reasampler/COMPLETED.md

COMPLETED.md — ReaSampler landed milestones

Completed milestone entries removed from PLAN.md. Each entry preserves its original Goal, Verify, and checklist points with boxes marked done.

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Milestone 0 — Transition scaffold: reaper_mpeview → ReaSampler

Goal: Retire the MPE scaffold and stand up the sampler's pure core in its place, preserving the pure-core / REAPER-shell split. Verify: cmake -B build -S . configures clean; cmake --build build builds the renamed extension target and the pure-core test target; ctest --test-dir build is green with the new bank_model + peaks suites present.

• Delete src/mpe_model.{h,cpp} and src/mpe_view.{h,cpp}; remove tests/test_mpe_model.cpp.
• Rename the CMake project() and the extension MODULE target from reaper_mpeview to reaper_reasampler (binary OUTPUT_NAME likewise); update PREFIX "" / platform SUFFIX blocks to the new target name.
• Replace the pure mpe_model static lib + mpe_model_tests executable with bank_model (pure static lib) + bank_model_tests; keep the CTest wiring.
• Repoint src/main.cpp: drop the mpe_view.h include and all MpeView_* calls (toggle / IsOpen / OnTimer / Cleanup); stub the extension entry so it loads, logs to console, and registers nothing MPE-specific. The command_id / gaccel / hookcommand registration pattern is preserved for reuse (CLAUDE.md §REAPER extension contract) — the MPE action string is removed.
• Choose and record the persistent action-id prefix for the sampler family (replaces CEREBELLUM_MPEVIEW_TOGGLE); this string is forever-stable once shipped (CLAUDE.md §action registration).
• Refresh README.md layout/next-step sections to the sampler module set. (Landed-work reflection is doc-keeper's; this point exists so the stale MPE README does not mislead the first implementer.)

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Milestone 1 — bank_model + JSON round-trip (pure)

Goal: The Sample metadata struct and BankIndex (add / remove / query / tier moves / dedup-by-hash) with JSON serialize/deserialize to std::string. CONTEXT.md §Data model, §Module architecture. Verify: CTest green. Round-trip is lossless (deserialize(serialize(x)) == x) across all fields; dedup-by-hash and tier filtering asserted; relative paths only invariant enforced at the model boundary (no absolute path accepted/stored).

• Define Sample with the full field set (id, display name, relative path, source mode, source range in project time + PPQ, track GUID(s), wet/dry, channels, SR, length sec + beats, capture tempo, optional key, peak/RMS/LUFS, clip flag, tier, content hash, provenance, created ts). CONTEXT.md §Data model.
• BankIndex: ordered collection keyed by id; add / remove / query.
• Hash lookup for dedup-by-content-hash.
• Tier model (scratch | archive) + tier-move + tier filtering; scratch marked auto-prunable.
• JSON serialize/deserialize to/from std::string.
• Tests: full-field round-trip lossless; dedup collapses equal-hash adds; tier filter/move correct; relative-path invariant rejects absolute paths; empty-index and malformed-JSON edge cases.

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Milestone 2 — peaks (pure)

Goal: Compute waveform min/max bins from raw PCM, dependency-free (not REAPER's peak API). CONTEXT.md §Module architecture, §Non-goals. Verify: CTest green. Fed a known signal (full-scale sine, ramp), asserted min/max envelope per bin matches expected within tolerance; channel count preserved; bin count honored for arbitrary sample lengths (incl. remainder bin).

• Min/max bin computation from interleaved PCM given a target bin count.
• Multi-channel handling (per-channel envelope; no silent fold).
• Tests: sine envelope ≈ ±amplitude; ramp envelope monotonic; DC/silence → zero envelope; short-buffer and non-divisible-length edge cases.

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Milestone 3 — Offline capture spike (REAPER shell)

Goal: Offline-render the time-selection master mix to a wav in the project bank folder, add a Sample, log it. The render-driving spike. CONTEXT.md §REAPER API surface (offline render), Build order 3. Verify (in DAW): Render runs via Main_OnCommand(42230) ("Render using most recent settings") — REAPER always shows its offline-render progress window; no stock/header-documented fully-headless path exists. File lands in the project-relative bank folder at 32-bit float WAV at project rate (lossless, dither-free → enables bit-identical/null-test). A Sample is added to the in-memory BankIndex. Non-destructive. Unsaved-project state triggers a Save-As prompt; capture is refused if the user cancels (no default-location fallback). Bit-identical repeats: two identical requests produce byte-identical files. Exact bounds: rendered length matches the requested range (no rounding, no added silence without an explicit tail).

• ICaptureBackend interface + CaptureRequest (source mode, time range, wet/dry, tail, SR/bit-depth/channels, output path). CONTEXT.md §capture.
• OfflineRenderBackend: drive GetSetProjectInfo render settings + GetSetProjectInfo_String file/pattern/format; verify every flag against vendor/reaper-sdk/sdk/reaper_plugin_functions.h.
• Resolve the no-dialog render command/flag on the current REAPER build (open question) and confirm it runs headless.
• Populate a Sample from the finished file; hand to bank_model; console-log.
• Verify bit-identical repeats and exact-bounds by hand on a known range.