[caelaxie]

Why

Antigravity loads .antigravity-plugin/plugin.json and ignores a root plugin.json when both exist, causing agy plugin validate to emit a duplicate-manifest warning and agy plugin validate --strict to fail. Keeping author, homepage, repository, license, and keywords only in the ignored root manifest also hid those fields from agy.

What changed

• Merged author, homepage, repository, license, and keywords from plugin.json into .antigravity-plugin/plugin.json and removed the duplicate root plugin.json.
• Updated .github/workflows/ci.yml to run agy plugin validate --strict before and after install and validate .antigravity-plugin/plugin.json as the single manifest.

Scope

Covers plugin manifest consolidation and CI validation. Leaves skill definitions, subagents, playbooks, and helper scripts unchanged.

Blast Radius

Touches .antigravity-plugin/plugin.json, removes plugin.json, and tightens .github/workflows/ci.yml. agents/poteto-agent.md already resolves versions from .antigravity-plugin/plugin.json.

Verification

• agy plugin validate --strict . passed with 0 warnings (61 skills, 2 agents).
• agy plugin install . and agy plugin validate --strict on the installed copy passed with 0 warnings.
• .github/workflows/ci.yml manifest, frontmatter, subagent tool, and playbook/principle index checks passed.

[caelaxie]

portreview: pass, merging.

• minimum changes: manifest-only. author, license, and keywords match upstream pstack/.cursor-plugin/plugin.json verbatim; homepage/repository already pointed at the port. dropping the ignored root plugin.json is the harness-required fix.
• layout/target: no cursor paths or shims added; skills untouched.
• parity: version stays 0.15.36, matches upstream.
• embedded skills: untouched.
• proof: CI Validate plugin green on fef175c, now running agy plugin validate --strict + agy plugin install + strict validate on the installed copy + agy plugin list.
• linkage: no open issue to link.
• not a draft.