feat: add --division flag for selective agent installation

[kienbui1995]

Closes #134

What

Adds a --division flag to install.sh so users can install agents from specific divisions only, instead of all 120 agents.

Usage

# Install only engineering agents
./scripts/install.sh --tool claude-code --division engineering

# Install multiple divisions (comma-separated)
./scripts/install.sh --tool copilot --division engineering,design

# Invalid division names are caught with helpful error
./scripts/install.sh --division invalid
# [ERR] Unknown division 'invalid'. Valid: design engineering ...

How It Works

• claude-code/copilot: Filters source directories directly
• cursor/antigravity/gemini-cli/opencode/openclaw: Builds allowed slug set from source files in filtered divisions, then matches integration filenames
• aider/windsurf: Single-file output, division filter not applicable (installs full file)
• No flag = installs all divisions (fully backward compatible)

Test Results

$ ./scripts/install.sh --tool claude-code --division engineering
  Divisions:  engineering
  Claude Code: 16 agents

$ ./scripts/install.sh --tool claude-code --division engineering,design,testing
  Divisions:  engineering design testing
  Claude Code: 32 agents

$ ./scripts/install.sh --tool copilot --division sales
  Divisions:  sales
  Copilot: 8 agents

$ ./scripts/install.sh --tool claude-code
  Claude Code: 120 agents  (no flag = all, backward compatible)

$ ./scripts/install.sh --division fake
  [ERR] Unknown division 'fake'. Valid: design engineering game-development ...

Per-division breakdown (all verified)

Division	Agents
design	8
engineering	16
game-development	19
marketing	18
paid-media	7
sales	8
product	4
project-management	6
testing	8
support	6
spatial-computing	6
specialized	14
Total	120 ✅ matches full install

Changes

• 1 file changed: scripts/install.sh (+84 lines)
• Added --division flag parsing with validation
• Added active_divisions(), slug_allowed() filtering helpers
• Updated all 7 per-tool installers to respect division filter
• Zero changes to existing behavior when flag is not used

[msitarzewski]

Hey @kienbui1995 — love this feature, it's a commonly requested one (see #134). The implementation is clean and backward-compatible.

One thing before we merge: get_field() and slugify() are duplicated from convert.sh. Could you source them from a shared location instead? A small scripts/lib.sh with the common helpers that both scripts source would keep things DRY. Something like:

# scripts/lib.sh
slugify() { ... }
get_field() { ... }
get_body() { ... }

Then both convert.sh and install.sh can . "$SCRIPT_DIR/lib.sh". Keeps maintenance simple as the helper logic evolves.

Otherwise this is good to go!