merge(learn): exp-003 precision-bound blocking -- inconclusive; the Wilson bound needs 73 clean flags, injection has 38 paired positives

Co-Authored-By: Claude Opus 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01EmM1j46qgKMh3zqD1QMwEo
This commit is contained in:
Marius Ciepluch
2026-10-03 08:21:27 +02:00
co-authored by Claude Opus 5.5
9 changed files with 2150 additions and 21 deletions
@@ -0,0 +1,39 @@
{
"experiment": "exp-003-precision-bound-blocking",
"registered": "2026-10-03",
"store": "s3://sast-memory",
"manifest": "plane/experiments/exp-003-precision-bound-blocking.yaml",
"manifest_digest": "5917f9a12035f09eae76978f3b5827b9fe59c8a9a5275f9ab54c3c1b55e8db3b",
"pin": "dd7ebc119b5ad8e77c05d418eed9cbd46e193587",
"units_status": "frozen",
"units_file": "plane/experiments/exp-003-precision-bound-blocking.units.jsonl",
"units_digest": "338de998b1cfa36857cd793dbc4cf7fd0a13ab517a91f6790335881e941b3006",
"units": {
"total": 353,
"paired": 244,
"groups": 146,
"by_family": {
"access_control": {"units": 41, "positives": 25, "paired": 32, "paired_positives": 16, "groups": 24},
"deserialization": {"units": 48, "positives": 31, "paired": 34, "paired_positives": 17, "groups": 31},
"injection": {"units": 119, "positives": 63, "paired": 76, "paired_positives": 38, "groups": 34},
"output_encoding": {"units": 45, "positives": 29, "paired": 32, "paired_positives": 16, "groups": 27},
"path": {"units": 39, "positives": 23, "paired": 32, "paired_positives": 16, "groups": 23},
"untrusted_destination": {"units": 61, "positives": 37, "paired": 38, "paired_positives": 19, "groups": 36}
},
"note": "frozen model-free on the 937-example static memory; the outer folds (k 5, seed 0, compile fraction 0.25) are the incumbent evaluation's; injection and access_control equal exp-002's 160 units"
},
"kind": "rule: one zero-cost scoring pass of the six slice-2 incumbent programs; arms differ only in the BLOCK rule",
"zero_cost": "responses replayed from the response cache only, behind a meter with zero USD and call ceilings around a refusing client; a unit with any uncached response is excluded and counted; the run is void unless the meter reads 0 calls and $0",
"arms": {
"A": "today's rule: Platt map cross-fitted per family; BLOCK only when the calibration check holds (slope CI contains 1, intercept CI contains 0, ECE <= 0.05); BLOCK point nested on the other folds' calibrated p (Wilson LB >= 0.95)",
"B": "selective blocking: per family and outer fold, threshold chosen on the family's paired units in the other four folds as the lowest raw score t with Wilson 95% LB of flagged precision >= 0.95 (unsure verdicts never flag); none -> no BLOCK on that fold",
"C": "secondary, non-deciding: as B with point precision >= 0.95 over at least 10 training flags"
},
"primary_metric": "held-out (outer-fold) Wilson 95% lower bound of flagged precision, per family, arm B, paired population",
"populations": {"primary": "paired (both sides of the candidate present; excludes every positives-only group and any unpaired unit)", "secondary": ["pooled (every unit)"]},
"secondary_metrics": ["flagged_precision", "coverage (flagged true positives / positives)", "flagged", "repository-cluster bootstrap 95% CI of flagged precision"],
"decision_rule": "REJECT B if in any family B flags held-out paired units at a point precision < 0.95; else ADOPT B if in some family B's held-out paired Wilson LB >= 0.95; else INCONCLUSIVE (the incumbent rule stays)",
"m4_reading": "a family reaches the M4 precision bar on held-out repositories when its held-out paired Wilson LB >= 0.95; point precision reported beside it",
"power": "a Wilson LB of 0.95 needs >= 73 flagged units with no false flag; the largest family holds 38 paired positives over all five folds, so arm B cannot offer a BLOCK in any family by construction; expected verdict inconclusive",
"status": "run and analysed 2026-10-03: inconclusive -- no arm flags any held-out unit (result.json); meter 0 client calls, $0.0; 142 of 353 units excluded for an uncached response"
}
@@ -0,0 +1,981 @@
{
"arms": {
"A": {
"label": "today's rule -- Platt map cross-fitted per family, BLOCK only when the calibration check holds, BLOCK point nested on the other folds' calibrated p",
"rule": {
"name": "calibrated_block"
}
},
"B": {
"label": "selective blocking -- per-family raw-score threshold from the other folds' paired units, lowest t with Wilson 95% LB of flagged precision >= 0.95",
"rule": {
"bound": "wilson",
"name": "precision_bound_block",
"precision": 0.95,
"select_on": "paired"
}
},
"C": {
"label": "secondary, non-deciding -- as B with point precision >= 0.95 over at least 10 training flags",
"rule": {
"bound": "point",
"min_flagged": 10,
"name": "precision_bound_block",
"precision": 0.95,
"select_on": "paired"
}
}
},
"code_commit": "7bb97ad0bca62b5f986c5768297d8b8fca50fae4",
"decision": "inconclusive",
"experiment": "exp-003-precision-bound-blocking",
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},
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}
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}
}
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}
},
"path": {
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},
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}
}
},
"hypothesis": "The calibrated-probability BLOCK rule (Platt map + calibration gate, ECE <= 0.05) is the wrong instrument for M4, which asks for precision on what is flagged. Selective blocking -- a per-family raw-score threshold chosen on training folds only as the lowest one whose Wilson 95% lower bound on flagged precision is >= 0.95 -- reaches the M4 precision bar on held-out repositories where the calibrated rule offers no BLOCK.\n",
"instrument_check": {
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"access_control": {
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"paired": {
"blockable": 28,
"positives_before_first_negative": 10
},
"pooled": {
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"positives_before_first_negative": 19
},
"verdicts": {
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"unsure": 4,
"vulnerable": 18
}
},
"deserialization": {
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"paired": {
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},
"pooled": {
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},
"verdicts": {
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"unsure": 1,
"vulnerable": 11
}
},
"injection": {
"distinct_s": 48,
"paired": {
"blockable": 50,
"positives_before_first_negative": 3
},
"pooled": {
"blockable": 77,
"positives_before_first_negative": 11
},
"verdicts": {
"not_vulnerable": 46,
"unsure": 42,
"vulnerable": 31
}
},
"output_encoding": {
"distinct_s": 14,
"paired": {
"blockable": 11,
"positives_before_first_negative": 0
},
"pooled": {
"blockable": 19,
"positives_before_first_negative": 8
},
"verdicts": {
"not_vulnerable": 9,
"unsure": 5,
"vulnerable": 10
}
},
"untrusted_destination": {
"distinct_s": 9,
"paired": {
"blockable": 4,
"positives_before_first_negative": 1
},
"pooled": {
"blockable": 8,
"positives_before_first_negative": 4
},
"verdicts": {
"not_vulnerable": 3,
"unsure": 5,
"vulnerable": 5
}
}
},
"note": "descriptive, all folds together, ranking by raw score s among non-unsure verdicts; not nested, chooses nothing. It shows the scores are real and the zero is the rule's, not an unread input."
},
"manifest_digest": "5917f9a12035f09eae76978f3b5827b9fe59c8a9a5275f9ab54c3c1b55e8db3b",
"meter": {
"client_calls": 0,
"decided": 211,
"excluded_replay_miss": 142,
"folds_digest": "a1f78e141a572a4adcc9cd57eb8a784c440c177f0b60d5ef5bed9e94c8753c5f",
"metered_usd": 0.0,
"replay_priced_usd_not_spent": 0.582876,
"replayed_responses": 1056
},
"min_flagged_for_bound": 73,
"overall": {
"A": {
"paired": {
"coverage": 0.0,
"flagged": 0,
"flagged_precision": null,
"flagged_precision_ci": null,
"flagged_precision_lb": null,
"groups": 59,
"meets_target_lb": false,
"meets_target_point": false,
"positives": 68,
"true_flagged": 0,
"units": 138
},
"pooled": {
"coverage": 0.0,
"flagged": 0,
"flagged_precision": null,
"flagged_precision_ci": null,
"flagged_precision_lb": null,
"groups": 89,
"meets_target_lb": false,
"meets_target_point": false,
"positives": 122,
"true_flagged": 0,
"units": 211
}
},
"B": {
"paired": {
"coverage": 0.0,
"flagged": 0,
"flagged_precision": null,
"flagged_precision_ci": null,
"flagged_precision_lb": null,
"groups": 59,
"meets_target_lb": false,
"meets_target_point": false,
"positives": 68,
"true_flagged": 0,
"units": 138
},
"pooled": {
"coverage": 0.0,
"flagged": 0,
"flagged_precision": null,
"flagged_precision_ci": null,
"flagged_precision_lb": null,
"groups": 89,
"meets_target_lb": false,
"meets_target_point": false,
"positives": 122,
"true_flagged": 0,
"units": 211
}
},
"C": {
"paired": {
"coverage": 0.0,
"flagged": 0,
"flagged_precision": null,
"flagged_precision_ci": null,
"flagged_precision_lb": null,
"groups": 59,
"meets_target_lb": false,
"meets_target_point": false,
"positives": 68,
"true_flagged": 0,
"units": 138
},
"pooled": {
"coverage": 0.0,
"flagged": 0,
"flagged_precision": null,
"flagged_precision_ci": null,
"flagged_precision_lb": null,
"groups": 89,
"meets_target_lb": false,
"meets_target_point": false,
"positives": 122,
"true_flagged": 0,
"units": 211
}
}
},
"populations": {
"primary": "paired",
"secondary": [
"pooled"
]
},
"primary": [
{
"name": "flagged_precision_lb",
"target": 0.95
}
],
"reason": "B offers no BLOCK on held-out paired units in any family; the incumbent stays",
"resamples": 2000,
"secondary": [
{
"name": "flagged_precision"
},
{
"name": "coverage"
},
{
"name": "flagged"
}
],
"spend_usd": {
"score": 0.0
},
"target_precision": 0.95,
"units": {
"by_label": {
"0": 89,
"1": 122
},
"evaluated": 211,
"excluded_replay_miss": 142,
"frozen": 353,
"groups": 89,
"not_run": 0,
"paired_evaluated": 138,
"unsure": 57
}
}