refactor!: simplify runtime tools and remove replay engines (#572)

* fix(hopper): report unavailable procedure body coverage

* refactor!: simplify runtime tools and remove replay engines

Keep direct inspection, capture, and comparison tools. Bind handlers to named contracts and let agents compose experiments with commands and local fixture servers.

BREAKING CHANGE: Remove controlled replay, Node characterization, finite replay-machine, managed runtime planning, and redundant string-tracing tools. Retire process replay, shims, reactive scenarios, custom checkpoints, and active browser replay and origin-scope inputs.

src/application/ProcessCaptureObservation.test.ts

@@ -2,7 +2,6 @@ import { expect, it } from "vitest";
 
 import { snapshotRoots } from "./FilesystemSnapshot.js";
 import { buildCaptureResult } from "./ProcessCaptureLifecycle.js";
-import { ProcessCheckpoints } from "./ProcessCheckpoints.js";
 import { normalizeProcessSamples } from "./ProcessNormalization.js";
 import { isInitializedPtyRoot, readLinuxChildren } from "./ProcessSampling.js";
 import { TerminalRenderer } from "./TerminalRenderer.js";
@@ -19,7 +18,7 @@ const base = {
   working_directory: "/tmp",
 };
 
-it("returns detached terminal and filesystem checkpoint observations", async () => {
+it("returns detached terminal observations", async () => {
   const observed: string[] = [];
   const renderer = new TerminalRenderer({
     columns: 40,
@@ -46,21 +45,6 @@ it("returns detached terminal and filesystem checkpoint observations", async ()
   expect(reread).toHaveLength(frames.length);
   expect(reread[0]?.cursor_x).toBe(originalCursor);
   await renderer.dispose();
-
-  const scenario = parseProcessScenario(base);
-  const checkpoints = new ProcessCheckpoints(
-    scenario,
-    Date.now(),
-    { files: [], truncated: false },
-    { signal: undefined },
-  );
-  const first = await checkpoints.finish({ files: [], truncated: false });
-  const checkpoint = first[0];
-  if (checkpoint === undefined) throw new Error("expected checkpoint");
-  Reflect.set(checkpoint, "name", "tampered");
-  const second = await checkpoints.finish({ files: [], truncated: false });
-  expect(second[0]?.name).toBe("before");
-  await checkpoints.dispose();
 });
 
 it("preserves rendered observation order instead of timestamp sorting", () => {
@@ -93,14 +77,6 @@ it("preserves rendered observation order instead of timestamp sorting", () => {
     frames: [],
     exit: { exitCode: 0, reason: "exited" },
     samples: [],
-    replay: {
-      httpUrl: "http://127.0.0.1",
-      websocketUrl: "ws://127.0.0.1/ws",
-      events: [],
-      transitions: [],
-      truncated: false,
-      close: () => Promise.resolve(),
-    },
     before: { files: [], truncated: false },
     after: { files: [], truncated: false },
     truncated: false,
@@ -110,7 +86,6 @@ it("preserves rendered observation order instead of timestamp sorting", () => {
     renderedFrames,
     interactions: [],
     checkpoints: capture.filesystem_checkpoints,
-    shimEvents: [],
     settlement: {
       state: capture.settlement.state,
       elapsed_ms: capture.settlement.elapsed_ms,
@@ -128,14 +103,6 @@ it("marks redacted scripted input as an interaction unknown", () => {
     frames: [],
     exit: { exitCode: 0, reason: "exited" },
     samples: [],
-    replay: {
-      httpUrl: "http://127.0.0.1",
-      websocketUrl: "ws://127.0.0.1/ws",
-      events: [],
-      transitions: [],
-      truncated: false,
-      close: () => Promise.resolve(),
-    },
     before: { files: [], truncated: false },
     after: { files: [], truncated: false },
     truncated: false,
@@ -157,7 +124,6 @@ it("marks redacted scripted input as an interaction unknown", () => {
       },
     ],
     checkpoints: capture.filesystem_checkpoints,
-    shimEvents: [],
     settlement: {
       state: capture.settlement.state,
       elapsed_ms: capture.settlement.elapsed_ms,
@@ -259,7 +225,7 @@ it("admits PTY samples only after stable session and token setup", () => {
   ).toBe(true);
 });
 
-it("keeps interaction and shim residual uncertainty in separate scopes", () => {
+it("keeps interaction and process residual uncertainty in separate scopes", () => {
   const baseCapture = emptyCapture();
   const interaction = parseProcessCapture({
     ...baseCapture,
@@ -267,22 +233,24 @@ it("keeps interaction and shim residual uncertainty in separate scopes", () => {
       { scope: "interaction", reason: "Interaction capture was partial." },
     ],
   });
-  const shim = parseProcessCapture({
+  const process = parseProcessCapture({
     ...baseCapture,
-    residual_unknowns: [{ scope: "shim", reason: "Shim capture was partial." }],
+    residual_unknowns: [
+      { scope: "process", reason: "Process sampling was partial." },
+    ],
   });
 
   expect(compareProcessCaptures(interaction, baseCapture)).toMatchObject({
     status: "unknown",
     terminal: "unchanged",
     interaction: "unknown",
-    shim: "unchanged",
+    process: "unchanged",
   });
-  expect(compareProcessCaptures(shim, baseCapture)).toMatchObject({
+  expect(compareProcessCaptures(process, baseCapture)).toMatchObject({
     status: "unknown",
     terminal: "unchanged",
     interaction: "unchanged",
-    shim: "unknown",
+    process: "unknown",
   });
 });