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Release v0.9.0 ​

Architecture Overhaul - Config & Provider Refactoring + CI Mode + Validation ​

A major internal refactoring release that restructures the configuration system, LLM provider architecture, and error handling, while adding CI mode support, configuration validation, and security audit CI.

Added ​

CI Mode Support

  • New environment variables for CI/CD pipelines: GCOP_CI_PROVIDER, GCOP_CI_API_KEY, GCOP_CI_MODEL, GCOP_CI_ENDPOINT
  • When CI=1 is set, automatically creates a "ci" provider with highest priority
  • Enables seamless integration with GitHub Actions, GitLab CI, etc.

Configuration Validation

  • AppConfig::validate() now checks configuration at startup
  • Provider validation: temperature range [0.0, 2.0], non-empty API keys
  • Network validation: non-zero timeout values
  • Invalid configurations now fail fast with clear error messages

CI Security Audit & Code Coverage

  • New audit job using rustsec/audit-check for dependency vulnerability scanning
  • New coverage job using cargo-llvm-cov with Codecov integration

Diff Truncation

  • Automatically truncates diff when exceeding max_diff_size (default 100KB)
  • Displays localized warning when truncation occurs

IssueSeverity Methods

  • New level(), from_config_str(), label(), colored_label() methods on IssueSeverity
  • Simplifies severity filtering and display in review output

Changed ​

Configuration Module Restructured

  • Split monolithic config/mod.rs into structs.rs, loader.rs, global.rs, tests.rs
  • Global config singleton using OnceLock + ArcSwap (load once, share everywhere)
  • Replaced config/schema.rs with config/structs.rs
  • Serde-based defaults replace manual set_default calls

LLM Provider Architecture Refactored

  • Split provider/base.rs into base/ directory: config.rs, response.rs, retry.rs, validation.rs
  • New ApiBackend trait with blanket LLMProvider implementation
  • Providers only implement unique parts (call_api, call_api_streaming)
  • Significantly reduced code duplication across OpenAI/Claude/Ollama providers

Error Handling Improved

  • GcopError::Other replaced with specific variants (GitCommand, InvalidInput)
  • All error suggestions now use i18n keys instead of hardcoded English
  • unreachable! macros replaced with proper error handling in state machine

Environment Variable Naming

  • Nested config env vars now use double underscores: GCOP__LLM__DEFAULT_PROVIDER (was GCOP_LLM_DEFAULT_PROVIDER)
  • Standalone API key env vars (ANTHROPIC_API_KEY, OPENAI_API_KEY) still supported as fallback

Dependencies Optimized

  • Replaced futures with lighter futures-util
  • Removed bytes, edit, toml dependencies
  • reqwest: switched to rustls-no-provider feature with explicit ring crypto provider
  • tokio: narrowed features from full to specific features
  • Release binary now stripped (strip = true)

Removed ​

  • Config field commit.confirm_before_commit: Unused reserved field removed
  • Config field review.show_full_diff: Unused reserved field removed
  • Config field ui.verbose: CLI -v flag is the primary mechanism

Road to 1.0 ​

v0.9.0 is the last pre-1.0 release. If no further breaking changes are needed during the 0.9.x cycle, the next minor release will be v1.0.0, marking API stability.

Upgrade ​

Existing config files remain compatible (unknown fields are silently ignored).

If you use environment variables for configuration, update to double-underscore format:

bash
# Old
GCOP_LLM_DEFAULT_PROVIDER=openai

# New
GCOP__LLM__DEFAULT_PROVIDER=openai
bash
# Homebrew
brew upgrade gcop-rs

# Cargo
cargo install gcop-rs

# pip
pip install --upgrade gcop-rs