docs(#322): evaluate Honcho memory integration — already implemented

Honcho AI-native memory integration from plastic-labs/hermes-honcho
has been fully ported to main hermes-agent repository.

Status: COMPLETE — no additional implementation needed.

Components:
- plugins/memory/honcho/client.py — config resolution
- plugins/memory/honcho/session.py — session management
- plugins/memory/honcho/__init__.py — MemoryProvider with 4 tools
- plugins/memory/honcho/cli.py — CLI commands
- tests/test_honcho_client_config.py — 7 tests passing

Refs #322

docs/honcho-evaluation-322.md

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+# Honcho Memory Integration Evaluation (#322)
+
+## Source
+plastic-labs/hermes-honcho — full Honcho AI-native memory integration
+
+## Status: ALREADY IMPLEMENTED
+
+The Honcho integration has been fully ported to the main hermes-agent repository.
+
+## Components Found
+
+### 1. Client Configuration (`plugins/memory/honcho/client.py`)
+- `HonchoClientConfig` dataclass with full config resolution
+- Support for profile-scoped config (`$HERMES_HOME/honcho.json`)
+- Global config fallback (`~/.honcho/config.json`)
+- Environment variable fallback (`HONCHO_API_KEY`, `HONCHO_BASE_URL`)
+- Auto-enable when API key is present
+- Host-specific settings with inheritance
+
+### 2. Session Management (`plugins/memory/honcho/session.py`)
+- `HonchoSessionManager` with async prefetch
+- Message caching and sync to Honcho
+- Dialectic query support (peer.chat)
+- Write frequency control (async/turn/session/N-turns)
+- Memory file migration from legacy format
+
+### 3. MemoryProvider Interface (`plugins/memory/honcho/__init__.py`)
+- `HonchoMemoryProvider` implementing `MemoryProvider` ABC
+- 4 tools exposed via tool schemas:
+  - `honcho_profile` — Quick factual snapshot
+  - `honcho_search` — Semantic search (raw excerpts)
+  - `honcho_context` — Dialectic Q&A (synthesized answers)
+  - `honcho_conclude` — Save persistent facts
+- Recall modes: hybrid (default), context, tools
+- First-turn context baking for prompt caching
+- Cron guard (fully inactive in cron context)
+- Lazy session init for tools-only mode
+
+### 4. CLI Integration (`plugins/memory/honcho/cli.py`)
+- `hermes honcho setup` — Configure Honcho
+- `hermes honcho status` — Show config and connection status
+- `hermes honcho sessions` — List session mappings
+- `hermes honcho map <name>` — Map directory to session
+- `hermes honcho peer` — Configure peer names and dialectic settings
+- `hermes honcho mode` — Set memory mode (hybrid/honcho/local)
+
+### 5. Tests
+- `tests/test_honcho_client_config.py` — 7 tests passing
+
+## Configuration
+
+### Option 1: Environment Variables
+```bash
+export HONCHO_API_KEY="your-api-key"
+export HONCHO_BASE_URL="http://localhost:8000"  # For self-hosted
+```
+
+### Option 2: Config File
+Create `~/.hermes/honcho.json`:
+```json
+{
+  "apiKey": "your-api-key",
+  "enabled": true,
+  "recallMode": "hybrid",
+  "writeFrequency": "async",
+  "sessionStrategy": "per-directory"
+}
+```
+
+### Option 3: CLI Setup
+```bash
+hermes honcho setup
+```
+
+## Memory Modes
+
+| Mode | Context Injection | Tools Available | Use Case |
+|------|------------------|-----------------|----------|
+| hybrid | Yes | Yes | Default — auto-inject + on-demand |
+| context | Yes | No | Low-cost — auto-inject only |
+| tools | No | Yes | Full control — agent decides when to query |
+
+## Integration Points
+
+1. **System Prompt**: Honcho context is injected into system prompt on first turn
+2. **Tool Registry**: 4 tools available when recall_mode != "context"
+3. **Session End**: Messages flushed to Honcho on session end
+4. **Cron Guard**: Fully inactive in cron context (no overhead)
+
+## Dependencies
+
+- `honcho-ai` pip package
+- API key from https://app.honcho.dev (or self-hosted instance)
+
+## Decision
+
+**Keep cloud-dependent layer**: Honcho provides cross-session user modeling that complements the local holographic fact_store. The integration is:
+- Well-gated (opt-in, no overhead when disabled)
+- Zero runtime overhead when disabled (cron guard, lazy init)
+- Configurable (multiple recall modes, write frequencies)
+- Compatible with self-hosted instances (HONCHO_BASE_URL)
+
+The integration is production-ready and requires no additional implementation.