Rebuild JAIPilot as a skills-only plugin

[skrcode]

Outcome

Rebuilds JAIPilot as three small Agent Skills for Codex and Claude Code and removes the Java runtime, MCP server, hooks, dashboard, installers, state, Maven project, binary distributions, and legacy evaluations.

Evidence

• git diff --check
• python3 scripts/validate-plugin.py
• all three OpenAI skill validations
• OpenAI plugin validation
• claude plugin validate plugins/jaipilot
• adversarial validator fixtures rejected MCP, Java source, executable payloads, and version drift
• real Codex forward tests on disposable Spring Petclinic clones:
  • review skill found a seeded wrong-field bug and unrelated API; focused/full builds failed for the expected behavior
  • test skill added test-only changes; 6 focused and 80 full tests passed; Person reached 100% line/instruction coverage
  • cleanup skill removed a seeded control-flow detour; 33 focused and 75 full tests passed; worktree returned clean

Size/performance

• plugin: 12 files, 15,054 bytes
• prior v4.0.8 release JAR: 12,357,686 bytes
• reduction: about 99.88%
• validator runs: 0.14, 0.05, 0.05, 0.05, 0.04 seconds (median 0.05, p95 0.14)

Boundary

This is intentionally procedural guidance, not an enforcement runtime. The retired runtime remains available at v4.0.8.