diff --git a/README.md b/README.md
index f4610345e..344531b6e 100644
--- a/README.md
+++ b/README.md
@@ -193,13 +193,14 @@ Uninstall preserves Hopper, Node.js, evidence, captures, external evidence roots
 
 ### CLI or agent?
 
-| If you want to…                                           | Use                                                            |
-| --------------------------------------------------------- | -------------------------------------------------------------- |
-| Ask an agent to investigate an app and build a feature    | Install the skill, then talk to your agent                     |
-| Inspect or decompile one part of an app from the Terminal | `rea analyze` or `rea decompile`                               |
-| Validate, canonicalize, or compare Evidence v2 bundles    | `rea evidence-import`, `rea evidence-export`, or `rea compare` |
-| Import source as historical reference                     | `rea import-reference-source`                                  |
-| Capture or compare controlled process behavior            | `rea capture-process` or `rea compare-process-captures`        |
+| If you want to…                                                 | Use                                                                       |
+| --------------------------------------------------------------- | ------------------------------------------------------------------------- |
+| Ask an agent to investigate an app and build a feature          | Install the skill, then talk to your agent                                |
+| Inspect or decompile one part of an app from the Terminal       | `rea analyze` or `rea decompile`                                          |
+| Validate, canonicalize, or compare Evidence v2 bundles          | `rea evidence-import`, `rea evidence-export`, or `rea compare`            |
+| Reuse immutable analysis results without relaunching a provider | Pass `--snapshot /approved/path/analysis.json` to a deep-analysis command |
+| Import source as historical reference                           | `rea import-reference-source`                                             |
+| Capture or compare controlled process behavior                  | `rea capture-process` or `rea compare-process-captures`                   |
 
 Filesystem evidence commands and MCP file tools are disabled until the operator approves absolute roots:
 
@@ -219,6 +220,30 @@ rea import-reference-source /absolute/path/to/source
 
 Exports never replace an existing file unless `--overwrite` is explicit. Imports are size/depth bounded, validate every Evidence v2 ID and manifest, and never execute bundle content.
 
+Provider-neutral analysis snapshots persist successful, immutable REA calls and
+their Evidence v2 records. They are exact caches rather than Hopper databases:
+REA reuses an entry only when the binary digest, format, architecture, operation
+parameters, loader arguments, and provider identity match. Custom Hopper loader
+overrides disable snapshots because their provider configuration cannot be
+replayed safely. Cursor-dependent and mutating calls are never cached. Snapshot
+files can contain proprietary analysis results and local
+paths, so REA keeps them local, writes them with owner-only permissions, and
+requires a separate approved root:
+
+```bash
+export REA_ANALYSIS_SNAPSHOT_ROOTS_JSON='["/absolute/path/to/analysis"]'
+rea analyze /absolute/path/to/app --snapshot /absolute/path/to/analysis/app.json
+# The same exact query can now be answered from the snapshot.
+rea analyze /absolute/path/to/app --snapshot /absolute/path/to/analysis/app.json
+```
+
+Exact CLI evidence replays happen before any provider starts. In MCP sessions,
+pass `snapshot_path` to `open_binary` to import a snapshot atomically while
+opening its matching target; MCP providers may still start before a cached call
+is replayed. Pass `snapshot_path` and, when required, `overwrite: true` to
+`close_binary` to save atomically before Hopper resources are released. If the
+save fails, REA deliberately leaves the session open.
+
 ## One prompt, a full investigation
 
 ```text
diff --git a/bridge/hopper_bridge.py b/bridge/hopper_bridge.py
index a22f20637..18548fac1 100644
--- a/bridge/hopper_bridge.py
+++ b/bridge/hopper_bridge.py
@@ -18,6 +18,19 @@ _selected_document = None
 _search_inventory_cache = {}
 MAX_SEARCH_PATTERN_LENGTH = 256
 MAX_SEARCH_VALUE_LENGTH = 4096
+
+
+def _session_document():
+    """Find only the document opened for this authenticated REA session."""
+    target = os.path.realpath(REA_TARGET_PATH)
+    for document in Document.getAllDocuments():
+        paths = (document.getExecutableFilePath(), document.getDatabaseFilePath())
+        for path in paths:
+            if path and os.path.realpath(path) == target:
+                return document
+    return None
+
+
 MAX_REGEX_BACKTRACKING_PATHS = 10000
 MAX_REGEX_CANDIDATE_LENGTH = 4096
 MAX_REGEX_SEARCH_WORK_UNITS = 1000000
@@ -616,7 +629,21 @@ def _dispatch(method, params):
     if method == "health":
         return {"name": "REA Hopper bridge", "version": "1.0.0", "run_id": REA_RUN_ID}
     if method == "shutdown":
-        return {"shutdown": True}
+        document = _session_document()
+        if document is None:
+            return {"shutdown": True, "analysis_stopped": True, "document_closed": True}
+        if document.backgroundProcessActive():
+            document.requestBackgroundProcessStop()
+        if document.backgroundProcessActive():
+            document.waitForBackgroundProcessToEnd()
+        analysis_stopped = not document.backgroundProcessActive()
+        document.closeDocument()
+        document_closed = _session_document() is None
+        return {
+            "shutdown": True,
+            "analysis_stopped": analysis_stopped,
+            "document_closed": document_closed,
+        }
     if method == "list_documents":
         return [document.getDocumentName() for document in Document.getAllDocuments()]
     if method == "current_document":
@@ -726,9 +753,9 @@ def _dispatch(method, params):
         if method == "procedure_pseudo_code":
             return procedure.decompile()
         if method == "procedure_callers":
-            return [_procedure_name(item) for item in procedure.getAllCallerProcedures()]
+            return sorted((_hex(item.getEntryPoint()) for item in procedure.getAllCallerProcedures()), key=lambda value: int(value, 16))
         if method == "procedure_callees":
-            return [_procedure_name(item) for item in procedure.getAllCalleeProcedures()]
+            return sorted((_hex(item.getEntryPoint()) for item in procedure.getAllCalleeProcedures()), key=lambda value: int(value, 16))
         if method == "procedure_info":
             blocks = list(procedure.basicBlockIterator())
             length = sum(max(0, block.getEndingAddress() - block.getStartingAddress()) for block in blocks)
diff --git a/src/application/AnalysisSnapshotCache.ts b/src/application/AnalysisSnapshotCache.ts
new file mode 100644
index 000000000..544937c48
--- /dev/null
+++ b/src/application/AnalysisSnapshotCache.ts
@@ -0,0 +1,212 @@
+import type { BinaryTarget } from "../domain/binaryTarget.js";
+import type { JsonValue } from "../domain/jsonValue.js";
+import type { EvidenceBundle } from "../domain/evidenceBundle.js";
+import {
+  EvidenceIntegrityError,
+  NoBinaryOpenError,
+  type AnalysisError,
+  type EvidenceLimitError,
+} from "../domain/errors.js";
+import { err, ok, type Result } from "../domain/result.js";
+import {
+  analysisQueryId,
+  createAnalysisSnapshotEntry,
+  snapshotMatchesTarget,
+  snapshotTarget,
+  type AnalysisSnapshot,
+  type AnalysisSnapshotEntry,
+  type AnalysisSnapshotTarget,
+} from "../domain/analysisSnapshot.js";
+import type {
+  AnalysisExecution,
+  AnalysisOperation,
+  CapabilityDescriptor,
+  ProviderIdentity,
+} from "./AnalysisProvider.js";
+import { OFFICIAL_TOOL_CONTRACTS } from "../contracts/toolContracts.js";
+
+const STATEFUL_OPERATIONS: ReadonlySet<AnalysisOperation> = new Set([
+  "health",
+  "current_address",
+  "current_procedure",
+  "current_document",
+  "goto_address",
+  "list_documents",
+  "set_current_document",
+]);
+
+const CURSOR_DEFAULT_OPERATIONS: ReadonlySet<AnalysisOperation> = new Set([
+  "address_name",
+  "comment",
+  "inline_comment",
+  "next_address",
+  "prev_address",
+  "xrefs",
+]);
+
+const DOCUMENT_SCOPED_OPERATIONS: ReadonlySet<AnalysisOperation> = new Set(
+  OFFICIAL_TOOL_CONTRACTS.map(({ name }) => name).filter(
+    (name) =>
+      name !== "current_document" &&
+      name !== "list_documents" &&
+      name !== "set_current_document",
+  ),
+);
+
+/** Whether an operation is immutable and independent of provider UI state. */
+export const isSnapshotCacheable = (
+  operation: AnalysisOperation,
+  descriptor: CapabilityDescriptor | undefined,
+  parameters: Readonly<Record<string, JsonValue>>,
+): descriptor is CapabilityDescriptor =>
+  !STATEFUL_OPERATIONS.has(operation) &&
+  (!DOCUMENT_SCOPED_OPERATIONS.has(operation) ||
+    typeof parameters.document === "string") &&
+  (!CURSOR_DEFAULT_OPERATIONS.has(operation) ||
+    typeof parameters.address === "string") &&
+  descriptor?.effects.mutatesArtifact === false &&
+  descriptor.effects.mayWriteFilesystem === false &&
+  descriptor.effects.changesPermissions === false;
+
+/** Bounded in-memory cache for one immutable binary identity. */
+export class AnalysisSnapshotCache {
+  readonly #entries = new Map<string, AnalysisSnapshotEntry>();
+  #target: AnalysisSnapshotTarget | undefined;
+
+  /** Whether staged entries belong to the supplied binary. */
+  matches(target: BinaryTarget): boolean {
+    return (
+      this.#target === undefined || snapshotMatchesTarget(this.#target, target)
+    );
+  }
+
+  /** Replace cache state when the active binary identity changes. */
+  select(target: BinaryTarget): void {
+    if (!this.matches(target)) this.#entries.clear();
+    this.#target = snapshotTarget(target);
+  }
+
+  /** Merge already-validated entries and return the new-entry count. */
+  stage(snapshot: AnalysisSnapshot): number {
+    if (
+      this.#target !== undefined &&
+      (this.#target.sha256 !== snapshot.target.sha256 ||
+        this.#target.format !== snapshot.target.format ||
+        this.#target.architecture !== snapshot.target.architecture)
+    )
+      this.#entries.clear();
+    this.#target = snapshot.target;
+    let imported = 0;
+    for (const entry of snapshot.entries) {
+      if (!this.#entries.has(entry.query_id)) imported += 1;
+      this.#entries.set(entry.query_id, entry);
+    }
+    return imported;
+  }
+
+  /** Build a complete snapshot for an active target. */
+  export(
+    target: BinaryTarget | undefined,
+    evidenceBundle: EvidenceBundle,
+  ): Result<AnalysisSnapshot, NoBinaryOpenError> {
+    if (target === undefined) return err(new NoBinaryOpenError());
+    return ok({
+      snapshot_version: 1,
+      target: snapshotTarget(target),
+      entries: this.entries(),
+      evidence_bundle: evidenceBundle,
+    });
+  }
+
+  /** Validate target identity, merge evidence atomically, then stage entries. */
+  import(
+    snapshot: AnalysisSnapshot,
+    active: BinaryTarget | undefined,
+    mergeEvidence: (
+      bundle: EvidenceBundle,
+    ) => Result<number, EvidenceIntegrityError | EvidenceLimitError>,
+  ): Result<number, AnalysisError> {
+    if (active !== undefined && !snapshotMatchesTarget(snapshot.target, active))
+      return err(
+        new EvidenceIntegrityError(
+          "Analysis snapshot target does not match the active binary",
+        ),
+      );
+    const importedEvidence = mergeEvidence(snapshot.evidence_bundle);
+    return importedEvidence.ok ? ok(this.stage(snapshot)) : importedEvidence;
+  }
+
+  /** Return canonical entries for persistence. */
+  entries(): AnalysisSnapshotEntry[] {
+    return [...this.#entries.values()].sort((left, right) =>
+      left.query_id.localeCompare(right.query_id),
+    );
+  }
+
+  /** Replay an exact provider-specific query, marking its cached provenance. */
+  lookup(
+    target: BinaryTarget,
+    operation: AnalysisOperation,
+    parameters: Readonly<Record<string, JsonValue>>,
+    provider: ProviderIdentity,
+  ): AnalysisExecution | undefined {
+    const queryId = analysisQueryId(
+      snapshotTarget(target),
+      operation,
+      parameters,
+      provider,
+    );
+    const cached = this.#entries.get(queryId);
+    if (cached === undefined) return undefined;
+    const subject = cached.execution.subject;
+    return {
+      result: cached.execution.result,
+      rawResult: cached.execution.raw_result,
+      provider: cached.execution.provider,
+      limitations: [
+        ...cached.execution.limitations,
+        "Loaded from a local REA analysis snapshot; this call did not re-run the provider.",
+      ],
+      locations: cached.execution.locations,
+      subject:
+        subject === null
+          ? null
+          : subject.architecture === null
+            ? {
+                path: subject.path,
+                sha256: subject.sha256,
+                format: subject.format,
+              }
+            : {
+                path: subject.path,
+                sha256: subject.sha256,
+                format: subject.format,
+                architecture: subject.architecture,
+              },
+    };
+  }
+
+  /** Record one successful immutable call unless the cache is full. */
+  record(
+    target: BinaryTarget,
+    operation: AnalysisOperation,
+    parameters: Readonly<Record<string, JsonValue>>,
+    execution: AnalysisExecution,
+  ): void {
+    if (this.#entries.size >= 10_000) return;
+    this.select(target);
+    const entry = createAnalysisSnapshotEntry(
+      snapshotTarget(target),
+      operation,
+      parameters,
+      execution,
+    );
+    this.#entries.set(entry.query_id, entry);
+  }
+
+  /** Forget all target-bound entries. */
+  clear(): void {
+    this.#entries.clear();
+    this.#target = undefined;
+  }
+}
diff --git a/src/application/AnalysisSnapshotFiles.ts b/src/application/AnalysisSnapshotFiles.ts
new file mode 100644
index 000000000..94cb6464c
--- /dev/null
+++ b/src/application/AnalysisSnapshotFiles.ts
@@ -0,0 +1,51 @@
+import {
+  parseAnalysisSnapshot,
+  serializeAnalysisSnapshot,
+  type AnalysisSnapshot,
+} from "../domain/analysisSnapshot.js";
+import type { EvidenceFilePolicy } from "../domain/evidenceBundle.js";
+import { EvidenceFileError, EvidenceIntegrityError } from "../domain/errors.js";
+import { err, ok, type Result } from "../domain/result.js";
+import { readBoundedJson, writeBoundedText } from "./BoundedJsonFiles.js";
+
+type SnapshotFailure = EvidenceFileError | EvidenceIntegrityError;
+
+/** Read and validate a bounded analysis snapshot inside an approved root. */
+export const readAnalysisSnapshot = async (
+  path: string,
+  policy: EvidenceFilePolicy,
+): Promise<Result<AnalysisSnapshot, SnapshotFailure>> => {
+  const loaded = await readBoundedJson(path, policy);
+  if (!loaded.ok) return loaded;
+  try {
+    return ok(parseAnalysisSnapshot(loaded.value));
+  } catch (cause: unknown) {
+    return err(
+      new EvidenceIntegrityError("Analysis snapshot validation failed", {
+        cause,
+      }),
+    );
+  }
+};
+
+/** Atomically write a deterministic analysis snapshot inside an approved root. */
+export const writeAnalysisSnapshot = async (
+  snapshot: AnalysisSnapshot,
+  path: string,
+  overwrite: boolean,
+  policy: EvidenceFilePolicy,
+): Promise<
+  Result<{ readonly path: string; readonly bytes: number }, SnapshotFailure>
+> => {
+  let encoded: string;
+  try {
+    encoded = serializeAnalysisSnapshot(snapshot);
+  } catch (cause: unknown) {
+    return err(
+      new EvidenceIntegrityError("Analysis snapshot validation failed", {
+        cause,
+      }),
+    );
+  }
+  return writeBoundedText(encoded, path, overwrite, policy);
+};
diff --git a/src/application/BinarySession.ts b/src/application/BinarySession.ts
index ea7fb4a42..af842a7d5 100644
--- a/src/application/BinarySession.ts
+++ b/src/application/BinarySession.ts
@@ -13,6 +13,7 @@ import type { JsonValue } from "../domain/jsonValue.js";
 import type { Evidence } from "../domain/evidence.js";
 import { createEvidence } from "../domain/evidence.js";
 import type { EvidenceBundle } from "../domain/evidenceBundle.js";
+import { evidenceBundleForTarget } from "../domain/evidenceBundle.js";
 import type {
   AnalysisClient,
   AnalysisExecution,
@@ -33,63 +34,23 @@ import { UnknownRegistryError } from "../domain/errors.js";
 import type { AnalysisOperation } from "./AnalysisProvider.js";
 import { enhancedToolNameSchema } from "../contracts/enhancedInputs.js";
 import { OFFICIAL_TOOL_CONTRACTS } from "../contracts/toolContracts.js";
-
-const REGISTRY_PROVIDER: ProviderIdentity = {
-  id: "rea-unknown-registry",
-  name: "REA residual unknown registry",
-  version: "1",
-};
+import type { AnalysisSnapshot } from "../domain/analysisSnapshot.js";
+import { snapshotMatchesTarget } from "../domain/analysisSnapshot.js";
+import {
+  AnalysisSnapshotCache,
+  isSnapshotCacheable,
+} from "./AnalysisSnapshotCache.js";
+import {
+  UNKNOWN_REGISTRY_PROVIDER,
+  unknownEvidenceLinks,
+  unknownMutationEvidence,
+} from "./UnknownEvidence.js";
+import type { BinarySessionPort } from "./BinarySessionPort.js";
+export type { BinarySessionPort } from "./BinarySessionPort.js";
 const OFFICIAL_OPERATIONS: ReadonlySet<string> = new Set(
   OFFICIAL_TOOL_CONTRACTS.map(({ name }) => name),
 );
 
-/** Target lifecycle used by CLI and MCP without exposing a concrete provider. */
-export interface BinarySessionPort extends AnalysisOperationPort {
-  open(
-    path: string,
-    options?: {
-      readonly signal?: AbortSignal;
-      readonly targetKind?: BinaryTarget["kind"];
-    },
-  ): Promise<Result<BinaryTarget, AnalysisError>>;
-  close(): Promise<Result<null, AnalysisError>>;
-  status(): JsonValue;
-  activeTarget(): BinaryTarget | undefined;
-  recordEvidence(
-    evidence: Evidence,
-  ): Result<"added" | "duplicate", EvidenceIntegrityError | EvidenceLimitError>;
-  hasEvidence(evidenceId: string): boolean;
-  evidenceById(evidenceId: string): Evidence | undefined;
-  exportEvidenceBundle(): EvidenceBundle;
-  importEvidenceBundle(
-    bundle: unknown,
-  ): Result<number, EvidenceIntegrityError | EvidenceLimitError>;
-  recordUnknown(
-    input: RecordUnknownInput,
-  ): Result<ResidualUnknown, AnalysisError>;
-  recordEvidenceWithUnknown(
-    evidence: Evidence,
-    input: RecordUnknownInput,
-  ): Result<ResidualUnknown | null, AnalysisError>;
-  updateUnknown(
-    input: UpdateUnknownInput,
-  ): Result<ResidualUnknown, AnalysisError>;
-  listUnknowns(filters?: {
-    readonly status?: UnknownStatus;
-    readonly severity?: ResidualUnknown["severity"];
-    readonly domain?: string;
-  }): ResidualUnknown[];
-  verifyUnknownResolution(unknownId: string): Result<
-    {
-      readonly valid: boolean;
-      readonly truthVerified: boolean;
-      readonly unknown: ResidualUnknown;
-    },
-    UnknownRegistryError
-  >;
-  providerIdentity(operation?: AnalysisOperation): ProviderIdentity;
-}
-
 /**
  * Owns the single active target shared by CLI and MCP adapters.
  *
@@ -111,8 +72,15 @@ export class BinarySession implements BinarySessionPort {
     maxRecords: 10_000,
     maxBytes: 64 * 1024 * 1024,
   });
+  readonly #snapshot = new AnalysisSnapshotCache();
+  readonly #snapshotsEnabled: boolean;
+  #snapshotInvalidated = false;
 
-  constructor(readonly provider: AnalysisProvider | AnalysisClientFactory) {
+  constructor(
+    readonly provider: AnalysisProvider | AnalysisClientFactory,
+    options: { readonly snapshotsEnabled?: boolean } = {},
+  ) {
+    this.#snapshotsEnabled = options.snapshotsEnabled ?? true;
     this.#createClient =
       typeof provider === "function"
         ? provider
@@ -185,6 +153,44 @@ export class BinarySession implements BinarySessionPort {
     return this.#evidence.import(bundle);
   }
 
+  /** Export immutable cached calls and session evidence for the active target. */
+  exportAnalysisSnapshot(): Result<AnalysisSnapshot, AnalysisError> {
+    if (!this.#snapshotsEnabled)
+      return err(
+        new EvidenceIntegrityError(
+          "Analysis snapshots are unavailable with custom Hopper loader arguments",
+        ),
+      );
+    if (this.#snapshotInvalidated)
+      return err(
+        new EvidenceIntegrityError(
+          "Analysis snapshots are unavailable after analysis metadata mutations",
+        ),
+      );
+    const target = this.#active?.target;
+    return this.#snapshot.export(
+      target,
+      target === undefined
+        ? this.#evidence.export()
+        : evidenceBundleForTarget(this.#evidence.export(), target.sha256),
+    );
+  }
+
+  /** Stage validated cached calls for an identical binary and merge its evidence. */
+  importAnalysisSnapshot(
+    snapshot: AnalysisSnapshot,
+  ): Result<number, AnalysisError> {
+    if (!this.#snapshotsEnabled)
+      return err(
+        new EvidenceIntegrityError(
+          "Analysis snapshots are unavailable with custom Hopper loader arguments",
+        ),
+      );
+    return this.#snapshot.import(snapshot, this.#active?.target, (bundle) =>
+      this.#evidence.import(bundle),
+    );
+  }
+
   /** Create an approved residual unknown and immutable mutation evidence. */
   recordUnknown(
     input: RecordUnknownInput,
@@ -209,21 +215,25 @@ export class BinarySession implements BinarySessionPort {
   updateUnknown(
     input: UpdateUnknownInput,
   ): Result<ResidualUnknown, AnalysisError> {
-    const evidence = createEvidence(this.#active?.target, REGISTRY_PROVIDER, {
-      predicateType: "rea.residual-unknown-mutation/v1",
-      operation: "update_unknown",
-      parameters: {
-        unknown_id: input.unknown_id,
-        expected_revision: input.expected_revision,
+    const evidence = createEvidence(
+      this.#active?.target,
+      UNKNOWN_REGISTRY_PROVIDER,
+      {
+        predicateType: "rea.residual-unknown-mutation/v1",
+        operation: "update_unknown",
+        parameters: {
+          unknown_id: input.unknown_id,
+          expected_revision: input.expected_revision,
+        },
+        result: { action: "update", status: input.status },
+        confidence: "derived",
+        authority: "analyst-inference",
+        evidenceLinks: unknownEvidenceLinks(input),
+        limitations: [
+          "Registry mutation evidence records analyst intent, not proof of the answer.",
+        ],
       },
-      result: { action: "update", status: input.status },
-      confidence: "derived",
-      authority: "analyst-inference",
-      evidenceLinks: unknownEvidenceLinks(input),
-      limitations: [
-        "Registry mutation evidence records analyst intent, not proof of the answer.",
-      ],
-    });
+    );
     return this.#evidence.updateUnknown(input, evidence);
   }
 
@@ -259,6 +269,7 @@ export class BinarySession implements BinarySessionPort {
     options: {
       readonly signal?: AbortSignal;
       readonly targetKind?: BinaryTarget["kind"];
+      readonly snapshot?: AnalysisSnapshot;
     } = {},
   ): Promise<Result<BinaryTarget, AnalysisError>> {
     return this.#serialize(async () => {
@@ -271,10 +282,30 @@ export class BinarySession implements BinarySessionPort {
         options.targetKind,
       );
       if (!parsed.ok) return parsed;
+      if (
+        options.snapshot !== undefined &&
+        !snapshotMatchesTarget(options.snapshot.target, parsed.value)
+      )
+        return err(
+          new EvidenceIntegrityError(
+            "Analysis snapshot target does not match the requested binary",
+          ),
+        );
+      if (this.#active === undefined && !this.#snapshot.matches(parsed.value))
+        return err(
+          new EvidenceIntegrityError(
+            "Analysis snapshot target does not match the requested binary",
+          ),
+        );
       if (isAborted(options.signal))
         return err(new AnalysisCancelledError("open_binary"));
-      if (this.#active?.target.path === parsed.value.path)
+      if (this.#active?.target.path === parsed.value.path) {
+        if (options.snapshot !== undefined) {
+          const imported = this.importAnalysisSnapshot(options.snapshot);
+          if (!imported.ok) return imported;
+        }
         return ok(parsed.value);
+      }
       await this.#drainCalls();
       const previous = this.#active;
       this.#active = undefined;
@@ -292,6 +323,17 @@ export class BinarySession implements BinarySessionPort {
         return err(new AnalysisCancelledError("open_binary"));
       }
       this.#active = { target: parsed.value, client };
+      this.#snapshot.select(parsed.value);
+      if (options.snapshot !== undefined) {
+        const imported = this.importAnalysisSnapshot(options.snapshot);
+        if (!imported.ok) {
+          this.#active = undefined;
+          await client.close();
+          await this.#restore(previous);
+          return imported;
+        }
+      }
+      this.#snapshotInvalidated = false;
       return ok(parsed.value);
     });
   }
@@ -304,6 +346,8 @@ export class BinarySession implements BinarySessionPort {
       await this.#drainCalls();
       await previous?.client.close();
       this.#evidence.clear();
+      this.#snapshot.clear();
+      this.#snapshotInvalidated = false;
       return ok(null);
     });
   }
@@ -398,10 +442,27 @@ export class BinarySession implements BinarySessionPort {
       );
     const active = this.#active;
     if (active === undefined) return err(new NoBinaryOpenError());
+    const cacheable = isSnapshotCacheable(name, capability, arguments_);
+    const cached = cacheable
+      ? this.#snapshot.lookup(
+          active.target,
+          name,
+          arguments_,
+          capability.provider,
+        )
+      : undefined;
+    if (cached !== undefined) return ok(cached);
     const call = active.client.execute(name, arguments_, options);
     this.#calls.add(call);
     try {
-      return await call;
+      const result = await call;
+      if (result.ok && cacheable)
+        this.#snapshot.record(active.target, name, arguments_, result.value);
+      else if (result.ok && capability?.effects.mutatesArtifact === true) {
+        this.#snapshot.clear();
+        this.#snapshotInvalidated = true;
+      }
+      return result;
     } finally {
       this.#calls.delete(call);
     }
@@ -469,41 +530,5 @@ export class BinarySession implements BinarySessionPort {
   }
 }
 
-const unknownMutationEvidence = (
-  target: BinaryTarget | undefined,
-  input: RecordUnknownInput,
-): Evidence =>
-  createEvidence(target, REGISTRY_PROVIDER, {
-    predicateType: "rea.residual-unknown-mutation/v1",
-    operation: "record_unknown",
-    parameters: {
-      domain: input.domain,
-      severity: input.severity,
-    },
-    result: {
-      action: "record",
-      question: input.question,
-      required_authority: input.required_authority,
-      required_confidence: input.required_confidence,
-    },
-    confidence: "derived",
-    authority: "analyst-inference",
-    evidenceLinks: unknownEvidenceLinks(input),
-    limitations: [
-      "Registry mutation evidence records analyst intent, not proof of the answer.",
-    ],
-  });
-
-const unknownEvidenceLinks = (
-  input: RecordUnknownInput | UpdateUnknownInput,
-): string[] =>
-  [
-    ...input.supporting_evidence_ids,
-    ...input.contradicting_evidence_ids,
-    ...("resolution" in input && input.resolution !== null
-      ? input.resolution.evidence_ids
-      : []),
-  ].filter((id, index, values) => values.indexOf(id) === index);
-
 const isAborted = (signal: AbortSignal | undefined): boolean =>
   signal?.aborted === true;
diff --git a/src/application/BinarySessionPort.ts b/src/application/BinarySessionPort.ts
new file mode 100644
index 000000000..659eabb85
--- /dev/null
+++ b/src/application/BinarySessionPort.ts
@@ -0,0 +1,75 @@
+import type { BinaryTarget } from "../domain/binaryTarget.js";
+import type { JsonValue } from "../domain/jsonValue.js";
+import type { Evidence } from "../domain/evidence.js";
+import type { EvidenceBundle } from "../domain/evidenceBundle.js";
+import type { AnalysisSnapshot } from "../domain/analysisSnapshot.js";
+import type {
+  AnalysisError,
+  EvidenceIntegrityError,
+  EvidenceLimitError,
+  UnknownRegistryError,
+} from "../domain/errors.js";
+import type { Result } from "../domain/result.js";
+import type {
+  RecordUnknownInput,
+  ResidualUnknown,
+  UnknownStatus,
+  UpdateUnknownInput,
+} from "../domain/residualUnknown.js";
+import type {
+  AnalysisOperation,
+  AnalysisOperationPort,
+  ProviderIdentity,
+} from "./AnalysisProvider.js";
+
+/** Target lifecycle used by CLI and MCP without exposing a concrete provider. */
+export interface BinarySessionPort extends AnalysisOperationPort {
+  open(
+    path: string,
+    options?: {
+      readonly signal?: AbortSignal;
+      readonly targetKind?: BinaryTarget["kind"];
+      readonly snapshot?: AnalysisSnapshot;
+    },
+  ): Promise<Result<BinaryTarget, AnalysisError>>;
+  close(): Promise<Result<null, AnalysisError>>;
+  status(): JsonValue;
+  activeTarget(): BinaryTarget | undefined;
+  recordEvidence(
+    evidence: Evidence,
+  ): Result<"added" | "duplicate", EvidenceIntegrityError | EvidenceLimitError>;
+  hasEvidence(evidenceId: string): boolean;
+  evidenceById(evidenceId: string): Evidence | undefined;
+  exportEvidenceBundle(): EvidenceBundle;
+  importEvidenceBundle(
+    bundle: unknown,
+  ): Result<number, EvidenceIntegrityError | EvidenceLimitError>;
+  exportAnalysisSnapshot(): Result<AnalysisSnapshot, AnalysisError>;
+  importAnalysisSnapshot(
+    snapshot: AnalysisSnapshot,
+  ): Result<number, AnalysisError>;
+  recordUnknown(
+    input: RecordUnknownInput,
+  ): Result<ResidualUnknown, AnalysisError>;
+  recordEvidenceWithUnknown(
+    evidence: Evidence,
+    input: RecordUnknownInput,
+  ): Result<ResidualUnknown | null, AnalysisError>;
+  updateUnknown(
+    input: UpdateUnknownInput,
+  ): Result<ResidualUnknown, AnalysisError>;
+  listUnknowns(filters?: {
+    readonly status?: UnknownStatus;
+    readonly severity?: ResidualUnknown["severity"];
+    readonly domain?: string;
+  }): ResidualUnknown[];
+  verifyUnknownResolution(unknownId: string): Result<
+    {
+      readonly valid: boolean;
+      readonly truthVerified: boolean;
+      readonly unknown: ResidualUnknown;
+    },
+    UnknownRegistryError
+  >;
+  providerIdentity(operation?: AnalysisOperation): ProviderIdentity;
+}
diff --git a/src/application/BoundedJsonFiles.ts b/src/application/BoundedJsonFiles.ts
new file mode 100644
index 000000000..c62c708d9
--- /dev/null
+++ b/src/application/BoundedJsonFiles.ts
@@ -0,0 +1,130 @@
+import { lstat, readFile, realpath } from "node:fs/promises";
+import { basename, dirname, isAbsolute, relative, resolve } from "node:path";
+
+import writeFileAtomic from "write-file-atomic";
+
+import type { EvidenceFilePolicy } from "../domain/evidenceBundle.js";
+import { EvidenceFileError } from "../domain/errors.js";
+import { err, ok, type Result } from "../domain/result.js";
+
+/** Read bounded JSON data from a regular file beneath an approved root. */
+export const readBoundedJson = async (
+  path: string,
+  policy: EvidenceFilePolicy,
+): Promise<Result<unknown, EvidenceFileError>> => {
+  if (policy.roots.length === 0)
+    return err(new EvidenceFileError("read", "disabled"));
+  try {
+    const canonicalPath = await realpath(resolve(path));
+    if (!(await isApproved(canonicalPath, policy.roots)))
+      return err(new EvidenceFileError("read", "outside-root"));
+    const stats = await lstat(canonicalPath);
+    if (!stats.isFile()) return err(new EvidenceFileError("read", "not-file"));
+    if (stats.size > policy.maxBytes)
+      return err(new EvidenceFileError("read", "too-large"));
+    const encoded = await readFile(canonicalPath);
+    if (encoded.byteLength > policy.maxBytes)
+      return err(new EvidenceFileError("read", "too-large"));
+    let decoded: unknown;
+    try {
+      decoded = JSON.parse(encoded.toString("utf8"));
+    } catch (cause: unknown) {
+      return err(new EvidenceFileError("read", "invalid-json", { cause }));
+    }
+    const limits = validateJsonLimits(decoded, policy);
+    return limits.ok ? ok(decoded) : limits;
+  } catch (cause: unknown) {
+    return err(new EvidenceFileError("read", "io", { cause }));
+  }
+};
+
+/** Atomically write bounded text to a regular file beneath an approved root. */
+export const writeBoundedText = async (
+  encoded: string,
+  path: string,
+  overwrite: boolean,
+  policy: EvidenceFilePolicy,
+): Promise<
+  Result<{ readonly path: string; readonly bytes: number }, EvidenceFileError>
+> => {
+  if (policy.roots.length === 0)
+    return err(new EvidenceFileError("write", "disabled"));
+  const bytes = Buffer.byteLength(encoded, "utf8");
+  if (bytes > policy.maxBytes)
+    return err(new EvidenceFileError("write", "too-large"));
+  try {
+    const requestedPath = resolve(path);
+    const canonicalParent = await realpath(dirname(requestedPath));
+    const destination = resolve(canonicalParent, basename(requestedPath));
+    if (!(await isApproved(destination, policy.roots)))
+      return err(new EvidenceFileError("write", "outside-root"));
+    const existing = await lstat(destination).catch((cause: unknown) => {
+      if (isFileNotFound(cause)) return undefined;
+      throw cause;
+    });
+    if (existing !== undefined) {
+      if (!overwrite) return err(new EvidenceFileError("write", "exists"));
+      if (!existing.isFile() || existing.isSymbolicLink())
+        return err(new EvidenceFileError("write", "not-file"));
+    }
+    await writeFileAtomic(destination, encoded, {
+      encoding: "utf8",
+      mode: 0o600,
+      fsync: true,
+    });
+    return ok({ path: requestedPath, bytes });
+  } catch (cause: unknown) {
+    return err(new EvidenceFileError("write", "io", { cause }));
+  }
+};
+
+const isApproved = async (
+  candidate: string,
+  roots: readonly string[],
+): Promise<boolean> => {
+  for (const configuredRoot of roots) {
+    const root = await realpath(resolve(configuredRoot));
+    const relation = relative(root, candidate);
+    if (
+      relation === "" ||
+      (!relation.startsWith("..") && !isAbsolute(relation))
+    )
+      return true;
+  }
+  return false;
+};
+
+const validateJsonLimits = (
+  root: unknown,
+  policy: EvidenceFilePolicy,
+): Result<null, EvidenceFileError> => {
+  const pending: Array<{ readonly value: unknown; readonly depth: number }> = [
+    { value: root, depth: 0 },
+  ];
+  let nodes = 0;
+  while (pending.length > 0) {
+    const current = pending.pop();
+    if (current === undefined) break;
+    nodes += 1;
+    if (nodes > policy.maxNodes || current.depth > policy.maxDepth)
+      return err(new EvidenceFileError("read", "too-large"));
+    if (
+      typeof current.value === "string" &&
+      current.value.length > policy.maxStringLength
+    )
+      return err(new EvidenceFileError("read", "too-large"));
+    if (typeof current.value !== "object" || current.value === null) continue;
+    for (const [key, value] of Object.entries(current.value)) {
+      if (key.length > policy.maxStringLength)
+        return err(new EvidenceFileError("read", "too-large"));
+      pending.push({ value, depth: current.depth + 1 });
+    }
+  }
+  return ok(null);
+};
+
+const isFileNotFound = (cause: unknown): boolean =>
+  typeof cause === "object" &&
+  cause !== null &&
+  "code" in cause &&
+  cause.code === "ENOENT";
diff --git a/src/application/DirectAnalysis.ts b/src/application/DirectAnalysis.ts
index 6c92b39dd..b40843f95 100644
--- a/src/application/DirectAnalysis.ts
+++ b/src/application/DirectAnalysis.ts
@@ -4,9 +4,26 @@ import { EnhancedTools } from "./EnhancedTools.js";
 import { createBinarySession } from "./runtime.js";
 import { silentLogger, type Logger } from "../logger.js";
 import { createEvidence } from "../domain/evidence.js";
+import type { Evidence } from "../domain/evidence.js";
 import type { NativeToolName } from "../contracts/nativeToolContracts.js";
 import type { ArtifactToolName } from "../contracts/artifactToolContracts.js";
-import { projectAnalysisError, type AnalysisError } from "../domain/errors.js";
+import {
+  EvidenceIntegrityError,
+  projectAnalysisError,
+  type AnalysisError,
+} from "../domain/errors.js";
+import { access } from "node:fs/promises";
+import {
+  readAnalysisSnapshot,
+  writeAnalysisSnapshot,
+} from "./AnalysisSnapshotFiles.js";
+import { parseBinaryTarget } from "../domain/binaryTarget.js";
+import {
+  snapshotEvidenceForQuery,
+  snapshotMatchesTarget,
+} from "../domain/analysisSnapshot.js";
+import { err, ok, type Result } from "../domain/result.js";
+import type { AnalysisSnapshot } from "../domain/analysisSnapshot.js";
 
 const WORKFLOW_PROVIDER = {
   id: "rea-workflow",
@@ -32,8 +49,15 @@ export const runDirectAnalysis = async (
   path: string,
   tool: DirectAnalysisTool,
   arguments_: Readonly<Record<string, JsonValue>>,
-  logger: Logger = silentLogger,
-): Promise<JsonValue> => runAnalysis(path, tool, arguments_, logger);
+  options: {
+    readonly logger?: Logger;
+    readonly snapshotPath?: string | undefined;
+  } = {},
+): Promise<JsonValue> =>
+  runAnalysis(path, tool, arguments_, {
+    logger: options.logger ?? silentLogger,
+    snapshotPath: options.snapshotPath,
+  });
 
 /** Execute one provider-native semantic operation with atomic provenance. */
 export const runProviderAnalysis = async (
@@ -41,7 +65,8 @@ export const runProviderAnalysis = async (
   tool: NativeToolName | ArtifactToolName,
   arguments_: Readonly<Record<string, JsonValue>>,
   logger: Logger = silentLogger,
-): Promise<JsonValue> => runAnalysis(path, tool, arguments_, logger);
+): Promise<JsonValue> =>
+  runAnalysis(path, tool, arguments_, { logger, snapshotPath: undefined });
 
 /** Describe configured providers without opening a target or launching Hopper. */
 export const runSessionStatus = async (
@@ -61,39 +86,67 @@ const runAnalysis = async (
   path: string,
   tool: NativeToolName | ArtifactToolName | DirectAnalysisTool,
   arguments_: Readonly<Record<string, JsonValue>>,
-  logger: Logger,
+  options: {
+    readonly logger: Logger;
+    readonly snapshotPath: string | undefined;
+  },
 ): Promise<JsonValue> => {
+  const { logger, snapshotPath } = options;
   const config = parseConfig(process.env);
   if (!config.ok) return cliError(config.error);
+  const unavailable = snapshotUnavailable(
+    snapshotPath,
+    config.value.hopperLoaderArgs,
+  );
+  if (unavailable !== undefined) return cliError(unavailable);
   const session = createBinarySession(config.value, logger);
   try {
-    const opened = await session.open(path);
+    const prepared = await prepareSnapshot({
+      path,
+      tool,
+      arguments: arguments_,
+      snapshotPath,
+      policy: config.value.analysisSnapshotFilePolicy,
+      provider: replayProviderFor(session, tool),
+    });
+    if (!prepared.ok) return cliError(prepared.error);
+    if (prepared.value.evidence !== undefined) return prepared.value.evidence;
+    const { snapshot } = prepared.value;
+    const opened = await session.open(
+      path,
+      snapshot === undefined ? {} : { snapshot },
+    );
     if (!opened.ok) return cliError(opened.error);
+    let output: JsonValue;
+    let evidence: Evidence | undefined;
     if (
       tool === "binary_overview" ||
       tool === "analyze_function" ||
       tool === "trace_feature"
     ) {
       const result = await new EnhancedTools(session).execute(tool, arguments_);
-      return result.ok
-        ? createEvidence(
-            opened.value,
-            tool === "analyze_function"
-              ? session.providerIdentity(tool)
-              : WORKFLOW_PROVIDER,
-            {
-              operation: tool,
-              parameters: arguments_,
-              result: result.value,
-              confidence: "derived",
-              limitations: ["Derived by an REA composed workflow."],
-            },
-          )
-        : cliError(result.error);
-    }
-    const result = await session.execute(tool, arguments_);
-    return result.ok
-      ? createEvidence(
+      if (!result.ok) output = cliError(result.error);
+      else {
+        evidence = createEvidence(
+          opened.value,
+          tool === "analyze_function"
+            ? session.providerIdentity(tool)
+            : WORKFLOW_PROVIDER,
+          {
+            operation: tool,
+            parameters: arguments_,
+            result: result.value,
+            confidence: "derived",
+            limitations: ["Derived by an REA composed workflow."],
+          },
+        );
+        output = evidence;
+      }
+    } else {
+      const result = await session.execute(tool, arguments_);
+      if (!result.ok) output = cliError(result.error);
+      else {
+        evidence = createEvidence(
           result.value.subject ?? opened.value,
           result.value.provider,
           {
@@ -104,13 +157,108 @@ const runAnalysis = async (
             limitations: result.value.limitations,
             locations: result.value.locations,
           },
-        )
-      : cliError(result.error);
+        );
+        output = evidence;
+      }
+    }
+    if (evidence !== undefined) session.recordEvidence(evidence);
+    if (snapshotPath !== undefined && evidence !== undefined) {
+      const snapshot = session.exportAnalysisSnapshot();
+      if (!snapshot.ok) return cliError(snapshot.error);
+      const written = await writeAnalysisSnapshot(
+        snapshot.value,
+        snapshotPath,
+        true,
+        config.value.analysisSnapshotFilePolicy,
+      );
+      if (!written.ok) return cliError(written.error);
+    }
+    return output;
   } finally {
     await session.close();
   }
 };
 
+const prepareSnapshot = async (options: {
+  readonly path: string;
+  readonly tool: string;
+  readonly arguments: Readonly<Record<string, JsonValue>>;
+  readonly snapshotPath: string | undefined;
+  readonly policy: Parameters<typeof readAnalysisSnapshot>[1];
+  readonly provider: Parameters<typeof snapshotEvidenceForQuery>[1]["provider"];
+}): Promise<
+  Result<
+    { readonly snapshot?: AnalysisSnapshot; readonly evidence?: Evidence },
+    AnalysisError
+  >
+> => {
+  const {
+    path,
+    tool,
+    arguments: arguments_,
+    snapshotPath,
+    policy,
+    provider,
+  } = options;
+  if (snapshotPath === undefined || !(await fileExists(snapshotPath)))
+    return ok({});
+  const loaded = await readAnalysisSnapshot(snapshotPath, policy);
+  if (!loaded.ok) return loaded;
+  const target = await parseBinaryTarget(path);
+  if (!target.ok) return target;
+  if (!snapshotMatchesTarget(loaded.value.target, target.value))
+    return err(
+      new EvidenceIntegrityError(
+        "Analysis snapshot target does not match the requested binary",
+      ),
+    );
+  const evidence = snapshotEvidenceForQuery(loaded.value, {
+    target: target.value,
+    operation: tool,
+    parameters: arguments_,
+    provider,
+  });
+  return ok(
+    evidence === undefined
+      ? { snapshot: loaded.value }
+      : { snapshot: loaded.value, evidence },
+  );
+};
+
+const snapshotUnavailable = (
+  snapshotPath: string | undefined,
+  loaderArgs: readonly string[],
+): EvidenceIntegrityError | undefined =>
+  snapshotPath !== undefined && loaderArgs.length > 0
+    ? new EvidenceIntegrityError(
+        "Analysis snapshots are unavailable with custom Hopper loader arguments",
+      )
+    : undefined;
+
+const replayProviderFor = (
+  session: ReturnType<typeof createBinarySession>,
+  tool: NativeToolName | ArtifactToolName | DirectAnalysisTool,
+) =>
+  tool === "binary_overview" || tool === "trace_feature"
+    ? WORKFLOW_PROVIDER
+    : session.providerIdentity(tool);
+
+const fileExists = async (path: string): Promise<boolean> => {
+  try {
+    await access(path);
+    return true;
+  } catch (cause: unknown) {
+    if (
+      typeof cause === "object" &&
+      cause !== null &&
+      "code" in cause &&
+      cause.code === "ENOENT"
+    )
+      return false;
+    throw cause;
+  }
+};
+
 const cliError = (error: AnalysisError): JsonValue => ({
   error: "Analysis failed",
   ...projectAnalysisError(error),
diff --git a/src/application/EvidenceBundleFiles.ts b/src/application/EvidenceBundleFiles.ts
index d3b4a3886..7febb5fce 100644
--- a/src/application/EvidenceBundleFiles.ts
+++ b/src/application/EvidenceBundleFiles.ts
@@ -1,8 +1,3 @@
-import { lstat, readFile, realpath } from "node:fs/promises";
-import { basename, dirname, isAbsolute, relative, resolve } from "node:path";
-
-import writeFileAtomic from "write-file-atomic";
-
 import {
   parseEvidenceBundle,
   serializeEvidenceBundle,
@@ -15,6 +10,7 @@ import {
   LEGACY_PROCESS_CAPTURE_MESSAGE,
   parseProcessCapture,
 } from "../domain/processCapture.js";
+import { readBoundedJson, writeBoundedText } from "./BoundedJsonFiles.js";
 
 type EvidenceReadFailure = EvidenceFileError | EvidenceIntegrityError;
 type EvidenceWriteFailure = EvidenceFileError | EvidenceIntegrityError;
@@ -26,43 +22,23 @@ export const readEvidenceBundle = async (
 ): Promise<Result<EvidenceBundle, EvidenceReadFailure>> => {
   if (policy.roots.length === 0)
     return err(new EvidenceFileError("read", "disabled"));
+  const loaded = await readBoundedJson(path, policy);
+  if (!loaded.ok) return loaded;
   try {
-    const canonicalPath = await realpath(resolve(path));
-    if (!(await isApproved(canonicalPath, policy.roots)))
-      return err(new EvidenceFileError("read", "outside-root"));
-    const stats = await lstat(canonicalPath);
-    if (!stats.isFile()) return err(new EvidenceFileError("read", "not-file"));
-    if (stats.size > policy.maxBytes)
-      return err(new EvidenceFileError("read", "too-large"));
-    const encoded = await readFile(canonicalPath);
-    if (encoded.byteLength > policy.maxBytes)
-      return err(new EvidenceFileError("read", "too-large"));
-    let decoded: unknown;
-    try {
-      decoded = JSON.parse(encoded.toString("utf8"));
-    } catch (cause: unknown) {
-      return err(new EvidenceFileError("read", "invalid-json", { cause }));
-    }
-    const limits = validateJsonLimits(decoded, policy);
-    if (!limits.ok) return limits;
-    try {
-      const bundle = parseEvidenceBundle(decoded);
-      for (const record of bundle.records) {
-        if (record.predicate_type === "rea.process-capture/v3")
-          throw new TypeError(LEGACY_PROCESS_CAPTURE_MESSAGE);
-        if (record.predicate_type === "rea.process-capture/v4")
-          parseProcessCapture(record.normalized_result);
-      }
-      return ok(bundle);
-    } catch (cause: unknown) {
-      return err(
-        new EvidenceIntegrityError("Evidence bundle validation failed", {
-          cause,
-        }),
-      );
+    const bundle = parseEvidenceBundle(loaded.value);
+    for (const record of bundle.records) {
+      if (record.predicate_type === "rea.process-capture/v3")
+        throw new TypeError(LEGACY_PROCESS_CAPTURE_MESSAGE);
+      if (record.predicate_type === "rea.process-capture/v4")
+        parseProcessCapture(record.normalized_result);
     }
+    return ok(bundle);
   } catch (cause: unknown) {
-    return err(new EvidenceFileError("read", "io", { cause }));
+    return err(
+      new EvidenceIntegrityError("Evidence bundle validation failed", {
+        cause,
+      }),
+    );
   }
 };
 
@@ -90,82 +66,5 @@ export const writeEvidenceBundle = async (
       }),
     );
   }
-  const bytes = Buffer.byteLength(encoded, "utf8");
-  if (bytes > policy.maxBytes)
-    return err(new EvidenceFileError("write", "too-large"));
-  try {
-    const requestedPath = resolve(path);
-    const canonicalParent = await realpath(dirname(requestedPath));
-    const destination = resolve(canonicalParent, basename(requestedPath));
-    if (!(await isApproved(destination, policy.roots)))
-      return err(new EvidenceFileError("write", "outside-root"));
-    const existing = await lstat(destination).catch((cause: unknown) => {
-      if (isFileNotFound(cause)) return undefined;
-      throw cause;
-    });
-    if (existing !== undefined) {
-      if (!overwrite) return err(new EvidenceFileError("write", "exists"));
-      if (!existing.isFile() || existing.isSymbolicLink())
-        return err(new EvidenceFileError("write", "not-file"));
-    }
-    await writeFileAtomic(destination, encoded, {
-      encoding: "utf8",
-      mode: 0o600,
-      fsync: true,
-    });
-    return ok({ path: requestedPath, bytes });
-  } catch (cause: unknown) {
-    return err(new EvidenceFileError("write", "io", { cause }));
-  }
+  return writeBoundedText(encoded, path, overwrite, policy);
 };
-
-const isApproved = async (
-  candidate: string,
-  roots: readonly string[],
-): Promise<boolean> => {
-  for (const configuredRoot of roots) {
-    const root = await realpath(resolve(configuredRoot));
-    const relation = relative(root, candidate);
-    if (
-      relation === "" ||
-      (!relation.startsWith("..") && !isAbsolute(relation))
-    )
-      return true;
-  }
-  return false;
-};
-
-const validateJsonLimits = (
-  root: unknown,
-  policy: EvidenceFilePolicy,
-): Result<null, EvidenceFileError> => {
-  const pending: Array<{ readonly value: unknown; readonly depth: number }> = [
-    { value: root, depth: 0 },
-  ];
-  let nodes = 0;
-  while (pending.length > 0) {
-    const current = pending.pop();
-    if (current === undefined) break;
-    nodes += 1;
-    if (nodes > policy.maxNodes || current.depth > policy.maxDepth)
-      return err(new EvidenceFileError("read", "too-large"));
-    if (
-      typeof current.value === "string" &&
-      current.value.length > policy.maxStringLength
-    )
-      return err(new EvidenceFileError("read", "too-large"));
-    if (typeof current.value !== "object" || current.value === null) continue;
-    for (const [key, value] of Object.entries(current.value)) {
-      if (key.length > policy.maxStringLength)
-        return err(new EvidenceFileError("read", "too-large"));
-      pending.push({ value, depth: current.depth + 1 });
-    }
-  }
-  return ok(null);
-};
-
-const isFileNotFound = (cause: unknown): boolean =>
-  typeof cause === "object" &&
-  cause !== null &&
-  "code" in cause &&
-  cause.code === "ENOENT";
diff --git a/src/application/UnknownEvidence.ts b/src/application/UnknownEvidence.ts
new file mode 100644
index 000000000..cbc515e18
--- /dev/null
+++ b/src/application/UnknownEvidence.ts
@@ -0,0 +1,49 @@
+import type { BinaryTarget } from "../domain/binaryTarget.js";
+import { createEvidence, type Evidence } from "../domain/evidence.js";
+import type {
+  RecordUnknownInput,
+  UpdateUnknownInput,
+} from "../domain/residualUnknown.js";
+import type { ProviderIdentity } from "./AnalysisProvider.js";
+
+/** Provider identity for analyst-authored residual-unknown mutations. */
+export const UNKNOWN_REGISTRY_PROVIDER: ProviderIdentity = {
+  id: "rea-unknown-registry",
+  name: "REA residual unknown registry",
+  version: "1",
+};
+
+/** Create immutable evidence for one approved residual-unknown mutation. */
+export const unknownMutationEvidence = (
+  target: BinaryTarget | undefined,
+  input: RecordUnknownInput,
+): Evidence =>
+  createEvidence(target, UNKNOWN_REGISTRY_PROVIDER, {
+    predicateType: "rea.residual-unknown-mutation/v1",
+    operation: "record_unknown",
+    parameters: { domain: input.domain, severity: input.severity },
+    result: {
+      action: "record",
+      question: input.question,
+      required_authority: input.required_authority,
+      required_confidence: input.required_confidence,
+    },
+    confidence: "derived",
+    authority: "analyst-inference",
+    evidenceLinks: unknownEvidenceLinks(input),
+    limitations: [
+      "Registry mutation evidence records analyst intent, not proof of the answer.",
+    ],
+  });
+
+/** Deduplicate evidence links carried by an unknown mutation. */
+export const unknownEvidenceLinks = (
+  input: RecordUnknownInput | UpdateUnknownInput,
+): string[] =>
+  [
+    ...input.supporting_evidence_ids,
+    ...input.contradicting_evidence_ids,
+    ...("resolution" in input && input.resolution !== null
+      ? input.resolution.evidence_ids
+      : []),
+  ].filter((id, index, values) => values.indexOf(id) === index);
diff --git a/src/application/runtime.ts b/src/application/runtime.ts
index 9dafb2330..ed7f647a9 100644
--- a/src/application/runtime.ts
+++ b/src/application/runtime.ts
@@ -21,5 +21,6 @@ export const createBinarySession = (
       new NativeMacOSProvider(),
       new HopperProvider(config, logger),
     ]),
+    { snapshotsEnabled: config.hopperLoaderArgs.length === 0 },
   );
 };
diff --git a/src/cli.ts b/src/cli.ts
index ac257e5c2..99d1d7f13 100644
--- a/src/cli.ts
+++ b/src/cli.ts
@@ -74,6 +74,11 @@ const registerCoreCommands = (
   const overviewOptions = z.object({
     detail: z.enum(["concise", "detailed"]).default("concise"),
     limit: z.number().int().min(1).max(50).default(10),
+    snapshot: z
+      .string()
+      .min(1)
+      .optional()
+      .describe("Load and update a local analysis snapshot"),
   });
   cli.command("analyze", {
     description: "Get an overview of an app",
@@ -87,7 +92,7 @@ const registerCoreCommands = (
           args.path,
           "binary_overview",
           { detail: options.detail, limit: options.limit },
-          logger,
+          { logger, snapshotPath: options.snapshot },
         ),
       ),
   });
@@ -103,7 +108,7 @@ const registerCoreCommands = (
           args.path,
           "binary_overview",
           { detail: options.detail, limit: options.limit },
-          logger,
+          { logger, snapshotPath: options.snapshot },
         ),
       ),
   });
@@ -113,13 +118,14 @@ const registerCoreCommands = (
       path: z.string().describe("App or program path"),
       address: z.string().describe("Procedure address"),
     }),
-    run: ({ args }) =>
+    options: z.object({ snapshot: z.string().min(1).optional() }),
+    run: ({ args, options }) =>
       logCliCommand(logger, "decompile", () =>
         runDirectAnalysis(
           args.path,
           "procedure_pseudo_code",
           { procedure: args.address },
-          logger,
+          { logger, snapshotPath: options.snapshot },
         ),
       ),
   });
@@ -222,13 +228,14 @@ const registerXrefsCommand = (
       path: z.string().describe("App or program path"),
       address: z.string().describe("Hexadecimal address"),
     }),
-    run: ({ args }) =>
+    options: z.object({ snapshot: z.string().min(1).optional() }),
+    run: ({ args, options }) =>
       logCliCommand(logger, "xrefs", () =>
         runDirectAnalysis(
           args.path,
           "xrefs",
           { address: args.address },
-          logger,
+          { logger, snapshotPath: options.snapshot },
         ),
       ),
   });
@@ -248,6 +255,7 @@ const registerTraceCommand = (
       caseSensitive: z.boolean().default(false),
       limit: z.number().int().min(1).max(100).default(20),
       maxOperations: z.number().int().min(1).max(100).default(20),
+      snapshot: z.string().min(1).optional(),
     }),
     alias: {
       caseSensitive: "case-sensitive",
@@ -264,7 +272,7 @@ const registerTraceCommand = (
             limit: options.limit,
             max_operations: options.maxOperations,
           },
-          logger,
+          { logger, snapshotPath: options.snapshot },
         ),
       ),
   });
@@ -300,6 +308,7 @@ const registerFunctionCommand = (
       limit: z.number().int().min(1).max(500).default(100),
       maxPseudocodeChars: z.number().int().min(1).max(100_000).default(20_000),
       maxInstructions: z.number().int().min(1).max(5_000).default(500),
+      snapshot: z.string().min(1).optional(),
     }),
     alias: {
       includeAssembly: "include-assembly",
@@ -318,7 +327,7 @@ const registerFunctionCommand = (
             max_pseudocode_chars: options.maxPseudocodeChars,
             max_instructions: options.maxInstructions,
           },
-          logger,
+          { logger, snapshotPath: options.snapshot },
         ),
       ),
   });
@@ -340,6 +349,7 @@ const registerSearchCommand = (
       caseSensitive: z.boolean().default(false),
       offset: z.number().int().min(0).default(0),
       limit: z.number().int().min(1).max(100).default(100),
+      snapshot: z.string().min(1).optional(),
     }),
     alias: { caseSensitive: "case-sensitive" },
     run: ({ args, options }) =>
@@ -354,7 +364,7 @@ const registerSearchCommand = (
             offset: options.offset,
             limit: options.limit,
           },
-          logger,
+          { logger, snapshotPath: options.snapshot },
         ),
       ),
   });
diff --git a/src/config.ts b/src/config.ts
index 6554bbcf0..31d6b1090 100644
--- a/src/config.ts
+++ b/src/config.ts
@@ -23,6 +23,7 @@ export interface AppConfig {
   readonly processExecutionPolicy: ProcessExecutionPolicy;
   readonly artifactNativeMountEnabled: boolean;
   readonly evidenceFilePolicy: EvidenceFilePolicy;
+  readonly analysisSnapshotFilePolicy: EvidenceFilePolicy;
   readonly referenceSourcePolicy: ReferenceSourcePolicy;
 }
 
@@ -43,6 +44,7 @@ const environmentSchema = z.object({
   REA_PROCESS_WORKING_ROOTS_JSON: z.string().default("[]"),
   REA_PROCESS_ALLOWED_ENV_JSON: z.string().default("[]"),
   REA_EVIDENCE_ROOTS_JSON: z.string().default("[]"),
+  REA_ANALYSIS_SNAPSHOT_ROOTS_JSON: z.string().default("[]"),
   REA_REFERENCE_ROOTS_JSON: z.string().default("[]"),
   REA_REFERENCE_SECRET_PATTERNS_JSON: z.string().default("[]"),
 });
@@ -68,6 +70,14 @@ const parseStringArray = (
   }
 };
 
+const filePolicy = (roots: readonly string[]): EvidenceFilePolicy => ({
+  roots,
+  maxBytes: 64 * 1024 * 1024,
+  maxDepth: 64,
+  maxStringLength: 1024 * 1024,
+  maxNodes: 1_000_000,
+});
+
 /**
  * Parse Hopper launcher configuration once at the composition root.
  * Explicit loader arguments override REA's header-derived defaults for a
@@ -127,6 +137,11 @@ export const parseConfig = (
     "REA_EVIDENCE_ROOTS_JSON",
   );
   if (!evidenceRoots.ok) return evidenceRoots;
+  const analysisSnapshotRoots = parseStringArray(
+    parsedEnvironment.data.REA_ANALYSIS_SNAPSHOT_ROOTS_JSON,
+    "REA_ANALYSIS_SNAPSHOT_ROOTS_JSON",
+  );
+  if (!analysisSnapshotRoots.ok) return analysisSnapshotRoots;
   const referenceRoots = parseStringArray(
     parsedEnvironment.data.REA_REFERENCE_ROOTS_JSON,
     "REA_REFERENCE_ROOTS_JSON",
@@ -155,13 +170,8 @@ export const parseConfig = (
     },
     artifactNativeMountEnabled:
       parsedEnvironment.data.REA_ARTIFACT_NATIVE_MOUNT_ENABLED === "true",
-    evidenceFilePolicy: {
-      roots: evidenceRoots.value,
-      maxBytes: 64 * 1024 * 1024,
-      maxDepth: 64,
-      maxStringLength: 1024 * 1024,
-      maxNodes: 1_000_000,
-    },
+    evidenceFilePolicy: filePolicy(evidenceRoots.value),
+    analysisSnapshotFilePolicy: filePolicy(analysisSnapshotRoots.value),
     referenceSourcePolicy: {
       roots: referenceRoots.value,
       secretPatterns: secretPatterns.value,
diff --git a/src/contracts/sessionLifecycleInputs.ts b/src/contracts/sessionLifecycleInputs.ts
new file mode 100644
index 000000000..4cdfeaada
--- /dev/null
+++ b/src/contracts/sessionLifecycleInputs.ts
@@ -0,0 +1,13 @@
+import { z } from "zod";
+
+/** Input contract for opening a target with an optional staged snapshot. */
+export const openBinaryInputSchema = z.object({
+  path: z.string().min(1),
+  snapshot_path: z.string().min(1).optional(),
+});
+
+/** Input contract for closing a target after an optional atomic snapshot. */
+export const closeBinaryInputSchema = z.object({
+  snapshot_path: z.string().min(1).optional(),
+  overwrite: z.boolean().default(false),
+});
diff --git a/src/contracts/toolContractTypes.ts b/src/contracts/toolContractTypes.ts
new file mode 100644
index 000000000..762947798
--- /dev/null
+++ b/src/contracts/toolContractTypes.ts
@@ -0,0 +1,36 @@
+import type { z } from "zod";
+
+import type { JsonValue } from "../domain/jsonValue.js";
+
+/** Caller-visible MCP execution hints. */
+export interface ToolAnnotations {
+  readonly readOnlyHint: boolean;
+  readonly destructiveHint: boolean;
+  readonly idempotentHint: boolean;
+  readonly openWorldHint: boolean;
+}
+
+/** One validated example request for an MCP tool contract. */
+export interface ToolExample {
+  readonly title: string;
+  readonly input: Readonly<Record<string, JsonValue>>;
+}
+
+/** Adapter family responsible for implementing a public MCP tool. */
+export type ToolKind =
+  | "official-proxy"
+  | "enhanced"
+  | "native-provider"
+  | "artifact-provider"
+  | "session";
+
+/** Single source of truth for a public MCP tool. */
+export interface ToolContract<Name extends string = string> {
+  readonly name: Name;
+  readonly description: string;
+  readonly kind: ToolKind;
+  readonly inputSchema: z.ZodObject;
+  readonly outputSchema: z.ZodObject;
+  readonly annotations: ToolAnnotations;
+  readonly examples: readonly ToolExample[];
+}
diff --git a/src/contracts/toolContracts.ts b/src/contracts/toolContracts.ts
index b92c97fc9..c2351e5e1 100644
--- a/src/contracts/toolContracts.ts
+++ b/src/contracts/toolContracts.ts
@@ -1,5 +1,5 @@
 import { z } from "zod";
-import { jsonValueSchema, type JsonValue } from "../domain/jsonValue.js";
+import { jsonValueSchema } from "../domain/jsonValue.js";
 import {
   processCaptureSchema,
   processScenarioSchema,
@@ -26,6 +26,22 @@ import {
 import { TOOL_EXAMPLE_OVERRIDES } from "./toolContractExamples.js";
 import { NATIVE_TOOL_CONTRACTS } from "./nativeToolContracts.js";
 import { ARTIFACT_TOOL_CONTRACTS } from "./artifactToolContracts.js";
+import {
+  closeBinaryInputSchema,
+  openBinaryInputSchema,
+} from "./sessionLifecycleInputs.js";
+import type {
+  ToolAnnotations,
+  ToolContract,
+  ToolExample,
+  ToolKind,
+} from "./toolContractTypes.js";
+
+export type {
+  ToolAnnotations,
+  ToolContract,
+  ToolExample,
+} from "./toolContractTypes.js";
 
 const document = z.string().optional().describe("The document name");
 const address = z.string().describe("A Hopper address");
@@ -53,37 +69,6 @@ const searchInput = {
   document,
 };
 
-export interface ToolAnnotations {
-  readonly readOnlyHint: boolean;
-  readonly destructiveHint: boolean;
-  readonly idempotentHint: boolean;
-  readonly openWorldHint: boolean;
-}
-
-export interface ToolExample {
-  readonly title: string;
-  readonly input: Readonly<Record<string, JsonValue>>;
-}
-
-/** Adapter family responsible for implementing a public MCP tool. */
-type ToolKind =
-  | "official-proxy"
-  | "enhanced"
-  | "native-provider"
-  | "artifact-provider"
-  | "session";
-
-/** Single source of truth for a public tool's name, description, and input. */
-export interface ToolContract<Name extends string = string> {
-  readonly name: Name;
-  readonly description: string;
-  readonly kind: ToolKind;
-  readonly inputSchema: z.ZodObject;
-  readonly outputSchema: z.ZodObject;
-  readonly annotations: ToolAnnotations;
-  readonly examples: readonly ToolExample[];
-}
-
 const exampleInputSchema = z.record(z.string(), jsonValueSchema);
 const examplesFor = (
   name: string,
@@ -106,12 +91,16 @@ const annotations = (name: string, kind: ToolKind): ToolAnnotations => ({
     name === "verify_unknown_resolution",
   destructiveHint:
     name === "export_evidence_bundle" ||
+    name === "close_binary" ||
     name === "unset_bookmark" ||
     name === "set_address_name" ||
     name === "set_addresses_names" ||
     name === "set_comment" ||
     name === "set_inline_comment",
-  idempotentHint: name !== "record_unknown" && name !== "update_unknown",
+  idempotentHint:
+    name !== "close_binary" &&
+    name !== "record_unknown" &&
+    name !== "update_unknown",
   openWorldHint: name === "capture_process_scenario",
 });
 
@@ -404,13 +393,13 @@ export const ENHANCED_TOOL_CONTRACTS = [
 export const SESSION_TOOL_CONTRACTS = [
   session(
     "open_binary",
-    "Open a local executable, application bundle, archive, JavaScript, source map, plist, or Hopper database after validation. Providers start lazily: inventory_artifact does not launch Hopper; deep native operations may show Hopper UI.",
-    z.object({ path: z.string().min(1) }),
+    "Open a local executable, application bundle, archive, JavaScript, source map, plist, or Hopper database after validation. An optional provider-neutral snapshot is imported atomically and must match the binary digest, format, and architecture exactly; provider resources may still start before an MCP cache replay.",
+    openBinaryInputSchema,
   ),
   session(
     "close_binary",
-    "Close the active target and every provider resource started for it. The operation is idempotent; call binary_session to verify the session is closed.",
-    z.object({}),
+    "Optionally write a provider-neutral analysis snapshot atomically, then close the active target and every provider resource started for it. Snapshot files require an operator-approved root and explicit overwrite; a failed save leaves the session open so cached analysis is not lost.",
+    closeBinaryInputSchema,
   ),
   session(
     "binary_session",
diff --git a/src/contracts/toolOutputSchemas.ts b/src/contracts/toolOutputSchemas.ts
index 4f65576ce..c03dbbba2 100644
--- a/src/contracts/toolOutputSchemas.ts
+++ b/src/contracts/toolOutputSchemas.ts
@@ -385,7 +385,16 @@ export const sessionOutputSchemas: Readonly<Record<string, z.ZodObject>> = {
       architecture: z.enum(["x86", "x86_64", "arm", "arm64"]).nullable(),
     }),
   ),
-  close_binary: lifecycleResultOf(z.null()),
+  close_binary: lifecycleResultOf(
+    z.union([
+      z.null(),
+      z.object({
+        path: z.string(),
+        bytes: z.number().int().min(0),
+        entries: z.number().int().min(0),
+      }),
+    ]),
+  ),
   binary_session: lifecycleResultOf(
     z.union([
       sessionProvider.extend({ open: z.literal(false) }),
diff --git a/src/domain/analysisSnapshot.ts b/src/domain/analysisSnapshot.ts
new file mode 100644
index 000000000..2c3d83bd9
--- /dev/null
+++ b/src/domain/analysisSnapshot.ts
@@ -0,0 +1,226 @@
+import { createHash } from "node:crypto";
+
+import canonicalize from "canonicalize";
+import { z } from "zod";
+
+import type {
+  AnalysisExecution,
+  AnalysisOperation,
+} from "../application/AnalysisProvider.js";
+import type { BinaryTarget } from "./binaryTarget.js";
+import {
+  evidenceBundleForTarget,
+  evidenceBundleSchema,
+  parseEvidenceBundle,
+} from "./evidenceBundle.js";
+import {
+  evidenceLocationSchema,
+  providerSchema,
+  type Evidence,
+} from "./evidence.js";
+import {
+  jsonObjectSchema,
+  jsonValueSchema,
+  type JsonValue,
+} from "./jsonValue.js";
+
+const digestSchema = z.string().regex(/^[a-f0-9]{64}$/u);
+const architectureSchema = z.enum(["x86", "x86_64", "arm", "arm64"]);
+const formatSchema = z.enum([
+  "hopper",
+  "mach-o",
+  "elf",
+  "pe",
+  "zip",
+  "ipa",
+  "apk",
+  "asar",
+  "dmg",
+  "pkg",
+  "plist",
+  "javascript",
+  "source-map",
+]);
+const subjectSchema = z.object({
+  path: z.string().min(1),
+  sha256: digestSchema,
+  format: z.enum([
+    ...formatSchema.options,
+    "directory",
+    "file",
+    "unknown",
+    "mach-o-universal",
+    "javascript-bundle",
+    "entitlements",
+  ]),
+  architecture: architectureSchema.nullable(),
+});
+const targetSchema = z.object({
+  sha256: digestSchema,
+  format: formatSchema,
+  architecture: architectureSchema.nullable(),
+  loader_args: z.array(z.string()),
+});
+const entrySchema = z.object({
+  query_id: z.string().regex(/^query_[a-f0-9]{64}$/u),
+  operation: z.string().min(1),
+  parameters: jsonObjectSchema,
+  execution: z.object({
+    result: jsonValueSchema,
+    raw_result: jsonValueSchema.nullable(),
+    provider: providerSchema,
+    limitations: z.array(z.string()),
+    locations: z.array(evidenceLocationSchema),
+    subject: subjectSchema.nullable(),
+  }),
+});
+
+/** Provider-neutral, deterministic cache of successful immutable analysis calls. */
+const analysisSnapshotSchema = z.object({
+  snapshot_version: z.literal(1),
+  target: targetSchema,
+  entries: z.array(entrySchema).max(10_000),
+  evidence_bundle: evidenceBundleSchema,
+});
+
+export type AnalysisSnapshot = z.infer<typeof analysisSnapshotSchema>;
+export type AnalysisSnapshotEntry = z.infer<typeof entrySchema>;
+export type AnalysisSnapshotTarget = z.infer<typeof targetSchema>;
+
+const canonicalJson = (value: unknown): string => {
+  const json = jsonValueSchema.parse(value);
+  const encoded = canonicalize(json);
+  if (encoded === undefined)
+    throw new TypeError("RFC 8785 canonicalization rejected snapshot data");
+  return encoded;
+};
+
+/** Project a binary into the path-free identity used for cache invalidation. */
+export const snapshotTarget = (
+  target: BinaryTarget,
+): AnalysisSnapshotTarget => ({
+  sha256: target.sha256,
+  format: target.format,
+  architecture: target.architecture ?? null,
+  loader_args: [...target.loaderArgs],
+});
+
+/** Compare an open binary with the immutable identity in a snapshot. */
+export const snapshotMatchesTarget = (
+  snapshot: AnalysisSnapshotTarget,
+  target: BinaryTarget,
+): boolean =>
+  snapshot.sha256 === target.sha256 &&
+  snapshot.format === target.format &&
+  snapshot.architecture === (target.architecture ?? null) &&
+  JSON.stringify(snapshot.loader_args) === JSON.stringify(target.loaderArgs);
+
+/** Find exact persisted CLI evidence without starting an analysis provider. */
+export const snapshotEvidenceForQuery = (
+  snapshot: AnalysisSnapshot,
+  query: {
+    readonly target: BinaryTarget;
+    readonly operation: string;
+    readonly parameters: Readonly<Record<string, JsonValue>>;
+    readonly provider: AnalysisExecution["provider"];
+  },
+): Evidence | undefined => {
+  const { target, operation, parameters, provider } = query;
+  if (!snapshotMatchesTarget(snapshot.target, target)) return undefined;
+  const encodedParameters = canonicalJson(parameters);
+  return snapshot.evidence_bundle.records.find(
+    (record) =>
+      record.subject?.digest.sha256 === target.sha256 &&
+      record.operation === operation &&
+      record.provider.id === provider.id &&
+      record.provider.name === provider.name &&
+      record.provider.version === provider.version &&
+      canonicalJson(record.parameters) === encodedParameters,
+  );
+};
+
+/** Compute the stable lookup key for one provider-specific analysis query. */
+export const analysisQueryId = (
+  target: AnalysisSnapshotTarget,
+  operation: string,
+  parameters: Readonly<Record<string, JsonValue>>,
+  provider: AnalysisExecution["provider"],
+): string =>
+  `query_${createHash("sha256")
+    .update(
+      canonicalJson({
+        target,
+        operation,
+        parameters,
+        provider: {
+          id: provider.id,
+          name: provider.name,
+          version: provider.version,
+        },
+      }),
+    )
+    .digest("hex")}`;
+
+/** Create one serializable snapshot entry from a successful provider call. */
+export const createAnalysisSnapshotEntry = (
+  target: AnalysisSnapshotTarget,
+  operation: AnalysisOperation,
+  parameters: Readonly<Record<string, JsonValue>>,
+  execution: AnalysisExecution,
+): AnalysisSnapshotEntry => ({
+  query_id: analysisQueryId(target, operation, parameters, execution.provider),
+  operation,
+  parameters: jsonObjectSchema.parse(parameters),
+  execution: {
+    result: execution.result,
+    raw_result: execution.rawResult,
+    provider: execution.provider,
+    limitations: [...execution.limitations],
+    locations: [...execution.locations],
+    subject:
+      execution.subject === null
+        ? null
+        : {
+            ...execution.subject,
+            architecture: execution.subject.architecture ?? null,
+          },
+  },
+});
+
+/** Parse a snapshot and reject altered query IDs or non-canonical entry order. */
+export const parseAnalysisSnapshot = (input: unknown): AnalysisSnapshot => {
+  const parsed = analysisSnapshotSchema.parse(input);
+  parseEvidenceBundle(parsed.evidence_bundle);
+  if (
+    JSON.stringify(
+      evidenceBundleForTarget(parsed.evidence_bundle, parsed.target.sha256),
+    ) !== JSON.stringify(parsed.evidence_bundle)
+  )
+    throw new TypeError(
+      "Analysis snapshot evidence contains records for another target",
+    );
+  const ids = new Set<string>();
+  for (const entry of parsed.entries) {
+    const expected = analysisQueryId(
+      parsed.target,
+      entry.operation,
+      entry.parameters,
+      entry.execution.provider,
+    );
+    if (entry.query_id !== expected)
+      throw new TypeError("Analysis snapshot query identifier does not match");
+    if (ids.has(entry.query_id))
+      throw new TypeError("Analysis snapshot contains duplicate queries");
+    ids.add(entry.query_id);
+  }
+  const sorted = [...parsed.entries].sort((left, right) =>
+    left.query_id.localeCompare(right.query_id),
+  );
+  if (JSON.stringify(parsed.entries) !== JSON.stringify(sorted))
+    throw new TypeError("Analysis snapshot entries are not canonical");
+  return parsed;
+};
+
+/** Serialize a validated snapshot with byte-stable canonical entry ordering. */
+export const serializeAnalysisSnapshot = (snapshot: AnalysisSnapshot): string =>
+  `${canonicalJson(parseAnalysisSnapshot(snapshot))}\n`;
diff --git a/src/domain/evidence.ts b/src/domain/evidence.ts
index 8e487cfbe..982f51494 100644
--- a/src/domain/evidence.ts
+++ b/src/domain/evidence.ts
@@ -7,7 +7,8 @@ import type { BinaryTarget } from "./binaryTarget.js";
 import { jsonValueSchema, type JsonValue } from "./jsonValue.js";
 
 const digestSchema = z.string().regex(/^[a-f0-9]{64}$/u);
-const providerSchema = z.object({
+/** Provider identity schema shared by evidence-bearing persistence formats. */
+export const providerSchema = z.object({
   id: z.string().min(1),
   name: z.string().min(1),
   version: z.string().nullable(),
@@ -40,7 +41,8 @@ const subjectSchema = z.object({
   local_path: z.string(),
 });
 /** Source location attached to an evidence observation. */
-const evidenceLocationSchema = z.discriminatedUnion("kind", [
+/** Source-location schema shared by evidence-bearing persistence formats. */
+export const evidenceLocationSchema = z.discriminatedUnion("kind", [
   z.object({ kind: z.literal("address"), address: z.string().min(1) }),
   z.object({
     kind: z.literal("address-range"),
diff --git a/src/domain/evidenceBundle.ts b/src/domain/evidenceBundle.ts
index b278fe5ec..0f0a29c38 100644
--- a/src/domain/evidenceBundle.ts
+++ b/src/domain/evidenceBundle.ts
@@ -104,6 +104,56 @@ export const createEvidenceBundle = (
   };
 };
 
+/** Restrict a bundle to records and complete unknown histories for one artifact. */
+export const evidenceBundleForTarget = (
+  bundle: EvidenceBundle,
+  sha256: string,
+): EvidenceBundle => {
+  const recordsById = new Map(
+    bundle.records.map((record) => [record.evidence_id, record]),
+  );
+  let unknowns = bundle.unknowns.filter(
+    ({ scope_digest: scopeDigest }) => scopeDigest === sha256,
+  );
+  let changed = true;
+  while (changed) {
+    const ids = new Set(unknowns.map(({ unknown_id: id }) => id));
+    const retained = unknowns.filter(
+      (unknown) =>
+        unknown.relationships.every(({ unknown_id: id }) => ids.has(id)) &&
+        referencedEvidenceIds(unknown).every((id) => {
+          const record = recordsById.get(id);
+          return (
+            record?.subject?.digest.sha256 === sha256 ||
+            (unknown.mutation_evidence_ids.includes(id) &&
+              record?.subject === null &&
+              record.predicate_type === "rea.residual-unknown-mutation/v1")
+          );
+        }),
+    );
+    changed = retained.length !== unknowns.length;
+    unknowns = retained;
+  }
+  const mutationIds = new Set(
+    unknowns.flatMap(({ mutation_evidence_ids: ids }) => ids),
+  );
+  return createEvidenceBundle(
+    bundle.records.filter(
+      (record) =>
+        record.subject?.digest.sha256 === sha256 ||
+        mutationIds.has(record.evidence_id),
+    ),
+    unknowns,
+  );
+};
+
+const referencedEvidenceIds = (unknown: ResidualUnknown): readonly string[] => [
+  ...unknown.supporting_evidence_ids,
+  ...unknown.contradicting_evidence_ids,
+  ...unknown.mutation_evidence_ids,
+  ...(unknown.resolution?.evidence_ids ?? []),
+];
+
 /** Parse records, verify semantic IDs, and reject inconsistent manifests. */
 export const parseEvidenceBundle = (input: unknown): EvidenceBundle => {
   const parsed = evidenceBundleSchema.parse(input);
diff --git a/src/hopper/BridgeLauncher.ts b/src/hopper/BridgeLauncher.ts
index 7ad63b796..1bc927e71 100644
--- a/src/hopper/BridgeLauncher.ts
+++ b/src/hopper/BridgeLauncher.ts
@@ -72,6 +72,7 @@ export class HopperApplicationLauncher implements BridgeLauncher {
       `REA_SOCKET = ${JSON.stringify(session.socketPath)}`,
       `REA_TOKEN = ${JSON.stringify(session.token)}`,
       `REA_RUN_ID = ${JSON.stringify(session.runId)}`,
+      `REA_TARGET_PATH = ${JSON.stringify(this.options.targetPath)}`,
       `exec(compile(open(${JSON.stringify(this.options.bridgeScriptPath)}, 'rb').read(), ${JSON.stringify(this.options.bridgeScriptPath)}, 'exec'))`,
       "",
     ].join("\n");
diff --git a/src/hopper/HopperClient.ts b/src/hopper/HopperClient.ts
index 04aa73ec7..5f81b457f 100644
--- a/src/hopper/HopperClient.ts
+++ b/src/hopper/HopperClient.ts
@@ -19,6 +19,7 @@ import { silentLogger, type Logger } from "../logger.js";
 import { parseResponseLine, responseResult } from "./protocol.js";
 
 const MAX_LINE_BYTES = 10 * 1024 * 1024;
+const SHUTDOWN_TIMEOUT_MS = 30_000;
 const SESSION_ROOT = process.platform === "darwin" ? "/tmp" : tmpdir();
 
 /** Dependencies, deadlines, and redacted diagnostics for one bridge client. */
@@ -164,9 +165,16 @@ export class HopperClient {
     try {
       const socket = this.#socket;
       if (socket !== undefined && !socket.destroyed) {
-        await this.#request("shutdown", {}, { timeoutMs: 500 }).catch(() =>
-          err(new HopperProcessError(null)),
-        );
+        const shutdown = await this.#request(
+          "shutdown",
+          {},
+          { timeoutMs: SHUTDOWN_TIMEOUT_MS },
+        ).catch(() => err(new HopperProcessError(null)));
+        if (!shutdown.ok || !isShutdownAcknowledgement(shutdown.value))
+          this.#logger.warn(
+            { status: shutdown.ok ? "invalid-acknowledgement" : "failed" },
+            "Hopper document shutdown was not confirmed",
+          );
       }
       this.#failAll(new HopperProcessError(null));
       socket?.destroy();
@@ -395,6 +403,14 @@ const connectOnce = async (
     });
   });
 
+const isShutdownAcknowledgement = (value: JsonValue): boolean =>
+  typeof value === "object" &&
+  value !== null &&
+  !Array.isArray(value) &&
+  value.shutdown === true &&
+  value.analysis_stopped === true &&
+  value.document_closed === true;
+
 const parseServerInfo = (
   value: JsonValue,
   expectedRunId: string,
diff --git a/src/main.ts b/src/main.ts
index 8794250b6..f253c3a7f 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -88,6 +88,7 @@ export const run = async (
           logger,
           processPolicy: config.value.processExecutionPolicy,
           evidenceFilePolicy: config.value.evidenceFilePolicy,
+          analysisSnapshotFilePolicy: config.value.analysisSnapshotFilePolicy,
         }),
       {
         onerror: () => {
diff --git a/src/server/createServer.ts b/src/server/createServer.ts
index b1020dbd2..84e3d6e38 100644
--- a/src/server/createServer.ts
+++ b/src/server/createServer.ts
@@ -16,6 +16,7 @@ export interface CreateServerOptions {
   readonly logger?: Logger;
   readonly processPolicy?: ProcessExecutionPolicy;
   readonly evidenceFilePolicy?: EvidenceFilePolicy;
+  readonly analysisSnapshotFilePolicy?: EvidenceFilePolicy;
 }
 
 /**
diff --git a/src/server/registerSessionStatusTool.ts b/src/server/registerSessionStatusTool.ts
new file mode 100644
index 000000000..fc4c4f763
--- /dev/null
+++ b/src/server/registerSessionStatusTool.ts
@@ -0,0 +1,23 @@
+import type { McpServer } from "@modelcontextprotocol/server";
+
+import type { BinarySessionPort } from "../application/BinarySession.js";
+import { SESSION_TOOL_CONTRACTS } from "../contracts/toolContracts.js";
+import { toCallToolResult } from "./toolResult.js";
+
+/** Register the read-only provider and target status operation. */
+export const registerSessionStatusTool = (
+  server: McpServer,
+  session: BinarySessionPort,
+  contract: (typeof SESSION_TOOL_CONTRACTS)[2],
+): void => {
+  server.registerTool(
+    contract.name,
+    {
+      description: contract.description,
+      inputSchema: contract.inputSchema,
+      outputSchema: contract.outputSchema,
+      annotations: contract.annotations,
+    },
+    () => toCallToolResult({ ok: true, value: session.status() }, contract),
+  );
+};
diff --git a/src/server/registerSessionTools.ts b/src/server/registerSessionTools.ts
index e11d2df02..edfcbb568 100644
--- a/src/server/registerSessionTools.ts
+++ b/src/server/registerSessionTools.ts
@@ -15,6 +15,7 @@ import type {
 import { processScenarioSchema } from "../domain/processCapture.js";
 import { captureProcessScenario } from "../application/ProcessHarness.js";
 import type { Evidence } from "../domain/evidence.js";
+import type { AnalysisSnapshot } from "../domain/analysisSnapshot.js";
 import {
   recordUnknownInputSchema,
   updateUnknownInputSchema,
@@ -24,6 +25,10 @@ import {
   readEvidenceBundle,
   writeEvidenceBundle,
 } from "../application/EvidenceBundleFiles.js";
+import {
+  readAnalysisSnapshot,
+  writeAnalysisSnapshot,
+} from "../application/AnalysisSnapshotFiles.js";
 import { UnknownRegistryError, type AnalysisError } from "../domain/errors.js";
 import {
   DENY_EVIDENCE_FILE_POLICY,
@@ -35,6 +40,11 @@ import { registerArtifactComparisonTool } from "./registerArtifactComparisonTool
 import { registerFunctionComparisonTool } from "./registerFunctionComparisonTool.js";
 import { registerBundleComparisonTool } from "./registerBundleComparisonTool.js";
 import { registerInvestigationTools } from "./registerInvestigationTools.js";
+import {
+  closeBinaryInputSchema,
+  openBinaryInputSchema,
+} from "../contracts/sessionLifecycleInputs.js";
+import { registerSessionStatusTool } from "./registerSessionStatusTool.js";
 
 const recordProcessResidualUnknowns = (
   session: BinarySessionPort,
@@ -305,16 +315,25 @@ const registerUnknownTools = ({
   );
 };
 
-const registerLifecycleTools = (
-  server: McpServer,
-  session: BinarySessionPort,
-  logger: Logger,
-  contracts: readonly [
+interface LifecycleToolRegistration {
+  readonly server: McpServer;
+  readonly session: BinarySessionPort;
+  readonly logger: Logger;
+  readonly contracts: readonly [
     (typeof SESSION_TOOL_CONTRACTS)[0],
     (typeof SESSION_TOOL_CONTRACTS)[1],
     (typeof SESSION_TOOL_CONTRACTS)[2],
-  ],
-): void => {
+  ];
+  readonly snapshotFilePolicy: EvidenceFilePolicy;
+}
+
+const registerLifecycleTools = ({
+  server,
+  session,
+  logger,
+  contracts,
+  snapshotFilePolicy,
+}: LifecycleToolRegistration): void => {
   const [openContract, closeContract, statusContract] = contracts;
   server.registerTool(
     openContract.name,
@@ -325,9 +344,21 @@ const registerLifecycleTools = (
       annotations: openContract.annotations,
     },
     async (input, context) => {
-      const parsed = z.object({ path: z.string().min(1) }).parse(input);
+      const parsed = openBinaryInputSchema.parse(input);
+      let snapshot: AnalysisSnapshot | undefined;
+      if (parsed.snapshot_path !== undefined) {
+        const loaded = await readAnalysisSnapshot(
+          parsed.snapshot_path,
+          snapshotFilePolicy,
+        );
+        if (!loaded.ok) return toCallToolResult(loaded, openContract);
+        snapshot = loaded.value;
+      }
       const opened = await logToolExecution(logger, openContract.name, () =>
-        session.open(parsed.path, { signal: context.mcpReq.signal }),
+        session.open(parsed.path, {
+          signal: context.mcpReq.signal,
+          ...(snapshot === undefined ? {} : { snapshot }),
+        }),
       );
       return opened.ok
         ? toCallToolResult(
@@ -355,31 +386,48 @@ const registerLifecycleTools = (
       outputSchema: closeContract.outputSchema,
       annotations: closeContract.annotations,
     },
-    async () =>
-      toCallToolResult(
+    async (input) => {
+      const parsed = closeBinaryInputSchema.parse(input);
+      if (parsed.snapshot_path !== undefined) {
+        const snapshot = session.exportAnalysisSnapshot();
+        if (!snapshot.ok) return toCallToolResult(snapshot, closeContract);
+        const written = await writeAnalysisSnapshot(
+          snapshot.value,
+          parsed.snapshot_path,
+          parsed.overwrite,
+          snapshotFilePolicy,
+        );
+        if (!written.ok) return toCallToolResult(written, closeContract);
+        const closed = await logToolExecution(logger, closeContract.name, () =>
+          session.close(),
+        );
+        return closed.ok
+          ? toCallToolResult(
+              ok({
+                path: written.value.path,
+                bytes: written.value.bytes,
+                entries: snapshot.value.entries.length,
+              }),
+              closeContract,
+            )
+          : toCallToolResult(closed, closeContract);
+      }
+      return toCallToolResult(
         await logToolExecution(logger, closeContract.name, () =>
           session.close(),
         ),
         closeContract,
-      ),
-  );
-  server.registerTool(
-    statusContract.name,
-    {
-      description: statusContract.description,
-      inputSchema: statusContract.inputSchema,
-      outputSchema: statusContract.outputSchema,
-      annotations: statusContract.annotations,
+      );
     },
-    () =>
-      toCallToolResult({ ok: true, value: session.status() }, statusContract),
   );
+  registerSessionStatusTool(server, session, statusContract);
 };
 
 /** Register MCP-only target lifecycle operations on a long-lived session. */
 export interface SessionToolOptions {
   readonly processPolicy?: ProcessExecutionPolicy;
   readonly evidenceFilePolicy?: EvidenceFilePolicy;
+  readonly analysisSnapshotFilePolicy?: EvidenceFilePolicy;
 }
 
 export const registerSessionTools = (
@@ -391,6 +439,8 @@ export const registerSessionTools = (
   const processPolicy = options.processPolicy ?? DENY_PROCESS_POLICY;
   const evidenceFilePolicy =
     options.evidenceFilePolicy ?? DENY_EVIDENCE_FILE_POLICY;
+  const analysisSnapshotFilePolicy =
+    options.analysisSnapshotFilePolicy ?? DENY_EVIDENCE_FILE_POLICY;
   const [
     openContract,
     closeContract,
@@ -411,11 +461,13 @@ export const registerSessionTools = (
     updateUnknownContract,
     verifyUnknownContract,
   ] = SESSION_TOOL_CONTRACTS;
-  registerLifecycleTools(server, session, logger, [
-    openContract,
-    closeContract,
-    statusContract,
-  ]);
+  registerLifecycleTools({
+    server,
+    session,
+    logger,
+    contracts: [openContract, closeContract, statusContract],
+    snapshotFilePolicy: analysisSnapshotFilePolicy,
+  });
   registerEvidenceTools({
     server,
     session,
diff --git a/tests/analysisSnapshot.test.ts b/tests/analysisSnapshot.test.ts
new file mode 100644
index 000000000..50650b538
--- /dev/null
+++ b/tests/analysisSnapshot.test.ts
@@ -0,0 +1,127 @@
+import { mkdtemp, readFile, rm, stat, writeFile } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+
+import { afterEach, describe, expect, it } from "vitest";
+
+import {
+  readAnalysisSnapshot,
+  writeAnalysisSnapshot,
+} from "../src/application/AnalysisSnapshotFiles.js";
+import {
+  createAnalysisSnapshotEntry,
+  parseAnalysisSnapshot,
+  snapshotEvidenceForQuery,
+  type AnalysisSnapshot,
+} from "../src/domain/analysisSnapshot.js";
+import { createEvidenceBundle } from "../src/domain/evidenceBundle.js";
+import { createEvidence } from "../src/domain/evidence.js";
+import { createAnalysisExecution } from "../src/application/AnalysisProvider.js";
+
+let directory: string | undefined;
+
+afterEach(async () => {
+  if (directory !== undefined)
+    await rm(directory, { recursive: true, force: true });
+  directory = undefined;
+});
+
+describe("analysis snapshots", () => {
+  it("finds exact CLI evidence for provider-free replay", () => {
+    const target = {
+      path: "/tmp/app",
+      sha256: "b".repeat(64),
+      kind: "executable",
+      format: "mach-o",
+      architecture: "arm64",
+      loaderArgs: [],
+    } as const;
+    const evidence = createEvidence(
+      target,
+      { id: "fixture", name: "Fixture", version: "1" },
+      {
+        operation: "analyze_function",
+        parameters: { procedure: "main" },
+        result: { summary: "cached" },
+      },
+    );
+    const snapshot: AnalysisSnapshot = {
+      snapshot_version: 1,
+      target: {
+        sha256: target.sha256,
+        format: target.format,
+        architecture: target.architecture,
+        loader_args: [],
+      },
+      entries: [],
+      evidence_bundle: createEvidenceBundle([evidence]),
+    };
+    expect(
+      snapshotEvidenceForQuery(snapshot, {
+        target,
+        operation: "analyze_function",
+        parameters: {
+          procedure: "main",
+        },
+        provider: { id: "fixture", name: "Fixture", version: "1" },
+      }),
+    ).toEqual(evidence);
+    expect(
+      snapshotEvidenceForQuery(snapshot, {
+        target,
+        operation: "analyze_function",
+        parameters: {
+          procedure: "other",
+        },
+        provider: { id: "fixture", name: "Fixture", version: "1" },
+      }),
+    ).toBeUndefined();
+  });
+
+  it("writes canonical private JSON and rejects a changed query identity", async () => {
+    directory = await mkdtemp(join(tmpdir(), "rea-analysis-snapshot-"));
+    const path = join(directory, "analysis.json");
+    const target: AnalysisSnapshot["target"] = {
+      sha256: "a".repeat(64),
+      format: "mach-o",
+      architecture: "arm64",
+      loader_args: [],
+    };
+    const entry = createAnalysisSnapshotEntry(
+      target,
+      "address_name",
+      { address: "0x1000" },
+      createAnalysisExecution("main", {
+        id: "fixture",
+        name: "Fixture analysis provider",
+        version: "1",
+      }),
+    );
+    const snapshot: AnalysisSnapshot = {
+      snapshot_version: 1,
+      target,
+      entries: [entry],
+      evidence_bundle: createEvidenceBundle([]),
+    };
+    const policy = {
+      roots: [directory],
+      maxBytes: 1024 * 1024,
+      maxDepth: 64,
+      maxStringLength: 1024,
+      maxNodes: 10_000,
+    };
+    const written = await writeAnalysisSnapshot(snapshot, path, false, policy);
+    expect(written.ok).toBe(true);
+    expect((await readFile(path, "utf8")).endsWith("\n")).toBe(true);
+    expect((await stat(path)).mode & 0o777).toBe(0o600);
+    expect((await readAnalysisSnapshot(path, policy)).ok).toBe(true);
+
+    const altered = JSON.parse(await readFile(path, "utf8"));
+    altered.entries[0].parameters.address = "0x2000";
+    await writeFile(path, JSON.stringify(altered));
+    const loaded = await readAnalysisSnapshot(path, policy);
+    expect(loaded.ok).toBe(false);
+    if (!loaded.ok) expect(loaded.error._tag).toBe("EvidenceIntegrityError");
+    expect(() => parseAnalysisSnapshot(altered)).toThrow(/identifier/u);
+  });
+});
diff --git a/tests/binarySession.test.ts b/tests/binarySession.test.ts
index b5407eae9..9c2075abf 100644
--- a/tests/binarySession.test.ts
+++ b/tests/binarySession.test.ts
@@ -5,7 +5,10 @@ import { afterEach, describe, expect, it } from "vitest";
 
 import { BinarySession } from "../src/application/BinarySession.js";
 import type { AnalysisClient } from "../src/application/AnalysisProvider.js";
-import type { AnalysisProvider } from "../src/application/AnalysisProvider.js";
+import type {
+  AnalysisProvider,
+  CapabilityDescriptor,
+} from "../src/application/AnalysisProvider.js";
 import { HopperStartError } from "../src/domain/errors.js";
 import { err } from "../src/domain/result.js";
 import { observed as ok } from "./fixtures/analysisExecution.js";
@@ -96,6 +99,97 @@ describe("binary session", () => {
     await session.close();
   });
 
+  it("replays exact immutable calls from a matching provider-neutral snapshot", async () => {
+    const [first, second] = await targets();
+    const initialCalls: string[] = [];
+    const initial = new BinarySession(cacheProvider(initialCalls));
+    expect((await initial.open(first)).ok).toBe(true);
+    expect(
+      (
+        await initial.execute("address_name", {
+          address: "0x1000",
+          document: "first",
+        })
+      ).ok,
+    ).toBe(true);
+    const snapshot = initial.exportAnalysisSnapshot();
+    expect(snapshot.ok).toBe(true);
+    if (!snapshot.ok) return;
+    expect(snapshot.value.entries).toHaveLength(1);
+    await initial.close();
+
+    const replayCalls: string[] = [];
+    const replay = new BinarySession(cacheProvider(replayCalls));
+    expect(replay.importAnalysisSnapshot(snapshot.value)).toEqual({
+      ok: true,
+      value: 1,
+    });
+    expect((await replay.open(first)).ok).toBe(true);
+    const cached = await replay.execute("address_name", {
+      address: "0x1000",
+      document: "first",
+    });
+    expect(cached.ok).toBe(true);
+    if (cached.ok)
+      expect(cached.value.limitations).toContainEqual(
+        expect.stringContaining("local REA analysis snapshot"),
+      );
+    expect(
+      (
+        await replay.execute("set_address_name", {
+          address: "0x1000",
+          name: "renamed",
+          document: "first",
+        })
+      ).ok,
+    ).toBe(true);
+    expect(
+      (
+        await replay.execute("address_name", {
+          address: "0x1000",
+          document: "first",
+        })
+      ).ok,
+    ).toBe(true);
+    expect(replayCalls).toEqual(["health", "set_address_name", "address_name"]);
+    expect(replay.exportAnalysisSnapshot().ok).toBe(false);
+    await replay.close();
+
+    const mismatch = new BinarySession(cacheProvider([]));
+    expect(mismatch.importAnalysisSnapshot(snapshot.value).ok).toBe(true);
+    const opened = await mismatch.open(second);
+    expect(opened.ok).toBe(false);
+    if (!opened.ok) expect(opened.error._tag).toBe("EvidenceIntegrityError");
+    await mismatch.close();
+  });
+
+  it("does not snapshot reads that depend on the provider cursor", async () => {
+    const [first] = await targets();
+    const calls: string[] = [];
+    const session = new BinarySession(cacheProvider(calls));
+    expect((await session.open(first)).ok).toBe(true);
+    expect((await session.execute("address_name", {})).ok).toBe(true);
+    expect((await session.execute("address_name", {})).ok).toBe(true);
+    expect(calls).toEqual(["health", "address_name", "address_name"]);
+    expect(session.exportAnalysisSnapshot()).toMatchObject({
+      ok: true,
+      value: { entries: [] },
+    });
+    await session.close();
+  });
+
+  it("does not replay operations with filesystem side effects", async () => {
+    const [first] = await targets();
+    const calls: string[] = [];
+    const session = new BinarySession(cacheProvider(calls, true));
+    expect((await session.open(first)).ok).toBe(true);
+    const input = { address: "0x1000", document: "first" };
+    expect((await session.execute("address_name", input)).ok).toBe(true);
+    expect((await session.execute("address_name", input)).ok).toBe(true);
+    expect(calls).toEqual(["health", "address_name", "address_name"]);
+    await session.close();
+  });
+
   it("returns typed unavailability without dispatching a partial provider", async () => {
     const [first] = await targets();
     const operations: string[] = [];
@@ -306,6 +400,62 @@ const client = (fail = false): AnalysisClient => ({
   close: () => Promise.resolve(),
 });
 
+const cacheProvider = (
+  calls: string[],
+  mayWriteFilesystem = false,
+): AnalysisProvider => {
+  const identity = {
+    id: "fixture",
+    name: "Fixture analysis provider",
+    version: "1",
+  } as const;
+  return {
+    identity: () => identity,
+    capabilities: () => [
+      cacheCapability(identity, "address_name", false, mayWriteFilesystem),
+      cacheCapability(identity, "set_address_name", true),
+    ],
+    createClient: () => ({
+      execute: (operation) => {
+        calls.push(operation);
+        return Promise.resolve(ok(operation));
+      },
+      close: () => Promise.resolve(),
+    }),
+  };
+};
+
+const cacheCapability = (
+  provider: CapabilityDescriptor["provider"],
+  operation: "address_name" | "set_address_name",
+  mutatesArtifact: boolean,
+  mayWriteFilesystem = false,
+): CapabilityDescriptor => ({
+  provider,
+  operation,
+  inputContractVersion: 1,
+  outputContractVersion: 1,
+  available: true,
+  reason: null,
+  pagination: "none",
+  exhaustive: true,
+  effects: {
+    mutatesArtifact,
+    launchesProcess: false,
+    mayShowUi: false,
+    mayAccessNetwork: false,
+    mayWriteFilesystem,
+    changesPermissions: false,
+    requiresRoot: false,
+  },
+  limits: {
+    maxResults: null,
+    maxPayloadBytes: null,
+    timeoutMs: null,
+  },
+  limitations: [],
+});
+
 class TestClient implements AnalysisClient {
   closed = 0;
   constructor(
diff --git a/tests/bridgeTruthfulness.test.ts b/tests/bridgeTruthfulness.test.ts
index 29df93b85..3b16d0c27 100644
--- a/tests/bridgeTruthfulness.test.ts
+++ b/tests/bridgeTruthfulness.test.ts
@@ -96,4 +96,33 @@ describe("Hopper bridge truthfulness", () => {
     expect(bridgeSource).toContain('"type": _diagnostic_type(error)');
     expect(bridgeSource).not.toContain("traceback.format_exc");
   });
+
+  it("stops background analysis and closes the session-owned document", () => {
+    expect(bridgeSource).toContain("def _session_document():");
+    expect(bridgeSource).toContain("os.path.realpath(REA_TARGET_PATH)");
+    expect(bridgeSource).toContain("document.getExecutableFilePath()");
+    expect(bridgeSource).toContain("document.getDatabaseFilePath()");
+    expect(bridgeSource).toContain("document.backgroundProcessActive()");
+    expect(bridgeSource).toContain("document.requestBackgroundProcessStop()");
+    expect(bridgeSource).toContain("document.waitForBackgroundProcessToEnd()");
+    expect(bridgeSource).toContain("document.closeDocument()");
+    expect(bridgeSource).toContain(
+      "document_closed = _session_document() is None",
+    );
+  });
+
+  it("returns deterministic addresses for direct procedure relationships", () => {
+    expect(bridgeSource).toContain(
+      "_hex(item.getEntryPoint()) for item in procedure.getAllCallerProcedures()",
+    );
+    expect(bridgeSource).toContain(
+      "_hex(item.getEntryPoint()) for item in procedure.getAllCalleeProcedures()",
+    );
+    expect(bridgeSource).not.toContain(
+      "_procedure_name(item) for item in procedure.getAllCallerProcedures()",
+    );
+    expect(bridgeSource).not.toContain(
+      "_procedure_name(item) for item in procedure.getAllCalleeProcedures()",
+    );
+  });
 });
diff --git a/tests/config.test.ts b/tests/config.test.ts
index 4c2322e7a..13a3e05e3 100644
--- a/tests/config.test.ts
+++ b/tests/config.test.ts
@@ -62,6 +62,13 @@ describe("runtime configuration", () => {
           maxStringLength: 1024 * 1024,
           maxNodes: 1_000_000,
         },
+        analysisSnapshotFilePolicy: {
+          roots: [],
+          maxBytes: 64 * 1024 * 1024,
+          maxDepth: 64,
+          maxStringLength: 1024 * 1024,
+          maxNodes: 1_000_000,
+        },
         referenceSourcePolicy: {
           roots: [],
           secretPatterns: [],
diff --git a/tests/fixtures/fakeHopper.mjs b/tests/fixtures/fakeHopper.mjs
index e5262d665..a756fa29a 100644
--- a/tests/fixtures/fakeHopper.mjs
+++ b/tests/fixtures/fakeHopper.mjs
@@ -126,7 +126,14 @@ const server = createServer((socket) => {
           true,
         );
       } else if (request.method === "shutdown") {
-        send({ id: request.id, result: { shutdown: true } });
+        send({
+          id: request.id,
+          result: {
+            shutdown: true,
+            analysis_stopped: true,
+            document_closed: true,
+          },
+        });
         setTimeout(() => server.close(), 2);
       } else if (request.method === "hang") {
         // Deliberately leave the request pending.
diff --git a/tests/integration/configIntegration.test.ts b/tests/integration/configIntegration.test.ts
index 948d034fa..45cdc4ba1 100644
--- a/tests/integration/configIntegration.test.ts
+++ b/tests/integration/configIntegration.test.ts
@@ -23,6 +23,7 @@ describe("configuration parsing integration", () => {
       HOPPER_TARGET_KIND: "executable",
       HOPPER_LOADER_ARGS_JSON: '["-l","Mach-O","--aarch64"]',
       REA_EVIDENCE_ROOTS_JSON: '["/tmp/evidence"]',
+      REA_ANALYSIS_SNAPSHOT_ROOTS_JSON: '["/tmp/analysis"]',
     });
     expect(result.ok).toBe(true);
     if (!result.ok) throw new Error("unreachable");
@@ -34,6 +35,9 @@ describe("configuration parsing integration", () => {
       "--aarch64",
     ]);
     expect(result.value.evidenceFilePolicy.roots).toEqual(["/tmp/evidence"]);
+    expect(result.value.analysisSnapshotFilePolicy.roots).toEqual([
+      "/tmp/analysis",
+    ]);
   });
 
   it("rejects target kind values outside the enum", () => {
diff --git a/tests/sessionMcp.test.ts b/tests/sessionMcp.test.ts
index 5780a0dc0..ece3a8239 100644
--- a/tests/sessionMcp.test.ts
+++ b/tests/sessionMcp.test.ts
@@ -1,4 +1,4 @@
-import { mkdtemp, rm, writeFile } from "node:fs/promises";
+import { mkdtemp, readFile, rm, writeFile } from "node:fs/promises";
 import { tmpdir } from "node:os";
 import { dirname, join } from "node:path";
 import { fileURLToPath } from "node:url";
@@ -45,6 +45,13 @@ describe("target-free MCP lifecycle", () => {
         maxStringLength: 1024,
         maxNodes: 10_000,
       },
+      analysisSnapshotFilePolicy: {
+        roots: [directory],
+        maxBytes: 1024 * 1024,
+        maxDepth: 68,
+        maxStringLength: 1024,
+        maxNodes: 10_000,
+      },
     });
     const mcp = new Client({ name: "session-test", version: "1.0.0" });
     const [clientTransport, serverTransport] =
@@ -180,10 +187,42 @@ describe("target-free MCP lifecycle", () => {
     expect(
       text(await mcp.callTool({ name: "binary_session", arguments: {} })),
     ).toContain("second.hop");
-    await mcp.callTool({ name: "close_binary", arguments: {} });
+    const snapshotPath = join(directory, "analysis.json");
+    expect(
+      structured(
+        await mcp.callTool({
+          name: "close_binary",
+          arguments: { snapshot_path: snapshotPath },
+        }),
+      ).result,
+    ).toMatchObject({ path: snapshotPath, entries: 0 });
+    expect(JSON.parse(await readFile(snapshotPath, "utf8"))).toMatchObject({
+      evidence_bundle: { records: [], unknowns: [] },
+    });
     expect(
       text(await mcp.callTool({ name: "binary_session", arguments: {} })),
     ).toContain('"open": false');
+    expect(
+      (
+        await mcp.callTool({
+          name: "open_binary",
+          arguments: { path: first, snapshot_path: snapshotPath },
+        })
+      ).isError,
+    ).toBe(true);
+    expect(
+      structured(await mcp.callTool({ name: "list_unknowns", arguments: {} }))
+        .result,
+    ).toEqual([]);
+    expect(
+      (
+        await mcp.callTool({
+          name: "open_binary",
+          arguments: { path: second, snapshot_path: snapshotPath },
+        })
+      ).isError,
+    ).not.toBe(true);
+    await mcp.callTool({ name: "close_binary", arguments: {} });
   }, 10_000);
 
   it("records approved process residuals in the unknown registry", async () => {