diff --git a/packages/paperclip-runner/runner/crates/runner-core/src/bin/fake-codex-app-server.rs b/packages/paperclip-runner/runner/crates/runner-core/src/bin/fake-codex-app-server.rs
index 3490a4c1b0..18059de632 100644
--- a/packages/paperclip-runner/runner/crates/runner-core/src/bin/fake-codex-app-server.rs
+++ b/packages/paperclip-runner/runner/crates/runner-core/src/bin/fake-codex-app-server.rs
@@ -1619,56 +1619,71 @@ fn run() -> Result<(), Box<dyn std::error::Error>> {
                         }))?;
                     }
                     if emit_post_completion_passive_statuses {
-                        if let Some(gate) = post_completion_notification_gate.as_ref() {
-                            let deadline = std::time::Instant::now() + Duration::from_secs(5);
-                            while !gate.is_file() {
-                                if std::time::Instant::now() >= deadline {
-                                    return Err(
-                                        "post-completion notification gate timed out".into()
-                                    );
+                        let gate = post_completion_notification_gate.clone();
+                        let thread_id = state.thread_id.clone();
+                        let tail_turn_id = provider_turn_id.clone();
+                        // Goal reconciliation reads must remain responsive while
+                        // the test holds back the post-terminal passive notices.
+                        thread::spawn(move || {
+                            let result = (|| -> io::Result<()> {
+                                if let Some(gate) = gate.as_ref() {
+                                    let deadline =
+                                        std::time::Instant::now() + Duration::from_secs(5);
+                                    while !gate.is_file() {
+                                        if std::time::Instant::now() >= deadline {
+                                            return Err(io::Error::new(
+                                                io::ErrorKind::TimedOut,
+                                                "post-completion notification gate timed out",
+                                            ));
+                                        }
+                                        thread::sleep(Duration::from_millis(1));
+                                    }
                                 }
-                                thread::sleep(Duration::from_millis(1));
+                                for notification in [
+                                    json!({
+                                        "method": "deprecationNotice",
+                                        "params": {"summary": "A provider setting is deprecated", "details": null}
+                                    }),
+                                    json!({
+                                        "method": "remoteControl/status/changed",
+                                        "params": {"status": "disabled", "environmentId": null}
+                                    }),
+                                    json!({
+                                        "method": "mcpServer/startupStatus/updated",
+                                        "params": {"name": "codex_apps", "status": "ready", "error": null}
+                                    }),
+                                    json!({
+                                        "method": "account/rateLimits/updated",
+                                        "params": {"rateLimits": {}}
+                                    }),
+                                    json!({
+                                        "method": "rawResponseItem/completed",
+                                        "params": {"threadId": thread_id, "turnId": tail_turn_id, "item": {"id": "raw-tail", "type": "reasoning"}}
+                                    }),
+                                    json!({
+                                        "method": "rawResponse/completed",
+                                        "params": {"threadId": thread_id, "turnId": tail_turn_id, "response": {"id": "response-tail"}}
+                                    }),
+                                    json!({
+                                        "method": "thread/goal/updated",
+                                        "params": {"threadId": thread_id, "goal": "finish the turn"}
+                                    }),
+                                    json!({
+                                        "method": "thread/goal/cleared",
+                                        "params": {"threadId": thread_id}
+                                    }),
+                                ] {
+                                    send(notification)?;
+                                }
+                                if let Some(gate) = gate.as_ref() {
+                                    fs::write(gate.with_extension("emitted"), b"emitted")?;
+                                }
+                                Ok(())
+                            })();
+                            if let Err(error) = result {
+                                eprintln!("post-completion passive tail failed: {error}");
                             }
-                        }
-                        for notification in [
-                            json!({
-                                "method": "deprecationNotice",
-                                "params": {"summary": "A provider setting is deprecated", "details": null}
-                            }),
-                            json!({
-                                "method": "remoteControl/status/changed",
-                                "params": {"status": "disabled", "environmentId": null}
-                            }),
-                            json!({
-                                "method": "mcpServer/startupStatus/updated",
-                                "params": {"name": "codex_apps", "status": "ready", "error": null}
-                            }),
-                            json!({
-                                "method": "account/rateLimits/updated",
-                                "params": {"rateLimits": {}}
-                            }),
-                            json!({
-                                "method": "rawResponseItem/completed",
-                                "params": {"threadId": state.thread_id, "turnId": provider_turn_id, "item": {"id": "raw-tail", "type": "reasoning"}}
-                            }),
-                            json!({
-                                "method": "rawResponse/completed",
-                                "params": {"threadId": state.thread_id, "turnId": provider_turn_id, "response": {"id": "response-tail"}}
-                            }),
-                            json!({
-                                "method": "thread/goal/updated",
-                                "params": {"threadId": state.thread_id, "goal": "finish the turn"}
-                            }),
-                            json!({
-                                "method": "thread/goal/cleared",
-                                "params": {"threadId": state.thread_id}
-                            }),
-                        ] {
-                            send(notification)?;
-                        }
-                        if let Some(gate) = post_completion_notification_gate.as_ref() {
-                            fs::write(gate.with_extension("emitted"), b"emitted")?;
-                        }
+                        });
                     }
                     if emit_post_completion_foreign_turn {
                         let gate = post_completion_notification_gate.clone();
diff --git a/packages/paperclip-runner/src/drivers/acpx/codex-runtime-adapter.test.ts b/packages/paperclip-runner/src/drivers/acpx/codex-runtime-adapter.test.ts
index 45ad16975f..9ebcda1bd6 100644
--- a/packages/paperclip-runner/src/drivers/acpx/codex-runtime-adapter.test.ts
+++ b/packages/paperclip-runner/src/drivers/acpx/codex-runtime-adapter.test.ts
@@ -101,7 +101,10 @@ describe("Codex ACPX runtime adapter", () => {
     });
   });
 
-  it.each([["claude" as const, "claude-sonnet-5", "claude-sonnet-5"]])(
+  it.each([
+    ["claude" as const, "claude-sonnet-5", "claude-sonnet-5"],
+    ["claude" as const, "custom-claude-model", "custom-claude-model"],
+  ])(
     "opens the qualified %s session through the verified lease",
     async (agent, model, providerModel) => {
       const runtime = fakeRuntime();
@@ -109,7 +112,7 @@ describe("Codex ACPX runtime adapter", () => {
       const options = openOptions(command);
       let runtimeOptions: AcpRuntimeOptions | undefined;
       options.profile = resolveQualifiedAcpxProfile(agent, model);
-      options.launchEnvironment = { PATH: "/verified/bin" };
+      options.launchEnvironment = { PATH: "/verified/bin", ANTHROPIC_CUSTOM_MODEL_OPTION: "stale-model" };
 
       await openCodexAcpxRuntime(options, {
         createRegistry: ({ overrides }) => {
@@ -128,6 +131,7 @@ describe("Codex ACPX runtime adapter", () => {
       expect(runtimeOptions?.spawnEnvironment?.()).toEqual({
         PATH: "/verified/bin",
         PAPERCLIP_ACPX_ISOLATED_CONTEXT: "1",
+        ANTHROPIC_CUSTOM_MODEL_OPTION: providerModel,
       });
       expect(runtime.ensureSession).toHaveBeenCalledWith(
         expect.objectContaining({
diff --git a/packages/paperclip-runner/src/drivers/acpx/codex-runtime-adapter.ts b/packages/paperclip-runner/src/drivers/acpx/codex-runtime-adapter.ts
index b92419eec6..a5c1d2d456 100644
--- a/packages/paperclip-runner/src/drivers/acpx/codex-runtime-adapter.ts
+++ b/packages/paperclip-runner/src/drivers/acpx/codex-runtime-adapter.ts
@@ -317,7 +317,14 @@ export async function openQualifiedAcpxRuntime(
     spawnEnvironment: () => ({
       ...definedEnvironment(options.launchEnvironment),
       ...(options.profile.agent === "claude"
-        ? { PAPERCLIP_ACPX_ISOLATED_CONTEXT: "1" }
+        ? {
+            PAPERCLIP_ACPX_ISOLATED_CONTEXT: "1",
+            // Claude ACP otherwise maps concrete IDs back to rolling picker
+            // aliases (e.g. claude-sonnet-5 -> sonnet). Advertise the exact
+            // host-requested ID so model verification stays exact on resume
+            // and before the first billable prompt.
+            ANTHROPIC_CUSTOM_MODEL_OPTION: options.profile.reportedModelId,
+          }
         : {}),
     }),
     spawnCwd: options.cwd,
diff --git a/server/src/__tests__/redaction.test.ts b/server/src/__tests__/redaction.test.ts
index a4c903ec77..1d721a2713 100644
--- a/server/src/__tests__/redaction.test.ts
+++ b/server/src/__tests__/redaction.test.ts
@@ -2,6 +2,7 @@ import { readFileSync } from "node:fs";
 import { describe, expect, it } from "vitest";
 import {
   PRP_V1_EVENT_TYPES,
+  PRP_V2_EVENT_TYPES,
   REDACTED_EVENT_VALUE,
   redactAgentAdapterConfig,
   redactEventPayload,
@@ -23,6 +24,36 @@ describe("redaction", () => {
     expect([...PRP_V1_EVENT_TYPES]).toEqual(schema.properties.eventType.enum);
   });
 
+  it("keeps the discriminator allowlist in exact PRP v2 schema parity", () => {
+    const schema = JSON.parse(readFileSync(new URL(
+      "../../../packages/paperclip-runner/protocol/schemas/event-v2.schema.json",
+      import.meta.url,
+    ), "utf8")) as { properties: { eventType: { enum: string[] } } };
+    expect([...PRP_V2_EVENT_TYPES].sort()).toEqual(schema.properties.eventType.enum.sort());
+  });
+
+  it("preserves v2 goal envelopes while redacting secrets and mismatched versions", () => {
+    for (const eventType of PRP_V2_EVENT_TYPES) {
+      const envelope = {
+        schema: "paperclip.prp.event.v2", schemaVersion: 2, eventType,
+        payload: { apiKey: "secret", opaque: "aaa.bbb.ccc" },
+      };
+      expect(sanitizeRecord(envelope)).toEqual({
+        ...envelope,
+        payload: { apiKey: REDACTED_EVENT_VALUE, opaque: REDACTED_EVENT_VALUE },
+      });
+    }
+    for (const envelope of [
+      { schema: "paperclip.prp.event.v1", schemaVersion: 1, eventType: "session.goal.snapshot" },
+      { schema: "paperclip.prp.event.v2", schemaVersion: 1, eventType: "session.goal.snapshot" },
+      { schema: "paperclip.prp.event.v1", schemaVersion: 2, eventType: "session.goal.snapshot" },
+      { schema: "paperclip.prp.event.v2", schemaVersion: 2, eventType: "aaa.bbb.ccc" },
+      { schema: "paperclip.prp.event.v3", schemaVersion: 3, eventType: "session.goal.snapshot" },
+    ]) {
+      expect(sanitizeRecord(envelope).eventType).toBe(REDACTED_EVENT_VALUE);
+    }
+  });
+
   it("preserves every discriminator in the cross-language replay stream", () => {
     const fixture = JSON.parse(
       readFileSync(
diff --git a/server/src/redaction.ts b/server/src/redaction.ts
index ebbbff26af..925a405f1e 100644
--- a/server/src/redaction.ts
+++ b/server/src/redaction.ts
@@ -110,6 +110,7 @@ export const PAPERCLIP_PUBLIC_SCHEMA_IDS = new Set([
   "paperclip.prp.command.v1",
   "paperclip.prp.contract_manifest.v1",
   "paperclip.prp.event.v1",
+  "paperclip.prp.event.v2",
   "paperclip.prp.fixture.v1",
   "paperclip.prp.identity.v1",
   "paperclip.prp.semantic_tool.v1",
@@ -194,7 +195,7 @@ export const PAPERCLIP_PUBLIC_SCHEMA_IDS = new Set([
 // Keep this closed catalog aligned with PRP v1's event.schema.json. These
 // values are public protocol discriminators, but their dotted shape overlaps
 // the deliberately broad JWT heuristic. They are exempt only in the
-// discriminator field of a PRP v1 event envelope; the same string anywhere
+// discriminator field of a supported PRP event envelope; the same string anywhere
 // else remains subject to redaction.
 export const PRP_V1_EVENT_TYPES = new Set([
   "runner.connected",
@@ -303,6 +304,17 @@ export const PRP_V1_EVENT_TYPES = new Set([
   "issue.status.decision.superseded",
   "run.terminal",
 ]);
+// V2 removes backpressure and semantic reconciliation, and adds goal events.
+// Exact parity with both protocol schemas is enforced by redaction.test.ts.
+export const PRP_V2_EVENT_TYPES = new Set([
+  ...[...PRP_V1_EVENT_TYPES].filter(
+    (type) => type !== "runner.backpressure" && type !== "semantic_tool.reconciled",
+  ),
+  "session.capabilities.updated",
+  "session.goal.snapshot",
+  "session.goal.updated",
+  "session.goal.cleared",
+]);
 const NATIVE_RUN_SPAN_SCHEMA = "paperclip.run-performance-span.v1";
 const NATIVE_RUN_SPAN_FIELDS = ["span", "parentSpan"] as const;
 const NATIVE_RUN_SPAN_NAMES = new Set([
@@ -843,10 +855,13 @@ function isKnownPrpEventDiscriminator(
 ): value is string {
   return (
     key === "eventType" &&
-    container.schema === "paperclip.prp.event.v1" &&
-    container.schemaVersion === 1 &&
     typeof value === "string" &&
-    PRP_V1_EVENT_TYPES.has(value)
+    ((container.schema === "paperclip.prp.event.v1" &&
+      container.schemaVersion === 1 &&
+      PRP_V1_EVENT_TYPES.has(value)) ||
+      (container.schema === "paperclip.prp.event.v2" &&
+        container.schemaVersion === 2 &&
+        PRP_V2_EVENT_TYPES.has(value)))
   );
 }
 
diff --git a/tests/runner-e2e/failure-classifier.ts b/tests/runner-e2e/failure-classifier.ts
index 0073d906ae..c480b1e9dd 100644
--- a/tests/runner-e2e/failure-classifier.ts
+++ b/tests/runner-e2e/failure-classifier.ts
@@ -3,7 +3,7 @@ import type { FailureClass } from "./types.js";
 const TRANSIENT =
   /(?:\b429\b|\b5\d\d\b|rate.?limit|ECONN(?:RESET|REFUSED)|socket hang up|network (?:error|interruption|timeout)|service unavailable|(?:provider|server|bootstrap|browser|webserver|health|daytona|sandbox|ingress|preview|connection|harness).*(?:temporar|timed? out|timeout|closed|failed|unavailable|interrupt|reset|refused|create|start|connect)|(?:timed? out|timeout).*(?:provider|server|bootstrap|browser|webserver|health|daytona|sandbox|ingress|preview|connection|harness))/i;
 const PERMANENT =
-  /(?:missing (?:credential|fixture secret)|invalid.*(?:credential|api key)|unauthorized|forbidden|qualification|model.*(?:unsupported|incompatible)|artifact.*incompatible|runner_remote_.*(?:incompatible|unavailable)|immutable image digest)/i;
+  /(?:retryable=false|effective_model_mismatch|missing (?:credential|fixture secret)|invalid.*(?:credential|api key)|unauthorized|forbidden|qualification|model.*(?:unsupported|incompatible)|artifact.*incompatible|runner_remote_.*(?:incompatible|unavailable)|immutable image digest)/i;
 const CANDIDATE =
   /(?:matcher|expected.*observed|marker|issue status|run status|runtime mode|wrong output|missing output)/i;
 
diff --git a/tests/runner-e2e/run-observations.ts b/tests/runner-e2e/run-observations.ts
index e0f18d49ce..0f87acc55c 100644
--- a/tests/runner-e2e/run-observations.ts
+++ b/tests/runner-e2e/run-observations.ts
@@ -277,3 +277,13 @@ export function numberedPlanStepCount(body: string | null | undefined) {
     );
   }).length;
 }
+
+/** Validate the persisted protocol version without discarding v1 upgrade history. */
+export function hasConsistentPrpEventVersion(
+  envelope: Record<string, unknown>,
+  protocolSchemaVersion: unknown,
+): boolean {
+  return (envelope.schemaVersion === 1 || envelope.schemaVersion === 2)
+    && envelope.schema === `paperclip.prp.event.v${envelope.schemaVersion}`
+    && protocolSchemaVersion === envelope.schemaVersion;
+}
diff --git a/tests/runner-e2e/runner.spec.ts b/tests/runner-e2e/runner.spec.ts
index c23d36aa5a..9a2f879ea2 100644
--- a/tests/runner-e2e/runner.spec.ts
+++ b/tests/runner-e2e/runner.spec.ts
@@ -12,6 +12,7 @@ import { setupLiveFixtures, type LiveFixtureValues } from "./live-fixtures.js";
 import { evaluateMatcher, type MatcherResult } from "./matchers.js";
 import {
   acceptedPlanSessionResetFailures,
+  hasConsistentPrpEventVersion,
   hasTerminalMalformedPlanConfirmation,
   isControlPlaneGovernedResponseWait,
   isNonExecutingReviewFenceRun,
@@ -471,12 +472,8 @@ function nativeRunEventIntegrityFailures(
     }
     const envelope = record(event.payload?.prpEvent);
     if (Object.keys(envelope).length === 0) continue;
-    if (
-      envelope.schema !== "paperclip.prp.event.v1" ||
-      envelope.schemaVersion !== 1 ||
-      event.protocolSchemaVersion !== 1
-    ) {
-      failures.push(`run ${run.id} exposed a malformed PRP v1 envelope`);
+    if (!hasConsistentPrpEventVersion(envelope, event.protocolSchemaVersion)) {
+      failures.push(`run ${run.id} exposed a malformed PRP envelope`);
     }
     if (envelope.runId !== run.id) {
       failures.push(
diff --git a/tests/runner-e2e/support.test.ts b/tests/runner-e2e/support.test.ts
index d22ba6a568..fed018a617 100644
--- a/tests/runner-e2e/support.test.ts
+++ b/tests/runner-e2e/support.test.ts
@@ -35,6 +35,7 @@ import {
 } from "./ports.js";
 import {
   acceptedPlanSessionResetFailures,
+  hasConsistentPrpEventVersion,
   hasTerminalMalformedPlanConfirmation,
   isControlPlaneGovernedResponseWait,
   isNonExecutingReviewFenceRun,
@@ -737,6 +738,14 @@ describe("runner E2E failure policy", () => {
 });
 
 describe("runner E2E server isolation", () => {
+  it("does not retry a provider rejection explicitly marked nonretryable", () => {
+    const failure = classifyFailure(new Error(
+      "failed to start ACPX provider: ACPX sidecar command session.open was rejected (retryable=false, classification=effective_model_mismatch)",
+    ));
+    expect(failure).toBe("permanent_infrastructure");
+    expect(shouldRetryFailure(failure)).toBe(false);
+  });
+
   it("shares restart control files beneath the isolated temporary root", () => {
     expect(runnerE2EServerControlPaths("/tmp/cell")).toEqual({
       controlDirectory: path.join("/tmp/cell", "control"),
@@ -1159,3 +1168,21 @@ describe("runner E2E macOS shared-memory cleanup", () => {
     ]);
   });
 });
+
+describe("persisted native event versions", () => {
+  it.each([1, 2])("accepts matching PRP v%i events", (version) => {
+    expect(hasConsistentPrpEventVersion({
+      schema: `paperclip.prp.event.v${version}`, schemaVersion: version,
+    }, version)).toBe(true);
+  });
+  it.each([
+    ["paperclip.prp.event.v1", 2, 2],
+    ["paperclip.prp.event.v2", 1, 1],
+    ["paperclip.prp.event.v2", 2, 1],
+    ["paperclip.prp.event.v3", 3, 3],
+    ["***REDACTED***", 2, 2],
+    ["paperclip.prp.event.v2", "2", 2],
+  ])("rejects inconsistent version metadata %s/%s/%s", (schema, version, outer) => {
+    expect(hasConsistentPrpEventVersion({schema, schemaVersion: version}, outer)).toBe(false);
+  });
+});