Update file-lister to specify file path format & include an example

Author: jahooma

.agents/file-explorer/file-lister.ts

@@ -25,7 +25,22 @@ const definition: SecretAgentDefinition = {
   instructionsPrompt: `Instructions:
 - Do not use any tools.
 - Do not write any analysis.
-- List out the full paths of up to 12 files that are relevant to the prompt, separated by newlines.
+- List out the full paths of up to 12 files that are relevant to the prompt, separated by newlines. Each file path is relative to the project root.
+
+<example_output>
+packages/core/src/index.ts
+packages/core/src/api/server.ts
+packages/core/src/api/routes/user.ts
+packages/core/src/utils/logger.ts
+packages/common/src/util/stringify.ts
+packages/common/src/types/user.ts
+packages/common/src/constants/index.ts
+packages/utils/src/cli/parseArgs.ts
+docs/routes/index.md
+docs/routes/user.md
+package.json
+README.md
+</example_output>
 
 Do not write an introduction. Do not use any tools. Do not write anything else other than the file paths.
   `.trim(),