v0.3.0

What's new in v0.3.0

Phase 2 hardening: multi-provider support (6 LLM providers), session
persistence, context compaction, configurable TUI, and cost tracking.

Added

• 6 LLM providers — OpenAI Chat, OpenAI Responses, Google Gemini, Mistral, OpenRouter, plus existing Anthropic support
• opi-ai: retry/backoff/rate-limit support with configurable strategies
• opi-ai: usage accumulation and cost tracking across turns
• opi-agent: session v1 JSONL storage for conversation persistence
• opi-agent: compaction engine with trigger and hook support
• opi-agent: thinking config passed through to provider requests
• opi-coding-agent: session list/resume/delete CLI flags
• opi-coding-agent: --json NDJSON output mode for non-interactive use
• opi-coding-agent: usage accumulation wired to TUI status bar
• opi-coding-agent: edit tool captures before/after content
• opi-coding-agent: workspace path validation for all tools
• opi-tui: configurable keybindings with TOML parsing
• opi-tui: Theme struct with default and monokai palettes
• opi-tui: DiffView widget for edit/patch visualization

Fixed

• Session runtime tests serialized to avoid env var races

Full Changelog: v0.2.0...v0.3.0