Add configurable base branch for repositories

[newhook]

Summary

This PR adds a configurable base branch setting for repositories, removing the hardcoded assumption that all repos use main as their primary branch.

• Adds base_branch field to [repo] section in project config (config.toml)
• Removes --base CLI flag from co work create (now uses project config)
• Updates all fallback defaults to use GetBaseBranch() helper
• Documents the new configuration option in config template

Changes

Configuration (internal/project/config.go):

• Added BaseBranch field to RepoConfig struct
• Added GetBaseBranch() method that returns configured value or "main" as default

Config Template (internal/project/templates/config.tmpl):

• Added documented base_branch option with examples (e.g., "develop", "master")

Work Creation (cmd/work.go):

• Removed --base flag from work create command
• Now reads base branch from project configuration

Task Processing (cmd/task_processing.go):

• Updated fallback to use GetBaseBranch() instead of hardcoded "main"

Control Plane (internal/control/handler_create_worktree.go):

• Updated fallback to use GetBaseBranch()

TUI (internal/tui/tui_plan_work.go):

• Updated to use GetBaseBranch() instead of hardcoded "main"

Work Package (internal/work/work.go):

• Updated CreateWorkAsync fallback to use GetBaseBranch()

Documentation:

• Updated CLAUDE.md and README.md to reflect the configuration-based approach

Issues Resolved

• ac-a3ss: Base Branch Configuration (epic)
  • ac-a3ss.1: Add base_branch to RepoConfig struct
  • ac-a3ss.2: Update config template with base_branch documentation
  • ac-a3ss.3: Remove --base flag from work create CLI
  • ac-a3ss.4: Update TUI to use config base branch
  • ac-a3ss.5: Update fallback defaults to use config
  • ac-a3ss.6: Update documentation to remove --base flag

Usage

To configure a non-main base branch, edit your project's config.toml:

[repo]
type = "github"
source = "org/repo"
path = "main"
base_branch = "develop"  # Add this line

If not specified, defaults to "main" for backwards compatibility.

Testing

• Build passes: go build -o co .
• Tests pass: go test ./...
• Manual verification with existing projects continues to work (defaults to "main")

🤖 Generated with Claude Code