yoi/.yoi/tickets/00001KXKMX0QM/resolution.md

Agent Skills support を実装・レビュー・merge・検証した。

実装内容:

• first-class Skill schema/types と Workspace HTTP client support を追加。
• Workspace backend に Skill discovery / lint / catalog / detail / activation を追加。
• Workspace API endpoints を追加:
  • GET /api/w/{workspace_id}/skills
  • GET /api/w/{workspace_id}/skills/lint
  • GET /api/w/{workspace_id}/skills/{name}
  • GET /api/w/{workspace_id}/skills/{name}/activate
• yoi-workspace-server skills list|lint|show CLI surface を追加。
• Web Workspace API helpers/types を追加。
• builtin Skill resource resources/skills/agent-skills/SKILL.md を追加。
• Worker Skill activation method を追加し、WorkspaceClient::Http 経由で Skill activation を取得し、SystemItem::SkillActivation を commit し、Skill body を engine history に append するようにした。
• Prompt guidance を更新し、Skills は procedural LLM guidance であり external state authority ではないことを明示。

Skill behavior:

• Workspace Skills are read from .yoi/skills/<skill-name>/SKILL.md。
• Lint validates required name / description, parent-dir match, name length/pattern, description bounds, optional license / compatibility / string-map metadata。
• Unknown frontmatter keys are lint errors。
• Workflow/projection/invocation-shaped keys such as model_invokation, user_invocable, graph, invocation are explicitly rejected with unsupported_workflow_frontmatter_field。
• allowed-tools is parsed/diagnosed as experimental ignored/non-authoritative metadata。
• Builtin and workspace Skills are loaded deterministically; workspace Skills override builtin Skills with path-free provenance。
• Catalog responses contain lightweight metadata only; detail/activation returns full SKILL.md body。
• References/assets/scripts are Skill-relative and non-executable/non-authoritative; no raw absolute paths are exposed。
• No /skill-name syntax, Workflow compatibility path, or Knowledge active support was added。

Review:

• Initial review requested changes for silently accepted unsupported Workflow frontmatter and missing Worker activation/history coverage。
• 4ddfccee fix: reject unsupported skill fields added unsupported-key diagnostics/regression tests and Worker activation/history tests。
• Focused re-review approved with no blockers。
• Non-blocking note: detail/activation for invalid Skills returns not-found while catalog/lint carries diagnostics; acceptable for this initial authority model。

Merge / validation:

• Merge commit: 1611e04d merge: agent skills support。
• Final validation passed:
  • Regression grep for removed Workflow/Knowledge active surfaces。
  • git diff --check
  • cargo test -p yoi-workspace-server --lib
  • cargo test -p worker --lib --tests
  • cargo test -p yoi --tests
  • cd web/workspace && deno task check
  • cd web/workspace && deno task test
  • cargo check -p yoi-workspace-server
  • cargo check -p yoi
  • yoi ticket doctor
  • nix build .#yoi --no-link
• Validation log: /run/user/1000/yoi/yoi-orchestrator/bash-output/agent-skills-final-validation-1784160679.txt

Cleanup:

• Implementation worktree/branch cleanup will be performed after close commit。
• Per user instruction, StopPod is not used。