Summary

• Adds a fast-check property suite for lib/health.ts — the pure shape-transformation behind codex-multi-auth health reporting (AUDIT-M08/D-04 documents it as deliberately decoupled from the manager, which makes it an exact-oracle target).

What Changed

New test/property/health.property.test.ts (3 properties over getAccountHealth/formatHealthReport, circuit registry cleared per iteration since getAccountHealth reads the module-level breakers):

1. Classification oracle — for any pool (0–8 accounts; timestamps straddling now so both sides of the rate-limit/cooldown comparisons generate; undefined exercising the ?? 0 fallbacks; health 0–100), every per-account flag, all three counts, and the status partition derive exactly from the documented rule: healthy ⇔ not rate-limited ∧ not cooling ∧ health >= 50 ∧ circuit closed. The status edges are pinned too — an empty pool reads healthy, zero healthy of some reads unhealthy, anything between reads degraded.
2. Circuit integration — tripping the documented account:<index> fallback breaker (3 failures) for any subset of identity-less accounts shows up in circuitState, disqualifies otherwise-perfect accounts from healthyAccountCount, and drives the status partition.
3. Report shape — formatHealthReport names every account (email or the Account N fallback) with its health percentage and exactly the flags its classification implies, and the Rate Limited:/Cooling Down: summary lines appear iff their counts are nonzero.

No SUT bugs found.

Validation

• npm test -- test/property/health.property.test.ts test/health.test.ts — 17/17 (new 3 + existing 14 untouched)
• npm run typecheck (also via pre-commit hook)
• npx eslint test/property/health.property.test.ts --max-warnings=0
• Module-state hygiene: clearCircuitBreakers() in before/afterEach and at each property iteration start

Docs and Governance Checklist

• Test-only; no behavior or docs surface changed

Risk and Rollback

• Risk level: minimal — additive test file; conventions match the existing test/property/ suites.
• Rollback plan: revert the single commit.

https://claude.ai/code/session_01XNtnkLbBiXZxfQQYLMpucB

Generated by Claude Code

note: greptile review for oc-chatgpt-multi-auth. cite files like lib/foo.ts:123. confirm regression tests + windows concurrency/token redaction coverage.

Greptile Summary

additive test-only pr adding test/property/health.property.test.ts, a 4-property fast-check suite for lib/health.ts's getAccountHealth and formatHealthReport. no sut code is touched.

• classification + counts oracle — property 1 derives every per-account flag, the three aggregate counts, and the status partition from first principles against the documented rule (healthy ⇔ not rate-limited ∧ not cooling ∧ health ≥ 50 ∧ circuit closed).
• circuit integration — property 2 now covers both open and half-open disqualification via vi.useFakeTimers() + canExecute() forcing the transition, closing the gap flagged in the prior review round.
• email aliasing + report shape — property 3 explicitly asserts shared-key propagation; property 4 checks the full formatted report including Rate Limited: / Cooling Down: summary lines. per-account line format for circuit-flagged accounts is not exercised in property 4 (see inline comment).

Confidence Score: 5/5

safe to merge — additive test file only, no sut or production code changes

the change is a single new test file with no modifications to lib/ or any other production code. module-state hygiene is handled correctly via clearCircuitBreakers() in before/afterEach and at each property iteration start. the half-open path, previously unexercised, is now covered with proper fake-timer discipline and a finally-block cleanup. the only gap is a minor coverage omission in property 4 (circuit flag per-account line format), which does not affect production correctness.

test/property/health.property.test.ts — the report-shape property could be strengthened to cover per-account lines that include circuit flags

Important Files Changed

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A[arbAccounts generator] --> P1[property 1: classification oracle]
    A --> P4[property 4: report shape]

    P2_arb[fc.integer count\nfc.uniqueArray trippedRaw\nfc.boolean probeHalfOpen] --> P2[property 2: circuit integration]

    P2 -->|probeHalfOpen=false| OPEN[circuits stay open\nexpectedState = 'open']
    P2 -->|probeHalfOpen=true & tripped>0| HALF[vi.setSystemTime + canExecute\nexpectedState = 'half-open']

    FC_BOOL[fc.boolean shareEmail] --> P3[property 3: email aliasing]

    P1 --> SUT1[getAccountHealth accounts NOW]
    P4 --> SUT1
    P2 --> SUT1
    P3 --> SUT1
    SUT1 --> SUT2[formatHealthReport]

    SUT1 --> ASSERT_COUNTS[assert counts + status partition]
    SUT2 --> ASSERT_REPORT[assert per-account lines + summary flags]
    P2 --> ASSERT_CIRCUIT[assert circuitState per account\nassert healthyAccountCount\nassert report.includes circuit-state]

Fix the following 1 code review issue. Work through them one at a time, proposing concise fixes.

---

### Issue 1 of 1
test/property/health.property.test.ts:197-233
**circuit flag line format never validated under property 4**

property 4 always calls `clearCircuitBreakers()` and uses a fresh registry, so `account.circuitState` is always `"closed"` for every generated account. the assertion `expect(line?.includes("circuit-")).toBe(false)` only ever exercises the false branch; the format of per-account lines when a circuit flag is present (e.g. `circuit-open` or `circuit-half-open`) is never checked here. property 2 validates that the string `circuit-${expectedTrippedState}` appears somewhere in the full report, but not that it is correctly embedded in the right account's detail line. a mutation that emits `circuit_${state}` or that attaches the flag to the wrong account row would escape property 4 entirely, and property 2's `report.includes(...)` check would only catch the prefix change. extending property 4 to occasionally trip a circuit for one account — or splitting the "with-circuit" case into a small companion property — would close the gap.

_{Reviews (2): Last reviewed commit: "test: exercise half-open disqualificatio..." | Re-trigger Greptile}