Function applySkillImprovement

src/utils/hooks/skillImprovement.ts:188–267

(
  skillName: string,
  updates: SkillUpdate[],
)

 * Fire-and-forget — does not block the main conversation.
 */
export async function applySkillImprovement(
  skillName: string,
  updates: SkillUpdate[],
): Promise<void> {
  if (!skillName) return

  const { join } = await import('path')
  const fs = await import('fs/promises')

  // Skills live at .claude/skills/<name>/SKILL.md relative to CWD
  const filePath = join(getCwd(), '.claude', 'skills', skillName, 'SKILL.md')

  let currentContent: string
  try {
    currentContent = await fs.readFile(filePath, 'utf-8')
  } catch {
    logError(
      new Error(`Failed to read skill file for improvement: ${filePath}`),
    )
    return
  }

  const updateList = updates.map(u => `- ${u.section}: ${u.change}`).join('\n')

  const response = await queryModelWithoutStreaming({
    messages: [
      createUserMessage({
        content: `You are editing a skill definition file. Apply the following improvements to the skill.

<current_skill_file>
${currentContent}
</current_skill_file>

<improvements>
${updateList}
</improvements>

Rules:
- Integrate the improvements naturally into the existing structure
- Preserve frontmatter (--- block) exactly as-is
- Preserve the overall format and style
- Do not remove existing content unless an improvement explicitly replaces it
- Output the complete updated file inside <updated_file> tags`,
      }),
    ],
    systemPrompt: asSystemPrompt([
      'You edit skill definition files to incorporate user preferences. Output only the updated file content.',
    ]),
    thinkingConfig: { type: 'disabled' as const },
    tools: [],
    signal: createAbortController().signal,
    options: {
      getToolPermissionContext: async () => getEmptyToolPermissionContext(),
      model: getSmallFastModel(),
      toolChoice: undefined,
      isNonInteractiveSession: false,
      hasAppendSystemPrompt: false,
      temperatureOverride: 0,