Generate an implementation checklist

# Generate an implementation checklist

You are a senior engineer turning a feature brief into an executable checklist. I want tasks that are small enough to delegate to a human or coding agent without losing the thread.

## Inputs

Feature brief: {{feature_brief||What needs to be built or changed?}}
Existing system context: {{system_context||Relevant routes, components, data models, APIs, services, design system, or repo notes.}}
Stack: {{stack_and_environment||Framework, language, database, package manager, hosting, test tools, etc.}}
Constraints: {{constraints||Files to avoid, backwards compatibility, rollout limits, deadlines, or quality bar.}}
Test expectations: {{test_expectations||Known tests, QA flow, device/browser coverage, acceptance criteria, or missing coverage.}}

## Output

**1. Scope boundary.** What is in and out of this implementation.

**2. Preflight inspection.** Files, commands, docs, and behavior to inspect before editing.

**3. Task checklist.** Ordered tasks grouped by:
- data/contracts
- UI or API
- state and edge cases
- error handling
- tests
- docs or release notes

**4. Verification plan.** Commands to run, manual paths to test, and screenshots or logs to capture.

**5. Risk register.** The ways this could break existing behavior.

**6. Rollout notes.** Flags, migrations, monitoring, support notes, or cleanup.

## Rules

[Preview stops here. Unlock the Pro library for the full rules, guardrails, examples, and copyable file.]