[diffs/edit] Add edit prediction support by ije · Pull Request #1024 · pierrecomputer/pierre

ije · 2026-07-24T18:36:08Z

Screen.Recording.2026-07-25.at.02.18.26.mov

Usage:

import type {
  EditorOptions,
  EditPredictProvider,
  EditPredictResponse,
} from '@pierre/diffs/edit';
import { File } from '@pierre/diffs/react';

const provider: EditPredictProvider = {
  async predict(request, { signal }) {
    const response = await fetch('/api/edit-prediction', {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify(request),
      signal,
    });

    if (!response.ok) {
      throw new Error('Prediction failed');
    }

    return (await response.json()) as EditPredictResponse;
  },
};

const editorOptions: EditorOptions<undefined> = {
  editPrediction: {
    provider,
    mode: 'eager',
    include: ['**/*.ts', '**/*.tsx'],
    exclude: ['**/*.test.ts'],
  },
};

export function EditableFile() {
  return (
    <File
      file={{
        name: 'cart.ts',
        contents: 'const total = items.',
      }}
      edit
      editorOptions={editorOptions}
    />
  );
}

vercel · 2026-07-24T18:36:14Z

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Project	Deployment	Actions	Updated (UTC)
pierre-docs-diffs	Ready	Preview	Jul 27, 2026 12:28pm
pierre-docs-diffshub	Ready	Preview	Jul 27, 2026 12:28pm
pierre-docs-trees	Ready	Preview	Jul 27, 2026 12:28pm
pierrejs-diff-demo	Ready	Preview	Jul 27, 2026 12:28pm

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ije · 2026-07-24T18:43:47Z

still working on it

ije · 2026-07-27T08:40:22Z

@codex review

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chatgpt-codex-connector · 2026-07-27T08:45:15Z

+  if (!isGithubAuthenticated(request)) {
+    return createErrorResponse('GitHub sign-in required.', 401);


Rate-limit authenticated prediction requests

Any GitHub account that obtains this session cookie can issue unlimited concurrent POST requests, and every accepted request is forwarded using the site's shared Mistral API key. A caller can therefore exhaust the upstream quota or incur substantial usage before Mistral's account-wide 429 response intervenes; enforce a per-user/session and concurrency limit before calling Codestral.

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added vercel rate limit

chatgpt-codex-connector · 2026-07-27T08:45:15Z

+        prediction.response.edits[editIndex - 1]?.range.end.line !==
+          start.line &&
+        prediction.response.edits[editIndex + 1]?.range.start.line !==
+          start.line


Compose multiple same-line edits before previewing

When a valid response contains two non-overlapping insertions on the same source line, these neighbor checks suppress suffix reconstruction for both overlays, while the earlier #renderSelection calls mask the in-flow suffix from each insertion point. The preview consequently drops unchanged source text even though accepting the prediction preserves it; compose the edits into one post-edit line for rendering or reject same-line edit combinations.

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fixed in dae253f

chatgpt-codex-connector · 2026-07-27T08:45:15Z

        return;
      }
-      if (isPromise(result)) {
+      if (result instanceof Promise) {


Detect asynchronous storage results across realms

If a custom persistStateStorage returns a Promise created in another window or iframe, result instanceof Promise is false even though the value satisfies the public Promise return type. The restore path then treats that Promise as an EditorState and applies an empty state, while the analogous write check also stops tracking write ordering; retain a realm-independent thenable check or normalize with Promise.resolve.

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fixed in dae253f

ije · 2026-07-27T12:01:48Z

@codex review again

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chatgpt-codex-connector · 2026-07-27T12:07:09Z

+              // Cross-line edits cannot share their boundary line with another
+              // preview overlay.
+              if (renderEdits.at(-1)?.range.end.line === line) {
+                return;


Support valid edits that share a boundary line

When one non-overlapping edit crosses into a line and the next edit starts later on that same line—for example, {0,2}->{1,0} followed by {1,1}->{1,2}—the previous render edit ends on line, so this branch returns from the response handler. The public provider contract permits non-overlapping edit batches, but this valid response is silently discarded: no preview appears and Tab cannot accept it. Compose the boundary-line overlays or otherwise render the batch without rejecting it.

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fixed in 0b00db6

[diffs/edit] add inline edit prediction support

303ba7f

ije changed the title ~~[diffs/edit] add inline edit prediction support~~ [diffs/edit] Add edit prediction support Jul 24, 2026

chatgpt-codex-connector Bot reviewed Jul 24, 2026

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Comment thread apps/docs/app/(diffs)/edit/predict/route.ts

Comment thread packages/diffs/src/editor/editor.ts Outdated

Comment thread packages/diffs/src/editor/editor.ts

ije added 4 commits July 26, 2026 01:52

Update docs

f390ea0

Add GitHub OAuth support for edit prediction demo

b807461

Update docs

aa7de41

Fix inline suggestion overlap

1925ce2

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ije added 3 commits July 27, 2026 11:20

refactor

dd8a091

refactor

16d3657

typo

519747b

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Update docs

0a46408

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fix codex

dae253f

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fix codex

0b00db6

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		if (!isGithubAuthenticated(request)) {
		return createErrorResponse('GitHub sign-in required.', 401);

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ije commented Jul 24, 2026

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vercel Bot commented Jul 24, 2026 •

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