineGraph.java	5861	4584	no
ui/src/main/java/org/apache/hop/ui/hopgui/file/workflow/HopGuiWorkflowGraph.java	4760	3729	no
core/src/main/java/org/apache/hop/core/database/Database.java	4719	3405	no
core/src/test/java/org/apache/hop/core/ConstTest.java	4137	3689	yes
engine/src/main/java/org/apache/hop/pipeline/transform/BaseTransform.java	4084	2341	no
ui/src/main/java/org/apache/hop/ui/core/widget/TableView.java	3807	2906	no
ui/src/main/java/org/apache/hop/ui/hopgui/perspective/explorer/ExplorerPerspective.java	3789	3014	no
engine/src/main/java/org/apache/hop/pipeline/Pipeline.java	3604	2166	no
engine/src/main/java/org/apache/hop/pipeline/PipelineMeta.java	3492	2089	no
plugins/transforms/textfile/src/main/java/org/apache/hop/pipeline/transforms/fileinput/text/TextFileInputDialog.java	3330	2755	no
core/src/main/java/org/apache/hop/core/Const.java	3117	1648	no
plugins/transforms/javascript/src/main/java/org/apache/hop/pipeline/transforms/javascript/ScriptValuesAddedFunctions.java	2983	2641	no
plugins/misc/mail/src/main/java/org/apache/hop/mail/pipeline/transforms/mail/MailDialog.java	2541	2091	no
ui/src/main/java/org/apache/hop/ui/hopgui/HopGui.java	2442	1900	no

Top 15 modules by SLOC (with tests)

Module	LOC	SLOC	Test?
ui/src/main/java/org/apache/hop/ui/hopgui/file/pipeline/HopGuiPipelineGraph.java	5861	4584	no
core/src/main/java/org/apache/hop/core/row/value/ValueMetaBase.java	5998	4500	no
ui/src/main/java/org/apache/hop/ui/hopgui/file/workflow/HopGuiWorkflowGraph.java	4760	3729	no
core/src/test/java/org/apache/hop/core/ConstTest.java	4137	3689	yes
core/src/main/java/org/apache/hop/core/database/Database.java	4719	3405	no
ui/src/main/java/org/apache/hop/ui/hopgui/perspective/explorer/ExplorerPerspective.java	3789	3014	no
ui/src/main/java/org/apache/hop/ui/core/widget/TableView.java	3807	2906	no
plugins/transforms/textfile/src/main/java/org/apache/hop/pipeline/transforms/fileinput/text/TextFileInputDialog.java	3330	2755	no
plugins/transforms/javascript/src/main/java/org/apache/hop/pipeline/transforms/javascript/ScriptValuesAddedFunctions.java	2983	2641	no
engine/src/main/java/org/apache/hop/pipeline/transform/BaseTransform.java	4084	2341	no
engine/src/main/java/org/apache/hop/pipeline/Pipeline.java	3604	2166	no
plugins/misc/mail/src/main/java/org/apache/hop/mail/pipeline/transforms/mail/MailDialog.java	2541	2091	no
engine/src/main/java/org/apache/hop/pipeline/PipelineMeta.java	3492	2089	no
ui/src/main/java/org/apache/hop/ui/hopgui/HopGui.java	2442	1900	no
plugins/transforms/xml/src/main/java/org/apache/hop/pipeline/transforms/xml/getxmldata/GetXmlDataDialog.java	2207	1868	no

Top 15 modules by LOC (without tests)

Module	LOC	SLOC	Test?
core/src/main/java/org/apache/hop/core/row/value/ValueMetaBase.java	5998	4500	no
ui/src/main/java/org/apache/hop/ui/hopgui/file/pipeline/HopGuiPipelineGraph.java	5861	4584	no
ui/src/main/java/org/apache/hop/ui/hopgui/file/workflow/HopGuiWorkflowGraph.java	4760	3729	no
core/src/main/java/org/apache/hop/core/database/Database.java	4719	3405	no
engine/src/main/java/org/apache/hop/pipeline/transform/BaseTransform.java	4084	2341	no
ui/src/main/java/org/apache/hop/ui/core/widget/TableView.java	3807	2906	no
ui/src/main/java/org/apache/hop/ui/hopgui/perspective/explorer/ExplorerPerspective.java	3789	3014	no
engine/src/main/java/org/apache/hop/pipeline/Pipeline.java	3604	2166	no
engine/src/main/java/org/apache/hop/pipeline/PipelineMeta.java	3492	2089	no
plugins/transforms/textfile/src/main/java/org/apache/hop/pipeline/transforms/fileinput/text/TextFileInputDialog.java	3330	2755	no
core/src/main/java/org/apache/hop/core/Const.java	3117	1648	no
plugins/transforms/javascript/src/main/java/org/apache/hop/pipeline/transforms/javascript/ScriptValuesAddedFunctions.java	2983	2641	no
plugins/misc/mail/src/main/java/org/apache/hop/mail/pipeline/transforms/mail/MailDialog.java	2541	2091	no
ui/src/main/java/org/apache/hop/ui/hopgui/HopGui.java	2442	1900	no
core/src/main/java/org/apache/hop/core/database/DatabaseMeta.java	2386	1493	no

Top 15 modules by SLOC (without tests)

Module	LOC	SLOC	Test?
ui/src/main/java/org/apache/hop/ui/hopgui/file/pipeline/HopGuiPipelineGraph.java	5861	4584	no
core/src/main/java/org/apache/hop/core/row/value/ValueMetaBase.java	5998	4500	no
ui/src/main/java/org/apache/hop/ui/hopgui/file/workflow/HopGuiWorkflowGraph.java	4760	3729	no
core/src/main/java/org/apache/hop/core/database/Database.java	4719	3405	no
ui/src/main/java/org/apache/hop/ui/hopgui/perspective/explorer/ExplorerPerspective.java	3789	3014	no
ui/src/main/java/org/apache/hop/ui/core/widget/TableView.java	3807	2906	no
plugins/transforms/textfile/src/main/java/org/apache/hop/pipeline/transforms/fileinput/text/TextFileInputDialog.java	3330	2755	no
plugins/transforms/javascript/src/main/java/org/apache/hop/pipeline/transforms/javascript/ScriptValuesAddedFunctions.java	2983	2641	no
engine/src/main/java/org/apache/hop/pipeline/transform/BaseTransform.java	4084	2341	no
engine/src/main/java/org/apache/hop/pipeline/Pipeline.java	3604	2166	no
plugins/misc/mail/src/main/java/org/apache/hop/mail/pipeline/transforms/mail/MailDialog.java	2541	2091	no
engine/src/main/java/org/apache/hop/pipeline/PipelineMeta.java	3492	2089	no
ui/src/main/java/org/apache/hop/ui/hopgui/HopGui.java	2442	1900	no
plugins/transforms/xml/src/main/java/org/apache/hop/pipeline/transforms/xml/getxmldata/GetXmlDataDialog.java	2207	1868	no
plugins/transforms/excel/src/main/java/org/apache/hop/pipeline/transforms/excelinput/ExcelInputDialog.java	2230	1777	no

Sling top modules

Top 15 modules by LOC (with tests)

Module	LOC	SLOC	Test?
core/dbio/database/database.go	4198	3263	no
core/dbio/api/api_test.go	4075	3379	no
core/dbio/iop/datastream.go	3300	2566	no
core/dbio/api/spec_test.go	2874	2384	no
core/dbio/iop/transforms_test.go	2738	2544	no
core/dbio/iop/datatype.go	2646	2086	no
core/dbio/filesys/fs.go	2237	1710	no
core/sling/replication.go	2190	1725	no
core/sling/config.go	2163	1767	no
core/dbio/iop/duckdb.go	1894	1433	no
cmd/sling/sling_test.go	1835	1541	no
core/dbio/database/database_iceberg.go	1760	1287	no
core/dbio/filesys/fs_test.go	1670	1263	no
core/dbio/iop/stream_processor.go	1638	1371	no
core/dbio/database/schemata.go	1604	1269	no

Top 15 modules by SLOC (with tests)

Module	LOC	SLOC	Test?
core/dbio/api/api_test.go	4075	3379	no
core/dbio/database/database.go	4198	3263	no
core/dbio/iop/datastream.go	3300	2566	no
core/dbio/iop/transforms_test.go	2738	2544	no
core/dbio/api/spec_test.go	2874	2384	no
core/dbio/iop/datatype.go	2646	2086	no
core/sling/config.go	2163	1767	no
core/sling/replication.go	2190	1725	no
core/dbio/filesys/fs.go	2237	1710	no
cmd/sling/sling_test.go	1835	1541	no
core/dbio/iop/duckdb.go	1894	1433	no
core/dbio/iop/stream_processor.go	1638	1371	no
core/dbio/database/database_iceberg.go	1760	1287	no
core/dbio/database/schemata.go	1604	1269	no
core/dbio/filesys/fs_test.go	1670	1263	no

Top 15 modules by LOC (without tests)

Module	LOC	SLOC	Test?
core/dbio/database/database.go	4198	3263	no
core/dbio/api/api_test.go	4075	3379	no
core/dbio/iop/datastream.go	3300	2566	no
core/dbio/api/spec_test.go	2874	2384	no
core/dbio/iop/transforms_test.go	2738	2544	no
core/dbio/iop/datatype.go	2646	2086	no
core/dbio/filesys/fs.go	2237	1710	no
core/sling/replication.go	2190	1725	no
core/sling/config.go	2163	1767	no
core/dbio/iop/duckdb.go	1894	1433	no
cmd/sling/sling_test.go	1835	1541	no
core/dbio/database/database_iceberg.go	1760	1287	no
core/dbio/filesys/fs_test.go	1670	1263	no
core/dbio/iop/stream_processor.go	1638	1371	no
core/dbio/database/schemata.go	1604	1269	no

Top 15 modules by SLOC (without tests)

Module	LOC	SLOC	Test?
core/dbio/api/api_test.go	4075	3379	no
core/dbio/database/database.go	4198	3263	no
core/dbio/iop/datastream.go	3300	2566	no
core/dbio/iop/transforms_test.go	2738	2544	no
core/dbio/api/spec_test.go	2874	2384	no
core/dbio/iop/datatype.go	2646	2086	no
core/sling/config.go	2163	1767	no
core/sling/replication.go	2190	1725	no
core/dbio/filesys/fs.go	2237	1710	no
cmd/sling/sling_test.go	1835	1541	no
core/dbio/iop/duckdb.go	1894	1433	no
core/dbio/iop/stream_processor.go	1638	1371	no
core/dbio/database/database_iceberg.go	1760	1287	no
core/dbio/database/schemata.go	1604	1269	no
core/dbio/filesys/fs_test.go	1670	1263	no

Reproducibility

uv run python tools/oss_code_quality_benchmark.py --include-external --allow-stale --previous-data docs/benchmarks/data/oss-code-quality-benchmark-2026-06-12.json --baseline-data docs/benchmarks/data/oss-code-quality-benchmark-2026-06-12.json

Generated at 2026-06-30T15:36:13+00:00 for dpone v0.62.1. Static analysis is approximate by design and should be read as a maintainability benchmark, not as a feature or performance benchmark.