Ln 820 Dependency Optimization Coordinator

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ln-820-dependency-optimization-coordinator

Type: L2 Domain Coordinator Category: 8XX Optimization Parent: ln-700-project-bootstrap

Coordinates dependency upgrades by detecting package managers and delegating to appropriate L3 workers.

Overview

Workflow

Phases: Pre-flight → Detect → Security Audit → Delegate → Collect → Verify → Report

Phase 0: Pre-flight Checks

Verify project state before starting upgrade.

Skip upgrade if uncommitted changes exist. User must commit or stash first.

Phase 1: Detect Package Managers

Detection Rules

Phase 2: Security Audit (Pre-flight)

Security Checks

Release Age Check

Per Renovate best practices: waiting 14 days gives registries time to pull malicious packages.

Phase 3: Delegate to Workers

CRITICAL: All delegations use Agent tool with subagent_type: "general-purpose" and isolation: "worktree" — each worker creates its own branch per shared/references/git_worktree_fallback.md.

Prompt template:

Agent(description: "Upgrade deps via ln-82X",
     prompt: "Execute dependency upgrade worker.

Step 1: Invoke worker:
  Skill(skill: \"ln-82X-{worker}\")

CONTEXT:
{delegationContext}",
     subagent_type: "general-purpose",
     isolation: "worktree")

Anti-Patterns:

• ❌ Direct Skill tool invocation without Agent wrapper
• ❌ Any execution bypassing subagent context isolation

Delegation Context

Each worker receives standardized context:

Worker Selection

Phase 4: Collect Results

Each worker produces an isolated branch. Coordinator aggregates branch reports.

Worker Branches

Result Schema

Phase 5: Aggregate Reports

Each worker verified independently in its branch (build, tests run by worker itself). Coordinator does NOT rerun verification or rollback packages.

On Failure

1. Branch with failing build/tests logged as "failed" in report
2. User reviews failed branch independently

Phase 6: Report Summary

Report Schema

Configuration

Options:
  # Upgrade scope
  upgradeType: major          # major | minor | patch

  # Breaking changes
  allowBreaking: true
  autoMigrate: true           # Apply known migrations

  # Security
  auditLevel: high            # none | low | moderate | high | critical
  minimumReleaseAge: 14       # days, 0 to disable
  blockOnVulnerability: true

  # Scope
  skipDev: false              # Include devDependencies
  skipOptional: true          # Skip optional deps

  # Verification
  testAfterUpgrade: true
  buildAfterUpgrade: true

  # Rollback
  rollbackOnFailure: true

Error Handling

Recoverable Errors

Fatal Errors

References

• breaking_changes_patterns.md
• security_audit_guide.md

TodoWrite format (mandatory):

- Invoke ln-821-npm-upgrader (in_progress)
- Invoke ln-822-nuget-upgrader (pending)
- Invoke ln-823-pip-upgrader (pending)
- Aggregate reports (pending)

Worker Invocation (MANDATORY)

All workers: Invoke via Agent tool with isolation: "worktree" — each worker creates its own branch.

Definition of Done

• Pre-flight checks passed (clean git state)
• All package managers detected from indicator files
• Security audit completed per manager (critical vulns block upgrade)
• Workers delegated with worktree isolation (isolation: "worktree")
• Each worker produces isolated branch, pushed to remote
• Coordinator report aggregates per-worker results (branch, upgrades, status)

Phase 7: Meta-Analysis

MANDATORY READ: Load shared/references/meta_analysis_protocol.md

Skill type: optimization-coordinator. Run after all phases complete. Output to chat using the optimization-coordinator format.

Version: 1.1.0 Last Updated: 2026-01-10