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Weekly development report as of 2026-10-23
Ivan Irakoze
cardanoWeekly development updates

Weekly development report as of 2026-10-23

CORE TECHNOLOGY This week, the consensus team reported that Praos2, which combines Praos with the Leios overlay, had merged into main. LeiosNotify clients and LeiosFetch servers also moved to main. Work on selecting and fetching Endorser Blocks is next. The team also merged prototype changes that bring Endorser Block diffusion closer to the production desi...
0 up votes and 0 down votes. Total score
Weekly development report as of 2026-10-16
Ivan Irakoze
cardanoWeekly development updates

Weekly development report as of 2026-10-16

CORE TECHNOLOGY This week, the ledger team added Dijkstra forecasting for Leios and extended it with Peras protocol parameters. Forecasting now keeps stake data only in snapshots. The team also defined Leios' EndorserBlock and added a ledger query for the Leios committee. Pool BLS key handling now updates a key's epoch number only when a new key is register...
1 up votes and 0 down votes. Total score
Weekly development report as of 2026-10-09
Ivan Irakoze
Weekly development updatescardano

Weekly development report as of 2026-10-09

CORE TECHNOLOGY This week, the consensus team moved the Leios database to main and split its SQLite backend into modules by job. The mempool now reserves room for an Endorser Block alongside the ranking block, and each transaction carries a second measure for its cost in an Endorser Block. That capacity comes from the protocol parameters in the Dijkstra era...
0 up votes and 0 down votes. Total score
Weekly development report as of 2026-10-02
Ivan Irakoze
Weekly development updatescardano

Weekly development report as of 2026-10-02

CORE TECHNOLOGY This week, the ledger team put most of its effort into Leios and the block header changes that support it. Each protocol now has its own block header interface, which can be specified era by era, and Dijkstra headers no longer rely on a self-reported protocol version. On the Leios side, the ledger now selects the Leios committee at the epoch...
1 up votes and 0 down votes. Total score
Weekly development report as of 2026-09-25
Ivan Irakoze
Weekly development updatesCardano

Weekly development report as of 2026-09-25

CORE TECHNOLOGY This week, the consensus team split the Leios prototype's database into two files, one for data that can still be rolled back and one for settled data, with certified Endorser Blocks moving from the first to the second in the background; operators can put each file on its own disk. Garbage collection now runs in two paced steps, marking rows...
1 up votes and 0 down votes. Total score
Weekly development report as of 2026-09-18
Ivan Irakoze
Weekly development updatesCardano

Weekly development report as of 2026-09-18

CORE TECHNOLOGY This week’s update from the ledger team covers four weeks of work. The headline item: Dijkstra's batch validation now runs Plutus scripts for sub-transactions and counts their execution budgets, closing a gap where sub-transaction validators and minting policies went unchecked and their costs escaped transaction and block limits and script f...
1 up votes and 0 down votes. Total score
Weekly development report as of 2026-09-11
Olga Hryniuk
Weekly development updatesDevelopment+ 1

Weekly development report as of 2026-09-11

CORE TECHNOLOGY This week, the consensus team made several improvements to the Leios prototype. They rewrote the download decision logic so nodes bound both the time and memory spent on pending downloads, prioritize the newest endorser blocks, and avoid saturating the same peer with concurrent requests. They also added a transaction cache so nodes don't re-...
1 up votes and 0 down votes. Total score
Weekly development report as of 2026-09-04
Olga Hryniuk
DevelopmentWeekly development updates+ 1

Weekly development report as of 2026-09-04

CORE TECHNOLOGY Last week, the performance and tracing team benchmarked the Cardano node v.11.1.0 and analyzed both release and pre-release performance. The benchmarks showed reduced process CPU usage, alongside an increase in resident set size, which is being addressed in the v.11.1.1 patch release. The team also enhanced beacon benchmarking with metrics ...
1 up votes and 0 down votes. Total score
Weekly development report as of 2026-08-28
Olga Hryniuk
DevelopmentWeekly development updates+ 1

Weekly development report as of 2026-08-28

CORE TECHNOLOGY This week, the consensus team resolved an issue with the attack in the Leios prototype targeting how nodes announce endorser blocks, which had been causing honest nodes to disconnect from each other (#2179). They also extended db-analyser to read Leios chains, enabling the tool to replay a chain and report the cost of applying each block, in...
1 up votes and 0 down votes. Total score
Weekly development report as of 2026-08-21
Olga Hryniuk
DevelopmentWeekly development updates+ 1

Weekly development report as of 2026-08-21

CORE TECHNOLOGY This week, the ledger team continued advancing Leios support by extending the pool distribution to include the corresponding BLS key and per-pool BLS-attributed stake, making BLS-related pool information available wherever pool distribution data is consumed. The team also began groundwork for a broader refactor of predicate failures toward ...
1 up votes and 0 down votes. Total score
Weekly development report as of 2026-08-14
Olga Hryniuk
Weekly development updatesStatistics

Weekly development report as of 2026-08-14

CORE TECHNOLOGY This week, the consensus team released prototype-2026w32 and continued advancing Leios prototype development. The node now generates and sends endorser-block announcements to peers, which is the first step toward full announcement-based diffusion. The team also added validation to reject malformed Dijkstra blocks and fixed several testnet ob...
2 up votes and 0 down votes. Total score
Weekly development report as of 2026-08-07
Olga Hryniuk
DevelopmentWeekly development updates+ 1

Weekly development report as of 2026-08-07

CORE TECHNOLOGY This week, the performance and tracing team completed benchmarks for the Van Rossem hard fork, covering new Plutus execution budgets, internals, and a PlutusV3 baseline shift. The team also finalized the Hermod package restructure, added cardano-config support to trace-dispatcher, and delivered the genesis cache overhaul and protocol version...
1 up votes and 0 down votes. Total score
Weekly development update as of 2026-07-31
Olga Hryniuk
DevelopmentStatistics+ 1

Weekly development update as of 2026-07-31

CORE TECHNOLOGY This week, the consensus team released prototype-2026w29 (#996), enabling the node to certify and announce endorser blocks inside the forging loop – expected to raise the certification rate and throughput (#2105). They also improved testnet stability by addressing an issue with Dijkstra block handling (#2140), updated the prototype dashboard...
1 up votes and 0 down votes. Total score
Weekly development report as of 2026-07-24
Olga Hryniuk
Development

Weekly development report as of 2026-07-24

CORE TECHNOLOGY Cardano's engineering is now decentralized. Since 2024, IO and its partners have been managing a transition that will conclude in 2027, resulting in several independent firms maintaining at least three Cardano node implementations in Haskell, Rust, and Go, alongside a complete set of formal specifications overseen by member-based organizatio...
1 up votes and 0 down votes. Total score
Weekly development report as of 2026-07-17
Olga Hryniuk
DevelopmentWeekly development updates+ 1

Weekly development report as of 2026-07-17

CORE TECHNOLOGY This week, the consensus team continued to stabilize the Leios testnet, releasing two prototype builds – prototype-2026w27a and prototype-2026w28 – and fixing several bugs identified during testnet runs. The team also implemented a voting dashboard to improve Leios observability, showing how endorser blocks are voted on and certified. They a...
1 up votes and 0 down votes. Total score
Weekly development report as of 2026-07-10
Olga Hryniuk
DevelopmentWeekly development updates+ 1

Weekly development report as of 2026-07-10

CORE TECHNOLOGY This month, the performance and tracing team removed the legacy iohk-monitoring-based tracing backend from cardano-node, eliminating approximately 11,000 lines of outdated code across 15 modules and nine transitive build dependencies. The team also removed RTView from cardano-tracer, with its functionality now fully covered by the Grafana da...
2 up votes and 0 down votes. Total score
Weekly development report as of 2026-06-19
Olga Hryniuk
Weekly development updatesDevelopment+ 1

Weekly development report as of 2026-06-19

CORE TECHNOLOGY This week, the consensus team focused on Mithril integration: nodes running on an on-disk backend can now export snapshots in the portable in-memory format, allowing Mithril signers to obtain the agreed format directly from the node. They also implemented a new snapshot policy that makes ledger state snapshot timing predictable using agreed-...
1 up votes and 0 down votes. Total score
Weekly development report as of 2026-06-12
Olga Hryniuk
developmentWeekly development updates+ 1

Weekly development report as of 2026-06-12

SMART CONTRACTS This week, the Cardano High Assurance team has finalized a beta version of the property-based testing tool and is pursuing internal testing. The team introduced a testing interface to easily explore a vast variety of scenarios, automated positive testing to verify the contracts meet their specifications, negative testing to ensure the testin...
2 up votes and 0 down votes. Total score
Weekly development report as of 2026-06-05
Olga Hryniuk
DevelopmentWeekly development updates+ 1

Weekly development report as of 2026-06-05

CORE TECHNOLOGY This week, the performance and tracing team published release benchmarks for node v.11.0.1 and ran feature benchmarks for TxSubmissionLogicV2 and compiler version comparisons. On the development side, the team removed legacy tracing and completed work on genesis caching and post-processing infrastructure. The cardano-tracer HTTP API for metr...
1 up votes and 0 down votes. Total score
Weekly development report as of 2026-05-29
Olga Hryniuk
Weekly development updatesDevelopment+ 1

Weekly development report as of 2026-05-29

CORE TECHNOLOGY This week, the ledger team focused on the Plutus context performance work: the validation rules now consume precomputed information stored in StAnnTx rather than recomputing it, completing an optimization arc spanning several cycles. In parallel, work began on removing the legacy Coders machinery from the codebase, with several call sites al...
1 up votes and 0 down votes. Total score
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