diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7e3cfd3..d3cb057 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## 0.8.1 - Unreleased
 
+- Preserved observed source edits in failed patch attempts when a provider writes files before exiting with an error.
+
 - Fixed nested-project repairs to ignore their own state and sibling changes, fingerprint project-relative source paths, and record both sides of renames.
 
 - Updated Zod and development tooling, aligned Node typings with the Node 22 floor, and added Node 22/24 runtime CI with pinned GitHub Actions.
diff --git a/docs/patching.md b/docs/patching.md
index bf5c849..706c1cf 100644
--- a/docs/patching.md
+++ b/docs/patching.md
@@ -20,6 +20,7 @@ Current behavior:
 - lets the provider edit the worktree during the explicit fix command
 - runs the configured formatter, feature-specific tests, typecheck, lint, and
   configured test command, with duplicates removed (see [Validation](validation.md))
+- records source edits even when the provider fails before validation
 - records command results
 - links the patch attempt to the finding
 
diff --git a/src/fix.ts b/src/fix.ts
index 316b501..340ff9a 100644
--- a/src/fix.ts
+++ b/src/fix.ts
@@ -86,9 +86,11 @@ export async function fixCommand(
     plan = await provider.fix(loaded.root, prompt, providerOptions(config));
   } catch (error: unknown) {
     const message = error instanceof Error ? error.message : String(error);
+    const afterChanged = await sourceChangedSnapshots(loaded.root, loaded.paths.stateDir);
     await writePatchAttempt(loaded.paths, {
       ...initialPatch,
       status: "failed",
+      filesChanged: changedPathsBetweenSnapshots(beforeChanged, afterChanged),
       plan: `${initialPatch.plan}\n\nProvider failed: ${message}`,
       provider: {
         name: provider.name,
diff --git a/src/workflow.test.ts b/src/workflow.test.ts
index 3dec4bc..98e0c4b 100644
--- a/src/workflow.test.ts
+++ b/src/workflow.test.ts
@@ -1,3 +1,4 @@
+import { providerByName } from "./provider.js";
 import { describe, expect, it, vi } from "vitest";
 import {
   access,
@@ -5195,4 +5196,29 @@ describe("workflow", () => {
     expect(findings[0]?.linkedPatchAttemptIds).toContain(patches[0]?.patchAttemptId);
     delete process.env["CLAWPATCH_PROVIDER"];
   });
+
+  it("records partial edits when a provider fails after writing source", async () => {
+    const root = await sinceFixture("clawpatch-partial-fix-");
+    const context = await makeContext({ ...testOptions(root), quiet: true });
+    await initCommand(context, {});
+    await mapCommand(context);
+    const reviewed = (await reviewCommand(context, { provider: "mock", limit: "1" })) as {
+      next: string;
+    };
+    const finding = reviewed.next.split(" ").at(-1)!;
+    vi.spyOn(providerByName("mock-fail"), "fix").mockImplementationOnce(async () => {
+      await writeFixture(root, "src/one.ts", "export const one = 42;\n");
+      await writeFixture(root, "src/partial.ts", "export const partial = true;\n");
+      throw new Error("failed after editing");
+    });
+    await expect(fixCommand(context, { finding, provider: "mock-fail" })).rejects.toThrow(
+      "failed after editing",
+    );
+    const patches = await readPatchAttempts(statePaths(join(root, ".clawpatch")));
+    expect(patches).toHaveLength(1);
+    expect(patches[0]).toMatchObject({
+      status: "failed",
+      filesChanged: ["src/one.ts", "src/partial.ts"],
+    });
+  });
 });