# Version 1 Implementation Plan

This plan defines the path from MVP to **Version 1 complete**.  
The objective is to deliver the full scoped product with production readiness, while explicitly separating refinements/enhancements into a future document.

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## 0) Plan Governance & Scope Control (Foundation)

**Goal:** Keep execution focused on V1 completion, not optimization/perfection.

### Implementation Steps
1. Create and maintain a **V1 Traceability Matrix**:
   - Requirement ID
   - Current status (`done`, `partial`, `not started`)
   - Owner
   - Validation method
2. Define V1 completion gates:
   - Functional complete
   - Operationally complete
   - Production-ready complete
3. Snapshot the MVP baseline (tag/changelog reference).
4. Create a standing rule: any non-V1 idea is logged to a separate enhancements backlog document (to be named later), not added to active V1 scope unless explicitly approved.

### Deliverables
- `docs/ver1/ver1.md` (this plan)
- V1 traceability artifact (linked from here when created)

### Exit Criteria
- Every in-scope requirement has explicit ownership and status.
- Scope-change process is agreed and followed.

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## 1) Architecture Consolidation

**Goal:** Align implementation with the intended architecture and reduce MVP shortcuts.

### Implementation Steps
1. Compare implemented modules/components with architecture documentation.
2. Identify and classify architectural debt:
   - Temporary coupling
   - Missing interfaces
   - Placeholder services/components
3. Resolve high-risk architectural gaps first.
4. Record key decisions and tradeoffs in ADRs.

### Deliverables
- Updated architecture diagrams and boundaries
- ADR entries for major decisions

### Exit Criteria
- Architecture documentation reflects system reality.
- Critical architecture risks are addressed or scheduled with owners/dates.

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## 2) Error Handling & Reliability Hardening

**Goal:** Ensure predictable, safe behavior under failure conditions.

### Implementation Steps
1. Standardize error taxonomy and envelope format across all layers.
2. Ensure clear distinction between:
   - User-facing errors
   - Internal/system errors
   - Retryable vs non-retryable failures
3. Add resilience controls where needed:
   - Timeouts
   - Retries with backoff
   - Circuit breaking / fallback logic
4. Add failure-path tests for critical workflows.

### Deliverables
- Error code catalog/reference
- Failure mode test coverage for critical paths

### Exit Criteria
- Error behavior is consistent across major flows.
- Known failure scenarios are tested and pass.

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## 3) Functional Completion by Requirement Domain

**Goal:** Complete all V1 functional requirements in a risk-aware order.

### Recommended Order
1. Business-critical end-user flows
2. Data integrity and consistency capabilities
3. Admin/operational controls
4. Lower-priority UX and quality-of-life items that are in V1 scope

### Implementation Steps
For each requirement slice:
1. Finalize contract/schema
2. Implement domain logic
3. Implement persistence/state changes
4. Integrate API/UI
5. Add automated tests
6. Update docs

### Deliverables
- Requirement completion report with validation evidence

### Exit Criteria
- All V1 “must-have” requirements are complete and validated.

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## 4) Data Model, Migration, and Backfill Safety

**Goal:** Ensure data model and migrations are production-safe.

### Implementation Steps
1. Validate schema against final V1 domain needs.
2. Implement forward-safe migrations.
3. Define rollback/mitigation plans for migration failures.
4. Build and verify backfill scripts (if needed).
5. Add migration rehearsal in staging with representative data.

### Deliverables
- Migration runbook
- Backfill verification checklist

### Exit Criteria
- Migration plan validated in staging.
- No unresolved data-loss risk for V1 rollout.

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## 5) Security, Access Control, and Compliance Baseline

**Goal:** Close MVP security gaps and establish V1 baseline controls.

### Implementation Steps
1. Complete authn/authz coverage for all routes/actions.
2. Enforce input validation and output sanitization.
3. Verify secret management and credential rotation process.
4. Add audit logging for sensitive operations.
5. Run dependency/security scanning in CI and remediate findings.

### Deliverables
- Security checklist with status
- Threat/risk update for V1 scope

### Exit Criteria
- No unresolved critical/high vulnerabilities for V1 launch.
- Access control behavior verified by tests.

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## 6) Observability & Operability

**Goal:** Make system behavior observable and supportable in production.

### Implementation Steps
1. Standardize structured logging and correlation IDs.
2. Add core metrics:
   - Latency
   - Throughput
   - Error rates
   - Resource saturation
3. Add tracing for critical request/workflow paths.
4. Define SLOs/SLIs and alert thresholds.
5. Prepare incident response and rollback runbooks.

### Deliverables
- Dashboards and alerts
- Operations runbooks

### Exit Criteria
- Team can detect, triage, and remediate incidents quickly.
- Core production signals are available and reliable.

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## 7) Test Strategy Expansion & Quality Gates

**Goal:** Raise confidence for repeatable, low-risk releases.

### Implementation Steps
1. Expand unit and integration tests across V1 features.
2. Add contract tests between key components/services.
3. Add end-to-end tests for critical user journeys.
4. Add non-functional tests where relevant:
   - Performance/load
   - Soak
   - Failure-injection scenarios
5. Enforce CI quality gates (tests, lint, type checks, security scans).

### Deliverables
- Test matrix with ownership
- CI gate definition and thresholds

### Exit Criteria
- Critical-path regressions are blocked automatically.
- Test coverage and reliability thresholds meet V1 targets.

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## 8) Performance & Scalability Validation

**Goal:** Meet expected V1 performance at projected load.

### Implementation Steps
1. Define performance budgets per key flow.
2. Benchmark current behavior in staging.
3. Optimize bottlenecks (queries, caching, concurrency, etc.).
4. Re-test after each optimization and compare against budget.
5. Document known limits and safe operating bounds.

### Deliverables
- Performance benchmark report
- Optimization log

### Exit Criteria
- V1 performance targets met for expected usage profile.

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## 9) Release Engineering & Environment Readiness

**Goal:** Make deployment repeatable, controlled, and reversible.

### Implementation Steps
1. Harden CI/CD pipeline with clear promotion gates.
2. Ensure config parity and consistency across environments.
3. Define rollout strategy (phased/canary/limited release as applicable).
4. Validate rollback procedures in staging.
5. Produce release checklist and ownership model.

### Deliverables
- Release playbook
- Environment readiness checklist

### Exit Criteria
- Deployment and rollback are rehearsed and reliable.
- Release process is executable without tribal knowledge.

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## 10) Documentation Completion

**Goal:** Ensure V1 can be built, operated, and supported from documentation.

### Implementation Steps
1. Update core project docs to match final V1 behavior:
   - Architecture
   - Error handling
   - Requirements status
   - Index/navigation
   - Intent alignment summary
2. Add operator troubleshooting guides.
3. Add integration/API examples for consumers.
4. Publish changelog/version notes for V1.

### Deliverables
- Updated documentation set for V1
- V1 release notes

### Exit Criteria
- A new team member can run/support the system using docs alone.

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## 11) Final Validation, UAT, and Launch

**Goal:** Confirm readiness and launch V1 safely.

### Implementation Steps
1. Run full-system acceptance validation against the V1 traceability matrix.
2. Conduct stakeholder UAT and capture sign-off.
3. Execute production readiness review.
4. Launch in controlled phases and monitor key signals.

### Deliverables
- UAT/PRR sign-off records
- Launch checklist and monitoring plan

### Exit Criteria
- Stakeholder approval achieved.
- Launch metrics are stable within defined thresholds.

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## 12) Post-Launch Stabilization (30–60 Days)

**Goal:** Consolidate V1 in production before major expansion.

### Implementation Steps
1. Track incidents, defects, and user feedback.
2. Prioritize stabilization fixes with short cycle times.
3. Remove temporary flags/mitigations introduced during launch.
4. Produce post-launch retrospective and handoff to standard roadmap cadence.

### Deliverables
- Stabilization report
- Prioritized backlog update

### Exit Criteria
- Incident/error rates converge to steady-state targets.
- V1 transitions from launch mode to normal operations.

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## Recommended Execution Rhythm

- **Weekly:** Requirement closure + risk review
- **Biweekly:** Release train with quality gates
- **Milestone reviews:** After phases 2, 6, 9, and 11

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## Scope Discipline Rule (V1 Focus)

To preserve delivery focus:
- V1 execution prioritizes completion of scoped requirements.
- Refinements/enhancements are captured in a separate future document and backlog.
- Only explicitly approved scope changes may enter this plan.