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/feature-implementation.md

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+# Example: Feature Implementation (Standard ArcheHelix)
+
+## Task
+"Add rate limiting to the API authentication endpoint"
+
+## How ArcheFlow Handles It
+
+### Cycle 1
+
+**Plan Phase:**
+1. Explorer researches: finds the auth handler, discovers no existing rate limit middleware, notes the Redis connection already exists, identifies 3 routes that need protection
+2. Creator proposes: use token bucket algorithm via Redis, add middleware at route level, 100 req/min per IP, return 429 with Retry-After header
+
+**Do Phase:**
+3. Maker implements in worktree: writes rate-limit middleware, adds tests (happy path, rate exceeded, Redis down fallback), commits incrementally
+
+**Check Phase (parallel):**
+4. Guardian reviews: APPROVED — finds no security issues, notes Redis fallback behavior is safe
+5. Skeptic challenges: WARNING — "What about distributed deployments with multiple Redis instances?" Suggests adding a note about Redis cluster configuration
+6. Sage reviews: REJECTED — test for Redis-down scenario doesn't actually simulate Redis failure, it mocks the entire middleware
+
+**Act:** Rejected (1 critical quality issue). Feed findings back.
+
+### Cycle 2
+
+**Plan Phase:**
+7. Creator revises: update test strategy to use actual Redis disconnect simulation, add Redis cluster note to README
+
+**Do Phase:**
+8. Maker implements fixes in new worktree: rewrites Redis-down test to kill the connection, adds documentation
+
+**Check Phase:**
+9. Guardian: APPROVED
+10. Skeptic: APPROVED (cluster concern addressed in docs)
+11. Sage: APPROVED (tests now simulate real failure)
+
+**Act:** All approved. Merge.
+
+## Result
+- 4 files changed, +180 -5 lines
+- 8 tests added (including real Redis failure simulation)
+- Rate limiting active on 3 auth routes
+- Documentation updated
+- 2 ArcheHelix cycles, standard workflow