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Implement the SkillPackager interface with deterministic OCI artifact creation from skill directories. Uses ocispec types from github.com/opencontainers/image-spec for OCI 1.1 compliance. Parses SKILL.md YAML frontmatter for metadata, creates reproducible tar.gz content layers, per-platform OCI configs (ocispec.Image) with skill metadata in labels, manifests (ocispec.Manifest) with annotations, and multi-platform image indexes (ocispec.Index). Key components: - tar.go: Deterministic tar (sorted entries, normalized headers, PAX format) - gzip.go: Deterministic gzip (OS=255, no name/comment, BestCompression) - packager.go: Full packaging pipeline using ocispec types with digest.FromBytes for diff IDs and specs.Versioned for schema version Security: rejects symlinks (files and directories), hardlinks, device entries, path traversal in both filesystem reads and tar extraction. Size limits on decompression and per-file extraction. Resolves: #16 Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
SkillPackagerinterface with deterministic OCI artifact creation from skill directoriestar.gofor reproducible tar archives (sorted entries, normalized headers, PAX format, UID/GID=0)gzip.gofor reproducible gzip compression (OS=255, no name/comment, BestCompression)packager.gowith full packaging pipeline: directory reading, SKILL.md YAML frontmatter parsing, content layer creation, per-platform OCI configs with metadata labels, manifests with annotations, and multi-platform image indexesgopkg.in/yaml.v3from indirect to direct dependency for frontmatter parsingSecurity hardening:
82.6% test coverage with table-driven, parallel tests using testify.
Resolves #16
Test plan
taskpasses (lint + test)task license-checkpasses🤖 Generated with Claude Code