libghostty als zweite Terminal-Engine integriert (Default ghostty, SwiftTerm Fallback)

- vendor/libghostty: vorgebaute macOS-libghostty.a (arm64) + Header + Build-Patches + README
- Sources/CGhostty: C-Modul der libghostty-C-API
- Sources/MiniTerm/Ghostty.swift: GhosttyApp + GhosttySurfaceView (Surface, Input, Größe, Fokus)
- main.swift: Engine-Wahl per Info.plist MTEngine
- Package.swift: CGhostty-Target + Link gegen libghostty + Frameworks
- STATUS.md: Stand, Build-Weg (macOS-15-VM), offene Punkte

vendor/libghostty/include/ghostty/vt.h

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+/**
+ * @file vt.h
+ *
+ * libghostty-vt - Virtual terminal emulator library
+ * 
+ * This library provides functionality for parsing and handling terminal
+ * escape sequences as well as maintaining terminal state such as styles,
+ * cursor position, screen, scrollback, and more.
+ *
+ * WARNING: This is an incomplete, work-in-progress API. It is not yet
+ * stable and is definitely going to change. 
+ */
+
+/**
+ * @mainpage libghostty-vt - Virtual Terminal Emulator Library
+ *
+ * libghostty-vt is a C library which implements a modern terminal emulator,
+ * extracted from the [Ghostty](https://ghostty.org) terminal emulator.
+ *
+ * libghostty-vt contains the logic for handling the core parts of a terminal
+ * emulator: parsing terminal escape sequences, maintaining terminal state,
+ * encoding input events, etc. It can handle scrollback, line wrapping, 
+ * reflow on resize, and more.
+ *
+ * @warning This library is currently in development and the API is not yet stable.
+ * Breaking changes are expected in future versions. Use with caution in production code.
+ *
+ * @section groups_sec API Reference
+ *
+ * The API is organized into the following groups:
+ * - @ref key "Key Encoding" - Encode key events into terminal sequences
+ * - @ref osc "OSC Parser" - Parse OSC (Operating System Command) sequences
+ * - @ref sgr "SGR Parser" - Parse SGR (Select Graphic Rendition) sequences
+ * - @ref paste "Paste Utilities" - Validate paste data safety
+ * - @ref allocator "Memory Management" - Memory management and custom allocators
+ * - @ref wasm "WebAssembly Utilities" - WebAssembly convenience functions
+ *
+ * @section examples_sec Examples
+ *
+ * Complete working examples:
+ * - @ref c-vt/src/main.c - OSC parser example
+ * - @ref c-vt-key-encode/src/main.c - Key encoding example
+ * - @ref c-vt-paste/src/main.c - Paste safety check example
+ * - @ref c-vt-sgr/src/main.c - SGR parser example
+ *
+ */
+
+/** @example c-vt/src/main.c
+ * This example demonstrates how to use the OSC parser to parse an OSC sequence,
+ * extract command information, and retrieve command-specific data like window titles.
+ */
+
+/** @example c-vt-key-encode/src/main.c
+ * This example demonstrates how to use the key encoder to convert key events
+ * into terminal escape sequences using the Kitty keyboard protocol.
+ */
+
+/** @example c-vt-paste/src/main.c
+ * This example demonstrates how to use the paste utilities to check if
+ * paste data is safe before sending it to the terminal.
+ */
+
+/** @example c-vt-sgr/src/main.c
+ * This example demonstrates how to use the SGR parser to parse terminal
+ * styling sequences and extract text attributes like colors and underline styles.
+ */
+
+#ifndef GHOSTTY_VT_H
+#define GHOSTTY_VT_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <ghostty/vt/result.h>
+#include <ghostty/vt/allocator.h>
+#include <ghostty/vt/osc.h>
+#include <ghostty/vt/sgr.h>
+#include <ghostty/vt/key.h>
+#include <ghostty/vt/paste.h>
+#include <ghostty/vt/wasm.h>
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GHOSTTY_VT_H */

vendor/libghostty/include/ghostty/vt/allocator.h

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+/**
+ * @file allocator.h
+ *
+ * Memory management interface for libghostty-vt.
+ */
+
+#ifndef GHOSTTY_VT_ALLOCATOR_H
+#define GHOSTTY_VT_ALLOCATOR_H
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+/** @defgroup allocator Memory Management
+ *
+ * libghostty-vt does require memory allocation for various operations,
+ * but is resilient to allocation failures and will gracefully handle
+ * out-of-memory situations by returning error codes.
+ *
+ * The exact memory management semantics are documented in the relevant
+ * functions and data structures.
+ *
+ * libghostty-vt uses explicit memory allocation via an allocator
+ * interface provided by GhosttyAllocator. The interface is based on the
+ * [Zig](https://ziglang.org) allocator interface, since this has been
+ * shown to be a flexible and powerful interface in practice and enables
+ * a wide variety of allocation strategies.
+ *
+ * **For the common case, you can pass NULL as the allocator for any
+ * function that accepts one,** and libghostty will use a default allocator.
+ * The default allocator will be libc malloc/free if libc is linked. 
+ * Otherwise, a custom allocator is used (currently Zig's SMP allocator)
+ * that doesn't require any external dependencies.
+ *
+ * ## Basic Usage
+ *
+ * For simple use cases, you can ignore this interface entirely by passing NULL
+ * as the allocator parameter to functions that accept one. This will use the
+ * default allocator (typically libc malloc/free, if libc is linked, but
+ * we provide our own default allocator if libc isn't linked).
+ *
+ * To use a custom allocator:
+ * 1. Implement the GhosttyAllocatorVtable function pointers
+ * 2. Create a GhosttyAllocator struct with your vtable and context
+ * 3. Pass the allocator to functions that accept one
+ *
+ * @{
+ */
+
+/**
+ * Function table for custom memory allocator operations.
+ * 
+ * This vtable defines the interface for a custom memory allocator. All
+ * function pointers must be valid and non-NULL.
+ *
+ * @ingroup allocator
+ *
+ * If you're not going to use a custom allocator, you can ignore all of
+ * this. All functions that take an allocator pointer allow NULL to use a
+ * default allocator.
+ *
+ * The interface is based on the Zig allocator interface. I'll say up front
+ * that it is easy to look at this interface and think "wow, this is really
+ * overcomplicated". The reason for this complexity is well thought out by
+ * the Zig folks, and it enables a diverse set of allocation strategies
+ * as shown by the Zig ecosystem. As a consolation, please note that many
+ * of the arguments are only needed for advanced use cases and can be
+ * safely ignored in simple implementations. For example, if you look at 
+ * the Zig implementation of the libc allocator in `lib/std/heap.zig`
+ * (search for CAllocator), you'll see it is very simple.
+ *
+ * We chose to align with the Zig allocator interface because:
+ *
+ *   1. It is a proven interface that serves a wide variety of use cases
+ *      in the real world via the Zig ecosystem. It's shown to work.
+ *
+ *   2. Our core implementation itself is Zig, and this lets us very
+ *      cheaply and easily convert between C and Zig allocators.
+ *
+ * NOTE(mitchellh): In the future, we can have default implementations of
+ * resize/remap and allow those to be null.
+ */
+typedef struct {
+    /**
+     * Return a pointer to `len` bytes with specified `alignment`, or return
+     * `NULL` indicating the allocation failed.
+     *
+     * @param ctx The allocator context
+     * @param len Number of bytes to allocate
+     * @param alignment Required alignment for the allocation. Guaranteed to
+     *   be a power of two between 1 and 16 inclusive.
+     * @param ret_addr First return address of the allocation call stack (0 if not provided)
+     * @return Pointer to allocated memory, or NULL if allocation failed
+     */
+    void* (*alloc)(void *ctx, size_t len, uint8_t alignment, uintptr_t ret_addr);
+    
+    /**
+     * Attempt to expand or shrink memory in place.
+     *
+     * `memory_len` must equal the length requested from the most recent
+     * successful call to `alloc`, `resize`, or `remap`. `alignment` must
+     * equal the same value that was passed as the `alignment` parameter to
+     * the original `alloc` call.
+     *
+     * `new_len` must be greater than zero.
+     *
+     * @param ctx The allocator context
+     * @param memory Pointer to the memory block to resize
+     * @param memory_len Current size of the memory block
+     * @param alignment Alignment (must match original allocation)
+     * @param new_len New requested size
+     * @param ret_addr First return address of the allocation call stack (0 if not provided)
+     * @return true if resize was successful in-place, false if relocation would be required
+     */
+    bool (*resize)(void *ctx, void *memory, size_t memory_len, uint8_t alignment, size_t new_len, uintptr_t ret_addr);
+    
+    /**
+     * Attempt to expand or shrink memory, allowing relocation.
+     *
+     * `memory_len` must equal the length requested from the most recent
+     * successful call to `alloc`, `resize`, or `remap`. `alignment` must
+     * equal the same value that was passed as the `alignment` parameter to
+     * the original `alloc` call.
+     *
+     * A non-`NULL` return value indicates the resize was successful. The
+     * allocation may have same address, or may have been relocated. In either
+     * case, the allocation now has size of `new_len`. A `NULL` return value
+     * indicates that the resize would be equivalent to allocating new memory,
+     * copying the bytes from the old memory, and then freeing the old memory.
+     * In such case, it is more efficient for the caller to perform the copy.
+     *
+     * `new_len` must be greater than zero.
+     *
+     * @param ctx The allocator context
+     * @param memory Pointer to the memory block to remap
+     * @param memory_len Current size of the memory block
+     * @param alignment Alignment (must match original allocation)
+     * @param new_len New requested size
+     * @param ret_addr First return address of the allocation call stack (0 if not provided)
+     * @return Pointer to resized memory (may be relocated), or NULL if manual copy is needed
+     */
+    void* (*remap)(void *ctx, void *memory, size_t memory_len, uint8_t alignment, size_t new_len, uintptr_t ret_addr);
+    
+    /**
+     * Free and invalidate a region of memory.
+     *
+     * `memory_len` must equal the length requested from the most recent
+     * successful call to `alloc`, `resize`, or `remap`. `alignment` must
+     * equal the same value that was passed as the `alignment` parameter to
+     * the original `alloc` call.
+     *
+     * @param ctx The allocator context
+     * @param memory Pointer to the memory block to free
+     * @param memory_len Size of the memory block
+     * @param alignment Alignment (must match original allocation)
+     * @param ret_addr First return address of the allocation call stack (0 if not provided)
+     */
+    void (*free)(void *ctx, void *memory, size_t memory_len, uint8_t alignment, uintptr_t ret_addr);
+} GhosttyAllocatorVtable;
+
+/**
+ * Custom memory allocator.
+ *
+ * For functions that take an allocator pointer, a NULL pointer indicates
+ * that the default allocator should be used. The default allocator will 
+ * be libc malloc/free if we're linking to libc. If libc isn't linked,
+ * a custom allocator is used (currently Zig's SMP allocator).
+ *
+ * @ingroup allocator
+ *
+ * Usage example:
+ * @code
+ * GhosttyAllocator allocator = {
+ *     .vtable = &my_allocator_vtable,
+ *     .ctx = my_allocator_state
+ * };
+ * @endcode
+ */
+typedef struct GhosttyAllocator {
+    /**
+     * Opaque context pointer passed to all vtable functions.
+     * This allows the allocator implementation to maintain state
+     * or reference external resources needed for memory management.
+     */
+    void *ctx;
+
+    /**
+     * Pointer to the allocator's vtable containing function pointers
+     * for memory operations (alloc, resize, remap, free).
+     */
+    const GhosttyAllocatorVtable *vtable;
+} GhosttyAllocator;
+
+/** @} */
+
+#endif /* GHOSTTY_VT_ALLOCATOR_H */

vendor/libghostty/include/ghostty/vt/color.h

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+/**
+ * @file color.h
+ *
+ * Color types and utilities.
+ */
+
+#ifndef GHOSTTY_VT_COLOR_H
+#define GHOSTTY_VT_COLOR_H
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * RGB color value.
+ *
+ * @ingroup sgr
+ */
+typedef struct {
+  uint8_t r; /**< Red component (0-255) */
+  uint8_t g; /**< Green component (0-255) */
+  uint8_t b; /**< Blue component (0-255) */
+} GhosttyColorRgb;
+
+/**
+ * Palette color index (0-255).
+ *
+ * @ingroup sgr
+ */
+typedef uint8_t GhosttyColorPaletteIndex;
+
+/** @addtogroup sgr
+ * @{
+ */
+
+/** Black color (0) @ingroup sgr */
+#define GHOSTTY_COLOR_NAMED_BLACK 0
+/** Red color (1) @ingroup sgr */
+#define GHOSTTY_COLOR_NAMED_RED 1
+/** Green color (2) @ingroup sgr */
+#define GHOSTTY_COLOR_NAMED_GREEN 2
+/** Yellow color (3) @ingroup sgr */
+#define GHOSTTY_COLOR_NAMED_YELLOW 3
+/** Blue color (4) @ingroup sgr */
+#define GHOSTTY_COLOR_NAMED_BLUE 4
+/** Magenta color (5) @ingroup sgr */
+#define GHOSTTY_COLOR_NAMED_MAGENTA 5
+/** Cyan color (6) @ingroup sgr */
+#define GHOSTTY_COLOR_NAMED_CYAN 6
+/** White color (7) @ingroup sgr */
+#define GHOSTTY_COLOR_NAMED_WHITE 7
+/** Bright black color (8) @ingroup sgr */
+#define GHOSTTY_COLOR_NAMED_BRIGHT_BLACK 8
+/** Bright red color (9) @ingroup sgr */
+#define GHOSTTY_COLOR_NAMED_BRIGHT_RED 9
+/** Bright green color (10) @ingroup sgr */
+#define GHOSTTY_COLOR_NAMED_BRIGHT_GREEN 10
+/** Bright yellow color (11) @ingroup sgr */
+#define GHOSTTY_COLOR_NAMED_BRIGHT_YELLOW 11
+/** Bright blue color (12) @ingroup sgr */
+#define GHOSTTY_COLOR_NAMED_BRIGHT_BLUE 12
+/** Bright magenta color (13) @ingroup sgr */
+#define GHOSTTY_COLOR_NAMED_BRIGHT_MAGENTA 13
+/** Bright cyan color (14) @ingroup sgr */
+#define GHOSTTY_COLOR_NAMED_BRIGHT_CYAN 14
+/** Bright white color (15) @ingroup sgr */
+#define GHOSTTY_COLOR_NAMED_BRIGHT_WHITE 15
+
+/** @} */
+
+/**
+ * Get the RGB color components.
+ *
+ * This function extracts the individual red, green, and blue components
+ * from a GhosttyColorRgb value. Primarily useful in WebAssembly environments
+ * where accessing struct fields directly is difficult.
+ *
+ * @param color The RGB color value
+ * @param r Pointer to store the red component (0-255)
+ * @param g Pointer to store the green component (0-255)
+ * @param b Pointer to store the blue component (0-255)
+ *
+ * @ingroup sgr
+ */
+void ghostty_color_rgb_get(GhosttyColorRgb color,
+                           uint8_t* r,
+                           uint8_t* g,
+                           uint8_t* b);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GHOSTTY_VT_COLOR_H */

vendor/libghostty/include/ghostty/vt/key.h

@@ -0,0 +1,80 @@
+/**
+ * @file key.h
+ *
+ * Key encoding module - encode key events into terminal escape sequences.
+ */
+
+#ifndef GHOSTTY_VT_KEY_H
+#define GHOSTTY_VT_KEY_H
+
+/** @defgroup key Key Encoding
+ *
+ * Utilities for encoding key events into terminal escape sequences,
+ * supporting both legacy encoding as well as Kitty Keyboard Protocol.
+ *
+ * ## Basic Usage
+ *
+ * 1. Create an encoder instance with ghostty_key_encoder_new()
+ * 2. Configure encoder options with ghostty_key_encoder_setopt().
+ * 3. For each key event:
+ *    - Create a key event with ghostty_key_event_new()
+ *    - Set event properties (action, key, modifiers, etc.)
+ *    - Encode with ghostty_key_encoder_encode()
+ *    - Free the event with ghostty_key_event_free()
+ *    - Note: You can also reuse the same key event multiple times by
+ *      changing its properties.
+ * 4. Free the encoder with ghostty_key_encoder_free() when done
+ *
+ * ## Example
+ *
+ * @code{.c}
+ * #include <assert.h>
+ * #include <stdio.h>
+ * #include <ghostty/vt.h>
+ * 
+ * int main() {
+ *   // Create encoder
+ *   GhosttyKeyEncoder encoder;
+ *   GhosttyResult result = ghostty_key_encoder_new(NULL, &encoder);
+ *   assert(result == GHOSTTY_SUCCESS);
+ * 
+ *   // Enable Kitty keyboard protocol with all features
+ *   ghostty_key_encoder_setopt(encoder, GHOSTTY_KEY_ENCODER_OPT_KITTY_FLAGS, 
+ *                              &(uint8_t){GHOSTTY_KITTY_KEY_ALL});
+ * 
+ *   // Create and configure key event for Ctrl+C press
+ *   GhosttyKeyEvent event;
+ *   result = ghostty_key_event_new(NULL, &event);
+ *   assert(result == GHOSTTY_SUCCESS);
+ *   ghostty_key_event_set_action(event, GHOSTTY_KEY_ACTION_PRESS);
+ *   ghostty_key_event_set_key(event, GHOSTTY_KEY_C);
+ *   ghostty_key_event_set_mods(event, GHOSTTY_MODS_CTRL);
+ * 
+ *   // Encode the key event
+ *   char buf[128];
+ *   size_t written = 0;
+ *   result = ghostty_key_encoder_encode(encoder, event, buf, sizeof(buf), &written);
+ *   assert(result == GHOSTTY_SUCCESS);
+ * 
+ *   // Use the encoded sequence (e.g., write to terminal)
+ *   fwrite(buf, 1, written, stdout);
+ * 
+ *   // Cleanup
+ *   ghostty_key_event_free(event);
+ *   ghostty_key_encoder_free(encoder);
+ *   return 0;
+ * }
+ * @endcode
+ *
+ * For a complete working example, see example/c-vt-key-encode in the
+ * repository.
+ *
+ * @{
+ */
+
+#include <ghostty/vt/key/event.h>
+#include <ghostty/vt/key/encoder.h>
+
+/** @} */
+
+#endif /* GHOSTTY_VT_KEY_H */

vendor/libghostty/include/ghostty/vt/key/encoder.h

@@ -0,0 +1,221 @@
+/**
+ * @file encoder.h
+ *
+ * Key event encoding to terminal escape sequences.
+ */
+
+#ifndef GHOSTTY_VT_KEY_ENCODER_H
+#define GHOSTTY_VT_KEY_ENCODER_H
+
+#include <stddef.h>
+#include <stdint.h>
+#include <ghostty/vt/result.h>
+#include <ghostty/vt/allocator.h>
+#include <ghostty/vt/key/event.h>
+
+/**
+ * Opaque handle to a key encoder instance.
+ *
+ * This handle represents a key encoder that converts key events into terminal
+ * escape sequences.
+ *
+ * @ingroup key
+ */
+typedef struct GhosttyKeyEncoder *GhosttyKeyEncoder;
+
+/**
+ * Kitty keyboard protocol flags.
+ *
+ * Bitflags representing the various modes of the Kitty keyboard protocol.
+ * These can be combined using bitwise OR operations. Valid values all
+ * start with `GHOSTTY_KITTY_KEY_`.
+ *
+ * @ingroup key
+ */
+typedef uint8_t GhosttyKittyKeyFlags;
+
+/** Kitty keyboard protocol disabled (all flags off) */
+#define GHOSTTY_KITTY_KEY_DISABLED 0
+
+/** Disambiguate escape codes */
+#define GHOSTTY_KITTY_KEY_DISAMBIGUATE (1 << 0)
+
+/** Report key press and release events */
+#define GHOSTTY_KITTY_KEY_REPORT_EVENTS (1 << 1)
+
+/** Report alternate key codes */
+#define GHOSTTY_KITTY_KEY_REPORT_ALTERNATES (1 << 2)
+
+/** Report all key events including those normally handled by the terminal */
+#define GHOSTTY_KITTY_KEY_REPORT_ALL (1 << 3)
+
+/** Report associated text with key events */
+#define GHOSTTY_KITTY_KEY_REPORT_ASSOCIATED (1 << 4)
+
+/** All Kitty keyboard protocol flags enabled */
+#define GHOSTTY_KITTY_KEY_ALL (GHOSTTY_KITTY_KEY_DISAMBIGUATE | GHOSTTY_KITTY_KEY_REPORT_EVENTS | GHOSTTY_KITTY_KEY_REPORT_ALTERNATES | GHOSTTY_KITTY_KEY_REPORT_ALL | GHOSTTY_KITTY_KEY_REPORT_ASSOCIATED)
+
+/**
+ * macOS option key behavior.
+ *
+ * Determines whether the "option" key on macOS is treated as "alt" or not.
+ * See the Ghostty `macos-option-as-alt` configuration option for more details.
+ *
+ * @ingroup key
+ */
+typedef enum {
+    /** Option key is not treated as alt */
+    GHOSTTY_OPTION_AS_ALT_FALSE = 0,
+    /** Option key is treated as alt */
+    GHOSTTY_OPTION_AS_ALT_TRUE = 1,
+    /** Only left option key is treated as alt */
+    GHOSTTY_OPTION_AS_ALT_LEFT = 2,
+    /** Only right option key is treated as alt */
+    GHOSTTY_OPTION_AS_ALT_RIGHT = 3,
+} GhosttyOptionAsAlt;
+
+/**
+ * Key encoder option identifiers.
+ *
+ * These values are used with ghostty_key_encoder_setopt() to configure
+ * the behavior of the key encoder.
+ *
+ * @ingroup key
+ */
+typedef enum {
+    /** Terminal DEC mode 1: cursor key application mode (value: bool) */
+    GHOSTTY_KEY_ENCODER_OPT_CURSOR_KEY_APPLICATION = 0,
+    
+    /** Terminal DEC mode 66: keypad key application mode (value: bool) */
+    GHOSTTY_KEY_ENCODER_OPT_KEYPAD_KEY_APPLICATION = 1,
+    
+    /** Terminal DEC mode 1035: ignore keypad with numlock (value: bool) */
+    GHOSTTY_KEY_ENCODER_OPT_IGNORE_KEYPAD_WITH_NUMLOCK = 2,
+    
+    /** Terminal DEC mode 1036: alt sends escape prefix (value: bool) */
+    GHOSTTY_KEY_ENCODER_OPT_ALT_ESC_PREFIX = 3,
+    
+    /** xterm modifyOtherKeys mode 2 (value: bool) */
+    GHOSTTY_KEY_ENCODER_OPT_MODIFY_OTHER_KEYS_STATE_2 = 4,
+    
+    /** Kitty keyboard protocol flags (value: GhosttyKittyKeyFlags bitmask) */
+    GHOSTTY_KEY_ENCODER_OPT_KITTY_FLAGS = 5,
+    
+    /** macOS option-as-alt setting (value: GhosttyOptionAsAlt) */
+    GHOSTTY_KEY_ENCODER_OPT_MACOS_OPTION_AS_ALT = 6,
+} GhosttyKeyEncoderOption;
+
+/**
+ * Create a new key encoder instance.
+ *
+ * Creates a new key encoder with default options. The encoder can be configured
+ * using ghostty_key_encoder_setopt() and must be freed using
+ * ghostty_key_encoder_free() when no longer needed.
+ *
+ * @param allocator Pointer to the allocator to use for memory management, or NULL to use the default allocator
+ * @param encoder Pointer to store the created encoder handle
+ * @return GHOSTTY_SUCCESS on success, or an error code on failure
+ *
+ * @ingroup key
+ */
+GhosttyResult ghostty_key_encoder_new(const GhosttyAllocator *allocator, GhosttyKeyEncoder *encoder);
+
+/**
+ * Free a key encoder instance.
+ *
+ * Releases all resources associated with the key encoder. After this call,
+ * the encoder handle becomes invalid and must not be used.
+ *
+ * @param encoder The encoder handle to free (may be NULL)
+ *
+ * @ingroup key
+ */
+void ghostty_key_encoder_free(GhosttyKeyEncoder encoder);
+
+/**
+ * Set an option on the key encoder.
+ *
+ * Configures the behavior of the key encoder. Options control various aspects
+ * of encoding such as terminal modes (cursor key application mode, keypad mode),
+ * protocol selection (Kitty keyboard protocol flags), and platform-specific
+ * behaviors (macOS option-as-alt).
+ *
+ * A null pointer value does nothing. It does not reset the value to the
+ * default. The setopt call will do nothing.
+ *
+ * @param encoder The encoder handle, must not be NULL
+ * @param option The option to set
+ * @param value Pointer to the value to set (type depends on the option)
+ *
+ * @ingroup key
+ */
+void ghostty_key_encoder_setopt(GhosttyKeyEncoder encoder, GhosttyKeyEncoderOption option, const void *value);
+
+/**
+ * Encode a key event into a terminal escape sequence.
+ *
+ * Converts a key event into the appropriate terminal escape sequence based on
+ * the encoder's current options. The sequence is written to the provided buffer.
+ *
+ * Not all key events produce output. For example, unmodified modifier keys
+ * typically don't generate escape sequences. Check the out_len parameter to
+ * determine if any data was written.
+ *
+ * If the output buffer is too small, this function returns GHOSTTY_OUT_OF_MEMORY
+ * and out_len will contain the required buffer size. The caller can then
+ * allocate a larger buffer and call the function again.
+ *
+ * @param encoder The encoder handle, must not be NULL
+ * @param event The key event to encode, must not be NULL
+ * @param out_buf Buffer to write the encoded sequence to
+ * @param out_buf_size Size of the output buffer in bytes
+ * @param out_len Pointer to store the number of bytes written (may be NULL)
+ * @return GHOSTTY_SUCCESS on success, GHOSTTY_OUT_OF_MEMORY if buffer too small, or other error code
+ *
+ * ## Example: Calculate required buffer size
+ *
+ * @code{.c}
+ * // Query the required size with a NULL buffer (always returns OUT_OF_MEMORY)
+ * size_t required = 0;
+ * GhosttyResult result = ghostty_key_encoder_encode(encoder, event, NULL, 0, &required);
+ * assert(result == GHOSTTY_OUT_OF_MEMORY);
+ * 
+ * // Allocate buffer of required size
+ * char *buf = malloc(required);
+ * 
+ * // Encode with properly sized buffer
+ * size_t written = 0;
+ * result = ghostty_key_encoder_encode(encoder, event, buf, required, &written);
+ * assert(result == GHOSTTY_SUCCESS);
+ * 
+ * // Use the encoded sequence...
+ * 
+ * free(buf);
+ * @endcode
+ *
+ * ## Example: Direct encoding with static buffer
+ *
+ * @code{.c}
+ * // Most escape sequences are short, so a static buffer often suffices
+ * char buf[128];
+ * size_t written = 0;
+ * GhosttyResult result = ghostty_key_encoder_encode(encoder, event, buf, sizeof(buf), &written);
+ * 
+ * if (result == GHOSTTY_SUCCESS) {
+ *   // Write the encoded sequence to the terminal
+ *   write(pty_fd, buf, written);
+ * } else if (result == GHOSTTY_OUT_OF_MEMORY) {
+ *   // Buffer too small, written contains required size
+ *   char *dynamic_buf = malloc(written);
+ *   result = ghostty_key_encoder_encode(encoder, event, dynamic_buf, written, &written);
+ *   assert(result == GHOSTTY_SUCCESS);
+ *   write(pty_fd, dynamic_buf, written);
+ *   free(dynamic_buf);
+ * }
+ * @endcode
+ *
+ * @ingroup key
+ */
+GhosttyResult ghostty_key_encoder_encode(GhosttyKeyEncoder encoder, GhosttyKeyEvent event, char *out_buf, size_t out_buf_size, size_t *out_len);
+
+#endif /* GHOSTTY_VT_KEY_ENCODER_H */

vendor/libghostty/include/ghostty/vt/key/event.h

@@ -0,0 +1,474 @@
+/**
+ * @file event.h
+ *
+ * Key event representation and manipulation.
+ */
+
+#ifndef GHOSTTY_VT_KEY_EVENT_H
+#define GHOSTTY_VT_KEY_EVENT_H
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <ghostty/vt/result.h>
+#include <ghostty/vt/allocator.h>
+
+/**
+ * Opaque handle to a key event.
+ * 
+ * This handle represents a keyboard input event containing information about
+ * the physical key pressed, modifiers, and generated text.
+ *
+ * @ingroup key
+ */
+typedef struct GhosttyKeyEvent *GhosttyKeyEvent;
+
+/**
+ * Keyboard input event types.
+ *
+ * @ingroup key
+ */
+typedef enum {
+    /** Key was released */
+    GHOSTTY_KEY_ACTION_RELEASE = 0,
+    /** Key was pressed */
+    GHOSTTY_KEY_ACTION_PRESS = 1,
+    /** Key is being repeated (held down) */
+    GHOSTTY_KEY_ACTION_REPEAT = 2,
+} GhosttyKeyAction;
+
+/**
+ * Keyboard modifier keys bitmask.
+ *
+ * A bitmask representing all keyboard modifiers. This tracks which modifier keys 
+ * are pressed and, where supported by the platform, which side (left or right) 
+ * of each modifier is active.
+ *
+ * Use the GHOSTTY_MODS_* constants to test and set individual modifiers.
+ *
+ * Modifier side bits are only meaningful when the corresponding modifier bit is set.
+ * Not all platforms support distinguishing between left and right modifier 
+ * keys and Ghostty is built to expect that some platforms may not provide this
+ * information.
+ *
+ * @ingroup key
+ */
+typedef uint16_t GhosttyMods;
+
+/** Shift key is pressed */
+#define GHOSTTY_MODS_SHIFT (1 << 0)
+/** Control key is pressed */
+#define GHOSTTY_MODS_CTRL (1 << 1)
+/** Alt/Option key is pressed */
+#define GHOSTTY_MODS_ALT (1 << 2)
+/** Super/Command/Windows key is pressed */
+#define GHOSTTY_MODS_SUPER (1 << 3)
+/** Caps Lock is active */
+#define GHOSTTY_MODS_CAPS_LOCK (1 << 4)
+/** Num Lock is active */
+#define GHOSTTY_MODS_NUM_LOCK (1 << 5)
+
+/**
+ * Right shift is pressed (0 = left, 1 = right).
+ * Only meaningful when GHOSTTY_MODS_SHIFT is set.
+ */
+#define GHOSTTY_MODS_SHIFT_SIDE (1 << 6)
+/**
+ * Right ctrl is pressed (0 = left, 1 = right).
+ * Only meaningful when GHOSTTY_MODS_CTRL is set.
+ */
+#define GHOSTTY_MODS_CTRL_SIDE (1 << 7)
+/**
+ * Right alt is pressed (0 = left, 1 = right).
+ * Only meaningful when GHOSTTY_MODS_ALT is set.
+ */
+#define GHOSTTY_MODS_ALT_SIDE (1 << 8)
+/**
+ * Right super is pressed (0 = left, 1 = right).
+ * Only meaningful when GHOSTTY_MODS_SUPER is set.
+ */
+#define GHOSTTY_MODS_SUPER_SIDE (1 << 9)
+
+/**
+ * Physical key codes.
+ *
+ * The set of key codes that Ghostty is aware of. These represent physical keys 
+ * on the keyboard and are layout-independent. For example, the "a" key on a US 
+ * keyboard is the same as the "ф" key on a Russian keyboard, but both will 
+ * report the same key_a value.
+ *
+ * Layout-dependent strings are provided separately as UTF-8 text and are produced 
+ * by the platform. These values are based on the W3C UI Events KeyboardEvent code 
+ * standard. See: https://www.w3.org/TR/uievents-code
+ *
+ * @ingroup key
+ */
+typedef enum {
+    GHOSTTY_KEY_UNIDENTIFIED = 0,
+
+    // Writing System Keys (W3C § 3.1.1)
+    GHOSTTY_KEY_BACKQUOTE,
+    GHOSTTY_KEY_BACKSLASH,
+    GHOSTTY_KEY_BRACKET_LEFT,
+    GHOSTTY_KEY_BRACKET_RIGHT,
+    GHOSTTY_KEY_COMMA,
+    GHOSTTY_KEY_DIGIT_0,
+    GHOSTTY_KEY_DIGIT_1,
+    GHOSTTY_KEY_DIGIT_2,
+    GHOSTTY_KEY_DIGIT_3,
+    GHOSTTY_KEY_DIGIT_4,
+    GHOSTTY_KEY_DIGIT_5,
+    GHOSTTY_KEY_DIGIT_6,
+    GHOSTTY_KEY_DIGIT_7,
+    GHOSTTY_KEY_DIGIT_8,
+    GHOSTTY_KEY_DIGIT_9,
+    GHOSTTY_KEY_EQUAL,
+    GHOSTTY_KEY_INTL_BACKSLASH,
+    GHOSTTY_KEY_INTL_RO,
+    GHOSTTY_KEY_INTL_YEN,
+    GHOSTTY_KEY_A,
+    GHOSTTY_KEY_B,
+    GHOSTTY_KEY_C,
+    GHOSTTY_KEY_D,
+    GHOSTTY_KEY_E,
+    GHOSTTY_KEY_F,
+    GHOSTTY_KEY_G,
+    GHOSTTY_KEY_H,
+    GHOSTTY_KEY_I,
+    GHOSTTY_KEY_J,
+    GHOSTTY_KEY_K,
+    GHOSTTY_KEY_L,
+    GHOSTTY_KEY_M,
+    GHOSTTY_KEY_N,
+    GHOSTTY_KEY_O,
+    GHOSTTY_KEY_P,
+    GHOSTTY_KEY_Q,
+    GHOSTTY_KEY_R,
+    GHOSTTY_KEY_S,
+    GHOSTTY_KEY_T,
+    GHOSTTY_KEY_U,
+    GHOSTTY_KEY_V,
+    GHOSTTY_KEY_W,
+    GHOSTTY_KEY_X,
+    GHOSTTY_KEY_Y,
+    GHOSTTY_KEY_Z,
+    GHOSTTY_KEY_MINUS,
+    GHOSTTY_KEY_PERIOD,
+    GHOSTTY_KEY_QUOTE,
+    GHOSTTY_KEY_SEMICOLON,
+    GHOSTTY_KEY_SLASH,
+
+    // Functional Keys (W3C § 3.1.2)
+    GHOSTTY_KEY_ALT_LEFT,
+    GHOSTTY_KEY_ALT_RIGHT,
+    GHOSTTY_KEY_BACKSPACE,
+    GHOSTTY_KEY_CAPS_LOCK,
+    GHOSTTY_KEY_CONTEXT_MENU,
+    GHOSTTY_KEY_CONTROL_LEFT,
+    GHOSTTY_KEY_CONTROL_RIGHT,
+    GHOSTTY_KEY_ENTER,
+    GHOSTTY_KEY_META_LEFT,
+    GHOSTTY_KEY_META_RIGHT,
+    GHOSTTY_KEY_SHIFT_LEFT,
+    GHOSTTY_KEY_SHIFT_RIGHT,
+    GHOSTTY_KEY_SPACE,
+    GHOSTTY_KEY_TAB,
+    GHOSTTY_KEY_CONVERT,
+    GHOSTTY_KEY_KANA_MODE,
+    GHOSTTY_KEY_NON_CONVERT,
+
+    // Control Pad Section (W3C § 3.2)
+    GHOSTTY_KEY_DELETE,
+    GHOSTTY_KEY_END,
+    GHOSTTY_KEY_HELP,
+    GHOSTTY_KEY_HOME,
+    GHOSTTY_KEY_INSERT,
+    GHOSTTY_KEY_PAGE_DOWN,
+    GHOSTTY_KEY_PAGE_UP,
+
+    // Arrow Pad Section (W3C § 3.3)
+    GHOSTTY_KEY_ARROW_DOWN,
+    GHOSTTY_KEY_ARROW_LEFT,
+    GHOSTTY_KEY_ARROW_RIGHT,
+    GHOSTTY_KEY_ARROW_UP,
+
+    // Numpad Section (W3C § 3.4)
+    GHOSTTY_KEY_NUM_LOCK,
+    GHOSTTY_KEY_NUMPAD_0,
+    GHOSTTY_KEY_NUMPAD_1,
+    GHOSTTY_KEY_NUMPAD_2,
+    GHOSTTY_KEY_NUMPAD_3,
+    GHOSTTY_KEY_NUMPAD_4,
+    GHOSTTY_KEY_NUMPAD_5,
+    GHOSTTY_KEY_NUMPAD_6,
+    GHOSTTY_KEY_NUMPAD_7,
+    GHOSTTY_KEY_NUMPAD_8,
+    GHOSTTY_KEY_NUMPAD_9,
+    GHOSTTY_KEY_NUMPAD_ADD,
+    GHOSTTY_KEY_NUMPAD_BACKSPACE,
+    GHOSTTY_KEY_NUMPAD_CLEAR,
+    GHOSTTY_KEY_NUMPAD_CLEAR_ENTRY,
+    GHOSTTY_KEY_NUMPAD_COMMA,
+    GHOSTTY_KEY_NUMPAD_DECIMAL,
+    GHOSTTY_KEY_NUMPAD_DIVIDE,
+    GHOSTTY_KEY_NUMPAD_ENTER,
+    GHOSTTY_KEY_NUMPAD_EQUAL,
+    GHOSTTY_KEY_NUMPAD_MEMORY_ADD,
+    GHOSTTY_KEY_NUMPAD_MEMORY_CLEAR,
+    GHOSTTY_KEY_NUMPAD_MEMORY_RECALL,
+    GHOSTTY_KEY_NUMPAD_MEMORY_STORE,
+    GHOSTTY_KEY_NUMPAD_MEMORY_SUBTRACT,
+    GHOSTTY_KEY_NUMPAD_MULTIPLY,
+    GHOSTTY_KEY_NUMPAD_PAREN_LEFT,
+    GHOSTTY_KEY_NUMPAD_PAREN_RIGHT,
+    GHOSTTY_KEY_NUMPAD_SUBTRACT,
+    GHOSTTY_KEY_NUMPAD_SEPARATOR,
+    GHOSTTY_KEY_NUMPAD_UP,
+    GHOSTTY_KEY_NUMPAD_DOWN,
+    GHOSTTY_KEY_NUMPAD_RIGHT,
+    GHOSTTY_KEY_NUMPAD_LEFT,
+    GHOSTTY_KEY_NUMPAD_BEGIN,
+    GHOSTTY_KEY_NUMPAD_HOME,
+    GHOSTTY_KEY_NUMPAD_END,
+    GHOSTTY_KEY_NUMPAD_INSERT,
+    GHOSTTY_KEY_NUMPAD_DELETE,
+    GHOSTTY_KEY_NUMPAD_PAGE_UP,
+    GHOSTTY_KEY_NUMPAD_PAGE_DOWN,
+
+    // Function Section (W3C § 3.5)
+    GHOSTTY_KEY_ESCAPE,
+    GHOSTTY_KEY_F1,
+    GHOSTTY_KEY_F2,
+    GHOSTTY_KEY_F3,
+    GHOSTTY_KEY_F4,
+    GHOSTTY_KEY_F5,
+    GHOSTTY_KEY_F6,
+    GHOSTTY_KEY_F7,
+    GHOSTTY_KEY_F8,
+    GHOSTTY_KEY_F9,
+    GHOSTTY_KEY_F10,
+    GHOSTTY_KEY_F11,
+    GHOSTTY_KEY_F12,
+    GHOSTTY_KEY_F13,
+    GHOSTTY_KEY_F14,
+    GHOSTTY_KEY_F15,
+    GHOSTTY_KEY_F16,
+    GHOSTTY_KEY_F17,
+    GHOSTTY_KEY_F18,
+    GHOSTTY_KEY_F19,
+    GHOSTTY_KEY_F20,
+    GHOSTTY_KEY_F21,
+    GHOSTTY_KEY_F22,
+    GHOSTTY_KEY_F23,
+    GHOSTTY_KEY_F24,
+    GHOSTTY_KEY_F25,
+    GHOSTTY_KEY_FN,
+    GHOSTTY_KEY_FN_LOCK,
+    GHOSTTY_KEY_PRINT_SCREEN,
+    GHOSTTY_KEY_SCROLL_LOCK,
+    GHOSTTY_KEY_PAUSE,
+
+    // Media Keys (W3C § 3.6)
+    GHOSTTY_KEY_BROWSER_BACK,
+    GHOSTTY_KEY_BROWSER_FAVORITES,
+    GHOSTTY_KEY_BROWSER_FORWARD,
+    GHOSTTY_KEY_BROWSER_HOME,
+    GHOSTTY_KEY_BROWSER_REFRESH,
+    GHOSTTY_KEY_BROWSER_SEARCH,
+    GHOSTTY_KEY_BROWSER_STOP,
+    GHOSTTY_KEY_EJECT,
+    GHOSTTY_KEY_LAUNCH_APP_1,
+    GHOSTTY_KEY_LAUNCH_APP_2,
+    GHOSTTY_KEY_LAUNCH_MAIL,
+    GHOSTTY_KEY_MEDIA_PLAY_PAUSE,
+    GHOSTTY_KEY_MEDIA_SELECT,
+    GHOSTTY_KEY_MEDIA_STOP,
+    GHOSTTY_KEY_MEDIA_TRACK_NEXT,
+    GHOSTTY_KEY_MEDIA_TRACK_PREVIOUS,
+    GHOSTTY_KEY_POWER,
+    GHOSTTY_KEY_SLEEP,
+    GHOSTTY_KEY_AUDIO_VOLUME_DOWN,
+    GHOSTTY_KEY_AUDIO_VOLUME_MUTE,
+    GHOSTTY_KEY_AUDIO_VOLUME_UP,
+    GHOSTTY_KEY_WAKE_UP,
+
+    // Legacy, Non-standard, and Special Keys (W3C § 3.7)
+    GHOSTTY_KEY_COPY,
+    GHOSTTY_KEY_CUT,
+    GHOSTTY_KEY_PASTE,
+} GhosttyKey;
+
+/**
+ * Create a new key event instance.
+ * 
+ * Creates a new key event with default values. The event must be freed using
+ * ghostty_key_event_free() when no longer needed.
+ * 
+ * @param allocator Pointer to the allocator to use for memory management, or NULL to use the default allocator
+ * @param event Pointer to store the created key event handle
+ * @return GHOSTTY_SUCCESS on success, or an error code on failure
+ * 
+ * @ingroup key
+ */
+GhosttyResult ghostty_key_event_new(const GhosttyAllocator *allocator, GhosttyKeyEvent *event);
+
+/**
+ * Free a key event instance.
+ * 
+ * Releases all resources associated with the key event. After this call,
+ * the event handle becomes invalid and must not be used.
+ * 
+ * @param event The key event handle to free (may be NULL)
+ * 
+ * @ingroup key
+ */
+void ghostty_key_event_free(GhosttyKeyEvent event);
+
+/**
+ * Set the key action (press, release, repeat).
+ *
+ * @param event The key event handle, must not be NULL
+ * @param action The action to set
+ *
+ * @ingroup key
+ */
+void ghostty_key_event_set_action(GhosttyKeyEvent event, GhosttyKeyAction action);
+
+/**
+ * Get the key action (press, release, repeat).
+ *
+ * @param event The key event handle, must not be NULL
+ * @return The key action
+ *
+ * @ingroup key
+ */
+GhosttyKeyAction ghostty_key_event_get_action(GhosttyKeyEvent event);
+
+/**
+ * Set the physical key code.
+ *
+ * @param event The key event handle, must not be NULL
+ * @param key The physical key code to set
+ *
+ * @ingroup key
+ */
+void ghostty_key_event_set_key(GhosttyKeyEvent event, GhosttyKey key);
+
+/**
+ * Get the physical key code.
+ *
+ * @param event The key event handle, must not be NULL
+ * @return The physical key code
+ *
+ * @ingroup key
+ */
+GhosttyKey ghostty_key_event_get_key(GhosttyKeyEvent event);
+
+/**
+ * Set the modifier keys bitmask.
+ *
+ * @param event The key event handle, must not be NULL
+ * @param mods The modifier keys bitmask to set
+ *
+ * @ingroup key
+ */
+void ghostty_key_event_set_mods(GhosttyKeyEvent event, GhosttyMods mods);
+
+/**
+ * Get the modifier keys bitmask.
+ *
+ * @param event The key event handle, must not be NULL
+ * @return The modifier keys bitmask
+ *
+ * @ingroup key
+ */
+GhosttyMods ghostty_key_event_get_mods(GhosttyKeyEvent event);
+
+/**
+ * Set the consumed modifiers bitmask.
+ *
+ * @param event The key event handle, must not be NULL
+ * @param consumed_mods The consumed modifiers bitmask to set
+ *
+ * @ingroup key
+ */
+void ghostty_key_event_set_consumed_mods(GhosttyKeyEvent event, GhosttyMods consumed_mods);
+
+/**
+ * Get the consumed modifiers bitmask.
+ *
+ * @param event The key event handle, must not be NULL
+ * @return The consumed modifiers bitmask
+ *
+ * @ingroup key
+ */
+GhosttyMods ghostty_key_event_get_consumed_mods(GhosttyKeyEvent event);
+
+/**
+ * Set whether the key event is part of a composition sequence.
+ *
+ * @param event The key event handle, must not be NULL
+ * @param composing Whether the key event is part of a composition sequence
+ *
+ * @ingroup key
+ */
+void ghostty_key_event_set_composing(GhosttyKeyEvent event, bool composing);
+
+/**
+ * Get whether the key event is part of a composition sequence.
+ *
+ * @param event The key event handle, must not be NULL
+ * @return Whether the key event is part of a composition sequence
+ *
+ * @ingroup key
+ */
+bool ghostty_key_event_get_composing(GhosttyKeyEvent event);
+
+/**
+ * Set the UTF-8 text generated by the key event.
+ *
+ * The key event does NOT take ownership of the text pointer. The caller
+ * must ensure the string remains valid for the lifetime needed by the event.
+ *
+ * @param event The key event handle, must not be NULL
+ * @param utf8 The UTF-8 text to set (or NULL for empty)
+ * @param len Length of the UTF-8 text in bytes
+ *
+ * @ingroup key
+ */
+void ghostty_key_event_set_utf8(GhosttyKeyEvent event, const char *utf8, size_t len);
+
+/**
+ * Get the UTF-8 text generated by the key event.
+ *
+ * The returned pointer is valid until the event is freed or the UTF-8 text is modified.
+ *
+ * @param event The key event handle, must not be NULL
+ * @param len Pointer to store the length of the UTF-8 text in bytes (may be NULL)
+ * @return The UTF-8 text (or NULL for empty)
+ *
+ * @ingroup key
+ */
+const char *ghostty_key_event_get_utf8(GhosttyKeyEvent event, size_t *len);
+
+/**
+ * Set the unshifted Unicode codepoint.
+ *
+ * @param event The key event handle, must not be NULL
+ * @param codepoint The unshifted Unicode codepoint to set
+ *
+ * @ingroup key
+ */
+void ghostty_key_event_set_unshifted_codepoint(GhosttyKeyEvent event, uint32_t codepoint);
+
+/**
+ * Get the unshifted Unicode codepoint.
+ *
+ * @param event The key event handle, must not be NULL
+ * @return The unshifted Unicode codepoint
+ *
+ * @ingroup key
+ */
+uint32_t ghostty_key_event_get_unshifted_codepoint(GhosttyKeyEvent event);
+
+#endif /* GHOSTTY_VT_KEY_EVENT_H */

vendor/libghostty/include/ghostty/vt/osc.h

@@ -0,0 +1,233 @@
+/**
+ * @file osc.h
+ *
+ * OSC (Operating System Command) sequence parser and command handling.
+ */
+
+#ifndef GHOSTTY_VT_OSC_H
+#define GHOSTTY_VT_OSC_H
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <ghostty/vt/result.h>
+#include <ghostty/vt/allocator.h>
+
+/**
+ * Opaque handle to an OSC parser instance.
+ * 
+ * This handle represents an OSC (Operating System Command) parser that can
+ * be used to parse the contents of OSC sequences.
+ *
+ * @ingroup osc
+ */
+typedef struct GhosttyOscParser *GhosttyOscParser;
+
+/**
+ * Opaque handle to a single OSC command.
+ * 
+ * This handle represents a parsed OSC (Operating System Command) command.
+ * The command can be queried for its type and associated data.
+ *
+ * @ingroup osc
+ */
+typedef struct GhosttyOscCommand *GhosttyOscCommand;
+
+/** @defgroup osc OSC Parser
+ *
+ * OSC (Operating System Command) sequence parser and command handling.
+ *
+ * The parser operates in a streaming fashion, processing input byte-by-byte
+ * to handle OSC sequences that may arrive in fragments across multiple reads.
+ * This interface makes it easy to integrate into most environments and avoids
+ * over-allocating buffers.
+ *
+ * ## Basic Usage
+ *
+ * 1. Create a parser instance with ghostty_osc_new()
+ * 2. Feed bytes to the parser using ghostty_osc_next() 
+ * 3. Finalize parsing with ghostty_osc_end() to get the command
+ * 4. Query command type and extract data using ghostty_osc_command_type()
+ *    and ghostty_osc_command_data()
+ * 5. Free the parser with ghostty_osc_free() when done
+ *
+ * @{
+ */
+
+/**
+ * OSC command types.
+ *
+ * @ingroup osc
+ */
+typedef enum {
+  GHOSTTY_OSC_COMMAND_INVALID = 0,
+  GHOSTTY_OSC_COMMAND_CHANGE_WINDOW_TITLE = 1,
+  GHOSTTY_OSC_COMMAND_CHANGE_WINDOW_ICON = 2,
+  GHOSTTY_OSC_COMMAND_SEMANTIC_PROMPT = 3,
+  GHOSTTY_OSC_COMMAND_CLIPBOARD_CONTENTS = 4,
+  GHOSTTY_OSC_COMMAND_REPORT_PWD = 5,
+  GHOSTTY_OSC_COMMAND_MOUSE_SHAPE = 6,
+  GHOSTTY_OSC_COMMAND_COLOR_OPERATION = 7,
+  GHOSTTY_OSC_COMMAND_KITTY_COLOR_PROTOCOL = 8,
+  GHOSTTY_OSC_COMMAND_SHOW_DESKTOP_NOTIFICATION = 9,
+  GHOSTTY_OSC_COMMAND_HYPERLINK_START = 10,
+  GHOSTTY_OSC_COMMAND_HYPERLINK_END = 11,
+  GHOSTTY_OSC_COMMAND_CONEMU_SLEEP = 12,
+  GHOSTTY_OSC_COMMAND_CONEMU_SHOW_MESSAGE_BOX = 13,
+  GHOSTTY_OSC_COMMAND_CONEMU_CHANGE_TAB_TITLE = 14,
+  GHOSTTY_OSC_COMMAND_CONEMU_PROGRESS_REPORT = 15,
+  GHOSTTY_OSC_COMMAND_CONEMU_WAIT_INPUT = 16,
+  GHOSTTY_OSC_COMMAND_CONEMU_GUIMACRO = 17,
+  GHOSTTY_OSC_COMMAND_CONEMU_RUN_PROCESS = 18,
+  GHOSTTY_OSC_COMMAND_CONEMU_OUTPUT_ENVIRONMENT_VARIABLE = 19,
+  GHOSTTY_OSC_COMMAND_CONEMU_XTERM_EMULATION = 20,
+  GHOSTTY_OSC_COMMAND_CONEMU_COMMENT = 21,
+  GHOSTTY_OSC_COMMAND_KITTY_TEXT_SIZING = 22,
+} GhosttyOscCommandType;
+
+/**
+ * OSC command data types.
+ * 
+ * These values specify what type of data to extract from an OSC command
+ * using `ghostty_osc_command_data`.
+ *
+ * @ingroup osc
+ */
+typedef enum {
+  /** Invalid data type. Never results in any data extraction. */
+  GHOSTTY_OSC_DATA_INVALID = 0,
+  
+  /** 
+   * Window title string data.
+   *
+   * Valid for: GHOSTTY_OSC_COMMAND_CHANGE_WINDOW_TITLE
+   *
+   * Output type: const char ** (pointer to null-terminated string)
+   *
+   * Lifetime: Valid until the next call to any ghostty_osc_* function with 
+   * the same parser instance. Memory is owned by the parser.
+   */
+  GHOSTTY_OSC_DATA_CHANGE_WINDOW_TITLE_STR = 1,
+} GhosttyOscCommandData;
+
+/**
+ * Create a new OSC parser instance.
+ * 
+ * Creates a new OSC (Operating System Command) parser using the provided
+ * allocator. The parser must be freed using ghostty_vt_osc_free() when
+ * no longer needed.
+ * 
+ * @param allocator Pointer to the allocator to use for memory management, or NULL to use the default allocator
+ * @param parser Pointer to store the created parser handle
+ * @return GHOSTTY_SUCCESS on success, or an error code on failure
+ * 
+ * @ingroup osc
+ */
+GhosttyResult ghostty_osc_new(const GhosttyAllocator *allocator, GhosttyOscParser *parser);
+
+/**
+ * Free an OSC parser instance.
+ * 
+ * Releases all resources associated with the OSC parser. After this call,
+ * the parser handle becomes invalid and must not be used.
+ * 
+ * @param parser The parser handle to free (may be NULL)
+ * 
+ * @ingroup osc
+ */
+void ghostty_osc_free(GhosttyOscParser parser);
+
+/**
+ * Reset an OSC parser instance to its initial state.
+ * 
+ * Resets the parser state, clearing any partially parsed OSC sequences
+ * and returning the parser to its initial state. This is useful for
+ * reusing a parser instance or recovering from parse errors.
+ * 
+ * @param parser The parser handle to reset, must not be null.
+ * 
+ * @ingroup osc
+ */
+void ghostty_osc_reset(GhosttyOscParser parser);
+
+/**
+ * Parse the next byte in an OSC sequence.
+ * 
+ * Processes a single byte as part of an OSC sequence. The parser maintains
+ * internal state to track the progress through the sequence. Call this
+ * function for each byte in the sequence data.
+ *
+ * When finished pumping the parser with bytes, call ghostty_osc_end
+ * to get the final result.
+ * 
+ * @param parser The parser handle, must not be null.
+ * @param byte The next byte to parse
+ * 
+ * @ingroup osc
+ */
+void ghostty_osc_next(GhosttyOscParser parser, uint8_t byte);
+
+/**
+ * Finalize OSC parsing and retrieve the parsed command.
+ * 
+ * Call this function after feeding all bytes of an OSC sequence to the parser
+ * using ghostty_osc_next() with the exception of the terminating character
+ * (ESC or ST). This function finalizes the parsing process and returns the 
+ * parsed OSC command.
+ *
+ * The return value is never NULL. Invalid commands will return a command
+ * with type GHOSTTY_OSC_COMMAND_INVALID.
+ * 
+ * The terminator parameter specifies the byte that terminated the OSC sequence
+ * (typically 0x07 for BEL or 0x5C for ST after ESC). This information is
+ * preserved in the parsed command so that responses can use the same terminator
+ * format for better compatibility with the calling program. For commands that
+ * do not require a response, this parameter is ignored and the resulting
+ * command will not retain the terminator information.
+ * 
+ * The returned command handle is valid until the next call to any 
+ * `ghostty_osc_*` function with the same parser instance with the exception
+ * of command introspection functions such as `ghostty_osc_command_type`.
+ * 
+ * @param parser The parser handle, must not be null.
+ * @param terminator The terminating byte of the OSC sequence (0x07 for BEL, 0x5C for ST)
+ * @return Handle to the parsed OSC command
+ * 
+ * @ingroup osc
+ */
+GhosttyOscCommand ghostty_osc_end(GhosttyOscParser parser, uint8_t terminator);
+
+/**
+ * Get the type of an OSC command.
+ * 
+ * Returns the type identifier for the given OSC command. This can be used
+ * to determine what kind of command was parsed and what data might be
+ * available from it.
+ * 
+ * @param command The OSC command handle to query (may be NULL)
+ * @return The command type, or GHOSTTY_OSC_COMMAND_INVALID if command is NULL
+ * 
+ * @ingroup osc
+ */
+GhosttyOscCommandType ghostty_osc_command_type(GhosttyOscCommand command);
+
+/**
+ * Extract data from an OSC command.
+ * 
+ * Extracts typed data from the given OSC command based on the specified
+ * data type. The output pointer must be of the appropriate type for the
+ * requested data kind. Valid command types, output types, and memory
+ * safety information are documented in the `GhosttyOscCommandData` enum.
+ *
+ * @param command The OSC command handle to query (may be NULL)
+ * @param data The type of data to extract
+ * @param out Pointer to store the extracted data (type depends on data parameter)
+ * @return true if data extraction was successful, false otherwise
+ * 
+ * @ingroup osc
+ */
+bool ghostty_osc_command_data(GhosttyOscCommand command, GhosttyOscCommandData data, void *out);
+
+/** @} */
+
+#endif /* GHOSTTY_VT_OSC_H */

vendor/libghostty/include/ghostty/vt/paste.h

@@ -0,0 +1,75 @@
+/**
+ * @file paste.h
+ *
+ * Paste utilities - validate and encode paste data for terminal input.
+ */
+
+#ifndef GHOSTTY_VT_PASTE_H
+#define GHOSTTY_VT_PASTE_H
+
+/** @defgroup paste Paste Utilities
+ *
+ * Utilities for validating paste data safety.
+ *
+ * ## Basic Usage
+ *
+ * Use ghostty_paste_is_safe() to check if paste data contains potentially
+ * dangerous sequences before sending it to the terminal.
+ *
+ * ## Example
+ *
+ * @code{.c}
+ * #include <stdio.h>
+ * #include <string.h>
+ * #include <ghostty/vt.h>
+ * 
+ * int main() {
+ *   const char* safe_data = "hello world";
+ *   const char* unsafe_data = "rm -rf /\n";
+ * 
+ *   if (ghostty_paste_is_safe(safe_data, strlen(safe_data))) {
+ *     printf("Safe to paste\n");
+ *   }
+ * 
+ *   if (!ghostty_paste_is_safe(unsafe_data, strlen(unsafe_data))) {
+ *     printf("Unsafe! Contains newline\n");
+ *   }
+ * 
+ *   return 0;
+ * }
+ * @endcode
+ *
+ * @{
+ */
+
+#include <stdbool.h>
+#include <stddef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Check if paste data is safe to paste into the terminal.
+ *
+ * Data is considered unsafe if it contains:
+ * - Newlines (`\n`) which can inject commands
+ * - The bracketed paste end sequence (`\x1b[201~`) which can be used
+ *   to exit bracketed paste mode and inject commands
+ *
+ * This check is conservative and considers data unsafe regardless of
+ * current terminal state.
+ *
+ * @param data The paste data to check (must not be NULL)
+ * @param len The length of the data in bytes
+ * @return true if the data is safe to paste, false otherwise
+ */
+bool ghostty_paste_is_safe(const char* data, size_t len);
+
+#ifdef __cplusplus
+}
+#endif
+
+/** @} */
+
+#endif /* GHOSTTY_VT_PASTE_H */

vendor/libghostty/include/ghostty/vt/result.h

@@ -0,0 +1,22 @@
+/**
+ * @file result.h
+ *
+ * Result codes for libghostty-vt operations.
+ */
+
+#ifndef GHOSTTY_VT_RESULT_H
+#define GHOSTTY_VT_RESULT_H
+
+/**
+ * Result codes for libghostty-vt operations.
+ */
+typedef enum {
+    /** Operation completed successfully */
+    GHOSTTY_SUCCESS = 0,
+    /** Operation failed due to failed allocation */
+    GHOSTTY_OUT_OF_MEMORY = -1,
+    /** Operation failed due to invalid value */
+    GHOSTTY_INVALID_VALUE = -2,
+} GhosttyResult;
+
+#endif /* GHOSTTY_VT_RESULT_H */

vendor/libghostty/include/ghostty/vt/sgr.h

@@ -0,0 +1,393 @@
+/**
+ * @file sgr.h
+ *
+ * SGR (Select Graphic Rendition) attribute parsing and handling.
+ */
+
+#ifndef GHOSTTY_VT_SGR_H
+#define GHOSTTY_VT_SGR_H
+
+/** @defgroup sgr SGR Parser
+ *
+ * SGR (Select Graphic Rendition) attribute parser.
+ *
+ * SGR sequences are the syntax used to set styling attributes such as
+ * bold, italic, underline, and colors for text in terminal emulators.
+ * For example, you may be familiar with sequences like `ESC[1;31m`. The
+ * `1;31` is the SGR attribute list.
+ *
+ * The parser processes SGR parameters from CSI sequences (e.g., `ESC[1;31m`)
+ * and returns individual text attributes like bold, italic, colors, etc.
+ * It supports both semicolon (`;`) and colon (`:`) separators, possibly mixed,
+ * and handles various color formats including 8-color, 16-color, 256-color,
+ * X11 named colors, and RGB in multiple formats.
+ *
+ * ## Basic Usage
+ *
+ * 1. Create a parser instance with ghostty_sgr_new()
+ * 2. Set SGR parameters with ghostty_sgr_set_params()
+ * 3. Iterate through attributes using ghostty_sgr_next()
+ * 4. Free the parser with ghostty_sgr_free() when done
+ *
+ * ## Example
+ *
+ * @code{.c}
+ * #include <assert.h>
+ * #include <stdio.h>
+ * #include <ghostty/vt.h>
+ *
+ * int main() {
+ *   // Create parser
+ *   GhosttySgrParser parser;
+ *   GhosttyResult result = ghostty_sgr_new(NULL, &parser);
+ *   assert(result == GHOSTTY_SUCCESS);
+ *
+ *   // Parse "bold, red foreground" sequence: ESC[1;31m
+ *   uint16_t params[] = {1, 31};
+ *   result = ghostty_sgr_set_params(parser, params, NULL, 2);
+ *   assert(result == GHOSTTY_SUCCESS);
+ *
+ *   // Iterate through attributes
+ *   GhosttySgrAttribute attr;
+ *   while (ghostty_sgr_next(parser, &attr)) {
+ *     switch (attr.tag) {
+ *       case GHOSTTY_SGR_ATTR_BOLD:
+ *         printf("Bold enabled\n");
+ *         break;
+ *       case GHOSTTY_SGR_ATTR_FG_8:
+ *         printf("Foreground color: %d\n", attr.value.fg_8);
+ *         break;
+ *       default:
+ *         break;
+ *     }
+ *   }
+ *
+ *   // Cleanup
+ *   ghostty_sgr_free(parser);
+ *   return 0;
+ * }
+ * @endcode
+ *
+ * @{
+ */
+
+#include <ghostty/vt/allocator.h>
+#include <ghostty/vt/color.h>
+#include <ghostty/vt/result.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Opaque handle to an SGR parser instance.
+ *
+ * This handle represents an SGR (Select Graphic Rendition) parser that can
+ * be used to parse SGR sequences and extract individual text attributes.
+ *
+ * @ingroup sgr
+ */
+typedef struct GhosttySgrParser* GhosttySgrParser;
+
+/**
+ * SGR attribute tags.
+ *
+ * These values identify the type of an SGR attribute in a tagged union.
+ * Use the tag to determine which field in the attribute value union to access.
+ *
+ * @ingroup sgr
+ */
+typedef enum {
+  GHOSTTY_SGR_ATTR_UNSET = 0,
+  GHOSTTY_SGR_ATTR_UNKNOWN = 1,
+  GHOSTTY_SGR_ATTR_BOLD = 2,
+  GHOSTTY_SGR_ATTR_RESET_BOLD = 3,
+  GHOSTTY_SGR_ATTR_ITALIC = 4,
+  GHOSTTY_SGR_ATTR_RESET_ITALIC = 5,
+  GHOSTTY_SGR_ATTR_FAINT = 6,
+  GHOSTTY_SGR_ATTR_UNDERLINE = 7,
+  GHOSTTY_SGR_ATTR_UNDERLINE_COLOR = 8,
+  GHOSTTY_SGR_ATTR_UNDERLINE_COLOR_256 = 9,
+  GHOSTTY_SGR_ATTR_RESET_UNDERLINE_COLOR = 10,
+  GHOSTTY_SGR_ATTR_OVERLINE = 11,
+  GHOSTTY_SGR_ATTR_RESET_OVERLINE = 12,
+  GHOSTTY_SGR_ATTR_BLINK = 13,
+  GHOSTTY_SGR_ATTR_RESET_BLINK = 14,
+  GHOSTTY_SGR_ATTR_INVERSE = 15,
+  GHOSTTY_SGR_ATTR_RESET_INVERSE = 16,
+  GHOSTTY_SGR_ATTR_INVISIBLE = 17,
+  GHOSTTY_SGR_ATTR_RESET_INVISIBLE = 18,
+  GHOSTTY_SGR_ATTR_STRIKETHROUGH = 19,
+  GHOSTTY_SGR_ATTR_RESET_STRIKETHROUGH = 20,
+  GHOSTTY_SGR_ATTR_DIRECT_COLOR_FG = 21,
+  GHOSTTY_SGR_ATTR_DIRECT_COLOR_BG = 22,
+  GHOSTTY_SGR_ATTR_BG_8 = 23,
+  GHOSTTY_SGR_ATTR_FG_8 = 24,
+  GHOSTTY_SGR_ATTR_RESET_FG = 25,
+  GHOSTTY_SGR_ATTR_RESET_BG = 26,
+  GHOSTTY_SGR_ATTR_BRIGHT_BG_8 = 27,
+  GHOSTTY_SGR_ATTR_BRIGHT_FG_8 = 28,
+  GHOSTTY_SGR_ATTR_BG_256 = 29,
+  GHOSTTY_SGR_ATTR_FG_256 = 30,
+} GhosttySgrAttributeTag;
+
+/**
+ * Underline style types.
+ *
+ * @ingroup sgr
+ */
+typedef enum {
+  GHOSTTY_SGR_UNDERLINE_NONE = 0,
+  GHOSTTY_SGR_UNDERLINE_SINGLE = 1,
+  GHOSTTY_SGR_UNDERLINE_DOUBLE = 2,
+  GHOSTTY_SGR_UNDERLINE_CURLY = 3,
+  GHOSTTY_SGR_UNDERLINE_DOTTED = 4,
+  GHOSTTY_SGR_UNDERLINE_DASHED = 5,
+} GhosttySgrUnderline;
+
+/**
+ * Unknown SGR attribute data.
+ *
+ * Contains the full parameter list and the partial list where parsing
+ * encountered an unknown or invalid sequence.
+ *
+ * @ingroup sgr
+ */
+typedef struct {
+  const uint16_t* full_ptr;
+  size_t full_len;
+  const uint16_t* partial_ptr;
+  size_t partial_len;
+} GhosttySgrUnknown;
+
+/**
+ * SGR attribute value union.
+ *
+ * This union contains all possible attribute values. Use the tag field
+ * to determine which union member is active. Attributes without associated
+ * data (like bold, italic) don't use the union value.
+ *
+ * @ingroup sgr
+ */
+typedef union {
+  GhosttySgrUnknown unknown;
+  GhosttySgrUnderline underline;
+  GhosttyColorRgb underline_color;
+  GhosttyColorPaletteIndex underline_color_256;
+  GhosttyColorRgb direct_color_fg;
+  GhosttyColorRgb direct_color_bg;
+  GhosttyColorPaletteIndex bg_8;
+  GhosttyColorPaletteIndex fg_8;
+  GhosttyColorPaletteIndex bright_bg_8;
+  GhosttyColorPaletteIndex bright_fg_8;
+  GhosttyColorPaletteIndex bg_256;
+  GhosttyColorPaletteIndex fg_256;
+  uint64_t _padding[8];
+} GhosttySgrAttributeValue;
+
+/**
+ * SGR attribute (tagged union).
+ *
+ * A complete SGR attribute with both its type tag and associated value.
+ * Always check the tag field to determine which value union member is valid.
+ *
+ * Attributes without associated data (e.g., GHOSTTY_SGR_ATTR_BOLD) can be
+ * identified by tag alone; the value union is not used for these and
+ * the memory in the value field is undefined.
+ *
+ * @ingroup sgr
+ */
+typedef struct {
+  GhosttySgrAttributeTag tag;
+  GhosttySgrAttributeValue value;
+} GhosttySgrAttribute;
+
+/**
+ * Create a new SGR parser instance.
+ *
+ * Creates a new SGR (Select Graphic Rendition) parser using the provided
+ * allocator. The parser must be freed using ghostty_sgr_free() when
+ * no longer needed.
+ *
+ * @param allocator Pointer to the allocator to use for memory management, or
+ * NULL to use the default allocator
+ * @param parser Pointer to store the created parser handle
+ * @return GHOSTTY_SUCCESS on success, or an error code on failure
+ *
+ * @ingroup sgr
+ */
+GhosttyResult ghostty_sgr_new(const GhosttyAllocator* allocator,
+                              GhosttySgrParser* parser);
+
+/**
+ * Free an SGR parser instance.
+ *
+ * Releases all resources associated with the SGR parser. After this call,
+ * the parser handle becomes invalid and must not be used. This includes
+ * any attributes previously returned by ghostty_sgr_next().
+ *
+ * @param parser The parser handle to free (may be NULL)
+ *
+ * @ingroup sgr
+ */
+void ghostty_sgr_free(GhosttySgrParser parser);
+
+/**
+ * Reset an SGR parser instance to the beginning of the parameter list.
+ *
+ * Resets the parser's iteration state without clearing the parameters.
+ * After calling this, ghostty_sgr_next() will start from the beginning
+ * of the parameter list again.
+ *
+ * @param parser The parser handle to reset, must not be NULL
+ *
+ * @ingroup sgr
+ */
+void ghostty_sgr_reset(GhosttySgrParser parser);
+
+/**
+ * Set SGR parameters for parsing.
+ *
+ * Sets the SGR parameter list to parse. Parameters are the numeric values
+ * from a CSI SGR sequence (e.g., for `ESC[1;31m`, params would be {1, 31}).
+ *
+ * The separators array optionally specifies the separator type for each
+ * parameter position. Each byte should be either ';' for semicolon or ':'
+ * for colon. This is needed for certain color formats that use colon
+ * separators (e.g., `ESC[4:3m` for curly underline). Any invalid separator
+ * values are treated as semicolons. The separators array must have the same
+ * length as the params array, if it is not NULL.
+ *
+ * If separators is NULL, all parameters are assumed to be semicolon-separated.
+ *
+ * This function makes an internal copy of the parameter and separator data,
+ * so the caller can safely free or modify the input arrays after this call.
+ *
+ * After calling this function, the parser is automatically reset and ready
+ * to iterate from the beginning.
+ *
+ * @param parser The parser handle, must not be NULL
+ * @param params Array of SGR parameter values
+ * @param separators Optional array of separator characters (';' or ':'), or
+ * NULL
+ * @param len Number of parameters (and separators if provided)
+ * @return GHOSTTY_SUCCESS on success, or an error code on failure
+ *
+ * @ingroup sgr
+ */
+GhosttyResult ghostty_sgr_set_params(GhosttySgrParser parser,
+                                     const uint16_t* params,
+                                     const char* separators,
+                                     size_t len);
+
+/**
+ * Get the next SGR attribute.
+ *
+ * Parses and returns the next attribute from the parameter list.
+ * Call this function repeatedly until it returns false to process
+ * all attributes in the sequence.
+ *
+ * @param parser The parser handle, must not be NULL
+ * @param attr Pointer to store the next attribute
+ * @return true if an attribute was returned, false if no more attributes
+ *
+ * @ingroup sgr
+ */
+bool ghostty_sgr_next(GhosttySgrParser parser, GhosttySgrAttribute* attr);
+
+/**
+ * Get the full parameter list from an unknown SGR attribute.
+ *
+ * This function retrieves the full parameter list that was provided to the
+ * parser when an unknown attribute was encountered. Primarily useful in
+ * WebAssembly environments where accessing struct fields directly is difficult.
+ *
+ * @param unknown The unknown attribute data
+ * @param ptr Pointer to store the pointer to the parameter array (may be NULL)
+ * @return The length of the full parameter array
+ *
+ * @ingroup sgr
+ */
+size_t ghostty_sgr_unknown_full(GhosttySgrUnknown unknown,
+                                const uint16_t** ptr);
+
+/**
+ * Get the partial parameter list from an unknown SGR attribute.
+ *
+ * This function retrieves the partial parameter list where parsing stopped
+ * when an unknown attribute was encountered. Primarily useful in WebAssembly
+ * environments where accessing struct fields directly is difficult.
+ *
+ * @param unknown The unknown attribute data
+ * @param ptr Pointer to store the pointer to the parameter array (may be NULL)
+ * @return The length of the partial parameter array
+ *
+ * @ingroup sgr
+ */
+size_t ghostty_sgr_unknown_partial(GhosttySgrUnknown unknown,
+                                   const uint16_t** ptr);
+
+/**
+ * Get the tag from an SGR attribute.
+ *
+ * This function extracts the tag that identifies which type of attribute
+ * this is. Primarily useful in WebAssembly environments where accessing
+ * struct fields directly is difficult.
+ *
+ * @param attr The SGR attribute
+ * @return The attribute tag
+ *
+ * @ingroup sgr
+ */
+GhosttySgrAttributeTag ghostty_sgr_attribute_tag(GhosttySgrAttribute attr);
+
+/**
+ * Get the value from an SGR attribute.
+ *
+ * This function returns a pointer to the value union from an SGR attribute. Use
+ * the tag to determine which field of the union is valid. Primarily useful in
+ * WebAssembly environments where accessing struct fields directly is difficult.
+ *
+ * @param attr Pointer to the SGR attribute
+ * @return Pointer to the attribute value union
+ *
+ * @ingroup sgr
+ */
+GhosttySgrAttributeValue* ghostty_sgr_attribute_value(
+    GhosttySgrAttribute* attr);
+
+#ifdef __wasm__
+/**
+ * Allocate memory for an SGR attribute (WebAssembly only).
+ *
+ * This is a convenience function for WebAssembly environments to allocate
+ * memory for an SGR attribute structure that can be passed to ghostty_sgr_next.
+ *
+ * @return Pointer to the allocated attribute structure
+ *
+ * @ingroup wasm
+ */
+GhosttySgrAttribute* ghostty_wasm_alloc_sgr_attribute(void);
+
+/**
+ * Free memory for an SGR attribute (WebAssembly only).
+ *
+ * Frees memory allocated by ghostty_wasm_alloc_sgr_attribute.
+ *
+ * @param attr Pointer to the attribute structure to free
+ *
+ * @ingroup wasm
+ */
+void ghostty_wasm_free_sgr_attribute(GhosttySgrAttribute* attr);
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+/** @} */
+
+#endif /* GHOSTTY_VT_SGR_H */

vendor/libghostty/include/ghostty/vt/wasm.h

@@ -0,0 +1,159 @@
+/**
+ * @file wasm.h
+ *
+ * WebAssembly utility functions for libghostty-vt.
+ */
+
+#ifndef GHOSTTY_VT_WASM_H
+#define GHOSTTY_VT_WASM_H
+
+#ifdef __wasm__
+
+#include <stddef.h>
+#include <stdint.h>
+
+/** @defgroup wasm WebAssembly Utilities
+ *
+ * Convenience functions for allocating various types in WebAssembly builds.
+ * **These are only available the libghostty-vt wasm module.**
+ *
+ * Ghostty relies on pointers to various types for ABI compatibility, and
+ * creating those pointers in Wasm can be tedious. These functions provide
+ * a purely additive set of utilities that simplify memory management in
+ * Wasm environments without changing the core C library API.
+ *
+ * @note These functions always use the default allocator. If you need
+ * custom allocation strategies, you should allocate types manually using
+ * your custom allocator. This is a very rare use case in the WebAssembly
+ * world so these are optimized for simplicity.
+ *
+ * ## Example Usage
+ *
+ * Here's a simple example of using the Wasm utilities with the key encoder:
+ *
+ * @code
+ * const { exports } = wasmInstance;
+ * const view = new DataView(wasmMemory.buffer);
+ *
+ * // Create key encoder
+ * const encoderPtr = exports.ghostty_wasm_alloc_opaque();
+ * exports.ghostty_key_encoder_new(null, encoderPtr);
+ * const encoder = view.getUint32(encoder, true);
+ *
+ * // Configure encoder with Kitty protocol flags
+ * const flagsPtr = exports.ghostty_wasm_alloc_u8();
+ * view.setUint8(flagsPtr, 0x1F);
+ * exports.ghostty_key_encoder_setopt(encoder, 5, flagsPtr);
+ *
+ * // Allocate output buffer and size pointer
+ * const bufferSize = 32;
+ * const bufPtr = exports.ghostty_wasm_alloc_u8_array(bufferSize);
+ * const writtenPtr = exports.ghostty_wasm_alloc_usize();
+ *
+ * // Encode the key event
+ * exports.ghostty_key_encoder_encode(
+ *     encoder, eventPtr, bufPtr, bufferSize, writtenPtr
+ * );
+ *
+ * // Read encoded output
+ * const bytesWritten = view.getUint32(writtenPtr, true);
+ * const encoded = new Uint8Array(wasmMemory.buffer, bufPtr, bytesWritten);
+ * @endcode
+ *
+ * @remark The code above is pretty ugly! This is the lowest level interface
+ * to the libghostty-vt Wasm module. In practice, this should be wrapped
+ * in a higher-level API that abstracts away all this.
+ *
+ * @{
+ */
+
+/**
+ * Allocate an opaque pointer. This can be used for any opaque pointer
+ * types such as GhosttyKeyEncoder, GhosttyKeyEvent, etc.
+ *
+ * @return Pointer to allocated opaque pointer, or NULL if allocation failed
+ * @ingroup wasm
+ */
+void** ghostty_wasm_alloc_opaque(void);
+
+/**
+ * Free an opaque pointer allocated by ghostty_wasm_alloc_opaque().
+ *
+ * @param ptr Pointer to free, or NULL (NULL is safely ignored)
+ * @ingroup wasm
+ */
+void ghostty_wasm_free_opaque(void **ptr);
+
+/**
+ * Allocate an array of uint8_t values.
+ *
+ * @param len Number of uint8_t elements to allocate
+ * @return Pointer to allocated array, or NULL if allocation failed
+ * @ingroup wasm
+ */
+uint8_t* ghostty_wasm_alloc_u8_array(size_t len);
+
+/**
+ * Free an array allocated by ghostty_wasm_alloc_u8_array().
+ *
+ * @param ptr Pointer to the array to free, or NULL (NULL is safely ignored)
+ * @param len Length of the array (must match the length passed to alloc)
+ * @ingroup wasm
+ */
+void ghostty_wasm_free_u8_array(uint8_t *ptr, size_t len);
+
+/**
+ * Allocate an array of uint16_t values.
+ *
+ * @param len Number of uint16_t elements to allocate
+ * @return Pointer to allocated array, or NULL if allocation failed
+ * @ingroup wasm
+ */
+uint16_t* ghostty_wasm_alloc_u16_array(size_t len);
+
+/**
+ * Free an array allocated by ghostty_wasm_alloc_u16_array().
+ *
+ * @param ptr Pointer to the array to free, or NULL (NULL is safely ignored)
+ * @param len Length of the array (must match the length passed to alloc)
+ * @ingroup wasm
+ */
+void ghostty_wasm_free_u16_array(uint16_t *ptr, size_t len);
+
+/**
+ * Allocate a single uint8_t value.
+ *
+ * @return Pointer to allocated uint8_t, or NULL if allocation failed
+ * @ingroup wasm
+ */
+uint8_t* ghostty_wasm_alloc_u8(void);
+
+/**
+ * Free a uint8_t allocated by ghostty_wasm_alloc_u8().
+ *
+ * @param ptr Pointer to free, or NULL (NULL is safely ignored)
+ * @ingroup wasm
+ */
+void ghostty_wasm_free_u8(uint8_t *ptr);
+
+/**
+ * Allocate a single size_t value.
+ *
+ * @return Pointer to allocated size_t, or NULL if allocation failed
+ * @ingroup wasm
+ */
+size_t* ghostty_wasm_alloc_usize(void);
+
+/**
+ * Free a size_t allocated by ghostty_wasm_alloc_usize().
+ *
+ * @param ptr Pointer to free, or NULL (NULL is safely ignored)
+ * @ingroup wasm
+ */
+void ghostty_wasm_free_usize(size_t *ptr);
+
+/** @} */
+
+#endif /* __wasm__ */
+
+#endif /* GHOSTTY_VT_WASM_H */