# Changelog
All notable changes to this project will be documented in this file.
The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
## [0.21.0] - 2026-02-14 | CC 2.1.42
### Added
- **`:thinking` option** — Idiomatic Elixir API for extended thinking configuration. Supports `:adaptive`, `:disabled`, and `{:enabled, budget_tokens: N}`. Takes precedence over the now-deprecated `:max_thinking_tokens`. ([fa6b39d])
- **`:effort` option** — Control effort level per session or query with `:low`, `:medium`, or `:high`. ([fa6b39d])
- **`caller` field on `ToolUseBlock`** — Parses the optional `caller` metadata from tool use content blocks. ([93de892])
- **`speed` field on `ResultMessage` usage** — Captures the `speed` field from CLI usage data when present. ([93de892])
- **`context_management` on stream events** — `PartialAssistantMessage` now parses `context_management` data from stream events. ([93de892])
- **`:refusal` stop reason** — `ResultMessage` now parses the `"refusal"` stop reason from the CLI. ([a7a7cfc])
### Changed
- **Bundled CLI version bumped to 2.1.42** ([789a813])
- **`:max_thinking_tokens` deprecated** — Still works, but emits a `Logger.warning` directing users to the new `:thinking` option. ([fa6b39d])
- **Hook callback input keys atomized** — Hook callbacks now receive atom-keyed maps (e.g., `%{tool_name: "Bash"}`) instead of string-keyed maps. ([0fcc415])
### Fixed
- **`:setting_sources` documentation** — Corrected example to use strings (`["user", "project", "local"]`) instead of atoms. ([bc2ba7a])
## [0.20.0] - 2026-02-10 | CC 2.1.38
### Added
- **Assigns for in-process MCP tools** — Pass per-session context (e.g., `current_scope` from LiveView) to tools via `:assigns` in the server config. Tools using `execute/2` can read `frame.assigns`. ([a156aae])
- Usage: `mcp_servers: %{"tools" => %{module: MyTools, assigns: %{scope: scope}}}`
- Tools using `execute/1` are unaffected; mix both forms freely in the same server module
### Changed
- **`ClaudeCode.Tool.Server` renamed to `ClaudeCode.MCP.Server`** — Unified MCP namespace so all MCP-related modules live under `ClaudeCode.MCP.*` ([bda2260])
- Update `use ClaudeCode.Tool.Server` → `use ClaudeCode.MCP.Server` in your tool definitions
- The DSL (`tool`, `field`, `execute`) is unchanged
- **Custom tools guide rewritten** — Aligned with official SDK docs structure; in-process tool examples now use the simpler `execute/1` form ([5db0e0a])
### Removed
- **`ClaudeCode.ToolCallback`** — Removed the `:tool_callback` option and `ClaudeCode.ToolCallback` module. Use `:hooks` with `PostToolUse` events instead. See the [Hooks guide](docs/guides/hooks.md) for migration examples.
- **`ClaudeCode.MCP.Config`** — Legacy module for generating temporary MCP config files. The adapter now builds `--mcp-config` JSON inline. ([bda2260])
- **Old `ClaudeCode.MCP.Server` (HTTP GenServer)** — Legacy HTTP-based MCP server wrapper, replaced by the in-process control protocol. ([bda2260])
### Fixed
- **SDK MCP server initialization failures** — Added missing `version` to MCP `serverInfo` response and fixed crash on JSONRPC notifications (no `id` field). In-process tool servers now connect successfully. ([2c746a1])
- **Hermes MCP tool examples in docs** — Corrected to use the actual `schema` + `execute/2` API and `component` registration instead of the non-functional `definition/0` + `call/1` pattern ([dcf2f41])
## [0.19.0] - 2026-02-10 | CC 2.1.38
### Added
#### BEAM-native extensibility
Hooks, permissions, and MCP tools that run inside your application process — no external subprocesses required.
- **In-process hooks and permission control** ([22da55c], [f36b270], [a6034d0], [5faf1f2], [e3bdbc9], [df300a9])
- `ClaudeCode.Hook` behaviour - Define hook modules implementing `call/2` for lifecycle events (PreToolUse, PostToolUse, Stop, UserPromptSubmit, PreCompact, Notification, etc.)
- `:can_use_tool` option - Permission callback (module or 2-arity function) invoked before tool execution; returns `:allow`, `{:deny, reason}`, or `{:allow, updated_input}`
- `:hooks` option - Lifecycle hook configurations as a map of event names to matcher/callback pairs
- **In-process MCP tool servers** ([5c049d4], [2b156c4], [f1a4420])
- `ClaudeCode.Tool.Server` macro - Concise DSL for declaring tools with typed schemas and execute callbacks, generating Hermes `Server.Component` modules
- `ClaudeCode.MCP.Router` - JSONRPC dispatcher that routes `initialize`, `tools/list`, and `tools/call` requests to in-process tool modules
- Auto-detects `Tool.Server` modules in `:mcp_servers` and emits `type: "sdk"` config, routing through the control protocol instead of spawning a subprocess
#### Subagents
- **`ClaudeCode.Agent` struct** - Idiomatic builder for subagent configurations ([1d0188b])
- `ClaudeCode.Agent.new/1` accepts keyword options: `:name`, `:description`, `:prompt`, `:model`, `:tools`
- Pass a list of Agent structs to the `:agents` option instead of raw maps
- Implements `Jason.Encoder` and `JSON.Encoder` protocols; raw map format still supported
#### Session control and new options
- **`ClaudeCode.interrupt/1`** - Fire-and-forget signal to cancel a running generation mid-stream ([5c04495])
- **`:extra_args`** - Pass-through arbitrary CLI flags not covered by named options ([5c04495])
- **`:max_buffer_size`** - Protection against unbounded buffer growth from large JSON responses. Default: 1MB ([5c04495])
## [0.18.0] - 2026-02-10 | CC 2.1.37
### Breaking
- **SDK bundles its own CLI binary by default** - The SDK now downloads and manages its own Claude CLI in `priv/bin/`, auto-installing on first use. To use a globally installed CLI instead, set `cli_path: :global` or pass an explicit path like `cli_path: "/usr/local/bin/claude"`. The bundled version defaults to the latest CLI version tested with the SDK, configurable via `cli_version`. See `ClaudeCode.Options` for details.
```ex
# config.exs
config :claude_code, cli_path: :global
```
### Added
#### Control protocol
Runtime control of sessions without restarting. See [Sessions — Runtime Control](docs/guides/sessions.md#runtime-control).
- `ClaudeCode.set_model/2` - Change the model mid-conversation ([7ba2007])
- `ClaudeCode.set_permission_mode/2` - Change the permission mode mid-conversation ([7ba2007])
- `ClaudeCode.get_mcp_status/1` - Query MCP server connection status ([7ba2007])
- `ClaudeCode.get_server_info/1` - Get server info cached from handshake ([228c57f])
- `ClaudeCode.rewind_files/2` - Rewind files to a checkpoint. See [File Checkpointing](docs/guides/file-checkpointing.md). ([7ba2007])
- Returns `{:error, :not_supported}` for adapters without control protocol support
- **Initialize handshake** - Adapter sends `initialize` request on startup, transitions through `:initializing` → `:ready`. Agents are now delivered through the handshake (matching the Python SDK) instead of as a CLI flag. See [Subagents](docs/guides/subagents.md). ([228c57f], [2a4473b])
#### New options
- **`:sandbox`** - Sandbox config for bash isolation (map merged into `--settings`). See [Secure Deployment](docs/guides/secure-deployment.md). ([5f48858])
- **`:enable_file_checkpointing`** - Track file changes for rewinding. See [File Checkpointing](docs/guides/file-checkpointing.md). ([5f48858])
- **`:allow_dangerously_skip_permissions`** - Required guard for `permission_mode: :bypass_permissions`. See [Permissions](docs/guides/permissions.md). ([c9dc6fa])
- **`:file`** - File resources (repeatable, format: `file_id:path`) ([d6c1869])
- **`:from_pr`** - Resume session linked to a PR ([d6c1869])
- **`:debug` / `:debug_file`** - Debug mode with optional filter and log file ([d6c1869])
#### Adapter system
Swappable backends for different execution environments.
- **`ClaudeCode.Adapter` behaviour** - 4 callbacks: `start_link/2`, `send_query/4`, `health/1`, `stop/1` ([1582644])
- **Adapter notification helpers** - `notify_message/2`, `notify_done/2`, `notify_error/2`, `notify_status/2` ([1704326])
- **`ClaudeCode.health/1`** - Check adapter health (`:healthy` | `:degraded` | `{:unhealthy, reason}`). See [Hosting](docs/guides/hosting.md). ([383dda6])
#### CLI management
- **`mix claude_code.install`** - Install the bundled CLI binary, auto-updating on version mismatch. ([6e7c837])
- **`mix claude_code.path`** - Print resolved binary path, e.g. `$(mix claude_code.path) /login` ([94b5143])
- **`mix claude_code.uninstall`** - Remove the bundled CLI binary ([6e7c837])
### Changed
- **`:cli_path` resolution modes** - `:bundled` (default), `:global`, or explicit path string. See `ClaudeCode.Options`. ([94b5143])
- **Async adapter provisioning** - `start_link/1` returns immediately; CLI setup runs in the background. Queries queue until ready. ([f1a0875], [91ee60d], [6a60eb4])
- **Schema alignment with CLI v2.1.37** - New fields across message types ([482c603], [42b6c27])
- `AssistantMessage.error` (`:authentication_failed`, `:billing_error`, `:rate_limit`, `:invalid_request`, `:server_error`, `:unknown`)
- `UserMessage.tool_use_result`, `ResultMessage.stop_reason`, `AssistantMessage` usage `inference_geo`
- `SystemMessage` handles all subtypes (init, hook_started, hook_response); `plugins` supports object format
## [0.17.0] 2026-02-01 | CC 2.1.29
### Added
- **`:max_thinking_tokens` option** - Maximum tokens for thinking blocks (integer)
- Available for both session and query options
- Maps to `--max-thinking-tokens` CLI flag
- **`:continue` option** - Continue the most recent conversation in the current directory (boolean)
- Maps to `--continue` CLI flag
- Aligns with Python/TypeScript SDK `continue` option
- **`:plugins` option** - Load custom plugins from local paths (list of paths or maps)
- Accepts `["./my-plugin"]` or `[%{type: :local, path: "./my-plugin"}]`
- Plugin type uses atom `:local` (only supported type currently)
- Maps to multiple `--plugin-dir` CLI flags
- Aligns with Python/TypeScript SDK `plugins` option
- **`:output_format` option** - Structured output format configuration (replaces `:json_schema`)
- Format: `%{type: :json_schema, schema: %{...}}`
- Currently only `:json_schema` type is supported
- Maps to `--json-schema` CLI flag
- Aligns with Python/TypeScript SDK `outputFormat` option
- **`context_management` field in AssistantMessage** - Support for context window management metadata in assistant messages ([f4ea348])
- **CLI installer** - Automatic CLI binary management following phoenixframework/esbuild patterns
- `mix claude_code.install` - Mix task to install CLI with `--version`, `--if-missing`, `--force` flags
- `ClaudeCode.Installer` module for programmatic CLI management
- Uses official Anthropic install scripts (https://claude.ai/install.sh)
- Binary resolution checks: explicit path → bundled → PATH → common locations
- **`:cli_path` option** - Specify a custom path to the Claude CLI binary
- **Configuration options** for CLI management:
- `cli_version` - Version to install (default: SDK's tested version)
- `cli_path` - Explicit path to CLI binary (highest priority)
- `cli_dir` - Directory for downloaded binary (default: priv/bin/)
## [0.16.0] - 2026-01-27
### Added
- **`:env` option** - Pass custom environment variables to the CLI subprocess ([aa2d3eb])
- Merge precedence: system env → user `:env` → SDK vars → `:api_key`
- Useful for MCP tools that need specific env vars or custom PATH configurations
- Aligns with Python SDK's environment handling
## [0.15.0] - 2026-01-26
### Added
- **Session history reading** - Read and parse conversation history from session files ([ad737ea])
- `ClaudeCode.conversation/2` - Read conversation (user/assistant messages) by session ID
- `ClaudeCode.History.list_projects/1` - List all projects with session history
- `ClaudeCode.History.list_sessions/2` - List all sessions for a project
- `ClaudeCode.History.read_session/2` - Read all raw entries from a session (low-level)
- **JSON encoding for all structs** - Implement `Jason.Encoder` and `JSON.Encoder` protocols ([a511d5c])
- All message types: SystemMessage, AssistantMessage, UserMessage, ResultMessage, PartialAssistantMessage, CompactBoundaryMessage
- All content blocks: TextBlock, ThinkingBlock, ToolUseBlock, ToolResultBlock
- Nil values are automatically excluded from encoded output
- **String.Chars for messages and content blocks** - Use `to_string/1` or string interpolation ([b3a9571])
- `TextBlock` - returns the text content
- `ThinkingBlock` - returns the thinking content
- `AssistantMessage` - concatenates all text blocks from the message
- `PartialAssistantMessage` - returns delta text (empty string for non-text deltas)
### Changed
- **Conversation message parsing refactored** - Extracted to dedicated module with improved error logging ([22c381c])
## [0.14.0] - 2026-01-15
### Added
- **`:session_id` option** - Specify a custom UUID as the session ID for conversations ([2f2c919])
- **`:disable_slash_commands` option** - Disable all skills/slash commands ([16f96b4])
- **`:no_session_persistence` option** - Disable session persistence so sessions are not saved to disk ([16f96b4])
- **New permission modes** - `:delegate`, `:dont_ask`, and `:plan` added to `:permission_mode` option ([16f96b4])
- **New usage tracking fields** - `cache_creation`, `service_tier`, `web_fetch_requests`, `cost_usd`, `context_window`, `max_output_tokens` in result and assistant message usage ([bed060b])
- **New system message fields** - `claude_code_version`, `agents`, `skills`, `plugins` for enhanced session metadata ([bed060b])
### Fixed
- **SystemMessage `slash_commands` and `output_style` parsing** - Fields were always empty/default ([bed060b])
- **ResultMessage `model_usage` parsing** - Per-model token counts and costs were always 0/nil ([bed060b])
## [0.13.3] - 2026-01-14
### Changed
- **`ResultMessage` optional fields use sensible defaults** - `model_usage` defaults to `%{}` and `permission_denials` defaults to `[]` instead of `nil` ([cda582b])
### Fixed
- **`ResultMessage.result` is now optional** - Error messages from the CLI may contain an `errors` array instead of a `result` field. The field no longer crashes when nil and displays errors appropriately ([c06e825])
## [0.13.2] - 2026-01-08
### Fixed
- **`ToolResultBlock` content parsing** - When CLI returns content as a list of text blocks, they are now parsed into `TextBlock` structs instead of raw maps ([5361e2d])
## [0.13.1] - 2026-01-07
### Changed
- **Simplified test stub naming** - Default stub name changed from `ClaudeCode.Session` to `ClaudeCode` ([2fd244f])
- Config: `adapter: {ClaudeCode.Test, ClaudeCode}` instead of `{ClaudeCode.Test, ClaudeCode.Session}`
- Stubs: `ClaudeCode.Test.stub(ClaudeCode, fn ...)` instead of `stub(ClaudeCode.Session, fn ...)`
- Custom names still supported for multiple stub behaviors in same test
### Added
- **`tool_result/2` accepts maps** - Maps are automatically JSON-encoded ([6d9fca6])
- Example: `ClaudeCode.Test.tool_result(%{status: "success", data: [1, 2, 3]})`
### Fixed
- **`tool_result` content format** - Content is now `[TextBlock.t()]` instead of plain string ([dfba539])
- Matches MCP `CallToolResult` format where content is an array of content blocks
- Fixes compatibility with code expecting `content: [%{"type" => "text", "text" => ...}]`
## [0.13.0] - 2026-01-07
### Added
- **`ClaudeCode.Test` module** - Req.Test-style test helpers for mocking Claude responses ([9f78103])
- `stub/2` - Register function or static message stubs for test isolation
- `allow/3` - Share stubs with spawned processes for async tests
- `set_mode_to_shared/0` - Enable shared mode for integration tests
- Message helpers: `text/2`, `tool_use/3`, `tool_result/2`, `thinking/2`, `result/2`, `system/1`
- Auto-generates system/result messages, links tool IDs, unifies session IDs
- Uses `NimbleOwnership` for process-based isolation with `async: true` support
- **`ClaudeCode.Test.Factory` module** - Test data generation for all message and content types ([54dcfd7])
- Struct factories: `assistant_message/1`, `user_message/1`, `result_message/1`, `system_message/1`
- Content block factories: `text_block/1`, `tool_use_block/1`, `tool_result_block/1`, `thinking_block/1`
- Stream event factories for partial message testing
- Convenience functions with positional arguments for common cases
- **Testing guide** - Comprehensive documentation for testing ClaudeCode integrations ([7dfe509])
## [0.12.0] - 2026-01-07
### Added
- **New stream helpers** for common use cases ([0775bd4])
- `final_text/1` - Returns only the final result text, simplest way to get Claude's answer
- `collect/1` - Returns structured summary with text, thinking, tool_calls, and result
- `tap/2` - Side-effect function for logging/monitoring without filtering the stream
- `on_tool_use/2` - Callback invoked for each tool use, useful for progress indicators
### Changed
- **`collect/1` returns `tool_calls` instead of `tool_uses`** ([7eebfeb])
- Now returns `{tool_use, tool_result}` tuples pairing each tool invocation with its result
- If a tool use has no matching result, the result will be `nil`
- Migration: Change `summary.tool_uses` to `summary.tool_calls` and update iteration to handle tuples
### Removed
- **`buffered_text/1` stream helper** - Use `final_text/1` or `collect/1` instead ([4a1ee97])
## [0.11.0] - 2026-01-07
### Changed
- **Renamed `StreamEventMessage` to `PartialAssistantMessage`** - Aligns with TypeScript SDK naming (`SDKPartialAssistantMessage`)
- `ClaudeCode.Message.StreamEventMessage` → `ClaudeCode.Message.PartialAssistantMessage`
- The struct still uses `type: :stream_event` to match the wire format
- Helper function renamed: `stream_event?/1` → `partial_assistant_message?/1`
### Added
- **`:fork_session` option** - Create a new session ID when resuming a conversation
- Use with `:resume` to branch a conversation: `start_link(resume: session_id, fork_session: true)`
- Original session continues unchanged, fork gets its own session ID after first query
## [0.9.0] - 2026-01-06
### Changed
- **BREAKING: Simplified public API** - Renamed and reorganized query functions ([e7ca31a])
- `query_stream/3` → `stream/3` - Primary API for session-based streaming queries
- `query/3` (session-based sync) → Removed - Use `stream/3` instead
- `query/2` (new) - One-off convenience function with auto session management
- Migration: Replace `ClaudeCode.query(session, prompt)` with `ClaudeCode.stream(session, prompt) |> Enum.to_list()`
- Migration: Replace `ClaudeCode.query_stream(session, prompt)` with `ClaudeCode.stream(session, prompt)`
### Added
- **Concurrent request queuing** - Multiple concurrent streams on same session are now properly queued and executed sequentially ([e7ca31a])
### Fixed
- **Named process handling** - Stream cleanup now properly handles named processes (atoms, `:via`, `:global` tuples) ([e7ca31a])
## [0.8.1] - 2026-01-06
### Fixed
- **Process cleanup on stop** - Claude subprocess now properly terminates when calling `ClaudeCode.stop/1` ([a560ff1])
## [0.8.0] - 2026-01-06
### Changed
- **BREAKING: Renamed message type modules** - Added "Message" suffix for clarity
- `ClaudeCode.Message.Assistant` → `ClaudeCode.Message.AssistantMessage`
- `ClaudeCode.Message.User` → `ClaudeCode.Message.UserMessage`
- `ClaudeCode.Message.Result` → `ClaudeCode.Message.ResultMessage`
- `ClaudeCode.Message.StreamEvent` → `ClaudeCode.Message.PartialAssistantMessage`
- New `ClaudeCode.Message.SystemMessage` and `ClaudeCode.Message.CompactBoundaryMessage` message types
- **BREAKING: Renamed content block modules** - Added "Block" suffix for consistency
- `ClaudeCode.Content.Text` → `ClaudeCode.Content.TextBlock`
- `ClaudeCode.Content.ToolUse` → `ClaudeCode.Content.ToolUseBlock`
- `ClaudeCode.Content.ToolResult` → `ClaudeCode.Content.ToolResultBlock`
- `ClaudeCode.Content.Thinking` → `ClaudeCode.Content.ThinkingBlock`
### Added
- **New system message fields** - Support for additional Claude Code features
- `:output_style` - Claude's configured output style
- `:slash_commands` - Available slash commands
- `:uuid` - Session UUID
- **Extended message type fields** - Better access to API response metadata
- `AssistantMessage`: `:priority`, `:sequence_id`, `:finalize_stack`
- `ResultMessage`: `:session_id`, `:duration_ms`, `:usage`, `:parent_message_id`, `:sequence_id`
- `UserMessage`: `:priority`, `:sequence_id`, `:finalize_stack`
### Fixed
- **`:mcp_servers` option validation** - Fixed handling of MCP server configurations ([0c7e849])
## [0.7.0] - 2026-01-02
### Added
- **`:strict_mcp_config` option** - Control MCP server loading behavior ([a095516])
- When `true`, ignores global MCP server configurations
- Useful for disabling all MCP tools: `tools: [], strict_mcp_config: true`
- Or using only built-in tools: `tools: :default, strict_mcp_config: true`
### Changed
- **BREAKING: `ClaudeCode.query` now returns full `%Result{}` struct** instead of just text
- Before: `{:ok, "response text"}` or `{:error, {:claude_error, "message"}}`
- After: `{:ok, %ClaudeCode.Message.Result{result: "response text", ...}}` or `{:error, %ClaudeCode.Message.Result{is_error: true, ...}}`
- Provides access to metadata: `session_id`, `is_error`, `subtype`, `duration_ms`, `usage`, etc.
- Migration: Change `{:ok, text}` to `{:ok, result}` and use `result.result` to access the response text
- `Result` implements `String.Chars`, so `IO.puts(result)` prints just the text
### Removed
- **`:input_format` option** - No longer exposed in public API ([c7ebab2])
- **`:output_format` option** - No longer exposed in public API ([c7ebab2])
## [0.6.0] - 2025-12-31
### Added
- **`:mcp_servers` module map format** - Pass Hermes modules with custom environment variables ([63d4b72])
- Simple form: `%{"tools" => MyApp.MCPServer}`
- Extended form with env: `%{"tools" => %{module: MyApp.MCPServer, env: %{"DEBUG" => "1"}}}`
- Custom env is merged with defaults (`MIX_ENV: "prod"`), can override MIX_ENV
- Updated MCP docs to recommend `mcp_servers` as the primary configuration method
- **`:json_schema` option** - JSON Schema for structured output validation ([485513f])
- Accepts a map (auto-encoded to JSON) or pre-encoded JSON string
- Maps to `--json-schema` CLI flag
- **`:max_budget_usd` option** - Maximum dollar amount to spend on API calls ([5bf996a])
- Accepts float or integer values
- Maps to `--max-budget-usd` CLI flag
- **`:tools` option** - Specify available tools from the built-in set ([5bf996a])
- Use `:default` for all tools, `[]` to disable all, or a list of tool names
- Maps to `--tools` CLI flag
- **`:agent` option** - Agent name for the session ([5bf996a])
- Different from `:agents` which defines custom agent configurations
- Maps to `--agent` CLI flag
- **`:betas` option** - Beta headers to include in API requests ([5bf996a])
- Accepts a list of beta feature names
- Maps to `--betas` CLI flag
### Removed
- **`query_async/3`** - Removed push-based async API in favor of `query_stream/3`
- `query_stream/3` provides a more idiomatic Elixir Stream-based API
- For push-based messaging (LiveView, GenServers), wrap `query_stream/3` in a Task
- See Phoenix integration guide for migration examples
- **Advanced Streaming API** - Removed low-level streaming functions
- `receive_messages/2` - Use `query_stream/3` instead
- `receive_response/2` - Use `query_stream/3 |> ClaudeCode.Stream.until_result()` instead
- `interrupt/2` - To cancel, use `Task.shutdown/2` on the consuming task
### Changed
- **`ClaudeCode.Stream`** - Now uses pull-based messaging internally instead of process mailbox
## [0.5.0] - 2025-12-30
### Removed
- **`:permission_handler` option** - Removed unimplemented option from session schema
### Added
- **Persistent streaming mode** - Sessions use bidirectional stdin/stdout communication
- Auto-connect on first query, auto-disconnect on session stop
- Multi-turn conversations without subprocess restarts
- New `:resume` option in `start_link/1` for resuming sessions
- New `ClaudeCode.get_session_id/1` and `ClaudeCode.Input` module
- **Extended thinking support** - `ClaudeCode.Content.Thinking` for reasoning blocks
- Stream utilities: `ClaudeCode.Stream.thinking_content/1`, `ClaudeCode.Stream.thinking_deltas/1`
- `StreamEvent` helpers: `thinking_delta?/1`, `get_thinking/1`
- **MCP servers map option** - `:mcp_servers` accepts inline server configurations
- Supports `stdio`, `sse`, and `http` transport types
- **Character-level streaming** - `include_partial_messages: true` option
- Stream utilities: `ClaudeCode.Stream.text_deltas/1`, `ClaudeCode.Stream.content_deltas/1`
- Enables real-time streaming for LiveView applications
- **Tool callback** - `:tool_callback` option for logging/auditing tool usage
- `ClaudeCode.ToolCallback` module for correlating tool use and results
- **Hermes MCP integration** - Expose Elixir tools to Claude via MCP
- Optional dependency: `{:hermes_mcp, "~> 0.14", optional: true}`
- `ClaudeCode.MCP.Config` for generating MCP configuration
- `ClaudeCode.MCP.Server` for starting Hermes MCP servers
### Changed
- **Minimum Elixir version raised to 1.18**
- `ClaudeCode.Stream.filter_type/2` now supports `:stream_event` and `:text_delta`
## [0.4.0] - 2025-10-02
### Added
- **Custom agents support** - `:agents` option for defining agent configurations
- **Settings options** - `:settings` and `:setting_sources` for team settings
### Changed
- `:api_key` now optional - CLI handles `ANTHROPIC_API_KEY` fallback
### Fixed
- CLI streaming with explicit output-format support
## [0.3.0] - 2025-06-16
### Added
- **`ClaudeCode.Supervisor`** - Production supervision for multiple Claude sessions
- Static named sessions and dynamic session management
- Global, local, and registry-based naming
- OTP supervision with automatic restarts
## [0.2.0] - 2025-06-16
### Added
- `ANTHROPIC_API_KEY` environment variable fallback
### Changed
- **BREAKING:** Renamed API functions:
- `query_sync/3` → `query/3`
- `query/3` → `query_stream/3`
- `start_link/1` options now optional (defaults to `[]`)
## [0.1.0] - 2025-06-16
### Added
- **Complete SDK Implementation (Phases 1-4):**
- Session management with GenServer-based architecture
- Synchronous queries with `query_sync/3` (renamed to `query/3` in later version)
- Streaming queries with native Elixir streams via `query/3` (renamed to `query_stream/3` in later version)
- Async queries with `query_async/3` for manual message handling
- Complete message type parsing (system, assistant, user, result)
- Content block handling (text, tool use, tool result) with proper struct types
- Flattened options API with NimbleOptions validation
- Option precedence system: query > session > app config > defaults
- Application configuration support via `config :claude_code`
- Comprehensive CLI flag mapping for all Claude Code options
- **Core Modules:**
- `ClaudeCode` - Main interface with session management
- `ClaudeCode.Session` - GenServer for CLI subprocess management
- `ClaudeCode.CLI` - Binary detection and command building
- `ClaudeCode.Options` - Options validation and CLI conversion
- `ClaudeCode.Stream` - Stream utilities for real-time processing
- `ClaudeCode.Message` - Unified message parsing
- `ClaudeCode.Content` - Content block parsing
- `ClaudeCode.Types` - Type definitions matching SDK schema
- **Message Type Support:**
- System messages with session initialization
- Assistant messages with nested content structure
- User messages with proper content blocks
- Result messages with error subtypes
- Tool use and tool result content blocks
- **Streaming Features:**
- Native Elixir Stream integration with backpressure handling
- Stream utilities: `text_content/1`, `tool_uses/1`, `filter_type/2`
- Buffered text streaming with `buffered_text/1`
- Concurrent streaming request support
- Proper stream cleanup and error handling
- **Configuration System:**
- 15+ configuration options with full validation
- Support for API key, model, system prompt, allowed tools
- Permission mode options: `:default`, `:accept_edits`, `:bypass_permissions`
- Timeout, max turns, working directory configuration
- Custom permission handler support
- Query-level option overrides
### Implementation Details
- Flattened options API for intuitive configuration
- Updated CLI flag mappings to match latest Claude Code CLI
- Enhanced error handling with proper message subtypes
- Shell wrapper implementation to prevent CLI hanging
- Proper JSON parsing for all message types
- Concurrent query isolation with dedicated ports
- Memory management for long-running sessions
- Session continuity across multiple queries
### Security
- API keys passed via environment variables only
- Shell command injection prevention with proper escaping
- Subprocess isolation with dedicated ports per query
- No sensitive data in command arguments or logs
### Documentation
- Complete module documentation with doctests
- Comprehensive README with installation and usage examples
- Streamlined roadmap focusing on current status and future enhancements
### Testing
- 146+ comprehensive tests covering all functionality
- Unit tests for all modules with mock CLI support
- Integration tests with real CLI when available
- Property-based testing for message parsing
- Stream testing with concurrent scenarios
- Coverage reporting with ExCoveralls
