Add missing Non-Goals and Quality Checklist sections to 8 templates

[Alan-Jowett]

Summary

Fixes #20 — adds missing Non-Goals and Quality Checklist sections to 8 templates that were missing one or both.

Changes

Quality Checklist added to 5 templates

Each checklist is specific to its template's task:

Template	Key checklist items
investigate-bug	Findings cite code evidence, severity justified, root cause identified
investigate-security	Exploit scenarios for High/Critical, CWE identifiers, coverage statement
review-code	Severity ordering, fix suggestions, overall assessment stated
plan-implementation	TASK-IDs unique, dependencies explicit, critical path identified
plan-refactoring	Steps atomic and commitable, verification per step, rollback paths

Non-Goals added to 5 templates

Each non-goals section defines task-appropriate scope boundaries:

Template	Key non-goals
author-requirements-doc	No design, no implementation approach, no test cases
author-design-doc	No requirements generation, no implementation
author-validation-plan	No test execution, no scope expansion
plan-implementation	No implementation, no calendar estimates, no tech choices
plan-refactoring	No redesign, no new features, no assumptions beyond provided code

Validation

tests/validate-manifest.py passes.

[Copilot]

Pull request overview

Adds missing “Non-Goals” and “Quality Checklist” sections to multiple authoring/planning/review templates to standardize scope boundaries and final-output verification, addressing #20.

Changes:

• Added template-specific Quality Checklist sections (e.g., review/investigation/planning templates).
• Added Non-Goals sections to clarify what each template must not do.
• Updated 8 template markdown files to include the missing sections.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
templates/review-code.md	Adds a Quality Checklist for code review outputs.
templates/plan-refactoring.md	Adds Non-Goals and a Quality Checklist for refactoring plans.
templates/plan-implementation.md	Adds Non-Goals and a Quality Checklist for implementation plans.
templates/investigate-security.md	Adds a Quality Checklist for security investigations.
templates/investigate-bug.md	Adds a Quality Checklist for bug investigations.
templates/author-validation-plan.md	Adds Non-Goals to constrain validation plan scope.
templates/author-requirements-doc.md	Adds Non-Goals to constrain requirements doc scope.
templates/author-design-doc.md	Adds Non-Goals to constrain design doc scope.