Implements native Beads templates as an alternative to YAML templates:
- Templates are epics with the "template" label and {{variable}} placeholders
- `bd template list` shows both YAML and Beads templates
- `bd template show <id>` displays template structure and variables
- `bd template instantiate <id> --var key=value` clones subgraph with substitution
Key implementation:
- loadTemplateSubgraph: Recursively loads epic and all descendants
- cloneSubgraph: Creates new issues with ID remapping in a transaction
- extractVariables/substituteVariables: {{name}} pattern handling
Closes bd-r6a.2, bd-r6a.4
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Replaces manual working directory save/restore patterns
with Go's built-in `t.Chdir()` helper across 23 test files.
The manual pattern involved calling `os.Getwd()` to save
the original directory, using `defer os.Chdir(origWd)` for
restoration, and manually handling errors during directory
changes. This boilerplate has been replaced with single
`t.Chdir(path)` calls that handle cleanup automatically.
The `t.Chdir()` method automatically restores the working
directory when the test completes, eliminating the need for
manual defer statements and error handling.
Total:
~75 instances replaced (assuming Claude's math is right)
Co-authored-by: Claude <noreply@anthropic.com>
