fix: pi.dev command reference transforms and template args passing

src/core/command-generation/adapters/pi.ts

@@ -7,6 +7,20 @@
 
 import path from 'path';
 import type { CommandContent, ToolCommandAdapter } from '../types.js';
+import { transformToHyphenCommands } from '../../../utils/command-references.js';
+
+const PI_INPUT_HEADING = /^\*\*Input\*\*:[^\n]*$/m;
+
+function injectPiArgs(body: string): string {
+  if (body.includes('$@') || body.includes('$ARGUMENTS')) {
+    return body;
+  }
+
+  return body.replace(
+    PI_INPUT_HEADING,
+    (heading) => `${heading}\n**Provided arguments**: $@`
+  );
+}
 
 /**
  * Escapes a string value for safe YAML output.
@@ -27,6 +41,10 @@ function escapeYamlValue(value: string): string {
  * Pi adapter for prompt template generation.
  * File path: .pi/prompts/opsx-<id>.md
  * Frontmatter: description
+ *
+ * Pi uses the filename (minus .md) as the slash command name, so
+ * opsx-propose.md → /opsx-propose. Command references in the body
+ * are transformed from /opsx: to /opsx- for consistency.
  */
 export const piAdapter: ToolCommandAdapter = {
   toolId: 'pi',
@@ -36,11 +54,14 @@ export const piAdapter: ToolCommandAdapter = {
   },
 
   formatFile(content: CommandContent): string {
+    // Transform /opsx: references to /opsx- and inject $@ for template args
+    const transformedBody = transformToHyphenCommands(content.body);
+
     return `---
 description: ${escapeYamlValue(content.description)}
 ---
 
-${content.body}
+${injectPiArgs(transformedBody)}
 `;
   },
 };

src/core/init.ts

@@ -537,8 +537,8 @@ export class InitCommand {
             const skillFile = path.join(skillDir, 'SKILL.md');
 
             // Generate SKILL.md content with YAML frontmatter including generatedBy
-            // Use hyphen-based command references for OpenCode
-            const transformer = tool.value === 'opencode' ? transformToHyphenCommands : undefined;
+            // Use hyphen-based command references for tools where filename = command name
+            const transformer = (tool.value === 'opencode' || tool.value === 'pi') ? transformToHyphenCommands : undefined;
             const skillContent = generateSkillContent(template, OPENSPEC_VERSION, transformer);
 
             // Write the skill file

src/core/update.ts

@@ -195,7 +195,7 @@ export class UpdateCommand {
             const skillFile = path.join(skillDir, 'SKILL.md');
 
             // Use hyphen-based command references for OpenCode
-            const transformer = tool.value === 'opencode' ? transformToHyphenCommands : undefined;
+            const transformer = (tool.value === 'opencode' || tool.value === 'pi') ? transformToHyphenCommands : undefined;
             const skillContent = generateSkillContent(template, OPENSPEC_VERSION, transformer);
             await FileSystemUtils.writeFile(skillFile, skillContent);
           }
@@ -666,7 +666,7 @@ export class UpdateCommand {
             const skillFile = path.join(skillDir, 'SKILL.md');
 
             // Use hyphen-based command references for OpenCode
-            const transformer = tool.value === 'opencode' ? transformToHyphenCommands : undefined;
+            const transformer = (tool.value === 'opencode' || tool.value === 'pi') ? transformToHyphenCommands : undefined;
             const skillContent = generateSkillContent(template, OPENSPEC_VERSION, transformer);
             await FileSystemUtils.writeFile(skillFile, skillContent);
           }

test/core/command-generation/adapters.test.ts

@@ -547,6 +547,28 @@ describe('command-generation/adapters', () => {
       expect(output).toContain('This is the command body.');
     });
 
+    it('should transform command references from colon to hyphen format', () => {
+      const contentWithRefs: CommandContent = {
+        ...sampleContent,
+        body: 'Run /opsx:apply to implement. Then /opsx:archive when done.',
+      };
+
+      const output = piAdapter.formatFile(contentWithRefs);
+      expect(output).toContain('/opsx-apply');
+      expect(output).toContain('/opsx-archive');
+      expect(output).not.toContain('/opsx:apply');
+    });
+
+    it('should inject template arguments into the input section', () => {
+      const contentWithInput: CommandContent = {
+        ...sampleContent,
+        body: '**Input**: The argument after `/opsx:explore` is the topic.\n\n**Steps**\n1. Think.',
+      };
+
+      const output = piAdapter.formatFile(contentWithInput);
+      expect(output).toContain('**Provided arguments**: $@');
+    });
+
     it('should escape YAML special characters in description', () => {
       const contentWithSpecialChars: CommandContent = {
         ...sampleContent,

test/core/update.test.ts

@@ -250,6 +250,7 @@ Old instructions content
         expect(exists).toBe(false);
       }
     });
+
   });
 
   describe('multi-tool support', () => {