5.9.0

Created Aug 20, 2026Updated Aug 22, 2026Takeshi Takatsudo

Release notes for 5.9.0.

Released: 2026-08-20

Added Codex Resources generation for AGENTS.md, Codex configuration, custom agents, hooks, rules, and skills, with dedicated parsing and rendering for each resource type. (666c12059)
Added the public Codex Resources plugin and wired it through package settings, presets, create-zudo-doc, and generated project configuration. (752a3fe5a, a7fa47906, 5831cd73e)
Added Codex Resources showcase data, navigation, localization, development watching, and complete English and Japanese documentation. (a4dca1e40, 1a2e6d5bc, f1396e7a1)

Added type validation and deterministic fallbacks for malformed skill frontmatter values. (710a1d225)
Made generated Codex Resources frontmatter formatter-stable while preserving YAML string semantics and existing Claude Resources output.

Extracted shared resource-documentation helpers while preserving existing Claude Resources output byte-for-byte. (c9165d5cb)
Expanded generator, scaffold, build, and responsive navigation regression coverage for Codex Resources. (142c11aa4)

Revision History