[BUG] rate_limits field still missing/null from statusLine JSON on 2.1.141 (OAuth Pro, firstParty)

Filing as a fresh report because the prior reports of this bug are closed and locked: #40094 (closed not_planned on 2026-05-01, locked by stale-bot) and #45133 (closed as duplicate of #40094). The bug is still live on 2.1.141 with newer evidence.

What's wrong

The rate_limits field is null (was previously absent on older builds — same effective bug) in the JSON piped to the statusLine command, even on an OAuth Pro plan with apiProvider: firstParty. Per the v2.1.80 changelog and the statusLine docs, it should populate after the first API response.

Captured live statusLine JSON (top-level relevant fields, redacted):

{
  "version": "2.1.141",
  "model": {"id": "claude-opus-4-7", "display_name": "Opus 4.7"},
  "rate_limits": null,
  "context_window": {"used_percentage": 13, "total_input_tokens": 128657}
}

total_input_tokens=128657 confirms many API calls have already happened in this session — this is not a pre-first-call empty state.

Auth

• authMethod: oauth_token, apiProvider: firstParty
• Plan: Claude Pro
• OAuth scopes: user:file_upload, user:inference, user:mcp_servers, user:profile, user:sessions:claude_code

Steps to reproduce

1. OAuth-authenticate on Pro/Max (claude login).
2. Configure a statusLine command that dumps stdin to a file.
3. Run any prompt to ensure API calls happen.
4. Inspect the dumped JSON: rate_limits is null (or absent on older builds).

Versions

• Claude Code: 2.1.141 (also reproduces on 2.1.142)
• OS: macOS (Darwin 25.4.0)

Why this matters

Without rate_limits, statusline scripts must fall back to /api/oauth/usage, which has aggressive per-token 429 rate limiting (~5 req before lockout). The native field was the intended escape hatch; with it gone, statuslines either show nothing or burn user OAuth quota polling.

Related

• #40094 (closed not_planned, locked) — prior report on 2.1.86
• #45133 (closed duplicate, locked) — same bug on 2.1.96
• #38335, #38350 — possibly correlated server-side rate-limit changes (per #40094 reporter)