Fn Ime Voice Switch

• Outcome: Review
• Latest audit: Sep 16, 2026 · 9:04 AM UTC
• Version: 0.1.1

Overview

The skill’s stated goal is coherent, but it asks users to grant Hammerspoon broad keyboard/accessibility permissions and install a persistent config whose referenced Lua template is missing from the reviewed artifact.

Install only if you are comfortable granting Hammerspoon Accessibility and Input Monitoring permissions and running a persistent Hammerspoon config. Before enabling it, obtain and inspect the missing templates/init.lua from a trusted source, and avoid replacing an existing ~/.hammerspoon/init.lua without understanding what will change.

A.I.G

Vulnerability Patterns

• Skill Instruction Hijacking: Alters the agent's session goals or safety constraints when the skill loads
• Agent Memory Poisoning: Writes attacker-controlled rules into memory that affect later sessions
• Remote Payload Retrieval and Execution: Fetches external code whose behavior can change after review
• Embedded Malicious Code: Ships malicious scripts inside the skill and executes them locally
• Unauthorized Access and Privilege Escalation: Obtains permissions beyond the task's legitimate needs

SkillSpector

Vulnerability Patterns

• Privilege Escalation: Excessive Permissions, Sudo/Root Execution, Credential Access
• Rogue Agent: Self-Modification, Session Persistence
• Prompt Injection: Instruction Override, Hidden Instructions, Exfiltration Commands
• Data Exfiltration: External Transmission, Env Variable Harvesting, File System Enumeration
• Supply Chain: Unpinned Dependencies, External Script Fetching, Obfuscated Code

Findings (6)

Skill Enumeration

Medium

• Category: Agent Snooping
• Confidence: 85% confidence

Finding

Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.

Content

Scanner excerpt · README.md (reported line 20)May include surrounding context.

方式 1：作为 Claude Code skill 使用（推荐）

bash

mkdir -p ~/.claude/skills/fn-ime-voice-switch
git clone https://github.com/I501579/fn-ime-voice-switch.git /tmp/fn-ime-voice-switch
cp -r /tmp/fn-ime-voice-switch/* ~/.claude/skills/fn-ime-voice-switch/

Session Persistence

Medium

• Category: Rogue Agent
• Confidence: 60% confidence

Finding

Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.

Content

Scanner excerpt · README.md (reported line 20)May include surrounding context.

方式 1：作为 Claude Code skill 使用（推荐）

bash

mkdir -p ~/.claude/skills/fn-ime-voice-switch
git clone https://github.com/I501579/fn-ime-voice-switch.git /tmp/fn-ime-voice-switch
cp -r /tmp/fn-ime-voice-switch/* ~/.claude/skills/fn-ime-voice-switch/

Session Persistence

Medium

• Category: Rogue Agent
• Confidence: 75% confidence

Finding

Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.

Content

Scanner excerpt · README.md (reported line 44)May include surrounding context.

md

2. **微信输入法用户必须先关它的 Fn 快捷键**：微信输入法在系统底层装钩子把 Fn 事件全部吃掉，任何用户态 eventtap 都收不到。搜狗等其他输入法实测不抢，可以跳过这步。

3. **输入法 source ID 别信 `defaults read`**：那份 plist 是缓存，与系统不实时同步，列表里可能根本没有刚装的输入法但实际能用。用 `hs -c "hs.keycodes.methods(true)"` 走系统 API 拿真实可用列表。

## 文件结构

Session Persistence

Medium

• Category: Rogue Agent
• Confidence: 75% confidence

Finding

Skill establishes unauthorized persistence across sessions via cron jobs, startup scripts, or state files. Session persistence allows an attacker to maintain access beyond the current interaction.

Content

Scanner excerpt · SKILL.md (reported line 102)May include surrounding context.

md

2. **微信输入法用户必须先关它的 Fn 快捷键**：微信输入法在系统底层装钩子把 Fn 事件全部吃掉，任何用户态 eventtap 都收不到。搜狗等其他输入法实测不抢，可以跳过这步。

3. **输入法 source ID 别信 `defaults read`**：那份 plist 是缓存，与系统不实时同步，列表里可能根本没有刚装的输入法但实际能用。用 `hs -c "hs.keycodes.methods(true)"` 走系统 API 拿真实可用列表。

## 文件结构

Sudo/Root Execution

Medium

• Category: Privilege Escalation
• Confidence: 70% confidence

Finding

Commands invoke sudo or root privileges. Verify this elevated access is necessary and justified.

Content

Scanner excerpt · SKILL.md (reported line 56)May include surrounding context.

open ~/Applications/Hammerspoon.app

text

说明：`--appdir=$HOME/Applications` 把 app 装到用户目录。brew cask 默认要 sudo 拷到 `/Applications`，没法弹密码的环境会失败。装到 `~/Applications` 一样能用，菜单栏有图标，brew 一样能升级。

3. **授权 TCC 权限**

Natural-Language Policy Violations

Low

• Category: Not specified by scanner
• Confidence: 87% confidence

Finding

The README instructs users to invoke the skill with Chinese phrases only: "设置 Fn 切换输入法" or "Fn 切到豆包语音". This is a natural-language locale constraint, and the document does not indicate that Chinese is optional or that the skill is intentionally limited to Chinese-speaking users.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.