feat: add /context prompt breakdown

src/agents/pi-embedded-runner/run/attempt.ts

@@ -37,6 +37,7 @@ import {
   loadWorkspaceSkillEntries,
   resolveSkillsPromptForRun,
 } from "../../skills.js";
+import { buildSystemPromptReport } from "../../system-prompt-report.js";
 import { filterBootstrapFilesForSession, loadWorkspaceBootstrapFiles } from "../../workspace.js";
 
 import { isAbortError } from "../abort.js";
@@ -62,6 +63,7 @@ import {
   resolveExecToolDefaults,
   resolveUserTimezone,
 } from "../utils.js";
+import { resolveSandboxRuntimeStatus } from "../../sandbox/runtime-status.js";
 
 import type { EmbeddedRunAttemptParams, EmbeddedRunAttemptResult } from "./types.js";
 
@@ -198,6 +200,28 @@ export async function runEmbeddedAttempt(
       userTime,
       contextFiles,
     });
+    const systemPromptReport = buildSystemPromptReport({
+      source: "run",
+      generatedAt: Date.now(),
+      sessionId: params.sessionId,
+      sessionKey: params.sessionKey,
+      provider: params.provider,
+      model: params.modelId,
+      workspaceDir: effectiveWorkspace,
+      bootstrapMaxChars: resolveBootstrapMaxChars(params.config),
+      sandbox: (() => {
+        const runtime = resolveSandboxRuntimeStatus({
+          cfg: params.config,
+          sessionKey: params.sessionKey ?? params.sessionId,
+        });
+        return { mode: runtime.mode, sandboxed: runtime.sandboxed };
+      })(),
+      systemPrompt: appendPrompt,
+      bootstrapFiles,
+      injectedFiles: contextFiles,
+      skillsPrompt,
+      tools,
+    });
     const systemPrompt = createSystemPromptOverride(appendPrompt);
 
     const sessionLock = await acquireSessionWriteLock({
@@ -427,6 +451,7 @@ export async function runEmbeddedAttempt(
         timedOut,
         promptError,
         sessionIdUsed,
+        systemPromptReport,
         messagesSnapshot,
         assistantTexts,
         toolMetas: toolMetasNormalized,