Every merged contribution, listed and linked: open-source portfolio

_{The CNCF DevStats score refreshes automatically via GitHub Actions; other figures as of August 2026.}

I focus on correctness in Kubernetes Dynamic Resource Allocation (DRA), particularly quota arithmetic, allocator state management, and device lifecycle handling. A quota-accounting audit began with an int64 overflow in Kueue (#12896). It led to a four-PR Kueue hardening series (#12897, #12909, #12945, and #12954), followed by a corresponding overflow fix in Volcano (#5621).

In Kubernetes core, I identified and fixed five defects in the structured DRA allocator. All five fixes were merged for Kubernetes v1.37 with release notes: prevented cross-driver collisions by scoping shared-counter caches to both driver and pool (#140435); made candidate rejection and backtracking reliably roll back reserved allocator state (#140431); stopped counters from being charged twice for persisted shared-device allocations (#140437); rejected unusable validRange bounds before they could cause divide-by-zero or incorrect validation (#140666); rejected unrepresentable capacity requests instead of accepting allocations that a device could not satisfy (#140442).

I then ran the same variant analysis across vendor DRA drivers. A ResourceClaim can be satisfied by devices from more than one driver, so each driver's kubelet plugin must skip the allocation results it does not own; the reference driver (kubernetes-sigs/dra-example-driver) does exactly that, with a comment explaining why. Several vendors kept that guard on the config path they had copied from the reference but dropped it on their prepare path, so a pod whose claim mixes two drivers has a valid allocation rejected. I reported and fixed it in Google's TPU driver (#25) and IBM's Power driver (#323), and reported the same in IBM's Spyre driver (#59); the SR-IOV driver (#136) drops the equivalent guard on its status-update path. The correct pattern already ships in the reference and still gets dropped when the loop is hand-rolled, so the fix belongs upstream: a shared helper or conformance check in k8s.io/dynamic-resource-allocation rather than more per-driver documentation.

Related upstream fixes include a claim-unprepare device leak in Intel's QAT DRA driver (#74) and a slice-bounds panic in the CNCF Container Device Interface parser (#321). Open work: a nil-dereference fix for KubeVirt's mediated-device builders (#18431) and an unlimited-quota sentinel bug in KAI-Scheduler's parent/child quota validation (#1881). Additional work is tracked through my open pull requests.

My next focus is lowering the barrier from using cloud-native software to contributing upstream: newcomer sessions in Mandarin and Taiwanese (Tâi-gí), together with bilingual contribution walkthroughs based on real review discussions. I completed LFC102: Inclusive Open Source Community Orientation in July 2026.

_{Research assistant at National Yang Ming Chiao Tung University, Taiwan. Raised in a fishing village in Dapeng Bay, Pingtung. I care about making technical communities easier to enter, especially for people who do not start with an established professional network or English-first resources.}