A queue that accepts blog_article at score 3.09 five minutes after another revenue worker marked the same work class 0.0 and ineligible is not merely noisy. It is paying twice for the same decision and getting two incompatible answers. The visible symptom is a confusing enqueue event. The real cost is authority drift: one subsystem believes it is allowed to create work, another believes it is allowed to reject it, and neither can prove which verdict owns the lane.
That failure has a direct operating price. It burns model budget on tasks that may be structurally disallowed. It pushes low-confidence work into the pending queue where it competes with revenue-first work. It contaminates telemetry because the queue shows activity while the eligibility system says the activity should not exist. It damages post-run learning because a later failure cannot be classified cleanly as bad content, bad routing, stale scoring, or an obsolete policy snapshot.
The dangerous part is the five-minute gap. A longer gap could be explained by a legitimate policy change, a refreshed market signal, or a migration. Five minutes is short enough that the default assumption should be a split-brain scoring path. If autonomous_loop and revenue_worker can each compute eligibility independently, the queue is not a queue. It is a negotiation between stale copies of business logic.
The fix is not to tune the score threshold from 3.09 to a more pleasing number. The fix is to make scoring deterministic, single-owned, replayable, and reject-explicit. A work item may have many signals, but it must have one eligibility authority. Every enqueue must carry the decision record that made it legal, and every worker must refuse work whose decision record is missing, expired, or contradicted by the current authority.
The invariant is simple: no work item enters the durable queue unless the current scoring authority has emitted an eligible verdict for the exact item key, policy version, and scoring inputs used by the enqueue path. This is stricter than saying the score must be above a threshold. Thresholds are implementation details. The invariant names the boundary: enqueue is not allowed to score; enqueue is allowed to consume an authoritative decision.
The item key must be stable. A weak key like blog_article is not enough because it describes a class of work, not the candidate. A usable key should include the lane, topic or pain-point hash, recommended sprint slug, freshness window, and any routing dimension that changes eligibility. For this case, a deterministic key could be shaped as content:blog_article:sha256(title|pain_point|sprint_slug|date_bucket). The exact fields are less important than the rule that both the scorer and the enqueue path derive the same key from the same normalized inputs.
The policy version must be explicit. If revenue_worker scored under policy_v17 and autonomous_loop enqueued under policy_v18, the conflict may be legitimate. If both used policy_v17, the conflict is a defect. Without a policy version, every disagreement becomes archaeology. With a policy version, it becomes a database query.
The scoring inputs must be digestible. Store a compact input_digest, not a vague note. The digest should cover normalized candidate text, route metadata, sprint map, cooldown state, and disqualifying flags. That lets the system distinguish two cases that look identical in logs: one candidate was rescored after inputs changed; another was enqueued from a stale local cache.
The deterministic pattern starts with a single verdict object. The object is not a log line and not a convenience struct. It is the contract between scoring, queuing, and execution. A minimal version looks like this:
{ item_key, authority, policy_version, input_digest, score, eligible, ineligible_reasons, issued_at, expires_at, verdict_id }
The authority field identifies the service or module that owns the decision, for example revenue_scoring. The verdict_id should be derived from the authority tuple or stored as a database primary key with a uniqueness constraint on (item_key, authority, policy_version, input_digest). The queue record should reference verdict_id; it should not copy a naked score and pretend that copy remains authoritative forever.
Eligibility must be boolean and reasoned. A score of 0.0 is not the same thing as ineligible. A candidate can score low but remain eligible for backlog; another can score high but be ineligible because of cooldown, duplicate coverage, missing sprint mapping, or forbidden lane state. The verdict must therefore carry both score and eligible. When eligible is false, ineligible_reasons must be non-empty. When eligible is true, the reasons can include warnings, but they cannot include hard disqualifiers.
The enqueue path then becomes intentionally boring. It resolves or requests a verdict, validates it, and inserts the work item in one transaction. Pseudocode should look close to this:
verdict = scoring.get_verdict(candidate); assert verdict.authority == SCORING_AUTHORITY; assert verdict.eligible; assert now < verdict.expires_at; queue.insert(candidate, verdict_id=verdict.verdict_id)
That is the point. The queue does not ask, does this look valuable? The queue asks, has the authority already made this exact candidate eligible? The worker validates the same reference before execution. If the verdict has expired or been superseded, the worker marks the item blocked_stale_verdict rather than improvising a new score in the execution lane.
Most systems try to discover score conflicts through dashboards after the damage has happened. That is late. The safer pattern is to prevent contradictory durable state at write time. A scoring table should allow multiple historical verdicts, but it should not allow two current verdicts for the same authority tuple. Use explicit supersession instead of overwriting rows.
The practical schema is small. A scoring_verdicts table stores immutable verdict rows. A current_scoring_verdicts view or table points to the active verdict for each (item_key, authority). An enqueue transaction must join against the current verdict and require eligible = true. If the current verdict is ineligible, the insert fails with a typed reason. If there is no verdict, the insert fails as missing_verdict. If the verdict exists but the input digest differs, the insert fails as input_digest_mismatch.
In SQLite terms, the insertion logic should be a guarded insert, not an application-level hope. The transaction can select the current verdict row with a busy timeout, confirm the digest and expiry, and insert into work_items with the referenced verdict_id. If no row is returned, no work item is created. The command should emit enqueue_rejected_by_scoring_authority, including the candidate key and rejection reason.
This prevents the exact failure pattern. If revenue_worker has the active verdict eligible=false at 02:00, autonomous_loop cannot write a queue item at 02:05 unless it first obtains a newer active eligible verdict with a different verdict_id. That newer verdict must be visible as a fact. If it is not visible, the enqueue attempt is rejected.
Freshness, cooldowns, and rescoring also belong inside the scoring authority. A verdict should carry issued_at and expires_at. Cooldowns should be hard disqualifiers such as duplicate_cooldown. Rescoring should be idempotent, with explicit reasons like policy_changed, cooldown_elapsed, or input_changed. The wrong fallback is if scorer_unavailable: enqueue_with_default_score. The right fallback is blocked_missing_scoring_authority.
This repair fits a five-day sprint because the target is not a rewrite. It is boundary hardening with a measurable before-and-after state. Each day should leave the system safer than it started.
eligible, inserts blog_article work, or mutates queue priority. The deliverable is a call graph and a conflict reproduction: the same candidate key producing 0.0/ineligible in one path and 3.09/enqueued in another.blog_article insertion requires a current eligible verdict. Remove score recomputation from the queue writer. Add tests for missing_verdict, ineligible_verdict, expired_verdict, and input_digest_mismatch.verdict_id before execution. A stale or superseded verdict blocks the item with a typed status. Emit verdict_issued, enqueue_authorized, enqueue_rejected, and worker_blocked_stale_verdict.The sprint should not chase a smarter scoring formula until the authority boundary is stable. A better score behind a broken boundary only creates more persuasive contradictions. First make legality deterministic. Then improve the model.
A repair like this is only credible if it includes adversarial verification. The core test should create a candidate, issue an ineligible verdict, attempt to enqueue it, and assert that the queue remains unchanged. Then issue a newer eligible verdict with a changed policy version or changed input digest, attempt enqueue again, and assert that the inserted work item references the newer verdict_id. That proves both sides: rejection works, and legitimate rescoring still works.
There should be a regression fixture for the observed incident. The fixture should encode the two facts: revenue_worker scored the candidate 0.0/ineligible, and autonomous_loop later tried to enqueue it with score 3.09. The test passes only if the enqueue attempt is rejected unless a newer authoritative eligible verdict exists. Assert against durable queue state and typed rejection state, not against a vague log message.
Property tests are useful because authority bugs often hide in normalization. Generate candidate variants with whitespace changes, title casing changes, reordered metadata, and equivalent sprint slugs. Equivalent candidates should produce the same key and digest. Materially different candidates should produce a different digest. The scorer and enqueue path must share the same normalization function. If they each implement their own cleanup, the split brain will return under a different name.
Operational verification should include a dry-run replay of recent enqueue attempts. The report should show accepted_by_current_verdict, rejected_missing_verdict, rejected_ineligible, rejected_expired, and rejected_digest_mismatch. A nonzero rejected count is not automatically bad. During cutover, it is evidence that the gate is catching work the old system would have let through. The bad outcome would be zero rejections plus continued downstream ineligibility failures, because that means the gate is cosmetic.
The operating standard after cutover is blunt: no duplicate scoring authorities, no naked score copies, no enqueue without an eligible verdict, no execution with a stale verdict, and no fallback that counterfeits eligibility when the authority is unavailable. The useful system is not the one that produces the most queue entries. It is the one that can explain why each entry exists and why it was allowed to run.
For a compact sprint page that keeps the work bounded instead of turning it into a scoring-model rewrite, use None.
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