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fix(coding-agent): add tool promptGuidelines support fixes #1720

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This commit is contained in:
Mario Zechner
2026-03-02 22:50:08 +01:00
parent bc2fa8d6d0
commit 8d4a49487a
9 changed files with 96 additions and 10 deletions
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34
packages/coding-agent/src/core/system-prompt.ts
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@@ -23,6 +23,8 @@ export interface BuildSystemPromptOptions {
selectedTools?: string[];
/** Optional one-line tool snippets keyed by tool name. */
toolSnippets?: Record<string, string>;
/** Additional guideline bullets appended to the default system prompt guidelines. */
promptGuidelines?: string[];
/** Text to append to system prompt. */
appendSystemPrompt?: string;
/** Working directory. Default: process.cwd() */
@@ -39,6 +41,7 @@ export function buildSystemPrompt(options: BuildSystemPromptOptions = {}): strin
customPrompt,
selectedTools,
toolSnippets,
promptGuidelines,
appendSystemPrompt,
cwd,
contextFiles: providedContextFiles,
@@ -112,6 +115,14 @@ export function buildSystemPrompt(options: BuildSystemPromptOptions = {}): strin
// Build guidelines based on which tools are actually available
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 hasEdit = tools.includes("edit");
@@ -123,36 +134,43 @@ export function buildSystemPrompt(options: BuildSystemPromptOptions = {}): strin
// File exploration guidelines
if (hasBash && !hasGrep && !hasFind && !hasLs) {
guidelinesList.push("Use bash for file operations like ls, rg, find");
addGuideline("Use bash for file operations like ls, rg, find");
} else if (hasBash && (hasGrep || hasFind || hasLs)) {
guidelinesList.push("Prefer grep/find/ls tools over bash for file exploration (faster, respects .gitignore)");
addGuideline("Prefer grep/find/ls tools over bash for file exploration (faster, respects .gitignore)");
}
// Read before edit guideline
if (hasRead && hasEdit) {
guidelinesList.push("Use read to examine files before editing. You must use this tool instead of cat or sed.");
addGuideline("Use read to examine files before editing. You must use this tool instead of cat or sed.");
}
// Edit guideline
if (hasEdit) {
guidelinesList.push("Use edit for precise changes (old text must match exactly)");
addGuideline("Use edit for precise changes (old text must match exactly)");
}
// Write guideline
if (hasWrite) {
guidelinesList.push("Use write only for new files or complete rewrites");
addGuideline("Use write only for new files or complete rewrites");
}
// Output guideline (only when actually writing or executing)
if (hasEdit || hasWrite) {
guidelinesList.push(
addGuideline(
"When summarizing your actions, output plain text directly - do NOT use cat or bash to display what you did",
);
}
for (const guideline of promptGuidelines ?? []) {
const normalized = guideline.trim();
if (normalized.length > 0) {
addGuideline(normalized);
}
}
// Always include these
guidelinesList.push("Be concise in your responses");
guidelinesList.push("Show file paths clearly when working with files");
addGuideline("Be concise in your responses");
addGuideline("Show file paths clearly when working with files");
const guidelines = guidelinesList.map((g) => `- ${g}`).join("\n");