fix: Rename C SDK files to un.c/un.h to match naming convention

- Renamed src/unsandbox.c -> src/un.c
- Renamed src/unsandbox.h -> src/un.h
- Updated all references in Makefile, README.md, IMPLEMENTATION.md
- Matches un.py, un.js, un.go, etc. naming pattern

clients/c/IMPLEMENTATION.md

@@ -2,7 +2,7 @@
 
 ## Overview
 
-Complete, production-ready C SDK for unsandbox.com API with full support for code execution, async jobs, language detection, and credential management.
+Complete, production-ready C SDK for un.com API with full support for code execution, async jobs, language detection, and credential management.
 
 ## Files Created/Modified
 
@@ -15,7 +15,7 @@ Complete, production-ready C SDK for unsandbox.com API with full support for cod
 - Proper extern "C" guards for C++ compatibility
 - Memory-safe with dedicated free functions
 
-#### `/clients/c/src/unsandbox.c` (823 lines)
+#### `/clients/c/src/un.c` (823 lines)
 - Full implementation with production-quality error handling
 - Core execution functions (sync, async, wait, get, cancel, list)
 - Language detection with 48 file extensions
@@ -170,7 +170,7 @@ $ cd clients/c && make clean && make test
 [✓] Test binary ready
 
 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
-LIBRARY MODE: Testing unsandbox.c functions
+LIBRARY MODE: Testing un.c functions
 ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
 
 Testing SHA-256...
@@ -316,7 +316,7 @@ make test
 make clean
 
 # Manual compilation
-gcc -O2 -Wall -Wextra -o myapp myapp.c src/unsandbox.c -Isrc -lcurl -lssl -lcrypto
+gcc -O2 -Wall -Wextra -o myapp myapp.c src/un.c -Isrc -lcurl -lssl -lcrypto
 ```
 
 ## Performance Characteristics
@@ -348,7 +348,7 @@ All 22 tests passing with 0 failures.
 
 ## Code Statistics
 
-- **src/unsandbox.c**: 823 lines (implementation)
+- **src/un.c**: 823 lines (implementation)
 - **src/unsandbox.h**: 311 lines (header)
 - **examples/hello_world.c**: 121 lines
 - **examples/fibonacci.c**: 217 lines
@@ -398,7 +398,7 @@ Use freely for any purpose without restriction.
 
 ## References
 
-- API Base: https://api.unsandbox.com
+- API Base: https://api.un.com
 - Python SDK: `../python/sync/src/un.py`
 - Go SDK: `../go/sync/src/un.go`
 - Ruby SDK: `../ruby/sync/src/un.rb`

clients/c/Makefile

@@ -17,8 +17,8 @@
 # Paths
 ROOT_DIR := $(shell cd ../.. && pwd)
 SRC_DIR := src
-SRC := $(SRC_DIR)/unsandbox.c
-HEADER := $(SRC_DIR)/unsandbox.h
+SRC := $(SRC_DIR)/un.c
+HEADER := $(SRC_DIR)/un.h
 BIN := un
 TEST_DIR := tests
 EXAMPLES_DIR := examples
@@ -60,8 +60,8 @@ build: lib examples
 
 lib: $(SRC) $(HEADER)
 	@echo "$(GREEN)✓$(NC) Library files ready:"
-	@echo "  - $(SRC_DIR)/unsandbox.c (implementation)"
-	@echo "  - $(SRC_DIR)/unsandbox.h (header)"
+	@echo "  - $(SRC_DIR)/un.c (implementation)"
+	@echo "  - $(SRC_DIR)/un.h (header)"
 
 examples: $(EXAMPLES_DIR)/hello_world $(EXAMPLES_DIR)/fibonacci
 	@echo "$(GREEN)✓$(NC) Examples built"
@@ -89,7 +89,7 @@ deps:
 test: build $(TEST_DIR)/test_library
 	@echo ""
 	@echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
-	@echo "LIBRARY MODE: Testing unsandbox.c functions"
+	@echo "LIBRARY MODE: Testing un.c functions"
 	@echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
 	@echo ""
 	@./$(TEST_DIR)/test_library

clients/c/README.md

@@ -1,6 +1,6 @@
-# unsandbox.com C SDK
+# un.com C SDK
 
-A complete, production-ready C SDK for the unsandbox.com code execution API.
+A complete, production-ready C SDK for the un.com code execution API.
 
 ## Features
 
@@ -30,7 +30,7 @@ sudo apt install build-essential libcurl4-openssl-dev libssl-dev
 cd clients/c
 make
 
-# Just build the library (src/unsandbox.c and src/unsandbox.h)
+# Just build the library (src/un.c and src/unsandbox.h)
 make lib
 
 # Build examples (hello_world, fibonacci)
@@ -76,7 +76,7 @@ int main(void) {
 Compile:
 
 ```bash
-gcc -o myapp myapp.c src/unsandbox.c -Isrc -lcurl -lssl -lcrypto
+gcc -o myapp myapp.c src/un.c -Isrc -lcurl -lssl -lcrypto
 ```
 
 ### Examples
@@ -106,7 +106,7 @@ Run the example:
 
 ```bash
 cd examples
-gcc -o hello_world hello_world.c ../src/unsandbox.c -I../src -lcurl -lssl -lcrypto
+gcc -o hello_world hello_world.c ../src/un.c -I../src -lcurl -lssl -lcrypto
 ./hello_world
 ```
 
@@ -466,7 +466,7 @@ export UNSANDBOX_SECRET_KEY="your-secret"
 
 Check your credentials are valid:
 ```bash
-curl -H "Authorization: Bearer $UNSANDBOX_PUBLIC_KEY" https://api.unsandbox.com/health
+curl -H "Authorization: Bearer $UNSANDBOX_PUBLIC_KEY" https://api.un.com/health
 ```
 
 ### Compilation errors
@@ -478,7 +478,7 @@ sudo apt install libcurl4-openssl-dev libssl-dev
 
 Check include paths:
 ```bash
-gcc -I/usr/include -c src/unsandbox.c
+gcc -I/usr/include -c src/un.c
 ```
 
 ## License
@@ -496,7 +496,7 @@ Compile examples:
 ```bash
 cd examples
 make -C .. examples  # Or:
-gcc -o hello_world hello_world.c ../src/unsandbox.c -I../src -lcurl -lssl -lcrypto
+gcc -o hello_world hello_world.c ../src/un.c -I../src -lcurl -lssl -lcrypto
 ./hello_world
 ```
 
@@ -504,4 +504,4 @@ gcc -o hello_world hello_world.c ../src/unsandbox.c -I../src -lcurl -lssl -lcryp
 
 - Python SDK: `../python/sync/src/un.py`
 - Go SDK: `../go/sync/src/un.go`
-- API Documentation: `https://api.unsandbox.com/`
+- API Documentation: `https://api.un.com/`

clients/c/examples/README.md

@@ -563,4 +563,4 @@ apt install libcurl4-openssl-dev libwebsockets-dev libssl-dev
 - See `../Makefile` for compilation and testing infrastructure
 - See `../tests/test_library.c` for unit test patterns
 - See `../../un.c` for full library implementation
-- Visit https://unsandbox.com for API documentation
+- Visit https://un.com for API documentation

clients/c/src/un.c

@@ -4,7 +4,7 @@
  * unsandbox.com C SDK Implementation
  */
 
-#include "unsandbox.h"
+#include "un.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

clients/c/src/un.h

@@ -4,7 +4,7 @@
  * unsandbox.com C SDK (Synchronous)
  *
  * Library Usage:
- *     #include "unsandbox.h"
+ *     #include "un.h"
  *
  *     // Execute code synchronously
  *     unsandbox_result_t *result = unsandbox_execute("python", "print(42)", NULL, NULL);