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| private _rebuildSystemPrompt(toolNames: string[]): string {
const validToolNames = toolNames.filter((name) => this._toolRegistry.has(name));
const toolSnippets: Record<string, string> = {};
const promptGuidelines: string[] = [];
for (const name of validToolNames) {
const snippet = this._toolPromptSnippets.get(name);
if (snippet) {
toolSnippets[name] = snippet;
}
const toolGuidelines = this._toolPromptGuidelines.get(name);
if (toolGuidelines) {
promptGuidelines.push(...toolGuidelines);
}
}
const loaderSystemPrompt = this._resourceLoader.getSystemPrompt();
const loaderAppendSystemPrompt = this._resourceLoader.getAppendSystemPrompt();
const appendSystemPrompt =
loaderAppendSystemPrompt.length > 0 ? loaderAppendSystemPrompt.join("\n\n") : undefined;
const loadedSkills = this._resourceLoader.getSkills().skills;
const loadedContextFiles = this._resourceLoader.getAgentsFiles().agentsFiles;
this._baseSystemPromptOptions = {
cwd: this._cwd,
skills: loadedSkills,
contextFiles: loadedContextFiles,
customPrompt: loaderSystemPrompt,
appendSystemPrompt,
selectedTools: validToolNames,
toolSnippets,
promptGuidelines,
};
return buildSystemPrompt(this._baseSystemPromptOptions);
}
export function buildSystemPrompt(options: BuildSystemPromptOptions): string {
const {
customPrompt,
selectedTools,
toolSnippets,
promptGuidelines,
appendSystemPrompt,
cwd,
contextFiles: providedContextFiles,
skills: providedSkills,
} = options;
const promptCwd = cwd.replace(/\\/g, "/");
const appendSection = appendSystemPrompt ? `\n\n${appendSystemPrompt}` : "";
const contextFiles = providedContextFiles ?? [];
const skills = providedSkills ?? [];
if (customPrompt) {
let prompt = customPrompt;
if (appendSection) {
prompt += appendSection;
}
if (contextFiles.length > 0) {
prompt += "\n\n<project_context>\n\n";
prompt += "Project-specific instructions and guidelines:\n\n";
for (const { path: filePath, content } of contextFiles) {
prompt += `<project_instructions path="${filePath}">\n${content}\n</project_instructions>\n\n`;
}
prompt += "</project_context>\n";
}
const customPromptHasRead = !selectedTools || selectedTools.includes("read");
if (customPromptHasRead && skills.length > 0) {
prompt += formatSkillsForPrompt(skills);
}
prompt += `\nCurrent working directory: ${promptCwd}`;
return prompt;
}
const readmePath = getReadmePath();
const docsPath = getDocsPath();
const examplesPath = getExamplesPath();
const tools = selectedTools || ["read", "bash", "edit", "write"];
const visibleTools = tools.filter((name) => !!toolSnippets?.[name]);
const toolsList =
visibleTools.length > 0 ? visibleTools.map((name) => `- ${name}: ${toolSnippets![name]}`).join("\n") : "(none)";
const guidelinesList: string[] = [];
const guidelinesSet = new Set<string>();
const addGuideline = (guideline: string): void => {
if (guidelinesSet.has(guideline)) {
return;
}
guidelinesSet.add(guideline);
guidelinesList.push(guideline);
};
const hasBash = tools.includes("bash");
const hasGrep = tools.includes("grep");
const hasFind = tools.includes("find");
const hasLs = tools.includes("ls");
const hasRead = tools.includes("read");
if (hasBash && !hasGrep && !hasFind && !hasLs) {
addGuideline("Use bash for file operations like ls, rg, find");
}
for (const guideline of promptGuidelines ?? []) {
const normalized = guideline.trim();
if (normalized.length > 0) {
addGuideline(normalized);
}
}
addGuideline("Be concise in your responses");
addGuideline("Show file paths clearly when working with files");
const guidelines = guidelinesList.map((g) => `- ${g}`).join("\n");
let prompt = `You are an expert coding assistant operating inside pi, a coding agent harness. You help users by reading files, executing commands, editing code, and writing new files.
Available tools:
${toolsList}
In addition to the tools above, you may have access to other custom tools depending on the project.
Guidelines:
${guidelines}
Pi documentation (read only when the user asks about pi itself, its SDK, extensions, themes, skills, or TUI):
- Main documentation: ${readmePath}
- Additional docs: ${docsPath}
- Examples: ${examplesPath} (extensions, custom tools, SDK)
- When reading pi docs or examples, resolve docs/... under Additional docs and examples/... under Examples, not the current working directory
- When asked about: extensions (docs/extensions.md, examples/extensions/), themes (docs/themes.md), skills (docs/skills.md), prompt templates (docs/prompt-templates.md), TUI components (docs/tui.md), keybindings (docs/keybindings.md), SDK integrations (docs/sdk.md), custom providers (docs/custom-provider.md), adding models (docs/models.md), pi packages (docs/packages.md), environment variables (docs/environment-variables.md)
- When working on pi topics, read the docs and examples, and follow .md cross-references before implementing
- Always read pi .md files completely and follow links to related docs (e.g., tui.md for TUI API details)`;
if (appendSection) {
prompt += appendSection;
}
if (contextFiles.length > 0) {
prompt += "\n\n<project_context>\n\n";
prompt += "Project-specific instructions and guidelines:\n\n";
for (const { path: filePath, content } of contextFiles) {
prompt += `<project_instructions path="${filePath}">\n${content}\n</project_instructions>\n\n`;
}
prompt += "</project_context>\n";
}
if (hasRead && skills.length > 0) {
prompt += formatSkillsForPrompt(skills);
}
prompt += `\nCurrent working directory: ${promptCwd}`;
return prompt;
}
|