# Decisions One entry per decision that outlives the container it was made in. Newest last. A decision that lives only in an agent's context is lost when that container dies, which is what this file is for. --- ## P0 — the exporter, 2026-08-28 ### The exporter reads one authored file, and stamps its provenance into the output `export/` is derived and `authored/` is hand-written, and the natural reading of that is that the exporter never touches `authored/`. But a screen has to be *called* something, and the disc does not name its builds — the identification of build 5 as the main menu is HANDOFF Q2, **measured against a live capture**, not a field. Two ways to handle that: 1. the exporter emits `build_05.json` and the runtime renames it from `authored/screen_names.json`; 2. the exporter reads that map and writes `main_menu.json` directly. Chose **2**, with a condition: every name it applies carries `name_source: "authored"` and a `name_why` quoting the evidence, and `check` **rejects** an authored name with no `why`. The file that lands in `export/` is therefore still honest about which of its fields is a measurement — which is the property the derived/authored split exists to protect — while a human opening the tree sees `main_menu.json` rather than having to resolve a rename in their head. A build nobody has identified exports as `build_NN` with `name_source: "index"`, which is a locator and not a claim. This is the **only** authored input the exporter takes. Everything else in `authored/` is applied by the runtime over `export/`. ### Sprites are per screen, not a flat pool `main_menu` and `extras` both ship a `ptbase.t32` and they are different pictures. A flat `sprites/` directory would have silently collided; whichever screen exported second would have won, and the loser would have drawn the wrong background with no error anywhere. `sprites///.png`. ### The format is executable `sylpheed-export check --out export` validates a tree against `docs/FORMAT.md` with no disc in hand. It exists because "the export is correct" is otherwise an assertion, and because the P0 gate is *"validates against FORMAT.md"* — which is not a thing anyone can confirm by reading. It reads the tree the way Godot will: as a stranger, with no access to the disc, the decoders, or the exporter's internals. It deliberately does **not** check the export against the disc — that is what `sylpheed-cli screen render` is for, at P1. Checked that it bites, rather than assuming: five mutations of a valid `main_menu.json` — a broken `paint_order` permutation, a dangling `focus_sprite`, a reversed `buttons` list, a `#rrggbbaa` colour, an invented `name_source` — are each caught with a specific message. ### The highlight sprite pairs by name; `opt ` is exported but not believed FORMAT v1 said `focus_sprite` came from the element's `opt ` link. That reading was **measured and refuted** by the RE agent, and this export shows why plainly: on the main menu, `opt ` chains `ptloop01 → ptloop02 → ptbtn01` — two decorations and then a button. It is a linked list of something, and it is not focus. The highlight is paired by **sprite name** instead (`ptbtn01.t32` ↔ `ptbtn01f.t32`), which is HANDOFF's convention and holds for all 54 real pairs on the disc. It resolves all five main-menu buttons. The raw link is still exported as `opt_link`, renamed so that nothing downstream mistakes it for navigation, and so that whoever eventually decodes it has the data. Note this is 🟡 a naming convention, not a decoded field. It is authored in effect, and lives in the exporter only because it is a rule over disc data rather than a value we chose. ### The paint order is exported, not authored Q3 decoded it — a `u16` layer key at `+0x0A` of each `T8aD` sprite header, stable-sorted with declaration index. So it is read in the exporter, per the contract's own rule for a decoded answer, and `paint_order` in `export/` is a derived field. `"paint_order"` is gone from `unresolved`; **`paint_order_ties` replaces it**, because the tie-break is still unknown and costs one element's blend on one screen. Where an element has no `T8aD` header the key comes from the decoders' table of keys **measured off the running game**. That is a different kind of fact, so it is labelled: `layer_source` is `"sprite"`, `"implied"` or `"none"`, and a consumer that needs to know whether a layer is read or measured can tell. ### Colours are exported as two fields with the byte order in the name There are two modulate colours and they multiply: `tint` is RGBA, `fade` is **ARGB** and its high byte is the alpha that ramps. v1's single `"#ffffffff"` could not carry both and silently discarded the ramping alpha. They are exported as `tint_rgba` and `fade_argb`, raw hex, byte order in the key — because getting it backwards is silent and looks like an art bug rather than a parse bug. ### `t` stays raw HANDOFF Q1 is answered — linear ramp, 2 units per rendered frame, working conversion 1 unit = 1/60 s — but that conversion is **measured off the running game, not read from the file**, and the finding itself flags the 27.6 present- frames/second measurement as the part worth re-testing. If the game turns out to present at 60 Hz, every duration halves. So `t` is exported exactly as the disc spells it, `keyframe_time_unit` stays in `unresolved`, and the conversion will live in one authored place at P2. One constant to change, in a file that says it is a decision. ### The final keyframe has no `t`, and `check` enforces that The disc has no time slot on the last keyframe of a group. A file that carries one there has invented it. `check` rejects it — this is the one place where the temptation to emit a plausible number is strongest and the resulting error is completely invisible. --- ## P1 — Godot draws the screen, 2026-08-28 ### The Godot side reads the manifest, not a path `ExportTree` is the only class that knows where `export/` is: `SYLPHEED_EXPORT` if set, otherwise `/../export`. Screens are addressed by their manifest **name** (`main_menu`), never by a file path, so the runtime never encodes the archive's subdirectory and a re-export that moves a file does not break it. It also checks `format` on both the manifest and each screen, and refuses a tree it was not built to read rather than half-drawing one. Textures are read as bytes and decoded with `load_png_from_buffer` at runtime. They are deliberately **not** Godot-imported resources: `export/` is gitignored and regenerated wholesale, and a `.import` sidecar per sprite would be derived state living next to derived state, invalidated on every re-export. ### One CanvasItem draws the whole screen `ScreenView._draw` walks `paint_order` and draws each element itself, rather than making a node per element and leaning on `z_index`. The export's `paint_order` is already back-to-front, so honouring it is a loop; expressing the same order through sixteen nodes' z-indices would hide the one thing that is still unresolved about it — the **ties** — behind Godot's own sibling rules, where a change in the export would silently become a change in Godot's tree order instead of a visible change in the draw sequence. ### P1 draws `rest` and nothing else Every element is drawn at its resting pose. No keyframe interpolation: that is P2, and it depends on the keyframe time unit, which is **measured** rather than decoded. A milestone whose gate is a pixel diff must not have a measured constant inside it, or the diff stops being evidence about the port. For the same reason `focused_id` is empty at P1. Initial focus was measured as unstable boot to boot (HANDOFF Q5), so choosing one is an authored decision and it belongs to P5, where a human is pressing keys. ### Nearest-neighbour, and why that is not a preference `TEXTURE_FILTER_NEAREST`. The export is a 1:1 copy of the disc's own texels and elements draw at up to 500 %; a bilinear filter invents detail the disc does not have. It is also what the reference renderer does — `ui_layout::blit` maps destination to source by integer division — so a filter difference cannot masquerade as a placement difference in the diff. ### The capture is the SubViewport, not the window The screen is drawn into a `SubViewport` sized to the export's own `design` rectangle and shown through a container that scales it to the window. The first attempt captured `get_viewport()` and got **1235×695**: there is a window manager on the Xvfb display and its title bar had eaten 45×25 px of a screen the export declares as 1280×720. A gate that compares a rescaled 1235×695 capture against a 1280×720 composite measures the compositor. So `--capture` grabs the SubViewport texture: exactly the design rectangle, independent of the window, directly comparable with `screen render` with no crop and no resample. The windowed run is still worth doing — it is what proves a human sees the screen — but it is not what the numbers come from. ## P1 gate — the diff, and what it found `tools/verify-screen` renders every screen in the manifest both ways and reports the largest per-channel difference anywhere in the frame. Both renderers are held to the same inputs: the reference CLI built by `build-reference-cli` from the revision the exporter is **pinned** to (not `/reborn/target/`, which is a live mount that moves mid-iteration), `--black` because the screen carries its own background, and `--primitives --animated` because those are what make the CLI draw the same element set the port draws at rest. | screen | build | max per-channel Δ | | |---|---|---|---| | `main_menu` | 5 | **3** | the P0/P1 gate screen | | `main_menu_jp` | 8 | 3 | | | `extras` / `extras_jp` | 6 / 9 | 4 / 3 | | | `press_start` / `press_start_jp` | 2 / 3 | 1 | | | `build_00` / `build_01` | 0 / 1 | 3 | | | `build_10` / `build_11` | 10 / 11 | **0** | byte-identical | | `title` | 4 | 6 | paint-order tie, below | | `title_jp` | 7 | 154 | sampling phase, below | `main_menu` — the milestone's own gate — agrees to **≤3/255 on every channel of every pixel**, RMSE 0.38 %, with **no** pixel differing by more than 4 %. 3/255 is what integer-truncating compositing in the CLI and float rounding on a GPU differ by; there is no structural disagreement anywhere in the frame. Three screens exceed that, and each has a named cause rather than a threshold. ### `title`: a tie in the paint order — neither renderer is wrong Build 4 is the one screen where the CLI uses a paint order **measured off the running game** instead of deriving it. Compared against the order this port exports, every single disagreement is **inside a tie** — the two orders differ only among elements carrying *identical* layer keys (`0x8083`, the `back2` glow group, and `0x80a0`): ``` derived : … 15, 16, 17, 18, 0, 1, 2, 3, 4, 5, 7, … measured: … 15, 18, 16, 17, 0, 2, 4, 7, 1, 3, 5, … ``` That is exactly the residual HANDOFF Q3 documents and this export already declares in `unresolved: ["paint_order_ties"]`. It is worth stating what it costs: **904 px** in the glow band at (445,117)–(1195,313), all of them 4–6/255. The port keeps the stable sort, per HANDOFF's own recommendation. Nothing to fix, and nothing to tune — a "fix" here would be fitting the port to one screen's capture. Two of the reordered indices (`0x80a0`) are `kind & 0x4` template instances that both renderers skip, so the only real reorder outside the glow group is `ptlogo2` against `ptlogo_tm`, which do not overlap. ### `title_jp`: nearest-neighbour sampling phase — the CLI is the one I would call wrong `title_jp` is the **only** screen in the export with a drawn element at a scale that is not a whole multiple of 100 %: `ptlogo_eff2` at 125 %. It is also the only screen with a difference above 6/255. The two facts are the same fact. At a non-integer ratio the two renderers pick different source texels: * `ui_layout::blit` samples the source at the destination pixel's **top-left corner** — `sxi = col * sw / dw`. * A GPU samples at the destination pixel's **centre** — `floor((col+0.5)·sw/dw)`. At 125 % those disagree on one column in five, which is why the differing pixels are ~30 above 100/255 strung along thin diagonal edges rather than a shifted region. At every whole multiple of 100 % they agree exactly, which is why the other eleven screens are clean. **Which is wrong:** the CLI, I think. Corner-sampled nearest is a half- destination-pixel bias toward the top-left that no rasteriser produces, and the Xenon GPU that drew this screen sampled at pixel centres. But I have no framebuffer capture of `title_jp` and the disagreement is sub-pixel on one glow, so this is a reading, not a measurement — recorded in `docs/BLOCKED.md` rather than acted on. **The port is not changing to match**, because matching the CLI here would mean deliberately reproducing a half-pixel offset in order to make a number smaller. ### `extras`: two pixels Two pixels at 4/255. Rounding. ### What the diff cannot tell us The pivot question in `docs/BLOCKED.md` predicted that a P1 diff could not distinguish "anchor scale to the declared pivot" from "anchor to half the texture", because both renderers use the declared pivot. That prediction held: the port and the CLI agree on every scaled element, and that agreement is **not evidence** about which anchor the game uses. It stays open. ### ~~`pteff05.t32` and `pteff04.t32` have no sprite, and that is correct~~ **RETRACTED 2026-08-29. This was wrong, and it was the most consequential thing on this page.** See "The menu had no background" below. --- ## P2 — keyframe animation, 2026-08-28 ### The time unit is authored, in one file, and says loudly that it is not on the disc `authored/timing.json`. HANDOFF Q1 is answered — linear ramp, 2 units per rendered frame, 1 unit = 1/60 s — but that conversion is **measured off the running game**, not read from a file, which is exactly the case the derived/authored split exists for. It is expressed as `keyframe_units_per_second: 60` rather than seconds-per-unit so the value is exact instead of a repeating decimal, and it carries the two independent lines that support it. `t` stays raw everywhere in `export/`; seconds appear only where this file is applied, which is one line of `boot.gd`. `exit_ramp_seconds` is deliberately **null**. See below. ### The timeline stops at the last *timed* keyframe, and never plays the exit The last keyframe of every group carries **no `t`** — the disc has no time slot there. Across this export that final frame is an *exit* pose: for 116 of 134 elements it differs from the last timed keyframe **in alpha only** (a fade-out), for 12 it is the loading splash's scale-and-slide exit, and for 6 it is identical (no exit animation at all). So the group is `pre-roll → ramp in → hold → [exit]`, and the port plays it up to the hold and stops. Playing into the exit would mean **inventing how long the ramp takes**, because the disc does not say. That duration is the screen transition — HANDOFF Q7 measured it at ~0.4 s — and it belongs to P3, with its own evidence. This is why `exit_ramp_seconds` is null rather than 0.4: P2 has no business holding it. ### The interpolation is checked by where it lands, not by inspection For **8 of the 12** screens the settled timeline is **byte-identical** to the `--pose=rest` render. That is the useful assertion: the port walks the keyframes with an authored time unit and arrives, to the pixel, at the pose the pinned decoders independently identify as the resting one. `tools/screen-strip` reports this per screen, so a change to the interpolation that drifts by one unit shows up as a diff rather than as nothing. The four that differ do so for two distinct reasons, below. ## `rest` misidentifies six elements, and the running game says so On `main_menu`, the settled timeline and `rest` differ in exactly one region: **400×470 at (440,108)** — the bounding box of `ptframe1` and `ptframe2`, and nothing else on the screen. `rest` puts both at their **first** keyframe: off-position and fully transparent. The keyframes say they slide (620,108)→(440,108) and (403,267)→ (583,267) while fading 0x00→0xff, and then hold that pose for their last three keyframes including the untimed one. `/reborn/docs/re/captures/main-menu-oracle.png`, a capture of the running game, **shows them**: the bright circuit-frame bracket around the menu, with a ring at the bottom right. Cropping the same 250×180 region from the capture and from both renders puts the ring and its elbow trace in the port's timeline render **pixel-aligned with the game's**, and absent from the `rest` render. That is geometry, not luminance, so it does not depend on the capture's gamma or on the fact that it was taken with `NEW GAME` focused. ### Why the decoders get it wrong, precisely `ui_layout::rest_plateau` excludes a run of identical keyframes that **ends the group**, because that run is normally the exit — the comment cites the pause menu, where taking the trailing run erased the word PAUSE. That exclusion is right in general and wrong for an element with **no exit animation**, where the trailing run *is* the hold. The rule then falls back to an earlier run, which for a slide-in is the invisible pre-roll. The condition that identifies the affected elements exactly, with no false positives in this export, is: > the final untimed keyframe has the **same pose** as the last timed keyframe Six elements match it and `rest` misses all six: `ptframe1`/`ptframe2` on `main_menu` and `main_menu_jp`, and `pteff02` on `title` and `title_jp`. This is a **finding for the RE agent** about `sylpheed-formats`, not something this port fixes: the decoders are pinned and must not be reimplemented here. The port simply does not use `rest` — it derives the arrived pose from the keyframes, which needs no heuristic — and `verify-screen` still asks for `--pose=rest` so that renderer-vs-renderer diffing compares like with like. Note what this says about P1: the port and the reference renderer **agreed** on `main_menu` to 3/255, and both were missing two elements the game draws. Two renderers reading the same field through the same decoder agreeing is not evidence that the field is right. `docs/BLOCKED.md` had already said that about the pivot; here it bit for real. ## The title is not settled, and P2 does not claim it `title` and `title_jp` differ between the two modes by much more (max 142 and 247), and there the disagreement is **not** the six-element bug alone. `rest` picks a mid-timeline hold for several glows (`pteff01`, `ptlogoall_eff`, `ptlogoall_eff2`, `ptlogo_back2eff5`) where the timeline runs on to a much brighter pose. I could not settle which is right, and did not try to make the numbers agree: * No element's alpha ever reverses direction anywhere in this export, so the title's 4.48 s timeline is a slow one-way ramp, not a pulse — which removes the obvious reason to expect a loop, but does not prove there is none. * The only live title capture composites the **`PRESS Ⓐ` plate (build 2) over the title (build 4)**, so it cannot be diffed against build 4 alone. Mean luminance is oracle 64.1, `rest` 62.8, timeline 80.0 — which looks like it favours `rest`, except that the plate *adds* brightness and `rest` is carrying a 25 % black dim quad (`pteff02`) that is itself one of the six misidentified elements. The comparison is confounded in both directions and settles nothing. * **Both modes are visibly wrong anyway.** Side by side with the capture, the port draws a washed-out cyan glow slab across the logo that the running game does not have — in `rest` mode too. That is a third problem, independent of this one, and it is P3's. So: the timeline is the default because it is derived from the disc's own keyframes with one measured constant and no heuristic, and because it is proven right on the screen this milestone gates. On the title it is **unverified**, and P3 should not assume P2 settled it. --- ## P2, corrected — the pin moved, and the settle rule was wrong, 2026-08-28 ### Answering the RE agent's question: which six, and on what screens They asked, having found only two elements on the English main menu satisfying the condition this port proposed. The six span the whole 12-screen export: | element | screens | trailing run | |---|---|---| | `ptframe1`, `ptframe2` | `main_menu`, `main_menu_jp` | alpha `0xff` — **visible** | | `pteff02` | `title`, `title_jp` | alpha `0x00` — **transparent** | So four of the six are the pair they already found, once per language build, and their alpha rule accepts exactly those. The other two are `pteff02`, whose trailing run is transparent, so their rule **excludes** it and leaves `rest` at `0x40`. **That exclusion is right, and their own measurement proves it.** `pteff02` is the 25 % dim quad; they measured the title render going from **+13.14 to +0.55** against the plate-free capture once the dim is drawn. `rest` must therefore stay at `0x40` and must *not* move to the transparent trailing run — which is what their rule does. Two investigations converging from opposite directions. The condition this port proposed was **too loose**; the alpha discriminator is the correct rule and the port has no amendment to offer. ### The pin moved 8b6dbcf → 5414db3 Its own commit, and what I wanted from it is the fixed `ui_layout::rest()`. Pinned at `5414db3` rather than `4bc9706` where the fix was written, because `5414db3` is where it carries its disc-wide check — 30 of 13 991 elements move, 4 become visible, **0 become invisible**. The re-export is the evidence the change was contained: **two files changed, and within them exactly four `rest` blocks** — `ptframe1`/`ptframe2` on both main menus moving from `(620,108)/(403,267)` at `t=16` and alpha `0x00` to `(440,108)/(583,267)` at `t=62` and alpha `0xff`. Every diff line pairs; the other ten screens are byte-identical, `pteff02` did not move, and no sprite changed. ### The settle rule was wrong, and their title finding is what showed it P2 shipped "hold the last **timed** keyframe", on the reasoning that the exit is the final untimed frame. **That is wrong**, and the title is the counter-example: `pteff02` holds at `t=46` with the dim at alpha `0x40` and then ramps to `0x00` by `t=236`. The exit is not only the untimed frame — it can be a long run of timed ones. Running to the end drops the dim and makes the whole screen ~13/255 too bright, which is exactly the luminance excess P2 recorded (oracle 64.1, `rest` 62.8, timeline 80.0) and could not explain. A group is `pre-roll → ramp in → hold → ramp out → post-roll`, and a screen that has arrived sits on **the hold**. So the timeline now plays in and stops at `rest`, which is the decoders' identification of that hold and carries its own `t`. `settle_units()` is `rest.t`. The check is that the disagreement vanishes: on **all twelve** screens the settled timeline is now byte-identical to the `--pose=rest` render, where before this change four of them differed by up to 247/255. The timeline's endpoint *should* be `rest` — the animation is what the timeline adds, not a different destination — so this is the property to want, and it now holds without a special case. That also retires P2's open question about looping, from the other side: the RE agent measured that groups hold rather than loop (`ptloop01`/`ptloop02` park off-screen at x=1521 and x=−839; 18 s of settled title sits at sd ≤ 0.01). ## The reference renderer was stale for three diff runs Worth recording as a process failure, because it defeated the project's whole verification method for a while and it failed *silently*. After bumping the pin I rebuilt the reference CLI, and `build-reference-cli` reported success at rev `5414db3`. `verify-screen` then showed `main_menu` jumping from 3/255 to **72/255**. The natural reading — the port had regressed — was wrong. The port was right and **the reference was a revision behind**: the shared `CARGO_TARGET_DIR` still held a `sylpheed-cli` built from `8b6dbcf`, and cargo reported `Finished in 0.13s` and left it in place. Building into a clean target directory produced a binary that resolves `ptframe1` to `(440,108) t=62`; the shared one still said `(620,108) t=16`. The old check — "does `screen list` run?" — cannot catch this, because a stale binary runs perfectly. Two changes: * `build-reference-cli` builds into `$CARGO_TARGET_DIR/reference-cli/$rev`, a tree **keyed by the pinned revision**, so a new pin has no artifacts to reuse. A stable copy is placed alongside for consumers. * It then checks the binary **against `export/`**: both come from the same pin, so if the CLI resolves `ptframe1`'s rest differently from what the exporter wrote, the two halves of the verification are not the same revision and it fails loudly. It compares the two rather than asserting a literal, so it stays true when the pin moves again. `docker/bin/` is baked into the image, so this takes effect on the next image build; until then the repo copy has to be invoked by path. The RE agent hit the same class of trap this session from the other side (`./target/debug` stale against a redirected `CARGO_TARGET_DIR`). It is worth naming the general shape: **a build system reporting success is not evidence that the artifact you are about to trust is the code you pinned.** ### What this did not change `title` (6/255), `extras` (4/255) and `title_jp` (154/255) are unchanged, and their diagnoses stand — a paint-order tie, two pixels, and nearest-neighbour sampling phase at 125 % scale. The title's swoosh defect the RE agent localised (drawn thick and white where the game draws it thin and pink) is untouched by any of this and remains P3's. --- ## The menu had no background, and P1 called that correct, 2026-08-29 The pin moved `5414db3 → f817dd5` for `56cc7ac`, "a RATC child's name is stated, not inferred". `ratc::parse` had named each child by scanning backwards for the last printable run of bytes before its magic. For `pteff05.t32` the three trailing payload bytes are `38 41 58` — `8AX` — which beat the real name, so the child registered under a name no element declares and resolved to no sprite. `pteff05.t32` is the **full-resolution background of all five menu screens**. So every render this port has produced of a menu screen has been missing its background, and P1 wrote that up as a property of the disc: *"the bundle declares them and carries zero RATC children for either, so there is no texture on the disc to export."* That sentence was false. The bundle carries the child; the decoder was handing back the wrong name for it. Retracted above rather than edited away. ### What the re-export shows Six new sprites and nothing else: `pteff05.png` on `main_menu`, `extras` and their Japanese twins, `pteff04.png` on both titles. Per screen the JSON gains a `sprite` line and `layer_source` moves `"implied" → "sprite"` — the layer key is now **read from the file** instead of taken from the decoders' table of keys measured off the running game. That is the derived/authored ratchet turning the right way, in the exporter rather than in `authored/`. `pteff05.png` is **1280×720**; `ptbase.png`, which had been carrying the background alone, is 640×360 drawn at 200 %. The screen was being shown its own art at half resolution. ### Measured against the live capture, not against the other renderer Whole-frame RMSE of the settled `main_menu` against `captures/main-menu-oracle.png`: | | RMSE | |---|---| | before this pin | 8.05 % | | with the real background | **5.92 %** | A 26 % reduction, and it is the right kind of evidence: the reference renderer was missing the same element for the same reason, so a renderer-vs-renderer diff could not have found this. It is the third time on this project that the capture caught something both renderers agreed on — the bracket, the title dim quad, and now the background. `verify-screen` after the bump is unchanged in character: everything at 3–4/255 except `title` (6, the paint-order tie) and `title_jp` (155, the sampling phase). Both renderers gained the background together. ### One thing the comparison says that I did not expect Rendering with `--focus=ptbtn01`, which is how the capture was taken, makes the RMSE **worse** — 5.92 % → 7.00 %. The port *replaces* an element's sprite with its `*f` twin; `sylpheed-cli`'s own `--focus` is documented as drawing the focused record **over** the base element. Those are different operations, and the capture shows a ring marker beside `NEW GAME` that the port does not draw. This is P5's, not P2's, and it is not being guessed at here. Raised in `docs/BLOCKED.md`. --- ## P3 — splash → title, unattended, 2026-08-29 ### The splash is located by entry index, because no rule can find it The RE agent looked for a content predicate and there is none: design size fails (every extra composable bundle sampled is 1280×720, the same as every screen) and element count fails (fragments run 2…15 elements in `GP_OPTIONS`/`GP_SAVE_LOAD` while the splash halves are 3 and 7 — the ranges overlap). So `screen_builds` is now `is_build` **plus an authored allow-list of entry indices**, in `authored/screen_names.json` under `also_export`, each with a `why` that says it is a locator and not a claim. This is safe in `GP_TITLE` and would not be in general: there, widening adds exactly four bundles and all four are real screens with zero fragments. That is why it is an allow-list rather than a loosened predicate. **There were two splash screens and the port had neither.** Entries 11/14 are the developer logos (GAME ARTS / SETA / studio anima); entries **10/13 are the SQUARE ENIX publisher wordmark, the first thing the boot shows**, and nothing in this project had noticed them. Both pairs are region twins — ™ on 10, ® on 13 — and the port shows one of each, not both. ### `authored/screen_names.json` is now keyed by pak entry, not by ordinal Widening the enumeration renumbers the ordinals, and a name that moves when the enumeration rule changes is not a name. The file had always called the entry "the stronger locator"; it is now the only stable one. In `GP_TITLE` the two coincide across all 16 entries, which is also the numbering `sylpheed-cli screen --build N --all` takes — so `verify-screen` now passes `--all`, and without it `--build 10` would have landed on entry 12. The two previously-unnamed plates therefore renamed `build_10`/`build_11` → `build_12`/`build_15`. Their names were always locators; now they locate the right thing. ### The exit is the group playing itself out, not a black rect over a freeze HANDOFF's answer to ask 2 was (a), and it came with a test that discriminates rather than a plausibility argument. Under "a black quad over a frozen screen" every region is scaled by the same 1−α, so the button-region / background-region brightness **ratio** stays constant through the fade. Measured, it falls 6.495 → 5.574 → 3.105 → 2.125 → 1.935 — a 3.4× monotonic drop. The screen plays out: `pteff00.prm` ramps to opaque black while the labels, `ptmsg`, `pteff10` and `pteff12` ramp to transparent, and `ptframe1`/`ptframe2` hold. Implemented by giving the final untimed keyframe a **synthetic time**, `exit_ramp_units` after the last timed one, and then interpolating it like any other. One code path: the difference between arriving and leaving is only how far `t` is allowed to run, not a second kind of animation. `exit_ramp_units = 24` (~0.4 s) is authored, and `authored/timing.json` carries the RE agent's own reach caveat rather than smoothing it: the filmstrip is downsampled and the button region contains some background, so this pins the **direction**, not 0.4 s to ±0.05 s, and it is one transition pair. ### Nothing waits on a timer the disc does not carry `dwell` in `authored/flow.json` is deliberately empty. Each screen's dwell is its own keyframe group — the publisher wordmark reaches its hold at t=235 (3.92 s), the developer logos at t=190 (3.17 s), both read from the disc. Adding a hold on top would be inventing a number nobody measured. The pacing you see is the disc's own, and the file says where a measured number would go. ### The last screen holds A screen plays itself out because something is taking its place. Nothing takes the title's place yet, so the sequencer holds there. A boot that ends by fading to black is a boot that looks like it crashed. P4 puts the intro video in front of the title and P5 gives the title somewhere to go. ### `flow.json` reproduces an observation and says so Q6 closed with a negative: the order is in none of the four places it could have been, and a transition is a call with a name argument chosen by code. So this file is authored and its header says plainly that it reproduces what was watched, not what any file states. The intro video's place in the real boot is **named as a gap** rather than the order being quietly rewritten to hide it. ## P3 gate `godot --path port -- --boot --film=/tmp/boot` runs unattended: ``` publisher_logo → developer_logos at 4.65 s → title at 8.57 s boot sequence complete after 13.05 s, holding on title ``` The filmstrip shows each screen fading in, holding, and fading through black into the next, and the title staying up. `verify-screen` covers all **16** screens now; the four new splash bundles come in at max 1–2/255 against the reference renderer. The three known differences are unchanged: `title` 6 (paint-order tie), `main_menu` 4, `title_jp` 155 (sampling phase at 125 % scale). ## Answers taken from the RE agent without re-deriving them * **Focus stays "replace".** Over-vs-instead is unobservable: the focused sprite covers the base at 100 % of base-visible pixels, and the two compositions differ by RMSE 1.1 inside the button rect — under the gamma floor. The port's guess was right for the wrong reason, and the actual gap is that `ptbtn0Nf.rat` declares **two** sprites — `ptbtneff01.t32`, a glowing ring, and then the bright label — where `ptbtn0N.rat` declares one. The ring is P5's, and its placement inside the record is **not decoded**, so it will be authored from the capture and marked as such. * **RMSE against captures has a floor, so stop chasing it.** The capture is `≈ 255·(render/255)^γ` with γ ≈ 1.49 on the menu and `EXTRAS`, 1.34 on the title, and it is a ramp *the game installed* (`VdGetCurrentDisplayGamma` at video init), not a capture-path artefact to subtract. Its reach is narrow — the flat patches it was fitted on are almost all dark — so the port will not extrapolate it across the range, and will not apply it to rendered output on this evidence. It is a comparison constant, not a rendering one. * **Rotation is escalated to a human and the port has not acted.** The RE half is answered — rotate about the **declared pivot**, measured against the GPU capture — and it has zero effect on the five screens at rest. The port will carry `rotation_deg` in a future FORMAT v3 because carrying a decoded field the renderer ignores beats dropping it, but it will not draw it until the divergence question is settled. --- ## P4 — the intro video, 2026-08-29 ### Theora at 720p is fine here, and no runtime dependency is requested MISSION §6 anticipated that Theora might be too poor at 720p and permitted the FFmpeg-GDExtension fallback to be **proposed**. It is not needed, and this was measured rather than judged by eye alone. SSIM against the decoded source over a 10 s sample: **0.9863 at `-q:v 6`, 0.9896 at 8, 0.9924 at 10**. At 200 % zoom on the reel's hardest case — fine serif text and soft gradients over near-black, where Theora breaks first — q8 is indistinguishable from the source. `-q:v 8`, and **no GDExtension is being proposed or adopted**. `-ac 2` because the source is **6-channel** WMA Pro and Godot's Theora path is not a surround one. That downmix is a decision, so it lives in the recorded command where a modder can see and change it rather than in prose. ### The exact command is in the manifest, per MISSION §6 `export/manifest.json` gains a `videos` array, each entry carrying the verbatim `ffmpeg` line that produced it. A modder who dislikes the quality re-runs one line instead of reverse-engineering what was done to their video — which is the whole reason this project converts the disc rather than reading it at runtime. ### A cache, and why that is not a hand-edit `export/` is regenerated wholesale, but re-encoding 232 s of video on every run costs ~4 minutes to produce a byte-identical file, and an exporter nobody re-runs is worse than a cache. So each movie gets a `.cmd` sidecar recording the command and the source size, and the encode is skipped only when both match exactly. Any change to either re-encodes. This is derived state validating derived state, not a hand-edit. ### The player renders into the design viewport, not beside it First attempt parented the `VideoStreamPlayer` to the Boot node. It played, and every captured frame was **black**: the capture reads the SubViewport, and the player was rendering to the window. Worth stating as more than a capture bug — everything this port draws composes in the export's own 1280×720 design space, and a movie outside that space is outside the coordinate system every screen is expressed in. ### Ⓐ skips, because Q9 measured it The only input the port handles so far. HANDOFF Q9: one Ⓐ press skips a movie, measured — the title was reached at 57 s against a 193 s baseline. Menu navigation is still P5. ## P4 gate `godot --path port -- --boot --film=…` runs `publisher_logo → developer_logos → ADV.ogv → title`, unattended. The filmstrip shows the SQUARE ENIX ident, then the reel's live-action-styled CG, then the title. The movie's place in the boot is **measured, not decoded** — Q9 decodes `ADVERTISE_MOVIE → ADV.wmv` from the movie manifest, but *where it sits in the boot order* is what the RE agent watched, and `authored/flow.json` says so. ### What I cannot verify from here **Audible playback.** This container has no audio device — Godot falls back to the dummy driver. What is verified is that the Vorbis stream exists in the transcode, is 2-channel, and decodes. Whether Godot emits it audibly is unconfirmed and is stated as unconfirmed rather than assumed from the stream's presence. It is a cheap check for anyone with a sound device and an impossible one here. --- ## RETRACTION — `sylpheed-cli` is not the oracle, 2026-08-29 **This corrects a framing that runs through everything above, so it is a retraction rather than an edit.** Every place this file called `sylpheed-cli screen render` *"the reference renderer"* — and it does so repeatedly, starting at P1 — overstated what it is. The correction comes from the human, via the RE agent, in their words: Reborn "was/is just a GUI explorer and extraction CLI for verifying the decoding of the various files. It may very well be wrong." **The oracle is the Xenia Canary capture and the game.** So `tools/verify-screen` is a **consistency check between two decoders that share their assumptions**, and a regression detector. It is not a correctness check, and agreement in it is not evidence of correctness. ### The embarrassing part is that this file already knew After the `ptframe1` case, P2's write-up says: *"Two renderers reading one field through one decoder agreeing is not evidence that the field is right."* Then P1's numbers kept being quoted as though 3/255 against `sylpheed-cli` meant the port was right. Having the principle written down did not stop me leaning on the agreement — which is worth recording, because that is the failure mode, not ignorance of the principle. **Three times** both renderers agreed and both were wrong, all three caught by a capture and catchable by nothing else: | | what both got wrong | how it surfaced | |---|---|---| | `pteff05` | the menu screens had **no background** | the RE agent decoded the RATC child name | | scale 0 | drawn at full size instead of collapsed | RE agent's control run | | `rest()` | `ptframe1`/`ptframe2` invisible; the menu bracket missing | `main-menu-oracle.png` | ### What changes * `tools/verify-screen` says all of this in its own header, calls the CLI the **comparison** renderer, and a `DIFFERS` row now means "we moved apart, find out which of us moved" rather than "the port is wrong". * The correctness question moves to the captures. The RE agent has committed nine of them with an index at `docs/re/captures/ORACLE-CAPTURES.md`, covering all five screens in scope — including a **main menu with `OPTIONS` focused**, whose difference from the unfocused menu isolates exactly what focus changes. * Three cautions travel with any capture comparison, and they are the RE agent's: the captures are **not gamma-neutral** (γ ≈ 1.49 menu, 1.34 title — there is a floor, do not chase it); **geometry is sound** (best alignment 0,0 at corr 0.9466, so a positional disagreement is real); and each is **one moment of a still-animating screen**, so compare settled poses or regions known to be at rest. ### What does not change The port keeps running `verify-screen` over all 16 screens every iteration. A consistency check is still worth having — it is total, it is cheap, and it is what catches a divergence the RE agent introduces on their side. It is simply not a grade, and this file will stop quoting it as one. ## P5 groundwork — the focus record, checked against a capture, 2026-08-29 P5 is the lowest unfinished milestone (P0–P4 are gated above). This iteration did not implement navigation; it did the measurement P5 needs first, because the one thing P5 is built on — how a focused button is drawn — had three claims attached to it and none of them had been checked from this side. ### The exporter already emits the focus record's second element HANDOFF ask 3 answers with a 🔴: *"what you are actually missing is the focus record's SECOND element"* — `ptbtneff01.t32`, a 42×46 glowing ring, declared before the bright label in `ptbtn0Nf.rat`. **That gap is in the renderer, not the exporter.** `export/screens/title/main_menu.json` already carries both, in declaration order, under `focus.elements`, for all five buttons — `ptbtneff01` then `ptbtn0Nf`, each with its own pivot, rest pose and keyframes. Nothing needs to change in `crates/sylpheed-export` for the ring. What is missing is that `screen_view.gd` draws only one sprite per focused button. Recording this so P5 does not re-open the exporter looking for it. The ring's size checks out exactly: `ptbtneff01.png` is **42×46**, as stated. ### The `(7,7)` focus offset survives a refutation attempt, uniquely Ask 3 states the focused sprite covers the base at 100.0 % of base-visible pixels "once aligned properly (the true offset is **(7,7)**, and at the centre alignment it reads a misleading 78–84 %)". P5 builds directly on this, so it was worth attacking. Re-ran the RE agent's own metric on the exported PNGs — over every pixel where the base sprite is visible, the fraction where the focus sprite's alpha ≥ the base's — scanning the whole offset space, not just the stated answer: | alignment | ptbtn01 | ptbtn02 | ptbtn03 | ptbtn04 | ptbtn05 | |---|---|---|---|---|---| | **(7,7)** | **100.00 %** | **100.00 %** | **100.00 %** | **100.00 %** | **100.00 %** | | geometric centre | 80.58 % | 79.20 % | 79.58 % | 79.45 % | 79.45 % | | pivot-to-pivot | 80.58 % | 86.59 % | 87.40 % | 79.45 % | 84.58 % | **The refutation fails, and more strongly than the original claim.** Over a 15×14 offset scan, `(7,7)` is a *unique isolated cell* at 100 % on every one of the five buttons — every neighbouring offset, including (6,6) and (7,6), falls below 90 %. The centre and pivot alignments reproduce the 78–84 % band the RE agent reported as misleading. A claim that survives a search of its whole parameter space is worth more than one checked at a single point, so this is recorded as strengthened, not merely unrefuted. ### `(7,7)` is not a constant to apply — it is what the declared positions already say An earlier version of this analysis had the port disagreeing with the capture by 6 px. **That was my arithmetic error and it is worth writing down**, because it is the mistake this format invites: I computed each element's top-left as `pos - pivot`, which gives base→focus deltas of (13,13) and a 29 % coverage — a confident wrong number. `pos` **is** the top-left. `screen_view.gd:121` is `Rect2(pos - pivot*(s - 1), natural*s)`: the pivot is the anchor scale grows about and it *cancels at 100 %*, which is exactly the "can be got wrong invisibly" the comment there warns about. Getting it wrong invisibly is what happened. With `pos` as the top-left, base − focus is `(542,162) - (535,155)` = **(7,7)** directly, on four of the five buttons. So P5 draws each focus element at its own declared `pos` and needs no offset constant at all. Nothing to author. ### The one real find: `ptbtn04` is 1 px off the grid on the disc The focus records sit on a clean 80 px pitch — 155, 235, 315, 395, 475. The **base** records do not: 162, 242, 322, **401**, 482, i.e. spacings 80, 80, **79**, **81**. So `ptbtn04`'s declared base→focus delta is **(7,6)**, while the art itself aligns at (7,7) — the coverage scan puts `ptbtn04` at 100 % on (7,7) and below 90 % on (7,6), the same as every other button. This is 1 px of authoring jitter on the disc, not a decode error, and it has one consequence worth stating: **do not derive the focus placement from the base by a constant.** Draw the focus record at its own declared `pos`. A port that "simplified" this to base + (7,7) would put `ptbtn04`'s focus art 1 px off, and would look right on the other four. ### Verified against a capture, not against our other renderer Diffing two oracle frames isolates what focus changes without any instrument in the path: `live-main-menu.png` vs `live-main-menu-options-focused.png` differ in one tight cluster of 6 338 px at **x 506..702, y 398..445**. `ptbtn04` is the `OPTIONS` button, and the union of its focus record under the `pos`-as-top-left reading — ring `ptbtneff01` at (500,396) 42×46 plus label `ptbtn04f` at (535,395) 172×56 — is **x 500..706, y 395..451**. Those agree on all four edges to within a few px of near-transparent sprite border. Under the `pos - pivot` reading the same record predicts x 433..604, y 367..422, which matches nothing in the capture — and *no* button matches that cluster. The capture, not our renderer, is what settles it. ### An instrument that failed its own control, and was therefore discarded To locate the buttons independently I wrote a masked normalised-cross-correlation template matcher and ran it as PROTOCOL requires — **through a control first**: match each *base* sprite against the *plain* capture, where the declared position is known and the answer must be a (0,0) delta. It returned deltas of (13,5), (6,−19), (12,21), (−16,22), (6,8) at NCC **0.096–0.206** — noise, with three of five pinned to the ±22 search boundary. The control fails, so the instrument is dead rather than tuneable, and **none of its output is used above.** The button art is dark, low-contrast and further crushed by the capture's γ ≈ 1.49 ramp, which is the likely cause; a matcher for this corpus would have to work on gradients rather than luminance. Filed so the next iteration does not rebuild the same broken tool. ### What P5 still needs, and has not got * **Initial focus is not stable across boots** (Q5: 2× `TUTORIAL`, 2× `NEW GAME`). That is a value to author, with a `why` naming Q5 — it is not written yet. * **The ring's own animation is unread.** `ptbtneff01`'s two keyframes go `rotation_deg` 0 → **360** at t=120 with no second timed keyframe, i.e. a full turn. Whether it spins continuously while focused, or turns once and holds, is the group-loop question again — answered "groups hold" for build-in animations, but a 360° hold and a 0° hold are the same pose, so *this* group cannot be told apart by its rest pose. Not guessed; raised below. --- ## P5 — navigation, 2026-08-29 The gate is *"a human clicks through it"*, and the artifact is a walk that proves the wiring rather than the intent: `up` (which wraps 01→05), five `down`, Ⓐ into `EXTRAS`, `down`, Ⓑ back — landing on the main menu with focus restored to `EXTRAS`. ```sh xvfb-run -a godot --path port -- --menu \ --script=up,down,down,down,down,down,accept,down,cancel --shots=/tmp/p5 ``` Ten PNGs, one per step, each taken after the screen it produced had settled. Contact sheet handed over as `share` id `1788002507-ef4468a0a33a`. ### The scripted walk goes through the input system, not around it `--script` posts `InputEventAction` through `Input.parse_input_event` and lets it arrive at `_unhandled_input` exactly as a d-pad's press would. Calling `MenuFlow.move()`/`accept()`/`cancel()` directly would have been shorter and would have proved nothing: the thing most likely to be broken is the wiring between a press and the cursor, and a direct call is precisely the part that skips it. The same reasoning says the settle wait must be real — a shot taken before the screen stops moving photographs a fade and calls it a menu. ### What is authored here, and what is derived Split deliberately, because P5 is where the two are easiest to blur: | | where | why | |---|---|---| | the ORDER of the items | **derived** — each screen file's `buttons`, filled by the exporter from the button-role elements sorted by resting Y | it is on the disc | | where an item goes | **authored** — `authored/flow.json` | HANDOFF Q4 *measured* the destinations; they are not in the file | | which item opens focused | **authored** | Q5 measured that it is **not stable boot to boot** | | what Ⓑ does | **authored** | Q5, measured — except on the main menu, see below | | ⬅➡ do nothing | **authored**, written as an explicit no-op | so that *"the game ignores it"* and *"we never wired it"* are different lines of code | Four of the five main-menu destinations are `goto: null` with a `blocked` note. That is **not** an unknown: `DIFFICULTY`, the save-slot list, the lesson list and the settings menu were all measured, and they live in archives this export does not carry. `blocked` and `none` are kept apart so a later reader does not "discover" a gap that was a milestone boundary. `EXTRAS` is the only main-menu destination inside `GP_TITLE`, and therefore the only Ⓐ-into-a-submenu this gate can actually walk. ### The one navigation rule with nothing behind it Ⓑ on the **main menu** → title. HANDOFF Q5 states it, and `flow.json` marks it *authored — likely but UNPROVEN*, because the title also self-returns after ~8–10 s idle and a single unrecorded observation cannot separate the two. The port implements it anyway — a menu with no way out is worse than a menu with a plausible one — and says in the file that it did. Asked of the Decoder this iteration; see `BLOCKED.md`. Independent corroboration that the main menu is different from its submenu: the main menu's footer advertises only `Ⓐ : OK`, while `EXTRAS`' footer advertises `Ⓑ : Back`. That is on the disc, in `ptmsg.png` vs `ptmsg2.png`, and it is visible in both the port's render and the captures. ### A press during a fade is dropped **Authored, and not measured.** Nobody has watched what the game does with a button pressed mid-transition. Dropping invents less than queueing does: it cannot manufacture a press the game might have discarded. `flow.json` says so under `navigation.input_during_transition`. --- ## `--headless` cannot draw, and the port hung instead of saying so, 2026-08-29 `docs/port/PORT-MISSION.md` and the loop prompt both name `godot-headless` as how this project runs unattended. It does not work, and the way it failed was the worst available shape. **Measured, not assumed.** Under `--headless` Godot's dummy renderer never emits `RenderingServer.frame_post_draw`. Every capture path in `boot.gd` awaits it — `--capture` since P1, `--film` since P3, `--shots` as of this milestone — so all three blocked forever. Isolated by the difference between two runs: ``` godot --headless --path port --quit # prints, exits 0 godot --headless --path port -- --screen=… --capture=… # no output at all, killed at 40 s ``` The second produces **zero bytes of output** before it is killed, because Godot's stdout is block-buffered and never flushes. So the observable behaviour of an unattended headless capture was: silence, forever. In a loop, a job that waits reads as a job still working — this is the failure mode that costs a whole iteration and leaves nothing behind to say what happened. Two changes, and deliberately not one: * `--capture`, `--film` and `--shots` **refuse at startup** under `--headless`, naming the flag and printing the `xvfb-run` line that does work. Refusing early rather than at the first frame means the run does not die halfway through a filmstrip with some frames written. * `--script` **no longer waits for a drawn frame when it is not going to photograph one.** Navigation is checkable where nothing draws, and that is worth keeping: `godot --headless --path port -- --menu --script=…` now walks the menus and exits 0 in about four seconds, which is a cheap regression check that needs no X server at all. The Xvfb path is unchanged and is what produced the P5 artifact. --- ## Refutation — the focus ring IS drawn rotated, and it is not at 0° in either capture Attempted against the Decoder's `7eeae30` (*"re(ui): the focus ring SPINS, the game draws it, and the leaf owns the f record"*), point 2: that in the OPTIONS-focused capture the ring's bright head sits in a different angular position from the sprite's own, caught mid-spin. **It survives**, and the evidence is stronger than what was claimed. Chosen for refutation because it is exactly what PROTOCOL says to aim at: a claim the port is about to build on, resting on an estimator (a brightest-region centroid) whose own control the Decoder reported as ±19.8°. ### The test, and why it needs no absolute registration `live-main-menu.png` has `ptbtn01` focused; `live-main-menu-options-focused.png` has `ptbtn04` focused. Both draw **the same sprite**, `ptbtneff01.png` — the export confirms the two focus records name the same file. So the two captures contain two instances of one 42×46 image, 240 px apart in design space, and the question *"is it drawn rotated"* becomes *"are these two crops the same image at a different angle"* — which needs no crop offset and no reference to our own renderer. Method: sample each ring into a 360-bin **angular luminance profile** over the annulus band (r = 9…15 px, bilinear, 0.5 px radial step) and circularly cross-correlate. A rotation about the centre shifts that vector and changes nothing else. ### The instrument was run through two controls before it was believed | control | result | |---|---| | rotate a capture's own ring by a known 0/30/90/150/210/270/330° and recover it | **0° error on all seven**, peak corr 1.000 | | the same estimator on a ring-free 60×64 patch of the *same* capture | peak corr **0.369** — it does not manufacture a match | ### The measurement On one shared centre for all three images, so a centroid difference cannot masquerade as a rotation: | pair | best shift | peak corr | corr at 0° | |---|---|---|---| | capture A vs capture B | **134°** | 0.968 | −0.064 | | sprite (unrotated) vs capture A | **76°** | 0.969 | −0.295 | | sprite (unrotated) vs capture B | **210°** | 0.948 | −0.181 | 210 − 76 = 134: the three measurements are internally consistent, which nothing in the method forced them to be. Sweeping the centre by ±2 px moves the A-vs-B answer over 117…161° while the peak correlation stays 0.9+ across the middle of that range, so the **magnitude is ~134° ± ~15°** and the precision claim stops there. Evidence sheet — sprite, capture A, capture B, each cropped at the declared `42×46+500+156` / `+500+396` — handed over as `share` id `1788002507-afe1ad843789`. The phase difference is obvious by eye; the numbers are here so it is not only obvious by eye. ### The two things this settles for the port 1. **The game draws `rotation_deg` on an element the English boot path shows.** This is a second, independent confirmation on a different screen and a different element from the `ptloop` sweeps, and it moves HANDOFF **ask 4** (*should the port draw rotation*) off "changes nothing at rest" — it changes the main menu's focus marker, in every frame. 2. **0° is not a pose the running game shows.** `screen_view.gd` currently draws the ring at its `rest` pose, which is `rotation_deg 0`, and both captures put it at 76° and 210°. So the port's focus marker is **known** to be wrong, not suspected — and the comment in `screen_view.gd` now says which two numbers it is wrong against. ### Registration, as a by-product The ring's annulus centroid lands at (32.94, 36.63) and (33.30, 38.90) in windows whose design-space prediction under a **zero crop offset** is (33.0, 37.0). Within ~0.4 px on the better-thresholded of the two. That corroborates `ORACLE-CAPTURES.md`'s *"1279×675, top-left aligned"* directly, on a feature nobody chose for the purpose. ⚠️ Do not read the earlier P5-groundwork note *"button text bands land at design y + 23"* as a crop offset — it is an offset **within** the button sprite, and the two were nearly confused here. ### What the port did NOT do about it It did not start spinning the ring. The period is a **guess with two unknowns** and both belong to the Decoder: * the keyframes are `t=120, rot 0` then an **untimed** `rot 360`. Under HANDOFF Q1's replicated reading (*"`+36` is the time the NEXT pose is reached"*) that is one revolution in 120 units = **2.0 s** — but this port's `pose_at` implements the *other* reading, and switching it is a change to every screen's animation timing, not a P5 change; * *"groups hold"* (settled 2026-08-28) predicts the ring stops at 360° = 0°. Both captures show it elsewhere. That is either a spin that loops, or two captures both taken inside the first two seconds of focus. **The port cannot tell those apart**, and a wrong answer here is a visible continuous rotation on whichever button the player is sitting on. Filed in `BLOCKED.md` and asked over the message channel. What settles it is two frames of one focused button a known time apart. --- ## P5 end to end — and the title does not say `PRESS Ⓐ`, 2026-08-29 The gate walk above starts on a screen. This is the whole thing, unattended, in one run — the sequence PORT-MISSION names as the objective: ```sh xvfb-run -a godot --path port -- --boot --play \ --script=accept,down,down,down,down,accept,cancel,cancel --shots=/tmp/e2e ``` ``` screen publisher_logo … settles at t=235 (3.917 s) -> developer_logos at 4.70 s -> video ADV at 8.60 s video ended at 151.91 s -> title at 151.91 s boot sequence complete after 156.30 s, holding on title menu on title script[1] accept (A) -> main_menu … script[6] accept (EXTRAS) -> extras script[7] cancel (B) -> main_menu focus restored to ptbtn05 script[8] cancel (B) -> title script complete after 166.76 s on title ``` Publisher wordmark → developer logos → `ADV` → title → Ⓐ → main menu → navigate → Ⓐ → `EXTRAS` → Ⓑ (focus restored) → Ⓑ → title. Contact sheet shared. Two smaller things this run found, both fixed here: * the boot step's `why` in `authored/flow.json` still said *"nothing takes the title's place until P5 gives it somewhere to go"*. P5 has. Rewritten to say what is actually true — `--boot` still **stops** on the title, and `--play` **hands the held title over**; the stop is not a bug and the handover is not another boot step. * an empty focus printed as a line that trailed off, which reads like a value went missing rather than like there is none. The title is a screen with no `buttons` that still takes Ⓐ, so it prints `(none -- this screen has no focusable item)`. Also confirmed on the way: entering a submenu **directly** (`--menu=extras`) and pressing Ⓑ enters the parent at its authored initial focus, not at a restored one — there is no history to restore, and `MenuFlow.cancel` only claims a restored focus when the stack agrees about where it is going. ### 🔴 The port's title does not tell the player to press Ⓐ Found by running the objective end to end, which is the only thing that would have found it: the boot's last step is `title` (build 4), and **build 4 has no `PRESS Ⓐ BUTTON` plate**. P5 has now made Ⓐ the only way off that screen. This is not a guess about the art. Both states are captured off the running game and they differ by exactly that plate: | | capture | |---|---| | title **without** the plate | `title-builds/live-title-build4-no-plate.png` | | title **with** the plate | `title-builds/live-title-press-a.png` | And the plate is already exported — `press_start`, `GP_TITLE` build 2 (HANDOFF Q2), sitting in `export/screens/title/` unused by anything. **This is P3's gate, not P5's, and P5 is what exposed it.** Recording rather than fixing, for two reasons: 1. Which state an idle post-boot title shows — build 4 alone, build 4 with the plate over it, or build 4 *then* the plate after a delay — is **behavioural**, and the port has no oracle for a sequence. The game demonstrably has both states; nothing here says which one follows the intro movie. That is the Decoder's. 2. Showing it would mean **drawing two builds at once**, which this port has never done — every mode loads exactly one screen. That is a real change to `ScreenView`, not a line in `flow.json`, and it should not be smuggled in under a navigation milestone on the strength of "it looks more right". Filed in `BLOCKED.md`. Not blocking: P5's gate is Ⓐ into a submenu and Ⓑ back, and both work. ## P6 — menu audio, 2026-08-29 The disc's menu sound reaches Godot as Ogg Vorbis: three cues and one music bed. Nothing in `port/` has heard of XMA, `sound.pak` or `Static.slb`, and nothing in it reassembles anything — `sylpheed_formats::media` does that and the exporter converts what it hands back. ### The cue offsets moved OUT of the exporter, into `authored/` The previous iteration left `crates/sylpheed-export/src/audio.rs` holding the three `Static.slb` offsets as a Rust `const CUES`. That is wrong under MISSION §3 and the fix is the first thing this iteration did. Those offsets are **measured**, not decoded. `Static.slb` has no `RIFF`, no seek chunk and no container: it is a packed run of whole 2048-byte XMA1 packets, and a wave is defined *only* by `(offset, packet_count)`. Both numbers came from the running game — Canary with `--xma_param_probe=true` prints a stream's packet count and first 32 bytes when it is played, and searching those bytes in the bank gives the offset (HANDOFF Q8). A measured value compiled into the exporter is **a measurement wearing the costume of a decoded field**. It reads as though the exporter derived it from the disc; nobody deletes it when the real answer lands, because nobody can see that there is anything to delete. So the table is `authored/audio.json` `se.*`, each row carrying its own `why`, and the exporter holds no cue table at all. `crate::video::MOVIES` stays a `const` in the exporter, and the contrast is the point: Q9 **decoded** that mapping off the movie manifest on the disc. Same shape, different provenance, different home. ### `name_match` is a field, and its absence means something Q8 names `SE_UI_CURSOR` for the move cue by **name match against the authors' own identifiers** — a plausible guess, not the measurement. For Ⓐ, Q8 is explicit that the wave was *not* separated between `SE_UI_DECIDE` and `SE_UI_SUB_WIN_OPN`, so no name is claimed at all. `name_match` therefore travels beside every cue in `authored/audio.json` and in `manifest.json`, and **an absent one means nobody claimed a name — never that the binding is unknown.** The binding is the measured part. Collapsing the two would turn "we did not separate two candidates" into "we do not know what this sound is", which is a different and much weaker statement than the one the RE agent actually made. ### The BGM is NOT a choice, and this port spent an iteration believing it was The first draft of `authored/audio.json` picked `BGM_001`, wrote a careful `why` explaining that the choice was arbitrary, and was **wrong**. `docs/port/BLOCKED.md` carried the row that caused it: *"not on the disc … the port is choosing a track, and that choice is authored."* The menu's music is **`BGM_103`**, and it is in HANDOFF at **`9ca1eb5`** — the exact commit that page says it was reconciled against. So this was not staleness. **The row was wrong when it was written.** What HANDOFF says is a negative *with a bound*, and the bound is the entire content of it: > the **tables** cannot say — `SOUNDS`, `FILES` and the bank headers name no > screen. `GamePart_Title`'s phase handler `sub_821C5580` carries `li r5, 1103` > into a sound call; cue 1103 is `BGM_103`; and `BGM_103.slb`'s two declared > waves (3 876 864 / 3 930 112 B) are byte-for-byte the two streams the XMA probe > saw decoding at the main menu. Static code, disc census and runtime all agree. > **"The port does not have to choose a track."** The failure is worth naming precisely, because "read HANDOFF more carefully" is not the lesson — `BLOCKED.md`'s own staleness check passed, twice, and would pass again. **A negative summarised without its reach reads as a bigger negative than it is.** "The tables cannot say" became "it is not on the disc", and one word of scope was the whole answer. A row in `BLOCKED.md` must quote the reach. It also cost a second thing worth recording: the port would have shipped a menu playing the wrong music with a confident `why` beside it saying the choice was deliberate. That is exactly the shape of error this project's vocabulary exists to prevent, produced *by* the machinery meant to prevent it. ### The bank name carries `.slb`, and that is how the mistake surfaced `BGM_001` is not in `sound.pak`. `BGM_001.slb` is — `media::read_sound_bank` looks up `name_hash(name)` against the TOC, and the TOC hashes the **file name**. `Static.slb` worked from the first run only because the RE finding happens to write it with its extension. So the wrong track never played: the export failed loudly with *"BGM_001: not present in sound.pak"*. That is luck, not design — had the draft picked a name that happened to resolve, nothing would have complained. The `why` in `authored/audio.json` now records both the correct name and why the short form fails. `export_bgm` now distinguishes the two cases it was conflating. A bank that is **not in this disc's `sound.pak`** is a missing asset: the manifest takes a warning and everything else still exports. Any other failure — a short read, a malformed bank — still stops the run, because a partly-read bank produces a file that plays. ### The two stems are summed. That part is not a choice Q10 also measured that a bank's sub-waves are **two stems of one performance, played together** — sample-synchronous, equal duration, on all 32 banks. Concatenating them is explicitly wrong. Emitting them as two files would be wrong for a second, independent reason: MODDING rule 1 is *one logical asset, one file*, and handing a modder two stems to line up by hand is precisely the reassembly the exporter exists to have already done. `amix=normalize=0` sums at unity rather than halving, because halving is a mix decision nobody made — and because a sum can clip, the peak is **measured and reported** rather than silently corrected. ### The loop seam is ugly on purpose No loop-point field has been identified. `loop: "restart"` replays from sample 0, so a listener hears the track's own fade-out and its trailing silence before the music comes back. Trimming to the fade would sound better and would be **worse**. It would invent a loop point, and an invented one is indistinguishable from a decoded one a month later — which is the failure mode this whole project is organised against. The seam stays audible until a loop point is measured or a capture of the real menu looping settles it. ### When a cue fires — two rules measured, one authored * **Move** fires on a press that *actually moves the cursor*. `MenuFlow.move()` already returned whether it did, which is why left/right stay silent by construction rather than by a rule written twice (Q5: ⬅➡ do nothing, and Q8: they play nothing). * **Ⓐ and Ⓑ** fire when the press *does something*, and not when nothing is bound. 🟡 **This half is authored and NOT measured** — nobody has watched the game take a dead press. Silence invents less: a sound the game does not make is a wrong fact you can hear, while a missing one is a gap. `blocked` counts as doing something, because those destinations *were* measured off the running game and are missing from this export, not from the game. * The bed starts when the menu becomes live and **carries across submenus**. `play_bed` is idempotent, because music that restarts every time you press Ⓑ is the kind of wrong that reads as "the audio works". ### `--audio=` records the Master bus, because neither container has a sound card `docs/port/AUDIO-VERIFICATION.md` §2. An `AudioEffectRecord` on the Master bus captures the mixed output from inside a headless run with no device at all, and that is the only thing that closes the loop the file opens: comparing an exported Ogg against the disc proves the **asset** is right and says nothing about whether the engine ever reached it. The run prints `AudioServer.get_driver_name()` beside the file it wrote, because "recorded under a dummy driver" is a weaker claim than "heard" and the write-up has to be able to say which one it is making. The WAV is saved in `_exit_tree` rather than beside each `quit()`. There are eight of those, and the one that would get missed is an error path — exactly the run whose audio somebody wants to look at. ### `check` now refuses silence and clipping `sylpheed-export check` gained an `audio` pass, and two of its rules are content checks rather than schema checks. That is deliberate. Silence is *the* audio failure that looks like success — a file of the right duration, the right channel count and the right size, full of zeroes — and it passes every structural check there is. Clipping is the other one, and the BGM can produce it because it is a sum at unity gain. The exporter measures both at export time; `check` refuses a tree whose peak is ≤ −90 dBFS or ≥ 0 dBFS. Neither is a judgement about whether the audio is the *right* audio. Nothing in that binary can know that, and `BLOCKED.md` says which parts are still authored guesses. ### A bug worth naming: the temp name ate the file extension `run_ffmpeg` wrote to `.back.ogg.partial` — the temp-name-then-rename discipline this project uses everywhere, and which `AUDIO-VERIFICATION.md` records as already having caused a confident wrong number once. ffmpeg picks its muxer **from the output filename**, so that is not a slightly uglier temp name; it is a hard failure before a byte is written: *"Unable to choose an output format for '.back.ogg.partial'"*. `video.rs` already had the right shape (`.ADV.partial.ogv`) and this function was written from scratch without looking at it. The extension goes last. ### Refutation — the three Q8 cue durations, checked end to end **The claim:** HANDOFF Q8 publishes three cue lengths — move **0.533 s** (8 192 B, 4 packets), back **0.344 s** (4 096 B, 2), confirm **1.016 s** (12 288 B, 6). P6 is built directly on top of these, which by PROTOCOL's own rule makes them the right thing to attack: refutation is cheapest where the other agent is most confident, and most valuable where the port is about to build. **Why they looked attackable.** The three do not share a rate. Seconds per packet is 0.133, 0.172 and 0.169 — the move cue is 22 % off the other two. If a packet were a fixed span of audio, at most one of these numbers could be right. **Why that is not a refutation.** An XMA1 packet is 2 048 bytes of *bitstream*, not a fixed span: it carries a variable number of 512-sample frames. At 48 kHz a frame is 10.667 ms, and the three durations come to **50.0, 32.3 and 95.3 frames** — near-integers, which is what a variable-frames-per-packet encoding looks like and is not what an arithmetic slip looks like. **The measurement.** The exporter reads `(offset, packet_count)` through `media::se_wave_riff`, decodes, and `ffprobe`s the finished Ogg: | cue | Q8 claims | exported file measures | |---|---|---| | move | 0.533 s | **0.533 s** | | back | 0.344 s | **0.344 s** | | confirm | 1.016 s | **1.016 s** | **Verdict: survives, exactly, at every published digit.** Recorded as a survival rather than a pass, because that is what PROTOCOL asks for — a claim that has survived an attempt is stronger than one nobody challenged, and the corpus should say which it is. ⚠️ **Reach, stated so nobody over-reads it.** This is not independent of Q8: the durations were derived from the same packet counts the exporter feeds in, so what it confirms is that reading those `(offset, packets)` through `sylpheed_formats::media` yields streams of exactly the claimed length — i.e. that the *transcription* into `authored/audio.json` and the assembly path are right. It does **not** confirm that these three waves are the sounds the game plays on those three events; that is Q8's own measurement, taken by playing them, and this port has no oracle to re-take it with. The attempt did find something, just not here: see the BGM section above, where the port's *own* `BLOCKED.md` row failed the same kind of check. ### The BGM bank has three sub-waves and HANDOFF says it has two `media::sound_bank_riffs("BGM_103.slb")` returns **three**. HANDOFF Q10's census says a music bank is *"exactly two waves of identical duration (32/32 banks on the disc)"* — and that census is itself a correction, of an earlier reading that called `BGM_001` three sub-waves and was refuted with "the 10 KB is the bank header". The third comes from `sylpheed-formats/src/slb.rs:380`, `to_xma_riffs`: when a bank has a leading headerless packet region ahead of its first `RIFF`, that region is emitted as a sub-wave. It exists because the voice path needs it — `VOICE_D_453` decoded to 0.14 s without it. `docs/re/REFUTED.md` already records the same region as what makes `BGM_106`–`BGM_109` "break the two-wave rule". **The port sums all three and says so in the manifest.** That is not the appealing answer — dropping sub-wave 0 would give a file matching the census, and it would have been one line. It is the correct one: *which bytes belong together* is the question `sylpheed_formats::media` owns, MISSION §2 names re-deriving it here as the single easiest thing in this project to get subtly wrong, and "the decoder returned something the corpus does not predict" is a finding to report, not a number to quietly adjust. Adjusting it would also have destroyed the evidence: a corrected export looks exactly like a correct one. So the export ships the decoders' answer, the manifest carries a warning naming the contradiction, `BLOCKED.md` has the row, and the Decoder has the pointer. Until it comes back, **the menu plays a sum of three things where the census predicts two**, and every one of those places says so. ### Clipping — and a comment of mine that argued for the thing that clipped The BGM came out at **+1.8 dBFS**. The comment above the code that produced it said `amix=normalize=0` sums at unity "because halving is a mix decision nobody made". That was wrong in both halves. Unity summing *is* a decision, and it is the one that clips. And 1/n is not a taste call: it is the smallest constant that makes an n-input sum of unity-scale signals provably clip-free, which is precisely the reasoning `video.rs` already carried for its 0.4142-normalised 5.1 downmix — in this same repository, written by this same port, and not looked at. It preserves the stems' relative balance exactly, which is the only thing about the sum that Q10 settles. It is written as an explicit `volume=` rather than left to `amix`'s `normalize=1` default, so the coefficient appears in the manifest's command line. A default is a decision nobody made and it can move under an ffmpeg upgrade — the same argument MISSION §6 makes about the downmix matrix. **The `confirm` cue is a different case and is not "fixed".** It lands at +0.18 dBFS, and it is a single wave off the disc with no arithmetic of ours in it: the disc masters it near full scale and a lossy decode of a near-full-scale signal overshoots by a fraction of a dB. Attenuating it would mean altering a game asset to make one of our own numbers smaller. So `check` bounds the two kinds differently — a `bgm` peak ≥ 0 dBFS is refused outright, because it is our sum; an `se` is refused only above **+1.0 dBFS**. 🟡 That +1.0 is a **judgement and not a measurement**, and it is the weakest number in P6. Nobody has measured the overshoot distribution across a corpus of cues. If a cue ever trips it, the right response is that measurement, not a looser bound. ## P6 gate — the audio is in the mix, and a null control says which part No container here has a sound card, so "P6 works" cannot be answered by listening. `docs/port/AUDIO-VERIFICATION.md` splits the question into three, and these are the two that need no device. ### 1. The exported files, measured off the finished assets ``` se back -> audio/se/back.ogg (0.344 s, peak -5.7 dBFS) se confirm -> audio/se/confirm.ogg (1.016 s, peak +0.2 dBFS) se move -> audio/se/move.ogg (0.533 s, peak -1.4 dBFS) bgm main_menu -> audio/bgm/main_menu.ogg (87.744 s, peak -7.7 dBFS, bank BGM_103.slb, 3 sub-waves) ``` `sylpheed-export check export` passes: 16 screens validate, and every audio entry carries a peak and a duration inside its bounds. The three cue durations match HANDOFF Q8 at every published digit — see the refutation record above. ### 2. The engine, recorded off the Master bus ``` godot --path port -- --menu --script=down,down,accept,cancel --audio=…/p6.wav → recorded 6.037 s of Master bus (driver Dummy) peak 0.0 dBFS, RMS −21.1 dBFS ``` **Non-silent is not the claim.** A WAV of the right duration full of the *bed* would look exactly like this, and the cues could be missing entirely. So the cue was isolated with a **null control**: the same scripted walk with ⬅ in place of ⬇. Left/right are measured no-ops (Q5) and fire nothing, so the two runs differ by exactly two move cues and nothing else — same screens, same transitions, the same Ⓐ and Ⓑ cues in both, the same bed. | | RMS | |---|---| | walk with two ⬇ presses | −21.9 dBFS | | walk with two ⬅ presses (null) | −22.1 dBFS | | **difference** | **−34.6 dBFS** | The difference is not spread over the run. It is **one burst beginning at t = 1.10 s and lasting 0.55 s** — two overlapping 0.533 s move cues — with 22 of 237 windows above −70 dBFS and silence everywhere else, including across the Ⓐ and Ⓑ presses, which cancel because both runs make them. That is the cue reaching the bus, separated from the music that was playing over it. ### The control that proved nothing, kept because it nearly passed The first attempt paired `--script=down,down` against `--script=left,left`. The difference was **bit-identical zero**, which reads as "the cues never reached the bus" and would have been reported as a bug. It was neither. Both runs recorded **1.115 s** while the first press lands at ~1.17 s: the control ended before the event it was controlling for. A null result from an instrument that was not running is not a null result — PROTOCOL's "run your own instrument through a control" applies to the control too. ### What this does NOT establish * **That it sounds right.** Everything above is correspondence and separation, not judgement. A ten-second human listen still answers something no measurement here does. * **That the bed is at a sane level against the cues.** 🔴 The Master bus peaks at **0.0 dBFS** in the four-step run — the `confirm` cue is +0.2 dBFS on its own, so any music under it puts the mix on the ceiling. Per-file levels are the disc's and are fine; the **runtime** mix has no headroom. The port has not set a bus balance, because nothing measures one and an invented balance is the same class of mistake as an invented loop point. Recorded here rather than fixed quietly. * **That "Dummy driver" means heard.** It does not, and the run prints the driver name so a write-up cannot forget to say so. ### One bug, in two dialects, both about a temp filename The temp-name-then-rename discipline this project uses everywhere broke twice in this milestone, in two different tools, for the same underlying reason: **tools dispatch on the extension, so a temp name must preserve it.** * `run_ffmpeg` wrote `.back.ogg.partial` → *"Unable to choose an output format"*, a hard failure before a byte was written. * `boot.gd` wrote `p6.wav.part` → `save_to_wav` **appends** `.wav` when the path does not end in it, producing `p6.wav.part.wav`; the rename then failed to find its source, its return value was not checked, and the run printed a success line naming a file that did not exist. The second is the more dangerous shape, and it is the one this project has already warned itself about: a confident line of output pointing at nothing. The rename's return is now checked and the failure is loud. ## P3, reopened — the boot title was missing the `PRESS Ⓐ` plate, 2026-08-29 P3 passed its gate with a boot that ended on build 4 alone. `BLOCKED.md` carried that as 🔴 from the start: both states were captured, so the art was never the question — the *sequence* was, and it is behavioural, so the port had no oracle for it. It is answered. `docs/re/title-plate-delay-measured.md` (`auto/no-disc-and-menu-captures` at `fb536df`, **not on `main`** at the time of writing) measures two independent boots: the title presents **without** the plate, and the plate arrives **2.13 s** later, the two runs agreeing to 6 ms. ### Two builds at once, as two `ScreenView`s `ScreenView` draws one screen. The obvious change was to teach it about a subordinate overlay screen; the change made was to put a **second `ScreenView` in the same `SubViewport`**, after the first. That is what "two builds at once" actually is. Each build has its own timeline, its own textures and its own hold — the plate's group runs independently of the title's, which is the entire content of the finding — and Node2D siblings already paint in tree order. The alternative would have put an `if overlay` in every method that walks elements, and would have expressed the same information less directly. The export's `paint_order` still means what it always meant: an ordering *within* a build. ### The delay is timed from where build 4 stops animating Not from where the title first appears. This is the finding rather than a detail: measured from first-draw the two oracle runs differ by **0.48 s**, because the build-in itself ran 1.64 s and 2.13 s and the emulator's frame pacing during an animation is not the game's clock. Measured from settle they differ by 6 ms. So `_boot_done` — the moment the sequencer already had for "this screen has reached its hold" — is the landmark, and the overlay is due `after_settle_seconds` later. A number taken from the wrong instant here looks exactly like a measurement. ### The overlay is attached to the BOOT STEP, not to the `title` screen What was measured is the boot title. Whether the plate is there when the title is reached *again* — by Ⓑ from the main menu, or after the attract movie — is not measured, and hanging the overlay on the screen would quietly claim that it is. So it lives on the boot step in `authored/flow.json`, and `_drop_overlay` takes it away with the screen it belongs to. `BLOCKED.md` carries the gap. ### Refutation — the RE agent's instruction contradicts the RE agent's measurement **The claim under test**, quoted from the finding's *"What the port should author"*: draw build 4, *"when build 4 has settled, wait **2.13 s**, composite build 2 over it"*. **It does not reproduce the measurement it came from**, and the gap is 3.97 s. Build 2 is not a static plate: it has a group, and this port plays groups. `press_start` has one element, `ptbtn00`, and its `fade_argb` reads ``` t=214 0x00ffffff pos (383, 560) invisible t=236 0x00ffffff pos (383, 550) still invisible, having slid 10 px up t=238 0xffffffff full alpha t=244 0xffffffff holds — 0x00ffffff the exit, untimed ``` At the measured 60 units/s that is **3.967 s** from the group's start to full alpha. Compose the instruction with the group and the plate is first *visible* at settle + 2.13 + 3.97 = **settle + 6.10 s**. What was measured — the glyph counter leaving its no-plate value of 154 — is the plate becoming visible at **settle + 2.13 s**. Neither obvious reconciliation works: | reading | plate visible at | measured | |---|---|---| | both groups start together | 3.97 s (build 4 settles at **4.350 s**) — i.e. 0.38 s *before* settle | settle + 2.13 s | | build 2's group starts at settle | settle + 3.97 s | settle + 2.13 s | | build 2's group starts at settle + 2.13 s (the instruction) | settle + 6.10 s | settle + 2.13 s | To land on the measurement, build 2's group has to start **2.51 s** after build 4's, which is not a landmark of anything. **Verdict: the instruction is refuted as written; the measurement is untouched.** The measurement is an observation of the running game and this port has no standing to doubt it. What is refuted is the step that turns it into an authoring rule, and that step is an interpretation. **So the port ships the instruction, not its own arithmetic**, prints the discrepancy on every boot, and files the row. This is the same call as the BGM sub-waves and for the same reason: reconciling two of the RE agent's numbers is a decoding question, and a port that quietly picks the one that looks right destroys the evidence — a corrected boot looks exactly like a correct one. The first thing to check is about the instrument rather than the game: is *"title settled"*, the glyph counter first reading 154, the same instant as the port's last-element settle (t=261, 4.350 s into the group)? If that landmark is earlier, the gap closes with nothing else moving. ### Refuting the port's own claim: things in this export DO pulse `BLOCKED.md` has carried this since P2, under the port's own raised question about whether groups loop: > no element's alpha reverses direction anywhere in this export, so nothing > pulses, which removes the obvious reason to expect a loop without disproving > one. **`ptbtn00` reverses.** `0x00` → `0xff` → `0x00`, in the table above, in the export, the whole time. The claim was never checked against `press_start`; it was checked against the screens P2 happened to be animating. The RE agent has now measured the running game pulsing this exact element at a mean 2.24 s. So the reason to expect a loop is back — and the port still does not draw one, because **no reading of this group produces 2.24 s**: the whole group is 268 units = 4.47 s, and from its first keyframe 54 units = 0.90 s. The plate is drawn arriving and then holding at its settle (t=238, alpha `0xff`), which is what every other screen does and what the static oracle capture `live-title-press-a.png` shows. Which instant a repeat restarts from is filed, not guessed. ### `--boot --capture=` — one frame instead of six hundred The boot had no artifact of its own except `--film`, a PNG every 0.25 s for the whole 156 s run, to answer one question: is the plate on top of the title at the end. `--capture` was a `--screen`-only flag taken in `_ready`, which for a boot run is 150 s too early. It is now deferred to the end of the sequence when `--boot` is given. ### P3 gate — the boot ends on two builds ``` godot --path port -- --boot --capture=…/p3-plate.png → boot sequence complete after 155.86 s, holding on title overlay press_start due at 157.99 s (+2.13 s after settle) overlay press_start raised at 158.00 s, 1 element(s), settles at t=238 ⚠ plate raised at settle+2.13 s but its own group reaches full alpha 3.97 s later, so it is first VISIBLE at settle+6.10 s -- the measurement is settle+2.13 s. boot ends on title + press_start at 161.99 s drew 16: ptbase2, ptloop01, …, ptcopyright overlay press_start at t = 261.00 units, drew 1: ptbtn00 ``` The PNG shows the title logo with **`PRESS Ⓐ BUTTON`** under it — build 4 and build 2 in one frame, which this port had never drawn. Two things the run made obvious and that are now fixed: * **The capture reported only the base build's elements.** The first composited capture printed `drew 16` and no mention of the plate, which reads as though the overlay had not drawn at all. The overlay gets its own line; folding its elements into the first list would have reported a screen that does not exist. * **`--screen= --overlay=`** raises the same composite immediately, by the same code path, with no delay. It exists because the only other way to see two builds was a 156 s boot of which 137 s is the intro movie — and under Xvfb's software Theora decode that is several minutes to answer "is the plate on top of the title". It applies **no** delay: the delay is a measurement and lives in `authored/flow.json`. The boot-mode narration is suppressed there, because a log line that describes a sequence it is not running is worse than no log line. ## P5 — the focus ring spins, 2026-08-29 The ring was drawn at 0° and the file said so: *"THIS IS KNOWN TO BE WRONG, and is drawn anyway because the right answer is a guess."* What was missing was the **period**, and it is now measured — `docs/re/focus-ring-spin-measured.md` (`auto/no-disc-and-menu-captures` at `4fa3099`): a continuous spin, from eight evenly spaced autocorrelation peaks over nine revolutions, **with no angle estimated anywhere** — both angle estimators failed their own controls and were not used. ### The period comes off the disc; the RE agent supplied only that it repeats `ptbtneff01` declares two keyframes that differ in **nothing but** `rotation_deg`, 0 → 360, the first timed at `t = 120` and the second untimed. The port turns once per **120 units**. Nothing is authored: the number is on the disc, and what the measurement adds is that the turn **repeats** rather than stopping at 360 = 0, which "groups hold" could not distinguish because those are the same pose. `ScreenView.spin_period_units` is the rule, and it is structural and narrow: exactly two keyframes, differing only in rotation, by a full 360, first timed and second untimed. **Disc-wide check over this export: 16 of 212 elements match, and all 16 are focus rings** — `ptbtneff01` on the five main-menu buttons and `ptbtneff02` on the three `EXTRAS` buttons, in both locales, every one declaring `t = 120`. Zero false positives. That check is the point rather than a formality. The measurement was taken on **one** button of **one** screen; a rule that also caught something else would be extrapolating it to elements nobody watched. ⚠️ It is a rule about **shape**, not a decoded field. Nothing on the disc says "this loops". The day a loop flag is decoded, this goes. ### Verified on the port's own render, with the RE agent's own control Captures at `--time=` 2.0 … 4.0 s on the settled main menu, `ptbtn01` focused: | | | |---|---| | t=2.0 vs t=4.0 (one full period apart), **whole frame** | **0.0000 / 255** — bit-identical | | t=2.5, 3.0, 3.5 against t=2.0, inside the ring's box | 3.60, 3.71, 3.58 / 255 | | sum of box luminance across **eight** phases | spread **0.027 %** of the mean | The last row is deliberately the RE agent's own observable: they separated rotation from a brightness pulse by showing total annulus brightness is conserved while per-bin brightness moves. The port's render conserves it to 0.027 % (theirs was 0.4 % over 16 s, with capture noise in it). A filmstrip of the four quarter-period phases shows the bright head at top, right, bottom, left. ### Two things it does not settle * **Direction.** The port turns 0° → +360°, the sign the disc declares. No signed angle was ever measured — the estimator that would have given one failed its control and was not used. * **Phase across a focus change.** The port drives the ring off the **screen** clock, so moving the cursor does not restart the turn. The alternative — the record's group restarting when the record is instantiated — is the stronger claim, and the oracle run held focus on one button throughout, so nothing separates them. Two frames straddling a focus change would. ## P3, corrected — the plate needs no authored delay at all, 2026-08-29 Last iteration the port refuted the RE agent's authoring instruction (*"when build 4 has settled, wait 2.13 s, composite build 2"*) with arithmetic off the disc, shipped the instruction anyway rather than pick between two of their numbers, and printed the discrepancy on every boot. **The refutation held, and the answer that came back is better than either option the port offered: author nothing.** `5b0a6e6`. ### The premise that failed was the port's, and it will bite again > 🔴 **`rest.t` is not when a screen settles.** It is the last *hold* keyframe > before the exit. Checked here rather than taken on trust. `title`'s `ptlogo1`: ``` t=26 (-116,-7) 150% a=0x00 the pre-roll t=42 (179,186) 101% a=0xe0 it has arrived t=251 (184,193) 100% a=0xff 5 px and 31 alpha steps later, 3.5 s on ``` It **stops moving at t=42** and then creeps for 209 units. `rest.t = 251` is the end of that creep, not the arrival. The title's visible build-in is over at **`t = 118`**, where `pteff01`, `pteff02` and `ptlogoall_eff` finish together. Every reconciliation the port computed last iteration was wrong by exactly that error: reading `rest.t` put build 4's arrival at 4.350 s instead of 1.967 s, and the "2.51 s, which is not a landmark of anything" that looked so damning is `(4.350 − 1.967) + 0.13` — the error itself, wearing a decimal point. ### One clock, and the interval is declared | | units | |---|---| | build 4's last build-in ramp | `t = 118` | | `ptbtn00` reaches `a = 255` | `t = 238` | | **difference** | **120 units = 2.000 s** | Measured: **2.138 s** and **2.132 s**. The 6.7 % is presentation rate — 120 units in 2.135 s is 56.2 units/s, the emulator running 28.1 fps against a nominal 30, and the corpus had independently measured the idle title at 28.5 fps *before* these runs. So `authored/flow.json` carries `"clock": "shared"` and **no delay**, `boot.gd` raises the overlay when the step's screen loads rather than at its settle, and `overlay.time_units = view.time_units` — assigned, not accumulated, because two independently advanced clocks drift by a frame here and there and the whole content of the finding is that 120 units is a fixed interval on one timeline. ⚠️ **The general hazard, stated by the RE agent and worth repeating where the port will read it: discount a wall-clock number off that oracle by ~6 %.** It is Canary's presentation rate baked into whatever it measures. A port at a true 30 Hz that authored 2.13 s would be visibly late. ### Refutation — two of the RE agent's numbers for the same 120 units disagree by 2 % Both findings measure the same declared quantity: **120 keyframe units of wall clock, during a static hold, in Xenia Canary.** | | | implied presentation | |---|---|---| | plate: settle → plate, two runs | 2.138, 2.132 s → mean **2.135 s** | 28.10 fps | | ring: one revolution, seven spacings | 2.18 2.16 2.18 2.16 2.16 2.20 2.20 → mean **2.177 s** | 27.56 fps | | **disagreement** | **0.042 s = 1.97 %** | | That is **seven times** the plate finding's own run-to-run agreement of 6 ms, and it lands on the argument that finding uses to justify trusting itself: *"the build-in is where frames are dropped; the static hold is not. A model in which the game's own timing varied would have to move both."* Two static-hold measurements are exactly what should agree under that model. A second, smaller arithmetic slip in the same place: the ring page reconciles 2.177 s against a band of "27.6–28.8 fps", saying the measurement *"sits at the top of that band"*. It does not sit in it. 60 rendered frames at 27.6 fps is 2.1739 s; the mean needs **27.56 fps** and the two slowest spacings (2.20 s) need **27.27 fps**. Four of the seven spacings are above the band's top. **Verdict: the containment claim is refuted; the spin, the period and the reconciliation are untouched.** Either the presentation rate genuinely differed between the two sessions — which the plate page's own corroboration argues against for static holds — or the ring's revolution is not exactly 120 units. The corpus should say which, because they are the same claim measured twice. 🟢 **Nothing in the port moves either way.** `spin_period_units` uses the declared 120 units at 60 units/s = **2.000 s of port time**, which is the true-30 Hz value both readings agree the disc means. This is a corpus consistency problem, not a port one — which is why it is filed rather than worked around. ### The corrected boot ended one build too early, and the capture showed it Moving the plate onto the shared clock also moved the boot's exit, and the first capture taken afterwards was **visibly darker** than the one before it. The cause is `pteff00`, the title's black fade quad: it ramps `0xff000000` → `0x00000000` over t=16…261, so at t=243 — where the run was quitting, `overlay.settle_time()` after the overlay was raised — the frame is still ~7 % black. The plate arrives at t=238; **build 4 is not finished until t=261**. The boot now ends at the later of the two, and says which in the log: ``` -> title at 145.79 s overlay press_start raised at 145.79 s, 1 element(s), settles at t=238 boot ends at 150.14 s, once both builds have arrived (t=261) ``` Worth recording because of how it presented: nothing failed, no warning was printed, and the only symptom was a frame slightly darker than the previous run's. A gate artifact that silently drifts is the failure mode this project keeps meeting — and it was caught only because there was a previous capture to compare against. ## P7 — the new-game intro, 2026-08-29 `S00A.wmv` has been in `export/video/` since P4 (MISSION §6 put both movies in scope at once). What P7 needed was for something to *play* it and for the run to end somewhere defined. ### The port skips two measured screens, and says so on screen The real chain is **`NEW GAME` → `DIFFICULTY` → `SELECT DATA` → Ⓐ on a save slot → ~4.5 s → `S00A`** (HANDOFF Q4 measured the screens, Q9 decoded the movie and then measured its onset off the running game at 0.96–1.000 with a strictly monotone playhead over 25 consecutive 0.5 s samples). `DIFFICULTY` and `SELECT DATA` are measured destinations that are **not `GP_TITLE` builds**, so no screen file exists to go to. The port therefore jumps from `NEW GAME` to the one thing in that chain it has. That is a gap, not a sequence, and the whole design here is about not letting it read as one: * `MenuFlow.accept` returns a **new kind**, `video`, rather than folding this into `blocked`. The caller has to announce the skip, and a distinct kind is what forces it to. * The runtime prints it every time: `(NEW GAME) -> the real chain is DIFFICULTY -> SELECT DATA, then the movie. Neither screen is in this export.` * `authored/flow.json` carries `skipped_chain` as **data**, so the names of what is missing live beside the decision rather than inside a GDScript string. A port that quietly jumped from `NEW GAME` to the intro would be showing a sequence the game does not have, with nothing on screen saying so. That is the exact failure this project keeps meeting from the other direction. ### What happens after the movie is authored, and had to be The game goes into **mission 1**. Gameplay is out of scope (PORT-MISSION §7), so "returns to a defined state" is a decision, and P7's gate says as much. The port returns to the **title**: the boot's own end state, so a run that finishes the intro lands somewhere a player can start again from. Nothing measured says the game does this, and `after_video.kind` is `"authored"`. ### The 4.5 s gap is left empty on purpose Q9 measures the movie starting ~4.5 s after Ⓐ on the save slot. What is on screen for those 4.5 s was never observed — the run that would have shown it hit the documented `sub_823070B0` cache crash after `SELECT DATA`. `GP_TITLE` **does** carry a loading screen (below), and 4.5 s is about the right shape for one. That is precisely why it is in `BLOCKED.md` and not in `flow.json`: a plausible filler that nobody watched is the kind of thing that is indistinguishable from a measurement a month later. ### A script timeout that would have failed every movie `--script`'s per-step timeout is 20 s, to stop an unattended run waiting forever on a screen that never settles. `S00A` is **93.9 s**, so the first scripted new-game run would have been killed at step 1 and reported as "never settled". Raising the constant would have been wrong in the other direction: a movie stuck at frame 0 would then hang the job, and a job that waits is worse than a job that fails, because it does not look like a failure. So the test is **liveness, not duration**: while `get_stream_position()` advances, the deadline moves with it; a stalled movie still trips the same 20 s. ### Found while looking: `GP_TITLE`'s four unnamed builds are LOADING screens `build_00`, `build_01`, `build_12`, `build_15` have never had names. Every element in all four is `pgloading_*` — `pgloading_processing.png`, `pgloading_circle1`, `pgloading_delta`, `pgloading_ring` — and `LOADING` is one of the three screen names the RE agent read out of the title part's state function. Two variants: 0/1 carry 7 elements, 12/15 carry 10. **They are not renamed here.** The archive's own pairing (adjacent for 2/3, `+3` for 4…9 and for 10/13, 11/14) suggests 0 is 1's twin and 12 is 15's, but which member of each pair is which **locale** is an inference, and a name is exactly the kind of thing that stops being questioned once written. Handed to the RE agent, who can answer it from a capture in one look. `BLOCKED.md` has the row. ⚠️ **And one of them is a second casualty of the `rest.t` problem.** `pgloading_eff00.prm` on entries 12/15 is a full-screen black quad whose group runs `0xff000000` at t=38 → `0xff000000` at t=48 → `0x00000000` untimed: black, held, *then* clear. Its `rest.t` is **38**, where it is fully opaque. A port that draws that screen at its declared rest draws **a black rectangle over the entire loading screen**. The title's case only dimmed a frame; this one hides everything. Filed with the `settle_time()` row it belongs to. ### Refutation — attempted on the fade-quad census; it survives, with a caveat **The claim** (HANDOFF, on transitions): *"in `GP_TITLE` exactly the six screen builds carry it while the six overlays do not"*, where "it" is the full-screen black `.prm` quad *whose keyframe group is the transition*. **The test**, over the whole export: count builds carrying a full-screen primitive with black in its keyframes. ``` 16 builds exported; 12 carry one. Of the 12 `is_build` bundles (excluding the 4 authored splashes): 8 carry, 4 do not. carry: title, title_jp, main_menu, main_menu_jp, extras, extras_jp, build_12, build_15 do not: press_start, press_start_jp, build_00, build_01 ``` 8 and 4, not 6 and 6. But the two extras are `build_12` / `build_15`, and their quad is a **different shape**: | | transition quad (`pteff00.prm`, title) | loading quad (`pgloading_eff00.prm`) | |---|---|---| | | `0xff000000` t=16 | `0xff000000` t=38 | | | `0x00000000` t=261 | `0xff000000` t=48 | | | `0xff000000` untimed | `0x00000000` untimed | | shape | black → clear → **black** | black → held → **clear** | The transition quad returns to black on exit; the loading quad does not. Read strictly — the quad *whose group is the transition* — the claim holds. **Verdict: survives.** The refinement is worth recording anyway, because the naive test over-counts by two and somebody will run the naive test. There are **two kinds** of full-screen black `.prm` in `GP_TITLE`, and only one of them is a transition. ## P7 gate ``` godot --path port -- --menu --script=accept --audio=…/p7.wav ``` ``` menu on main_menu, focus ptbtn01 script[1] accept (NEW GAME) -> the real chain is DIFFICULTY -> SELECT DATA, then the movie. Neither screen is in this export. -> video S00A at 1.18 s (/work/export/video/S00A.ogv) video ended at 94.93 s -> title (authored: authored) menu on title, focus (none -- this screen has no focusable item) script complete after 99.28 s on title recorded 98.453 s of Master bus (driver Dummy) ``` The movie ran **93.75 s** against a declared 93.9 s, the run ended on the title, and the Master bus recorded 98.453 s: `pcm_s16le`, 44.1 kHz stereo, RMS **−22.2 dBFS**. **What this does not show, stated because it would be easy to imply otherwise:** the recording contains the menu bed *and* the movie together, and this run did **not** separate them. So it establishes that the engine reached an output for 98 s of a run whose middle 94 s was a movie — not that `S00A`'s own audio track is in the mix. Separating them wants the P6 null-control method (a paired run that differs only in the movie), and that is not done here. 🔴 **Peak 0.0 dBFS again.** The same runtime-headroom problem P6 filed: per-file levels are the disc's and are fine, the Master bus has no headroom, and the port has set no bus balance because nothing measures one. ### One more file read while it was being written `ls` reported the recording as **3 702 828 B**; `ffprobe` on the finished file reports **17 367 084 B / 98.452608 s** — a factor of 4.7. `ffprobe` is right and the `ls` caught it mid-flight. `AUDIO-VERIFICATION.md` opens by naming this failure and the port has had the temp-name-then-rename discipline since P6, which is what makes it worth writing down rather than shrugging off: **the discipline protects a reader who opens the path, and it does not protect a reader who stats it at the wrong moment.** Size on disk is not a measurement of a file somebody else is still writing. Ask the decoder, not the directory entry. ## Modding — rule 4 was never implemented, 2026-08-29 `docs/port/MODDING.md` is explicit that modding is *"a design constraint on the exporter today — not a milestone to add later"*, and its rule 4 is base-and- overrides: a mod replaces a file by **shadowing its path**, so a modder edits nothing under the derived tree and re-exporting is always safe. **Nothing read `data/mods/` at all.** The directory has existed since the monorepo merge with a `.gitkeep` in it and no code path anywhere — exporter or runtime — that looked at it. Eight milestones shipped past that. ### One resolver, and every read goes through it `ExportTree.resolve(rel)` returns the mod tree's copy when one exists and the derived tree's otherwise. `read_json`, `texture`, `video` and `MenuAudio` all call it, so a mod can replace **a screen's JSON, a sprite, a cue, the music bed or a movie** — every asset kind the port reads. `MenuAudio` was reading `tree.root.path_join(...)` directly and had to be changed. Left alone it would have made audio the one asset kind a mod could not touch, for no reason a modder could have guessed — which is the failure mode rule 4 exists to prevent. There is deliberately no manifest of what a mod contains and no registration step: **the path is the registration**, which is the whole of the rule. ⚠️ **One tree, not a stack.** Several mods layering over each other needs a load order, and a load order needs a rule nobody has asked for. Said out loud in `data/mods/README.md` rather than answered. ### A modded run must not look like an unmodded one Every shadowed file is printed the first time it is read: ``` mod: sprites/title/main_menu/ptbtn01.png <- /work/data/mods/sprites/…/ptbtn01.png ``` MODDING says *"did I break it?"* is answered by disabling a mod. That is a fine last resort and a poor only resort, so the log names the replacement instead. **The first version of this got it wrong in an instructive way**: it printed a summary in `_ready`, before a single asset had been read, and so always said `(nothing shadowed yet)`. A report structurally incapable of reporting anything is worse than no report, because it looks like an answer. It now announces each shadow at the moment it happens. ### Gate A synthetic 203×43 magenta PNG — nothing disc-derived — dropped at `data/mods/sprites/title/main_menu/ptbtn01.png`: | | | |---|---| | pixels changed between the two renders | **8 501** of 921 600 (0.92 %) | | bounding box of the change | x 542…744, y 162…204 — **203×43**, the sprite's own size | | `sylpheed-export check export` afterwards | 16 screens still validate | The changed region is exactly the sprite and nothing else moved. ### `data/mods/` was not gitignored, and that is a hole in a hard rule *"Never commit game assets"* has been enforced on `export/` and `data/base/` since P0. But **a mod is usually an edited game asset**, and `data/mods/` was fully tracked — so the one directory a user is invited to put modified sprites in was the one directory git would happily take them from. `.gitignore` now excludes everything under it except the README. ### The naming split is not mine to resolve `MODDING.md` describes the tree as `data/base/`; `PORT-MISSION.md` §3, the exporter, `ExportTree` and `.gitignore` all say `export/`. Both are mission files, and PROTOCOL is clear that **only the human changes a mission**, so this is raised rather than picked. `.gitignore` has ignored both names on purpose since P0. It matters here for one concrete reason: MODDING's layout has `base/` and `mods/` as **siblings**, and today they are not — the tree is `export/` at the repo root while mods are `data/mods/`. The resolver takes `SYLPHEED_MODS` or defaults to `data/mods/`, which is what exists; if the tree is ever renamed to `data/base/` the sibling rule becomes natural and that default can go. ## Refutation — the paint-order key, and the reach of its tie-break **The claim** (HANDOFF Q3): paint order is *"a `u16` layer key at `+0x0A`, **decoded**"*, with the tie-break filed 🟡 as *"eight candidates refuted; costs one element's blend on one screen"*. **First pass: 2 of 16 screens did not match** a stable sort by layer key — both loading screens, `build_12` and `build_15`. **That was my test, not the claim.** `pgloading_eff00.prm` carries **no layer key at all** — `layer: null`, `layer_source: "none"`: it is a primitive with no sprite header, and the exporter's implied-name fallback produces nothing either. My sort put a keyless element first; the decoders put it **last**. Completing the rule as *"stable sort by layer key, elements with no key last"* gives **16 of 16**. And last is right: `pgloading_eff00` is the full-screen black quad, and HANDOFF's own sentence is that the fade quad paints last. **Verdict: survives, with the rule completed.** Worth recording because the published statement does not say where a keyless element goes, and there is at least one in the archive. 🟡 **But the tie-break's reach looks understated.** Census over this export: ``` elements sharing a layer key with another element: 105, across 12 of 16 screens ``` HANDOFF characterises the cost as *"one element's blend on one screen"*. 105 elements on 12 screens is a much larger surface than that. Most of those ties are probably invisible — two elements that share a key and never overlap cannot show a difference — but *probably* is doing the work in that sentence, and nothing has measured which. The port is unaffected either way: it draws `ui_layout::derived_paint_order` verbatim and derives no order of its own. ## Correction — the runtime "clipping" I flagged 🔴 twice was overstated P6 and P7 both filed 🔴 *"the runtime mix has no headroom"* on the strength of a peak reading of 0.0 dBFS off the Master bus. Measured properly: | | samples at full scale | of total | longest clamped run | |---|---|---|---| | P6 walk (5.944 s) | 43 | 0.0082 % | 10 samples — **0.23 ms** | | P7 new-game run (98.453 s) | 24 | 0.00028 % | 11 samples — **0.25 ms** | That is not a headroom defect. It is the disc's own `confirm` cue, mastered near full scale (+0.18 dBFS after a lossy decode), touching the ceiling for a quarter of a millisecond on a transient — and possibly only in the recording's 16-bit conversion, since Godot mixes in float and `AudioEffectRecord` saves `s16`. **Nothing is changed, and that is the point.** Attenuating the mix to buy headroom would be an unmeasured decision about level — the same class of thing this port refused for the BGM loop point and the stem balance. Refusing it there and taking it here would be inconsistent, and it would trade an inaudible 0.25 ms clamp for an audible change nobody measured. **A peak reading is not a clipping measurement.** One sample at 0 dBFS and two seconds of square wave give the same number, and I reported the first as though it were the second — twice, in red, in two milestones' write-ups. ## The P1 regression harness had been broken since the monorepo merge, 2026-08-29 `tools/port/verify-screen` is the P1 gate's regression detector: Godot's drawing of a screen against `sylpheed-cli screen render` of the same build. It had not been run since P1, across four milestones that changed the renderer — rotation, the focus record, the spinning ring, two builds composited at once. It could not have been run. **It resolves its reference binary to a path that `build-reference-cli` stopped being able to produce.** That script greps `crates/sylpheed-export/Cargo.toml` for ``` sylpheed-formats = { git = "…Syplheed-Reborn.git", rev = "…" } ``` and the monorepo merge (`65cefa7`) replaced that line with `{ path = "../sylpheed-formats" }`. The grep returns nothing, the script exits 1, and the binary left at `reference-cli/sylpheed-cli` is whatever predated the merge — here, **three hours older than the sources** and built from a revision nothing in the tree points at any more. Running the diff against it would have compared the port to a decoder from another era and called the result a regression check. `DECISIONS.md` already carries *"The reference renderer was stale for three diff runs"* from P2. This would have been the fourth, and the mechanism was different: not a forgotten rebuild, but a **build step that could no longer succeed and a consumer that only checked whether the file existed**. ### The fix is a deletion, not a repair The revision-keying solved a two-repo problem: `/reborn`'s `target/` was a live mount of the other agent's checkout and moved mid-run, so a pixel disagreement against it had a free variable in it. **The monorepo removed that problem by construction** — the exporter, the reference and the port now read one decoder, the working tree's. So `verify-screen` builds `sylpheed-cli` from the workspace. `SYLPHEED_CLI` still overrides for anyone who wants to pin one deliberately. ### The baseline, all 16 screens ``` build_00/01 max 3 over3 0 OK press_start(_jp) max 1 over3 0 OK title max 6 over3 790 DIFFERS main_menu(_jp) max 4 over3 0 DIFFERS extras(_jp) max 3 over3 0 OK publisher_logo(_r) max 1-2 over3 0 OK developer_logos(_r) max 2 over3 0 OK title_jp max 155 over3 20498 DIFFERS build_12/15 max 0 over3 0 OK ``` **No new drift.** Four milestones of renderer change and the only screen with a substantial disagreement is `title_jp` — which is the *same* one P1 recorded and left open: `ptlogo_eff2` is the single drawn element in the whole export at a scale that is not a whole multiple of 100 % (125 %), and the two renderers pick different source texels there. `ui_layout::blit` samples at the destination pixel's top-left corner, a GPU at its centre. **The port has still not changed to match**, because matching would mean reproducing a half-pixel bias on purpose to make a number smaller. Only an oracle capture settles it. `title`'s 790 pixels at ≤ 6/255 are the same class, one texel wide, on the logo's scaled edges. `main_menu` and `main_menu_jp` say DIFFERS on a max of 4 with **zero** pixels over the bar — a couple of pixels differing in a single channel. ### `max` alone could not tell 2 pixels from 25 000 The script reported only the largest difference anywhere in the frame, so `main_menu` (two pixels) and `title_jp` (2.8 % of the frame) produced the same verdict. It now also reports how many pixels are over the bar. **The bar itself is not raised.** Tuning a threshold until things match is the failure the script's own header warns about; adding a second number is information, not a loosened bound. ⚠️ The count is thresholded on **greyscale luma** while `max` is a per-channel maximum, so they are not two views of one measurement — a per-channel check counts 957 on `title` where the luma count says 790. ### What this harness cannot see, stated because the OK rows look reassuring It renders `--pose=rest`. That is deliberate — it holds both renderers to the same declared pose so the test is *port vs reference* and not *rest vs timeline* — but it means **none of this iteration's or the last four's visible work is under test**: not the spinning focus ring, not the plate composited over the title, not any timeline behaviour, not audio. Sixteen OK rows are a statement about the resting composite and nothing else. And it remains what its header says: a consistency check between two renderers that share their assumptions. Both have been wrong together three times — `pteff05`, scale-0, `rest()` — and each time only a capture caught it. ## Refutation — "builds 0/1 and 10/11 are the loading screen" is false in the index space this export uses **The claim**, from the RE agent 2026-08-29, answering the port's ask to name `GP_TITLE`'s unnamed bundles: *"builds 0/1 and 10/11 are the loading screen, decoded from their own `pgloading_*` element names."* **In this export, entries 10 and 11 are the splash screens**, and it is not close: | entry | elements | |---|---| | 10 | `palogo_eff0`, **`palogo_sqex`**, `palogo_sqex_eff` | | 11 | `palogo_eff0`, **`palogo_gamearts`**, `palogo_seta`, `palogo_anima` … | | 12 / 15 | `pgloading_eff00`, `pgloading_loop1`, `pgloading_str` … | Entry 10 is the **SQUARE ENIX** wordmark and 11 the developer logos — which the same agent identified, in the answer to the port's ask 1, as *"entries 10/13 are the SQUARE ENIX publisher wordmark, the first thing the boot shows"*. **Verdict: the finding is almost certainly right and the index space is wrong.** Over the twelve bundles `is_build` accepts — entries 0,1,2,3,4,5,6,7,8,9,12,15 — ordinals 10 and 11 are entries **12 and 15**, which are exactly the two dressed loading variants. So "0/1 and 10/11" is the `is_build` ordinal, and this export addresses by **pak entry index**. **Why this is worth a section rather than a shrug.** `authored/screen_names.json` is keyed by entry index, and the exporter's own comment says why: *"keyed by ENTRY, not by the enumeration ordinal — widening the enumeration to reach the splash renumbers the ordinals, and a name that moves when the rule changes is not a name."* Someone reading that message and writing keys `"10"` and `"11"` would **name the publisher wordmark and the developer logos as loading screens**, and the export would validate, and the boot would still run. Two enumerations of the same archive differ by exactly the four bundles the port had to add an allow-list to reach. That is the sharpest possible demonstration of why the exporter switched, and it has now nearly caused the error it switched to prevent. Reported; the names are still the RE agent's to give. ## The intro's missing dialogue was an export gap, not a transcode bug, 2026-08-29 A human play-test heard music under the boot intro and no voices. The obvious reading is that the 5.1→stereo fold dropped the centre channel, and it is wrong. **`ADV.wmv` carries music and effects only.** On this disc a cutscene's voice is a *separate asset*: one continuous XMA stream in `sound.pak`, bound to the movie by the manifest in `tables.pak` (`ADV` → `VOICETRACK = VOICE_ADV`). Nothing was dropped — `grep -rn voice crates/sylpheed-export/src/` returned nothing, because the exporter had never been asked for it. The transcode was correct the whole time, which is why every measurement on it passed. That is worth stating plainly because the failure *looked* exactly like a codec bug, and `docs/port/AUDIO-VERIFICATION.md` is full of ways to measure a transcode against its source. Every one of them would have come back clean. ### The binding is resolved, and must never be matched by name `audio::export_voice` takes exactly one route: `media::resolve_movie_voice_region(source, movie, VoiceLang::English)`, which walks movie → cue token (manifest) → sound id (registry) → a `[start, end)` byte region of the continuous stream. The cheap route — read `VOICE_.slb` — was not taken, and the reason is a measurement: | movie | resolved region | inside the bank named after it? | |---|---|---| | `ADV` | 433 930 240…437 044 592 | yes | | `S00A` | 452 798 464…455 499 120 | yes | | `RT01A` | 437 044 592…437 345 648 | **no — it is inside `VOICE_ADV.slb`** | ⚠️ **Name-matching is correct on exactly the two movies this port ships, and wrong on the radio cutscenes.** It would have exported clean, verified clean against both in-scope movies, and returned the wrong recording the moment anybody widened the export. This is the failure mode MISSION §2 names — one playable thing is not one archive entry — in its most convincing disguise: the spot-checks a person would actually run are the ones it passes. ### Three choices, and why none is a guess * **One file per movie**, per MODDING rule 1, and the region's chunks are **summed** — see the correction below, because the first version of this paragraph said the opposite and was wrong. * **Mono**, folded from the stream's **own declared channel count**, probed with `ffprobe` rather than assumed. This is not pedantry: `pan` silently ignores a channel the input does not have — measured this iteration on the 5.1 fold below, where `FLC`/`FRC`/`SL`/`SR` vanished with no warning at all — so a stereo matrix applied to a mono voice track is not an error, it is a −6 dB attenuation that nothing reports. A track that is already mono is passed through untouched. * **No sync offset, and no length clamp.** The voice plays from the video's first frame, so nothing is authored. The decoded length is recorded in the manifest *beside the movie's own length* rather than trimmed to it: the voice has no shared container to disagree with, so a length mismatch is the only symptom a resolution error would ever show, and clamping would delete it. That decision is the reason the error below was caught in the same hour it was made. ### Correction, within the hour — the chunks are stems, and I had concatenated them The first version of `export_voice` joined the region's chunks end to end and produced **359.201 s of voice for a 137.437 s movie**, and **255.460 s for a 93.779 s one**. Both ratios sit near 3, and both regions decode to 3 chunks. The manifest said so on the first run, because the length was recorded against the movie's instead of being clamped to it. A clamp — which is what `sylpheed-viewer` does, and what `media`'s own doc comment invites with *"trimmed by the caller's length clamp"* — would have produced a file of exactly the right duration containing the wrong audio, and every check in `docs/port/AUDIO-VERIFICATION.md` would have passed it. Decoding each chunk and timing it (`crates/sylpheed-export/examples/voice_chunks.rs`): | movie | movie length | chunk 0 | chunk 1 | chunk 2 | |---|---|---|---|---| | `ADV` | 137.437 s | 84.553 | **137.324** | **137.324** | | `S00A` | 93.779 s | 68.072 | **93.694** | **93.694** | | `RT01A` | — | 0.009 | **34.034** | — | Chunks 1 and 2 are **equal to six decimals and each span the whole movie**. That is HANDOFF Q10's decoded shape — *two stems of one performance, played together; do not concatenate* — showing up on a second asset kind. They are summed at `1/n`, exactly as `export_bgm` sums a music bank. ⚠️ **Chunk 0 is dropped and its status is open.** Its duration matches nothing: 84.6 s under a 137 s movie, 9 ms under `RT01A`. `docs/re/REFUTED.md` records `to_xma_riffs`'s hybrid branch emitting a **leading headerless packet region** ahead of the real `RIFF` waves, and `docs/port/BLOCKED.md` already carries that as an open row against `BGM_103`, where `media` returns three sub-waves against a census of two. **This is the same signature on an independent asset kind** — good corroboration, not proof, and the port is not entitled to close it. So the selection rule is written in terms of the measurement (*keep the longest duration and everything tying with it*), and every dropped chunk is named in the manifest with its length. This is the media-assembly trap MISSION §2 names, and it caught me: I wrote a doc comment asserting concatenation, gave the reason, and had it wrong. What saved it was refusing to clamp — the one decision in the first version that was made for the right reason. ### What a `None` means A movie whose region does not resolve is **genuinely unvoiced** — the honest answer for most `hokyu_*` resupply cutscenes — and gets a manifest warning, not a substitute. The corpus already paid for the alternative: resolving unbound movies through a shared demo line played the *wrong recording*. This is **decoded, not authored**, so it runs outside the `authored/audio.json` block in `main.rs`. Nothing new goes in `authored/`; there is nothing here we decided. ## Refutation, of my own exporter — MISSION §6 pins a downmix matrix, and the exporter ships a different one **The claim under test is the port's**, not another agent's, and it has been in `video.rs` since P4: that the 5.1 fold is normalised by `1/(1 + √½ + √½) = 0.4142` because *"the unnormalised form was measured too and **clips**: peak 0.0 dBFS."* That sentence rests on a peak reading. `docs/port/BLOCKED.md` records this port withdrawing a 🔴 runtime-clipping flag on precisely the grounds that **a peak reading is not a clipping measurement** — one sample at full scale and two seconds of square wave give the same number. So the justification for deviating from a matrix a human pinned was produced by an instrument this port has already declared unfit for the question. ### Measured properly, over the whole of both movies Decoded to 32-bit float so nothing is pre-clamped, then counted: samples at or over full scale, how many exceed it by more than 1 dB, and the longest consecutive run. | | peak | RMS | ≥ full scale | > +1 dB | longest run | |---|---|---|---|---|---| | `ADV`, MISSION §6 matrix | **+4.26 dBFS** | −14.55 | **4 406** / 13 187 900 | 1 874 | 16 samples (0.333 ms) | | `ADV`, exporter's matrix | −3.39 dBFS | −22.21 | 0 | 0 | — | | `S00A`, MISSION §6 matrix | **−1.34 dBFS** | −18.73 | **0** | 0 | — | | `S00A`, exporter's matrix | −8.99 dBFS | −26.39 | 0 | 0 | — | **The claim survives, and the reasoning behind it does not.** The pinned matrix genuinely overloads `ADV`: not one stray sample but 4 406 of them, 1 874 more than a full dB over, wanting 4.26 dB more headroom than the container has. That is a different animal from the 43 samples and 0.25 ms transient I withdrew a flag over, and the number that separates them is the **magnitude**, not the count. But the same table refutes the *scope* of the fix. **`S00A` never clips under the pinned matrix** — it peaks at −1.34 dBFS. The exporter attenuates it by 7.65 dB to solve a problem it does not have, because 0.4142 is derived from a theoretical worst case (every channel correlated at full scale at once) that neither movie comes near. ### Control, before believing any of it The pinned matrix names `FLC`, `FRC`, `SL` and `SR`, and a 5.1 source has none of them. ffmpeg neither errors nor warns — measured at `-loglevel warning`, the output was empty. So the literal string was decoded alongside its three-term 5.1 reduction (`FL = 1.0·FL + 0.707·FC + 0.707·BL`) and the two outputs compared: **bit-identical**, 52 751 600 bytes. The reduction is what runs, and it is the matrix §6 intends. *That silence is itself the trap the mono fold above guards against.* ### Not changed, and deliberately so MISSION §6 is a **human decision of 2026-08-29**, and the level of a mix is exactly the kind of thing §6 reserves — *"adjust it deliberately, as a commit"*. Three options, and choosing between them is not mine: 1. **Keep the pin.** `ADV` clamps on 4 406 samples. Rejected on the measurement. 2. **Keep the exporter's 0.4142.** Preserves the two movies' relative loudness exactly, costs 7.65 dB, and is safe by construction for any movie a modder drops in. 3. **One measured constant, `1/1.6339 = 0.612`.** The smallest single scalar under which no in-scope movie clamps: +3.39 dB over today, still one constant so relative loudness is untouched. Tuned to two files, but the exporter's own `check` refuses any export whose peak reaches 0 dBFS, so a third movie that needed more headroom would fail loudly rather than clamp quietly. Per-file normalisation is **not** on that list: it would put `ADV` 4.26 dB below `S00A` and change how two cutscenes sit against each other and against the menu bed, which is an aesthetic decision with nothing measured behind it. What changes today is only that the deviation is **visible**: `video.rs` now cites MISSION §6 by name and says it departs from it, and the export carries a manifest warning with these numbers. Before this, a reader of the manifest could not tell that a pinned human decision had been overridden at all — the command line was recorded faithfully, and recording the command you ran does not disclose that it is not the command you were given. ### The voice reaches the output, and a null control says so quantitatively `+ voice ADV` in the log proves only that `play_voice` found a stream and called `play()`. Whether the audio arrives at the Master bus is a different question, and `docs/port/AUDIO-VERIFICATION.md` §2 exists because it is. The control needed **no test-only code**: MODDING rule 4 already shadows any exported asset by path, so 140 s of silence dropped at `data/mods/audio/voice/ADV.ogg` mutes the dialogue and changes nothing else. Two `--boot --skip-at=25 --audio=…` runs, then `astats` over the same 14 s of movie: | | peak | RMS | |---|---|---| | `ADV.ogv`'s own audio (the bed) | −6.239 | −24.941 | | the exported voice alone | −7.614 | −27.965 | | **run with the voice muted** | **−6.251** | **−25.126** | | **run with the voice playing** | **−5.415** | **−22.913** | The muted run reproduces the bed to **0.01 dB peak / 0.19 dB RMS**, which is what makes the other row worth reading. And the mixed run is not merely *louder*: two incoherent sources at −24.941 and −27.965 dBFS predict a sum at **−23.184**, and the run measures **−22.913** — **0.27 dB** out. The voice is in the mix, at the level its own file says it should be. ⚠️ **Under the Dummy driver.** Per AUDIO-VERIFICATION, *"recorded under a dummy driver"* is a weaker claim than *"heard"*, and no measurement here says the recording is the **right** dialogue for this cutscene — only that the file the exporter resolved is the one reaching the output at the expected level. The two runs are also not sample-aligned (they differ by 1.7 s of wall clock), which is why the `RMS trough` column is omitted: it moved by 40 dB between runs on window placement alone, and peak and RMS are the two numbers that survive that. ### Ⓐ *does* skip the intro in this build, so the play-test's report is not this bug `--skip-at=25` on a `--boot` run: `video skipped at 25.02 s`, `video ended at 25.02 s`, title at 25.02 s. The press goes through `Input.parse_input_event` and arrives at `_unhandled_input` exactly as a pad's would, so **the wiring from press to skip is live**. What that does not cover is a real key event from a focused window, which is the difference between this run and the human's — and, separately, **whether the game permits skipping an attract movie at all** is HANDOFF Q9 and still 🟡. If the answer is no, this path is deleted rather than debugged. ## Refutation of my own two-stem reading — and it had already been adopted elsewhere Two hours after writing that a voice region's equal-length chunks are *"HANDOFF Q10's decoded two-stem shape"*, the Decoder asked me to decode the leading chunk — it has no XMA1 decoder in its container — and the decoder run refuted the claim I had made. **Equal duration was a shape match, and I carried Q10's *music* census across to voice on the strength of it.** The content does not support it: | | | |---|---| | `S00A` chunk 2 | **digital silence** — 4 497 300 samples, peak −inf | | `ADV` chunk 2 | **0.60 × chunk 1** (best-fit scalar), residual **26.8 dB** below the target | About 95 % of `ADV`'s second chunk is a −4.4 dB copy of the first. Two chunks of equal length, one silence and the other a scaled near-duplicate, are not two stems of one performance. ⚠️ **The claim had already travelled** — it is quoted in the Decoder's `voice-region-leading-chunk.md` — which is the failure PROTOCOL names: a wrong belief moving faster than its correction, through two documents that share a source. ### What it cost, and what changed Summing chunk 1 with silence at `1/n` put `S00A`'s dialogue **6.02 dB down for nothing**: the exported file peaked at −16.2 dBFS against a source chunk peaking at −4.2. `export_voice` now drops a **digitally silent** chunk before the sum. That is arithmetic, not a content judgement — a silent input contributes nothing to a mix and counting it in the normalisation is simply my error. **What `ADV`'s near-duplicate chunk 2 is remains open and it is still summed.** Whether the game plays both is a decoding question; 26.8 dB of residual is not nothing, and dropping a chunk because it correlates with another would be answering it. ### The leading chunk, decoded — structure, and not one word about content The Decoder's ask was *"cutscene dialogue or mission dialogue"*. `ADV` region + 1392, 394 packets: **84.553 s, stereo, 48 kHz, peak −2.48 dBFS, RMS −24.80**, with **6 silent gaps over 0.4 s below −50 dB totalling 45.3 s** — 54 % silence, the same duty cycle as the two full-length chunks (54 %, 55 %). So it is **speech-structured audio**: not a header, not padding, not noise. 🔴 **Which is as far as a measurement goes.** *Cutscene or mission* is an identification and this agent has no ears and no oracle. Envelope cross-correlation against the full-length chunks peaks at 0.768 **at the last lag in the search range**, which is where a statistic lands when it has found nothing, and it is not evidence. The Decoder's 🟡 stands, and its own leading hypothesis — an in-mission `VOICE_D_*` line — is untouched by any of this. The byte-span test it already built settles it the moment those regions are enumerated; nobody has to listen. ### Taken from the same message: `bank_header_len`, not `riffs.len()` The Decoder's census warns that eight bank-header regions also yield three chunks, so the chunk count cannot say which structure you are in. **This exporter never used the count** — it selects on decoded duration, which is why it already handles both cases: `RT01A`'s 10 300 B leading chunk decodes to 9 ms and falls out on its own. But a duration tie is an *observation* and `bank_header_len` is *decoded*, so the rule switches the day `c1f3608` reaches `main`. `sylpheed-formats` is a path dependency and merging another agent's topic branch is not the port's to do. ## The mono fold I warned about, in the comment directly above the code that did it `export_voice`'s first version folded to mono by averaging every **declared** channel, and the doc comment above it said, in as many words, that *"`pan` silently ignores a channel the input does not have — so a stereo matrix applied to a mono voice track is not an error, it is a −6 dB attenuation that nothing reports."* It then did exactly that. Per-channel `astats` on both voice streams: | | channel 1 | channel 2 | |---|---|---| | `ADV` chunk 1 | peak +0.000 dBFS | **peak −inf** | | `S00A` chunk 1 | peak −4.207 dBFS | **peak −inf** | The voice is a **mono recording carried in a nominally stereo stream**, and averaging it with silence cost **5.94 dB** — which is most of why `S00A`'s exported dialogue sat at −16.2 dBFS against a source chunk peaking at −4.2 (the other 6.02 dB was summing a silent *chunk*, corrected in the same iteration). **Checking the declared channel count is not checking the content, and only the content is the fold.** `live_channels` now measures which channels carry signal and averages only those. `sylpheed-viewer`'s `pan=mono|c0=c0` reaches the right answer here for a reason it does not state; this reaches it for a stated one, and would still be right if a stream ever did carry two live channels. Worth recording as a pattern rather than a bug: **three defects this iteration were all the same shape** — a silent chunk in a sum, a silent channel in a fold, and a `pan` matrix naming channels that do not exist. Each is an input that contributes nothing being counted in a divisor, and none of them is visible in anything but a level. ## The leading chunk is the TAIL of the full one — measured, and it is why the region over-covers The Decoder settled by byte-span analysis that a voice region's leading chunk is **the movie's own dialogue, 17 of 17** — killing its own standing hypothesis that it was an in-mission `VOICE_D_*` line — and asked whether dropping it is therefore a truncation. It has no XMA1 decoder; this container does. Envelope cross-correlation, sliding with overhang allowed at both ends and normalised over the overlap only. ⚠️ **This corrects an earlier number of mine**: a first pass scored 0.768 and I called it nothing, correctly — that search only tried lags where the shorter chunk fitted *wholly inside* the longer one, and it peaked on the boundary of its own range. | | best *r* | at lag | overlap | |---|---|---|---| | `ADV` chunk 0 → chunk 1 | **0.998** | **+52.8 s** | 84.5 s | | `S00A` chunk 0 → chunk 1 | **0.932** | **+25.6 s** | 68.0 s | | control — `ADV` chunk 0 against itself | 1.000 | 0.0 s | — | | control — `ADV` chunk 0 against `S00A` chunk 1 | **0.289** | — | 28.2 s | **Both lags put chunk 0 flush against the end of chunk 1**: 52.8 + 84.55 = 137.35 s against chunk 1's 137.324, and 25.6 + 68.07 = 93.67 against 93.694. Confirmed in the sample domain — lag refined to ±1 sample on the loudest second, then a scalar best-fit over the whole overlap: `ADV` +52.8000 s, gain 0.833, residual **16.70 dB** below the target; `S00A` +25.6320 s, gain 0.365, residual **23.15 dB**. 98–99.5 % of the energy is a scaled copy: the same material at a different gain, not bit-identical, which is what a lossy decode at two gains should look like. **So dropping chunk 0 removes a duplicate, and is not a truncation** — the exporter's existing behaviour is right for a better reason than the one it gave. 🟡 **The manifest note has NOT been rewritten to say so.** The structural claim — that the region over-covers because it re-presents its own tail, and that this accounts for the whole 2.6× — is the Decoder's to write down; this page reports the measurement and says which is which. The note stays hedged until its page carries the conclusion, and the hedge is true either way. ⚠️ **The 504 464 B constant was deliberately not converted.** The Decoder found the region anchor sitting that far after the true predecessor trailer on all 17 and pointedly declined to call it missing dialogue. Converting it needs a byte↔time mapping, and the numbers above are the reason there isn't one: chunk 1 is 1 118 268 B and chunk 2 is 1 171 516 B for **the same 137.324 s**, so bytes per second is not constant even inside a single region. Any figure in seconds off that constant would be invented. ## Third reading of a voice region, and this one is decoded: three presentations of one take `export_voice` has now read the same bytes three ways in one session, and each reading was ended by a measurement rather than by an argument: 1. **Concatenate the chunks** — 359 s of dialogue for a 137 s movie. 2. **Sum them as HANDOFF Q10's two stems** — refuted here: `S00A`'s second full-length chunk is digital silence, `ADV`'s is 0.60 × the first with 26.8 dB of residual. 3. **Keep one stream.** ✅ This one is decoded, and not by me. The Decoder settled the shape disc-wide without a decoder, by counting stream starts inside every inter-descriptor span: **258 spans hold one stream, 28 hold three, and nothing holds two or any other number.** The 95 movie-voice regions decompose 70 + 8 + 17, and the 8 are independently the same 8 its first census flagged. So a region carries **three presentations of one take** — which is exactly `359 = 84.55 + 137.32 + 137.32`, the first clipped by its crate's own 1.5 MB predecessor guard. It also cross-checked my correlation by a route needing no decoder: if the leading chunk is the tail of a full stream, the whole leading stream should be one complete take, and `ADV`'s 504 464 + 808 304 = 1 312 768 B at chunk 0's byte rate is **137.323 s against my measured 137.324**. Two instruments, no shared assumption. **So summing was wrong for a third reason:** a take plus a 0.60 × copy of itself is ~4 dB louder and coloured, not a mix of parts. The exporter keeps one stream and performs no arithmetic on it. 🟡 **Which stream is a recommendation, not a decoded field.** The selector is the **highest byte rate** among the equal-duration survivors, on the Decoder's advice. Nothing on the disc says which presentation the game plays, and on `ADV` this picks the **quieter** of the two — −8.3 dBFS against 0.0. That is in the manifest in those words so the choice is visible and reversible; it is the one part of this that a capture could still overturn. `check` moves `voice` off the strict peak bound as a consequence. It sat with `bgm` because it was a sum this exporter produced; it is now a single wave off the disc, mastered near full scale — `ADV`'s louder presentation measures **+0.0003 dBFS at source** — and refusing that would be refusing the disc's own mastering. ### The 504 464 B constant: I refused the conversion, and refusing was right The Decoder asked whether I would spend a decode converting its anchor offset to seconds, and I declined because bytes per second is not constant even inside one region. It has since found the stronger reason and withdrawn the ask: **the constant is structural, not proportional** — identical on all 17 regions despite their differing durations. A proportional prediction lands within 8 bytes on `ADV`, which is a coincidence, and is **4 305 B out on `S00A`**. A seconds figure off that constant would have been invented, and it would have looked corroborated on the first movie anybody checked. ❔ **Why the disc stores three presentations at all is unanswered**, by either of us.