Girish Kanjiyani 766f4ee1d8
feat: add GitHub Copilot prompt support
Adds GitHub Copilot VS Code instruction and prompt files for ECC workflows, with VS Code prompt frontmatter/settings aligned to current docs and tests covering the surface.

Co-authored-by: Girish Kanjiyani <girish.kanjiyani5040@gmail.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-05-12 23:00:00 -04:00

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---
agent: agent
description: Clean up dead code, reduce duplication, and simplify structure without changing behavior
---
# Refactor & Cleanup
Improve the internal structure of the selected code without changing its observable behavior. All tests must pass before and after.
## Before Starting
- [ ] Confirm the test suite is passing.
- [ ] Note the current coverage baseline.
- [ ] Identify the scope: single function, file, or module?
## Refactoring Targets
### Dead Code Removal
- Unused variables, imports, functions, and exports
- Commented-out code blocks (delete, don't leave as comments)
- Feature flags that are permanently enabled/disabled
- Unreachable branches
### Duplication Reduction
- Repeated logic that can be extracted into a shared utility
- Copy-pasted blocks differing only in a parameter (extract with that parameter)
- Inline constants that appear in multiple places (extract to named constants)
### Structure Improvements
- Functions over 50 lines → break into smaller, named steps
- Files over 800 lines → extract cohesive sub-modules
- Nesting deeper than 4 levels → extract early-return guards or helper functions
- Mixed concerns in one function → split into focused single-responsibility functions
### Naming
- Rename variables/functions whose names don't match their behavior
- Replace magic numbers and strings with named constants
- Align naming with the domain language used elsewhere in the codebase
## Constraints
- **No behavior changes** — refactoring is purely structural.
- **One concern at a time** — do not mix refactoring with feature work or bug fixes.
- **Keep tests green** — run the suite after each meaningful change.
- **Don't add abstractions preemptively** — extract only what has already proven to be duplicated (rule of three).
## Output
After refactoring, summarize:
- What was removed (dead code, duplication)
- What was extracted (new utilities, constants)
- What was renamed and why
- Coverage before / after (should not decrease)