refactor(agents): share profile prompt identity helpers

Author: Waishnav

src/cli.ts

@@ -13,6 +13,7 @@ import { satisfies } from "semver";
 import { loadConfig } from "./config.js";
 import { runLocalAgentProvider } from "./local-agent-adapters.js";
 import {
+  buildLocalAgentProfilePrompt,
   isLocalAgentProvider,
   loadLocalAgentProfiles,
   LOCAL_AGENT_PROVIDERS,
@@ -569,8 +570,7 @@ async function runLocalAgentProfile(
   record: LocalAgentRecord,
   prompt: string,
 ): Promise<LocalAgentRunResult> {
-  const body = profile.body.trim();
-  const fullPrompt = body ? `${body}\n\nTask:\n${prompt}` : prompt;
+  const fullPrompt = buildLocalAgentProfilePrompt(profile, prompt);
   return runLocalAgentProvider(profile.provider, {
     prompt: fullPrompt,
     workspace: record.workspaceRoot,

src/local-agent-profiles.test.ts

@@ -3,7 +3,12 @@ import { mkdtemp, mkdir, rm, writeFile } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { join } from "node:path";
 import { loadConfig } from "./config.js";
-import { loadLocalAgentProfiles, summarizeLocalAgentProfile } from "./local-agent-profiles.js";
+import {
+  buildLocalAgentProfilePrompt,
+  fingerprintLocalAgentProfile,
+  loadLocalAgentProfiles,
+  summarizeLocalAgentProfile,
+} from "./local-agent-profiles.js";
 import type { ServerConfig } from "./config.js";
 
 const root = await mkdtemp(join(tmpdir(), "devspace-agent-profiles-test-"));
@@ -73,6 +78,15 @@ try {
   assert.equal(profiles[0]?.model, "sonnet");
   assert.equal(profiles[0]?.effort, "high");
   assert.equal(profiles[0]?.body, "Project body.");
+  assert.equal(
+    buildLocalAgentProfilePrompt(profiles[0]!, "Review auth"),
+    "Project body.\n\nTask:\nReview auth",
+  );
+  assert.equal(fingerprintLocalAgentProfile(profiles[0]!).length, 64);
+  assert.notEqual(
+    fingerprintLocalAgentProfile(profiles[0]!),
+    fingerprintLocalAgentProfile({ ...profiles[0]!, body: "Changed body." }),
+  );
   assert.deepEqual(summarizeLocalAgentProfile(profiles[0]!), {
     name: "reviewer",
     description: "Project reviewer #1.",

src/local-agent-profiles.ts

@@ -1,3 +1,4 @@
+import { createHash } from "node:crypto";
 import { existsSync } from "node:fs";
 import { readdir, readFile } from "node:fs/promises";
 import { basename, join, resolve } from "node:path";
@@ -77,6 +78,29 @@ export function summarizeLocalAgentProfile(
   };
 }
 
+export function fingerprintLocalAgentProfile(profile: LocalAgentProfile): string {
+  return createHash("sha256")
+    .update(
+      JSON.stringify({
+        name: profile.name,
+        description: profile.description,
+        provider: profile.provider,
+        model: profile.model ?? null,
+        effort: profile.effort ?? null,
+        body: profile.body,
+      }),
+    )
+    .digest("hex");
+}
+
+export function buildLocalAgentProfilePrompt(
+  profile: Pick<LocalAgentProfile, "body">,
+  task: string,
+): string {
+  const body = profile.body.trim();
+  return body ? `${body}\n\nTask:\n${task}` : task;
+}
+
 async function loadProfilesFromDirectory(directory: string): Promise<LocalAgentProfile[]> {
   const resolvedDirectory = resolve(directory);
   if (!existsSync(resolvedDirectory)) return [];