The adapter placement snapshot separates an exit's original requested amount from the native working reservation made for that request. It replaces the retired compatibility booleans that mixed those lifetimes.

QuantityIntent contains exactly one of Units(amount), Fraction(numerator, denominator) or All. Fractional requests retain their original representation; the Pine boundary supplies percentages as P / 100 without a floating-point divide/multiply round trip. An absent request belongs to pending commands outside this exit-request contract. These are request descriptors, not an additional numerical-admission policy.

QuantityReservation records admitted units and the exposure basis used when reserving them. A new request clears the old reservation; a reservation cannot exist without an original request. Deferred exits acquire this receipt when a live owner is bound. Additional per-entry bindings copy the original request and record their own admitted amount and basis. Copying is by value.

qty and qty_percent retain their current executable/reserved meaning in the existing order paths. OCA can reduce executable quantity without changing the original intent or its prior reservation receipt. Whether that receipt covered less than its basis is a derived numerical comparison, using the existing caller-supplied tolerances. A deferred fraction can be classified before resolution; an unbound Units request cannot infer coverage without a numeric basis.

Consequently, a half-position request rounded to a minimum one-unit slot may have Fraction(50, 100) intent and a full 1 / 1 reservation. Conversely an All request clipped behind another reservation may hold only 3 / 4 of its basis. Neither case can be represented correctly by one “partial” label.

Deferred market-close instructions are another producer: strategy.close has already resolved its source amount to a placement target before queue_deferred_close_order runs. The request records that resolved source target as Units(qty_to_close), without an exposure reservation until a later layered binding occurs. This is not a fixed executable-quantity promise: the preserved Pine ANY-relative rule can turn target 1 on E2 into reservation 2 with basis E4 after reversal. The initial target remains 1 while executable qty and the later reservation are 2. It does not claim to retain the original Pine percentage expression; that conversion already occurred. This preserves the old initial nonpartial classification without fabricating a basis.

The Pine percentage rounding, minimum-slot, reservation retention, one-shot exit-ID and deferred/replacement policies remain explicit compatibility debt in their existing callers. This change does not generalize those policies or change their thresholds, financial assertions or execution order.

The public pf_pending_order_v1_t retains its complete existing field prefix. Its requested_partial and full_percent_exit_request fields are deprecated read-only projections derived from the new authoritative values; native decisions never read those output fields. New fields append:

quantity_intent_kind: 0 absent, 1 Units, 2 Fraction, 3 All.
The relevant units or fraction numerator/denominator; inactive values are 0.
Reservation presence, admitted units and basis units.

All new facts and optional-presence discriminators participate in broker hashing and mirror output. They are not waived. C ABI version 4 and stream API version 1 remain unchanged, and size-limited mirror reads preserve older callers. The internal C++ layout changes, so all consumers require a matching rebuild and the integrated representation change requires a new internal namespace/fingerprint epoch before publication.