fix(core): skip oversized ripgrep match lines instead of aborting grep

[C0d3N1nja97342]

Issue for this PR

Closes #35523

Type of change

• Bug fix

What does this PR do?

grep aborts the entire search with Ripgrep JSON record exceeded 65536 bytes whenever a single match sits on a line longer than ~64 KiB (minified bundles, base64, large data rows) — every other match in the same call is thrown away.

The guard is opencode's own, in packages/core/src/ripgrep.ts (the parse callback inside run, grep branch):

Buffer.byteLength(line, "utf8") > MAX_RECORD_BYTES  // 64 * 1024
  ? Effect.fail(failure(`Ripgrep JSON record exceeded ${MAX_RECORD_BYTES} bytes`))
  : JSON.parse(line)

ripgrep itself exits 0 and emits the record fine — the failure is purely opencode rejecting its own output. I confirmed with real rg 15.1.0 that --max-columns does not help here: in --json mode it leaves lines.text at the full length, and --max-columns-long drops the match entirely. So the fix belongs in the parse guard, not the rg args.

Change: when a record exceeds MAX_RECORD_BYTES, return undefined (skipped by the existing Stream.filter just downstream) instead of failing. The remaining matches are still returned. Truly invalid JSON at normal length still fails with the same error as before.

Why this is the right trade: the display path already truncates lines.text to 2000 chars (in Match.make further down in grep), so the full content of an oversized line was never surfaced to the model/user anyway. Skipping one unusable line is strictly better than discarding the whole result set.

(Note: a previous version of this PR targeted v2; reopened against dev, which is where 1.17.x ships and where GitHub links the issue correctly.)

How did you verify your code works?

Ran in an oven/bun:1.3.14 container with git installed (the existing "keeps ignored files out of catch-all find results" test shells out to git init), against the dev branch tip:

cd packages/core
bun test test/ripgrep.test.ts
bun run typecheck

• Added a regression test skips oversized match lines instead of failing the whole grep: writes big.txt (a 70000-byte line containing the pattern) and small.txt (a normal line), greps the pattern, asserts small.txt is returned, big.txt is skipped, and the call does not throw.
• Confirmed the regression test fails with the original Effect.fail and passes with the fix.
• All 3 tests in ripgrep.test.ts pass.
• bun run typecheck (tsgo --noEmit) in packages/core is clean.

Checklist

• I have tested my changes locally
• I have not included unrelated changes in this PR