fix(LTX25-RETIRE-DEAD-ARMS): retire the invented refusals, and the assertion that could not fail (#644, #611)

.agents/issue-index.md

@@ -220,7 +220,14 @@ rather than merged. `scripts/check-agent-record.py` gates both.
 | [#442](https://github.com/mudler/vllm.cpp/issues/442) | `SPEC-DSPARK` | W8: capture the T=1+k speculative VERIFY shape (the measured 0.870x-0.981x gap) | perf |
 | [#513](https://github.com/mudler/vllm.cpp/issues/513) | `SPEC-DSPARK` | DFlash/DSpark draft loading hardcodes the VL weight prefix, so a text-only Qwen3.5 target cannot share its embedding | bug |
 | [#536](https://github.com/mudler/vllm.cpp/issues/536) | `ROAD-V1-C3` | C3's named tail records DSpark as unspiked three days after it landed, and files TLI under the wrong lane | bug |
+| [#611](https://github.com/mudler/vllm.cpp/issues/611) | `ROAD-V1-LTX25` | `duration_head_path` is accepted by `kKnownLoadExtras` and read by NOTHING, so a caller who points at a duration head silently gets the recipe default. Row `LTX25-RETIRE-DEAD-ARMS` (spec [`ltx25-retire-dead-arms.md`](specs/ltx25-retire-dead-arms.md)) refuses it by name and records the full accepted/read inventory of all ten extras. Stays open: constructing a duration head and the AUTO-duration path are still owed | bug |
+| [#691](https://github.com/mudler/vllm.cpp/issues/691) | `ROAD-V1-LTX25` | The LTX-2.5 out-of-scope ledger's reachable/marker split gates the MESSAGE TEXT, not reachability: give `kLoraFusion` a product call site and the ledger test still passes while the shipped refusal tells the caller `DECLARED, NOT REQUESTABLE` right after they requested it. Copy the anti-tautological shape of the extras inventory gate | bug |
+| [#692](https://github.com/mudler/vllm.cpp/issues/692) | `ROAD-V1-LTX25` | Campaign spec `ltx-2-5.md:291` still records the FABRICATED `multishot` arm as owed after row `LTX25-RETIRE-DEAD-ARMS` retired it; same line needs `CFG parallelism` renamed to multi-GPU. Operator-owned file, so filed rather than edited by that row | bug |
 | [#886](https://github.com/mudler/vllm.cpp/issues/886) | `POLICY-NOTHING-LANDS-DEAD` | The seam checkers police where a capability routes and nothing polices whether anything reaches it, so a change can land wired downward and driven only by its own test, as tensor parallelism did (guide [`reachability.md`](reachability.md)) | feature |
+| [#889](https://github.com/mudler/vllm.cpp/issues/889) | `LTX25-RETIRE-DEAD-ARMS` | `kBetaScheduler` shipped as a REACHABLE refusal in the header, `docs/FEATURES.md` and `docs/USAGE.md` with zero product callers: its site sits inside `Ltx2Schedule`, which nothing calls, and the engine calls `Ltx2SigmaSchedule` directly. Upstream constructs `BetaScheduler` nowhere either — all seven ltx-pipelines entry points hard-code `LTX2Scheduler()` — so it is reclassified as a marker rather than wired | bug |
+| [#890](https://github.com/mudler/vllm.cpp/issues/890) | `LTX25-RETIRE-DEAD-ARMS` | `ltx2_video.cpp`'s temporal-upsampler guard tested `temporal_upsample` alone, which every BOTH-flags config also satisfies, so a genuine spatiotemporal checkpoint was told it is the temporal x2 arm and the ledger refusal naming the spatiotemporal one was unreachable from a request. Narrowed to `temporal_upsample && !spatial_upsample`, with a both-flags fixture driven through `LoadVideoEngine` | bug |
+| [#892](https://github.com/mudler/vllm.cpp/issues/892) | `LTX25-RETIRE-DEAD-ARMS` | The `kMultiGpuParallelism` marker shipped "zero `cfg` hits in either multigpu tree" in the header and "three forms" in the user-visible refusal. At LTX-2 `fd4ded7f` it is 5 hits against 33 files as the control, and there is a fourth form, `BatchParallelGemmaBuilder` (`multigpu/bp_gemma_builder.py:42`). The spec's grep was path-filtered past `docs/multigpu/`, which is #604 again | bug |
+| [#893](https://github.com/mudler/vllm.cpp/issues/893) | `LTX25-RETIRE-DEAD-ARMS` | AGENTS.md `## Nothing lands dead` disclosure for the #889 repair: `Ltx2Schedule` is an unreached dispatcher whose only driver is its own unit test. No wiring wave is coming, because upstream selects no scheduler, so the open decision is retire-or-keep-as-recorded-mirror. Listed under `## Owed` in [`ltx25-retire-dead-arms.md`](specs/ltx25-retire-dead-arms.md) | bug |
 | [#896](https://github.com/mudler/vllm.cpp/issues/896) | — | No gate refuses a new unchecked `static_cast<...LoadedModel&>` in a registry entry point. The #847 sweep decided the checker is warranted — the class is exactly grep-able, unlike the unaligned-read class in #627, and it regrows the moment a new model port copies its neighbour — and deliberately did not bundle a repository-wide refusal gate into a 30-file mechanical sweep. Listed under `## Owed` in [`registry-downcast-sweep.md`](specs/registry-downcast-sweep.md) §6 | feature |
 | [#897](https://github.com/mudler/vllm.cpp/issues/897) | — | `ModelAs`'s `const LoadedModel&` overload has no caller anywhere in the tree: every registered `prepare`/`forward` takes a NON-const `LoadedModel&`, so all 35 call sites select the non-const overload and its `Model&` result merely binds to the `const auto&`. Proven by deleting the overload and compiling all 30 swept TUs `-fsyntax-only`. It is dead in the way that reads as covered — #847 cited its existence as the reason the 14 `const` sites needed no thought. Listed under `## Owed` in [`registry-downcast-sweep.md`](specs/registry-downcast-sweep.md) §3.3 | bug |
 | [#904](https://github.com/mudler/vllm.cpp/issues/904) | `ROAD-V1-LTX25` | `main` red on `sanitize-cpu (address,undefined)` for a THIRD reason after the two [#730](https://github.com/mudler/vllm.cpp/issues/730) enumerates, both of which are now closed: `~Ltx2DitDeviceWeights` frees the staged DiT buffers on the main thread (`ltx2_device.cpp:1088`) while a `vt::cpu` threadpool worker is still reading one inside `AddKernel` (`cpu_layernorm.cpp:33`), so the staged weights' lifetime is not joined to the in-flight parallel op that reads them. Deterministic, 5 runs / 5 aborts on unmodified `e8048ef63`; the rest of the suite is 477/478 and `test_ltx2_video` now PASSES | bug |