feat: thread jam personality into trace, verify, and commit prompts

Author: sunilp

src/commands/commit.ts

@@ -143,7 +143,7 @@ export function buildCommitSystemPrompt(
     // Compact for small models
     const format = convention?.format ?? detected?.format ?? 'type(scope): short description';
     return [
-      `Generate a commit message for the code changes described.`,
+      `You are Jam. Write a commit message for this diff.`,
       `Output ONLY the commit message, nothing else — no explanation, no prefix, no markdown.`,
       `Format: ${format}`,
       ...(convention?.types?.length ? [`Types: ${convention.types.join(', ')}`] : []),
@@ -159,7 +159,7 @@ export function buildCommitSystemPrompt(
   const examples = detected?.examples ?? [];
 
   const sections: string[] = [
-    'You are an expert software engineer. Given a git diff, generate a concise commit message.',
+    'You are Jam. Given a git diff, write a clear, concise commit message.',
     '',
   ];
 
@@ -211,8 +211,8 @@ export function buildCommitSystemPrompt(
 
 // ── Legacy prompts (fallback) ───────────────────────────────────────────────
 
-const SYSTEM_PROMPT = `You are an expert software engineer. Given a git diff, generate a concise \
-commit message following the Conventional Commits specification.
+const SYSTEM_PROMPT = `You are Jam. Given a git diff, write a clear, concise commit message \
+following the Conventional Commits specification.
 
 Rules:
 - Format: <type>(<scope>): <short description>
@@ -226,7 +226,7 @@ Rules:
  * Compact system prompt for small/embedded models that struggle with
  * long instructions. No example — examples cause small models to echo them.
  */
-const SYSTEM_PROMPT_SMALL = `Generate a conventional commit message for the code changes described.
+const SYSTEM_PROMPT_SMALL = `You are Jam. Write a conventional commit message for this diff.
 Output ONLY the commit message, nothing else — no explanation, no prefix, no markdown.
 Format: type(scope): short description
 Types: feat, fix, docs, style, refactor, perf, test, chore

src/commands/trace.ts

@@ -196,7 +196,7 @@ async function runTraceV2(
 
         const graphContext = formatGraphForAIV2(result, 8000);
         const prompt = [
-          'Analyze this call graph and explain the flow to a developer:',
+          'Here\'s the call graph. Walk through the flow and flag anything that looks off:',
           '',
           graphContext,
           '',
@@ -214,7 +214,7 @@ async function runTraceV2(
           model: profile.model,
           temperature: profile.temperature ?? 0.3,
           maxTokens: profile.maxTokens ?? 1024,
-          systemPrompt: 'You are a senior software architect analyzing a codebase. Be concise and insightful.',
+          systemPrompt: 'You are Jam, a senior software architect. Be direct, be specific. If something looks wrong, say so.',
         };
 
         if (config.cacheEnabled) {
@@ -330,7 +330,7 @@ async function runTraceLegacy(
 
       const graphContext = formatGraphForAILegacy(graph);
       const prompt = [
-        'Analyze this call graph and explain the flow to a developer:',
+        'Here\'s the call graph. Walk through the flow and flag anything that looks off:',
         '',
         graphContext,
         '',

src/commands/verify.ts

@@ -350,7 +350,7 @@ async function checkAiRisk(
   const truncatedDiff = diff.length > 15000 ? diff.slice(0, 15000) + '\n... (truncated)' : diff;
 
   const prompt = [
-    'You are a code review safety validator. Analyze this diff and respond with ONLY a JSON object (no markdown, no code fences):',
+    'You are Jam, reviewing this diff for safety issues. Respond with ONLY a JSON object (no markdown, no code fences):',
     '',
     '{"risk": "low|medium|high|critical", "score": 0.0-1.0, "findings": ["issue1", "issue2"], "summary": "one sentence"}',
     '',