qtl2fst
The out-of-memory backend for R/qtl2, feature-complete since 2020 and now purely on upkeep
Comparison · Analytics
cTMed vs vahtian
A side-by-side editorial comparison of cTMed and vahtian — release velocity, themes, recent moves, and the top alternatives to consider.
cTMed vs vahtian: at a glance
What is cTMed?
Continuous-time mediation effects get standardized centrality, six years into steady patch work
cTMed computes direct, indirect and total effects for continuous-time mediation models, with delta-method, Monte Carlo and bootstrap variants of each. Development is a long run of patch releases from the jeksterslab account, roughly every two months, each adding a function or two. The latest adds standardized centrality measures and allows a diagonal sigma across ten standardized estimators.
What is vahtian?
A provenance-first corpus tool hands its verification core to agents over MCP
vahtian freezes a set of research records into a content-hashed, date-locked corpus, verifies it is untampered, and keeps a hash-chained audit ledger. It ships in Python and R with byte-identical content hashes enforced by a golden-hash test in both suites. In five weeks it went from first release to exposing its five core operations through a local stdio MCP server and registering in the MCP Registry.
cTMed vs vahtian: editorial side-by-side
cTMed
2.5ANALYTICS
Continuous-time mediation effects get standardized centrality, six years into steady patch work
◆ Current state
cTMed computes direct, indirect and total effects for continuous-time mediation models, with delta-method, Monte Carlo and bootstrap variants of each. Development is a long run of patch releases from the jeksterslab account, roughly every two months, each adding a function or two. The latest adds standardized centrality measures and allows a diagonal sigma across ten standardized estimators.
◆ Where it's heading
The package is filling out a matrix rather than changing shape: for each effect type there is a delta-method, a Monte Carlo and a bootstrap path, and each release closes another cell. The 2025 releases were largely externally forced — an Armadillo 15.0.x transition at CRAN, a citation addition after the Psychological Methods paper landed — which suggests the statistical core has been settled since the 1.0.6 standardization revision.
◆ Prediction
The diagonal-sigma option has now reached the standardized estimators; extending it to the remaining unstandardized variants is the obvious next cell to fill.
vahtian
3.8ANALYTICS
A provenance-first corpus tool hands its verification core to agents over MCP
◆ Current state
vahtian freezes a set of research records into a content-hashed, date-locked corpus, verifies it is untampered, and keeps a hash-chained audit ledger. It ships in Python and R with byte-identical content hashes enforced by a golden-hash test in both suites. In five weeks it went from first release to exposing its five core operations through a local stdio MCP server and registering in the MCP Registry.
◆ Where it's heading
The direction is explicit in the project's own framing — human-first, AI-second, auditable — and the MCP server is what makes that framing operational rather than rhetorical. Rather than adding judgement, the tool is being positioned as the thing an agent calls to prove a corpus has not moved. The CiteVahti claim-source comparator, mirrored across both languages under a parity gate, extends the same idea to per-claim checking. Everything stays on the user's machine: no accounts, no telemetry.
◆ Prediction
The comparator's per-field epistemic states are the newest and least settled piece; expect the next release to extend those states or to widen the R package's distribution, which is still described as coming.
Alternatives to cTMed and vahtian
Other Analytics products tracked by Sparkpulse, ranked by recent ship velocity. Each card links to a full editorial trajectory and lets you pivot into a head-to-head comparison with either cTMed or vahtian.
mmconvert
A single-purpose mouse map interpolator that solved its problem in 2023 and has coasted since
qtl2convert
A conversion utility in pure maintenance mode, tracking R-devel breakage release by release
PurpleAir
The R client for PurpleAir sensors keeps finding its time-averaging was wrong.
piecepackr
A board game graphics package runs one of the most disciplined deprecation cycles in R.
e2tree
The explainable-ensemble-tree package now measures whether its own explanations are faithful.
See all cTMed alternatives → · See all vahtian alternatives →
Recent activity from cTMed and vahtian
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 18d agovahtianvahtian 0.2.0 ⚡
- 27d agocTMedStandardized centrality measures and diagonal-sigma support
- 1mo agovahtianvahtian v0.1.1 — citation metadata release
- 1mo agovahtianvahtian v.0.1.0 ⚡
- 6mo agocTMedMinor method edits
- 10mo agocTMedPackage citation added for the Psychological Methods paper
- 10mo agocTMedArmadillo 15.0.x compatibility for CRAN
- 1y agocTMedStandardization reworked around the steady-state covariance matrix
- 1y agocTMedBootstrap centrality estimators and MCPhiSigma()
Frequently asked questions
What is the difference between cTMed and vahtian?
They serve adjacent needs but don't currently overlap on shipped themes. vahtian is currently shipping more aggressively (velocity 3.8 vs 2.5), with 1 editorial sparks in the last 30 days against 0. See the at-a-glance table above for a side-by-side breakdown of velocity, recent sparks, and editorial themes.
Is cTMed better than vahtian?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. vahtian is currently shipping more aggressively (velocity 3.8 vs 2.5), with 1 editorial sparks in the last 30 days against 0. For your specific use case, the alternatives sections above list other Analytics products to evaluate alongside.
What are the best alternatives to cTMed?
Top cTMed alternatives in Analytics are ranked by recent ship velocity. Browse the "cTMed alternatives" section above for the current picks, or visit /alternatives/ctmed for the full list with editorial commentary on each.
What are the best alternatives to vahtian?
Top vahtian alternatives in Analytics are ranked by recent ship velocity. Browse the "vahtian alternatives" section above for the current picks, or visit /alternatives/vahtian for the full list with editorial commentary on each.