* feat: add multi-turn conversation history and tool execution
Major enhancement to the agent loop:
**Multi-turn conversation:**
- Add `ChatMessage` type with system/user/assistant constructors
- Add `chat_with_history` method to Provider trait (default impl
delegates to `chat_with_system` for backward compatibility)
- Implement native `chat_with_history` on OpenRouter, Compatible,
Reliable, and Router providers to send full message history
- Interactive mode now maintains persistent history across turns
**Tool execution:**
- Agent loop now parses `<tool_call>` XML tags from LLM responses
- Executes tools from the registry and feeds results back as
`<tool_result>` messages
- Agentic loop continues until LLM produces final text (no tool calls)
- MAX_TOOL_ITERATIONS (10) safety limit prevents runaway loops
- System prompt includes structured tool-use protocol with JSON schemas
**Types:**
- `ChatMessage`, `ChatResponse`, `ToolCall`, `ToolResultMessage`,
`ConversationMessage` — full conversation modeling types
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* fix: address review comments on multi-turn + tool execution
- Add history sliding window (MAX_HISTORY_MESSAGES=50) to prevent
unbounded conversation history growth in interactive mode
- Add 404→Responses API fallback in compatible.rs chat_with_history,
matching chat_with_system behavior
- Use super::api_error() for error sanitization in compatible.rs
instead of raw error body (prevents secret leakage)
- Add missing operational logs in reliable.rs chat_with_history:
recovery, non-retryable, fallback switch warnings
- Add trim_history tests
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
* fix: address second round of review comments
- Sanitize raw error text in compatible.rs chat_with_system using
sanitize_api_error (prevents leaking secrets in error messages)
- Add chat_with_history to MockProvider in reliable.rs tests so
the retry/fallback path is exercised end-to-end
- Add chat_with_history_retries_then_recovers and
chat_with_history_falls_back tests
- Log warning on malformed <tool_call> JSON instead of silent drop
- Flush stdout after print! in agent_turn so output appears before
tool execution on line-buffered terminals
- Make interactive mode resilient to transient errors (continue
loop instead of terminating session)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
- Warn when fallback providers share the same API key as primary (could fail
if providers require different keys)
- Warm up all providers instead of just the first, continuing on warmup failures
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
- Expand communication style presets (professional, expressive, custom)
- Enrich SOUL.md with human-like tone and emoji-awareness guidance
- Add crash recovery and sub-task scoping guidance to AGENTS.md scaffold
- Add 'Use when / Don't use when' guidance to TOOLS.md and runtime prompts
- Implement memory hygiene system with configurable archiving and retention
- Add MemoryConfig options: hygiene_enabled, archive_after_days, purge_after_days, conversation_retention_days
- Archive old daily memory and session files to archive subdirectories
- Purge old archives and prune stale SQLite conversation rows
- Add comprehensive tests for new features
