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fix(coding-agent): built-in tools work like extension tools

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Export readToolDefinition / createReadToolDefinition and the equivalent built-in ToolDefinition APIs from @mariozechner/pi-coding-agent.
This commit is contained in:
Mario Zechner
2026-03-22 04:20:28 +01:00
parent 80f527ec22
commit 235b247f1f
32 changed files with 2594 additions and 1408 deletions
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48
packages/coding-agent/src/core/system-prompt.ts
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@@ -5,17 +5,6 @@
import { getDocsPath, getExamplesPath, getReadmePath } from "../config.js";
import { formatSkillsForPrompt, type Skill } from "./skills.js";
/** Tool descriptions for system prompt */
const toolDescriptions: Record<string, string> = {
read: "Read file contents",
bash: "Execute bash commands (ls, grep, find, etc.)",
edit: "Make surgical edits to files (find exact text and replace)",
write: "Create or overwrite files",
grep: "Search file contents for patterns (respects .gitignore)",
find: "Find files by glob pattern (respects .gitignore)",
ls: "List directory contents",
};
export interface BuildSystemPromptOptions {
/** Custom system prompt (replaces default). */
customPrompt?: string;
@@ -92,18 +81,11 @@ export function buildSystemPrompt(options: BuildSystemPromptOptions = {}): strin
const examplesPath = getExamplesPath();
// Build tools list based on selected tools.
// Built-ins use toolDescriptions. Custom tools can provide one-line snippets.
// A tool appears in Available tools only when the caller provides a one-line snippet.
const tools = selectedTools || ["read", "bash", "edit", "write"];
const visibleTools = tools.filter((name) => name in toolDescriptions || toolSnippets?.[name]);
const visibleTools = tools.filter((name) => !!toolSnippets?.[name]);
const toolsList =
visibleTools.length > 0
? visibleTools
.map((name) => {
const snippet = toolSnippets?.[name] ?? toolDescriptions[name] ?? name;
return `- ${name}: ${snippet}`;
})
.join("\n")
: "(none)";
visibleTools.length > 0 ? visibleTools.map((name) => `- ${name}: ${toolSnippets![name]}`).join("\n") : "(none)";
// Build guidelines based on which tools are actually available
const guidelinesList: string[] = [];
@@ -117,8 +99,6 @@ export function buildSystemPrompt(options: BuildSystemPromptOptions = {}): strin
};
const hasBash = tools.includes("bash");
const hasEdit = tools.includes("edit");
const hasWrite = tools.includes("write");
const hasGrep = tools.includes("grep");
const hasFind = tools.includes("find");
const hasLs = tools.includes("ls");
@@ -131,28 +111,6 @@ export function buildSystemPrompt(options: BuildSystemPromptOptions = {}): strin
addGuideline("Prefer grep/find/ls tools over bash for file exploration (faster, respects .gitignore)");
}
// Read before edit guideline
if (hasRead && hasEdit) {
addGuideline("Use read to examine files before editing. You must use this tool instead of cat or sed.");
}
// Edit guideline
if (hasEdit) {
addGuideline("Use edit for precise changes (old text must match exactly)");
}
// Write guideline
if (hasWrite) {
addGuideline("Use write only for new files or complete rewrites");
}
// Output guideline (only when actually writing or executing)
if (hasEdit || hasWrite) {
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) {