chore: remove cortex_prompt.txt (now in cortex-prompt-harness)

- Remove cortex_prompt.txt from repository root
- Update documentation in core.rs to reflect new architecture
- System prompt is now centralized in cortex-prompt-harness crate

The prompt content is now the canonical source in:
cortex_prompt_harness::prompts::CORTEX_MAIN_PROMPT

Author: echobt

Cargo.lock

@@ -482,8 +482,7 @@ mod tests {
 
     #[test]
     fn test_tool_definition_with_category() {
-        let tool = ToolDefinition::new("Read", "Read file contents")
-            .with_category("Perception");
+        let tool = ToolDefinition::new("Read", "Read file contents").with_category("Perception");
 
         assert_eq!(tool.name, "Read");
         assert_eq!(tool.category, Some("Perception".to_string()));
@@ -515,9 +514,7 @@ mod tests {
 
     #[test]
     fn test_prompt_context_combined_tools() {
-        let initial_tools = vec![
-            ToolDefinition::new("Read", "Read files"),
-        ];
+        let initial_tools = vec![ToolDefinition::new("Read", "Read files")];
         let context = PromptContext::new()
             .with_tools(initial_tools)
             .add_tool(ToolDefinition::new("Write", "Write files"));

cortex_prompt.txt

@@ -636,8 +636,11 @@ impl Default for CortexPromptBuilder {
 ///
 /// # Usage
 ///
-/// This prompt is loaded via `include_str!` from `cortex_prompt.txt` in the
-/// main cortex-engine, but the canonical version is defined here.
+/// This is the canonical source for the Cortex system prompt. It is used
+/// directly by cortex-engine via `cortex_prompt_harness::prompts::CORTEX_MAIN_PROMPT`.
+///
+/// For dynamic prompt building with custom sections and tools, use
+/// [`CortexPromptBuilder`] instead.
 pub const CORTEX_MAIN_PROMPT: &str = r#"# CORTEX
 
 You are **Cortex**, an autonomous software engineering intelligence.
@@ -1182,10 +1185,7 @@ mod tests {
     #[test]
     fn test_builder_with_tools() {
         let prompt = CortexPromptBuilder::new()
-            .with_tools(&[
-                ("Tool1", "Description 1"),
-                ("Tool2", "Description 2"),
-            ])
+            .with_tools(&[("Tool1", "Description 1"), ("Tool2", "Description 2")])
             .build();
 
         assert!(prompt.contains("`Tool1`"));
@@ -1220,9 +1220,7 @@ mod tests {
     fn test_builder_custom_toolkit_replaces_add_tool() {
         let prompt = CortexPromptBuilder::new()
             .add_tool("FirstTool", "Should be replaced")
-            .with_custom_toolkit(&[
-                ("FinalTool", "Final description"),
-            ])
+            .with_custom_toolkit(&[("FinalTool", "Final description")])
             .build();
 
         assert!(!prompt.contains("FirstTool"));
@@ -1234,7 +1232,10 @@ mod tests {
     #[test]
     fn test_builder_add_custom_section() {
         let prompt = CortexPromptBuilder::new()
-            .add_custom_section("SPECIAL RULES", "## SPECIAL RULES\n\nFollow these special rules...")
+            .add_custom_section(
+                "SPECIAL RULES",
+                "## SPECIAL RULES\n\nFollow these special rules...",
+            )
             .build();
 
         assert!(prompt.contains("## SPECIAL RULES"));
@@ -1243,8 +1244,7 @@ mod tests {
 
     #[test]
     fn test_builder_is_section_enabled() {
-        let builder = CortexPromptBuilder::new()
-            .without_section("ANTI-PATTERNS");
+        let builder = CortexPromptBuilder::new().without_section("ANTI-PATTERNS");
 
         assert!(builder.is_section_enabled("PRIME DIRECTIVES"));
         assert!(builder.is_section_enabled("TOOLKIT"));

src/cortex-prompt-harness/src/context.rs

@@ -48,7 +48,7 @@ pub use agents::{
     TITLE_AGENT_PROMPT,
 };
 pub use core::{
-    CortexPromptBuilder, CORTEX_MAIN_PROMPT, SECTION_ANTI_PATTERNS, SECTION_CODE_DISCIPLINE,
+    CORTEX_MAIN_PROMPT, CortexPromptBuilder, SECTION_ANTI_PATTERNS, SECTION_CODE_DISCIPLINE,
     SECTION_COGNITIVE_ARCHITECTURE, SECTION_FAILURE_PROTOCOL, SECTION_HEADER, SECTION_NAMES,
     SECTION_OUTPUT_FORMAT, SECTION_PRIME_DIRECTIVES, SECTION_QUALITY_CHECKPOINTS,
     SECTION_RESPONSE_PATTERNS, SECTION_TOOLKIT, TUI_SYSTEM_PROMPT_TEMPLATE,

src/cortex-prompt-harness/src/prompts/core.rs

@@ -555,8 +555,12 @@ mod tests {
         let rendered = section.render();
 
         // Alpha should come before Zebra (alphabetically)
-        let alpha_pos = rendered.find("### Alpha").expect("Alpha category should exist");
-        let zebra_pos = rendered.find("### Zebra").expect("Zebra category should exist");
+        let alpha_pos = rendered
+            .find("### Alpha")
+            .expect("Alpha category should exist");
+        let zebra_pos = rendered
+            .find("### Zebra")
+            .expect("Zebra category should exist");
         assert!(
             alpha_pos < zebra_pos,
             "Alpha should appear before Zebra in sorted output"