claude-code - 💡(How to fix) Fix /ultrareview crashes deterministically on large PR (108 files / 9400 lines)

Environment

• Claude Code CLI
• Max $200 plan
• macOS Darwin 25.3.0

What happened

Ran `/ultrareview 15` twice against the same PR (https://github.com/DonaldMurillo/gofastr/pull/15). Both runs returned identical failure with no findings:

``` {"error":"Review crashed before producing findings. See session logs for details."} ```

Both runs deducted from the 3-run free tier. So far: 2 of 3 burned with zero output.

Session URLs

1. https://claude.ai/code/session_01UDDtuEb3TWhNjjJk4URUCj
2. https://claude.ai/code/session_01J7DL21XRHT4rpiExLwCnGR

PR under review

https://github.com/DonaldMurillo/gofastr/pull/15

• 108 files changed
• ~9,400 line additions
• 5 commits, all clean per local `scripts/test-all.sh`
• Repository is public

Hypothesis

Repeat crash with identical error string suggests a deterministic ceiling (payload size or analysis timeout) rather than a transient failure. PR is on the large side; smaller PRs in the same repo have run ultrareview successfully in the past.

Expected

Either: review completes with findings (preferred), OR the launch is rejected up-front with a clear "PR exceeds size limit" message AND the run is not deducted from the free tier.

Actual

Run starts, crashes silently mid-analysis, charges the credit, leaves only "see session logs" — which the user cannot access from CLI.

Suggested fixes

1. Pre-flight size check that refuses to start (or warns + asks for confirm) above whatever limit triggers the crash.
2. Don't deduct credits for runs that crash before producing any findings.
3. Surface a slice of the session log in the CLI error so users can self-triage.

Reproducer

Open any PR in the 100+ file / ~10k line range against a public repo, then `/ultrareview <PR#>`.