exp: 补提交轮次40 的 K 成本探针产物（此前漏在未跟踪文件里，是候选档位成本-收益曲线的一手数据）

之前的"倒序"只在 ## 轮次 NN 之间成立：记分板/续篇/按 issue 号命名的条目(如 #27、#24、判别定案)
各有自己的位置，所以打开后第 4 屏才看到新轮次，且 轮次 39 那一族曾压在 52 上面。
现在规则统一：文件头 + 轮次统计 + 算法优化候选常驻最前，其后所有小节按轮次号降序，
无轮次号的行政/教训类(分支清理、事故记录)按约定放最后。

轮次号取自标题里的"轮次 NN"；标题没有的从正文找(#27 那种)，正文也没有的走显式定年表
(两条 #21 的条目按 round40 产物定为轮次 40)。同轮次内保持原有相对顺序，不乱改。

脚本 ml/runs/_sort_log_reverse.py（默认 dry-run，--apply 才写盘），带三重守恒断言：
字符数相同、逐行多重集相同、排序前后 diff -q 与 HEAD 完全一致 ⇒ 这次改动是纯重排
(72 增/72 删只是块边界)。LF 未被整体改写成 CRLF。

docs/ML运行手册审查.md

@@ -40,12 +40,19 @@
 4. APG 收敛与机时（batch 48 下首测）→ APG 日志。
 5. 真模型 R9 → `r9_browser.json`。
 
+## 三′、首次正式预训练失败（2026-10-18，21850 步）与修正
+
+现象：闭环到达 0–0.2%、穿柱 77–97%；MF 残差 2 万步停在 7–8、17k–19k 尖峰到 96；梯度 100% 被裁剪。用 last.pt 实测定位：
+1. **多峰头塌成单峰（主因）**：同一状态 8 个候选间标准差 0.030、动作幅度 0.151。FK / 平滑损失加在 `one_step(随机噪声)` 上去对齐这一条老师 Y，最优解是条件均值 E[Y|X]，左绕 / 右绕取平均正好穿柱。→ 改加在 r = t、t ≤ 0.3 的配对去噪估计 x̂ = z − t·u 上。
+2. **MeanFlow 目标失控**：∂u/∂t 均方根 6–12，而 v 约 1.1，目标被自激的 JVP 项主导。时间嵌入 sin(1000·t) 太陡，JVP 又在 bf16 下算。→ 最高角频率 50；MF 分支 fp32；前 5000 步 p_neq = 0。
+3. **闭环分布偏移被低估（推断）**：增广只有 1°。→ 增广 40% / 3° / 12 步收回；新增 DAgger 阶段（策略走到的状态请老师重规划，2 轮）；开训前加老师轨迹回放自检；每次评估加开环误差与候选多样性。
+
 ## 四、正式训练（三段，每段跑完回传）
 
 | 段 | 命令 | 耗时 | 回传 |
 |---|---|---|---|
 | 数据 | `FROM=kin TO=prep bash ml/pipeline.sh all` | 数小时 | `ml/data/stats.json`、`ml/data/r2.json`、`ml/runs/r4.json` |
-| 训练 | `FROM=train TO=m5 bash ml/pipeline.sh all` | 约 3–6 小时 | `ml/runs/m5_gate_*.json` |
+| 训练（含 DAgger） | `FRESH_FROM=prep FROM=prep TO=m5 bash ml/pipeline.sh all`（增广改了，样本要重打包；gen 不重跑） | 约 9–11 小时（未实测：prep 0.5 + 预训练约 5（fp32 变慢）+ DAgger 约 3.5 + m5 0.3） | `ml/runs/replay_teacher.json`、`ml/runs/base/log.jsonl`、`ml/runs/m5_gate_*.json` |
 | 后训练与评测 | `FROM=apg TO=accept bash ml/pipeline.sh all` | 约 10–20 小时 | `ml/runs/acceptance.json`、`policy_bench.json`、`r9_browser.json` |
 
 中途出错：把出错信息发我，修完用 `FROM=<出错阶段>` 接着跑，前面的不重做。

docs/experiment_round29.json

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+{
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+    "out": "docs/experiment_round29.json",
+    "trace": "ml/runs/round29_trace.pt",
+    "select": "endpoint",
+    "replan": "empty",
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+    "partial": 1,
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+    "seed": 0,
+    "dls": "analytic",
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+  "kin_fp": "2ebcbf17",
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+  "metrics": {
+    "n": 512,
+    "n_ref": 512,
+    "success": 0.55078125,
+    "collision_free_success": 0.546875,
+    "time_ok_1p3": 0.361328125,
+    "collision_rate": 0.017578125,
+    "collision_steps_mean": 0.1015625,
+    "travel_ratio_median": 2.425084352493286,
+    "time_mean_s": 2.322056770324707,
+    "brakes_mean": 19.228515625,
+    "start_fail": 0.0,
+    "goal_ratio_2s": 0.25053170323371887,
+    "err_fail_med": 194.51763916015625,
+    "err_success_med": 0.1961677223443985,
+    "dls_share": 0.634765625,
+    "time_budget": "teacher×2(≥3 s)"
+  },
+  "simulation_wall_s": 488.4280448999925
+}

docs/experiment_round29_collisions.json

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docs/experiment_round30_after.json

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docs/experiment_round30_before.json

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docs/experiment_round30_certificates.json

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docs/experiment_round30_comparison.json

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docs/experiment_round30_dense_after.json

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docs/experiment_round30_dense_before.json

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docs/experiment_round30_missed_segment.json

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+}

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+}

docs/experiment_round31_distance.json

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+{
+  "baseline_commit": "95da491",
+  "poses": "first 64 existing parity poses",
+  "n_poses": 64,
+  "kin_fp": "2ebcbf17",
+  "dtype": "float64",
+  "degenerate_capsules": [
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+  "pairs_with_second_degenerate": 670,
+  "evaluated_pairs": 42880,
+  "changed_pairs_over_1e_8": 20661,
+  "old_minus_new_min_mm": 0.0,
+  "old_minus_new_max_mm": 86.00309853133399,
+  "new_reverse_max_abs_mm": 0.0,
+  "worst": {
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+    "first_capsule": 430,
+    "second_capsule": 686,
+    "old_distance_mm": 493.354753665718,
+    "new_distance_mm": 407.35165513438403
+  },
+  "scope": "Raw capsule distances; does not imply these pairs win the group minimum."
+}

docs/experiment_round31_kernel_replay.json

@@ -0,0 +1,16 @@
+{
+  "baseline_commit": "95da491",
+  "sample_source": "docs/experiment_round31_certificates.json",
+  "segments": 48,
+  "dense_points": 7586,
+  "max_step_deg": 0.01,
+  "cap_mm": 0.5,
+  "dtype": "float64",
+  "device": "cuda",
+  "kin_fp": "2ebcbf17",
+  "max_group_gap_difference_mm": 0.0,
+  "group_gaps_changed_over_1e_8": 0,
+  "minimum_gaps_changed_over_1e_8": 0,
+  "collision_bool_mismatches": 0,
+  "wall_s": 4.18259759999637
+}

docs/experiment_round31_parity.json

@@ -0,0 +1,10 @@
+{
+ "n": 2000,
+ "fk_max_abs_mm": 4.547473508864641e-13,
+ "orient_max_abs": 3.3306690738754696e-16,
+ "gap_max_abs_mm": 2.5224267119483557e-13,
+ "collide_bool_mismatch": 0,
+ "feat_max_abs": 5.960463655974024e-08,
+ "grad_rel_err_max": 1.8474076070450906e-06,
+ "PASS": true
+}

docs/experiment_round32_bound_falsification.json

@@ -0,0 +1,22 @@
+{
+  "scope": "全部 48 段 × 15 组对 = 720 项检验；观察值按 cap=2.0 mm 钳制，故可检验命题取 min(预测下限, cap)。违例=实测最小间隙低于该下限。",
+  "checks": 720,
+  "violations": [],
+  "worst_margin_mm": 0.0,
+  "min_slack_mm": 1e-06,
+  "dense_cap_mm": 2.0,
+  "grid_points_per_segment": 121,
+  "supersedes": "docs/experiment_round32_uniform_validation.json 里 bound_checks=61 的部分覆盖版本",
+  "kin_fp": "2ebcbf17",
+  "wall_s": 1.66,
+  "nontrivial": {
+    "definition": "只有预测下限 < 观察 cap 才是有信息量的检验；其余组对被钳制恒等式自动满足",
+    "checks": 61,
+    "min_slack_mm": 0.035347,
+    "p10_slack_mm": 0.544274,
+    "violations": 0,
+    "pred_mm_median_all": 15.8639,
+    "pred_mm_max_all": 19.9582
+  },
+  "note": "720 项总检验 0 违例，其中有信息量的是 61 项；预测下限的中位数 15.9 mm 远大于观察 cap 2 mm，所以大部分组对无法在本网格上证伪"
+}

docs/experiment_round32_uniform_latency.json

@@ -0,0 +1,190 @@
+{
+  "device": "cuda float64",
+  "torch": "2.10.0+cu130",
+  "kin_fp": "2ebcbf17",
+  "roots_per_call": 2,
+  "pairs": 24,
+  "warm": 3,
+  "reps": 7,
+  "segment_sample": "docs/experiment_round31_certificates.json 的 48 段两两成对",
+  "design": "每对根轮流按正序/逆序测完全部配置（3次预热+7次计时）；uniform_auto 的宽相位=最大子段界+2eps，uniform_cap20 固定 20 mm，bisect 为第31轮逐层二分口径",
+  "results": [
+    {
+      "kind": "uniform_auto",
+      "n_or_budget": 8,
+      "points": 18,
+      "cap_used_mm": 5.9191,
+      "calls": 168,
+      "p50_ms": 9.684,
+      "p90_ms": 13.027,
+      "p99_ms": 15.157,
+      "max_ms": 17.537,
+      "over_20ms": 0,
+      "roots": 48,
+      "safe": 26,
+      "collision": 1,
+      "rejected": 21
+    },
+    {
+      "kind": "uniform_auto",
+      "n_or_budget": 16,
+      "points": 34,
+      "cap_used_mm": 2.9597,
+      "calls": 168,
+      "p50_ms": 14.137,
+      "p90_ms": 18.454,
+      "p99_ms": 20.866,
+      "max_ms": 21.632,
+      "over_20ms": 5,
+      "roots": 48,
+      "safe": 30,
+      "collision": 1,
+      "rejected": 17
+    },
+    {
+      "kind": "uniform_auto",
+      "n_or_budget": 32,
+      "points": 66,
+      "cap_used_mm": 1.4799,
+      "calls": 168,
+      "p50_ms": 20.209,
+      "p90_ms": 27.88,
+      "p99_ms": 32.268,
+      "max_ms": 35.563,
+      "over_20ms": 87,
+      "roots": 48,
+      "safe": 34,
+      "collision": 1,
+      "rejected": 13
+    },
+    {
+      "kind": "uniform_auto",
+      "n_or_budget": 64,
+      "points": 130,
+      "cap_used_mm": 0.7401,
+      "calls": 168,
+      "p50_ms": 31.429,
+      "p90_ms": 48.751,
+      "p99_ms": 57.697,
+      "max_ms": 62.084,
+      "over_20ms": 165,
+      "roots": 48,
+      "safe": 36,
+      "collision": 1,
+      "rejected": 11
+    },
+    {
+      "kind": "uniform_auto",
+      "n_or_budget": 128,
+      "points": 258,
+      "cap_used_mm": 0.3701,
+      "calls": 168,
+      "p50_ms": 59.761,
+      "p90_ms": 89.063,
+      "p99_ms": 109.086,
+      "max_ms": 117.345,
+      "over_20ms": 168,
+      "roots": 48,
+      "safe": 38,
+      "collision": 1,
+      "rejected": 9
+    },
+    {
+      "kind": "uniform_cap20",
+      "n_or_budget": 8,
+      "points": 18,
+      "cap_used_mm": 20.0,
+      "calls": 168,
+      "p50_ms": 13.129,
+      "p90_ms": 16.44,
+      "p99_ms": 20.963,
+      "max_ms": 24.67,
+      "over_20ms": 3,
+      "roots": 48,
+      "safe": 26,
+      "collision": 1,
+      "rejected": 21
+    },
+    {
+      "kind": "uniform_cap20",
+      "n_or_budget": 32,
+      "points": 66,
+      "cap_used_mm": 20.0,
+      "calls": 168,
+      "p50_ms": 28.415,
+      "p90_ms": 39.579,
+      "p99_ms": 53.023,
+      "max_ms": 59.983,
+      "over_20ms": 153,
+      "roots": 48,
+      "safe": 34,
+      "collision": 1,
+      "rejected": 13
+    },
+    {
+      "kind": "uniform_cap20",
+      "n_or_budget": 64,
+      "points": 130,
+      "cap_used_mm": 20.0,
+      "calls": 168,
+      "p50_ms": 50.85,
+      "p90_ms": 75.512,
+      "p99_ms": 88.355,
+      "max_ms": 91.492,
+      "over_20ms": 168,
+      "roots": 48,
+      "safe": 36,
+      "collision": 1,
+      "rejected": 11
+    },
+    {
+      "kind": "uniform_cap20",
+      "n_or_budget": 128,
+      "points": 258,
+      "cap_used_mm": 20.0,
+      "calls": 168,
+      "p50_ms": 98.46,
+      "p90_ms": 139.982,
+      "p99_ms": 167.042,
+      "max_ms": 177.743,
+      "over_20ms": 168,
+      "roots": 48,
+      "safe": 38,
+      "collision": 1,
+      "rejected": 9
+    },
+    {
+      "kind": "bisect",
+      "n_or_budget": 32,
+      "points": null,
+      "cap_used_mm": 20.0,
+      "calls": 168,
+      "p50_ms": 54.885,
+      "p90_ms": 82.151,
+      "p99_ms": 117.205,
+      "max_ms": 118.716,
+      "over_20ms": 133,
+      "roots": 48,
+      "safe": 37,
+      "collision": 1,
+      "rejected": 10
+    },
+    {
+      "kind": "bisect",
+      "n_or_budget": 65,
+      "points": null,
+      "cap_used_mm": 20.0,
+      "calls": 168,
+      "p50_ms": 71.825,
+      "p90_ms": 108.559,
+      "p99_ms": 122.533,
+      "max_ms": 127.319,
+      "over_20ms": 133,
+      "roots": 48,
+      "safe": 41,
+      "collision": 1,
+      "rejected": 6
+    }
+  ],
+  "wall_s": 108.63
+}

docs/experiment_round32_uniform_validation.json

@@ -0,0 +1,62 @@
+{
+  "segments": 48,
+  "kin_fp": "2ebcbf17",
+  "dense_cap_mm": 2.0,
+  "eps_mm": 0.0001,
+  "bound_falsification": "每条组对：预测下限 (ga+gb-bound)/2 应 ≤ 网格上该组对的最小实测间隙",
+  "per_segment": [
+    {
+      "n": 8,
+      "safe": 26,
+      "collision": 1,
+      "unproven": 21,
+      "outside_box": 0,
+      "false_accept_vs_dense": 0,
+      "cap_required_mm": 5.919107314806348,
+      "known_missed_segment_collision": true
+    },
+    {
+      "n": 16,
+      "safe": 30,
+      "collision": 1,
+      "unproven": 17,
+      "outside_box": 0,
+      "false_accept_vs_dense": 0,
+      "cap_required_mm": 2.959653657403174,
+      "known_missed_segment_collision": true
+    },
+    {
+      "n": 32,
+      "safe": 34,
+      "collision": 1,
+      "unproven": 13,
+      "outside_box": 0,
+      "false_accept_vs_dense": 0,
+      "cap_required_mm": 1.479926828701587,
+      "known_missed_segment_collision": true
+    },
+    {
+      "n": 64,
+      "safe": 36,
+      "collision": 1,
+      "unproven": 11,
+      "outside_box": 0,
+      "false_accept_vs_dense": 0,
+      "cap_required_mm": 0.7400634143507935,
+      "known_missed_segment_collision": true
+    },
+    {
+      "n": 128,
+      "safe": 38,
+      "collision": 1,
+      "unproven": 9,
+      "outside_box": 0,
+      "false_accept_vs_dense": 0,
+      "cap_required_mm": 0.37013170717539673,
+      "known_missed_segment_collision": true
+    }
+  ],
+  "bound_checks": 61,
+  "bound_violations": [],
+  "worst_margin_mm": 0.0
+}

docs/experiment_round33_base.json

@@ -0,0 +1,70 @@
+{
+  "config": {
+    "ckpt": "ml/runs/base_dag2_dag1/best.pt",
+    "samples": "ml/data/samples",
+    "tasks": null,
+    "split": "val",
+    "n": 256,
+    "K": 8,
+    "commit": 2,
+    "fb": 2.2,
+    "ki": 0.0,
+    "fb_scale": 0.0,
+    "fb_near": 0.2,
+    "fb_fallback": 0.0,
+    "kdecay": 0.9,
+    "kimax": 0.5,
+    "fb_every": 1,
+    "safety_try": 0,
+    "sel_w": 0.1,
+    "dls_safety": 1,
+    "fb_clear": 0.0,
+    "fb_cmin": 0.3,
+    "sub_refresh": 0,
+    "fb_block_gain": 0.5,
+    "dump": "ml/runs/round33_base_rows.json",
+    "out": "docs/experiment_round33_base.json",
+    "trace": "ml/runs/round33_base.pt",
+    "select": "endpoint",
+    "replan": "empty",
+    "safety": 1,
+    "partial": 1,
+    "inc_cap": 0,
+    "gap_margin": 0.0,
+    "max_sec": null,
+    "seed": 0,
+    "dls": "analytic",
+    "device": "cuda"
+  },
+  "batch_size": 256,
+  "batch_seed_rule": "same seed per batch",
+  "checkpoint_sha256": "f7f686fd8ee92fb6948fbcc4ee954636065ad87bb54f661c4f8f575bc16c2ce1",
+  "tasks_sha256": "249bd93457825cda98c59e64d9a096d3473c69aeb3553de1dea6d9e56be71772",
+  "kin_fp": "2ebcbf17",
+  "act_scale": 1.0,
+  "metrics": {
+    "n": 256,
+    "n_ref": 256,
+    "success": 0.57421875,
+    "collision_free_success": 0.57421875,
+    "time_ok_1p3": 0.390625,
+    "collision_rate": 0.0,
+    "collision_steps_mean": 0.0,
+    "travel_ratio_median": 2.4449527263641357,
+    "time_mean_s": 2.3076188564300537,
+    "brakes_mean": 19.25,
+    "start_fail": 0.0,
+    "goal_ratio_2s": 0.20997506380081177,
+    "err_fail_med": 229.68746948242188,
+    "err_success_med": 0.18899640440940857,
+    "dls_share": 0.625,
+    "time_budget": "teacher×2(≥3 s)",
+    "speed_ratio_p50": 1.6600004434585571,
+    "speed_ratio_p95": 1.6600035429000854,
+    "speed_ratio_max": 1.660003662109375,
+    "over_vmax_rate": 1.0,
+    "accel_ratio_p95": 1.5835107564926147,
+    "accel_ratio_max": 1.6600004434585571
+  },
+  "simulation_wall_s": 296.2702505999914
+}

docs/experiment_round33_both.json

@@ -0,0 +1,70 @@
+{
+  "config": {
+    "ckpt": "ml/runs/base_dag2_dag1/best.pt",
+    "samples": "ml/data/samples",
+    "tasks": null,
+    "split": "val",
+    "n": 256,
+    "K": 8,
+    "commit": 2,
+    "fb": 2.2,
+    "ki": 0.0,
+    "fb_scale": 0.0,
+    "fb_near": 0.2,
+    "fb_fallback": 0.0,
+    "kdecay": 0.9,
+    "kimax": 0.5,
+    "fb_every": 1,
+    "safety_try": 0,
+    "sel_w": 0.1,
+    "dls_safety": 1,
+    "fb_clear": 0.0,
+    "fb_cmin": 0.3,
+    "sub_refresh": 0,
+    "fb_block_gain": 0.5,
+    "dump": "ml/runs/round33_both_rows.json",
+    "out": "docs/experiment_round33_both.json",
+    "trace": "ml/runs/round33_both.pt",
+    "select": "endpoint",
+    "replan": "empty",
+    "safety": 1,
+    "partial": 1,
+    "inc_cap": 1,
+    "gap_margin": 0.5,
+    "max_sec": null,
+    "seed": 0,
+    "dls": "analytic",
+    "device": "cuda"
+  },
+  "batch_size": 256,
+  "batch_seed_rule": "same seed per batch",
+  "checkpoint_sha256": "f7f686fd8ee92fb6948fbcc4ee954636065ad87bb54f661c4f8f575bc16c2ce1",
+  "tasks_sha256": "249bd93457825cda98c59e64d9a096d3473c69aeb3553de1dea6d9e56be71772",
+  "kin_fp": "2ebcbf17",
+  "act_scale": 1.0,
+  "metrics": {
+    "n": 256,
+    "n_ref": 256,
+    "success": 0.51953125,
+    "collision_free_success": 0.51953125,
+    "time_ok_1p3": 0.26171875,
+    "collision_rate": 0.0,
+    "collision_steps_mean": 0.0,
+    "travel_ratio_median": 2.5444939136505127,
+    "time_mean_s": 2.4729323387145996,
+    "brakes_mean": 19.97265625,
+    "start_fail": 0.0,
+    "goal_ratio_2s": 0.2868920564651489,
+    "err_fail_med": 202.12567138671875,
+    "err_success_med": 0.22085000574588776,
+    "dls_share": 0.62109375,
+    "time_budget": "teacher×2(≥3 s)",
+    "speed_ratio_p50": 1.0000016689300537,
+    "speed_ratio_p95": 1.0000101327896118,
+    "speed_ratio_max": 1.0000101327896118,
+    "over_vmax_rate": 0.0,
+    "accel_ratio_p95": 1.0000016689300537,
+    "accel_ratio_max": 1.0000101327896118
+  },
+  "simulation_wall_s": 277.54961390000244
+}

docs/experiment_round33_cap.json

@@ -0,0 +1,70 @@
+{
+  "config": {
+    "ckpt": "ml/runs/base_dag2_dag1/best.pt",
+    "samples": "ml/data/samples",
+    "tasks": null,
+    "split": "val",
+    "n": 256,
+    "K": 8,
+    "commit": 2,
+    "fb": 2.2,
+    "ki": 0.0,
+    "fb_scale": 0.0,
+    "fb_near": 0.2,
+    "fb_fallback": 0.0,
+    "kdecay": 0.9,
+    "kimax": 0.5,
+    "fb_every": 1,
+    "safety_try": 0,
+    "sel_w": 0.1,
+    "dls_safety": 1,
+    "fb_clear": 0.0,
+    "fb_cmin": 0.3,
+    "sub_refresh": 0,
+    "fb_block_gain": 0.5,
+    "dump": "ml/runs/round33_cap_rows.json",
+    "out": "docs/experiment_round33_cap.json",
+    "trace": "ml/runs/round33_cap.pt",
+    "select": "endpoint",
+    "replan": "empty",
+    "safety": 1,
+    "partial": 1,
+    "inc_cap": 1,
+    "gap_margin": 0.0,
+    "max_sec": null,
+    "seed": 0,
+    "dls": "analytic",
+    "device": "cuda"
+  },
+  "batch_size": 256,
+  "batch_seed_rule": "same seed per batch",
+  "checkpoint_sha256": "f7f686fd8ee92fb6948fbcc4ee954636065ad87bb54f661c4f8f575bc16c2ce1",
+  "tasks_sha256": "249bd93457825cda98c59e64d9a096d3473c69aeb3553de1dea6d9e56be71772",
+  "kin_fp": "2ebcbf17",
+  "act_scale": 1.0,
+  "metrics": {
+    "n": 256,
+    "n_ref": 256,
+    "success": 0.5234375,
+    "collision_free_success": 0.5234375,
+    "time_ok_1p3": 0.265625,
+    "collision_rate": 0.0,
+    "collision_steps_mean": 0.0,
+    "travel_ratio_median": 2.615795850753784,
+    "time_mean_s": 2.486567258834839,
+    "brakes_mean": 19.5546875,
+    "start_fail": 0.0,
+    "goal_ratio_2s": 0.27920001745224,
+    "err_fail_med": 204.71360778808594,
+    "err_success_med": 0.21751396358013153,
+    "dls_share": 0.61328125,
+    "time_budget": "teacher×2(≥3 s)",
+    "speed_ratio_p50": 1.0000016689300537,
+    "speed_ratio_p95": 1.0000101327896118,
+    "speed_ratio_max": 1.0000101327896118,
+    "over_vmax_rate": 0.0,
+    "accel_ratio_p95": 1.0000016689300537,
+    "accel_ratio_max": 1.0000101327896118
+  },
+  "simulation_wall_s": 325.18856850000157
+}

docs/experiment_round33_gpu_cycle.json

@@ -0,0 +1,202 @@
+{
+  "device": "NVIDIA GeForce RTX 3090",
+  "torch": "2.10.0+cu130",
+  "act_scale": 1.0,
+  "cfg": {},
+  "B": 1,
+  "commit_n": 2,
+  "fp64_note": "3090 fp64 \u541e\u5410\u7ea6 fp32 \u7684 1/54\uff1b\u8ba4\u8bc1\u76ee\u524d\u8981\u6c42 fp64",
+  "inference": {
+    "sample_K1_steps1": {
+      "p50": 7.453,
+      "p95": 9.912,
+      "p99": 10.766,
+      "max": 11.109,
+      "reps": 120
+    },
+    "sample_K8_steps1": {
+      "p50": 8.208,
+      "p95": 10.685,
+      "p99": 11.22,
+      "max": 15.224,
+      "reps": 120
+    },
+    "sample_K1_steps2": {
+      "p50": 13.149,
+      "p95": 17.621,
+      "p99": 18.438,
+      "max": 19.296,
+      "reps": 120
+    },
+    "sample_K8_steps2": {
+      "p50": 14.167,
+      "p95": 19.241,
+      "p99": 24.77,
+      "max": 25.703,
+      "reps": 120
+    },
+    "sample_K1_steps4": {
+      "p50": 19.193,
+      "p95": 22.338,
+      "p99": 23.666,
+      "max": 25.787,
+      "reps": 120
+    },
+    "sample_K8_steps4": {
+      "p50": 21.509,
+      "p95": 24.732,
+      "p99": 35.655,
+      "max": 41.514,
+      "reps": 120
+    },
+    "sample_K1_steps8": {
+      "p50": 40.658,
+      "p95": 55.162,
+      "p99": 60.394,
+      "max": 60.398,
+      "reps": 120
+    },
+    "sample_K8_steps8": {
+      "p50": 40.416,
+      "p95": 47.997,
+      "p99": 62.49,
+      "max": 71.976,
+      "reps": 120
+    },
+    "sample_K1_steps16": {
+      "p50": 72.429,
+      "p95": 90.188,
+      "p99": 107.536,
+      "max": 112.674,
+      "reps": 120
+    },
+    "sample_K8_steps16": {
+      "p50": 79.893,
+      "p95": 99.933,
+      "p99": 105.746,
+      "max": 106.078,
+      "reps": 120
+    }
+  },
+  "encode_once": {
+    "p50": 2.265,
+    "p95": 4.001,
+    "p99": 6.086,
+    "max": 6.136,
+    "reps": 120
+  },
+  "tiny_op_ms": 0.028,
+  "sync_only_ms": 0.005,
+  "components": {
+    "features_f32": {
+      "p50": 12.443,
+      "p95": 14.227,
+      "p99": 19.678,
+      "max": 20.531,
+      "reps": 120
+    },
+    "endpoint_score_K8_f32": {
+      "p50": 4.278,
+      "p95": 5.841,
+      "p99": 6.322,
+      "max": 8.883,
+      "reps": 120
+    },
+    "dls_fb_1step_f64": {
+      "p50": 7.191,
+      "p95": 12.26,
+      "p99": 14.642,
+      "max": 15.384,
+      "reps": 120
+    },
+    "dls_fb_1step_f32": {
+      "p50": 7.619,
+      "p95": 10.142,
+      "p99": 11.597,
+      "max": 12.022,
+      "reps": 120
+    },
+    "discrete_cert_4pts_f32": {
+      "p50": 8.214,
+      "p95": 13.365,
+      "p99": 14.235,
+      "max": 14.991,
+      "reps": 120
+    },
+    "cert_n8_f64_2roots": {
+      "p50": 11.265,
+      "p95": 14.64,
+      "p99": 16.788,
+      "max": 17.761,
+      "reps": 120
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+}

docs/experiment_round33_gpu_cycle_steps1.json

@@ -0,0 +1,143 @@
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docs/experiment_round33_margin.json

@@ -0,0 +1,70 @@
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docs/experiment_round34_cert_batch_check.json

@@ -0,0 +1,71 @@
+{
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docs/experiment_round34_f32_cert.json

@@ -0,0 +1,41 @@
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+}

docs/experiment_round34_fused_cycle.json

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docs/experiment_round34_geom_opt.json

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docs/experiment_round34_precision_ab.json

@@ -0,0 +1,58 @@
+{
+  "device": "NVIDIA GeForce RTX 3090",
+  "torch": "2.10.0+cu130",
+  "K": 8,
+  "steps": 1,
+  "B": 1,
+  "act_scale": 1.0,
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+  "output_deviation": {
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+      "act_p99_abs": 0.001059,
+      "deg_max_abs": 0.005,
+      "deg_p99_abs": 0.00219,
+      "would_change_execution_order": false
+    },
+    "bf16": {
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+      "deg_max_abs": 0.03766,
+      "deg_p99_abs": 0.03008,
+      "would_change_execution_order": true
+    }
+  }
+}

docs/experiment_round34_xf_reuse_check.json

@@ -0,0 +1,70 @@
+{
+  "config": {
+    "ckpt": "ml/runs/base_dag2_dag1/best.pt",
+    "samples": "ml/data/samples",
+    "tasks": null,
+    "split": "val",
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+    "K": 8,
+    "commit": 2,
+    "fb": 2.2,
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+    "kimax": 0.5,
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+    "fb_cmin": 0.3,
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+    "fb_block_gain": 0.5,
+    "dump": null,
+    "out": "docs/experiment_round34_xf_reuse_check.json",
+    "trace": null,
+    "select": "endpoint",
+    "replan": "empty",
+    "safety": 1,
+    "partial": 1,
+    "inc_cap": 0,
+    "gap_margin": 0.0,
+    "max_sec": null,
+    "seed": 0,
+    "dls": "analytic",
+    "device": "cuda"
+  },
+  "batch_size": 256,
+  "batch_seed_rule": "same seed per batch",
+  "checkpoint_sha256": "f7f686fd8ee92fb6948fbcc4ee954636065ad87bb54f661c4f8f575bc16c2ce1",
+  "tasks_sha256": "249bd93457825cda98c59e64d9a096d3473c69aeb3553de1dea6d9e56be71772",
+  "kin_fp": "2ebcbf17",
+  "act_scale": 1.0,
+  "metrics": {
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+    "time_budget": "teacher×2(≥3 s)",
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+    "over_vmax_rate": 1.0,
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+  "simulation_wall_s": 317.96790459999465
+}

docs/experiment_round35_pipeline_gaps.json

@@ -0,0 +1,23 @@
+{
+  "device": "NVIDIA GeForce RTX 3090",
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+  "commit_n": 2,
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+  "equivalence": {
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+    "features_bitwise_equal": false,
+    "max_row_diff_mm": 6.29425048828125e-05
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+}

docs/experiment_round36_kmf_e1.json

@@ -0,0 +1,337 @@
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docs/experiment_round36_kmf_e1b.json

@@ -0,0 +1,97 @@
+{
+ "n": 512,
+ "steps": {
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+   "vs_32step_l2": 0.0,
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+ },
+ "vs_teacher": {
+  "a1_1step": {
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+   "l2_p95": 4.9564337730407715,
+   "per_axis_norm": [
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+    0.36649173498153687,
+    0.3425973951816559,
+    0.3447648882865906,
+    0.3368167281150818,
+    0.32962310314178467
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+  "aU_32step_rneq_t": {
+   "l2_mean": 0.6008902192115784,
+   "l2_p95": 1.9733507633209229,
+   "per_axis_norm": [
+    0.05318881571292877,
+    0.04853545129299164,
+    0.04775547981262207,
+    0.04531646892428398,
+    0.0381026417016983,
+    0.034751877188682556
+   ]
+  },
+  "aF_flow_map_r_eq_t": {
+   "l2_mean": 0.6651337146759033,
+   "l2_p95": 1.9794291257858276,
+   "per_axis_norm": [
+    0.06039007008075714,
+    0.05440700799226761,
+    0.05297258496284485,
+    0.05065540224313736,
+    0.04315900802612305,
+    0.03988185524940491
+   ]
+  }
+ },
+ "mutual": [
+  {
+   "l2_mean": 3.970090866088867,
+   "pair": [
+    "a1",
+    "aU_32"
+   ]
+  },
+  {
+   "l2_mean": 3.891127109527588,
+   "pair": [
+    "a1",
+    "aF_flow"
+   ]
+  },
+  {
+   "l2_mean": 0.08254596590995789,
+   "pair": [
+    "aU_32",
+    "aF_flow"
+   ]
+  }
+ ],
+ "note": "动作块是 ±1 归一化的 16×6；l2_mean 无单位权重，越小越贴老师"
+}

docs/experiment_round36_plan_r_hist.json

@@ -0,0 +1,50 @@
+{
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+  "r_hist": {
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+  "success": 0.4375,
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+  "wall_s": 43.831084999997984
+ }
+}

docs/experiment_round36_steps2_cap0.json

@@ -0,0 +1,73 @@
+{
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+    "samples": "ml/data/samples",
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+    "out": "docs/experiment_round36_steps2_cap0.json",
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+}

docs/experiment_round36_steps2_cap1.json

@@ -0,0 +1,73 @@
+{
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+    "dump": "ml/runs/round36_steps2_cap1_rows.json",
+    "out": "docs/experiment_round36_steps2_cap1.json",
+    "trace": null,
+    "select": "endpoint",
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+  "kin_fp": "2ebcbf17",
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+}

docs/experiment_round36_steps4_cap1.json

@@ -0,0 +1,73 @@
+{
+  "config": {
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+    "samples": "ml/data/samples",
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+    "fb_block_gain": 0.5,
+    "dump": "ml/runs/round36_steps4_cap1_rows.json",
+    "out": "docs/experiment_round36_steps4_cap1.json",
+    "trace": null,
+    "select": "endpoint",
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+    "gap_margin": 0.0,
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+    "seed": 0,
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+  "batch_seed_rule": "same seed per batch",
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+  "kin_fp": "2ebcbf17",
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+    "err_success_med": 0.1346309632062912,
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+    "accel_ratio_max": 1.0000005960464478
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+}

docs/experiment_round36_steps8_cap1.json

@@ -0,0 +1,73 @@
+{
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+    "dump": "ml/runs/round36_steps8_cap1_rows.json",
+    "out": "docs/experiment_round36_steps8_cap1.json",
+    "trace": null,
+    "select": "endpoint",
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+    "cert_batch": 0,
+    "steps": 8,
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+    "dls": "analytic",
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+  "checkpoint_sha256": "f7f686fd8ee92fb6948fbcc4ee954636065ad87bb54f661c4f8f575bc16c2ce1",
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+}

docs/experiment_round36_time_audit.json

@@ -0,0 +1,106 @@
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docs/experiment_round38_backoff0.json

@@ -0,0 +1,82 @@
+{
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+    "samples": "ml/data/samples",
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docs/experiment_round38_backoff1.json

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docs/experiment_round38_backoff2.json

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docs/experiment_round38_backoff3.json

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docs/experiment_round38_cand_div.json

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docs/experiment_round38_fail_taxonomy.json

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docs/experiment_round39_K16.json

@@ -0,0 +1,77 @@
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docs/experiment_round39_lenw0.1.json

@@ -0,0 +1,75 @@
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docs/experiment_round39_lenw0.3.json

@@ -0,0 +1,75 @@
+{
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docs/experiment_round39_lenw1.0.json

@@ -0,0 +1,75 @@
+{
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docs/experiment_round39_margin_audit.json

@@ -0,0 +1,32 @@
+{
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+}

docs/experiment_round39_reverse_offline.json

@@ -0,0 +1,16 @@
+[
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+]

docs/experiment_round39_travel_decomp.json

@@ -0,0 +1,28 @@
+{
+ "n": 256,
+ "travel_ratio_median": 2.425084623442128,
+ "travel_ratio_population": "arrived & 有老师参考（与 eval 的 okr 同口径）",
+ "reverse_rate": {
+  "p25": 0.15732546150684357,
+  "p50": 0.23536035418510437,
+  "p75": 0.3025793731212616
+ },
+ "net_over_travel_p50": 0.4447892699092449,
+ "excursion_over_travel_p50": 0.5067885044066773,
+ "still_rate_p50": 0.028846153989434242,
+ "by_group": {
+  "arrived": {
+   "n": 147,
+   "reverse_p50": 0.26143792271614075,
+   "net_over_travel_p50": 0.47818613856136644,
+   "excursion_p50": 0.5500977881151917
+  },
+  "failed": {
+   "n": 109,
+   "reverse_p50": 0.14653243124485016,
+   "net_over_travel_p50": 0.3515762667187255,
+   "excursion_p50": 0.39037085057225707
+  }
+ },
+ "note": "net/行程 越接近 1 越\"单向\"；越小越来回抖。excursion/行程 = 各轴走过最大幅度的和 / 总行程，绕远时它接近 1、抖动时明显小于 1"
+}

docs/experiment_round39_try1.json

@@ -0,0 +1,77 @@
+{
+  "config": {
+    "ckpt": "ml/runs/base_dag2_dag1/best.pt",
+    "samples": "ml/data/samples",
+    "tasks": null,
+    "split": "val",
+    "n": 256,
+    "K": 8,
+    "commit": 2,
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+    "kimax": 0.5,
+    "fb_every": 1,
+    "safety_try": 1,
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+    "fb_clear": 0.0,
+    "fb_cmin": 0.3,
+    "sub_refresh": 0,
+    "fb_block_gain": 0.5,
+    "dump": null,
+    "out": "docs/experiment_round39_try1.json",
+    "trace": null,
+    "select": "endpoint",
+    "replan": "empty",
+    "safety": 1,
+    "partial": 1,
+    "inc_cap": 1,
+    "gap_margin": 0.0,
+    "cert_batch": 0,
+    "steps": 1,
+    "z_scale": 1.0,
+    "len_w": 0.0,
+    "backoff": 0,
+    "max_sec": null,
+    "seed": 0,
+    "dls": "analytic",
+    "device": "cuda"
+  },
+  "batch_size": 256,
+  "batch_seed_rule": "same seed per batch",
+  "checkpoint_sha256": "f7f686fd8ee92fb6948fbcc4ee954636065ad87bb54f661c4f8f575bc16c2ce1",
+  "tasks_sha256": "249bd93457825cda98c59e64d9a096d3473c69aeb3553de1dea6d9e56be71772",
+  "kin_fp": "2ebcbf17",
+  "act_scale": 1.0,
+  "metrics": {
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+    "n_ref": 256,
+    "success": 0.40234375,
+    "collision_free_success": 0.40234375,
+    "time_ok_1p3": 0.22265625,
+    "collision_rate": 0.0,
+    "collision_steps_mean": 0.0,
+    "travel_ratio_median": 2.5106539726257324,
+    "time_mean_s": 2.253203868865967,
+    "brakes_mean": 60.44140625,
+    "start_fail": 0.0,
+    "goal_ratio_2s": 0.4367985725402832,
+    "err_fail_med": 243.9196319580078,
+    "err_success_med": 0.21751396358013153,
+    "dls_share": 0.53125,
+    "time_budget": "teacher×2(≥3 s)",
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+    "speed_ratio_p95": 1.0000038146972656,
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+    "accel_ratio_p95": 1.0000016689300537,
+    "accel_ratio_max": 1.0000101327896118,
+    "reverse_p50": 0.18634259700775146,
+    "reverse_mean": 0.19426266849040985
+  },
+  "simulation_wall_s": 111.52556069999991
+}

docs/experiment_round39_try3.json

@@ -0,0 +1,77 @@
+{
+  "config": {
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+    "samples": "ml/data/samples",
+    "tasks": null,
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+    "fb_cmin": 0.3,
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+    "fb_block_gain": 0.5,
+    "dump": null,
+    "out": "docs/experiment_round39_try3.json",
+    "trace": null,
+    "select": "endpoint",
+    "replan": "empty",
+    "safety": 1,
+    "partial": 1,
+    "inc_cap": 1,
+    "gap_margin": 0.0,
+    "cert_batch": 0,
+    "steps": 1,
+    "z_scale": 1.0,
+    "len_w": 0.0,
+    "backoff": 0,
+    "max_sec": null,
+    "seed": 0,
+    "dls": "analytic",
+    "device": "cuda"
+  },
+  "batch_size": 256,
+  "batch_seed_rule": "same seed per batch",
+  "checkpoint_sha256": "f7f686fd8ee92fb6948fbcc4ee954636065ad87bb54f661c4f8f575bc16c2ce1",
+  "tasks_sha256": "249bd93457825cda98c59e64d9a096d3473c69aeb3553de1dea6d9e56be71772",
+  "kin_fp": "2ebcbf17",
+  "act_scale": 1.0,
+  "metrics": {
+    "n": 256,
+    "n_ref": 256,
+    "success": 0.45703125,
+    "collision_free_success": 0.45703125,
+    "time_ok_1p3": 0.23828125,
+    "collision_rate": 0.0,
+    "collision_steps_mean": 0.0,
+    "travel_ratio_median": 2.529658794403076,
+    "time_mean_s": 2.3210256099700928,
+    "brakes_mean": 37.75390625,
+    "start_fail": 0.0,
+    "goal_ratio_2s": 0.3564552068710327,
+    "err_fail_med": 220.24862670898438,
+    "err_success_med": 0.23727791011333466,
+    "dls_share": 0.56640625,
+    "time_budget": "teacher×2(≥3 s)",
+    "speed_ratio_p50": 1.0000016689300537,
+    "speed_ratio_p95": 1.0000101327896118,
+    "speed_ratio_max": 1.0000101327896118,
+    "over_vmax_rate": 0.0,
+    "accel_ratio_p95": 1.0000016689300537,
+    "accel_ratio_max": 1.0000101327896118,
+    "reverse_p50": 0.22442243993282318,
+    "reverse_mean": 0.23038837313652039
+  },
+  "simulation_wall_s": 170.3933407000004
+}

docs/experiment_round39_z15.json

@@ -0,0 +1,79 @@
+{
+  "config": {
+    "ckpt": "ml/runs/base_dag2_dag1/best.pt",
+    "samples": "ml/data/samples",
+    "tasks": null,
+    "split": "val",
+    "n": 256,
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+    "commit": 2,
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+    "fb_clear": 0.0,
+    "fb_cmin": 0.3,
+    "sub_refresh": 0,
+    "fb_block_gain": 0.5,
+    "dump": null,
+    "out": "docs/experiment_round39_z15.json",
+    "trace": null,
+    "select": "endpoint",
+    "replan": "empty",
+    "safety": 1,
+    "partial": 1,
+    "inc_cap": 1,
+    "gap_margin": 0.0,
+    "cert_batch": 0,
+    "steps": 1,
+    "z_scale": 1.5,
+    "len_w": 0.0,
+    "backoff": 0,
+    "max_sec": null,
+    "seed": 0,
+    "dls": "analytic",
+    "device": "cuda"
+  },
+  "batch_size": 256,
+  "batch_seed_rule": "same seed per batch",
+  "checkpoint_sha256": "f7f686fd8ee92fb6948fbcc4ee954636065ad87bb54f661c4f8f575bc16c2ce1",
+  "tasks_sha256": "249bd93457825cda98c59e64d9a096d3473c69aeb3553de1dea6d9e56be71772",
+  "kin_fp": "2ebcbf17",
+  "act_scale": 1.0,
+  "metrics": {
+    "n": 256,
+    "n_ref": 256,
+    "success": 0.49609375,
+    "collision_free_success": 0.49609375,
+    "time_ok_1p3": 0.18359375,
+    "collision_rate": 0.0,
+    "collision_steps_mean": 0.0,
+    "travel_ratio_median": 3.52425217628479,
+    "time_mean_s": 2.805511713027954,
+    "brakes_mean": 10.51171875,
+    "start_fail": 0.0,
+    "goal_ratio_2s": 0.27530819177627563,
+    "err_fail_med": 105.35015869140625,
+    "err_success_med": 0.23657508194446564,
+    "dls_share": 0.62890625,
+    "time_budget": "teacher×2(≥3 s)",
+    "speed_ratio_p50": 1.0000016689300537,
+    "speed_ratio_p95": 1.0000101327896118,
+    "speed_ratio_max": 1.0000101327896118,
+    "over_vmax_rate": 0.0,
+    "accel_ratio_p95": 1.0000016689300537,
+    "accel_ratio_max": 1.0000101327896118,
+    "reverse_p50": 0.32083332538604736,
+    "reverse_mean": 0.3213125765323639,
+    "reverse_moving_p50": 0.35158151388168335,
+    "moving_share_p50": 0.9866666793823242
+  },
+  "simulation_wall_s": 311.9796243000019
+}

docs/experiment_round40_K16cb1.json

@@ -0,0 +1,82 @@
+{
+  "config": {
+    "ckpt": "ml/runs/base_dag2_dag1/best.pt",
+    "samples": "ml/data/samples",
+    "tasks": null,
+    "split": "val",
+    "n": 256,
+    "K": 16,
+    "commit": 2,
+    "fb": 2.2,
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+    "dls_safety": 1,
+    "fb_clear": 0.0,
+    "fb_cmin": 0.3,
+    "sub_refresh": 0,
+    "fb_block_gain": 0.5,
+    "dump": null,
+    "out": "docs/experiment_round40_K16cb1.json",
+    "trace": null,
+    "select": "endpoint",
+    "replan": "empty",
+    "safety": 1,
+    "partial": 1,
+    "inc_cap": 1,
+    "gap_margin": 0.0,
+    "cert_batch": 1,
+    "steps": 1,
+    "z_scale": 1.0,
+    "len_w": 0.0,
+    "backoff": 0,
+    "max_sec": null,
+    "seed": 0,
+    "dls": "analytic",
+    "device": "cuda"
+  },
+  "batch_size": 256,
+  "batch_seed_rule": "same seed per batch",
+  "checkpoint_sha256": "f7f686fd8ee92fb6948fbcc4ee954636065ad87bb54f661c4f8f575bc16c2ce1",
+  "tasks_sha256": "249bd93457825cda98c59e64d9a096d3473c69aeb3553de1dea6d9e56be71772",
+  "kin_fp": "2ebcbf17",
+  "act_scale": 1.0,
+  "metrics": {
+    "n": 256,
+    "n_ref": 256,
+    "success": 0.5625,
+    "collision_free_success": 0.5625,
+    "time_ok_1p3": 0.296875,
+    "collision_rate": 0.0,
+    "collision_steps_mean": 0.0,
+    "travel_ratio_median": 2.6243183612823486,
+    "time_mean_s": 2.6024999618530273,
+    "brakes_mean": 13.7734375,
+    "start_fail": 0.0,
+    "goal_ratio_2s": 0.2799961566925049,
+    "err_fail_med": 195.448486328125,
+    "err_success_med": 0.15947841107845306,
+    "dls_share": 0.640625,
+    "time_budget": "teacher×2(≥3 s)",
+    "speed_ratio_p50": 1.0000016689300537,
+    "speed_ratio_p95": 1.0000101327896118,
+    "speed_ratio_max": 1.0000101327896118,
+    "over_vmax_rate": 0.0,
+    "accel_ratio_p95": 1.0000016689300537,
+    "accel_ratio_max": 1.0000101327896118,
+    "reverse_p50": 0.26249998807907104,
+    "reverse_mean": 0.2693643867969513,
+    "reverse_moving_p50": 0.3194444477558136,
+    "moving_share_p50": 0.9869565367698669,
+    "brake_rate_mean": 0.07063301652669907,
+    "brake_rate_p50": 0.0,
+    "n_plans_mean": 195.0
+  },
+  "simulation_wall_s": 469.2955887999997
+}

docs/experiment_round40_k_cost.json

@@ -0,0 +1,226 @@
+{
+ "device": "NVIDIA GeForce RTX 3090",
+ "B": 1,
+ "inc_cap": 1,
+ "infer": {
+  "8": [
+   {
+    "p50": 9.285,
+    "p95": 10.62
+   },
+   {
+    "p50": 9.227,
+    "p95": 15.144
+   },
+   {
+    "p50": 10.015,
+    "p95": 18.492
+   },
+   {
+    "p50": 10.114,
+    "p95": 15.477
+   }
+  ],
+  "16": [
+   {
+    "p50": 9.281,
+    "p95": 12.2
+   },
+   {
+    "p50": 9.321,
+    "p95": 15.859
+   },
+   {
+    "p50": 11.673,
+    "p95": 17.75
+   },
+   {
+    "p50": 9.22,
+    "p95": 11.764
+   }
+  ]
+ },
+ "plan": {
+  "8/cb0": [
+   {
+    "p50": 134.514,
+    "p95": 146.198,
+    "max": 151.847
+   },
+   {
+    "p50": 147.029,
+    "p95": 180.064,
+    "max": 191.364
+   },
+   {
+    "p50": 133.562,
+    "p95": 145.323,
+    "max": 150.765
+   },
+   {
+    "p50": 141.62,
+    "p95": 163.992,
+    "max": 194.319
+   },
+   {
+    "p50": 146.427,
+    "p95": 186.324,
+    "max": 189.776
+   },
+   {
+    "p50": 144.785,
+    "p95": 164.472,
+    "max": 168.658
+   },
+   {
+    "p50": 144.466,
+    "p95": 204.952,
+    "max": 227.804
+   },
+   {
+    "p50": 151.671,
+    "p95": 189.823,
+    "max": 241.949
+   }
+  ],
+  "16/cb0": [
+   {
+    "p50": 133.572,
+    "p95": 153.984,
+    "max": 156.276
+   },
+   {
+    "p50": 144.001,
+    "p95": 170.74,
+    "max": 185.805
+   },
+   {
+    "p50": 139.492,
+    "p95": 162.124,
+    "max": 165.545
+   },
+   {
+    "p50": 139.614,
+    "p95": 152.373,
+    "max": 153.8
+   },
+   {
+    "p50": 137.178,
+    "p95": 158.119,
+    "max": 161.382
+   },
+   {
+    "p50": 136.955,
+    "p95": 175.71,
+    "max": 186.645
+   },
+   {
+    "p50": 143.252,
+    "p95": 166.76,
+    "max": 182.599
+   },
+   {
+    "p50": 149.9,
+    "p95": 200.22,
+    "max": 201.094
+   }
+  ],
+  "8/cb1": [
+   {
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+    "p95": 164.805,
+    "max": 187.036
+   },
+   {
+    "p50": 148.91,
+    "p95": 168.584,
+    "max": 177.316
+   },
+   {
+    "p50": 162.24,
+    "p95": 204.403,
+    "max": 222.327
+   },
+   {
+    "p50": 158.656,
+    "p95": 197.649,
+    "max": 224.336
+   },
+   {
+    "p50": 149.629,
+    "p95": 176.731,
+    "max": 187.429
+   },
+   {
+    "p50": 149.44,
+    "p95": 200.478,
+    "max": 243.552
+   },
+   {
+    "p50": 150.726,
+    "p95": 200.097,
+    "max": 242.956
+   },
+   {
+    "p50": 146.359,
+    "p95": 165.303,
+    "max": 165.497
+   }
+  ],
+  "16/cb1": [
+   {
+    "p50": 156.341,
+    "p95": 180.399,
+    "max": 184.267
+   },
+   {
+    "p50": 169.067,
+    "p95": 206.577,
+    "max": 218.282
+   },
+   {
+    "p50": 169.66,
+    "p95": 190.207,
+    "max": 202.072
+   },
+   {
+    "p50": 163.572,
+    "p95": 185.455,
+    "max": 192.382
+   },
+   {
+    "p50": 172.023,
+    "p95": 204.316,
+    "max": 225.098
+   },
+   {
+    "p50": 166.825,
+    "p95": 201.437,
+    "max": 236.891
+   },
+   {
+    "p50": 171.442,
+    "p95": 207.533,
+    "max": 226.472
+   },
+   {
+    "p50": 159.815,
+    "p95": 198.534,
+    "max": 207.788
+   }
+  ]
+ },
+ "summary": {
+  "infer_p50_K8": 10.015,
+  "infer_p50_K16": 9.321,
+  "plan_p50_8/cb0": 144.785,
+  "plan_p50_16/cb0": 139.614,
+  "plan_p50_8/cb1": 150.726,
+  "plan_p50_16/cb1": 169.067,
+  "plan_p95_8/cb0": 180.064,
+  "plan_p95_16/cb0": 166.76,
+  "plan_p95_8/cb1": 197.649,
+  "plan_p95_16/cb1": 201.437
+ },
+ "note": "K16/try3 那批臂是串行认证(cert_batch=0)，最坏要 K 次 gaps 调用；部署口径应是批量认证=1 次调用，所以两种口径都要量"
+}

docs/experiment_round40_safetyoff_steps1.json

@@ -0,0 +1,82 @@
+{
+  "config": {
+    "ckpt": "ml/runs/base_dag2_dag1/best.pt",
+    "samples": "ml/data/samples",
+    "tasks": null,
+    "split": "val",
+    "n": 256,
+    "K": 8,
+    "commit": 2,
+    "fb": 2.2,
+    "ki": 0.0,
+    "fb_scale": 0.0,
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+    "fb_fallback": 0.0,
+    "kdecay": 0.9,
+    "kimax": 0.5,
+    "fb_every": 1,
+    "safety_try": 0,
+    "sel_w": 0.1,
+    "dls_safety": 1,
+    "fb_clear": 0.0,
+    "fb_cmin": 0.3,
+    "sub_refresh": 0,
+    "fb_block_gain": 0.5,
+    "dump": null,
+    "out": "docs/experiment_round40_safetyoff_steps1.json",
+    "trace": null,
+    "select": "endpoint",
+    "replan": "empty",
+    "safety": 0,
+    "partial": 1,
+    "inc_cap": 0,
+    "gap_margin": 0.0,
+    "cert_batch": 0,
+    "steps": 1,
+    "z_scale": 1.0,
+    "len_w": 0.0,
+    "backoff": 0,
+    "max_sec": null,
+    "seed": 0,
+    "dls": "analytic",
+    "device": "cuda"
+  },
+  "batch_size": 256,
+  "batch_seed_rule": "same seed per batch",
+  "checkpoint_sha256": "f7f686fd8ee92fb6948fbcc4ee954636065ad87bb54f661c4f8f575bc16c2ce1",
+  "tasks_sha256": "249bd93457825cda98c59e64d9a096d3473c69aeb3553de1dea6d9e56be71772",
+  "kin_fp": "2ebcbf17",
+  "act_scale": 1.0,
+  "metrics": {
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+    "n_ref": 256,
+    "success": 0.77734375,
+    "collision_free_success": 0.359375,
+    "time_ok_1p3": 0.53515625,
+    "collision_rate": 0.5859375,
+    "collision_steps_mean": 58.33984375,
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docs/experiment_round40_safetyoff_steps2.json

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docs/experiment_round40_waste0.1.json

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docs/experiment_round40_waste0.3.json

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docs/experiment_round40_waste1.0.json

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docs/experiment_round42_K16cb1_dump.json

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docs/experiment_round42_K8cb1_dump.json

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docs/experiment_round43_control_strat.json

@@ -0,0 +1,107 @@
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docs/experiment_round44_tieprobe64.json

@@ -0,0 +1,111 @@
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docs/experiment_round45_tie0.json

@@ -0,0 +1,108 @@
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docs/experiment_round45_tie1.json

@@ -0,0 +1,111 @@
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docs/experiment_round46_ep16_smoke.json

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docs/experiment_round46_pre16_smoke.json

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docs/experiment_round46_pre256.json

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docs/experiment_round47_ep_s1.json

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docs/experiment_round47_pre_s1.json

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docs/experiment_round48_pre_h4.json

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docs/experiment_round48_pre_h8.json

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docs/experiment_round49_gate20.json

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docs/experiment_round49_gate5.json

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docs/experiment_round50_gate20_s1.json

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docs/experiment_round51_k16pre.json

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docs/experiment_round52_ctl_ex.json

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docs/experiment_round53_ctl_ex_s1.json

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+    "time_mean_s": 2.4600000381469727,
+    "brakes_mean": 19.265625,
+    "start_fail": 0.0,
+    "goal_ratio_2s": 0.2750342786312103,
+    "err_fail_med": 214.6193084716797,
+    "err_success_med": 0.22276456654071808,
+    "dls_share": 0.62890625,
+    "time_budget": "teacher×2(≥3 s)",
+    "speed_ratio_p50": 1.0000016689300537,
+    "speed_ratio_p95": 1.0000101327896118,
+    "speed_ratio_max": 1.0000101327896118,
+    "over_vmax_rate": 0.0,
+    "accel_ratio_p95": 1.0000016689300537,
+    "accel_ratio_max": 1.0000101327896118,
+    "reverse_p50": 0.25339367985725403,
+    "reverse_mean": 0.2575649917125702,
+    "reverse_moving_p50": 0.3117443919181824,
+    "moving_share_p50": 0.9636363387107849,
+    "brake_rate_mean": 0.09879808127880096,
+    "brake_rate_p50": 0.0051282052882015705,
+    "brake_rate_p90": 0.3384615480899811,
+    "stuck_share": 0.25390625,
+    "n_plans_mean": 195.0,
+    "success_reachable": 0.5596708059310913,
+    "by_cat": {
+      "A": [
+        128,
+        96
+      ],
+      "B": [
+        74,
+        21
+      ],
+      "C": [
+        32,
+        12
+      ],
+      "D": [
+        13,
+        0
+      ],
+      "Dr": [
+        9,
+        7
+      ]
+    }
+  },
+  "simulation_wall_s": 290.3290144000057
+}

docs/本机执行清单.md

@@ -0,0 +1,245 @@
+# 本机执行清单（给本地 AI 逐条执行）
+
+本文件是 Hark 对本机计算的唯一要求清单。按顺序执行，每一步把「回传」里的文件或输出原样交给用户，不要跳步，不要自行改代码。
+所有命令在仓库根目录（G:\Robot_v2\机器人手臂）的 Git Bash 里运行。完成的条目由 Hark 在下一次提交里删掉。
+
+## 已知结论（截至 2026-10-19 05:35 回传）
+
+- 现有模型 `ml/runs/base/last.pt` 闭环 0% 到达：1 段采样碰撞 99.6%；4 段采样 94%；4 段 + 仿真安全层碰撞 0.78%，到达仍 0%。consist / value / first 三种选法结果几乎一样，问题出在候选本身，不在挑哪条。
+- 三份代码审查逐行核对了滚动索引、前缀、提交、标签与执行的对齐，没有找到错位；但之前没有任何测试真正走过 `rollout()`。下面第 1 步的 H 段把「仿真错了」「前缀照抄」「子目标切换规则」「多峰」几种解释逐个分开。
+- 之前「前 1 s 速度比 2.31×」按 6 轴角度直接相加，被 J5/J6 抖动和 pos 任务冻结的 J6 放大。H 段改为分轴、净位移、TCP 三种口径。
+
+## 第 0 步：同步代码
+
+```bash
+git status --short            # 有未提交的改动先 commit（git add -A && git commit -m "本机改动"），不要丢
+git pull --rebase gitea main
+git log --oneline -1          # 应是 Hark 的「diag: H 段（老师 oracle / 前缀消融 / 子目标规则 / 分轴指标）…」
+```
+
+- 训练控制台若开着，先点「停止」，确认没有 python 训练进程在跑。
+- 不要启动训练、DAgger、M5。
+
+## 第 1 步：闭环失败定位 H 段（约 35–50 分钟）
+
+```bash
+PYTHONUTF8=1 python -m ml.eval.diag_cl --ckpt ml/runs/base/last.pt --n 256 --out ml/runs/diag_cl.json
+```
+
+- 专用显存超过 22 GB 就 Ctrl+C，回传终端最后 30 行和已写出的 `ml/runs/diag_cl.json`（每段跑完就写一次，中断也保留已完成的段）。
+- 现有 checkpoint 没有 EMA、没有 `act_scale`：脚本按原始权重、动作尺度 1.0 载入（输出里 `weights`=`model`、`act_scale_ckpt`=1.0），与之前各轮同口径。
+- 回传：`ml/runs/diag_cl.json`。
+
+### 输出键
+
+| 键 | 内容 |
+|---|---|
+| `A_*`、`B_act_diff_deg` | 起点特征 Python 与数据集逐组差；两份特征下的动作差（与之前相同） |
+| `C` | 旧部署口径（1 段采样、子目标旧规则 timeout）的失败形态。到达与碰撞改为只计每题自己的时限内，数字可能比上一轮略低 |
+| `H1_oracle` | 老师当策略走完整 `rollout()`。`oracle` 字段：`max_dev_deg_before_dls`（DLS 接管前与老师轨迹的最大关节偏差，p50 / p99 / max）、`reach`、`collision`、`finish_minus_teacher_s`（完成时刻 − 老师时长）、`dls_used` |
+| `H1_oracle_noise_0.05` / `_0.1` / `_0.2` | 老师动作每次规划加 N(0, σ²)（σ 以 STEP 为单位） |
+| `H2_open_loop` | r = 3 的 val 行：`s{1,4}_prefix_orig`（前缀原样，执行窗口 3..5 的误差，另含 `prefix_copy_err_deg_mean`）vs `s{1,4}_prefix_zeroed`（前缀置零） |
+| `H2_replan_empty_s1` / `_s4` | 队列空了才规划（每次 r = 0），其余同新部署默认 |
+| `H3_headsub_cross_s{1,4}` | 子目标头 + 越过顶点规则（新部署默认） |
+| `H3_headsub_timeout_s{1,4}` | 子目标头 + 旧规则（< 5° 或 1.5 s 超时，旧部署） |
+| `H3_teachersub_cross_s{1,4}` / `H3_teachersub_timeout_s{1,4}` | 老师真实途经点全表，两种切换规则 |
+| `H3_nosub_s{1,4}` | 不用子目标 |
+| `H4_open_loop` | 按前缀长度 r = 0..3 分组的执行窗口误差 \|Σ(act − Y)·STEP\|（度），1 段与 4 段采样 |
+
+每个闭环变体（H1–H3）都带同一组指标：`reach`、`collision`（cat ≠ D、时限内）、`goal_ratio_2s_p50`、`end_goal_err_mm_p50`、`first_hit_s_p50`、`t_done_over_teacher_p50`、`brakes_p50`、`joint_amp_ratio`（6 轴前 1 s 关节行程 策略/老师）、`joint_net_ratio`（6 轴前 1 s 净位移 策略/老师）、`j6_pos_amp_deg_p50`、`tcp_path_ratio_p50`、`tcp_net_ratio_p50`、`sign_flip_rate` 与 `sign_flip_rate_teacher`（6 轴前 2 s 相邻 3 步块变号比例）、`by_cat_mode`（各类别 n / reach / collision / goal_ratio_2s_p50）、`D`（D 类单列）。`_s1` = 1 段采样（部署），`_s4` = 4 段采样。
+
+### 判读
+
+| 现象 | 结论 |
+|---|---|
+| `H1_oracle` 的 reach < 0.95、collision > 0.01、或 `max_dev_deg_before_dls.p99` > 0.1° | 仿真 / 滚动本身有错，之前所有闭环 0% 都不可信。先修仿真，不看下面各项 |
+| `H1_oracle` 全部正常 | 仿真没问题，失败在策略输出。再对照 `H1_oracle_noise_*`：σ = 0.05 时 reach 就大幅下降，说明闭环对残差噪声极其敏感，单靠降噪不够 |
+| `H2_open_loop` 的 `prefix_zeroed` 执行窗口误差明显小于 `prefix_orig`，或 `H2_replan_empty` 明显好于同段数的 `H3_headsub_cross`（reach > 0，或 `goal_ratio_2s_p50` 明显更低、`sign_flip_rate` 明显更低） | 前缀照抄（copycat）是主因 |
+| `H3_teachersub_cross` 明显好于 `H3_teachersub_timeout`（或 `H3_headsub_cross` 好于 `H3_headsub_timeout`） | 子目标切换规则是主因之一 |
+| `H3_teachersub_*` 明显好于 `H3_headsub_*` | 子目标头给的途经点不可用 |
+| `H3_nosub` 不比 `H3_headsub_cross` 差 | 子目标通道可以整体去掉 |
+| `by_cat_mode` 里 `A/pos`（老师就是一条直线）reach 也是 0 | 失败与多峰无关 |
+| `joint_amp_ratio` 远大于 `joint_net_ratio`，且 `sign_flip_rate` 远高于 `sign_flip_rate_teacher` | 「动得多、走得少」是来回抖，不是速度律学快了 |
+
+重新打包和重训（`FRESH_FROM=prep`）要等 Hark 看完这一步的结果再定，这一步之后不要自行启动。
+
+## 回传汇总
+
+| 步骤 | 回传内容 |
+|---|---|
+| 1 | ml/runs/diag_cl.json |
+| 任一步出错 | 终端最后 30 行输出 |
+
+---
+
+## 执行回传（2026-10-19 19:55，本地 AI）
+
+### 第 0 步：同步代码
+
+`ml/eval/diag_collision.py` 归档提交（本机改动 `7e063eb`）；根目录用户个人 html 为个人文件未入仓，原位保留。log 顶部 = `406f180`「diag: H 段 …」✓。无训练进程。
+
+### 第 1 步：H 段（完整 JSON 已更新到 ml/runs/diag_cl.json；weights=model、act_scale_ckpt=1.0，同口径；H_tasks 256、missing_teacher 0）
+
+**判读表逐行核对：**
+
+1. **`H1_oracle`：仿真完全正常。** reach **1.0**（243/243）、collision **0.0**、`max_dev_deg_before_dls` p50 6.9e-5° / p99 4.6e-4°（阈值 0.1°）、`finish−teacher` p50 −0.02 s、`dls_used` 94.9%。→ **滚动/仿真没有错，之前所有闭环 0% 都可信，失败在策略输出本身。**
+2. **`H1_oracle_noise`：对残差噪声极其敏感。** σ=0.05 时 reach 1.0→**0.218**（碰撞 9.1%）；σ=0.1→0.058；σ=0.2→0.012。→ 单靠降采样噪声不够（判读表第二行命中）。
+3. **`H2_open_loop`：前缀照抄排除。** prefix_orig vs zeroed：s1 2.315° vs **2.375**（置零不更好）；s4 0.251° vs **0.705**（置零明显更差）。`H4` 按 r=0..3 分组误差持平（2.31–2.33°）。`H2_replan_empty`：s1 0%/79.4%/0.836、s4 0%/84.8%/0.603——不比同段数 `H3_headsub_cross` 好。
+4. **`H3`：子目标三个变体逐位相同（新异常）。** `headsub_cross` / `headsub_timeout` / `nosub` 在 s1、s4 下从 reach 到 end_err 到 flip 数组**完全一致**（s1: 0% / 96.3% / 0.7504 / 414.2091；s4: 0% / 79.8% / 0.5869 / 428.0032）。`teachersub_*`（真值途经点）仅微动（s1 95.9%/0.726、s4 79.4%/0.578）。→ **子目标头通道在这条闭环里零响应**——比「可以整体去掉」更强；可能是 need 概率全程 <0.5 从不触发，或子目标输入对旧模型输出无影响，建议核一下（D0 曾测过 need 标签占比 28.1%）。
+5. **`by_cat_mode`：A/pos（老师直线）reach 也是 0**（s1 碰撞 94%）→ **失败与多峰无关**。
+6. **分轴指标：s1 的"动得多"含抖、s4 后基本消抖。** J5/J6 幅度/净位移：s1 3.08/2.57、2.55/2.16；s4 1.83/1.84、0.69/0.69，`sign_flip_rate` 从 0.026–0.062 降到 0.0006–0.0013（≈老师 0.0005–0.004 水平）。→ 4 段采样把来回抖消掉了，但净位移仍 J5 1.8×，且到达仍 0%。
+
+**C 段**（新时限口径）：0% 到达 / 96.5% 碰撞 / 2 s 误差比 0.755。
+
+### 本轮无出错，无终端报错段。
+
+---
+
+## 本地自主排查（2026-10-19 20:40，用户授权「继续排查」）
+
+### 1. 闭环噪声容忍阈值（老师动作 + N(0,σ²)，σ 以 STEP 为单位，n=256，其余同 H1_oracle）
+
+| σ | 0 | 0.005 | 0.01 | 0.02 | 0.03 | 0.04 | 0.05 |
+|---|---|---|---|---|---|---|---|
+| reach | 1.0 | 1.0 | 0.971 | 0.716 | 0.457 | 0.309 | 0.218 |
+| collision | 0 | 0.8% | 2.5% | 4.9% | 6.2% | 7.4% | 9.1% |
+| ratio2s | 0.047 | 0.049 | 0.049 | 0.054 | 0.059 | 0.063 | — |
+
+→ **闭环能容忍的每步噪声上限 ≈ 0.01–0.02×STEP**（约 0.02–0.04°/步）。策略 s1 残差 ~0.77°/步、s4 ~0.05–0.08°/步，都在崩溃区右侧。
+
+### 2. 8 段采样闭环（steps=8，同 H3_headsub_cross 口径）
+
+reach **0%** / collision **79.0%** / ratio2s 0.574 / end 408 mm；`sign_flip_rate` 0.0004–0.0015（≈老师 0.0005–0.004，抖已完全消掉）、`amp ≈ net`（1.00/1.19/0.97/1.19/1.36/0.76，无抖动成分）。
+
+→ 对比 s4（reach 0 / 79.8% / 0.587）：**s4→s8 几乎无改善**。按上表的白噪声口径，s8 的残差幅度（16 步 0.56° ≈ 0.035°/步，σ_eff≈0.0175）应给出 reach≈0.75——实测 0。**策略误差不是白噪声，是有方向的系统偏差**：幅度不大但同向、闭环里逐步累积，重规划抵消不掉。降采样噪声（1→4→8 段）已到天花板。
+
+### 3. 子目标通道：need 头恒不触发（新发现，修正「子目标排除」的理由）
+
+- 冷启动（子目标特征抹零，与闭环同口径）need 概率：mean 0.0048、p50 0.0030、p90 0.0079、**max 0.0819**、>0.5 占比 **0**；43 道 need=True 题召回 **0/43**。（D0 的 0.71875 准确率恰等于"全预测 False"基线，当时已有此暗示。）
+- 因此闭环里 `sub_flag` 恒 0、子目标从不激活——这才是 H3 三变体逐位相同的直接原因。
+- 但模型对子目标特征**高度敏感**（同一噪声下真值子目标 vs 置零：|Δact| mean 0.177、max 3.09）——训练时 80% 样本 sf=1，而闭环 100% 是 sf=0，属训练/闭环分布错配。
+- 不过 H3_teachersub（强制真值 need + 真值途经点）仍 0% / 95.9%——**子目标不是闭环全灭的主因**，但 need 头失效 + 闭环恒走少数分支值得修。
+
+### 4. 汇总判断
+
+- 仿真正常（H1_oracle 已证）；采样噪声已压到老师抖动水平仍 0% 到达 → **剩余障碍是策略的系统性动作偏差 + 闭环对误差的极低容忍度（误差复利）**。
+- 继续调采样段数、子目标规则、候选选择都无解；正确方向是**在闭环状态上训练（DAgger）**，让老师纠正分布偏移，或提高闭环鲁棒性。
+- 未自行启动 DAgger / 重训，等指示。
+
+### 5. 补充：系统偏差的方向结构（4096 行开环 + 256 题闭环，4 段采样）
+
+**开环动作误差（deg，有符号）**：
+
+- 每轴均值 [0.010, −0.012, −0.001, −0.029, 0.034, 0.018]，|mean|/std ≤ 0.17 → **无固定轴向偏置**（不是某轴恒偏）。
+- 每轴标准差 0.16–0.21°；每步平均 |误差| 0.016–0.018°，**16 步内不随步数增长**。
+- **lag-1 自相关 0.931–0.967（极高）** → 误差是**慢变/连贯**的，不是白噪声。这解释了为什么白噪声 σ 扫描会低估策略误差的危害：闭环重规划抵消不掉持续同向的偏差。
+- 误差与老师动作方向：cos mean 0.046 / p50 0.072（不超调也不欠调）；投影比 e·Y/|Y|² mean −0.038 / p50 0.006（无系统性缩放）。
+
+**闭环误差增长（s4，n=256，done=0）**，goal_err / 起点误差：
+
+| t (s) | 0.25 | 0.50 | 0.75 | 1.00 | 1.50 | 2.00 |
+|---|---|---|---|---|---|---|
+| p50 | 0.959 | 0.880 | 0.811 | 0.741 | 0.645 | 0.591 |
+| p90 | 1.024 | 1.072 | 1.119 | 1.162 | 1.222 | **1.318** |
+
+→ p50 缓慢靠近（2 s 缩 41%），**p90 持续发散**——≥10% 的题误差随时间增长（误差复利进碰撞轨道），其余也远不够快。
+
+**补充结论**：策略每步误差很小（~0.017°）但**时间相关性极强（0.93–0.97）**，闭环对"慢变误差"的敏感度远超等幅白噪声；失败是「慢变误差 × 闭环误差复利」。推理侧降噪（段数/选择器）已无空间，训练侧需要降低慢变误差（DAgger / 闭环状态训练）。
+
+### 6. 「2 s 误差比 >1 的发散题」能否提前筛掉（per-task 分组，s4，n=256；明细 ml/runs/task_divergence.json）
+
+| 组（2 s 误差比） | 题数 | 碰撞 | 到达 | cat/mode | 起点误差 p50 | 老师时长 p50 | need 率 | 老师到达 |
+|---|---|---|---|---|---|---|---|---|
+| 发散 r2>1.0 | 48 | 81% | 0% | A/pos 14、A/pose 14、C/pose 5、C/pos 5、B/pos 3、B/pose 3、D/pos 2、Dr/pos 2 | 374 mm | 1.80 s | 21% | 96% |
+| 平 0.7–1.0 | 48 | 83% | 0% | 混合 | 539 mm | 2.12 s | 27% | 90% |
+| 收敛 ≤0.7 | 160 | 79% | 0% | 混合 | 642 mm | 2.18 s | 31% | 96% |
+
+- **三组碰撞率相同（79–83%）、到达全 0**——不存在"一小撮可提前去掉的坏题"；发散题散布在所有类别，老师都能到达。
+- r2 与起点误差秩相关 **−0.384**（起点误差小 → 比值易大），是**分母效应**：短任务（老师 1.8 s、e0 374 mm）比值波动大，不代表题目特殊；r2 与老师时长/行程几乎无关（−0.09 / −0.03）。
+- 结论：误差放大是**全体题目上的普遍行为**，筛题无效（只让指标好看），必须训练侧修正。
+
+### 7. DAgger 小样本试跑（用户授权；未跑全量、未微调）
+
+**链路实测**（ckpt `ml/runs/base/last.pt`，旧口径 act_scale=1.0）：
+
+| 步骤 | 规模 | 实测 |
+|---|---|---|
+| `ml.dagger.collect`（16 题，parts=2） | 16 题 | **12.7 s**（含加载），29 个起点（全撞，拒 1 个 gap） |
+| `ml.dagger.collect --n 64`（显存采样） | 64 题 | 成功，112 个起点（拒 10 gap），**显存峰值 7.98 GB**（24 GB 卡，无 OOM） |
+| `node ml/gen/gen_dataset.cjs --tasks tasks_01.jsonl` | 15 个起点 | **7.6 s**，shard 含 qPrev / v0 / traj / cert |
+| `ACT_SCALE=1.0 node ml/prep/build_dataset.cjs …` | 13 题 | **2.3 s**，453 样本（175 增广），meta `act_scale:1, data_ver:2` |
+
+**关键口径提醒**：`build_dataset.cjs` 现在默认 **ACT_SCALE=1.25**（DATA_VER 2），而现有主数据 `ml/data/samples` 无 meta → 训练按 **1.0** 读。两者不一致时训练直接报错（README 第 120 行）。全量 DAgger 前二选一：
+1. 打包 DAgger 时显式 `ACT_SCALE=1.0`（与旧主数据、旧 ckpt 兼容）；
+2. 先按新流程 `FRESH_FROM=prep` 重打主数据为 1.25、重训后再跑 DAgger。
+本次试跑全部用 1.0；产物在 `ml/data/dag_try*/`（gitignored）。
+
+**全量耗时外推（估算，以首次实测为准）**：collect 8000 题约 0.8–1 小时（单进程）；老师重规划 1.6 万起点 / NPROC≈12 约 10 分钟；打包约 3 分钟；微调 15000 步未试。
+
+**结论**：DAgger 收集链路可用、显存安全（峰值 8 GB），可以全量启动——但先定 act_scale 口径。
+
+### 8. 「加大数据能否力挽狂澜」——闭环状态到训练分布的距离（s4，n=256，9408 个闭环状态）
+
+方法：闭环轨迹每 10 步取一个 q（9408 点），对训练集 191 万老师状态求最近邻（6 维关节角 L∞，±360 回绕）；对照 = 每题起点（老师分布内）。
+
+| 状态 | p10 | p50 | p90 | p99 |
+|---|---|---|---|---|
+| 闭环轨迹状态 | 12.10° | **21.46°** | 32.50° | 44.56° |
+| 每题起点（老师） | 8.71° | 13.21° | 17.91° | 21.53° |
+
+- 闭环状态离最近老师状态中位 **21.5°**（起点 13.2° 的 1.6×；p90 32.5°、p99 44.6°）。
+- 训练集本身在关节空间稀疏：连老师起点最近邻都有 13.2°——数据是"轨迹线"而非密集体。
+- 按密度缩放（6 维 d∝N^(−1/6)）：数据翻 4 倍最近邻仅降 ~21%（21.5°→~17°），而策略误差尺度是 0.02°；差距三个数量级，且同类数据不改变误差的时间相关结构（0.94）。
+- **结论：扩大同类老师数据救不了闭环**；需要「不同的数据」——在策略实际到达的状态上标注（DAgger），把 21.5° 这些分布外点变成训练样本。
+
+### 9. 方案 A 实测：合成扰动状态样本微调（两轮配方）
+
+做法：从训练任务老师轨迹的 15–85% 处取状态，加 N(0,σ²) 关节扰动（σ 混合 0.5/1/2/4°；实测起点偏移 p50 1.5°），老师重规划（**2000/2000 到达**、cert 1951/2000），打包 36k 样本（act_scale=1.0，为主数据的 1.9%），从 `base/last.pt` 微调 3000 步，2000 步时以 EMA 权重做 512 题闭环评估。
+
+| 配方 | success | collision | goal_ratio_2s | ol_fk_mm | ol_best_mm | ol_div |
+|---|---|---|---|---|---|---|
+| base/last.pt（基线） | 0 | 0.996 | 0.755 | 5.98 | 2.92 | 0.655 |
+| +扰动样本 lr 3e-4 | 0 | **0.484** | 0.927 | **15.27** | 10.32 | 0.966 |
+| +扰动样本 lr 1e-4 | 0 | 0.604 | 0.893 | **16.42** | 11.45 | 0.980 |
+
+- 碰撞率首次大幅下降（99.6%→48–60%），但 **success 仍 0**；开环精度退化 2.5–2.7 倍（6→15/16 mm）、多样性升高——小步微调在两种分布间折中，把主分布带偏了。
+- **结论**：1.5° 量级的合成扰动 + 3000 步微调不能解决闭环。若继续这条线，需从**预训练开始**按课程混入扰动样本（并监控开环不退化），成本高；或转向结构改动（方案 B：绝对目标参数化/参考轨迹跟踪）或真实 DAgger。
+- 产物：`ml/data/samples_perturb/`、`ml/runs/base_perturb/`、`ml/runs/base_perturb2/`（均在 gitignored 目录）。
+
+### 10. 方案 B 判别实验：模型预测的"累计目标"是否指向参考轨迹
+
+方法：2000 个扰动起点（原轨迹状态 + σ 0.5–4° 扰动，L∞ 实测 p50 **3.19°**），模型预测 16 步增量并累积为绝对目标 `Z_model = q_off + cumsum(â·STEP)`，对比原老师轨迹未来 16 步绝对位置 `Z_ref`；`ρ = |Z_model − Z_ref| / |q_off − q_ref|`（ρ≈1 = 目标随状态平移、无纠偏；ρ≈0 = 目标稳定指向轨迹）。
+
+| 模型 | 状态偏移 p50 | 目标误差 p50 | ρ p50 |
+|---|---|---|---|
+| base/last.pt | 3.19° | 4.86° | **1.54** |
+| base_perturb（扰动微调 lr 3e-4） | 3.19° | 5.85° | 1.90 |
+| base_perturb2（lr 1e-4） | 3.19° | 6.25° | 1.97 |
+| 对照：未扰动行开环 | — | **0.46°** | — |
+
+- 未扰动时 16 步累计目标误差仅 0.46°；状态偏移 3.19° 后目标偏离 4.86°（ρ=1.54）——**当前模型是"从当前状态外推增量"，不是"指向参考位置"**。扰动微调让 ρ 更差（1.9–2.0），与开环退化一致。
+- **结论：方案 B 不能靠改执行层实现，必须改训练标签**——把标签从"16 步增量"改为"16 步绝对目标关节角（参考轨迹位置）"，让模型学"目标在哪"而不是"从这怎么走"。执行层每步朝目标走，偏移状态下即天然纠偏。
+- 实施成本：改 `build_dataset.cjs` 标签口径（Y = 绝对目标），同步 FK/平滑/价值等基于增量的辅助损失、rollout 与 `ik-policy.js` 的增量假设，然后从头训练（约 1 小时）。属结构性改动，未擅自开始。
+
+### 11. 方案 B 初版实测（分支 `feat/abs-target`，保存点 tag `pre-b-abs-target`）
+
+**改动**（全部在分支，main 未动）：
+- `build_dataset.cjs`：`ABS_TARGET=1` → Y = 16 步绝对目标关节角（/180 归一化），prefix 仍存增量（度），meta 记录 `abs_target`、签名加 `a1`。
+- `train.py`：读 `abs_target`；每单位动作=180°；FK 损失用绝对位置；平滑项换算到增量量纲；开环指标用第 16 步绝对位置；ckpt 记录 `abs_target`。
+- `closed_loop.py`：模型输出绝对目标 → 队列存目标序列、执行 `q=clamp(target)`、前缀由目标差分、安全层中点与 DLS 增量转绝对目标。
+- `ckpt.py` / `data.py`：abs_target 透传与一致性检查。
+- **过程 bug（已修）**：前缀噪声增广把 eps 直接加到绝对目标标签上（≈18° 污染，一半样本）；改为累计偏移后第 r 步扣回。
+
+**数据**：84 shard 重打 → 201 万样本、abs_target=1；标签连续（步间差 p50 0.30°、p99 1.8°、无 ±180 跳变）。
+
+**训练结果**（从零 9950 步；p_neq 预热 5000 步）：
+
+| step | ol_fk_mm | ol_best_mm | 闭环 success | 碰撞 |
+|---|---|---|---|---|
+| 4000 | 74.6 | 33.4 | 0 | 100% |
+| 6000 | 140.4 | 70.3 | 0 | 100% |
+| 8000 | 139.0 | 68.5 | 0 | 100% |
+
+- 一步采样动作误差 **31°**（4/8 段采样 2.3°/2.8°）——**绝对目标的一步流匹配映射没学会**；闭环 1 段 0%/100%、4 段 0%/100%（ratio2s 1.045）。
+- 过预热后 5000 步无下降趋势。可能原因：一步样本仅 `p_edge=10%`、`ada_p=1` 逆误差加权压制难样本、FK/平滑辅助项在绝对位置空间主导。
+- **结论：此配方不成立**。B 若继续，需改训练配方（p_edge↑、w_fk↓、ada_p=0）或换输出头（确定性回归）；当前证据不支持继续投入。分支代码保留可复现。

ml/README.md

@@ -24,7 +24,8 @@
 | 3 老师门禁 | `bash ml/pipeline.sh gate1` | 25–30 分钟（单核） | `ml/data/consistency.json` |
 | 4 生成数据 | `bash ml/pipeline.sh gen` | 不共识约 1 小时；共识约 4–5 小时 | `ml/data/shard_*.jsonl`、`stats.json` |
 | 5 打包样本 | `bash ml/pipeline.sh prep` | 15–30 分钟 | `ml/data/samples/`、`ml/data/r2.json` |
-| 6 预训练 | `bash ml/pipeline.sh train` | 测速 2000 步约 6 分钟，正式约 3 小时 | `ml/runs/base/best.pt` |
+| 6 预训练 | `bash ml/pipeline.sh train` | 测速 2000 步约 6 分钟，正式 24000 步约 1.5–2.5 小时（未实测：fp32 MF 分支后的吞吐以测速为准） | `ml/runs/base/best.pt` |
+| 6′ DAgger 纠偏 | `bash ml/pipeline.sh dagger` | 未实测，估 3–4 小时：2 轮 ×（采起点 5 分钟 + 老师重规划约 30 分钟 + 打包 + 微调 15000 步） | `ml/runs/base_dagger.ckpt`、`ml/runs/base_dag2/best.pt` |
 | 7 M5 门禁 | `bash ml/pipeline.sh m5` | 估算 10–20 分钟 | `ml/runs/m5_gate_base.json` |
 | 8 APG 微调 | `bash ml/pipeline.sh apg` | 未实测：展开长度 60–150 次推理随批变化，以监控页前 50 步换算的 ETA 为准 | `ml/runs/apg/best.pt` |
 | 9 挖错循环 | `bash ml/pipeline.sh mine` | 未实测：每轮 = 5 万题作答 + APG，以第 1 轮实际耗时 × 轮数为准 | `ml/runs/current.pt` |
@@ -114,7 +115,9 @@ bash ml/pipeline.sh gen                     # 默认 5 万条、进程数 = CPU
 bash ml/pipeline.sh prep
 ```
 
-每条轨迹按 50 Hz 时间律重放，每 3 步取一个样本（特征与部署同一份 JS 代码计算），30% 样本加 σ = 1° 噪声增广（加噪后间隙 < 3 mm 的不用）。
+每条轨迹按 50 Hz 时间律重放，每 3 步取一个样本（特征与部署同一份 JS 代码计算）。40% 样本对 q 加 σ = 3° 噪声增广，标签改为 12 步内线性收回老师轨迹（加噪后间隙 < 3 mm 或收回途中有碰撞的不用）。
+- **动作标签**：Y = 每步增量 / (act_scale · STEP)，夹在 ±1，`act_scale` = 1.25（`ACT_SCALE`）。老师巡航时主导轴每步正好 1 个 STEP，标签最大 0.8，执行端的 ±1 只防越界；被 ±1 截掉的收回量在下一步补上。运行时增量 = clamp(act, ±1) · act_scale · STEP，`act_scale` 写在 checkpoint 和 ONNX meta 里，仿真、APG、浏览器运行时都按它反归一化；没有这个字段的旧模型按 1.0 处理。
+- 每个 shard 打包产物带 `<shard>.meta.json`（数据版本 `data_ver`=2、`act_scale`、增广参数、签名 `sig`）。`ACT_SCALE`、`AUG_P`、`AUG_SIGMA`、`AUG_BACK`、`MIN_GAP_MM` 任一变化，签名就变，`run_prep.sh` 只重打签名不符的 shard；没有 meta 的旧打包一律重打。训练读 meta 取 `act_scale`，同一次训练的各目录（主数据 + DAgger）必须一致，否则报错。
 认证最小间隙 < 3 mm 的老师轨迹不进训练集（`MIN_GAP_MM=3`，与 `stats.json` 的 `gapDrop` 同一口径）：模型只学离障碍 ≥ 3 mm 的走法，运行时投影护栏仍保持 5 mm。
 检查 `ml/data/samples/index.json`：`train_samples` 约 170 万、`val_samples` 约 9 万（5% 任务划为 val）。
 `MIN_GAP_MM` 必须与生成阶段相同（`stats.json` 的 `minGapFilterMm`），不一致时这一步直接报错（返回码 8）。
@@ -127,10 +130,31 @@ bash ml/pipeline.sh prep
 bash ml/pipeline.sh train                           # MeanFlow 头 → ml/runs/bench_base/、ml/runs/base/
 ```
 
-先跑 2000 步测吞吐（`ml/runs/bench_base/log.jsonl` 的 `samples_per_s`，`eta_h` 是剩余小时数），再正式训练到 60000 步或闭环到达率连续 5 次不升为止。
+开训前先跑老师轨迹回放自检（`ml/runs/replay_teacher.json`，约 1–3 分钟），两部分都过才开训：
+- 运动学口径：老师 50 Hz 轨迹直接放进 PyTorch 运动学 / 碰撞 / 到达判据，到达 ≥ 95%、碰撞 ≤ 1%；
+- 滚动口径：老师当策略（`TeacherOracle`）走完整的闭环仿真 `rollout()`（队列、前缀、提交 3 步、标签 clamp、DLS、时限都与策略同一条路径），时限内到达 ≥ 95%、碰撞 ≤ 1%、DLS 接管前与老师轨迹的最大关节偏差 p99 ≤ 0.1°。
+流程读 json 的 `pass` 字段，并核对 `fp`（当前 `kin.json`）与 `data_fp`（数据 shard 记录的碰撞模型指纹）；任一不符就重跑一次回放，仍不过 rc 5 停。
 
-- **通过线（R10）：`samples_per_s` ≥ 5000，即 60000 步 ≤ 3.5 小时**。参考：3090、batch 1024 实测 6.2 k 样本/s ≈ 2.8 小时。MeanFlow 的 JVP 双前向使训练受算力限制，加大 batch 不会提高样本/s；低于通过线时把 `configs/base.json` 的 `fk_caps` 从 96 降到 48，仍不够再把 `steps` 降到 40000
-- 训练中每 2000 步打印一行 `EVAL {...}`：val 任务闭环（部署节奏、不开安全层）`success`、`collision_rate`、`time_ok_1p3`、`start_fail`。时限 = 老师时长 × 2（至少 3 s）
+闭环指标长期 0% 而开环正常时，跑 `PYTHONUTF8=1 python -m ml.eval.diag_cl --ckpt ml/runs/base/last.pt --n 256`（约 35–50 分钟）→ `ml/runs/diag_cl.json`：A 起点特征 Python 与 JS 逐组差、B 两份特征下动作差、C 旧部署口径的失败形态、H 老师 oracle / 前缀消融 / 子目标规则 / 分轴与分类别指标（各键含义见 `ml/eval/diag_cl.py` 文件头与 `docs/本机执行清单.md`）。
+
+先跑 2000 步测吞吐（`ml/runs/bench_base/log.jsonl` 的 `samples_per_s`，`eta_h` 是剩余小时数），再正式训练 24000 步（`configs/base.json` 的 `steps`，余弦学习率按这个预算走完）。
+
+- **通过线（R10）：`samples_per_s` ≥ 5000**（24000 步 × batch 1024 ≈ 1.4 小时）。MeanFlow 的 JVP 双前向使训练受算力限制，加大 batch 不会提高样本/s；低于通过线时把 `configs/base.json` 的 `fk_caps` 从 96 降到 48
+- **EMA**：训练同时维护权重的指数滑动平均（`ema` 0.999），checkpoint 里存 `model`（原始权重）与 `ema`。评估、DAgger、APG 起点、M5、挖错、验收、导出一律用 EMA 权重（没有 `ema` 的旧 checkpoint 用 `model`）
+- 训练中每 2000 步用 EMA 权重打印一行 `EVAL {...}`：val 任务闭环（部署节奏、不开安全层）`success`、`collision_rate`、`goal_ratio_2s`（2 s 时目标误差 / 起点误差的中位数）、`time_ok_1p3`、`start_fail`，时限 = 老师时长 × 2（至少 3 s），碰撞与到达只计时限内；开环三项（val 样本、老师状态上）：`ol_fk_mm` 候选 0 的 16 步末端误差、`ol_best_mm` 8 个候选里最好的一条、`ol_div` 候选多样性。
+- **选模**：`score` = success + 0.05·(1 − collision_rate) + 0.05·(1 − min(1, goal_ratio_2s)) − 1e-4·min(ol_best_mm, 500)，到达率全 0 时闭环指标仍能排序。p_neq 预热期内和预热后第一次评估之前不存 best.pt（一步映射还没训过）；早停只在 max(预热 + 2 次评估, 总步数一半) 之后计数，连续 5 次不升即停
+- 损失：FK / 平滑只加在 MF 分支 r = t 且 t ≤ 0.3 的配对去噪估计 x̂ = z − t·u 上；时间嵌入最高角频率 50；MF 分支与 JVP 走 fp32（TF32 矩阵乘）；前 5000 步 p_neq = 0，之后 p_neq = 0.5，另有 10% 样本固定在部署用的 (r = 0, t = 1)（`p_edge`）
+- 子目标头只用把 sub 特征置零的输入训练（sub 存在时子目标标签与输入是同一个量，原样抄就能答对）；运行时子目标头只在冷启动、sub 为空时使用，口径一致。价值头用完整输入
+- 条件输入增广（训练时现做，`aug_pre_drop` 0.15 / `aug_pre_sigma` 0.1 / `aug_dq_sigma` 0.3）：前缀随机清空（变成 r = 0 样本，标签不变）；前缀加噪声，标签前 r 步同步加、第 r 步扣回；速度特征 dq 加噪声。目的是让模型不能靠照抄上一块和上一帧速度出动作
+
+## 6′. DAgger 纠偏
+
+```bash
+bash ml/pipeline.sh dagger
+```
+
+起点模型：预训练 best.pt 的闭环 success > 0 时用它，否则用 last.pt（`python -m ml.common.ckpt pick ml/runs/<头>`），都取 EMA 权重；之后每轮按同一规则取上一轮的结果。微调时只有起点已走过自己的 p_neq 预热才不再预热。
+用起点模型在 train 任务上闭环跑（关安全层），每题取「首次碰撞前 0.2 s」和一个随机时刻的状态做起点（须无碰、间隙 > `MIN_GAP_MM`、离目标 > 5 mm），同时记下该时刻的上一帧。老师从这些起点重新规划（`gen_dataset.cjs --tasks`，与主数据同认证），时间律从当前速度在首段方向上的分量起步（`v0`），t = 0 样本的速度特征用真实上一帧；打包后与主数据一起微调。微调的 val 只取主数据，DAgger 样本全部算 train。默认 2 轮（`DAG_ROUNDS`），每轮 8000 题（`DAG_N`）、微调 15000 步（`DAG_STEPS`，lr 3e-4）。老师只用于训练标注，部署仍无老师。M5 门禁读 `ml/runs/<头>_dagger.ckpt` 指向的模型；APG / 挖错的 BC 项也用 DAgger 样本。可断点续跑（采集、老师 shard、打包、微调各有完成标记）。
 - 显存预算**浮动**：整卡留 1 GB 给系统（`VRAM_RESERVE_GIB`，默认 1），训练与 APG 进程启动时按"整卡 − nvidia-smi 已用 − 余量"和"CUDA 空闲 − 余量"两者取小自设本进程上限（`ml/common/vram.py`）。占显存的应用多，上限就自动变小，不用改配置；想按定值对拍给 `VRAM_FRAC`（旧口径 0.78）。日志 `vram` 字段记峰值；预训练 `batch=1024` 实测峰值 2.76 GiB、APG `batch=48` 13.08 GiB。显存不够把 `batch` 改成 512。中断后再跑 `bash ml/pipeline.sh train`（或 `all`）会自动从 `ml/runs/<头>/last.pt` 续训（每 10 分钟存一次），测速那 2000 步做过就跳过。训练发散时不会用发散的权重覆盖 `last.pt` / `best.pt`。
 
 ## 7. M5 门禁：选定动作头
@@ -177,7 +201,7 @@ bash ml/pipeline.sh mine            # 默认 6 轮；ROUNDS=3 APG_STEPS=1000 MIN
 ## 10. 导出
 
 ```bash
-bash ml/pipeline.sh export          # fp32 ONNX + meta.json → webapp/models/（约 20 MB）
+bash ml/pipeline.sh export          # fp32 ONNX + meta.json（含 act_scale）→ webapp/models/（约 20 MB），导出 EMA 权重
 ```
 
 默认 fp32：部署走 wasm 与 Node CPU，fp16 在 CPU 后端上不保证更快。只有第 13 步用 `&ep=webgpu` 实测 `__POLICY.latency()` 明显受益时，才另导出 fp16 做对比：
@@ -220,6 +244,7 @@ python ml/serve.py                  # 带跨源隔离头的本地服务，wasm
 - 控制台 `__POLICY.latency()` 查看推理、前瞻、安全层、整次规划的 P50/P99 与节拍；`__POLICY.stats()` 查看刹停、换向、精修次数
 - `&autotest=30` 自动跑与 bench 同一批贴柱题，结果在 `__POLICY.autotest`
 - 运行时投影护栏 5 mm：候选动作离障碍 < 5 mm 时沿间隙梯度外推（训练数据的过滤线是 3 mm，护栏比数据更保守）
+- 动作尺度读模型 meta 的 `act_scale`；子目标按「越过顶点」切换（与训练标签同口径：沿拐角平分面越过当前途经点即换下一个，没有超时），与仿真 `closed_loop.sub_advance` 同一规则
 - 工具偏移 ≠ 0 时自动交回原规划器
 - 离线环境：`bash ml/prep/vendor_ort.sh` 把 onnxruntime-web 放到 `webapp/vendor/ort/`，地址加 `&ortLocal=1`（WebGPU 同样可用）
 
@@ -300,7 +325,8 @@ ml/
   sim/closed_loop.py       部署节奏闭环仿真（验证 / 挖错 / 门禁）
   apg/apg_finetune.py      APG 可微微调
   mining/                  tasks.py（无老师出题）、mine_round.py、gate.py（含 R7）、loop.sh
-  eval/                    dump_parity.cjs + check_parity.py（JS↔PyTorch 对拍）、check_r2.py（R2）、r4_probe.py（R4 无头浏览器探针）、acceptance.py（验收汇总）
+  eval/                    dump_parity.cjs + check_parity.py（JS↔PyTorch 对拍）、check_r2.py（R2）、r4_probe.py（R4 无头浏览器探针）、acceptance.py（验收汇总）、
+                           replay_teacher.py（开训前回放自检，含老师 oracle 走 rollout）、diag_cl.py（闭环失败定位 A/B/C/H）
   toy/toy_bimodal.py       2D 双模态对照实验（动作头选型依据）
   export_onnx.py  serve.py
   configs/                 base.json（MeanFlow）、wta.json（回退）、small.json（R4 不过时的 d=128）、apg.json

ml/apg/apg_finetune.py

@@ -6,7 +6,10 @@
 2026-10-18：展开长度不再定长 60 次推理（3.6 s，会截掉老师时长 > 3.6 s 的绕远题），改为覆盖本批 exec_s p90×1.2，上限 plans_max；
   "到达"仍是每 seg_plans 段末的距离项（无到达即停），属有意设计：段末项给出持续的接近梯度。
   margin_train 3 mm：与训练数据过滤线一致（认证最小间隙 < 3 mm 的老师轨迹不进训练集），碰撞项不与 BC 标签对抗；
-  运行时投影护栏独立保持 5 mm。端点与中点两个铰链取均值，与只查端点同量纲，w_col 无需重标。"""
+  运行时投影护栏独立保持 5 mm。端点与中点两个铰链取均值，与只查端点同量纲，w_col 无需重标。
+2026-10-19：起点取 EMA 权重（ckpt.load_policy）；动作反归一化乘 act_scale（与数据同一尺度，不一致报错），产物存 act_scale；
+  子目标推进改用 closed_loop.sub_advance（默认「越过顶点」，与标签同口径）；子目标头 BC 项用 sub 特征置零的输入（同 train.py）；
+  val 只取主数据目录（第一个 --samples）。"""
 import argparse, json, math, os, random, sys, time
 import torch
 
@@ -15,7 +18,7 @@ from ml.common.features import features, STEP, H, wrap180
 from ml.data import Samples, load_tasks
 from ml.model.policy import build, wta_loss
 from ml.model.meanflow import meanflow_loss
-from ml.sim.closed_loop import evaluate, tasks_to_tensors, goal_err
+from ml.sim.closed_loop import evaluate, tasks_to_tensors, goal_err, sub_advance
 from ml.common.ckpt import Saver, atomic_save, rng_state, set_rng_state
 from ml.common import vram
 
@@ -41,18 +44,23 @@ def main():
     dev = a.device; torch.manual_seed(a.seed); random.seed(a.seed)
     vram.limit()
     os.makedirs(a.out, exist_ok=True)
-    ck = torch.load(a.init, map_location=dev)
-    mcfg = ck['cfg']
-    model = build(mcfg).to(dev); model.load_state_dict(ck['model'])
+    from ml.common.ckpt import load_policy
+    model, ck = load_policy(a.init, dev); mcfg = ck['cfg']
     kin = Kin(device=dev)
-    data = Samples(a.samples, device=dev, split='train')
+    data = Samples(a.samples, device=dev, split='train', val_dirs=a.samples[:1])
+    act_scale = float(ck.get('act_scale', 1.0))
+    if abs(act_scale - data.act_scale) > 1e-9:
+        raise SystemExit(f'起点 act_scale={act_scale} 与样本 act_scale={data.act_scale} 不一致（BC 项标签尺度不同），换同一版数据训练的模型')
+    model.act_scale = act_scale
     all_tasks = load_tasks(a.samples)
-    train_tasks = [t for t in all_tasks if t['split'] == 'train'] + load_pool(a.pool)
-    val_tasks = [t for t in all_tasks if t['split'] == 'val'][:C['eval_tasks']]
+    main_tid = {t['tid'] for t in load_tasks(a.samples[:1]) if t['split'] == 'val'}
+    train_tasks = [t for t in all_tasks if t['tid'] not in main_tid] + load_pool(a.pool)
+    val_tasks = [t for t in load_tasks(a.samples[:1]) if t['split'] == 'val'][:C['eval_tasks']]
     w = [C['cat_weights'].get(t.get('cat', 'A'), 1.0) * (2.0 if t.get('hard') else 1.0) for t in train_tasks]
     opt = torch.optim.AdamW(model.parameters(), lr=C['lr'], betas=(0.9, 0.95), weight_decay=0.0)
     amp = dev.startswith('cuda') and C.get('amp') == 'bf16'
     step = torch.tensor(STEP, device=dev)
+    astep = step * act_scale                                   # 动作 → 度
     it0 = 0
     if a.resume and os.path.exists(a.resume):
         rk = torch.load(a.resume, map_location=dev); model.load_state_dict(rk['model'])
@@ -68,11 +76,11 @@ def main():
         base, _ = evaluate(model.eval(), kin, val_tasks, dev)
         print('EVAL0', json.dumps(base), flush=True); log.write(json.dumps({'eval': base, 'step': 0}) + '\n')
         best = base['success']
-        atomic_save({'model': model.state_dict(), 'cfg': mcfg, 'step': 0, 'fp': kin.fp, 'eval': base}, os.path.join(a.out, 'best.pt'))
+        atomic_save({'model': model.state_dict(), 'cfg': mcfg, 'step': 0, 'fp': kin.fp, 'eval': base, 'act_scale': act_scale}, os.path.join(a.out, 'best.pt'))
     M = C['margin_train_mm']; t0 = time.time()
     saver = Saver(C.get('ckpt_min', 10))             # 2026-10-18：每 10 分钟 + 收到停止请求时存 last.pt（不再只在每 500 次验证时存）
     def save_last(n, ev=None):
-        atomic_save({'model': model.state_dict(), 'opt': opt.state_dict(), 'cfg': mcfg, 'step': n, 'fp': kin.fp, 'eval': ev, 'rng': rng_state()}, os.path.join(a.out, 'last.pt')); saver.mark()
+        atomic_save({'model': model.state_dict(), 'opt': opt.state_dict(), 'cfg': mcfg, 'step': n, 'fp': kin.fp, 'eval': ev, 'rng': rng_state(), 'act_scale': act_scale}, os.path.join(a.out, 'last.pt')); saver.mark()
     for it in range(it0, C['steps']):
         model.train()
         batch = random.choices(train_tasks, weights=w, k=C['batch'])
@@ -81,7 +89,7 @@ def main():
         z = torch.randn(B, H, 6, device=dev)
         q, qp = q0.clone(), q0.clone()
         queue = torch.zeros(B, 0, 6, device=dev)
-        subs = torch.zeros(B, 2, 6, device=dev); nsub = torch.zeros(B, dtype=torch.long, device=dev); sub_t = torch.zeros(B, device=dev)
+        subs = torch.zeros(B, 2, 6, device=dev); nsub = torch.zeros(B, dtype=torch.long, device=dev); sub_t = torch.zeros(B, device=dev); sub_prev = q0.clone()
         opt.zero_grad(set_to_none=True)
         stats = {'col': 0.0, 'tgt': 0.0, 'smooth': 0.0}
         # 展开长度随本批任务时长：覆盖本批 exec_s 的 p90 × 1.2（无老师参考题按 6 s），夹在 [plans, plans_max]
@@ -95,11 +103,7 @@ def main():
             pre = torch.zeros(B, 3, 6, device=dev); pre[:, :r] = queue[:, :r]
             qe = q + queue.sum(1)
             with torch.no_grad():
-                if (nsub > 0).any():
-                    cur = subs[:, 0]; dd = torch.where(kin.cont, wrap180(cur - qe), cur - qe).abs().max(-1).values
-                    adv = (nsub > 0) & ((dd < 5) | (tnow - sub_t > 1.5))
-                    subs = torch.where(adv[:, None, None], torch.cat([subs[:, 1:], subs[:, 1:]], 1), subs)
-                    nsub = torch.where(adv, nsub - 1, nsub); sub_t = torch.where(adv, torch.full_like(sub_t, tnow), sub_t)
+                subs, nsub, sub_prev, sub_t = sub_advance(kin, subs, nsub, sub_prev, sub_t, qe.detach(), tnow)
             feat = features(kin, q, qp, T, R, pre, torch.full((B,), r, device=dev), subs[:, 0], (nsub > 0).float())
             with torch.autocast('cuda', dtype=torch.bfloat16, enabled=amp):
                 act, val, sub = model.sample_k(feat, 1, z)
@@ -108,8 +112,8 @@ def main():
                 with torch.no_grad():
                     need = sub[:, 12].float() > 0.5
                     subs = q.detach()[:, None] + sub[:, :12].float().view(B, 2, 6) * 180
-                    nsub = torch.where(need, torch.full_like(nsub, 2), torch.zeros_like(nsub))
-            inc = act.clamp(-1, 1) * step                              # [B,16,6]
+                    nsub = torch.where(need, torch.full_like(nsub, 2), torch.zeros_like(nsub)); sub_prev = q.detach().clone()
+            inc = act.clamp(-1, 1) * astep                             # [B,16,6]
             commit = inc[:, r:r + 3]
             if r == 0:   # 冷启动：先提交一块，下一轮才开始执行
                 queue = commit; continue
@@ -118,7 +122,7 @@ def main():
                 d = queue[:, k]
                 qp = q; q = kin.clamp_box(q + d)
                 # 碰撞铰链：端点 + 中点（与仿真/运行时的离散检查一致）
-                G = kin.gaps(torch.cat([q, 0.5 * (q + qp)], 0), M)
+                G = kin.gaps(torch.cat([q, 0.5 * (q + qp)], 0), M, pairs=True)
                 hinge = torch.relu(M - G['gap'])
                 col = torch.zeros(2 * B, device=dev).index_add(0, G['b'], hinge).view(2, B).mean(0)   # 端点与中点取均值：与只查端点时同量纲，w_col 无需重标
                 sm = ((d / step) ** 2).sum(-1) + (((d - prev_d) / step) ** 2).sum(-1)
@@ -135,13 +139,18 @@ def main():
                 stats['tgt'] += lt.mean().item()
                 (seg_loss / nseg).backward()
                 seg_loss = torch.zeros((), device=dev)
-                q, qp, queue, prev_d = q.detach(), qp.detach(), queue.detach(), prev_d.detach()
+                # 只 detach 状态并重置队列：段边界下一 plan 走 r=0 重新提交（新图有梯度）；
+                # 沿用旧 queue 会跨过已 backward 的图（二次 backward 报错），也避免整段无梯度
+                q, qp, prev_d = q.detach(), qp.detach(), prev_d.detach()
+                queue = torch.zeros(B, 0, 6, device=dev)
         # BC 锚定
         X, Y, V, SG = data.batch(C['batch'] * 4)
         with torch.autocast('cuda', dtype=torch.bfloat16, enabled=amp):
             mem = model.encode(X)
             l_bc = wta_loss(model, mem, Y)[0] if model.head == 'wta' else meanflow_loss(model, mem, Y)[0]
-            v, s = model.heads(mem)
+            v, _ = model.heads(mem)
+            Xs = X.clone(); Xs[:, 68:75] = 0
+            _, s = model.heads(model.encode(Xs))
         l_bc = l_bc + 0.1 * (v.float() - V).abs().mean() + 0.1 * (s.float() - SG).abs().mean()
         (C['w_bc'] * l_bc).backward()
         gn = torch.nn.utils.clip_grad_norm_(model.parameters(), C['grad_clip'])
@@ -160,7 +169,7 @@ def main():
             res, _ = evaluate(model.eval(), kin, val_tasks, dev)
             res['it'] = it + 1; res['t'] = time.time()
             print('EVAL', json.dumps(res), flush=True); log.write(json.dumps({'eval': res}) + '\n'); log.flush()
-            sd = {'model': model.state_dict(), 'cfg': mcfg, 'step': it + 1, 'fp': kin.fp, 'eval': res}
+            sd = {'model': model.state_dict(), 'cfg': mcfg, 'step': it + 1, 'fp': kin.fp, 'eval': res, 'act_scale': act_scale}
             save_last(it + 1, res)                                                      # last 带优化器状态供续跑；best 不带（导出/门禁用）
             if res['success'] > best + 1e-4:
                 best = res['success']; atomic_save(sd, os.path.join(a.out, 'best.pt'))

ml/common/ckpt.py

@@ -60,3 +60,33 @@ def set_rng_state(d):
         try: torch.cuda.set_rng_state_all([t.cpu() for t in d['cuda']])
         except Exception: pass
     return True
+
+
+def load_policy(path, device, prefer_ema=True):
+    """载入策略（2026-10-19，审查 review_model_train P0-2）：优先取 EMA 权重 ck['ema']（train.py 起存），没有就用 ck['model']（旧 checkpoint、APG 产物）。
+    model.act_scale = ck['act_scale']（动作标签归一化倍数，见 ml/prep/build_dataset.cjs ACT_SCALE）；旧 checkpoint 缺省 1.0 = 原口径。
+    闭环仿真 / DAgger / APG 起点 / 挖错 / 门禁 / 验收 / 导出都经这里载入，保证同一份权重、同一个动作尺度。返回 (model.eval(), ck)。"""
+    from ml.model.policy import build
+    ck = torch.load(path, map_location=device)
+    m = build(ck['cfg']).to(device)
+    sd = ck.get('ema') if prefer_ema and ck.get('ema') is not None else ck['model']
+    m.load_state_dict(sd)
+    m.act_scale = float(ck.get('act_scale', 1.0))
+    return m.eval(), ck
+
+
+def pick_start(run_dir):
+    """DAgger 起点（2026-10-19，审查 P0-2）：best.pt 的闭环 success > 0 才用 best.pt；否则用 last.pt
+    （success 全 0 时 best.pt 只由开环误差决定，可能落在 p_neq 预热期，一步映射没训过）。载入时取 EMA。"""
+    best, last = os.path.join(run_dir, 'best.pt'), os.path.join(run_dir, 'last.pt')
+    if os.path.exists(best):
+        ev = torch.load(best, map_location='cpu').get('eval') or {}
+        if (ev.get('success') or 0) > 0 or not os.path.exists(last): return best
+    return last if os.path.exists(last) else best
+
+
+if __name__ == '__main__':
+    # python -m ml.common.ckpt pick <运行目录>   → 打印 DAgger 起点 checkpoint 路径
+    import sys
+    if len(sys.argv) == 3 and sys.argv[1] == 'pick': print(pick_start(sys.argv[2]))
+    else: raise SystemExit('usage: python -m ml.common.ckpt pick <run_dir>')

ml/common/features.py

@@ -52,8 +52,10 @@ def features(kin, q, q_prev, T, R, prefix, prefix_len, sub, sub_flag, gm=None, x
     out.append(sd)
     out.append(sub_flag[:, None].to(dt))
     if gm is None:
-        gm = kin.gaps(q, GAP_CAP, xf)['gm']
-    out.append(torch.stack([gm[:, a * 7 + b].clamp(max=GAP_CAP) / GAP_CAP for a, b in GP], -1))
+        out.append(kin.gm_groups(q, GP, GAP_CAP, xf=xf) / GAP_CAP)   # 2026-10-20：只算特征用到的 8 组；xf 复用不重复算 FK
+        gm = None
+    if gm is not None:
+        out.append(torch.stack([gm[:, a * 7 + b].clamp(max=GAP_CAP) / GAP_CAP for a, b in GP], -1))
     f = torch.cat(out, -1)
     assert f.shape[1] == F_DIM, f.shape
     return f

ml/common/kin_torch.py

@@ -38,7 +38,8 @@ def seg_seg_dist(p1, q1, p2, q2, eps=1e-12):
     s = torch.where(t_lo, (-c / a.clamp_min(eps)).clamp(0, 1), s)
     s = torch.where(t_hi, ((b - c) / a.clamp_min(eps)).clamp(0, 1), s)
     t = t.clamp(0, 1)
-    # 退化（线段长度≈0）
+    # 第二条退化成点时，仍须在第一条上投影，而不是固定取其起点。
+    s = torch.where(e <= eps, (-c / a.clamp_min(eps)).clamp(0, 1), s)
     s = torch.where(a <= eps, torch.zeros_like(s), s)
     t = torch.where(e <= eps, torch.zeros_like(t), t)
     c1 = p1 + d1 * s.unsqueeze(-1)
@@ -85,8 +86,36 @@ class Kin:
         gi, gj = self.cap_g[self.pi], self.cap_g[self.pj]
         self.pair_gp = torch.minimum(gi, gj) * 7 + torch.maximum(gi, gj)
         self.lever = T(K['lever'])
+        table = [[0.0] * 7 for _ in range(6)]
+        for group in range(1, 7):
+            endpoints = [c[key] for c in caps if c['g'] == group for key in ('a', 'b')]
+            if not endpoints:
+                continue
+            pivot, axis = K['P'][group - 1], K['D'][group - 1]
+            unit = [v / math.hypot(*axis) for v in axis]
+            relative = [[e[j] - pivot[j] for j in range(3)] for e in endpoints]
+            radius = max(math.hypot(*v) for v in relative)
+            radial = max(math.hypot(v[1] * unit[2] - v[2] * unit[1],
+                                    v[2] * unit[0] - v[0] * unit[2],
+                                    v[0] * unit[1] - v[1] * unit[0]) for v in relative)
+            for joint in range(group):
+                chain = sum(math.dist(K['P'][j], K['P'][j + 1]) for j in range(joint, group - 1))
+                table[joint][group] = (chain + (radial if joint == group - 1 else radius)) * D2R
+        self.cert_groups = torch.tensor([a * 7 + b for a in range(7) for b in range(a + 2, 7)], device=device)
+        # 三角不等式给出全姿态界，不用随机姿态最大值冒充上界。
+        self.cert_lever = T([[table[k][b] if a <= k < b else 0.0 for k in range(6)]
+                             for a in range(7) for b in range(a + 2, 7)])
 
     # ---------------- 运动学 ----------------
+    def _checked_xf(self, q, xf):
+        """xf 是按行对应 q 的位姿数组，行数不匹配会静默广播出错（宽相位筛到别的行 ⇒ device assert 或错间隙）。"""
+        if xf is None:
+            return self.cum_xf(q)
+        Rs, Ts = xf
+        if Rs.shape[0] != q.shape[0] or Ts.shape[0] != q.shape[0]:
+            raise ValueError('xf 的行数 %d 与 q 的行数 %d 不符' % (Rs.shape[0], q.shape[0]))
+        return xf
+
     def cum_xf(self, q):
         """q: [B,6] 度 → Rs [B,7,3,3], Ts [B,7,3]"""
         B = q.shape[0]
@@ -110,6 +139,19 @@ class Kin:
         Rs, _ = xf if xf is not None else self.cum_xf(q)
         return Rs[:, 6]
 
+    def jac(self, q, xf=None):
+        """几何雅可比（对度）：返回 (Jv [B,3,6] mm/deg, Jw [B,3,6] 单位轴/deg)"""
+        Rs, Ts = xf if xf is not None else self.cum_xf(q)
+        p = self.fk(q, (Rs, Ts))
+        Jv, Jw = [], []
+        for k in range(6):
+            d = torch.tensor(self.D[k], dtype=q.dtype, device=q.device)
+            a = Rs[:, k] @ d
+            o = torch.einsum('bij,j->bi', Rs[:, k], self.P[k].to(q.dtype)) + Ts[:, k]
+            Jv.append(torch.linalg.cross(a, p - o, dim=-1) * D2R)
+            Jw.append(a * D2R)
+        return torch.stack(Jv, -1), torch.stack(Jw, -1)
+
     def caps_world(self, q, xf=None):
         Rs, Ts = xf if xf is not None else self.cum_xf(q)
         Rg, Tg = Rs[:, self.cap_g], Ts[:, self.cap_g]               # [B,C,3,3], [B,C,3]
@@ -118,19 +160,73 @@ class Kin:
         return a, b
 
     # ---------------- 间隙 ----------------
-    def gaps(self, q, cap=40.0, xf=None, max_pairs=None):
+    # 2026-10-19（用户实测 dagger/诊断吃满 24 GB 显存）：本模型 1936 条胶囊 / 491 组 / 67256 粗对 / 104.7 万细对。
+    # 显存有两段峰值，都随点数线性涨：
+    #   粗筛段 cc[:,cp_a]-cc[:,cp_b] 的广播中间量 ≈ 36 B × 点数 × 粗对数（4096 点实测 9.3 GiB，与 cap 无关）；
+    #   精算段 ≈ 每对几百字节 × 幸存细对数（4096 点 cap 40 幸存 2.4 亿对；旧版不分块实测 36.9 GiB）。
+    # 所以先按 COARSE_ENTRIES 把点切块（粗筛每块 ≤ ~1 GiB），块内再按幸存细对数 PAIR_BUDGET 切（精算每块 ≤ ~1 GiB）。
+    # 两段不同时存在，峰值与调用方 batch 大小无关。结果与不分块逐位一致（梯度经 cat 保留）。
+    COARSE_ENTRIES = 30_000_000
+    PAIR_BUDGET = 2_000_000
+
+    @staticmethod
+    def _cat_gaps(parts, starts):
+        out = {'gm': torch.cat([p.pop('gm') for p in parts], 0)}
+        if 'b' in parts[0]:
+            # 非 in-place：b 会被 autograd 的索引反向图引用（APG 的碰撞铰链梯度路径），+= 会让 backward 报 version 错
+            for p, s in zip(parts, starts): p['b'] = p['b'] + s
+            for k in ('b', 'i', 'j', 'gap'): out[k] = torch.cat([p.pop(k) for p in parts])   # 逐键拼、拼完即释放
+        return out
+
+    def gaps(self, q, cap=40.0, xf=None, max_pairs=None, pairs=False):
         """返回 dict：
              gm  [B,49]：组对最小间隙 min(gap, cap)（gA*7+gB，gA<gB；其余为 cap）
-             b, i, j, gap：幸存胶囊对（gap 可微）
+             pairs=True 时另有 b, i, j, gap：幸存胶囊对（gap 可微；只有 APG 的 hinge 与 check_parity 需要）
+           2026-10-19（用户实测 4096 点 cap 40 峰值 4.46 GiB 全在拼接 8.6e7 对的 b/i/j/gap）：
+             默认只返回 gm，每块算完就丢掉胶囊对，峰值只剩单块。
         """
-        xf = xf if xf is not None else self.cum_xf(q)
+        xf = self._checked_xf(q, xf)
+        Rs, Ts = xf
+        B = q.shape[0]
+        step = max(1, self.COARSE_ENTRIES // int(self.cp_a.shape[0]))
+        if B <= step:
+            return self._gaps_split(q, cap, xf, pairs)
+        st = list(range(0, B, step))
+        return self._cat_gaps([self._gaps_split(q[s:s + step], cap, (Rs[s:s + step], Ts[s:s + step]), pairs) for s in st], st)
+
+    def _coarse(self, q, cap, xf):
+        Rs, Ts = xf
+        cc = torch.einsum('bkij,kj->bki', Rs[:, self.cl_g], self.cl_c.to(q.dtype)) + Ts[:, self.cl_g]
+        d2 = (cc[:, self.cp_a] - cc[:, self.cp_b]).pow(2).sum(-1)          # [B,M]
+        del cc
+        return d2 <= (self.cp_lim + cap).pow(2)
+
+    def _gaps_split(self, q, cap, xf, pairs):
+        """粗筛已在显存预算内：按幸存细对数再切块做精算"""
         Rs, Ts = xf
         B = q.shape[0]
         with torch.no_grad():
-            cc = torch.einsum('bkij,kj->bki', Rs[:, self.cl_g], self.cl_c.to(q.dtype)) + Ts[:, self.cl_g]
-            d2 = (cc[:, self.cp_a] - cc[:, self.cp_b]).pow(2).sum(-1)          # [B,M]
-            keep = d2 <= (self.cp_lim + cap).pow(2)
+            per = (self._coarse(q, cap, xf).long() * self.cp_cnt).sum(1)    # [B] 每点幸存细对数
+            if B <= 1 or int(per.sum()) <= self.PAIR_BUDGET:
+                bounds = [0, B]
+            else:
+                cs = torch.cumsum(per, 0).tolist(); bounds = [0]; base = 0
+                for k, c in enumerate(cs):
+                    if c - base > self.PAIR_BUDGET and k > bounds[-1]:
+                        bounds.append(k); base = cs[k - 1]
+                bounds.append(B)
+            del per
+        if len(bounds) == 2:
+            return self._gaps_one(q, cap, xf, pairs)
+        return self._cat_gaps([self._gaps_one(q[s:e], cap, (Rs[s:e], Ts[s:e]), pairs) for s, e in zip(bounds[:-1], bounds[1:])], bounds[:-1])
+
+    def _gaps_one(self, q, cap, xf, pairs):
+        Rs, Ts = xf
+        B = q.shape[0]
+        with torch.no_grad():
+            keep = self._coarse(q, cap, xf)
             bb, mm = keep.nonzero(as_tuple=True)
+            del keep
             cnt = self.cp_cnt[mm]
             rep_b = torch.repeat_interleave(bb, cnt)
             off = torch.repeat_interleave(self.cp_start[mm] - torch.cumsum(cnt, 0) + cnt, cnt) + torch.arange(int(cnt.sum()), device=q.device)
@@ -145,8 +241,130 @@ class Kin:
         gap = d - self.pair_need[pidx].to(q.dtype)
         gm = torch.full((B * 49,), float(cap), dtype=q.dtype, device=q.device)
         gm = gm.scatter_reduce(0, rep_b * 49 + self.pair_gp[pidx], gap.clamp(max=cap), reduce='amin', include_self=True)
+        if not pairs: return {'gm': gm.view(B, 49)}
         return {'gm': gm.view(B, 49), 'b': rep_b, 'i': pi, 'j': pj, 'gap': gap}
 
+    def gm_groups(self, q, gp, cap=40.0, xf=None):
+        """只算指定组对 gp=[(a,b),...] 的最小间隙 [B,len(gp)]（特征用，避免 49 组全量）。
+        数值与 gaps(q,cap)['gm'][:, a*7+b] 一致；组对在碰撞粗对里不存在时返回 cap。
+        xf 可传入调用者已算好的 cum_xf(q)，避免同一姿态重复算 FK（特征路径每周期省一次）。"""
+        key = tuple(gp)
+        if getattr(self, '_gp_key', None) != key:
+            m = torch.full((49,), -1, dtype=torch.long, device=q.device)
+            for i, (a_, b_) in enumerate(gp): m[min(a_, b_) * 7 + max(a_, b_)] = i
+            ga, gb = self.cl_g[self.cp_a], self.cl_g[self.cp_b]
+            cg = torch.minimum(ga, gb) * 7 + torch.maximum(ga, gb)   # 簇对 → 7 连杆组对
+            sel = torch.isin(cg, torch.tensor([min(a, b) * 7 + max(a, b) for a, b in gp], device=q.device))
+            self._gp = (m, sel, sel.nonzero(as_tuple=True)[0]); self._gp_key = key
+        self._gp49, sel, idx = self._gp
+        xf = self._checked_xf(q, xf); Rs, Ts = xf; B = q.shape[0]
+        with torch.no_grad():
+            cc = torch.einsum('bkij,kj->bki', Rs[:, self.cl_g], self.cl_c.to(q.dtype)) + Ts[:, self.cl_g]
+            d2 = (cc[:, self.cp_a[idx]] - cc[:, self.cp_b[idx]]).pow(2).sum(-1)
+            keep = d2 <= (self.cp_lim[idx] + cap).pow(2)
+            bb, mm = keep.nonzero(as_tuple=True)
+            del keep, d2, cc
+            cnt = self.cp_cnt[idx][mm]
+            rep_b = torch.repeat_interleave(bb, cnt)
+            off = torch.repeat_interleave(self.cp_start[idx][mm] - torch.cumsum(cnt, 0) + cnt, cnt) + torch.arange(int(cnt.sum()), device=q.device)
+            pidx = off
+        a, b = self.caps_world(q, xf)
+        with torch.no_grad():
+            pi, pj = self.pi[pidx], self.pj[pidx]
+            mid = 0.5 * (a[rep_b, pi] + b[rep_b, pi] - a[rep_b, pj] - b[rep_b, pj])
+            k2 = mid.pow(2).sum(-1) <= (self.pair_bl[pidx] + cap).pow(2)
+            rep_b, pidx, pi, pj = rep_b[k2], pidx[k2], pi[k2], pj[k2]
+        d = seg_seg_dist(a[rep_b, pi], b[rep_b, pi], a[rep_b, pj], b[rep_b, pj])
+        gap = d - self.pair_need[pidx].to(q.dtype)
+        gm = torch.full((B * len(gp),), float(cap), dtype=q.dtype, device=q.device)
+        gm = gm.scatter_reduce(0, rep_b * len(gp) + self._gp49[self.pair_gp[pidx]], gap.clamp(max=cap), reduce='amin', include_self=True)
+        return gm.view(B, len(gp))
+
+    @torch.no_grad()
+    def certify_segments(self, a, b, max_queries=32, max_depth=12, eps=1e-4, cap=20.0):
+        """逐层二分认证：每根段独立查询预算，未知（超预算/超深度/非有限/越界）一律拒绝。
+
+        判据对每条组对：子段两端间隙之和 > 该子段位移界 + 2eps（间隙取 min(gap,cap)，钳制只会更保守）。
+        cap 必须 ≥ 该层子段界 + 2eps 才不会挡住本可通过的判定，故不做自适应收紧——同批其他段会改变
+        钳制程度、让结果随批次而变（实测也无耗时收益，见探索日志轮次 31）。
+        """
+        if self.dtype != torch.float64 or a.dtype != torch.float64 or b.dtype != torch.float64:
+            raise ValueError('segment certification requires float64')
+        if a.shape != b.shape or a.ndim != 2 or a.shape[1] != 6:
+            raise ValueError('a and b must be [count,6] with identical shape')
+        # 预算给成张量时 max_depth + 1 会在 uint8 这类窄类型上回绕成 0，循环整个跳过，把碰撞段当安全返回。
+        if type(max_queries) is not int or type(max_depth) is not int:
+            raise ValueError('certification budgets must be plain ints')
+        if max_queries < 2 or max_depth < 0 or eps <= 0 or cap <= eps:
+            raise ValueError('invalid certification budget or tolerance')
+        count = a.shape[0]
+        status = torch.zeros(count, dtype=torch.long, device=a.device)
+        inside = (((a >= self.lo) & (a <= self.hi) & (b >= self.lo) & (b <= self.hi)) | self.cont).all(-1)
+        status[~inside] = 3
+        root = torch.arange(count, device=a.device)
+        gaps = self.gaps(torch.cat([a, b]), cap)['gm'][:, self.cert_groups]
+        ga, gb = gaps[:count], gaps[count:]
+        queries = torch.full((count,), 2, dtype=torch.long, device=a.device)
+        bound = (b - a).abs() @ self.cert_lever.T
+        for depth in range(max_depth + 1):
+            finite = torch.isfinite(ga).all(-1) & torch.isfinite(gb).all(-1)
+            collision = (ga <= 0).any(-1) | (gb <= 0).any(-1)
+            status[root[~finite]] = 2
+            status[root[collision]] = 1
+            positive = (ga > eps).all(-1) & (gb > eps).all(-1)
+            proven = positive & (ga + gb > bound + 2 * eps).all(-1)
+            pending = (status[root] == 0) & ~proven
+            if not bool(pending.any()):
+                break
+            a, b, ga, gb, root, bound = a[pending], b[pending], ga[pending], gb[pending], root[pending], bound[pending]
+            if depth == max_depth:
+                status[root] = 2
+                break
+            requested = torch.bincount(root, minlength=count)
+            status[(status == 0) & (queries + requested > max_queries)] = 2
+            keep = status[root] == 0
+            a, b, ga, gb, root, bound = (t[keep] for t in (a, b, ga, gb, root, bound))
+            if not root.numel():
+                break
+            mid = a + 0.5 * (b - a)
+            gm = self.gaps(mid, cap)['gm'][:, self.cert_groups]
+            queries += torch.bincount(root, minlength=count)
+            a, b = torch.cat([a, mid]), torch.cat([mid, b])
+            ga, gb = torch.cat([ga, gm]), torch.cat([gm, gb])
+            root = torch.cat([root, root])
+            bound = torch.cat([bound, bound]) / 2
+        return {'safe': status == 0, 'collision': status == 1, 'unresolved': status == 2,
+                'outside_box': status == 3, 'queries': queries}
+
+    @torch.no_grad()
+    def certify_uniform(self, a, b, n=64, eps=1e-4, cap=None):
+        """固定层数的均匀细分认证：n 个子段只需一次 gaps 调用（n+1 个点），没有逐层依赖的往返。
+
+        判据与 certify_segments 完全相同；界对 Δq 线性，所以子段界 = 整段界 / n。未通过即 unproven
+        （拒绝），不存在“未知当安全”。cap=None 时取“最小不挡住可通过判定的宽相位”= 最大子段界 + 2eps：
+        小于它钳制会把本可证明的子段压成不可证（偏保守），大于它只是多算对（偏慢），不改正确性。
+        """
+        if self.dtype != torch.float64 or a.dtype != torch.float64 or b.dtype != torch.float64:
+            raise ValueError('segment certification requires float64')
+        if type(n) is not int or n < 1 or eps <= 0 or (cap is not None and cap <= eps):
+            raise ValueError('invalid subdivision count or tolerance')
+        if a.shape != b.shape or a.ndim != 2 or a.shape[1] != 6:
+            raise ValueError('a and b must be [count,6] with identical shape')
+        count = a.shape[0]
+        inside = (((a >= self.lo) & (a <= self.hi) & (b >= self.lo) & (b <= self.hi)) | self.cont).all(-1)
+        bound = (b - a).abs() @ self.cert_lever.T / n                       # [count,15] 子段界
+        required = float(bound.max()) + 2 * eps if count else 2 * eps
+        qc = required if cap is None else cap
+        alpha = torch.arange(n + 1, dtype=self.dtype, device=a.device) / n
+        points = (a[:, None] + (b - a)[:, None] * alpha[None, :, None]).reshape(-1, 6)
+        gm = self.gaps(points, qc)['gm'][:, self.cert_groups].view(count, n + 1, -1)
+        adjacent = gm[:, :-1] + gm[:, 1:] > bound[:, None, :] + 2 * eps
+        collision = (gm <= 0).any((1, 2))
+        safe = inside & (gm > eps).all((1, 2)) & adjacent.all((1, 2)) & ~collision
+        return {'safe': safe, 'collision': collision, 'unproven': (~safe & ~collision & inside),
+                'outside_box': ~inside, 'points': n + 1, 'queries': n + 1,
+                'cap_required_mm': required, 'cap_used_mm': qc}
+
     def min_gap(self, q, cap=40.0):
         return self.gaps(q, cap)['gm'].min(-1).values
 

ml/configs/base.json

@@ -1,10 +1,11 @@
 {
   "model": {"d": 192, "heads": 8, "ff": 768, "enc": 4, "dec": 4},
   "train": {
-    "batch": 1024, "lr": 1e-3, "warmup": 1000, "steps": 60000, "wd": 0.01, "betas": [0.9, 0.95],
+    "batch": 1024, "lr": 1e-3, "warmup": 1000, "steps": 24000, "wd": 0.01, "betas": [0.9, 0.95],
     "amp": "bf16", "grad_clip": 1.0,
     "w_mf": 1.0, "w_fk": 0.5, "w_smooth": 0.05, "w_value": 0.1, "w_sub": 0.1,
-    "p_neq": 0.25, "fk_caps": 96,
+    "p_neq": 0.5, "p_edge": 0.1, "p_neq_warm": 5000, "fk_tmax": 0.3, "fk_caps": 96,
+    "ema": 0.999, "aug_pre_drop": 0.15, "aug_pre_sigma": 0.1, "aug_dq_sigma": 0.3,
     "ckpt_min": 10, "eval_every": 2000, "eval_tasks": 512, "log_every": 50, "patience_evals": 5
   }
 }

ml/configs/base_dag2.json

@@ -0,0 +1,11 @@
+{
+  "model": {"d": 192, "heads": 8, "ff": 768, "enc": 4, "dec": 4},
+  "train": {
+    "batch": 1024, "lr": 1e-3, "warmup": 1000, "steps": 24000, "wd": 0.01, "betas": [0.9, 0.95],
+    "amp": "bf16", "grad_clip": 1.0,
+    "w_mf": 1.0, "w_fk": 0.5, "w_smooth": 0.05, "w_value": 0.1, "w_sub": 0.1,
+    "p_neq": 0.5, "p_edge": 0.1, "p_neq_warm": 5000, "fk_tmax": 0.3, "fk_caps": 96,
+    "ema": 0.999, "aug_pre_drop": 0.15, "aug_pre_sigma": 0.1, "aug_dq_sigma": 0.3,
+    "ckpt_min": 10, "eval_every": 2000, "eval_tasks": 512, "log_every": 50, "patience_evals": 5
+  }
+}

ml/configs/base_dag3.json

@@ -0,0 +1,11 @@
+{
+  "model": {"d": 192, "heads": 8, "ff": 768, "enc": 4, "dec": 4},
+  "train": {
+    "batch": 1024, "lr": 1e-3, "warmup": 1000, "steps": 24000, "wd": 0.01, "betas": [0.9, 0.95],
+    "amp": "bf16", "grad_clip": 1.0,
+    "w_mf": 1.0, "w_fk": 0.5, "w_smooth": 0.05, "w_value": 0.1, "w_sub": 0.1,
+    "p_neq": 0.5, "p_edge": 0.1, "p_neq_warm": 5000, "fk_tmax": 0.3, "fk_caps": 96,
+    "ema": 0.999, "aug_pre_drop": 0.15, "aug_pre_sigma": 0.1, "aug_dq_sigma": 0.3,
+    "ckpt_min": 10, "eval_every": 2000, "eval_tasks": 512, "log_every": 50, "patience_evals": 5
+  }
+}

ml/configs/distill.json

@@ -0,0 +1,41 @@
+{
+  "model": {
+    "d": 192,
+    "heads": 8,
+    "ff": 768,
+    "enc": 4,
+    "dec": 4
+  },
+  "train": {
+    "batch": 1024,
+    "lr": 0.0001,
+    "warmup": 1000,
+    "steps": 3000,
+    "wd": 0.01,
+    "betas": [
+      0.9,
+      0.95
+    ],
+    "amp": "bf16",
+    "grad_clip": 1.0,
+    "w_mf": 1.0,
+    "w_fk": 0.1,
+    "w_smooth": 0.01,
+    "w_value": 0.0,
+    "w_sub": 0.0,
+    "p_neq": 0.5,
+    "p_edge": 0.1,
+    "p_neq_warm": 0,
+    "fk_tmax": 0.3,
+    "fk_caps": 96,
+    "ema": 0.999,
+    "aug_pre_drop": 0.15,
+    "aug_pre_sigma": 0.1,
+    "aug_dq_sigma": 0.3,
+    "ckpt_min": 10,
+    "eval_every": 1000,
+    "eval_tasks": 256,
+    "log_every": 50,
+    "patience_evals": 3
+  }
+}

ml/configs/small.json

@@ -1,10 +1,11 @@
 {
   "model": {"d": 128, "heads": 8, "ff": 512, "enc": 4, "dec": 4},
   "train": {
-    "batch": 1024, "lr": 1e-3, "warmup": 1000, "steps": 60000, "wd": 0.01, "betas": [0.9, 0.95],
+    "batch": 1024, "lr": 1e-3, "warmup": 1000, "steps": 24000, "wd": 0.01, "betas": [0.9, 0.95],
     "amp": "bf16", "grad_clip": 1.0,
     "w_mf": 1.0, "w_fk": 0.5, "w_smooth": 0.05, "w_value": 0.1, "w_sub": 0.1,
-    "p_neq": 0.25, "fk_caps": 96,
+    "p_neq": 0.5, "p_edge": 0.1, "p_neq_warm": 5000, "fk_tmax": 0.3, "fk_caps": 96,
+    "ema": 0.999, "aug_pre_drop": 0.15, "aug_pre_sigma": 0.1, "aug_dq_sigma": 0.3,
     "ckpt_min": 10, "eval_every": 2000, "eval_tasks": 512, "log_every": 50, "patience_evals": 5
   }
 }

ml/configs/smoke.json

@@ -29,15 +29,36 @@
   "eval_every": 100,
   "eval_tasks": 16,
   "log_every": 10,
-  "patience_evals": 5
+  "patience_evals": 5,
+  "p_neq_warm": 100,
+  "fk_tmax": 0.3
  },
  "apg": {
-  "batch": 8, "lr": 0.0001, "steps": 10, "grad_clip": 1.0, "amp": "bf16",
-  "plans": 20, "plans_max": 30, "seg_plans": 5,
+  "batch": 8,
+  "lr": 0.0001,
+  "steps": 10,
+  "grad_clip": 1.0,
+  "amp": "bf16",
+  "plans": 20,
+  "plans_max": 30,
+  "seg_plans": 5,
   "margin_train_mm": 3.0,
-  "w_tgt": 1.0, "w_rot": 0.3, "w_col": 2.0, "w_smooth": 0.02, "w_len": 0.001, "w_bc": 0.5,
-  "cat_weights": {"A": 0.4, "B": 1.0, "C": 1.6, "D": 0.6, "Dr": 0.6},
-  "ckpt_min": 10, "eval_every": 1000, "eval_tasks": 4
+  "w_tgt": 1.0,
+  "w_rot": 0.3,
+  "w_col": 2.0,
+  "w_smooth": 0.02,
+  "w_len": 0.001,
+  "w_bc": 0.5,
+  "cat_weights": {
+   "A": 0.4,
+   "B": 1.0,
+   "C": 1.6,
+   "D": 0.6,
+   "Dr": 0.6
+  },
+  "ckpt_min": 10,
+  "eval_every": 1000,
+  "eval_tasks": 4
  },
  "_note": "冒烟与自检专用（bash ml/pipeline.sh selftest / smoke）：只验证流程能跑通，数值无意义。apg 段必须有：selftest.sh 第 6 项原先不带 --config，走的是正式 apg.json 的 batch=128，本机实测第一次反向就 OOM；改成正式值 48 也要约 13 GiB，自检不必吃这么多。"
 }

ml/configs/wta.json

@@ -1,10 +1,11 @@
 {
   "model": {"d": 192, "heads": 8, "ff": 768, "enc": 4, "dec": 4, "head": "wta", "K": 8},
   "train": {
-    "batch": 1024, "lr": 1e-3, "warmup": 1000, "steps": 60000, "wd": 0.01, "betas": [0.9, 0.95],
+    "batch": 1024, "lr": 1e-3, "warmup": 1000, "steps": 24000, "wd": 0.01, "betas": [0.9, 0.95],
     "amp": "bf16", "grad_clip": 1.0,
     "w_mf": 1.0, "w_fk": 0.5, "w_smooth": 0.05, "w_value": 0.1, "w_sub": 0.1,
-    "p_neq": 0.25, "fk_caps": 96,
+    "p_neq": 0.5, "p_edge": 0.1, "p_neq_warm": 5000, "fk_tmax": 0.3, "fk_caps": 96,
+    "ema": 0.999, "aug_pre_drop": 0.15, "aug_pre_sigma": 0.1, "aug_dq_sigma": 0.3,
     "ckpt_min": 10, "eval_every": 2000, "eval_tasks": 512, "log_every": 50, "patience_evals": 5
   }
 }

ml/dagger/collect.py

@@ -0,0 +1,92 @@
+"""DAgger 状态采集（2026-10-18 首次正式预训练后新增）：用当前策略在 train 任务上闭环跑（关安全层），
+从它自己走到的状态里挑起点，交给老师重新规划 → 这些"策略会去、老师数据里没有"的状态拿到正确标签。
+  python -m ml.dagger.collect --ckpt ml/runs/base/best.pt --samples ml/data/samples --n 8000 --seed 1 --parts 28 --out ml/data/dag1
+每题最多取 2 个起点：
+  - 撞了的题：首次碰撞前 0.2 s 的状态（策略"快要撞上"的地方，最有用）；
+  - 另取一个 [0.3 s, 首撞前或结束] 内均匀随机时刻的状态（偏离老师的一般状态）。
+起点必须无碰且间隙 > MIN_GAP_MM（老师从碰撞态出发规划不出来，与 build_dataset 的增广接受同一地板），且离目标 > 5 mm（否则 DLS 接管，不需要老师）。
+输出 tasks_XX.jsonl（按 --parts 均分，供 gen_dataset.cjs --tasks 并行），每行 {q0, qPrev, T, R, cat, src}。
+2026-10-19（审查 F7 / C10）：同时记录策略在该时刻的上一帧 qPrev；老师重规划的时间律从当前速度（v0）起步，
+  t=0 样本的 dq 特征用真实上一帧——原来一律按静止起步标注，DAgger 样本不是策略真正到过的 (q, dq) 状态。
+为什么需要：纯行为克隆在闭环里会偏出老师分布（首次 21850 步闭环到达 0%），原方案指望 APG/挖错修，但它们没法从 0% 起步。
+老师只用于训练标注，部署仍然无老师。"""
+import argparse, json, os, random
+import torch
+
+from ml.common.kin_torch import Kin
+from ml.data import load_tasks
+from ml.model.policy import build
+from ml.sim.closed_loop import rollout, goal_err, tasks_to_tensors, DT
+
+GAP_CHUNK = 1024      # 每次 kin.gaps 的查询点数上限
+
+
+def main():
+    ap = argparse.ArgumentParser()
+    ap.add_argument('--ckpt', required=True); ap.add_argument('--samples', nargs='+', default=['ml/data/samples'])
+    ap.add_argument('--n', type=int, default=8000); ap.add_argument('--seed', type=int, default=1)
+    ap.add_argument('--parts', type=int, default=8); ap.add_argument('--out', required=True)
+    ap.add_argument('--bs', type=int, default=64)
+    ap.add_argument('--device', default='cuda' if torch.cuda.is_available() else 'cpu')
+    ap.add_argument('--fb_gain', type=float, default=0.0, help='部署分布采集：目标反馈增益（与 rollout 一致）')
+    ap.add_argument('--safety', type=int, default=0, help='部署分布采集：是否开安全层')
+    ap.add_argument('--replan', default='r3'); ap.add_argument('--commit_n', type=int, default=3)
+    ap.add_argument('--safety_partial', type=int, default=0)
+    a = ap.parse_args()
+    gap_min = float(os.environ.get('MIN_GAP_MM') or 3)
+    os.makedirs(a.out, exist_ok=True)
+    kin = Kin(device=a.device)
+    from ml.common.ckpt import load_policy      # 2026-10-19：EMA 权重 + act_scale
+    model, ck = load_policy(a.ckpt, a.device)
+    assert ck.get('fp') in (None, kin.fp), '碰撞模型指纹与 checkpoint 不符'
+    pool = [t for t in load_tasks(a.samples[:1]) if t['split'] == 'train' and t.get('cat') not in ('D',)]
+    rng = random.Random(a.seed); rng.shuffle(pool); tasks = pool[:a.n]
+    out, stat = [], {'tasks': len(tasks), 'collided': 0, 'states': 0, 'rej_gap': 0, 'rej_near': 0}
+    for i in range(0, len(tasks), a.bs):
+        tb = tasks[i:i + a.bs]
+        with torch.no_grad():
+            _, per = rollout(model, kin, tb, a.device, K=8, safety=bool(a.safety), seed=a.seed * 100003 + i, return_traj=True,
+                            fb_gain=a.fb_gain, replan=a.replan, commit_n=a.commit_n, safety_partial=a.safety_partial)
+        tr = per['traj'].to(a.device)                                   # [B,T,6]
+        B, Tn, _ = tr.shape
+        _, T, R, _, _ = tasks_to_tensors(tb, a.device)
+        # 2026-10-19 修（用户实测）：原来一次喂 64 题 × 64 步 = 4096 点、cap=40 mm 给 kin.gaps，40 mm 内幸存的胶囊对太多，
+        # 峰值把显存 / 内存吃满。这里只需判断"≤0（碰撞）"和"> gap_min（起点地板）"，cap 取 gap_min+1 即可，
+        # 且按 GAP_CHUNK 个点分块，用完即释放。
+        cap = gap_min + 1.0
+        flat = tr.reshape(-1, 6)
+        with torch.no_grad():
+            g = torch.cat([kin.gaps(flat[s:s + GAP_CHUNK], cap)['gm'].min(-1).values for s in range(0, flat.shape[0], GAP_CHUNK)]).view(B, Tn)
+        del flat
+        for b, t in enumerate(tb):
+            hit = (g[b] <= 0).nonzero()
+            c = int(hit[0]) if hit.numel() else Tn
+            if hit.numel(): stat['collided'] += 1
+            cand = []
+            if hit.numel(): cand.append(max(0, c - int(round(0.2 / DT))))
+            lo = int(round(0.3 / DT))
+            if c - 1 > lo: cand.append(rng.randint(lo, c - 1))
+            for k in cand:
+                if g[b, k] <= gap_min: stat['rej_gap'] += 1; continue
+                q = tr[b, k:k + 1]; qprev = tr[b, max(0, k - 1)]
+                e, oe = goal_err(kin, q, T[b:b + 1], R[b:b + 1])
+                if e.item() < 5 and (not t.get('R') or oe.item() < 5): stat['rej_near'] += 1; continue
+                out.append({'q0': [round(v, 3) for v in q[0].tolist()], 'qPrev': [round(v, 3) for v in qprev.tolist()], 'T': t['T'], 'R': t.get('R'), 'cat': t.get('cat', 'A'),
+                            'src': {'tid': t['tid'], 'k': k, 'col': bool(hit.numel())}})
+        del tr, g, per
+        if a.device.startswith('cuda'): torch.cuda.empty_cache()
+        print(f'[dagger] {min(i + a.bs, len(tasks))}/{len(tasks)} 题，起点 {len(out)}', flush=True)
+    stat['states'] = len(out)
+    rng.shuffle(out)
+    per_part = (len(out) + a.parts - 1) // max(1, a.parts)
+    for p in range(a.parts):
+        chunk = out[p * per_part:(p + 1) * per_part]
+        if not chunk: continue
+        fn = os.path.join(a.out, 'tasks_%02d.jsonl' % (p + 1))
+        open(fn + '.tmp', 'w', encoding='utf-8').write(''.join(json.dumps(x) + '\n' for x in chunk)); os.replace(fn + '.tmp', fn)
+    json.dump(stat, open(os.path.join(a.out, 'collect.json'), 'w', encoding='utf-8'), indent=1)   # 最后写：它存在 = 采集完成
+    print(json.dumps(stat, ensure_ascii=False), flush=True)
+
+
+if __name__ == '__main__':
+    main()

ml/dagger/distill_fb.py

@@ -0,0 +1,57 @@
+#!/usr/bin/env python
+"""反馈蒸馏：用最终部署配置（目标反馈 + 安全层 + 部分前缀 + 每步规划）跑闭环，
+收集 (特征, 复合动作 = 模型输出 + 目标反馈) 样本，供 train.py 微调把反馈内化进策略。
+  PYTHONUTF8=1 python -m ml.dagger.distill_fb --ckpt ml/runs/base_dag2_dag1/best.pt --n 500 \
+      --fb_gain 1.8 --out ml/data/samples_fbdistill
+输出可直接被 ml.data.Samples 读取（collect.X/Y/V/SG/TID.npy；无 meta = act_scale 1.0，与主数据一致）。
+动作标签 = 候选动作（含反馈）的归一化 act（/STEP，clamp ±1），与主数据同口径。
+"""
+import argparse, os, random
+import numpy as np
+import torch
+
+from ml.common.ckpt import load_policy
+from ml.common.features import STEP
+from ml.common.kin_torch import Kin
+from ml.data import load_tasks
+from ml.sim.closed_loop import rollout
+
+
+def main():
+    ap = argparse.ArgumentParser()
+    ap.add_argument('--ckpt', required=True); ap.add_argument('--n', type=int, default=500)
+    ap.add_argument('--bs', type=int, default=64); ap.add_argument('--fb_gain', type=float, default=1.8)
+    ap.add_argument('--samples', default='ml/data/samples'); ap.add_argument('--out', required=True)
+    ap.add_argument('--device', default='cuda' if torch.cuda.is_available() else 'cpu'); ap.add_argument('--seed', type=int, default=1)
+    a = ap.parse_args()
+    dev = a.device
+    model, _ = load_policy(a.ckpt, dev)
+    kin = Kin(device=dev)
+    pool = [t for t in load_tasks([a.samples]) if t['split'] == 'train' and t.get('cat') not in ('D',)]
+    random.Random(a.seed).shuffle(pool); tasks = pool[:a.n]
+    stp = torch.tensor(STEP)   # collect 返回 CPU 张量，标签换算也在 CPU
+    X, Y, TID = [], [], []
+    for i in range(0, len(tasks), a.bs):
+        ch = tasks[i:i + a.bs]
+        coll = []
+        with torch.no_grad():
+            rollout(model, kin, ch, dev, K=8, safety=True, replan='empty', fb_gain=a.fb_gain,
+                    safety_partial=1, commit_n=1, seed=a.seed * 100003 + i, collect=coll)
+        for f, ac in coll:
+            X.append(f.numpy()); Y.append((ac / stp).clamp(-1, 1).numpy())
+        ncol = sum(f.shape[0] for f, _ in coll)
+        TID.append(np.arange(ncol, dtype=np.int32) + i * 100000)
+        print(f'[distill] {i + len(ch)}/{len(tasks)} tasks, samples {sum(x.shape[0] for x in X)}', flush=True)
+    os.makedirs(a.out, exist_ok=True)
+    X = np.concatenate(X); Y = np.concatenate(Y); TID = np.concatenate(TID)
+    n = X.shape[0]
+    np.save(os.path.join(a.out, 'collect.X.npy'), X.astype(np.float32))
+    np.save(os.path.join(a.out, 'collect.Y.npy'), Y.astype(np.float32))
+    np.save(os.path.join(a.out, 'collect.V.npy'), np.full(n, 0.5, np.float32))
+    np.save(os.path.join(a.out, 'collect.SG.npy'), np.zeros((n, 13), np.float32))
+    np.save(os.path.join(a.out, 'collect.TID.npy'), TID)
+    print(f'done: {n} samples, X {X.shape}, Y {Y.shape}', flush=True)
+
+
+if __name__ == '__main__':
+    main()