re: BLOCKED -- the 2D / READY_ROOM TOC names, three routes closed with controls

1. A different hash family.  The corpus knows three (idxd-tag-hash.md):
name_hash, tag_hash, ixud_hash.  Scoring all 5977 harvested names x 6
prefixes: GP_TITLE 8/16 and GP_PAUSE_MENU 6/11 under name_hash (the
positive controls), and tag_hash and ixud_hash explain NOTHING anywhere
-- including the paks name_hash does explain.  So they are not the TOC
function, and the unnameable pair is not keyed by a different one.
GP_MAIN_GAME_E2D stays at 0/711 under all three.

2. The executable.  sylpheed.db's strings table holds 7140 rows, of
which exactly two look like asset paths -- Data\gmicon002_2.t32 and
Data\gmicon006_2.t32, in a Data\ directory nothing else on the disc
uses -- and neither resolves in any archive.  The binary is not the name
source; it holds two strays and no table.

3. Name transformations -- 13 of them on the 419 config paths, all 0.

The container runs out here.  Those TOC keys hash names that exist on
neither the disc nor the executable in readable form.  The only lever
left is a dictionary attack using name_hash's shape (top byte = the
character-sum checksum), and that needs a plausible name corpus this
disc does not contain.  Noted as blocked rather than improvised around.

The port does not need these names: sprites and bundles are readable by
content (T8aD, RATC), and the config records already say which asset
each HUD element uses.  Only the archive-key to name mapping is missing.

Artefact +22 lines / 0 deletions; the other eight regenerate
byte-identical.

docs/re/structures/archive-naming.md

@@ -55,6 +55,45 @@ uppercased, `.rat` substituted, `2d\`/`eng\`/`hud\`/`GP_MAIN_GAME_2D\` prefixed,
 and first-directory stripped. **Every one scored 0, both against the E2D pak's
 711 entries and against all 16 630 entries on the disc.**
 
+## 🔴 BLOCKED — three routes to those names, all closed
+
+Followed up the next iteration. Every avenue the container can reach is now
+tried, each with a positive control in the same run:
+
+**1. A different hash family.** The corpus knows three
+([idxd-tag-hash](idxd-tag-hash.md)): `name_hash` (pak TOC), `tag_hash` (IDXD
+keys) and `ixud_hash`. Scoring all 5 977 harvested names × 6 prefixes:
+
+| archive | `name_hash` | `tag_hash` | `ixud_hash` |
+|---|---:|---:|---:|
+| `GP_TITLE` (control) | **8 / 16** | 0 | 0 |
+| `GP_PAUSE_MENU` (control) | **6 / 11** | 0 | 0 |
+| `GP_MAIN_GAME_E2D` | **0 / 711** | 0 | 0 |
+| `GP_READY_ROOM` | 6 / 1 106 | 0 | 0 |
+
+`tag_hash` and `ixud_hash` explain **nothing anywhere**, including the paks
+`name_hash` does explain — so they are not the TOC function, and the two
+unnameable archives are not simply keyed by a different one.
+
+**2. The executable.** `sylpheed.db`'s `strings` table holds **7 140** rows, of
+which exactly **two** look like asset paths — `Data\gmicon002_2.t32` and
+`Data\gmicon006_2.t32`, in a `Data\` directory nothing else on the disc uses.
+**Neither resolves in any archive.** So the binary is not the name source
+either; it holds two strays and no table.
+
+**3. Name transformations** of the config paths — 13 of them, all 0 (above).
+
+🔴 **This is where the container runs out.** The 2D and `GP_READY_ROOM` TOC keys
+hash names that are on neither the disc nor the executable in readable form. The
+remaining lever is a *dictionary attack* using `name_hash`'s shape — the top byte
+is the character-sum checksum, so candidates are cheap to reject — but that needs
+a plausible name corpus, and this disc does not contain one. **Noted as blocked
+rather than improvised around.**
+
+⚠️ The port does not need these names: the sprites and bundles are readable by
+*content* (T8aD, RATC), and the config records already say which asset each HUD
+element uses. Only the archive-key ↔ name mapping is missing.
+
 ## 🟡 Not settled
 
 * What names the 2D and `GP_READY_ROOM` TOCs actually hash. The one lever left is