Function call

src/tools/SkillTool/SkillTool.ts:581–842

(
    { skill, args },
    context,
    canUseTool,
    parentMessage,
    onProgress?,
  )

  },

  async call(
    { skill, args },
    context,
    canUseTool,
    parentMessage,
    onProgress?,
  ): Promise<ToolResult<Output>> {
    // At this point, validateInput has already confirmed:
    // - Skill format is valid
    // - Skill exists
    // - Skill can be loaded
    // - Skill doesn't have disableModelInvocation
    // - Skill is a prompt-based skill

    // Skills are just names, with optional arguments
    const trimmed = skill.trim()

    // Remove leading slash if present (for compatibility)
    const commandName = trimmed.startsWith('/') ? trimmed.substring(1) : trimmed

    // Remote canonical skill execution (ant-only experimental). Intercepts
    // `_canonical_<slug>` before local command lookup — loads SKILL.md from
    // AKI/GCS (with local cache), injects content directly as a user message.
    // Remote skills are declarative markdown so no slash-command expansion
    // (no !command substitution, no $ARGUMENTS interpolation) is needed.
    if (
      feature('EXPERIMENTAL_SKILL_SEARCH') &&
      isInternalBuild()
    ) {
      const slug = remoteSkillModules!.stripCanonicalPrefix(commandName)
      if (slug !== null) {
        return executeRemoteSkill(slug, commandName, parentMessage, context)
      }
    }

    const commands = await getAllCommands(context)
    const command = findCommand(commandName, commands)

    // Track skill usage for ranking
    recordSkillUsage(commandName)

    // Check if skill should run as a forked sub-agent
    if (command?.type === 'prompt' && command.context === 'fork') {
      return executeForkedSkill(
        command,
        commandName,
        args,
        context,
        canUseTool,
        parentMessage,
        onProgress,
      )
    }

    // Process the skill with optional args
    const { processPromptSlashCommand } = await import(
      'src/utils/processUserInput/processSlashCommand.js'
    )