feat: ArcheFlow — multi-agent orchestration plugin for Claude Code

Zero-dependency Claude Code plugin using Jungian archetypes as
behavioral protocols for multi-agent orchestration.

- 7 archetypes (Explorer, Creator, Maker, Guardian, Skeptic, Trickster, Sage)
- ArcheHelix: rising PDCA quality spiral with feedback loops
- Shadow detection: automatic dysfunction recognition and correction
- 3 built-in workflows (fast, standard, thorough)
- Autonomous mode: unattended overnight sessions with full visibility
- Custom archetypes and workflows via markdown/YAML
- SessionStart hook for automatic bootstrap
- Examples for feature implementation and security review

examples/custom-workflow.yaml

@@ -0,0 +1,26 @@
+# Example: Custom workflow definition
+# Save as .archeflow/workflows/api-design.yaml in your project
+
+name: api-design
+description: "API-first workflow with contract validation and adversarial testing"
+
+# The ArcheHelix configuration
+archehelix:
+  plan:
+    archetypes: [explorer, creator]
+    parallel: false  # sequential: Explorer feeds Creator
+  do:
+    archetypes: [maker]
+    parallel: false
+  check:
+    archetypes: [guardian, skeptic, trickster]
+    parallel: true   # all reviewers run simultaneously
+  act:
+    exit_when: all_approved
+    max_cycles: 2
+    feedback_format: diff  # pass only the delta between cycles
+
+# Optional: final gate runs once after all cycles pass
+final_gate:
+  archetypes: [sage]
+  description: "Final holistic review before merge"