refactor: rename claude-skill to agent-skill with dual install paths (#294)

* chore: consolidate skill source files to .agents only

* fix: update INSTALLATION.md URLs and paths for agent-skill rename

* fix: correct failed counter logic and extract helper to reduce complexity

Author: theFong

.agents/skills/brev-cli/INSTALLATION.md

@@ -1,15 +1,18 @@
-# Installing the Brev CLI Claude Code Skill
+# Installing the Brev CLI Agent Skill
 
 ## One-Liner Install
 
 ```bash
-curl -fsSL https://raw.githubusercontent.com/brevdev/brev-cli/main/scripts/install-claude-skill.sh | bash
+curl -fsSL https://raw.githubusercontent.com/brevdev/brev-cli/main/scripts/install-agent-skill.sh | bash
 ```
 
 ## What Gets Installed
 
+The skill is installed to both `~/.claude/skills/brev-cli/` and `~/.agents/skills/brev-cli/`:
+
 ```
-~/.claude/skills/brev-cli/
+~/.claude/skills/brev-cli/    (for Claude Code)
+~/.agents/skills/brev-cli/    (for other AI agents)
 ├── SKILL.md                 # Main skill definition
 ├── prompts/
 │   ├── quick-session.md     # Quick GPU session workflow
@@ -28,18 +31,18 @@ curl -fsSL https://raw.githubusercontent.com/brevdev/brev-cli/main/scripts/insta
 
 **Using the standalone script:**
 ```bash
-curl -fsSL https://raw.githubusercontent.com/brevdev/brev-cli/main/scripts/install-claude-skill.sh | bash -s -- --branch my-branch
+curl -fsSL https://raw.githubusercontent.com/brevdev/brev-cli/main/scripts/install-agent-skill.sh | bash -s -- --branch my-branch
 ```
 
 **Using the CLI command:**
 ```bash
-BREV_SKILL_BRANCH=my-branch brev claude-skill
+BREV_SKILL_BRANCH=my-branch brev agent-skill
 ```
 
 ### Uninstall
 
 ```bash
-curl -fsSL https://raw.githubusercontent.com/brevdev/brev-cli/main/scripts/install-claude-skill.sh | bash -s -- --uninstall
+curl -fsSL https://raw.githubusercontent.com/brevdev/brev-cli/main/scripts/install-agent-skill.sh | bash -s -- --uninstall
 ```
 
 ### Manual Installation
@@ -51,17 +54,19 @@ If you prefer to install manually:
 git clone https://github.com/brevdev/brev-cli.git
 cd brev-cli
 
-# Copy skill to Claude directory
-mkdir -p ~/.claude/skills/
-cp -r .claude/skills/brev-cli ~/.claude/skills/
+# Copy skill to both directories
+mkdir -p ~/.claude/skills/ ~/.agents/skills/
+cp -r .agents/skills/brev-cli ~/.claude/skills/
+cp -r .agents/skills/brev-cli ~/.agents/skills/
 ```
 
 ## After Installation
 
-1. **Restart Claude Code** or start a new conversation
+1. **Restart your AI coding agent** or start a new conversation
 2. **Verify installation:**
    ```bash
    ls ~/.claude/skills/brev-cli/
+   ls ~/.agents/skills/brev-cli/
    ```
 3. **Test the skill:**
    - Say "search for A100 GPUs" or
@@ -71,7 +76,7 @@ cp -r .claude/skills/brev-cli ~/.claude/skills/
 
 ### Skill not appearing
 
-- Make sure you restarted Claude Code
+- Make sure you restarted your AI coding agent
 - Check the file exists: `cat ~/.claude/skills/brev-cli/SKILL.md`
 - Verify YAML frontmatter is valid (no tabs, proper formatting)
 
@@ -80,12 +85,13 @@ cp -r .claude/skills/brev-cli ~/.claude/skills/
 ```bash
 # Fix permissions
 chmod -R 755 ~/.claude/skills/brev-cli/
+chmod -R 755 ~/.agents/skills/brev-cli/
 ```
 
 ### Update to latest version
 
 Just run the installer again - it will overwrite existing files:
 
 ```bash
-curl -fsSL https://raw.githubusercontent.com/brevdev/brev-cli/main/scripts/install-claude-skill.sh | bash
+curl -fsSL https://raw.githubusercontent.com/brevdev/brev-cli/main/scripts/install-agent-skill.sh | bash
 ```