Implement boilerplate hardening plan

Implement all 4 items from the boilerplate hardening plan

Multi-phase projects requiring parallel specialist execution and cross-stage coordination.

• · Working directory with source files

• · Execution report with phase results

• · Bash
• · Claude agents
• · Rust compiler

Workflow orchestration environment; required data sources available

• · Agent execution timeout
• · Input file missing or malformed
• · Schema validation failure on agent output
• · Phase dependency not met (prior phase incomplete)

• · Schema-validated agent outputs
• · Explicit phase structure with gating
• · Transient error handling (retry logic)