External processes like SSH passphrase prompts can write to the terminal between progress updates. The previous renderer used `ansi-diff`, which only overwrites the characters it knows changed, so leftover characters from the external output stayed visible on the progress line — e.g. `added 0sa':`, where `sa':` is a fragment of `Enter passphrase for key '.../.ssh/id_rsa':`.
Closes https://github.com/pnpm/pnpm/issues/12350
## Summary
The interactive (non-append-only) reporter now redraws the whole frame in place on each update instead of incrementally diffing it:
- return the cursor to the top-left of the previous frame (`ESC[<rows>A` followed by a carriage return, so the redraw starts at column 0 even if an external process left the cursor mid-line),
- erase from there to the end of the display (`ESC[0J`),
- reprint the frame — all in a single atomic write, so there is no flicker.
Because the whole region is erased on every frame, any characters an external process wrote in between are cleared. This matches pacquet's `Output::Frame` rendering (the column-reset hardening was applied to both stacks). The now-unused `ansi-diff` dependency has been removed.
---------
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: Zoltan Kochan <z@kochan.io>
- Adds a `pnpm-render` bin to `@pnpm/cli.default-reporter` that reads pnpm-shaped NDJSON from stdin and pipes it through the default reporter, so external tools that emit `pnpm:*` log records can reuse pnpm's renderer.
- Optional first positional arg sets the command name (defaults to `install`), e.g. `pnpm-render add` for piping output from `pacquet add`.
## Motivation
[Pacquet](https://github.com/pnpm/pacquet) emits pnpm-shaped `--reporter=ndjson` output for forward-compatibility with pnpm's renderer, but there was no way to actually render it. With this bin:
```sh
pacquet install --reporter=ndjson 2>&1 >/dev/null | pnpm-render
```
(pacquet writes NDJSON to stderr, so the redirect is needed.)
