Epic: Rust skills gap fill from systems programming best practices

[AlexMikhalev]

Context

Gap analysis of existing rust-development and rust-performance skills against the Rust System Programming Best Practices guide (mid-2025 edition, 14 sections).

Full analysis: cto-executive-system/plans/rust-systems-skills-gap-analysis.md

Current Coverage

• Well covered: Project structure, memory/zero-copy, basic async, error handling, performance optimization, unsafe code policy
• Partial: Advanced async (missing Tower/backpressure), testing (missing Miri/fuzzing), build profiles (missing size-opt)
• Gaps: Concurrency primitives, FFI, CI/CD pipeline, production observability

Approach: Extend Existing + Two New Skills

Extend rust-development, rust-performance, and testing with missing sections. Create two new skills for genuinely new cross-cutting capabilities.

Disciplined Engineering Alignment

Every sub-issue includes a V-model phase mapping table showing how the Rust-specific guidance integrates with the disciplined-* skills:

• disciplined-research (Phase 1): Each skill extension specifies what to audit/profile during research
• disciplined-design (Phase 2): Each specifies design-time decisions (e.g., Tower stack, memory ordering rationale, CI gate thresholds)
• disciplined-implementation (Phase 3): Each defines incremental implementation steps
• disciplined-verification (Phase 4): Each maps to verification tools (Miri, TSan, fuzz, benchmarks)
• disciplined-validation (Phase 5): Each defines production-readiness criteria

Cross-references to quality-gate and devops skills are included where applicable.

Sub-issues

• Extend rust-development with advanced async patterns (Tower, CancellationToken, graceful shutdown) #63 Extend rust-development with advanced async patterns (Tower, CancellationToken, graceful shutdown)
• Extend rust-development with FFI and cross-language integration section #64 Extend rust-development with FFI and cross-language integration section
• Extend rust-performance with concurrency patterns (crossbeam, rayon, atomics) #65 Extend rust-performance with concurrency patterns (crossbeam, rayon, atomics)
• Extend rust-performance with build optimization depth (size-opt, feature gates, stripping) #66 Extend rust-performance with build optimization depth (size-opt, feature gates, stripping)
• Extend testing skill with Miri, fuzzing, and sanitizers #67 Extend testing with Miri, fuzzing, and sanitizers
• feat: rust-ci-cd skill -- Rust-specific CI/CD pipeline patterns #68 New skill: rust-ci-cd (CI/CD pipeline patterns)
• feat: rust-observability skill -- tracing, OpenTelemetry, Prometheus for Rust services #69 New skill: rust-observability (tracing, OpenTelemetry, Prometheus)