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refactor: move context files to system prompt instead of user messages

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- Context files now appended to system prompt
- Added current date/time to system prompt
- Added current working directory to system prompt
- Date/time and cwd placed at end of system prompt
- Updated README to reflect system prompt integration
This commit is contained in:
Mario Zechner 2025-11-12 22:19:56 +01:00
parent dca3e1cc60
commit b1c2c32e23
2 changed files with 41 additions and 24 deletions
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63
packages/coding-agent/src/main.ts
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@ -131,7 +131,24 @@ ${chalk.bold("Available Tools:")}
`);
}
const DEFAULT_SYSTEM_PROMPT = `You are an expert coding assistant. You help users with coding tasks by reading files, executing commands, editing code, and writing new files.
function buildSystemPrompt(customPrompt?: string): string {
if (customPrompt) {
return customPrompt;
}
const now = new Date();
const dateTime = now.toLocaleString("en-US", {
weekday: "long",
year: "numeric",
month: "long",
day: "numeric",
hour: "2-digit",
minute: "2-digit",
second: "2-digit",
timeZoneName: "short",
});
let prompt = `You are an expert coding assistant. You help users with coding tasks by reading files, executing commands, editing code, and writing new files.
Available tools:
- read: Read file contents
@ -145,9 +162,24 @@ Guidelines:
- Use edit for precise changes (old text must match exactly)
- Use write only for new files or complete rewrites
- Be concise in your responses
- Show file paths clearly when working with files
- Show file paths clearly when working with files`;
Current directory: ${process.cwd()}`;
// Append project context files
const contextFiles = loadProjectContextFiles();
if (contextFiles.length > 0) {
prompt += "\n\n# Project Context\n\n";
prompt += "The following project context files have been loaded:\n\n";
for (const { path: filePath, content } of contextFiles) {
prompt += `## ${filePath}\n\n${content}\n\n`;
}
}
// Add date/time and working directory last
prompt += `\nCurrent date and time: ${dateTime}`;
prompt += `\nCurrent working directory: ${process.cwd()}`;
return prompt;
}
/**
* Look for AGENT.md or CLAUDE.md in a directory (prefers AGENT.md)
@ -407,7 +439,7 @@ export async function main(args: string[]) {
// Create agent
const model = getModel(provider, modelId);
const systemPrompt = parsed.systemPrompt || DEFAULT_SYSTEM_PROMPT;
const systemPrompt = buildSystemPrompt(parsed.systemPrompt);
const agent = new Agent({
initialState: {
@ -479,27 +511,12 @@ export async function main(args: string[]) {
// Note: Session will be started lazily after first user+assistant message exchange
// (unless continuing/resuming, in which case it's already initialized)
// Inject project context files (AGENT.md/CLAUDE.md) if not continuing/resuming
if (!parsed.continue && !parsed.resume) {
// Log loaded context files (they're already in the system prompt)
if (shouldPrintMessages && !parsed.continue && !parsed.resume) {
const contextFiles = loadProjectContextFiles();
if (contextFiles.length > 0) {
// Queue each context file as a separate message
for (const { path: filePath, content } of contextFiles) {
await agent.queueMessage({
role: "user",
content: [
{
type: "text",
text: `[Project Context from ${filePath}]\n\n${content}`,
},
],
timestamp: Date.now(),
});
}
if (shouldPrintMessages) {
const fileList = contextFiles.map((f) => f.path).join(", ");
console.log(chalk.dim(`Loaded project context from: ${fileList}`));
}
const fileList = contextFiles.map((f) => f.path).join(", ");
console.log(chalk.dim(`Loaded project context from: ${fileList}`));
}
}