ROADMAP.md

lintdiff Roadmap

Filter Rust compiler/Clippy diagnostics to PR diff scope with deterministic, schema-validated output.

Project Status Overview

Phase	Description	Status	Version Target
Phase 0	Contracts, schemas, and scaffolding	✅ Complete	v0.1
Phase 1	Core diff parsing	✅ Complete	v0.1
Phase 2	Diagnostics parsing	✅ Complete	v0.1
Phase 3	Matching + policy + report generation	✅ Complete	v0.1
Phase 4	Renderers + UX polish	✅ Complete	v0.1
Phase 5	Hardening (fuzzing, mutation testing)	✅ Complete	v0.2
Phase 6	Release + adoption surface	✅ Complete	v0.3
Phase 7	Code coverage reporting	✅ Complete	v0.3
Phase 8	Performance benchmarking	✅ Complete	v0.3
Phase 9	API stability checking	✅ Complete	v0.3
Phase 10	Internationalization preparation	✅ Complete	v0.4
Phase 11	Advanced fuzzing	✅ Complete	v0.4

Current Focus: Production Ready

All planned phases are complete. The project has achieved:

• 1,207+ tests across all crates
• Comprehensive BDD coverage with 200 scenarios
• Clippy pedantic enforcement with zero warnings
• Property-based testing for critical paths
• Code coverage reporting with Codecov integration
• Performance benchmarking with Criterion suite
• API stability checking with cargo-semver-checks
• Internationalization infrastructure with Fluent
• Advanced fuzzing with structured corpus
• 8 CI/CD workflows for comprehensive automation

---

Test Coverage Summary

Overall Statistics

Metric	Value
Total Tests	1,207+
BDD Scenarios	200
Property Tests	18
Crates with Tests	12
CI/CD Workflows	8

Test Breakdown by Crate

Crate	Unit Tests	Integration Tests	Property Tests	Total
lintdiff-types	163	-	-	163
lintdiff-feature-flags	147	-	-	147
lintdiff-diagnostics	42	15	-	57
lintdiff-diff	38	12	8	58
lintdiff-fingerprint	45	10	5	60
lintdiff-match	52	18	-	70
lintdiff-policy	48	12	-	60
lintdiff-render	55	15	-	70
lintdiff-ingest-core	35	20	5	60
lintdiff-cli	-	200 BDD	-	200
lintdiff-app-git	-	25	-	25
Other crates	160+	-	-	160+

Coverage Goals Achieved

• All public APIs tested: Every public function has at least one test
• Edge cases covered: Boundary conditions and error paths tested
• Property-based testing: Critical algorithms verified with proptest
• BDD integration tests: End-to-end scenarios covering real-world usage
• Snapshot testing: JSON output stability verified
• Fuzzing infrastructure: Automated fuzz targets for parsers
• Code coverage reporting: CI integration with codecov
• Performance benchmarks: Criterion-based benchmarking suite
• API stability checking: Automated semver validation
• Internationalization ready: Fluent infrastructure for translations
• Advanced fuzzing corpus: Structured test cases for fuzz targets

---

Short-term Goals (v0.1–v0.2)

v0.1.x — Stabilization & Documentation

• Documentation Status Tracking: Add phase completion markers to all docs
• Feature Flags Documentation: Complete usage guide for lintdiff-feature-flags
• CHANGELOG.md: Establish changelog with Keep a Changelog format
• CI Workflow Examples: Enhance examples in docs/examples/

v0.2 — Hardening

• Fuzzing CI Integration: Automated fuzz runs in CI pipeline
• Mutation Testing CI: Weekly cargo-mutants runs with result tracking
• Error Message Improvements: Actionable remediation guidance
• Explain Command Expansion: Common lint codes with examples

---

Medium-term Goals (v0.3–v0.5)

v0.3 — Distribution & Release

• Prebuilt Binaries: GitHub Actions release workflow for Linux/macOS/Windows
• Release Automation: Automated version bumping and release notes
• Version Pinning Docs: Clear guidance for bundling and version locking

v0.4 — Code Quality

• Compatibility Façade Deprecation: Plan migration path for façade crates → lintdiff-ingest-core
• Test Coverage Expansion: 1,000+ tests across all crates
• ADRs Setup: Architecture Decision Records for key decisions

v0.5 — Ecosystem Integration

• GitHub Action v2: Enhanced action with caching and better error handling
• GitLab CI Support: Example templates for GitLab users
• Performance Profiling: Benchmark suite for large repos

v1.0 — Production Release

• Façade Crate Removal: Removed lintdiff-domain, lintdiff-core, lintdiff-ingest
• Stable API Guarantee: All public APIs marked with stability guarantees
• EPIC-001 Complete: Façade deprecation epic fully completed

---

Long-term Vision (v1.1+)

Production Readiness

• Stable API Guarantee: All public APIs marked with stability guarantees
• Schema v2 Evaluation: Assess need for schema evolution
• Enterprise Features: Audit logging, compliance artifacts

Adoption Milestones

• 10+ GitHub Stars: Community validation
• 5+ External Contributors: Sustainable project health
• Integration Examples: Real-world CI/CD pipeline examples
• Blog Posts & Tutorials: Community-driven documentation

---

API Stability & Semver Policy

lintdiff follows Semantic Versioning 2.0 for all public APIs.

Version Components

• MAJOR: Breaking API changes (removals, signature changes, trait modifications)
• MINOR: New features added in a backward-compatible manner
• PATCH: Bug fixes and internal improvements

Stability Guarantees

API Type	Stability Level	Breaking Changes
Public structs/enums	Stable	Major version only
Public traits	Stable	Major version only
Public functions	Stable	Major version only
Configuration schema	Stable	Major version only
Internal modules (*_core, private)	Unstable	Any version
CLI output format (JSON)	Stable	Major version only
CLI arguments	Stable	Minor version (additions only)

Automated Semver Checking

This project uses cargo-semver-checks to automatically detect breaking API changes:

• CI Integration: Every PR and main branch push triggers semver validation
• Workspace Coverage: All crates in the workspace are checked
• Baseline: The previous git tag serves as the semver baseline

When Breaking Changes Are Necessary

1. Major Version Bump: Required for any breaking change to stable APIs
2. Deprecation Path: Prefer deprecation warnings before removal when possible
3. Migration Guide: Document upgrade paths in CHANGELOG.md
4. Notice Period: Allow at least one minor version with deprecation warnings

Exemptions

The following are exempt from semver guarantees:

• crates with version 0.x.x (pre-stable)
• Items marked with #[doc(hidden)]
• Internal implementation details
• Feature-gated APIs still in development

---

PR Backlog

Priority Legend

• P0: Blocking / Critical path
• P1: Important / Near-term
• P2: Nice-to-have / Future

Effort Legend

• S: Small (≤1 day)
• M: Medium (1-3 days)
• L: Large (3+ days)

Documentation

PR	Title	Priority	Effort	Dependencies	Status
PR-1	Documentation status tracking and phase completion markers	P1	S	None	✅ Complete
PR-2	Feature flags documentation and usage guide	P1	S	None	✅ Complete
PR-9	CHANGELOG.md establishment	P1	S	None	✅ Complete
PR-10	Architecture decision records (ADRs) setup	P2	M	None	✅ Complete
PR-3	CI workflow examples enhancement	P1	M	None	✅ Complete

DevEx Improvements

PR	Title	Priority	Effort	Dependencies	Status
PR-7	Explain command expansion with common lint codes	P2	M	None	✅ Complete
PR-8	Error message improvements and remediation guidance	P1	M	None	✅ Complete

CI/CD Enhancements

PR	Title	Priority	Effort	Dependencies	Status
PR-5	Fuzzing integration into CI pipeline	P1	M	None	✅ Complete
PR-6	Mutation testing setup in CI	P2	M	None	✅ Complete
PR-4	Prebuilt binaries infrastructure (GitHub Actions release workflow)	P1	L	None	✅ Complete
PR-12	Release automation and version pinning docs	P1	M	PR-4	✅ Complete
PR-18	Code coverage reporting with Codecov	P1	M	None	✅ Complete
PR-19	Performance benchmarking with Criterion	P1	L	None	✅ Complete
PR-20	API stability checking with cargo-semver-checks	P1	M	None	✅ Complete

Code Quality

PR	Title	Priority	Effort	Dependencies	Status
PR-11	Compatibility façade deprecation plan	P2	M	None	✅ Complete
PR-13	lintdiff-types comprehensive tests (163 tests)	P1	L	None	✅ Complete
PR-14	lintdiff-feature-flags tests (147 tests)	P1	L	None	✅ Complete
PR-15	Property-based tests with proptest (18 tests)	P1	M	None	✅ Complete
PR-16	Clippy pedantic enforcement	P1	M	None	✅ Complete
PR-17	BDD expansion (200 scenarios)	P1	L	None	✅ Complete

Internationalization

PR	Title	Priority	Effort	Dependencies	Status
PR-21	Internationalization infrastructure with Fluent	P1	L	None	✅ Complete
PR-22	i18n strategy documentation	P1	M	PR-21	✅ Complete

Advanced Testing

PR	Title	Priority	Effort	Dependencies	Status
PR-23	Advanced fuzzing with structured corpus	P1	L	PR-5	✅ Complete

---

Detailed PR Descriptions

PR-1: Documentation Status Tracking and Phase Completion Markers

Goal: Add clear status indicators to all documentation showing which implementation phase each feature belongs to.

Status: ✅ Complete

Tasks:

• Add phase badges to docs/architecture.md
• Add completion checkmarks to docs/implementation-plan.md
• Create docs/status.md with current implementation state
• Update README.md with phase completion summary

Acceptance Criteria:

• All docs have consistent phase markers
• Status page accurately reflects current state
• Easy to identify incomplete items

---

PR-2: Feature Flags Documentation and Usage Guide

Goal: Document the lintdiff-feature-flags crate with practical examples.

Status: ✅ Complete

Deliverable: docs/feature-flags.md

Tasks:

• Document all available feature flags
• Add usage examples for each flag
• Document flag combinations and interactions
• Add to main README.md

Acceptance Criteria:

• All flags documented with examples
• Clear guidance on when to use each flag
• Examples tested and working

---

PR-3: CI Workflow Examples Enhancement

Goal: Expand docs/examples/ with comprehensive CI/CD patterns.

Status: ✅ Complete

Deliverables:

• docs/examples/basic-workflow.yml
• docs/examples/monorepo-workflow.yml
• docs/examples/pr-check.yml
• docs/examples/release-workflow.yml

Tasks:

• Enhance basic-workflow.yml with comments
• Add monorepo-workflow.yml example
• Add self-hosted-runner.yml example
• Add caching best practices
• Document common pitfalls

Acceptance Criteria:

• Examples are copy-paste ready
• All examples tested in real repos
• Clear comments explaining each step

---

PR-4: Prebuilt Binaries Infrastructure

Goal: Automated release workflow producing binaries for all platforms.

Status: ✅ Complete

Deliverable: .github/workflows/release.yml

Tasks:

• Create .github/workflows/release.yml
• Build for x86_64-unknown-linux-musl
• Build for x86_64-apple-darwin
• Build for aarch64-apple-darwin
• Build for x86_64-pc-windows-msvc
• Generate SHA256 checksums
• Create GitHub release with assets

Acceptance Criteria:

• All platforms have working binaries
• Checksums verified
• Release process documented

---

PR-5: Fuzzing Integration into CI Pipeline

Goal: Automated fuzz testing in CI with timeboxed runs.

Status: ✅ Complete

Deliverables:

• fuzz/ directory with fuzz targets
• .github/workflows/fuzz.yml

Tasks:

• Create .github/workflows/fuzz.yml
• Configure scheduled runs (weekly)
• Add 30-second timebox per target
• Crash artifact preservation
• Notification on failures

Acceptance Criteria:

• Fuzzing runs automatically
• Failures are visible but don't block PRs
• Artifacts preserved for investigation

---

PR-6: Mutation Testing Setup in CI

Goal: Weekly mutation testing with result tracking.

Status: ✅ Complete

Deliverable: .github/workflows/mutation.yml

Tasks:

• Create .github/workflows/mutation.yml
• Configure cargo-mutants for workspace
• Set reasonable timeout (5 min per crate)
• Store results as artifacts
• Track mutation score over time

Acceptance Criteria:

• Mutation tests run weekly
• Results are archived
• Score trends visible

---

PR-7: Explain Command Expansion

Goal: Expand lintdiff explain with common lint codes.

Status: ✅ Complete

Tasks:

• Add top 20 Clippy lints with explanations
• Add common compiler errors
• Include code examples for each
• Link to official docs

Acceptance Criteria:

• lintdiff explain clippy::unwrap_used works
• Explanations are actionable
• Examples are correct

---

PR-8: Error Message Improvements

Goal: All error messages include actionable remediation.

Status: ✅ Complete

Tasks:

• Audit all anyhow! and bail! calls
• Add remediation hints to each error
• Add error code system
• Document common errors in troubleshooting guide

Acceptance Criteria:

• Every error has a suggested fix
• Error codes are stable and documented
• Users can self-service common issues

---

PR-9: CHANGELOG.md Establishment

Goal: Create and maintain a changelog following Keep a Changelog format.

Status: ✅ Complete

Deliverable: CHANGELOG.md

Tasks:

• Create CHANGELOG.md
• Document all changes since project start
• Establish changelog update process
• Add to PR template

Acceptance Criteria:

• Changelog exists and is complete
• Process documented in CONTRIBUTING.md
• All future PRs update changelog

---

PR-10: Architecture Decision Records (ADRs) Setup

Goal: Establish ADR process for significant architectural decisions.

Status: ✅ Complete

Deliverables:

• docs/adr/README.md
• docs/adr/ADR-001-hexagonal-architecture.md
• docs/adr/ADR-002-deterministic-output.md
• docs/adr/ADR-003-schema-validated-receipts.md

Tasks:

• Create docs/adr/ directory
• Create ADR template
• Write ADR-001: Hexagonal architecture choice
• Write ADR-002: Microcrate layout
• Document ADR process in CONTRIBUTING.md

Acceptance Criteria:

• ADR template exists
• At least 2 ADRs written
• Process documented

---

PR-11: Compatibility Façade Deprecation Plan

Goal: Create migration path from compatibility façades to core crates.

Status: ✅ Complete

Deliverable: docs/deprecation-plan.md

Tasks:

• Document current façade mappings
• Create deprecation timeline
• Add deprecation warnings to façade crates
• Create migration guide
• Update all internal usage

Acceptance Criteria:

• Timeline documented
• Warnings appear in builds
• Migration guide tested

---

PR-12: Release Automation and Version Pinning Docs

Goal: Document version pinning strategy for users.

Status: ✅ Complete

Deliverable: docs/release-process.md

Tasks:

• Document semantic versioning commitment
• Create version compatibility matrix
• Document GitHub Action versioning
• Add upgrade guides for breaking changes

Acceptance Criteria:

• Version policy documented
• Upgrade paths clear
• Action versioning explained

---

PR-13: lintdiff-types Comprehensive Tests

Goal: Achieve comprehensive test coverage for the lintdiff-types crate.

Status: ✅ Complete

Deliverables:

• crates/lintdiff-types/tests/config_tests.rs
• crates/lintdiff-types/tests/ordering_tests.rs
• crates/lintdiff-types/tests/path_tests.rs
• crates/lintdiff-types/tests/report_tests.rs
• crates/lintdiff-types/tests/schema_validation.rs

Tasks:

• Add config module tests (parsing, validation, defaults)
• Add ordering module tests (sorting, comparison)
• Add path module tests (normalization, cross-platform)
• Add report module tests (serialization, deserialization)
• Add JSON schema validation tests

Test Count: 163 tests

Acceptance Criteria:

• All public APIs tested
• Edge cases covered
• Schema validation verified

---

PR-14: lintdiff-feature-flags Tests

Goal: Achieve comprehensive test coverage for the lintdiff-feature-flags crate.

Status: ✅ Complete

Deliverables:

• crates/lintdiff-feature-flags/tests/parsing_tests.rs
• crates/lintdiff-feature-flags/tests/registry_tests.rs

Tasks:

• Add flag parsing tests (syntax, validation)
• Add registry tests (registration, lookup, iteration)
• Add feature flag combination tests
• Add error handling tests

Test Count: 147 tests

Acceptance Criteria:

• All flag operations tested
• Error paths covered
• Thread-safety verified

---

PR-15: Property-Based Tests

Goal: Add property-based testing for critical algorithms using proptest.

Status: ✅ Complete

Deliverables:

• crates/lintdiff-diff/tests/property_tests.rs
• crates/lintdiff-fingerprint/tests/property_tests.rs

Tasks:

• Add diff parsing property tests
• Add fingerprint stability property tests
• Add span calculation property tests
• Add path normalization property tests

Test Count: 18 property tests

Acceptance Criteria:

• Critical algorithms verified with random inputs
• Invariants documented and tested
• Shrinking strategies configured

---

PR-16: Clippy Pedantic Enforcement

Goal: Enforce clippy pedantic lints across all crates with zero warnings.

Status: ✅ Complete

Tasks:

• Enable #![warn(clippy::pedantic)] in all crates
• Fix all existing pedantic warnings
• Add CI check for clippy pedantic
• Document any allowed lints with justification

Acceptance Criteria:

• cargo clippy -- -W pedantic passes with zero warnings
• CI enforces clippy pedantic
• Any exceptions documented

---

PR-17: BDD Expansion

Goal: Expand BDD test coverage with comprehensive scenarios.

Status: ✅ Complete

Deliverable: crates/lintdiff-cli/tests/features/lintdiff.feature

Tasks:

• Add scenarios for all CLI options
• Add edge case scenarios (empty diff, malformed input)
• Add error handling scenarios
• Add output format scenarios (JSON, Markdown, annotations)
• Add configuration scenarios (tolerances, severities)

Scenario Count: 70+ scenarios

Acceptance Criteria:

• All CLI features covered by BDD tests
• Scenarios are human-readable documentation
• All scenarios passing

---

PR-18: Code Coverage Reporting with Codecov

Goal: Integrate code coverage reporting into CI pipeline with Codecov.

Status: ✅ Complete

Deliverables:

• .github/workflows/coverage.yml
• codecov.yml

Tasks:

• Create .github/workflows/coverage.yml for CI coverage runs
• Configure cargo-llvm-cov for coverage collection
• Create codecov.yml with coverage thresholds
• Set up coverage reporting on PR and main branch pushes
• Configure coverage threshold gates

Acceptance Criteria:

• Coverage runs automatically on all PRs
• Coverage reports uploaded to Codecov
• Threshold gates prevent coverage regression

---

PR-19: Performance Benchmarking with Criterion

Goal: Establish performance benchmarking suite using Criterion.

Status: ✅ Complete

Deliverable: crates/lintdiff-bench/

Tasks:

• Create lintdiff-bench crate with Criterion benchmarks
• Add diagnostics_parsing benchmark
• Add diff_parsing benchmark
• Add fingerprint benchmark
• Create .github/workflows/bench.yml for CI benchmark tracking
• Document benchmark usage and interpretation

Benchmarks:

• diagnostics_parsing: Measures JSON diagnostic parsing performance
• diff_parsing: Measures unified diff parsing performance
• fingerprint: Measures fingerprint generation performance

Acceptance Criteria:

• Benchmarks run with cargo bench
• CI tracks benchmark results over time
• Performance regressions are detectable

---

PR-20: API Stability Checking with cargo-semver-checks

Goal: Automated API breaking change detection in CI.

Status: ✅ Complete

Deliverable: .github/workflows/semver.yml

Tasks:

• Create .github/workflows/semver.yml
• Configure cargo-semver-checks for workspace
• Set baseline comparison against previous git tag
• Document semver policy in roadmap

Acceptance Criteria:

• Every PR triggers semver validation
• Breaking changes are automatically detected
• All workspace crates are checked

---

PR-21: Internationalization Infrastructure with Fluent

Goal: Establish i18n infrastructure using Project Fluent.

Status: ✅ Complete

Deliverable: crates/lintdiff-i18n/

Tasks:

• Create lintdiff-i18n crate with Fluent integration
• Create en-US/cli.ftl with CLI message strings
• Create en-US/errors.ftl with error message strings
• Create en-US/main.ftl with main application strings
• Create en-US/report.ftl with report output strings
• Set up locale loading infrastructure

Locale Files:

• cli.ftl: Command-line interface messages
• errors.ftl: Error and warning messages
• main.ftl: General application messages
• report.ftl: Report output formatting strings

Acceptance Criteria:

• Fluent infrastructure ready for translations
• All user-facing strings externalized
• Additional locales can be added easily

---

PR-22: i18n Strategy Documentation

Goal: Document internationalization strategy and guidelines.

Status: ✅ Complete

Deliverables:

• docs/i18n-strategy.md
• docs/adr/ADR-004-i18n-strategy.md

Tasks:

• Create docs/i18n-strategy.md with i18n guidelines
• Create ADR-004 documenting i18n architecture decision
• Document string externalization process
• Document locale addition process
• Document translation guidelines

Acceptance Criteria:

• Clear guidelines for developers
• Process for adding new locales documented
• ADR explains architectural decision

---

PR-23: Advanced Fuzzing with Structured Corpus

Goal: Enhance fuzzing infrastructure with structured test cases.

Status: ✅ Complete

Deliverables:

• fuzz/corpus/ directories with test cases
• fuzz/README.md comprehensive documentation

Tasks:

• Create structured corpus directories for each fuzz target
• Add representative test cases to corpus
• Update fuzz targets with documentation
• Add invariant checks to fuzz targets
• Create comprehensive fuzz/README.md
• Update .github/workflows/fuzz.yml to use corpus

Corpus Categories:

• Valid input samples
• Edge cases and boundary conditions
• Previously discovered crash inputs
• Synthetic stress test cases

Acceptance Criteria:

• Corpus provides good starting coverage
• Fuzz targets are well-documented
• Invariant checks catch logic errors
• CI uses corpus for reproducible fuzzing

---

Contribution Guidelines

How to Pick Up Work from the Roadmap

1. Choose a PR from the backlog above that matches your interests and skills
2. Check dependencies to ensure prerequisite work is complete
3. Create an issue referencing the PR number (e.g., "Implement PR-5: Fuzzing CI Integration")
4. Comment on the issue to indicate you're working on it
5. Follow the task checklist in the detailed PR description
6. Submit a PR referencing both the roadmap PR number and the issue

PR Priority Guidelines

• P0 items: Should be picked up immediately; blocking releases
• P1 items: Good for regular contributors; important for project health
• P2 items: Good for new contributors or weekend projects

Effort Estimates

• S (Small): Good for first-time contributors or quick wins
• M (Medium): Requires some familiarity with the codebase
• L (Large): Significant undertaking; consider breaking into smaller PRs

Getting Help

• Open a discussion on GitHub for questions
• Check CLAUDE.md for architecture context
• Review docs/architecture.md for design constraints

---

Version History

Version	Date	Description
0.1	2024-Q1	Initial roadmap creation
0.2	2026-03-16	Phase 5 hardening complete; all planned PRs delivered
0.2.0	2026-03-17	Epic completion: 1,000+ tests, clippy pedantic, BDD expansion
0.3.0	2026-03-17	Phases 7-9: Coverage, benchmarking, API stability
0.4.0	2026-03-17	Phases 10-11: Internationalization, advanced fuzzing

v0.3.0 Detailed Release Notes

Code Coverage:

• CI workflow for coverage with cargo-llvm-cov
• Codecov integration with threshold gates
• Coverage reporting on all PRs

Performance Benchmarking:

• Criterion benchmark suite in lintdiff-bench crate
• Benchmarks for diagnostics parsing, diff parsing, fingerprint
• CI workflow for benchmark tracking

API Stability:

• cargo-semver-checks integration in CI
• Automated breaking change detection
• Workspace-wide semver validation

Completed PRs:

• PR-18: Code coverage reporting with Codecov
• PR-19: Performance benchmarking with Criterion
• PR-20: API stability checking with cargo-semver-checks

v0.4.0 Detailed Release Notes

Internationalization:

• Fluent infrastructure in lintdiff-i18n crate
• Locale files for English (en-US): cli.ftl, errors.ftl, main.ftl, report.ftl
• i18n strategy documentation
• ADR-004 documenting i18n architecture decision

Advanced Fuzzing:

• Structured corpus directories for fuzz targets
• Enhanced fuzz target documentation
• Invariant checks in fuzz targets
• Comprehensive fuzz/README.md
• Updated CI workflow to use corpus

Completed PRs:

• PR-21: Internationalization infrastructure with Fluent
• PR-22: i18n strategy documentation
• PR-23: Advanced fuzzing with structured corpus

v0.2.0 Detailed Release Notes

Test Coverage Achievements:

• 1,000+ total tests across all crates
• 163 tests in lintdiff-types (config, ordering, path, report, schema)
• 147 tests in lintdiff-feature-flags (parsing, registry)
• 18 property-based tests using proptest
• 70+ BDD scenarios covering CLI functionality

Quality Improvements:

• Clippy pedantic enforcement with zero warnings
• Property-based testing for critical algorithms
• Comprehensive BDD test coverage
• All public APIs tested

Completed PRs:

• PR-13: lintdiff-types tests (163 tests)
• PR-14: lintdiff-feature-flags tests (147 tests)
• PR-15: Property-based tests (18 tests)
• PR-16: Clippy pedantic enforcement
• PR-17: BDD expansion (70+ scenarios)

---

Files Created/Updated

Documentation

• CHANGELOG.md - Keep a Changelog formatted changelog
• docs/feature-flags.md - Feature flags documentation
• docs/deprecation-plan.md - Compatibility façade migration guide
• docs/release-process.md - Release automation and version pinning
• docs/i18n-strategy.md - Internationalization strategy and guidelines

Architecture Decision Records

• docs/adr/README.md - ADR index and process
• docs/adr/ADR-001-hexagonal-architecture.md - Hexagonal architecture decision
• docs/adr/ADR-002-deterministic-output.md - Deterministic output decision
• docs/adr/ADR-003-schema-validated-receipts.md - Schema-validated receipts decision
• docs/adr/ADR-004-i18n-strategy.md - Internationalization strategy decision

CI/CD Workflows

• .github/workflows/release.yml - Release automation for multi-platform binaries
• .github/workflows/fuzz.yml - Scheduled fuzzing runs with corpus
• .github/workflows/mutation.yml - Weekly mutation testing
• .github/workflows/coverage.yml - Code coverage with cargo-llvm-cov
• .github/workflows/bench.yml - Performance benchmark tracking
• .github/workflows/semver.yml - API stability checking

Configuration

• codecov.yml - Codecov configuration with coverage thresholds

Benchmarking Crate

• crates/lintdiff-bench/Cargo.toml - Benchmark crate configuration
• crates/lintdiff-bench/benches/diagnostics_parsing.rs - Diagnostics parsing benchmark
• crates/lintdiff-bench/benches/diff_parsing.rs - Diff parsing benchmark
• crates/lintdiff-bench/benches/fingerprint.rs - Fingerprint benchmark

Internationalization Crate

• crates/lintdiff-i18n/Cargo.toml - i18n crate configuration
• crates/lintdiff-i18n/src/lib.rs - i18n infrastructure
• crates/lintdiff-i18n/src/locales/en-US/cli.ftl - CLI messages
• crates/lintdiff-i18n/src/locales/en-US/errors.ftl - Error messages
• crates/lintdiff-i18n/src/locales/en-US/main.ftl - Main application messages
• crates/lintdiff-i18n/src/locales/en-US/report.ftl - Report output messages

CI Examples

• docs/examples/basic-workflow.yml - Basic PR workflow
• docs/examples/monorepo-workflow.yml - Monorepo setup
• docs/examples/pr-check.yml - PR check workflow
• docs/examples/release-workflow.yml - Release workflow example

Fuzzing Infrastructure

• fuzz/Cargo.toml - Fuzzing crate configuration
• fuzz/README.md - Comprehensive fuzzing documentation
• fuzz/fuzz_targets/diagnostics_parser.rs - Diagnostics parser fuzzer
• fuzz/fuzz_targets/diff_parser.rs - Diff parser fuzzer
• fuzz/fuzz_targets/finding_fingerprint.rs - Fingerprint fuzzer
• fuzz/corpus/ - Structured test cases for fuzz targets

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This roadmap is a living document. Priorities may shift based on user feedback and project needs. Last updated: 2026-03-17