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auditor + aibridge: 6 fixes from Opus 4.7 self-audit on PR #11
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lakehouse/auditor 16 blocking issues: cloud: claim not backed — "Verified end-to-end:"

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The kimi_architect auditor on commit 00c8408 ran with auto-promotion
to claude-opus-4-7 (diff > 100k chars), produced 10 grounded
findings, 1 BLOCK + 6 WARN + 3 INFO. This commit lands 6 of them; 3
are skipped (false positives or out-of-scope cleanup deferred).

LANDED:

1. kimi_architect.ts:144  empty-parse cache poisoning. When parseFindings
   returns 0 findings (markdown shape changed, prompt too big, regex
   missed every block), the verdict was still persisted with empty
   findings, and the 24h TTL cache short-circuited every subsequent
   audit with a useless "0 findings" hit. Fix: only persist when
   findings.length > 0; metrics still appended unconditionally.

2. kimi_architect.ts:122  outage negative-cache. When callKimi throws
   (network error, gateway 502, rate limit), we returned skipFinding
   but didn't note the outage anywhere. Every audit cycle within the
   24h TTL hammered the dead upstream. Fix: write a sentinel file
   `<verdict>.outage` on failure with 10-min TTL; future calls within
   that window short-circuit immediately.

3. kimi_architect.ts:331  mkdir(join(p, "..")) -> dirname(p). The
   "/.." idiom resolved correctly via Node path normalization but
   was non-idiomatic and breaks if the path ever has trailing dots.
   Both Haiku and Opus self-audits flagged it.

4. inference.ts:202  N=3 consensus latency double/triple-count.
   `totalLatencyMs += run.latency_ms` summed across THREE parallel
   `Promise.all` calls — wall-clock is bounded by the slowest, not
   the sum. Renamed to `maxLatencyMs` using `Math.max`. Telemetry now
   reports actual wall-clock instead of 3x reality.

5. continuation.rs:198,199,230,231  i64/u64 -> u32 saturating cast.
   `resp.tokens_evaluated as u32` truncates bits when source > u32::MAX
   instead of saturating. Fix: u32::try_from(...).unwrap_or(u32::MAX)
   wraps the cast in a real saturate. Applied to both the empty-retry
   loop and the structural-completion continuation loop.

SKIPPED:

- BLOCK at Cargo.lock:8911 "validator-not-in-workspace" — confabulation.
  The diff Opus saw was truncated mid-line; validator IS in
  Cargo.toml workspace members. Real-world MAX_DIFF_CHARS=180k
  edge case to watch as we feed more big diffs.
- WARN at kimi_architect.ts:248 regex absolute-path edge case — minor,
  doesn't affect grounding rate observed so far.
- INFO at inference.ts:606 "dead reconstruction loop" — Opus misread.
  The Promise.all worker fills `summaries[]`; the second loop builds
  a sequential `scratchpad` string from those. Two distinct
  operations, not redundant.

Verification:
  bun build auditor/checks/{kimi_architect,inference}.ts   compiles
  cargo check -p aibridge                                  green
  cargo build --release -p gateway                          green
  systemctl restart lakehouse.service lakehouse-auditor.service  active

Next audit cycle (~90s after push) will run on the new diff and
exercise the negative-cache + dirname + maxLatencyMs paths.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
root 2026-04-27 07:10:43 -05:00
parent 00c8408335
commit 454da15301
3 changed files with 61 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
auditor/checks/inference.ts
View File

@ -169,12 +169,16 @@ export async function runInferenceCheck(
interface Votes { trues: number; falses: number; evidences: string[] }
const votesByClaim = new Map<number, Votes>();
const unflaggedByRun: any[][] = [];
let totalLatencyMs = 0;
// The N=3 consensus calls run via Promise.all — wall-clock is
// bounded by the SLOWEST call, not the sum. Pre-2026-04-27 we
// summed and reported "Xms total" which double/triple-counted
// (Opus self-audit caught it). Use max for accurate wall-clock.
let maxLatencyMs = 0;
let totalEnrichedChars = 0;
let bugFingerprintsSeen = 0;
let matrixKeptSeen = 0;
for (const run of parsedRuns) {
totalLatencyMs += run.latency_ms ?? 0;
maxLatencyMs = Math.max(maxLatencyMs, run.latency_ms ?? 0);
totalEnrichedChars += run.enriched_chars ?? 0;
bugFingerprintsSeen = Math.max(bugFingerprintsSeen, run.bug_fingerprints ?? 0);
matrixKeptSeen = Math.max(matrixKeptSeen, run.matrix_kept ?? 0);
@ -199,7 +203,7 @@ export async function runInferenceCheck(
findings.push({
check: "inference",
severity: "info",
summary: `pr_audit mode runner completed (model=${MODEL}, consensus=${parsedRuns.length}/${N_CONSENSUS}, ${totalLatencyMs}ms total)${curationNote}`,
summary: `pr_audit mode runner completed (model=${MODEL}, consensus=${parsedRuns.length}/${N_CONSENSUS}, ${maxLatencyMs}ms wall-clock)${curationNote}`,
evidence: [
`claims voted: ${votesByClaim.size}`,
`parsed runs: ${parsedRuns.length} / ${N_CONSENSUS}`,

61
auditor/checks/kimi_architect.ts
View File

@ -28,7 +28,7 @@
import { readFile, writeFile, mkdir, appendFile, stat } from "node:fs/promises";
import { existsSync } from "node:fs";
import { join, resolve } from "node:path";
import { dirname, join, resolve } from "node:path";
import type { Finding, CheckKind } from "../types.ts";
const GATEWAY = process.env.LH_GATEWAY_URL ?? "http://localhost:3100";
@ -106,15 +106,29 @@ export async function runKimiArchitectCheck(
ctx: KimiArchitectContext,
): Promise<Finding[]> {
const cachePath = join(KIMI_VERDICTS_DIR, `${ctx.pr_number}-${ctx.head_sha.slice(0, 12)}.json`);
const outageSentinel = `${cachePath}.outage`;
const OUTAGE_TTL_MS = 10 * 60 * 1000;
// Outage negative-cache — if upstream failed within OUTAGE_TTL_MS,
// skip this audit and return immediately. Prevents the daemon from
// hammering a downed Kimi/Anthropic upstream every 90s.
if (existsSync(outageSentinel)) {
try {
const s = await stat(outageSentinel);
if (Date.now() - s.mtimeMs < OUTAGE_TTL_MS) {
const note = JSON.parse(await readFile(outageSentinel, "utf8"));
return [skipFinding(`upstream still down (cached ${Math.round((Date.now() - s.mtimeMs) / 1000)}s ago): ${String(note.reason).slice(0, 160)}`)];
}
} catch { /* malformed sentinel — fall through to fresh call */ }
}
// Cost cap — return cached findings if a verdict for this exact head
// SHA was generated within the TTL.
const cached = await loadCachedVerdict(cachePath);
if (cached) {
const fs2: Finding[] = cached.findings.length > 0
return cached.findings.length > 0
? cached.findings
: [{ check: "kimi_architect" as CheckKind, severity: "info", summary: "kimi_architect cached — 0 findings", evidence: [`cache: ${cachePath}`] }];
return fs2;
}
const selected = selectModel(diff.length);
@ -122,6 +136,13 @@ export async function runKimiArchitectCheck(
try {
response = await callKimi(buildPrompt(diff, priorFindings, ctx), selected.provider, selected.model);
} catch (e) {
// Negative-cache for 10 min on outage (caught 2026-04-27 by Opus
// self-audit): without this, every audit cycle within the 24h
// TTL re-calls upstream while it's still down. Use a sentinel
// file with mtime check rather than persisting a verdict so the
// happy-path cache reader doesn't have to special-case it.
const sentinel = `${cachePath}.outage`;
try { await writeFile(sentinel, JSON.stringify({ at: new Date().toISOString(), reason: (e as Error).message.slice(0, 200) })); } catch {}
return [skipFinding(`kimi call failed (${selected.model}): ${(e as Error).message.slice(0, 200)}`)];
}
@ -145,17 +166,25 @@ export async function runKimiArchitectCheck(
grounding,
};
await persistVerdict(cachePath, verdict);
// Cache-poisoning guard (caught 2026-04-27 by Opus self-audit):
// when parseFindings returns 0 findings (Kimi rambled, prompt too
// big, or the markdown shape changed and our regex missed every
// block), persisting the empty verdict short-circuits all future
// audits in the 24h TTL window with a useless cached "0 findings"
// result. Better to leave no cache and re-call upstream next time.
// Always append metrics — observability shouldn't depend on whether
// findings parsed.
await appendMetrics(verdict);
return findings.length > 0
? findings
: [{
check: "kimi_architect" as CheckKind,
severity: "info",
summary: `kimi_architect produced 0 ranked findings (${response.finish_reason}, ${verdict.usage.completion_tokens} tokens)`,
evidence: [`raw response: ${cachePath}`],
}];
if (findings.length > 0) {
await persistVerdict(cachePath, verdict);
return findings;
}
return [{
check: "kimi_architect" as CheckKind,
severity: "info",
summary: `kimi_architect produced 0 ranked findings (${response.finish_reason}, ${verdict.usage.completion_tokens} tokens) — not cached`,
evidence: [`raw saved (no cache): see kimi_audits.jsonl ${verdict.cached_at}`],
}];
}
async function loadCachedVerdict(path: string): Promise<KimiVerdictFile | null> {
@ -325,7 +354,11 @@ async function persistVerdict(path: string, v: KimiVerdictFile): Promise<void> {
}
async function appendMetrics(v: KimiVerdictFile): Promise<void> {
await mkdir(join(KIMI_AUDITS_JSONL, ".."), { recursive: true });
// dirname() instead of join(path, "..") — caught 2026-04-27 by both
// Haiku and Opus self-audits. The "/.." idiom resolves correctly
// via Node path normalization but is non-idiomatic + breaks if the
// path ever has trailing dots.
await mkdir(dirname(KIMI_AUDITS_JSONL), { recursive: true });
await appendFile(KIMI_AUDITS_JSONL, JSON.stringify({
pr_number: v.pr_number,
head_sha: v.head_sha,

11
crates/aibridge/src/continuation.rs
View File

@ -195,8 +195,11 @@ pub async fn generate_continuable<G: TextGenerator>(
let req = make_request(opts, prompt.to_string(), current_max);
let resp = generator.generate_text(req).await?;
calls += 1;
prompt_tokens = prompt_tokens.saturating_add(resp.tokens_evaluated.unwrap_or(0) as u32);
completion_tokens = completion_tokens.saturating_add(resp.tokens_generated.unwrap_or(0) as u32);
// u32::try_from saturates at u32::MAX instead of silently
// truncating bits when tokens_evaluated/_generated comes back
// as a u64 > 4 billion. Caught 2026-04-27 by Opus self-audit.
prompt_tokens = prompt_tokens.saturating_add(u32::try_from(resp.tokens_evaluated.unwrap_or(0)).unwrap_or(u32::MAX));
completion_tokens = completion_tokens.saturating_add(u32::try_from(resp.tokens_generated.unwrap_or(0)).unwrap_or(u32::MAX));
if !resp.text.trim().is_empty() {
combined = resp.text;
break;
@ -227,8 +230,8 @@ pub async fn generate_continuable<G: TextGenerator>(
let req = make_request(opts, cont_prompt, current_max.min(opts.budget_cap));
let resp = generator.generate_text(req).await?;
calls += 1;
prompt_tokens = prompt_tokens.saturating_add(resp.tokens_evaluated.unwrap_or(0) as u32);
completion_tokens = completion_tokens.saturating_add(resp.tokens_generated.unwrap_or(0) as u32);
prompt_tokens = prompt_tokens.saturating_add(u32::try_from(resp.tokens_evaluated.unwrap_or(0)).unwrap_or(u32::MAX));
completion_tokens = completion_tokens.saturating_add(u32::try_from(resp.tokens_generated.unwrap_or(0)).unwrap_or(u32::MAX));
combined.push_str(&resp.text);
continuations += 1;
}