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Yang Chun Ung

PROFILE

Yang Chun Ung

Over 22 months, this developer delivered robust backend and infrastructure solutions across the Planetarium ecosystem, focusing on the 9c-infra repository. They engineered deployment workflows, automated release processes, and enhanced data integrity for blockchain-based game services. Leveraging C#, Kubernetes, and YAML, they implemented features such as daily rolling restarts for remote headless nodes, S3-based snapshot archiving, and Helm-driven service orchestration. Their work included optimizing memory usage, improving monitoring with Grafana and Prometheus, and refining CI/CD pipelines. By addressing reliability, scalability, and operational efficiency, they enabled safer upgrades, reduced downtime, and streamlined cross-platform deployments for both operators and developers.

Overall Statistics

Feature vs Bugs

70%Features

Repository Contributions

760Total
Bugs
111
Commits
760
Features
265
Lines of code
319,141
Activity Months22

Your Network

27 people

Work History

July 2026

4 Commits • 1 Features

Jul 1, 2026

In July 2026, the planetarium/9c-infra work focused on data integrity, release automation, and infrastructure reliability. Key fixes and improvements improved analytics accuracy, prevented import failures, and streamlined release workflows across mainnet/internal environments.

June 2026

35 Commits • 10 Features

Jun 1, 2026

June 2026 focused on reliability, performance, and operator efficiency across 9c-infra, delivering targeted resilience improvements, advanced deployment workflows, and expanded observability. Key features were delivered across SeasonPass, Ragnarok-breaker, and snapshot/Heimdall subsystems, with concrete product-value outcomes such as reduced alarms, safer rollouts, and clearer success signals for operators. The month also introduced stability measures for preload peers, storage optimizations, and robust alerting to enable faster remediation and predictable deployments.

May 2026

45 Commits • 18 Features

May 1, 2026

May 2026 monthly summary for planetarium/9c-infra and planetarium/NineChronicles.Headless focused on reliability, platform modernization, and developer productivity across multiple repos. Key features delivered include the Remote Headless: Daily Scheduled Rolling Restart, which mitigates NetMQ timeouts during heavy P2P traffic by restarting remote-headless instances on a scheduled cadence; the DCC Bridge modernization (Helm chart and ArgoCD application) to bring 9c-main DCC Bridge under Kubernetes, plus enabling the Bridge Worker and Cron Jobs for RDS→iWinv cutover, and migrations of bridge-api.dccnft.com to Kubernetes with HTTP cert scoping. Additional features include market REST endpoint updates, 9c-internal headless image bumps and HTTP/2 keepalive for heimdall, and Seasonpass API reliability improvements (increased GraphQL timeout, memory limits, and adjusted probes cadence); Odin APV update integration; and a lib9c upgrade to 1.36.2. Community node maintenance and cleanup (unlisting, listing) were performed, along with removal of deprecated PL nodes. Cross-repo changes also covered image tag pinning for dcc-bridge, and infrastructure hygiene like cert scoping changes to dccnft.com and the migration path to Kubernetes.

April 2026

58 Commits • 25 Features

Apr 1, 2026

April 2026 monthly performance summary for planetarium/9c-infra and planetarium/NineChronicles.Headless. Delivered storage optimizations, memory-safe snapshot workflows, and robust multi-cluster infrastructure with improved deployment and observability. Emphasizes business value, cost control, stability, and security alongside strong technical execution.

March 2026

1 Commits • 1 Features

Mar 1, 2026

Month: 2026-03 | Repository: planetarium/9c-infra Key features delivered: - Thor Planet Decommissioning: Removed the configuration and details related to the 'thor' planet from the mainnet. Commit: 5ecbe5c88a3521455d7718768e01ac56b80dd536 with message "Shutdown thor". Major bugs fixed: - None reported for this repository in March 2026. Overall impact and accomplishments: - Significantly reduced mainnet surface area and ongoing maintenance burden by decommissioning deprecated Thor assets, lowering security risk and simplifying infra footprint. This aligns with the roadmap and improves readiness for future decommissioning tasks. Technologies/skills demonstrated: - Configuration cleanup and decommissioning workflows - Change management and clear, auditable commit messages - Infra hygiene and traceability in a critical backbone repository

February 2026

21 Commits • 5 Features

Feb 1, 2026

February 2026 performance summary: Delivered network reliability and deployment improvements across core infrastructure and game services. Key features include mainnet community nodes overhaul for connectivity and redundancy, and Heimdall RPC endpoints reliability enhancements, plus container image version updates to deploy the latest builds. Addressed stability and performance concerns by disabling the data-provider in Odin and Heimdall configurations. Also completed a library dependency upgrade for NineChronicles.Headless and fixed configuration typos in mainnet. These efforts reduced risk, improved operability, and supported safer upgrades across environments. Technologies demonstrated include distributed config management (node/endpoints), Docker image tagging and deployment hygiene, RPC endpoint hardening, and dependency management.

January 2026

30 Commits • 13 Features

Jan 1, 2026

January 2026 performance summary for multi-repo platform infrastructure and node ecosystem. Delivered admin UI improvements, image updates, and enhanced node lifecycle capabilities across planetarium/9c-infra and NineChronicles.Headless. Implemented stability fixes for Heimdall RPC, completed dependency upgrades, and aligned container/images to reduce deployment risk and improve network visibility for community nodes.

December 2025

34 Commits • 12 Features

Dec 1, 2025

December 2025 performance summary for planetarium infra and NineChronicles.Headless. Delivered substantive deployments across 9c-infra and Headless with a focus on reliability, QA, and deployment velocity. Highlights include IAP Core Updates and Enhancements (new env var for iap sales webhook URL, redeem API base URL, internal/config and image tweaks), Petpop and general image tag updates, Bridge DB deployment/storage resets, preview environment with Thor tooling integration, and targeted RPC stability improvements (Thor market fix, Fix RPC endpoints for preview, and RPC subsystem restoration). NineChronicles.Headless benefited from Lib9c submodule upgrade for bug fixes and performance gains. Ancillary config cleanups (Delete thor mainnet config, maintenance RPC changes) improved maintainability. Overall impact: improved deployment reliability, faster feature validation in preview, safer restarts with storage reset, and stronger production readiness.

November 2025

33 Commits • 7 Features

Nov 1, 2025

November 2025 monthly summary for Planetarium repositories (NineChronicles.Headless, 9c-infra). The month focused on stabilizing dependencies, refreshing container images, and accelerating environment readiness for testing and production. Key coordination across repo boundaries enabled consistent releases and reduced risk in production rollouts.

October 2025

8 Commits • 6 Features

Oct 1, 2025

October 2025 – Monthly Summary for Planetarium projects (NineChronicles, lib9c, 9c-infra) Key features delivered: - NineChronicles: Character Costume Expansion added new assets with textures, atlases, materials, and skeleton data; Addressable Asset System refactor and data update; Development Environment Patch Release updating Unity/editor version. - lib9c: SetAddressStateCompressed action for efficient state management with unit tests; Expanded default rune slots to 10 (Stat and Skill) with updated deserialization and tests. - 9c-infra: Stripe payment processing enabled via environment keys from Kubernetes secret iap-env; Operational deployment updates stabilizing environments by disabling previewnet and updating iap-internal images. Major bugs fixed: - Deployment stabilization: disabled previewnet in 9c-infra and refreshed iap-internal image tags to latest versions. Overall impact and accomplishments: - Improved runtime performance and network efficiency (state compression) and expanded player customization options. - Streamlined asset loading and management (Addressable assets refactor). - Revenue readiness via Stripe integration and more stable deployment processes. Technologies/skills demonstrated: - C# and Unity workflow, asset pipeline, addressable assets - Data compression with GZip, unit testing and test suite maintenance - Kubernetes secrets, environment-based configuration, and deployment best practices - Version control traceability (commit references)

September 2025

50 Commits • 19 Features

Sep 1, 2025

September 2025 monthly summary highlighting key features delivered, major bugs fixed, overall impact, and technologies demonstrated across Planetarium projects. Delivered stability improvements, dependency upgrades, and cloud/deployment enhancements that reduce risk and accelerate business value. Key outcomes include test stabilization for genesis block initialization, robust avatar data handling, synchronized Lib9c/LibPlanet versions, updated backoffice deployment with AWS integration, and ongoing NCU release readiness and maintenance.

August 2025

53 Commits • 18 Features

Aug 1, 2025

August 2025 across planetarium/9c-infra, planetarium/lib9c, planetarium/NineChronicles.Headless, and planetarium/NineChronicles, delivering high-impact features, reliability improvements, and security hardening across the ecosystem. Key deployments and tuning reduce risk and improve operational efficiency, enabling scalable growth.

July 2025

51 Commits • 18 Features

Jul 1, 2025

July 2025 performance summary focusing on key accomplishments, business value and technical achievements across planetarium/lib9c, NineChronicles, NineChronicles.Headless, and 9c-infra. Delivered a unified serialization framework with dual-format compatibility and versioning; major feature deployments in rune detail CP display, dependency upgrades, and release infrastructure; notable bug fixes enhancing stability; cross-repo collaboration and release discipline.

June 2025

41 Commits • 14 Features

Jun 1, 2025

June 2025 performance summary focusing on cross-repo feature deliveries, reliability fixes, and infrastructure improvements that drive business value and stability across Planetarium projects. Key outcomes include robust cross-platform builds, state management enhancements, assets and resources deployments, dependency and configuration upgrades, and improved deployment readiness.

May 2025

35 Commits • 10 Features

May 1, 2025

May 2025 performance summary focusing on business value, key features delivered, major bug fixes, and platform-wide improvements across the Planetarium repos. The month emphasized deployment reliability, cross-platform build readiness, and asset/content enhancements that enable faster releases and better user experience.

April 2025

37 Commits • 11 Features

Apr 1, 2025

April 2025 performance summary: Delivered critical infra and product improvements across planetarium repos, enhancing deployment reliability, backoffice capabilities, and internal service integration. Major efforts focused on backoffice modernization, gateway routing, and hostname management, alongside targeted dependency upgrades, scheduling capabilities, and data handling improvements that collectively reduce risk and accelerate feature delivery for operators and players.

March 2025

50 Commits • 10 Features

Mar 1, 2025

March 2025 performance highlights across Planetarium repos. Business value delivered includes release readiness, data integrity, and infra reliability. Highlights: - NineChronicles.Headless: CI/CD automation and lib9c upgrade to 1.24.0; Docker image builds triggered on feat/get-sheet-hashes. - Memory cache: normalization with NormalizedBytes; SetSheet input normalization; cross-OS/UTF-8 test hardening. - NineChronicles: Sheet data handling improvements; rename of SheetBuckUrl to SheetBucketUrl; dynamic stake reward naming; planet context flexibility; GitHub project automation enhancements. - 9c-infra: internal config consolidation; secret manager integration; backoffice deployment routing changes; world boss deprecation; market REST toggles; IAP integration in EKS; several config fixes. - lib9c: HackAndSlash test item-count accuracy fix.

February 2025

52 Commits • 18 Features

Feb 1, 2025

February 2025 Highlights: Across four repositories (NineChronicles.Headless, 9c-infra, lib9c, and NineChronicles) the month delivered concrete business-value features, stabilized core flows, and progressed deployment readiness for mainnet. Key features include improved transaction precision with gas price handling and fixed-decimal fungible asset value input, state compression for IValue serialization to DeflateStream, arena/network readiness with Odin/Heimdall integration and new REST/GraphQL endpoints, direct sheet synchronization via remote S3 to accelerate refreshes and reduce RPC load, and a World Boss contribution tracking and rewards framework enabling end-to-end participation and reward flows. Notable bug work included targeted reversions and fixes (tracker renaming revert, removing preview net revert, fix reset bridge logic, host name corrections, and test alignment improvements), plus CI/test allowlist updates and domain-specific tweaks (arena fee validation and test expectations). The month closed with enhanced deployment readiness (network GraphQL URL configuration and Uvicorn deployment options) and performance improvements (RPC state decompression and robust sheet-loading with concurrency). Overall impact: improved transaction accuracy, faster content refreshes, more reliable data flows, and clearer deployment pathways—supporting product growth and ecosystem features. Technologies/skills demonstrated: C#/.NET, DeflateStream compression, UniTask concurrency (WhenAll), ConcurrentDictionary usage, S3-based asset delivery, REST/GraphQL API design, and cloud/deployment tooling (Uvicorn, network configuration).

January 2025

65 Commits • 26 Features

Jan 1, 2025

Summary for January 2025: Focused on reducing production surface area, stabilizing deployments, and strengthening CI/CD/QA processes. Delivered infrastructure deprecations, feature toggles, image upgrades, preview network controls, and CI/CD automation improvements across planetarium/9c-infra, NineChronicles, NineChronicles.Headless, and lib9c. These efforts reduced blast radius, improved deployment consistency, and accelerated safe testing and release cycles, delivering measurable business value such as lower operational costs, fewer production incidents, and faster feedback loops for developers.

December 2024

29 Commits • 10 Features

Dec 1, 2024

December 2024 performance summary for Planetarium codebase across lib9c, NineChronicles.Headless, 9c-infra, and NineChronicles. Delivered business-impacting features, improved data integrity and deployment reliability, expanded test coverage, and streamlined collaboration via code refactors and migration-ready changes.

November 2024

26 Commits • 11 Features

Nov 1, 2024

November 2024 (2024-11) delivered substantial deployment improvements, feature enhancements, and robustness fixes across the Planetarium suite. Key outcomes include updated service image tagging for Arena, World Boss, and Patrol Reward services; configurable starting Gold; improved pledge flow and guild migration; robust tests and refactors around buffs/debuffs, damage reduction, and patrol rewards; plus build stabilization and genesis data enhancements across NineChronicles projects. These changes advance deployment reliability, game economy correctness, and onboarding of new content with safer migrations.

October 2024

2 Commits • 2 Features

Oct 1, 2024

October 2024: Delivered two infrastructure-focused features in planetarium/9c-infra, enabling multi-planet support and keeping deployments current. Key outcomes: World Boss now supports planet_id for per-planet configurations; Arena Service deployment upgraded to the latest image. No major bugs fixed this month. Business impact: expanded cross-planet capabilities, safer upgrade paths, and more reliable deployments. Technologies/skills demonstrated: Kubernetes deployment, container image tagging/versioning, and infrastructure configuration management.

Activity

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Quality Metrics

Correctness93.4%
Maintainability91.8%
Architecture90.4%
Performance88.0%
AI Usage23.8%

Skills & Technologies

Programming Languages

AssetBashBinaryC#C++CSVDockerfileGitGoGradle

Technical Skills

3D ModelingAPI ConfigurationAPI DesignAPI DevelopmentAPI IntegrationAPI ManagementAPI RefactoringAPI developmentAPI integrationAPI managementAWSAWS S3Action HandlingAction ImplementationAction System

Repositories Contributed To

4 repos

Overview of all repositories you've contributed to across your timeline

planetarium/9c-infra

Oct 2024 Jul 2026
22 Months active

Languages Used

YAMLyamlshellJSONGoGraphQLHCLMakefile

Technical Skills

Configuration ManagementDevOpsKubernetesInfrastructure as CodeCI/CDGitHub Actions

planetarium/NineChronicles

Nov 2024 Oct 2025
12 Months active

Languages Used

C#JSONMarkdownGraphQLJavaScriptShellYAMLN/A

Technical Skills

API IntegrationAPI RefactoringAsset ManagementBackend DevelopmentBackend IntegrationBlockchain Development

planetarium/lib9c

Nov 2024 Oct 2025
12 Months active

Languages Used

C#JavaScriptTypeScriptCSVXMLGitUnity Meta

Technical Skills

Backend DevelopmentC#CSV ParsingCode CleanupCodebase MaintenanceData Structures

planetarium/NineChronicles.Headless

Nov 2024 May 2026
17 Months active

Languages Used

C#XMLYAMLNoneUnknownDockerfileJSONShell

Technical Skills

Backend DevelopmentBuild ManagementCode Style ConfigurationConfiguration ManagementDependency ManagementProject Configuration