CBTF
A fuzzer for R packages that grew from one argument at a time to parallel runs across whole namespaces.
Comparison · Infra & APIs
Depot vs eratosthenes
A side-by-side editorial comparison of Depot and eratosthenes — release velocity, themes, recent moves, and the top alternatives to consider.
Depot vs eratosthenes: at a glance
| Feature | Depot | eratosthenes |
|---|---|---|
| Sector | Infra & APIs | Infra & APIs |
| Velocity score | 6.3 | 2.5 |
| Sparks · 30d | 1 | 0 |
| Top themes | ci-cd, build-acceleration, test-intelligence, git-hosting | archaeology, bayesian-inference, mcmc, input-validation |
| Last editorial update | 5d ago | 1h ago |
| Website | — | Visit → |
What is Depot?
Depot keeps absorbing the CI stack — tests, networking, runners, now its own git host.
Depot has moved well past build caching. Test results reached general availability in July with org-wide flaky, slow, and recurring failure analytics plus timing-based shard splitting; Sherlock's AI analysis became available on any run rather than only failed ones; and CI jobs can join a Tailscale tailnet to reach private services. The runner fleet now defaults to macOS 26 on M4 hardware, Depot CI understands GitHub stacked pull requests, and Depot Code — a diskless git server backed by blob storage — entered private beta.
What is eratosthenes?
eratosthenes spends 0.1.0 hardening inputs rather than adding chronology methods.
eratosthenes does Bayesian estimation of archaeological chronologies from relative sequences, absolute constraints and artifact assemblages. The 0.0.9 line built out the inference diagnostics — traceplots, histograms, batch-means MCSE reporting, displacement estimation — and then consolidated artifact probability-density estimation into a single gibbs_ad_type(). The 0.1.0 tag turns outward instead, adding validators for every user-supplied structure and replacing seq_check() with a more informative seq_diag().
Depot vs eratosthenes: editorial side-by-side
Depot
6.3INFRA · APIS
Depot keeps absorbing the CI stack — tests, networking, runners, now its own git host.
◆ Current state
Depot has moved well past build caching. Test results reached general availability in July with org-wide flaky, slow, and recurring failure analytics plus timing-based shard splitting; Sherlock's AI analysis became available on any run rather than only failed ones; and CI jobs can join a Tailscale tailnet to reach private services. The runner fleet now defaults to macOS 26 on M4 hardware, Depot CI understands GitHub stacked pull requests, and Depot Code — a diskless git server backed by blob storage — entered private beta.
◆ Where it's heading
The pattern is absorbing each adjacent piece of the pipeline that Depot's position already gives it data about. It runs the builds, so it owns test timing, so it can balance shards; it runs the jobs, so it can diagnose them; it hosts the runners, so it can wire private networking into them. Depot Code extends the same logic upstream to source hosting, which would close the loop between repository and runner. A quieter parallel thread keeps moving SDK- and dashboard-only settings into the CLI, stated explicitly as making projects configurable by agents and scripts.
◆ Prediction
Depot Code widening past private beta and binding more tightly to CI is the move the rest of the window sets up. The test work is also positioned to go from reporting to selection — skipping tests a change cannot affect — since Depot now holds the timing and failure history that would require, though the entries stop short of saying so.
eratosthenes
2.5INFRA · APIS
eratosthenes spends 0.1.0 hardening inputs rather than adding chronology methods.
◆ Current state
eratosthenes does Bayesian estimation of archaeological chronologies from relative sequences, absolute constraints and artifact assemblages. The 0.0.9 line built out the inference diagnostics — traceplots, histograms, batch-means MCSE reporting, displacement estimation — and then consolidated artifact probability-density estimation into a single gibbs_ad_type(). The 0.1.0 tag turns outward instead, adding validators for every user-supplied structure and replacing seq_check() with a more informative seq_diag().
◆ Where it's heading
The package is moving from research code to something a non-author can run. Consolidating estimation behind one function, then wrapping every input class in a validator, are the two steps that make failures legible instead of cryptic, and the diagnostics added earlier serve the same end for the sampler itself. Nothing in the window changes the underlying model; the work is all about making it usable and its output checkable.
◆ Prediction
With inputs validated and diagnostics in place, the next release is more likely to extend the constraint or assemblage modelling than to keep reworking the interface, though the feed's three sparse tags give little to read a cadence from.
Alternatives to Depot and eratosthenes
Other Infra & APIs 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 Depot or eratosthenes.
phyloatlas
An atlas of the tree of life that keeps publishing what it got wrong, and stopped shipping the trees it does not own.
OpenLand
Land-change analysis in R that has spent six years defending one download link.
FoRecoML
The machine-learning arm of a forecast reconciliation toolkit, four months old and already sharing its sibling's plumbing.
FoReco
Forecast reconciliation with a real object model, five years after it started returning bare matrices.
wooldridge
A textbook data package whose whole job is to stay installable, and whose releases prove how much work that is.
See all Depot alternatives → · See all eratosthenes alternatives →
Recent activity from Depot and eratosthenes
Latest ship moves from both products, interleaved chronologically. ⚡ = editorial spark.
- 9d agoDepotmacOS 26 is now the default macOS version for GitHub Actions runners
- 10d agoeratosthenesInput validators added; seq_check() replaced by seq_diag()
- 16d agoDepotDepot CI now supports native GitHub stacked pull requests
- 19d agoDepotSet cache retention when creating a project with --cache-policy-keep-days
- 20d agoDepotView and edit project details from the Depot CLI
- 21d agoDepotTest results are now generally available ⚡
- 29d agoDepotAI analysis available for all Depot CI workflows and jobs
- 1y agoeratosthenesArtifact p.d.f. estimation consolidated into gibbs_ad_type()
- 1y agoeratosthenesMCMC diagnostics arrive: traceplots, histograms, batch-means MCSE
Frequently asked questions
What is the difference between Depot and eratosthenes?
They serve adjacent needs but don't currently overlap on shipped themes. Depot is currently shipping more aggressively (velocity 6.3 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 Depot better than eratosthenes?
Sparkpulse doesn't pick a winner — we score release velocity, not feature parity. Depot is currently shipping more aggressively (velocity 6.3 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 Infra & APIs products to evaluate alongside.
What are the best alternatives to Depot?
Top Depot alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "Depot alternatives" section above for the current picks, or visit /alternatives/depot for the full list with editorial commentary on each.
What are the best alternatives to eratosthenes?
Top eratosthenes alternatives in Infra & APIs are ranked by recent ship velocity. Browse the "eratosthenes alternatives" section above for the current picks, or visit /alternatives/eratosthenes for the full list with editorial commentary on each.