A bounded
decision engine.
Choose a tool, retain a trajectory, or check one piece of evidence. The fixed requests and both answers are available for inspection.
[ REPORT / 01 ]
Five tasks inside an agent.
These small, hand-authored tasks isolate a decision that a larger agent could delegate: choosing a tool, selecting a complete trajectory, checking relevance, checking completion, or choosing files. Correct labels follow the written request and evidence. They do not establish production agent reliability.
| Decision | Kev result | Jev result | Kev recall | Jev recall | Requests |
|---|---|---|---|---|---|
| Choose one of 15 tools | 100.0% | 100.0% | n/a | n/a | 40 |
| Keep one of four trajectories | 100.0% | 100.0% | n/a | n/a | 24 |
| Judge tool-result relevance | 0.95 F1 | 0.85 F1 | 100.0% | 100.0% | 40 |
| Check subgoal completion | 0.98 F1 | 1.00 F1 | 100.0% | 100.0% | 40 |
| Select files for context | 0.85 F1 | 0.67 F1 | 94.4% | 94.4% | 225 |
The fixtures were published in the earlier report. Model training overlap was not audited. High scores here therefore cannot establish generalization to unseen production traces.
[ REPORT / 02 ]
Inspect the errors,
not just the average.
File-context selection has 18 relevant files among 225 judgments. Rejecting every file would score 92% accuracy while recovering no relevant context. Positive F1, recall, false positives, and false negatives therefore matter more than the combined accuracy across all tasks.
| Decision | Model | True positive | False positive | False negative | True negative | Brier |
|---|---|---|---|---|---|---|
| Judge tool-result relevance | KEV | 20 | 2 | 0 | 18 | 0.0520 |
| Judge tool-result relevance | JEV | 20 | 7 | 0 | 13 | 0.1092 |
| Check subgoal completion | KEV | 20 | 1 | 0 | 19 | 0.0220 |
| Check subgoal completion | JEV | 20 | 0 | 0 | 20 | 0.0065 |
| Select files for context | KEV | 17 | 5 | 1 | 202 | 0.0529 |
| Select files for context | JEV | 17 | 16 | 1 | 191 | 0.0641 |
A false positive keeps an irrelevant result, claims an incomplete subgoal is complete, or adds an irrelevant file. A false negative discards useful evidence or misses a completed subgoal. Brier measures probability error; lower is better. It uses the returned yes probability and the original 0.5 decision threshold.
[ REPORT / 03 ]
Timing and paired variations.
| Decision | Kev p50 | Jev p50 | Kev p95 | Jev p95 |
|---|---|---|---|---|
| Choose one of 15 tools | 37.33 ms | 125.80 ms | 89.95 ms | 272.16 ms |
| Keep one of four trajectories | 32.37 ms | 124.31 ms | 33.53 ms | 171.91 ms |
| Judge tool-result relevance | 31.12 ms | 124.75 ms | 83.71 ms | 173.07 ms |
| Check subgoal completion | 31.10 ms | 132.31 ms | 31.91 ms | 173.93 ms |
| Select files for context | 30.97 ms | 128.16 ms | 31.30 ms | 179.56 ms |
For 72 related pairs, changes in option order or incidental wording preserved the semantic answer in 71/72 Kev pairs and 71/72 Jev pairs. For trajectory choices, semantic agreement compares the selected text after option reordering, not the option key.
The 72 pairs are related copies of 72 base tasks, not 144 independent observations. The 225 file judgments are grouped into 15 search tasks. Client timing includes local versus hosted network paths.
[ REPORT / 04 ]
Support tickets,
then the same tickets again.
The original 40 ticket requests and four fixed team descriptions were sent serially to both models in the same fixed order, first as new states and then as an exact replay. The replay uses no client answer cache. Server caches may apply; Kev retains only four state prefixes by default, so cycling through 40 states is not the same cache condition as CLM's earlier replay.
| Condition | Model | Correct | Accuracy | Client p50 | Client p95 |
|---|---|---|---|---|---|
| New states | KEV | 40/40 | 100.0% | 31.83 ms | 82.46 ms |
| New states | JEV | 40/40 | 100.0% | 122.14 ms | 168.36 ms |
| Exact replay | KEV | 40/40 | 100.0% | 31.42 ms | 83.16 ms |
| Exact replay | JEV | 40/40 | 100.0% | 124.02 ms | 220.62 ms |
[ REPORT / 05 ]
Inspect every narrow decision.
Loading frozen results...
[ REPORT / 06 ]
Historical CLM reference.
These CLM results are from September 24 and were not rerun for this report. The builder verifies that the narrow-decision request hash is identical. The comparison can show how the models answered the same fixture; historical timing remains tied to the original serving stack.
| Decision | Historical CLM | New Kev | New Jev |
|---|---|---|---|
| Choose one of 15 tools | 50.0% | 100.0% | 100.0% |
| Keep one of four trajectories | 58.3% | 100.0% | 100.0% |
| Judge tool-result relevance | 0.18 F1 | 0.95 F1 | 0.85 F1 |
| Check subgoal completion | 0.57 F1 | 0.98 F1 | 1.00 F1 |
| Select files for context | 0.36 F1 | 0.85 F1 | 0.67 F1 |