feat(vector): implement exact NFI indicator kernels

docs/native-vector-core.md

@@ -38,13 +38,41 @@ compiled lag or window. A discard sink demonstrates this live-value bound:
 batch_rows × (projected + intermediate + final columns) + bounded state
 ```
 
+## Exact indicator kernels
+
+M20-04 adds operation-driven implementations for every TA-Lib function reachable
+from NFI X7 at upstream `e857f9b6`: ADX, AROON, BBANDS, CCI, EMA, MAX, MFI, MIN,
+MINUS_DI, OBV, PLUS_DI, ROC, RSI, SMA, STDDEV, STOCHF, SUM, ULTOSC, and WILLR.
+Pandas rolling mean, sum, min, and max are also exact for every inventoried
+window, including the 2,016-candle window.
+
+The committed oracle contains 2,200 input rows, all 56 reachable TA-Lib parameter
+variants, and 24 rolling variants. Finite values compare by exact f64 bits; NaN
+warmup positions compare exactly and signal-boundary tests use no tolerance.
+Moving, directional, oscillator, and rolling state continues across arbitrary
+record-batch boundaries while retaining only period-scale memory.
+
+Regenerate the oracle from an inventory with:
+
+```bash
+uv run python scripts/generate_indicator_kernel_fixture.py \
+  .nfi/indicator-inventory.json \
+  benchmarks/reference/indicator-kernels/nfi-x7-e857f9b6-talib-v0.6.4.json
+```
+
+TA-Lib multi-output calls are represented by generic output names such as
+`aroondown`, `fastk`, or `upperband`; tuple assignment and constant output
+subscripts compile without Signal- or strategy-specific branches.
+
 ## Current claim boundary
 
-M20-03 provides the engine, typed columns, generic scalar operations, causal
-shift, rolling storage, and source-located fail-closed errors. TA-Lib indicators,
-rolling reducers, EWM algorithms, and the complete latest-NFI kernel set belong
-to M20-04 and require official Python/TA-Lib column-exact fixtures before Native
-promotion. An unimplemented reachable opcode stops; it is never guessed.
+The latest X7 indicator operation set now has exact Native kernels. This does not
+yet claim that the entire latest X7 source compiles: compilation currently stops
+at `strategy.py:3168:21` on an informative/config attribute that belongs to the
+source and multi-timeframe lowering work in M20-05. EWM remains fail-closed
+because it is not reachable in this upstream inventory. Unknown functions,
+non-SMA TA-Lib MA types, centered rolling windows, Arrow null indicator inputs,
+and unselected multi-output calls also stop rather than being guessed.
 
 The Rust boundary can validate a compiled contract directly:
 

planning/roadmap-state.json

@@ -1,8 +1,8 @@
 {
   "schema_version": "1.0.0",
   "roadmap_id": "nfi-backtest-engine-post-v1.1.0",
-  "revision": 129,
-  "updated_at": "2026-08-10T23:08:02+09:00",
+  "revision": 131,
+  "updated_at": "2026-08-11T00:55:12+09:00",
   "acceptance_commands": "planning/acceptance-commands.json",
   "active_task_id": null,
   "execution_policy": {
@@ -4730,7 +4730,7 @@
       "order": 2004,
       "milestone": "M20",
       "title": "Implement all NFI-reachable indicator kernels",
-      "status": "pending",
+      "status": "completed",
       "depends_on": [
         "M20-03"
       ],
@@ -4748,10 +4748,18 @@
         "column-exact vector fixtures",
         "boundary-sensitive signal tests"
       ],
-      "started_at": null,
-      "completed_at": null,
-      "commit_sha": null,
-      "evidence": [],
+      "started_at": "2026-08-11T00:08:20+09:00",
+      "completed_at": "2026-08-11T00:55:12+09:00",
+      "commit_sha": "d589e53b71681c01f2b487a4bbfa5d9c5617d036",
+      "evidence": [
+        ".nfi/roadmap-acceptance/M20-04/d589e53b71681c01f2b487a4bbfa5d9c5617d036/acceptance-report.json",
+        ".nfi/roadmap-acceptance/M20-04/d589e53b71681c01f2b487a4bbfa5d9c5617d036/kernel-oracle-report.json",
+        ".nfi/roadmap-acceptance/M20-04/d589e53b71681c01f2b487a4bbfa5d9c5617d036/latest-program-gap.json",
+        ".nfi/roadmap-acceptance/M20-04/d589e53b71681c01f2b487a4bbfa5d9c5617d036/SHA256SUMS.txt",
+        ".nfi/roadmap-acceptance/M20-04/d589e53b71681c01f2b487a4bbfa5d9c5617d036/x7-spot/run.json",
+        ".nfi/roadmap-acceptance/M20-04/d589e53b71681c01f2b487a4bbfa5d9c5617d036/x7-futures/run.json",
+        "benchmarks/reference/indicator-kernels/nfi-x7-e857f9b6-talib-v0.6.4.json"
+      ],
       "blocker": null
     },
     {
@@ -8292,6 +8300,54 @@
         "next_eligible_task": "M20-04",
         "next_task_manual_gate": false
       }
+    },
+    {
+      "sequence": 177,
+      "timestamp": "2026-08-11T00:08:20+09:00",
+      "task_id": "M20-04",
+      "event": "task_started",
+      "details": {
+        "objective": "implement every latest-NFI-reachable indicator kernel with column-exact Python and TA-Lib shadow evidence",
+        "latest_upstream_must_be_frozen": true,
+        "zero_tolerance_native_promotion": true,
+        "unverified_numerical_substitutions_allowed": false,
+        "strategy_or_signal_hardcoding_allowed": false,
+        "kernel_dispatch_must_be_operation_driven": true
+      }
+    },
+    {
+      "sequence": 178,
+      "timestamp": "2026-08-11T00:55:12+09:00",
+      "task_id": "M20-04",
+      "event": "task_completed",
+      "details": {
+        "implementation_commit": "d589e53b71681c01f2b487a4bbfa5d9c5617d036",
+        "latest_upstream_commit": "e857f9b687189b5a4634abbb02b257c1d70df84a",
+        "latest_strategy_sha256": "3c9a27500ee8cb01d3bc35903a3bd44b5892383b1eafb0f10a3d332e3c5a5974",
+        "inventory_fingerprint": "f09bc6b043f160058f21a2b638a37de5fa056b94595271664ce61ac601fd10fb",
+        "oracle_fingerprint": "f1fc94e7f1496e21258fb94907194135870ace2fc144660160b6904a64ccf321",
+        "oracle_rows": 2200,
+        "talib_operation_count": 19,
+        "talib_parameter_variant_count": 56,
+        "pandas_rolling_variant_count": 24,
+        "column_and_warmup_exact": true,
+        "tolerance_used": false,
+        "streaming_chunk_exact": true,
+        "bounded_state": true,
+        "python_test_count": 732,
+        "future_compatibility_test_count": 134,
+        "rust_workspace_test_count": 195,
+        "spot_trade_surface_and_full_state_exact": true,
+        "futures_trade_surface_and_full_state_exact": true,
+        "runtime_hardcoding_added": false,
+        "unsafe_rust_added": false,
+        "latest_x7_fully_compiled": false,
+        "latest_x7_fail_closed_source": "strategy.py:3168:21",
+        "all_latest_nfi_reachable_indicator_kernels_exact": true,
+        "full_native_strategy_claim": false,
+        "next_eligible_task": "M20-05",
+        "next_task_manual_gate": false
+      }
     }
   ]
 }