Skills with an `agent` frontmatter field are intended for a specific
agent. Previously they still appeared in:
- every agent's system prompt (via `buildAvailableSkills`)
- the `skill` tool's `<available_items>` description visible to all agents
This wasted tokens and could mislead agents into attempting calls that
would be rejected at execution time.
Changes:
- `buildAvailableSkills`: new optional `agentName` parameter; when
provided, skills whose `definition.agent` does not match are excluded
- `builtin-agents.ts`: pass per-agent name to `buildAvailableSkills`
for sisyphus, hephaestus, and atlas, so each agent's prompt only
lists the skills it is allowed to use
- `createSkillTool` (`tools.ts`): exclude agent-restricted skills from
both the eager and lazy description builds, keeping the shared tool
description free of skills the current agent cannot access
Execution-time enforcement (throwing on mismatch) is unchanged; this
change adds the earlier, description-level visibility gate.
Tests: new `available-skills.test.ts` (5 cases) + 3 new cases in
`tools.test.ts` covering the description-filter and execute paths.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
- context-info-builder referenced a non-existent /plan command;
now directs users to the Prometheus agent for planning
- skill tool description example referenced 'code-review' which
does not exist; changed to 'review-work' (actual built-in skill)
- skill tool execute path now surfaces the missing host permission
gap so callers understand OpenCode plugin context limits
🤖 Generated with OhMyOpenCode assistance
https://github.com/code-yeongyu/oh-my-opencode
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