Month: 2026-03 - Developer Monthly Summary Key features delivered: - Documentation: Replaced external SVG assets with local copies in Leios docs to improve load performance and maintainability. Commit: 04f3184c51582b79f7f6138447c9185045f9ec0d. - CI/CD workflow optimization: Skip D2 diagram generation for forked PRs, reducing CI load and avoiding false positives in fork PRs. Commit: 7d46e0a6838201f3930750d0cb576077418f81a9. - Mempool simulation enhancements: FIFO ordering for bitmap mempool simulator and a CLI option to disable caching of transactions from endorser blocks to improve simulation accuracy and control backpressure. Commits: 6db9a2c0a097b8a6b5c7f104610eff17e6a33985; 4b08de986e3400ffb9f88b0c75cccda17ed74bf3. Major bugs fixed: - No critical bugs reported this month. The changes focus on reliability improvements in mempool ordering, cache backpressure handling, and CI efficiency to prevent disruption on forked PRs. Overall impact and accomplishments: - Improved performance, maintainability, and reliability across documentation, CI/CD processes, and mempool simulations. - Documentation assets now self-contained, leading to faster doc rendering and easier maintenance. - CI workflows are fork-safe, reducing unnecessary builds and resource usage. - Simulation accuracy increased through FIFO ordering and configurable backpressure control, enabling better analysis of processing backlogs. Technologies/skills demonstrated: - Local asset management, CI/CD optimization, command-line interface (CLI) control, and simulation fidelity enhancements. - Versioned changes with clear, focused commits and traceability. Business value: - Faster, more reliable documentation, reduced CI costs and resource usage, and more trustworthy simulation results supporting decision-making and validation of network behavior.

February 2026 highlights for input-output-hk/ouroboros-leios: Delivered core MEV observability enhancements, a scalable mempool/EB architecture, and significant simulation tooling improvements. Implemented Endorser Block and transaction cache support, refactored mempool sizing to scale with EB, and updated default EB capacity to 10 MB for throughput realism. Enhanced realism and performance in large-scale testing with the scaled bitmap simulator and revamped mempool-sim-web core. Strengthened simulation fidelity: txLoad-based metrics, EB-overflow-based EB announcements, and corrected EB certification flow. Documentation and visualization improvements provide clearer risk visibility and operator guidance. Minor but impactful reliability fixes (TxCache update, topology rebuild safety, and cache mode removal) reduce flakiness.

Month: 2026-01 — Progress across security, network resilience, and developer tooling for Ouroboros-Leios. Key outcomes include MEV analysis enhancements (nested transactions CIP-0118, eUTxO considerations, and visibility for phase-2/UTxO contention), a new attack classification framework with observable artifacts for security analysis, and alignment fixes in mitigation taxonomy; Cardano-style P2P networking improvements with dynamic topology churn, visualization, and P2P enabled by default; core runtime and tooling upgrades (new dependencies, O(1) mempool lookups, CLI parsing, and Simulation queue refactor); and performance/quality gains from an LRU-based bound on known txId tracking, plus frontend stability fixes and documentation/landing page enhancements.

Monthly summary for 2025-12 for repository input-output-hk/ouroboros-leios focusing on business value and technical achievements. Emphasis on MEV risk analysis for Linear Leios protocol, with documentation supporting security planning and risk assessment within Cardano ecosystem. No major bug fixes were reported for this scope in December 2025.

For 2025-10, delivered a targeted documentation update in the input-output-hk/ouroboros-leios repository, improving the accessibility and transparency of the monthly review by embedding direct links to YouTube streams, recordings, slides, and notes. This small but impactful change enhances governance, onboarding, and stakeholder communication, aligning with our quality and transparency objectives. The work is fully traceable to the commit 3e093873805a6fa506836ed4429847f5957c0661.

Concise monthly summary for 2025-09 covering Ouroboros Leios work. Focused on delivering value through improved publication, navigation, and documentation quality across a single repository. Key accomplishments include delivering structured CIP communications, expanding the monthly review hub, and fixing documentation link integrity to improve user experience and trust.

Monthly summary for 2025-08 covering the input-output-hk/ouroboros-leios repository. Focus areas were comprehensive CIP/documentation improvements and node-behavior clarity, with targeted fixes to ensure governance, correctness, and maintainability of protocol docs as the network characteristics evolved.

July 2025 monthly summary for input-output-hk/ouroboros-leios. Delivered a breadth of feature work and comprehensive documentation improvements across CIP, mini protocols, and site content, with an emphasis on content freshness, protocol clarity, and onboarding efficiency. Key outcomes include weekly site updates published, extensive CIP specification and documentation enhancements (including CDDL specification for linear, protocol overview, and non-normative constraints), protocol flow refinements, and extensive updates to mini protocols and related documentation. Site content updates (weekly news, livestream link, monthly links) were completed, strengthening community engagement. These efforts enhanced documentation quality, protocol accuracy, and developer experience while maintaining a consistent, collaborative workflow across frontend, docs, and protocol domains.

June 2025 monthly summary for input-output-hk/ouroboros-leios: Focused on delivering user-centric features, improving UX, and strengthening documentation, with notable progress across glossary, tagging, visualization, and protocol overview. Key features delivered include: Leios Glossary Expansion (new terms and definitions for cryptographic techniques, protocol components, and performance metrics); News Article Tagging Enhancements (cross-referencing tags to improve discoverability); Leios Protocol Visualization Documentation using D2 diagrams (setup, generation, IDE integration, and a template diagram); Leios Protocol Overview Documentation (five-stage pipeline, blocks, trade-offs, and design notes); and Progress Reports and Documentation Updates (consolidated weekly/monthly progress, CI notes, CDDL specs, and June meeting links). Major bugs fixed: Discord Invite Link and Cost Estimator Warning Fix (corrected Docusaurus config link and targeted user guidance to the correct Discord channel); and Storage Cost Estimation Documentation Corrections (formatting, numbering, naming in EB/RB sections, spacing, and snake_case variable names) to ensure accuracy. Overall impact: improved site usability, faster onboarding for contributors, stronger content discoverability, and a more maintainable documentation base that supports ongoing R&D and governance. Technologies/skills demonstrated: Docusaurus config fixes, D2 diagram documentation, glossary modeling, cross-tagging and metadata strategies for discoverability, documentation CI/CD practices, and alignment with CIP/README-style overviews.”

May 2025 performance highlights for ouroboros-leios and ouroboros-leios-formal-spec. Delivered strong site/content improvements, docs enhancements, and CI/CD reliability improvements that collectively accelerate publishing cycles, improve user-facing content, and reduce release risk across two coordinated repositories. Key outcomes include: faster site updates with weekly content and a new site diagram; expanded Logbook/Agda documentation and monthly/landing page updates; HTML publishing workflow and run-id flow fixes; robust CI/CD pipelines with artifact handling, npm caching, and redeploy/publish workflow improvements; cleanup of legacy assets and dependencies to reduce technical debt. These efforts improved site quality, documentation coverage, and developer productivity while reducing operational overhead.

April 2025 — Ouroboros-Leios: Delivered comprehensive documentation enhancements, modernized diagrams, and build optimizations that improve clarity, onboarding, and CI efficiency. Notable outputs include Docker multi-stage build to cache dependencies (faster builds), integrated Day 2/3 workshop recaps and Edinburgh cost docs across the full docs suite, and expanded RB/EB reference diagrams with EB-DAG improvements. D2 diagrams were refreshed with a complex RB reference diagram, now rendered as embedded SVG to improve maintainability. Minor doc hygiene fixes, such as fixing an EB ref diagram typo and removing a stray section, completed to ensure consistency and correctness across all materials.

March 2025 monthly summary focused on delivering fresh site content, robust docker builds, and reliability improvements, with concrete business value in content freshness, build portability, and metric accuracy.

February 2025 monthly performance for input-output-hk/ouroboros-leios. Delivered stakeholder-facing features, comprehensive documentation, and site reliability improvements that reduce risk, improve onboarding, and accelerate development. Key achievements delivered this month include: - Launched Weekly update page and weekly updates section to improve stakeholder transparency and alignment (commits 1937102c8ae3c7a1ba0f791647b7874503acf1b5; 3a0d5178766ab9cabaf085a96f5815e33bd92283). - Comprehensive documentation updates covering formal methods, simulation-driven testing, parameters, logbook formatting, and IB section formatting to enhance maintainability and onboarding (ab42108e47486a3783ee4214f0a16a859d3c16ca; cebf3bbf31b516048de213e25f0e549de878a2c7; 600fb93695122743d7a291c1da6a074a64a8b904; f73bf3ac1d8aeb96c5c37f6b4771bac83e860c35; c0e4599b9db8e8ee00abcc38e9a539d5cefbf382). - UI/UX and content enhancements across the site, improving navigation, hero/footer, docs sidebar, and subheaders to strengthen information architecture (6fdfa5992ec146a99b2c78a709a4b4039c23635d; 57c0410f195ed439a70e2bb77baedc9e8b4e9a58; 1ae264a763416294861124fda3f7fd8805015f20; 81172ea7d3afecf74ef9da308c3f37a8dab956f9; 46fa596fc59a017e404c8c860ee0d6cab2cfad5e). - Site stability and security improvements, including fixing broken links, docker image support, and resolving a dependency security issue, reducing risk and enabling reliable conformance testing (0ddf03549422cb176e4b6e717e2fd231ac3b837c; 74db82e69e7a64228ef4c08294da8445a64680ad; f20a11db0c1979475851457f7fa1b8b5e5c50519; bd08a4630ee5af53b964c410005d7442f28c230f; 6bad5ea60f4935be78f31d608c695da864c7e65f; 77dded670ac30a2057fae5b5c407eebda3b0e1ef; b3b477ddd6bffbd4c6f2e5c2f99d453facd833f5; 2b53b735c3bb7a5d43aad798b871e32ab1b4eca9). - CPS references and navigation updates to improve discoverability and tooling access (36669dfb14525171f7dd4d797ded6990834cfdf3; fc57086eac529c5e605fb74ed565bca2ce9049e8; b59b197e74b36d46a3ca3d3e4cc4a073ea8f0dd3).

January 2025 monthly summary for input-output-hk/ouroboros-leios. Key deliveries include Topology Analysis Enhancements and Corrections, CI Workflow Reliability fixes, and Documentation and Onboarding Improvements. These changes improved latency visibility, CI reliability, and developer onboarding, delivering business value through faster feedback loops, more predictable analytics, and clearer architectural guidance. Technologies demonstrated include topology data modeling, latency reporting, CI/CD triggers, and comprehensive documentation practices.