reasampler/PLAN.md

PLAN.md — ReaSampler milestone roadmap

Living milestone roadmap for ReaSampler. Derived from CONTEXT.md's 11-step build order; CONTEXT.md remains the authoritative spec — this file is the tickable checklist, not a re-statement of the spec. When a point lands, doc-keeper removes it here and appends it to COMPLETED.md.

Conventions

• One checkbox - [ ] = one discrete, independently-landable point.
• Each milestone opens with a Goal (one line) and a Verify criterion (the acceptance gate; precision invariants pulled in where one applies).
• Verify-in-DAW points require a manual REAPER run; pure points are gated by CTest.
• "See CONTEXT.md §…" points at the authoritative detail — do not duplicate it here.

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Milestone 8 — RealtimeRecordBackend

Goal: Realtime record behind the same ICaptureBackend, producing identical bank entries. CONTEXT.md §capture (realtime), §Precision invariants. Verify (in DAW): Hidden temp track resamples wet output; recorded file moves into the bank; non-destructive — temp track removed cleanly, source routing and user monitoring restored unchanged.

Note (from M3): The realtime backend captures during playback and does NOT invoke the offline-render path, so it is inherently dialog-free (no render-progress window) — a secondary benefit beyond hardware/performed-FX capture.

• Hidden-track resample recipe (I_RECMODE/I_RECINPUT/I_RECARM, CSurf_OnRecord/CSurf_OnStop); verify record-mode values against SDK.
• Resolve wet-master routing that does not alter user monitoring (open question).
• Move recorded source into bank; populate identical Sample; clean teardown.

Milestone 9 — slots (MPC-style)

Goal: "Capture to slot N" / "insert slot N", MIDI-bindable. CONTEXT.md Build order 9. Verify (in DAW): Slot capture and slot insert fire from MIDI bindings; slot state persists via the index.

• Slot model + slot↔sample assignment.
• "Capture to slot N" / "insert slot N" actions, MIDI-bindable.

Milestone 10 — provenance + null-test verify action

Goal: Provenance (parent sample id + FX-chain snapshot) and "re-capture from source"; ship the null-test verification action. CONTEXT.md §Precision invariants, Build order 10. Verify (in DAW): Null test — a dry offline capture of a range, re-inserted at its source position, nulls to silence against the source. This action is the tool's trust anchor and must pass.

• Provenance fields populated on resample-from-sample (parent id + FX-chain snapshot string).
• "Re-capture from source" action.
• Null-test verification action (capture → re-insert at source pos → assert silence sum).

Note (from M7): The null test requires a TRUE pre-FX dry capture, which REAPER offline render cannot produce via RENDER_SETTINGS (there is no pre-FX bit). True dry must be obtained by bypassing the source FX around an offline render (snapshot→bypass→render→restore) OR via the M8 realtime pre-FX path — so the dry-capture mechanism should be designed as part of the M10 null-test work.

Milestone 11 — polish

Goal: Batch capture (per selected item / per razor area), resample-and-mute-source, conform-on-insert, native OS drag-out. CONTEXT.md Build order 11, §Non-goals (drag-out deferred to last). Verify (in DAW): Each polish action works without regressing the precision invariants; drag-out places a valid file in the OS target.

• Batch capture: per selected item / per razor area.
• Resample-and-mute-source.
• Conform-on-insert (explicit).
• Native OS drag-out (deferred final; InsertMedia path must already work).

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Open questions to resolve during build

Carried from CONTEXT.md §Open questions — keep visible until each is closed by a landed milestone.

• Realtime wet-master routing that captures master output without altering the user's monitoring. (blocks M8)
• parseInt narrowing hardening: src/bank_model.cpp parseInt casts int64_t → int via static_cast without a range check; integers that fit in int64 but exceed INT_MAX are implementation-defined. Hardening candidate — add bounds check before the cast when integer-field validation is in scope.

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Phase B — Multi-bank (parallel to the M0–M11 capture roadmap and Phase D)

Separate phase namespace. The M-numbers belong to the capture pillar (M0–M11); the D-letters belong to Design View. Multi-bank is a third orthogonal pillar — generalizing the single bank into a pool + named banks — so it takes its own lettered namespace (B1, B2, …). "B" reads for Banks and, like Phase D, keeps the roadmaps from colliding on numbering: Phase B is not "the twelfth capture step," it is a different pillar. Authoritative spec: CONTEXT.md §Multi-bank. Product framing: docs/product/multi-bank.md. When a point lands, doc-keeper moves it to COMPLETED.md.

B1 — bank_book (pure)

Goal: REAPER-free bank registry wrapping N BankIndex instances: pool seeded + privileged, create/rename/reorder/delete named banks, active-bank id, move/copy a sample between banks, JSON round-trip + legacy-migration. The heart of the phase; mirror of bank_model / view_mode_model; BankIndex untouched (additive). CONTEXT.md §Multi-bank (Module architecture — pure). Verify: CTest green. Pool always present, un-deletable, un-renamable, un-evacuable (rules rejected in-model). Active-bank defaults to pool. Move is index-only (source loses entry, destination gains it) and observes destination collapse-by-hash; copy leaves source intact. Delete drops member index entries. Evacuate moves all members to the pool, leaving the bank empty. JSON round-trip lossless across pool-as-bank-zero + named banks + per-bank indices + ordinals + active id. Legacy bank_index JSON parses into { pool } with zero named banks.

• Bank registry: ordered { bank id, display name, ordinal, BankIndex }; pool seeded with fixed id + fixed name; create / rename / reorder / delete named banks (delete drops the bank's member index entries).
• Pool-privilege rules enforced in-model: reject delete-pool, reject rename-pool, reject evacuate-pool, never allow zero banks.
• Active-bank id (get/set; defaults to pool); resolve active bank's BankIndex.
• Move sample between banks (index-only; destination collapse-by-hash observed; source entry removed).
• Copy sample between banks (index-only; source entry retained; destination collapse-by-hash observed).
• Evacuate bank: move every member to the pool (index-only; destination collapse-by-hash observed), leaving the bank empty; pool cannot be evacuated.
• JSON round-trip: pool-as-bank-zero inside the blob + named banks + per-bank indices + ordinals + active id.
• Legacy migration: a bare bank_index JSON promotes to the pool's index with zero named banks (one-way, lossless; blob authoritative thereafter).
• Tests: pool privileges (delete/rename/evacuate rejected); move source-loses/dest-gains; copy source-retained; evacuate empties source into pool with dest collapse; cross-bank same-hash coexistence; dest collapse on move into a bank already holding the hash; JSON lossless; legacy migration.

B2 — persist slice (banks ↔ project ext state)

Goal: Serialize the book under the banks key in "reasampler" alongside the existing sections, with the pool folded in as bank-zero; migrate a legacy bank_index key into the pool on first load and retire the legacy key; reload-on-open and Save-As survival via the existing M4 machinery. CONTEXT.md §Multi-bank (persist). Verify (in DAW): Banks + named banks + active bank + all per-bank samples survive Save / Save As / close+reopen; relative paths only; bank travels with the .rpp; a project saved before this phase (legacy bank_index only) loads as pool + zero named banks with no sample loss, and after save carries banks with no bank_index written. Depends on: B1. (Persistence-key fork settled — fork 1 (a): pool inside the banks blob, legacy key retired after one-way migration.)

• Serialize/deserialize the book under the banks key (pool-as-bank-zero inside the blob; distinct section from view_state; no bank_index key written going forward).
• Legacy-migration path on load: absent banks + present bank_index → promote into pool, mint the blob, treat blob as authoritative (legacy key retired).
• Session exposes the book; the active bank's BankIndex is the capture add target (route the M7 capture family through it — additive to M7, no M7 rewrite).
• Confirm survival across Save / Save As; confirm legacy-project load path.

B3 — actions

Goal: Bindable action set for the multi-bank workflow. CONTEXT.md §Multi-bank (actions). Verify (in DAW): Each action registered (bindable in Actions list); bank-activate + move/copy + evacuate MIDI-bindable; create/rename/delete/evacuate drive the B1 model via the B2-persisted session. Depends on: B1, B2.

• Create bank / rename bank / delete bank (delete drops member index entries; confirm-on-non-empty offered at the UI layer in B4).
• Evacuate bank → pool (move all members back to the pool; refuses on the pool).
• Activate bank (direct-by-id + cycle).
• Move selected samples → bank / copy selected samples → bank (move is default).
• Pool full-height / banks full-height toggles.
• Register each (command_id/gaccel/hookcommand); bank-activate + move/copy
  • evacuate MIDI-bindable.

B4 — bank_panel vertical split (UI)

Goal: The vertical-split bank window — pool on top, named-banks tab-page region below, full-height toggles — extending the M5 docked grid. CONTEXT.md §Multi-bank (bank_panel). Verify (in DAW): Pool grid renders on top; named-banks tab strip below (empty when no named banks, one tab per named bank); active-bank unmistakably indicated; both full-height toggles collapse the split correctly; sample move/copy affordance works; non-empty delete confirms and offers evacuate; the Design View mode switch in the header is unaffected. Depends on: B1, B2, B3. (Tab rendering + move-affordance mechanics — fork 5 — pending Daniel's decision; see Phase B open questions and product notes → Fork 5.)

• Vertical split: pool grid region (top) + named-banks tab-page region (bottom).
• Named-banks tab strip: one tab per named bank; empty state when none. (SWELL-native vs. LICE-drawn — fork 5a, pending.)
• Pool full-height / banks full-height toggle affordances wired to B3.
• Active-bank indicator — visually unmistakable (settled constraint); placement (per-region header / single readout / lit-tab) is the residual polish detail.
• Create / rename / delete / activate / evacuate affordances driving B3 actions.
• Delete confirms on a non-empty bank, naming the evacuate alternative.
• Sample move/copy affordance (drag between regions and/or "send to bank" menu — fork 5b, pending).

Phase B open questions

Forks 1–4 settled by Daniel (2026-07-23): persistence key = fold pool into banks, retire legacy key (1a); delete drops members + add evacuate verb (2); move is the default gesture (3); active-bank/shown-tab distinct with an unmistakable indicator (4). Folded into CONTEXT.md §Multi-bank + the B1–B4 points above. Remaining:

• Fork 5 — tab rendering + move affordance — (5a) SWELL-native tab control vs. LICE-drawn tabs matching the grid aesthetic; (5b) drag-between-regions vs. "send to bank" menu vs. both. Options analysis + pending recommendations in product notes → Fork 5. Verify SWELL tab-control availability + cross-platform parity against the SWELL headers / SWS reference before choosing native tabs. Decision pending Daniel. (touches B4)
• Active-bank indicator placement — per-region headers vs. single header readout vs. lit-tab. "Unmistakable" is settled; only placement is open. Polish detail. (touches B4)