Syplheed-Reborn/docs/re/weapon-datasheet-runtime.md

Weapon DATA SHEET — runtime capture (Route B)

Status: 🟡 first dynamic capture, 2026-07-28. The Arsenal's Gallery Mode panel is a direct runtime readout of the IDXD weapon record, which makes it an oracle for the fields the disc leaves defaulted. Two field mappings are ✅ CONFIRMED; two defaulted values are recovered at 🟡 PROBABLE. Captured from the retail game under Xenia Canary (software Vulkan, headless) — see the container recipe.

Problem

sylpheed-formats::game_data reads the combat tables out of dat/GP_MAIN_GAME_E.pak, but a field left at its default value carries no value on disc — the key is present in the IDXD string pool with no value token in front of it. Those defaults live in title code, so a static read can only ever say "not set", never what the game uses. That is a real hole for the reimplementation: e.g. Weapon_DSaber_P_wep_01_Beam — the Delta Saber's starting beam gun — has no TriggerShotCount and no Power on disc.

Ruled out first: the defaults are not hiding in another pak. hidden/DefTables.pak contains no WEAPON-schema (0x6ab4825a) objects at all, and the other GP_MAIN_GAME_* paks are localized duplicates of the English one.

The two scratch analyses that produced the shopping list live next to the crate: crates/sylpheed-formats/examples/defaulted_fields.rs (per-schema: which keys are declared but defaulted, and by whom) and examples/default_owners.rs (per-key: every owner, valued or <DEFAULT>).

Caveat on those tools: they classify a token as a value only if it is numeric or non-identifier-shaped. Boolean/enum-valued fields therefore read as <DEFAULT> spuriously (Yes, Homing, Single, Burst are identifier-shaped). Every finding below concerns numeric fields, where the classification is sound.

Finding — the DATA SHEET reads the record

In ARSENAL → (weapon type) → Y (Gallery Mode) each entry shows a DATA SHEET, and it is shown for weapons that have not been developed yet — only fully hidden (dashed) entries are withheld. The same panel appears in HANGAR → (hard point), with an extra Weapon Type row.

DATA SHEET row	IDXD field	Confidence	Evidence
Ammo Capacity	LoadingCount	✅ CONFIRMED	9/9 exact matches across 4 weapon types — 3000, 6000, 4000, 600, 300, 600, 45, 18, 75
Max. Lock Ons	TriggerShotCount	✅ CONFIRMED	FALCON 9AM = 12 vs wep_02's 12; BUZZARD 10AM = 22 vs wep_04's 22 (two distinctive values, two independent records)
Hard Point	mount slot	✅ CONFIRMED	matches the HANGAR slot the weapon is mountable/equipped on (STILETTO BG I → NOSE, FALCON 9AM → MAIN WEAPON1)
Range Class	bucket of MaximumRange	🟡 PROBABLE	monotone in the on-disc metres, see the bracket table below
Damage Class	bucket of Power	🟡 PROBABLE	monotone in the on-disc power, see below
Weight Class	bucket of the hangar-table Weight	❔ HYPOTHESIS	only one clean pair so far (wep_33, Weight 0.3 → "Light")
Speed Class	❔	❔	present only on missiles (MPM = A, ASM = B); no on-disc pairing established
Sight Homing, Lock on Overlap	❔ (Available / –)	❔	the plausible on-disc partners (Homing, OverlapLockon) are identifier-valued and not yet decoded; NEEDS-HUMAN

Finding — recovered defaults

Weapon	UI name	Field	On disc	Runtime	Conf.
Weapon_DSaber_P_wep_05_ASMissile	TERRIER SMH	TriggerShotCount	(defaulted)	4	🟡
Weapon_DSaber_P_wep_60_ASMissile	HOUND SMH	TriggerShotCount	(defaulted)	4	🟡

Both defaulted weapons read 4, which is consistent with a single title-code default of TriggerShotCount = 4 rather than two per-weapon constants — but two samples cannot tell those apart. ❔ HYPOTHESIS: the title-code default for TriggerShotCount is 4. It would be confirmed by a third weapon that defaults the field and also reads 4 (candidates that were still locked in this save: wep_27, wep_30, and the seven Beams), or refuted by one that reads anything else.

Power and MaximumRange defaults are not exactly recoverable from this panel — it shows only the letter bucket. They are bracketed instead (below).

Captured rows

All values are from one session on save slot 01 (Stage 02, "At Standby", 5 % clear, 4101 P); ✓ marks a value that matches the on-disc record exactly.

UI name	Record	Rng	Dmg	Spd	Weight	Ammo	Lock	Homing	Overlap	Hard point
LIGHT MACHINE GUN MG I	wep_33_Gun	D	E	–	Light	3000 ✓	–	–	–	NOSE WEAPON (Nose)
BROAD SWORD SG I	see below	E	D	–	Light	200	–	–	–	NOSE WEAPON (Nose)
STILETTO BG I	wep_01_Beam	E	E	–	Light	6000 ✓	–	–	–	NOSE WEAPON (Nose)
DAGGER BG2	wep_37_Beam	D	E	–	Light	4000 ✓	–	–	–	NOSE WEAPON (Nose)
PILUM BP	wep_24_Beam	B	D	–	Light	600 ✓	–	–	–	MAIN WEAPON1 (Fore)
FALCON 9AM	wep_02_Missile	D	D	A	Heavy	300 ✓	12 ✓	Available	–	MAIN WEAPON1 (Fore)
BUZZARD 10AM	wep_04_Missile	C	D	A	Heavy	600 ✓	22 ✓	–	Available	MAIN WEAPON1 (Fore)
DART 23 ROCKET	wep_55_Rocket	C	D	–	Heavy	600 ✓	–	–	–	MAIN WEAPON1 (Fore)
TERRIER SMH	wep_05_ASMissile	D	C	B	Heavy	45 ✓	4	Available	Available	MAIN WEAPON2 (Rear)
HOUND SMH	wep_60_ASMissile	B	C	B	Medium	18 ✓	4	Available	Available	MAIN WEAPON2 (Rear)
TOMAHAWK ALPHA RAIL GUN	wep_03_Cannon	C	C	–	Medium	75 ✓	–	–	–	MAIN WEAPON3 (Lower)

BROAD SWORD SG I is unidentified — NEEDS-HUMAN. Ammo Capacity 200 narrows it to wep_38 / wep_41 / wep_42_Shotgun (all LoadingCount = 200); "SG" and the GUN tab fit a shotgun. wep_42 is excluded by range (2500 m would not share class E with wep_38/ wep_41's 3000 m if the class is a pure range bucket), leaving wep_38 vs wep_41, which the panel cannot separate. Its Damage Class D also does not fit the Power bracket below (all three shotguns are Power ≤ 16, i.e. bucket E), so either the identification or the "Damage Class = bucket of Power" model is wrong for shotguns.

Letter-class brackets

Sorting the identified rows by their on-disc numbers gives monotone, non-overlapping bands:

Range Class   E: 3000                       (wep_01)
              D: 3500 · 4000 · 4000 · 4000  (wep_33, wep_37, wep_02, wep_05)
              C: 4500 · 5000 · 5000         (wep_55, wep_04, wep_03)
              B: 6500 · 6500                (wep_24, wep_60)

Damage Class  E: 10 · 14 · 16               (wep_33, wep_01, wep_37)
              D: 70 · 75 · 100              (wep_24, wep_04, wep_55)
              C: 200 · 400                  (wep_03, wep_05)

Two consequences for the reimplementation:

• The thresholds are not pinned — only bracketed (e.g. the D/C range boundary lies in (4000, 4500]). More weapons, or a static read of the title-code table, would pin them.
• They bracket the defaulted numbers: wep_02_Missile's defaulted Power sits in the D band (≈ 17…150 by the observed edges) and wep_60_ASMissile's in the C band (≈ 150…500). 🟡 PROBABLE, and only as good as the bucket model.

How this was captured

Container recipe (sylph-container/mission.md), with two corrections worth keeping:

• Skip the intro movie with A. The brief warns it crashes; it does not. Skipping cuts boot-to-main-menu from ~13 min to ~1 min under lavapipe. (Thanks: user tip.)
• The title screen falls back to the attract loop within a few seconds, so a screenshot→look→tap cycle always misses it. Poll the framebuffer and tap in the same process. Both are automated in scratchpad/skip_intro.sh (movie detected by frame-to- frame RMSE; title by the green Ⓐ glyph at pixel 625,618).
• Under lavapipe the game polls input at its own low frame rate: a 60 ms d-pad tap is dropped roughly half the time; 200 ms is reliable and 300 ms starts to auto-repeat.
• The Hangar hard-point weapon carousel is cycled with d-pad down, not left/right.

Path: title → A → LOAD GAME → slot 01 → Load game? YES → READY ROOM → ARSENAL → type tab (LB/RB) → Y for the DATA SHEET → d-pad down through the list.

Open / next

• Only 9 weapons of ~61 are revealed at 5 % completion, and none of the four whose LoadingCount is defaulted (wep_11, wep_28, wep_36, wep_70) is among them. Progressing the save (or a later save) is what unlocks the rest — the panel itself already shows undeveloped weapons, so no points need to be spent.
• Craft (UNIT-schema) defaults are not reachable this way. The Hangar exposes exactly one craft-level runtime number, Gross Weight (a class, "Light"). The defaulted craft fields (ShieldRatio, BarrelRoll_Count*, HoldPosition_*Ratio, Slalom_TurnCount_Max, UsingChaffRatio, …) are AI/flight-model constants with no UI surface; they would need in-flight behavioural measurement or a guest-memory read, not a menu screenshot.
• The Sight Homing / Lock on Overlap on-disc partners are still unidentified.

Screenshots for every row above: /sylph-home/re/caps/ in the container.

Evidence PNGs are committed under captures/weapon-datasheet/ (64-colour quantized for size; the numbers stay legible).