Files

T

daniel 27712b7573 docs: retire Phase Gamma from PLAN.md; repair stale line/symbol citations across PLAN, the Lambda build-toolchain audit note, and root CLAUDE.md

2026-08-02 22:31:54 -04:00

100 KiB

Raw Blame History

PLAN

The post-1.0 roadmap. Seventeen queued items consolidated into overlapping areas and sequenced into a Phase → Wave → Track hierarchy that implementation specialists can be dispatched against directly — plus Phase Γ, which did not come from those seventeen (it came from a direct interview, 2026-08-01) and is scoped in docs/product/instrument-control-surface.md, and Phase Ψ, which likewise did not come from the seventeen: it came from a direct list of seven defects and refinements (Daniel, 2026-08-01); it has landed, and now that its section here is retired, the list is carried verbatim in docs/COMPLETED.md — there is no backing product doc for it, and Phase Ε, which likewise did not come from the seventeen: it came from a direct request (Daniel, 2026-08-02) and is scoped in docs/product/bank-package.md, and Phase Ρ, likewise a direct request (Daniel, 2026-08-02), scoped in docs/product/render-in-place.md, and Phase Λ — the Linux port of both artifacts — likewise a direct request (Daniel, 2026-08-02), scoped in docs/product/linux-readiness.md.

What this doc is, and how it relates to the others

docs/PLAN.md (this file) — the active on-deck specification list. Each track is written so a specialist brief is writable from this file alone: goal, consolidated source items, surface boundary, behavior, acceptance criteria, open questions, prerequisites.
docs/TODO-1.0.md — retained as the verbatim-provenance appendix. It holds Daniel's raw asks and every answer round, unedited; where this plan compresses a behavior bullet, that file is the backing record. Items are cited here by number (e.g. "consolidates items 1, 8, 14"). It is not a work queue any more; this file is.
docs/TODO.md — deferred follow-ups with recorded rationale, unrelated to the seventeen (with one flagged intersection: see "Flagged for awareness" below).
docs/COMPLETED.md / docs/ARCHIVE.md — doc-keeper's. When a track here finishes, its point is removed from this file and appended to COMPLETED.md with any deviation between landed code and spec noted.
docs/product/ — the product-design reasoning behind prior phases. Grep for a cited section rather than reading a file whole.

Worktree slug convention: p<phase>-w<wave>-t<track>-<slug>. Greek phase letters transliterate: Θ → th, Ξ → xi, Γ → g, Ψ → psi, Ε → e, Ρ → r, Λ → l. So Θ-W1-T1 dispatches into pth-w1-t1-zone-retirement, Γ-W1-T1 into pg-w1-t1-knob-interaction-law, Ψ-W1-T1 into ppsi-w1-t1-capture-range-exactness, and Λ-W2-T1 into pl-w2-t1-linux-compile-blockers (Phase Λ's two audit tracks already ran under pl-w1-t1-build-toolchain-audit and pl-w1-t2-source-runtime-audit).

Decision state

Everything carried forward from TODO-1.0.md is classified [verify] (answerable by reading code or running the DAW) or [propose] (a design call made at implementation review with a proposal, not a Daniel call); that classification is preserved per question, attached to the track that will answer it.

Read the Phase Λ paragraph below before relying on the plan-wide "nothing is unanswered" claim the Γ, Ε and Ρ paragraphs make. Λ (added 2026-08-02) carries four open [Daniel]-class forks, so that claim is no longer true of the plan as a whole; it is true of every phase except Λ, and Λ's paragraph states exactly which of its four forks gate anything.

Θ-W3-T1's two genuine [Daniel] questions — which no amount of code-reading could answer — are both ruled on and the track has landed; see docs/COMPLETED.md for the full narrative. Reload tier = Grouping B (continuous knobs live: filter cutoff/Q/ morph/drive/mod amount/key-track, every envelope stage time and level; root note, loop span, and start frame still trigger a full reload). Mid-stage rule = candidate (iv), hold normalized stage position (φ = elapsed/duration held fixed across a duration change, then advancing at 1/newDuration). Phase Γ opened six [Daniel]-class forks (Γ-F1…Γ-F6) and all six are ruled (Daniel, 2026-08-01) — the rulings are folded into the tracks below and indexed in docs/product/instrument-control-surface.md §8. Γ-F6 closed with a correction to the analysis, not merely a ruling: dynamic reported latency is routine for VST3 instruments and REAPER handles it as a matter of course; what makes the mandated restart expensive here was self-inflicted (setActive(true) called reloadInstrument), so the cost was ours to reduce. That reduction landed in Γ-W3 — see docs/COMPLETED.md.

Γ-F3 was subsequently REVERSED and a seventh fork opened AND CLOSED, all by Daniel's later rulings of 2026-08-01. Γ-F3 ("the stage-time ceiling stays 2.0 s") is replaced by "extend the stage lengths to 10s" — the ceiling moves in Γ-W1-T1. Γ-F7 (the VST3 parameter order) is RULED: signal flow — "signal flow order." There is now NO unanswered [Daniel]-class question anywhere in this plan.

Phase Ε (added 2026-08-02) opened three more [Daniel]-class forks and ALL THREE ARE RULED, same day (Daniel, 2026-08-02): Ε-F1 container format — "proprietary container", the hand-rolled RSBK; Ε-F2 import target — "always lands as a new bank, with an auto suffix if name collision"; Ε-F3 import under a degraded tracking ledger — "refuse mismatched import." Ε-W1 through Ε-W3 have landed; see docs/COMPLETED.md for the full narrative, and the rulings remain indexed at docs/product/bank-package.md §"Rulings". Two of the three landed somewhere other than the framing recommendation: Ε-F2 dropped the proposed rename prompt in favour of a deterministic suffix, and Ε-F3 reversed allow-with-confirm to refuse — carried by the framing's own counter-argument, that the accepted tracking residual contemplates one untracked capture while a bulk import strands hundreds in a single gesture. The plan-wide claim above therefore holds unqualified — no unanswered [Daniel]-class question remains anywhere in this plan, Phase Ε included — and no track in this plan is gated on a decision.

Phase Ρ (added 2026-08-02) opened three more [Daniel]-class forks and ALL THREE ARE RULED, same day (Daniel, 2026-08-02): Ρ-F1 multi-track — "refuse", one track per fire, a settled non-goal rather than a deferral; Ρ-F2 the result track's mode — "for this action which is not a capture, the result track should always go to arrange"; Ρ-F3 tail — "follow panel tail settings." Ρ-W1-T1 has landed; see docs/COMPLETED.md for the full narrative, and the rulings remain indexed at docs/product/render-in-place.md §"Rulings". Ρ-F2 overrode the request's own original wording ("stays in whatever mode was active") and is the only one of the three that changed the spec: the result track is now an Arrange member unconditionally, the A/B-on-the-bench behaviour mode-following would have enabled is gone, and the ruling pulls in a two-line fix to the panel's auto-tag detector that would otherwise reverse it on the next timer tick. The plan-wide claim above therefore still holds unqualified — no unanswered [Daniel]-class question remains anywhere in this plan, Phase Ρ included — and no track in this plan is gated on a decision.

Phase Λ (added 2026-08-02) breaks that unqualified claim, and it is corrected here rather than left to be discovered. The claim as written in the three paragraphs above — "no unanswered [Daniel]-class question remains anywhere in this plan" and "no track in this plan is gated on a decision" — is now scoped to Θ, Ξ, Γ, Ψ, Ε and Ρ. It is still true of all six. It is not true of Λ. Λ opened four [Daniel]-class forks and NONE of them is ruled (Λ-F1 CI; Λ-F2 the dialog-resource route; Λ-F3 the copy-only drag-out invariant's wording; Λ-F4 the declared support floor). Each is stated with the evidence for both sides at docs/product/linux-readiness.md §"Open forks — Daniel's", and the Phase Λ section below carries them as a table. What they gate is narrow and is not a matter of judgement:

Λ-F2 is the only one that gates a dispatch — Λ-W2-T3 panel-dialog-resource cannot be briefed until the route is chosen, because the two routes own different files. Leaving it open does not stall the phase; it slips that one track to Λ-W4 and splits Λ-W3's verification sweep into two Linux sessions, which is the fork's actual price.
Λ-F4 gates the ship wave, not a dispatch. Λ-W2 can record a floor and widen it; Λ-W5 cannot ship an artifact that does not say what it runs on. Answerable any time before Λ-W5-T1 is briefed.
Λ-F1 and Λ-F3 gate nothing at all. Λ-F1 (CI) decides only which paragraph Λ-W5-T1 writes; Λ-F3 decides one sentence's wording inside an edit Λ-W4-T3 makes either way.
The other eleven Λ tracks are dispatchable against open forks, in the sense that none of them waits on a decision. What every Λ track waits on instead is a Linux box — a different kind of unknown, and the reason Λ-W3 exists.

Λ's six [Daniel] rulings of 2026-08-02 are settled and are recorded in the phase section below in the same shape as Γ's: the instrument is in scope; SWELL is reached by dlopening REAPER's own libSwell.so rather than vendoring it; the editor is REAPER-only but every other host must degrade safely; macOS is out; the Linux artifact is shipped rather than developer-only; and a hard unlink prune is acceptable with a platform-aware confirmation. Do not re-litigate them.

Ruling 3 (Daniel, 2026-08-01) — real units at the host boundary. "The parameter values exposed to the VST host should be in real units, such that the host automation lanes report usable values." Satisfied through VST3's plain-value layer, not its wire format (which is normalized and cannot be otherwise): toPlain/toNormalized, getParamStringByValue and ParameterInfo::units. Specified at docs/product/parameter-automation.md §6.7 — the per-category unit/precision table, the one-formatter invariant, the stepCount sweep, and the resolution of the apparent conflict with the filter's re-taper prohibition. It lands entirely in Γ-W4-T1 and changes no wave boundary.

Flagged for awareness — not blocking, but decision-grade

Item 15's cross-artifact seam is RESOLVED — this is no longer an unknown. The instrument is a read-only bank consumer by invariant (src/shell/instrument/CLAUDE.md), and the one previous attempt at an instrument→extension relay (S13) closed with a DEGRADED spike verdict and was deferred (docs/TODO.md). Resample required that crossing. Ξ-W2-T1 ratified Decision 1 = (1b): the editor invokes the extension's bake action directly over the VST-host bridge (NamedCommandLookup/Main_OnCommandEx), no poller, no nonce — dissolving the S13 DEGRADED verdict rather than re-litigating it. The read-only bank invariant held: the crossing is a bridge call, not a shell-side bank write. See docs/COMPLETED.md for the full narrative.
The "Γ before Ξ-W2" ordering is VIOLATED, it was never Daniel's choice, and Γ now owns the correction. Daniel, 2026-08-01: "xi was started before I spun you up, we'll have to correct phase xi inside gamma. wasn't a choice." Ξ-W2-T1 (resample-bake-chain) ran ahead of this plan's sequencing claim, so the bake's settled reset scope — which enumerates parameters by name — ships incomplete: it cannot name rate, pitch offset or the limiter flag, none of which existed when it was written.

This is no longer a scheduling constraint to honour. It is a correction obligation with a named owner: Γ-W3-T2 bake-reset-amendment. The classification costs no Daniel decision — docs/product/instrument-control-surface.md §3.4 pre-classifies all three against Ξ-W2's own ratified rule (all reset) — but the amendment must be written against what Ξ-W2-T1 actually shipped, not against what this plan predicted it would ship. Ruling 1 adds a second correction of the same shape, homed on Γ-W4-T1 rather than here: see item 3.
The one-way doors are now IN-PHASE, and the sweep for them is a delivered artifact. Ruling 1 (Daniel, 2026-08-01) schedules VST3 parameter reporting inside Phase Γ, as Γ-W4-T1. Everything that participates in a parameter's normalization therefore freezes at the end of this phase rather than at the start of some later one, and anything that ought to move must move first.
- The taper (Γ-W1-T1) — known, and the reason this phase was ordered as it was.
- The stage-time ceiling 2.0 → 10.0 s (Γ-W1-T1) — Γ-F3 reversed by Daniel's "extend the stage lengths to 10s." A range endpoint is normalization exactly as much as the curve between the endpoints is.
- Two further doors that need action, both new, both landing on Γ-W1-T1: every default must have an exact normalized preimage (a host's reset-to-default has no resetDeckParam bypass to use), and the filter's four *Norm controls must not be re-tapered (their laws are already wire-frozen in payload v9).
- Six more constants freeze without needing to change, and three are already frozen for unrelated reasons; the complete sweep, with dispositions and with what was checked, is docs/product/parameter-automation.md §8. That doc is no longer scoping-only — §§6–10 are the specification Γ-W4-T1 is built from.

Phase-wide acceptance criteria

These bind every track in this plan and are stated once here rather than repeated per track. Phase Λ adds a set of its own, stated in its phase header.

Structural (root `CLAUDE.md`, Daniel 2026-07-28)

More directories is a must; more files is good; ~600-line file ceiling. The ceiling is the bar; a responsibility seam is the method. Bisection-to-hit-the- number is rejected. sampler_core.cpp (956 lines) is the standing documented hot-path exception — Θ-W1-T1 re-seams it, and any surviving over-ceiling TU must carry the same explicit justification.
Templates where earned — compile-time dedup with zero runtime cost, off the hot paths. Not for types that differ in name only.
SOLID is great, but saved CPU is better. No dispatch-stack blowouts anywhere; prefer static polymorphism where the types are compile-time-known.

Performance guardrails

Root CLAUDE.md's five extension-side guardrails (peaks envelope compute, audition, realtime-capture tick, JSON, FxBypassGuard) are unchanged by this plan; no track here touches them. The instrument adds a sixth surface that binds every Θ track:

process() — the per-voice-per-sample path — takes no new indirection. The filter tick, the envelope evaluation (staged and spline), the pitch-shift read, and the loop read all sit on it. Concrete, inlineable types only: no IEnvelope, no IFilter, no virtual per-voice tick(). A filter with two modes is a branch-predictable switch or a compile-time-known dispatch, never a vtable. Spline evaluation is a binary search over a point array, not a polymorphic curve object.
No allocation, no file I/O, no bridge call in process(). The off-audio-thread reloadInstrument + atomic pointer swap stays the only way new state reaches the audio thread. Every new parameter this plan adds follows that path.
A split that would add a hot-path indirection is out of scope — rework it or drop it.

Product invariants

Capture and placement are separate acts. No track here may place a timeline item. Item 15's bake explicitly must not, and one of its candidate architectures uses a temporary arrange mutation — that candidate must leave the arrange byte-identical.
Prune is the single, exclusive file-deletion authority. Item 15's "replace" never deletes bytes; item 17's consolidation may not weaken any protection prune has today.
The instrument never writes the bank. Item 15 is the first feature that needs to, and it resolves that by asking the extension, not by breaching the invariant.
Migration bar: a project saved before a change reopens sounding identical. Holds everywhere except item 16's genuinely-multi-zone case, where Daniel deliberately relaxed it.
Every pure module gets a <module>_tests target that runs without REAPER or a DAW. New pure modules in this plan are not optional-test.

Phase Λ — ReaSampler on Linux: both artifacts, shipped

Ships: reaper_reasampler.so and reasampler_9000.vst3 built, installed and documented on Linux. The extension compiles under GCC/Clang, builds optimized by default, docks its panel, writes a bank index that survives a comma-decimal locale, and prunes without lying about what it reclaimed. The instrument loads, scans, instantiates and processes audio in any Linux host, and opens its editor under REAPER only — a stated contract, not a shortfall. macOS is out.

Four named exceptions to platform parity, stated up front rather than discovered: prune deletes permanently (no trash); the OS drag-out's copy-only guarantee is conventional rather than structural, because SWELL's file-list drag takes no effect mask; the type faces are DejaVu rather than Segoe UI and Consolas; and the ReaSampler 9000 editor comes up under REAPER only, with every other host getting its generic parameter UI.

Consolidates: none of the seventeen. Phase Λ came from a direct request (Daniel, 2026-08-02) and is scoped in docs/product/linux-readiness.md, which is itself downstream of two landed audits: docs/product/audit-notes/lambda-w1-t1-build-toolchain.md (findings Λ-01…Λ-10, verify items V1…V10, forks D1…D7 — build system, toolchain, vendored deps, resources, test harness, packaging) and docs/product/audit-notes/lambda-w1-t2-source-runtime.md (L2-01…L2-12 — source portability and runtime behaviour). Grep those for a cited finding number; do not read either whole. This phase supersedes nothing, and corrects one standing promise rather than inheriting it: docs/product/versioning-and-release.md already commits in writing to "three platform artifacts per channel per release" (T1 §1e), which Λ-D4 makes two for now, with macOS named as deferred rather than silently dropped.

Nothing in this phase has been verified on a Linux machine. Every [verify — Linux] mark below is load-bearing and none may be laundered into settled voice. The structural consequence is stated once here because it shapes the whole wave order: Λ-W2's edits are authored blind from the audits' citations, and Λ-W3 is the session that discharges Λ-W2's acceptance criteria. Λ-W2 is not "done" in the usual sense until Λ-W3 runs, and a track that reports otherwise has laundered unverified work into landed work — which is exactly what the audits' [verify] discipline exists to prevent. Both audits state their own effort bands as provisional until the sweep runs; this plan does not restate a band the audits did not give.

Rulings — Daniel's, 2026-08-02. Six, settled.

Full statements with the reasoning Daniel gave: docs/product/linux-readiness.md §"Settled decisions (Daniel, 2026-08-02)". Do not re-litigate these.

Ruling	What it settled	Specified in	Bound into
Λ-D1	The VST3 instrument is in scope (audit fork D1 = Fork B). Both artifacts ship, not just the extension. Reverses D5's platform clause in writing — "Windows-only, VST3-only, REAPER-only" becomes "Windows and Linux; the editor is REAPER-hosted"; the VST3-only and REAPER-only clauses survive verbatim	§Λ-D1	Λ-W6…Λ-W8; the D5 rewrite is Λ-W6-T1's first act
Λ-D2	SWELL is reached by `dlopen`ing REAPER's own `libSwell.so` (route B3a). Route B3b — building SWELL into the module, and with it GDK/GTK3, FreeType, Fontconfig, OpenGL — is rejected, not deferred	§Λ-D2	Λ-W7-T1
Λ-D3	Non-REAPER hosts must be protected — "REAPER-only is good for now, but we need to protext other hosts." A first-class acceptance criterion of two tracks, not a footnote on one	§"The non-REAPER-host safety criterion"	Λ-W6-T2 (contract), Λ-W7-T1 (runtime), Λ-W8-T1 (regression)
Λ-D4	macOS is out (D3 = out) — "I don't have a mac to compile on." Shared macOS/Linux edits are still made in their shared form and noted as shared; what is out is macOS as a deliverable, any macOS verification, signing/notarization, and L2-11's APFS half. Do not "fix macOS while you're in there" — an unverifiable edit to the APPLE branch is worse than none, because it looks tested	§Λ-D4	phase-wide
Λ-D5	The Linux artifact is shipped, not developer-only (D6 = shipped), which promotes Λ-02 (a real optimized build) and Λ-08 (a documented install path) to must-fix. And a hard `unlink` prune is acceptable, with a platform-aware confirmation string saying so	§Λ-D5	Λ-W2-T2, Λ-W4-T1, Λ-W5-T1
Λ-D6	The X11 editor is real work and is sequenced last. Not a separate ruling — the direct consequence of D1+D2+D3. Everything before it ships something; halting Λ-W8 still leaves a shipped extension and a loading, processing, generic-UI instrument	§Λ-D6	the wave order itself

Open forks — four, NONE ruled

Stated with the evidence for both sides at docs/product/linux-readiness.md §"Open forks — Daniel's". This is the one phase in this plan with unanswered [Daniel]-class questions; see "Decision state" above for how that reconciles against the plan-wide claim.

Fork	Question	Recommendation	What it blocks
Λ-F1	Does CI get built in this phase, and on what runner? (audit D4)	No recommendation — genuinely a resourcing call. For: two toolchains and one is not on the developer's machine, so every Windows-only commit becomes a latent Linux regression. Against: CI is infrastructure, its value is highest after the first Linux build works, and a runner forces Λ-F4 immediately	Nothing. Decides only whether Λ-W5-T1 writes a pipeline paragraph or a "deferred to dev-ops" one
Λ-F2	The dialog-resource route: resource-id-0 (SWELL's documented escape hatch, `swell-functions.h:606–608`; deletes the whole resgen pipeline from non-Windows builds) or wire up resgen properly (PHP, `add_custom_command`, an include-shim TU — the M end of Λ-01's band)? (audit D7)	No clean recommendation; the asymmetry neither audit stated is the reason it is worth ruling. Route A is cheaper and structurally simpler and stakes the panel's file-drop ingest on an unverified `ChildWindowFromPoint` descent, because with no resource there is no `WS_EX_ACCEPTFILES` bit to set (L2-07). Route B can set that bit explicitly. A third option, if the cheap route is wanted without the exposure: take Route A and make the file-drop check a hard gate in Λ-W3's sweep, with Route B as an additive follow-up track rather than a rewrite — it spends a second Linux session in the bad case	Λ-W2-T3's dispatch — the ONLY fork here that gates a track. Unruled, that track slips to Λ-W4 and Λ-W3's sweep splits into two Linux sessions
Λ-F3	Does "copy-only is structural" survive as a shipped invariant? (T2 [Daniel] 4)	*Keep the invariant, scope the enforcement* claim to Windows** — "structurally enforced on Windows via `DoDragDrop`'s copy-only mask; advertised, not enforced, on SWELL, which takes no effect mask." The real counter: an invariant one platform cannot enforce is arguably not an invariant, and weakening the global wording would also correctly warn a Windows reader off relying on it in shared code	Nothing. Λ-W4-T3 makes the edit either way; only the sentence changes. Answerable at implementation review
Λ-F4	What is the declared support floor? (new — the audits raised the inputs Λ-07, V8, V10, not the decision)	Declare a narrow floor — current-stable-distro glibc, GCC ≥ 9, `x86_64-linux` only — and widen it on request. Counter: REAPER's Linux reputation is partly built on modest and non-x86 hardware, `aarch64` is no longer exotic, and adding it later means a second bundle directory and a second verification pass on every release	The ship wave, not a dispatch. Non-gating for Λ-W2 (a recorded floor can be widened); gating for Λ-W5-T1 — a shipped artifact has to say what it runs on. Also feeds Λ-W6-T1's bundle directory set and Λ-F1's runner image

Phase-Λ acceptance criteria

These bind every track in this phase, in addition to the plan-wide set above.

Windows behaviour does not change. Every track carries that criterion explicitly. This is a port; a port that improves Windows by accident has also changed Windows by accident.
[verify — Linux] is a status, not a decoration. A criterion carrying it is discharged by a recorded observation in Λ-W3's verification record — never by inspection, never by "should work". A track whose Linux criteria are all unrun is not landed; it is authored.
No vendored file is patched. git status under vendor/ stays clean through the whole phase, including the SWELL bootstrap — which is precisely the constraint that shapes it.
No new third-party dependency surface. Λ-D2 rejected route B3b for this reason: no vendored SWELL build, no GDK/GTK3, no FreeType, no Fontconfig, no OpenGL, no pkg-config in this tree. A track that finds itself reaching for one of those has drifted and stops.
Shared macOS/Linux edits are made in shared form and labelled shared (Λ-D4). Λ-01, Λ-03, Λ-04, Λ-07, Λ-09 and L2-09 are all shared by the audits' own marking; an #ifdef _WIN32 / #else that is right for both costs nothing and needs no mac. No macOS verification is claimed for any of them.
core/ stays pure and stays platform-neutral. Every #include under src/core/** is a core/ sibling, one of 26 standard headers, or the generated version_generated.h (T2 §1.1) — the audits verified this rather than assuming it, and no Λ track may be the one that breaks it. The one platform fork in the whole directory (capture_paths.cpp:18–20, the Windows case-fold) is already correct for Linux with both branches asserted by tests/test_capture_paths.cpp.
Every pure module gets a <module>_tests target that runs without REAPER or a DAW. Λ-W2-T4 is the phase's proof that this is not ceremonial: it is a core/-only fix, fully testable on the current Windows box, and it lands before any Linux session.
The ~600-line ceiling and the structural heuristics bind unchanged. Λ-W8-T1 is the track most likely to strain them; its own criteria name the seam vocabulary to reuse.

Performance posture. No named hot path is touched by any track in this phase — not the peaks envelope compute, not audition, not the realtime-capture tick's single-pointer-test idle fast path, not the instrument's process(). Two consequences are stated as criteria rather than left implicit: nothing is added to process() (no dlopen, no probe, no platform branch on the per-voice-per-sample path — the SWELL availability probe is computed once, lazily, off the audio thread), and Λ-W2-T4's locale fix stays on the JSON/persist path, which root CLAUDE.md already declares off all hot paths. Λ-02 is the phase's one genuine performance item and it runs the other way: today a Linux build carries no -O flag at all, on a tree whose peaks path is documented as presuming an optimizing build.

The non-REAPER-host safety contract

Λ-D3 stated as something a person can check. This is an observable contract, and it is the specification the two instrument waves are graded against — the full argument is docs/product/linux-readiness.md §"The non-REAPER-host safety criterion", which a brief for Λ-W6-T2, Λ-W7-T1 or Λ-W8-T1 must be written against.

The finding that makes it urgent, and it is a fact rather than a risk. The vendored vendor/WDL/WDL/swell/swell-modstub-generic.cpp declares a file-scope static at :125, so its constructor runs when our .so is dlopened — i.e. during the host's plugin scan — and :102 calls exit(2) when dlopen of libSwell.so fails, :117 exit(1) on an incomplete API table. Compiling the vendored SWELL_LOAD_SWELL_DYLIB path unmodified therefore means a Bitwig or Ardour plugin scan on a machine without libSwell.so terminates the host process — a killed DAW mid-scan, with the user's session. The mitigating detail that shapes the fix: doinit substitutes a zero-returning dummyFunc for each unresolved name, so a partial table degrades rather than crashes. A partial load is survivable; exit() is not.

In any Linux host, with or without libSwell.so: the module scans and enumerates its one class with no crash, hang, process exit or blacklist entry; it instantiates, produces audio, plays MIDI, and round-trips component state byte-identically with the Windows build; when no usable platform surface exists isPlatformTypeSupported returns kResultFalse for every type — including kPlatformTypeX11EmbedWindowID — and createView(kEditor) returns nullptr, never a view that then fails to attach and never one that draws nothing; the host falls back to its generic parameter UI; exactly one diagnostic line per process names why the editor is unavailable, through the SDK's logging or stderr, never a modal; teardown crashes nothing and leaves no partially-initialised SWELL table reachable.

Verified with a harness that is already on disk and that neither audit named, because neither swept the SDK's samples/ tree: vendor/vst3sdk/public.sdk/samples/vst-hosting/validator/ is a scriptable, headless, REAPER-free host, under public.sdk/ and therefore pulled by the documented narrow submodule init. The four checks, all [verify — Linux]: validator completes with no libSwell.so on the filesystem (the direct negation of the exit(2) finding, and the load-bearing one); a real Ardour or Bitwig scan reaching browser, instantiation and generic UI; a REAPER-on-Linux load where the editor opens; and a negative control — rename libSwell.so beside a Linux REAPER and confirm the generic-UI fallback plus the single diagnostic line.

Cross-phase boundary — Γ-W4-T1, and the frozen parameter table

Λ must never register a VST3 parameter. Γ-W4-T1's ParamID table is FOREVER-FROZEN from the moment it ships, on the same footing as the command-id strings and the class UIDs. A parameter minted in Λ to make a Linux fallback look better would collide with a table Λ does not own. This is a hard boundary and it is the only Γ↔Λ interaction that could actually go wrong.

Neither phase blocks the other. The host's fallback for a plug-in reporting no usable editor is its generic parameter UI, and today the plugin registers zero parameters — so "no editor" currently degrades to nothing rather than to controls. Λ-W6-T2's acceptance criteria are written to pass with zero parameters registered: an empty generic UI is a pass. Once Γ-W4-T1 lands its 44 derived parameters the identical Λ code path degrades to a usable generic UI instead — a better result, not a different criterion. Λ assumes no schedule for Γ; a Λ track needing a Γ fact reads dev at dispatch time.

Concurrency. Λ is the widest phase in this plan by file surface, and it is disjoint from the others by kind rather than by directory: its edits are platform guards, CMake, docs and one new shell/instrument/ TU. Γ owns core/instrument/ + shell/instrument/ sources (Λ-W6…Λ-W8 own that directory's CMake, its CLAUDE.md files, and editor_platform's non-Windows branch); Ε lands in the new core/package/ + shell/package/; Ρ touches core/capture, one new shell/capture TU, panel_input.cpp and main.cpp. The genuine adjacency to watch is CMake: Ε appends two add_subdirectory lines to the root CMakeLists.txt while Λ-W2-T2 owns that file's language and target settings — append-only lines against property blocks, textual adjacency rather than semantic contention. Λ's own shared files are named in the wave sections below.

Λ-W1 — The audits (complete)

Two tracks, both landed: T1 build-toolchain-audit (Λ-01…Λ-10, V1…V10, D1…D7) and T2 source-runtime-audit (L2-01…L2-12). Recorded so the wave numbering matches the audit filenames and branch names. Nothing to re-spec; nothing to dispatch.

Λ-W2 — Make it buildable, and make it honest

Depends on: nothing. Four tracks, disjoint at the file level. Three are authored blind against the audits and verified in Λ-W3; T4 is the one track fully verifiable on the current Windows box.

Track	Owns
T1 `linux-compile-blockers`	two source blockers + `main.cpp`'s API-load failure branch
T2 `toolchain-floor`	the CMake files' language, property and platform blocks
T3 `panel-dialog-resource`	`panel_window.cpp`'s dialog creation, `resource.rc` / `resource.h` — gated on Λ-F2
T4 `locale-independent-numerics`	the number codec in four `core/` TUs

Shared file in the wave, named rather than discovered at merge: src/app/CMakeLists.txt — T2 takes the property and platform blocks, T3 takes one target_sources line under the resgen route only. Disjoint regions; whichever lands second rebases. The wave's severity question is dissolved rather than adjudicated: T2 grades L2-03 a Blocker on failure-mode quality with no direct evidence and L2-04 a Major with a confirmed mechanism, and flags its own inconsistency — both land here, in different tracks, so the relative grade never has to be settled.

Λ-W2-T1 — `linux-compile-blockers`

Goal. The extension compiles and links under GCC/Clang, and when it refuses to load it says why instead of vanishing.

Spec: docs/product/linux-readiness.md §Λ-W2-T1; findings L2-01, L2-02, L2-03.

Surface boundary — owns: src/shell/panel/draw_kit.cpp (loadFont, :70–77), src/shell/actions/instrument_drop_win.cpp (writeTempPreset, :50–61), src/app/main.cpp (the REAPERAPI_LoadAPI failure branch only). Does not own: any CMakeLists.txt, panel_window.cpp, or any core/ file.

Behavior.

FF_DONTCARE (L2-01). draw_kit.cpp:73 passes DEFAULT_PITCH | FF_DONTCARE to CreateFont; the symbol has zero occurrences anywhere in vendor/WDL/, and the file is not platform-guarded, only its include is. draw_kit links into both modules, so nothing builds until this is fixed. Drop the term or define it locally in the non-Windows include branch. Do not add windows.h — L2-01's stated direction. The family bits are advisory to Windows' font mapper and meaningless to fontconfig.
GetCurrentProcessId() (L2-02). instrument_drop_win.cpp:59 calls it with no platform branch anywhere in the TU; SWELL exports GetCurrentThreadId and not this. The PID exists only to keep two concurrent REAPER instances from colliding in the shared temp dir, and the atomic counter at :52 already carries the intra-process half. Replace with a platform-neutral uniqueness source behind a guard.
The silent load failure (L2-03). Either switch main.cpp to REAPERAPI_MINIMAL plus an explicit WANT list — the pattern panel_window.cpp and panel_audition.cpp already use, and the honest inventory of what this extension actually needs — or keep the full load and print the failure count via rec->GetFunc("ShowConsoleMsg") before returning 0.

Acceptance criteria.

cmake -B build -S . -G Ninja && cmake --build build produces build/reaper_reasampler.so with no errors. [verify — Linux] = V1.
ctest --test-dir build --output-on-failure passes all 91 test targets, no -C flag needed on a single-config generator. [verify — Linux] = V2.
A deliberately misspelled WANT entry (or a forced non-zero failcnt) produces a visible REAPER console line naming the count, not a silent refusal.
Windows build and ctest unchanged.

Prerequisites. None. Discharges: L2-01, L2-02, L2-03; enables V1, V2, V3.

Λ-W2-T2 — `toolchain-floor`

Goal. The Linux build is optimized when asked, links what it uses, hides what it does not export, and reports diagnostics no one has seen yet.

Spec: docs/product/linux-readiness.md §Λ-W2-T2; findings Λ-02, Λ-03, Λ-04, Λ-05, Λ-07, Λ-09, Λ-10.

Surface boundary — owns: root CMakeLists.txt, src/app/CMakeLists.txt (the target property and platform blocks; NOT the source list — that is Λ-W4-T3's), cmake/reasampler_targets.cmake, src/shell/instrument/CMakeLists.txt (thread linkage only; the WIN32 gate is Λ-W6-T1's), README.md, and root CLAUDE.md §"Build and test" / §"Install / reload" / §"One-time submodule setup". Does not own: any .cpp or .h.

Behavior.

Λ-02 — root CMakeLists.txt:28–30 is the complete list of language settings: no CMAKE_BUILD_TYPE, no CMAKE_CXX_FLAGS, no IPO/LTO, no target_compile_options anywhere in the tree. Default CMAKE_BUILD_TYPE when neither it nor CMAKE_CONFIGURATION_TYPES is set, and correct the docs' ship instruction: --config Release is accepted and ignored by Ninja and Make, and the README currently sends a Linux user to build/Release/, which does not exist there — the module lands at build/reaper_reasampler.so.
Λ-03 — CXX_VISIBILITY_PRESET hidden + VISIBILITY_INLINES_HIDDEN on both module targets. SWELL's own build already uses -fvisibility=hidden, and the symbols that must stay exported carry their own visibility("default") attributes (reaper_plugin.h's REAPER_PLUGIN_DLL_EXPORT, fplatform.h's SMTG_EXPORT_SYMBOL, swell-modstub-generic.cpp:135's SWELL_dllMain).
Λ-04 — find_package(Threads REQUIRED) + Threads::Threads. Correct on all three platforms, costs nothing on Windows.
Λ-09 — -Wall -Wextra and CMAKE_CXX_EXTENSIONS OFF. No -Werror in this change (the audit is explicit): the diagnostic-set size over this tree is not estimable from Windows. Separately -Wl,--no-undefined on the module targets, restoring the fail-at-link-time behaviour MSVC gives and GNU ld does not — or a recorded reason why SWELL_PROVIDED_BY_APP's function-pointer design makes the gap moot.
Λ-05 — pin the reaper_plugin.h → ../WDL/swell/swell.h include coincidence with a comment or an INTERFACE target carrying both include dirs as one unit. Invisible on Windows, load-bearing off it.
Λ-07 — record the compiler floor (Λ-F4's input), or add -lstdc++fs and document why.
Λ-10 — one sentence in the platform-support docs: on Linux vendor/vst3sdk is optional until Λ-W6, so git submodule update --init vendor/reaper-sdk vendor/WDL is the complete extension-only prerequisite.

Acceptance criteria.

compile_commands.json or a verbose build log shows an explicit -O flag on a bare cmake --build build. [verify — Linux].
nm -D --defined-only reaper_reasampler.so | grep -E 'ReaperPluginEntry|SWELL_dllMain' finds both after the visibility preset. [verify — Linux] = V6.
The extension links with Threads::Threads removed — proving the include-only pthread dependency needs no flag — or the symbol forcing it is named. [verify — Linux] = V5.
capture_paths_tests links without an explicit -lstdc++fs on the declared floor, or the flag is added and the floor documented. [verify — Linux] = V8.
The warning count from the first -Wall -Wextra build is recorded, not fixed, and handed to Λ-W4 as an input.
Windows build unchanged; --config Release still behaves as documented there.

Prerequisites. None; concurrent with T1, T3, T4. Discharges: Λ-02, Λ-03, Λ-04, Λ-05, Λ-07, Λ-09, Λ-10; enables V5, V6, V8.

Λ-W2-T3 — `panel-dialog-resource` (GATED on Λ-F2 — do not dispatch until it is ruled)

Goal. The docked bank panel opens on Linux, and if it ever fails to, it says so.

Spec: docs/product/linux-readiness.md §Λ-W2-T3 and §Λ-F2; findings Λ-01, L2-06, L2-07.

The defect. panel_window.cpp:169 is CreateDialogParam(g_hInst, MAKEINTRESOURCE(IDD_BANK_PANEL), …), which SWELL resolves out of a per-module registry populated by a resgen-generated source file that is not in the Linux target: src/app/CMakeLists.txt:109 has the target_sources line commented out (:98 for macOS). The registry head stays null, SWELL_CreateDialog returns null, :171 returns, and the toggle action is a silent no-op — no console line, no Actions-list checkmark. Three defects stack inside the commented-out instructions themselves: the script named at :108 (mac_resgen.php) does not exist, the output filename is wrong, and the output is an #include-only artifact that cannot be a target_sources entry at all.

Surface boundary — owns: src/shell/panel/panel_window.cpp (the CreateDialogParam call at :169–171, the dialog proc's platform contract, the drop-accept opt-in at :179–184), src/resource.rc, src/resource.h, and — under the resgen route only — one target_sources line in src/app/CMakeLists.txt's else() branch plus a new include-shim TU. Does not own: any other panel TU, draw_kit, or any CMake target property. panel_window.cpp is deliberately not split across tracks: the L2-06 diagnostic and the Λ-01 resource route are the same function, and under the id-0 route the same line.

Behavior. Whichever route Λ-F2 picks, plus — unconditionally, and on both platforms rather than behind a guard — a one-line ShowConsoleMsg on the !g_panel.hwnd path naming the missing dialog resource (L2-06). That single line converts a mystery into a two-minute diagnosis and is worth having on Windows too. The fix is shared macOS/Linux either way (Λ-D4: made in shared form, verified on Linux only).

Acceptance criteria.

The panel toggle action docks a visible, LICE-drawn bank panel in a Linux REAPER. [verify — Linux] = V7.
With the resource deliberately unavailable, the toggle prints one console line rather than doing nothing. Verifiable on Windows by forcing the branch.
Dragging a WAV from the file manager onto the docked panel ingests it — or, if it does not, the failure is understood rather than mysterious. [verify — Linux], T2 §5 item 3. This criterion's difficulty depends on the Λ-F2 route and is the fork's substance.
Windows panel behaviour byte-for-byte unchanged.

Prerequisites. Λ-F2 must be ruled before dispatch. If it is not, this track slips to Λ-W4 and Λ-W3's sweep splits into a panel-independent half (run early) and a panel-dependent half (run after this lands) — a second Linux session, which is the cost of leaving the fork open. Discharges: Λ-01, L2-06, L2-07; enables V7.

Λ-W2-T4 — `locale-independent-numerics`

Goal. A persisted float round-trips identically regardless of process locale, so a bank index written on a comma-decimal machine is not written unparseable.

Spec: docs/product/linux-readiness.md §Λ-W2-T4; finding L2-04.

Why it is pulled forward, ahead of everything it looks like it should follow: it is the phase's one substantial fix that needs no Linux box at all — two writers and three readers, all in core/, all unit-testable on Windows today — and its failure mode is that the bank index is written unparseable and the project's whole bank is lost on reload. It should land before any Linux user saves a project.

Surface boundary — owns: src/core/json/json.cpp (the %.17g writer and the strtod reader), src/core/model/provenance.cpp (its own %.17g), src/core/wire/wire.cpp (Cursor::fieldDouble), src/core/capture/render_settings.cpp (the std::stod over REAPER's P_RAZOREDITS), and the corresponding tests/. Does not own: any shell TU, any CMake file, wav_codec (its byte-order handling is already explicit and correct).

Behavior. Make the number codec locale-independent at its two writers and three readers — std::to_chars/std::from_chars, or a std::locale::classic()-bound stream. Do not "fix" this by calling setlocale; an extension must not mutate the host's locale. Why it is not paranoia: on Windows the CRT starts in the "C" locale and nothing here calls setlocale, which is why it has never fired; on Linux SWELL's GDK backend calls gtk_init_check/gdk_init_check and never calls gtk_disable_setlocale, and any GTK or Qt plugin in the same process can do the same. The readers are honestly fail-closed — they require whole-token consumption — so the failure is "the field disappears", not "the field is silently wrong".

Acceptance criteria.

New pure tests pass on Windows today, under a forced comma-decimal LC_NUMERIC set inside the test. This is the one Λ-W2 track that does not wait for Λ-W3.
The bank index, view model, tracking ledger, provenance blob and tail setting all round-trip a fractional value under that forced locale.
Byte-for-byte identical output to today's writer under the "C" locale — this is a persisted format, and a changed representation is a compatibility event.
Nothing on a hot path is touched; the JSON/persist path is declared off all hot paths in root CLAUDE.md and stays there.

Prerequisites. None. Discharges: L2-04. Note: T2 §5 item 1 (read LC_NUMERIC inside a running REAPER-Linux process) stays in the Λ-W3 sweep, but only to record how urgent this was — the work is not gated on it.

Λ-W3 — First light, and the verification sweep

Depends on: Λ-W2. One track, deliberately — this is a person at a Linux box working a checklist where each answer reprices the next; splitting it across specialists buys no concurrency and loses the thread. Precedent: Ρ-W1 and Γ-W4 are both single-track waves for the same reason.

Λ-W3-T1 — `linux-verification-sweep`

Goal. Discharge every acceptance criterion Λ-W2 could not check from Windows, answer every [verify — Linux] item in both audits, and reprice the remaining waves against what is actually true.

Spec: docs/product/linux-readiness.md §Λ-W3-T1 and §"Why this sequence".

Surface boundary — owns: no source file and no CMake file. Its deliverable is a verification record at docs/product/audit-notes/lambda-w3-verification.md, one entry per item: the exact check run, the observed result, and what it changes. Any fix the sweep motivates is filed to Λ-W4, not made here. The one exception: a defect that blocks further sweeping (the build does not link at all) is fixed in place and recorded as a deviation, because the alternative is a wasted session.

Behavior — the sweep set.

From	Items
T1	V1 compile, V2 ctest, V3 does REAPER's Linux build call `SWELL_dllMain` and populate the API table, V4 where `UserPlugins/` actually is and whether `reaper_.so` is the right glob, V5 pthread link flag, V6 visibility vs. the two exported symbols, V7 the docked panel, V8 `-lstdc++fs`, V9 does `libSwell.so` sit beside REAPER's executable, V10* which `uname -m` values the VST3 bundle must carry
T2	process `LC_NUMERIC`; `REAPERAPI_LoadAPI`'s actual return value and the name of any gap; panel file-drop routing; which SWELL GDI/locale build REAPER ships; fontconfig's substitution for "Consolas"; `SWELL_InitiateDragDropOfFileList` acceptance by common targets, and whether its 500 ms no-motion timeout cancels a slow gesture; prune against an in-use file
New	the `-Wall -Wextra` diagnostic set, counted and categorised; whether `-Wl,--no-undefined` links clean or names an undefined set; whether the four-TU LICE slice links without `lice_colorspace.cpp` (T1 §3 leaves this an unreconciled inference)

Three items are load-bearing beyond their own answer and must be run FIRST: V1 (nothing else is observable until it passes); V9 (a negative answer voids Λ-D2's route and needs a Daniel re-ruling before Λ-W6 is dispatched — the entire dlopen-REAPER's-SWELL design rests on it, and it is a one-line ls); and the REAPERAPI_LoadAPI count (a non-zero result promotes L2-03 from a diagnostic to a real Blocker and names the gap).

Acceptance criteria.

Every item above has a recorded answer or an explicit "could not determine, because X". A blank is a failure of this track, not a deferral.
Λ-W2's four tracks each have their [verify — Linux] criteria marked discharged or failed, by name.
Λ-W4 and Λ-W5's scope is restated against the answers, with any effort band that moved called out. The audits' bands are provisional by their own statement; this is where they stop being.
Λ-W6's prerequisites (V9, V10) are answered, or Λ-W6 is explicitly blocked pending a Daniel re-ruling on Λ-D2.

Prerequisites. Λ-W2-T1, T2, T4. T3 if Λ-F2 was ruled — otherwise the panel-dependent items (V7, file-drop routing, any font check needing a rendered panel) defer to a second session and that deferral is recorded. Discharges: V1–V10 and T2 §5's seven items, as answers rather than as fixes.

Λ-W4 — Correctness and safety, repriced

Depends on: Λ-W3-T1. Three tracks, disjoint by directory. Everything here is known work whose size the sweep may have moved.

Λ-W4-T1 — `prune-deletion-safety`

Goal. Prune on Linux deletes only what it means to, tells the truth about what it reclaimed, and tells the user the deletion is permanent.

Spec: docs/product/linux-readiness.md §Λ-W4-T1; finding L2-05 (both halves) plus the symlink row of T2 §4.

Surface boundary — owns: src/shell/persist/prune_fs.cpp (the deletion authority's non-Windows branch and the reclaim scan) and the prune confirmation text wherever it is composed (shell/actions/prune_action / shell/panel/panel_bank_ops). Does not own: core/reclaim/'s orphan computation (pure, portable, unaffected), or any other persist TU.

Behavior.

The confirmation string becomes platform-aware (Λ-D5). On Linux it states the deletion is permanent and there is no Recycle Bin; on Windows it says what it says today. Same code path, one platform-dependent phrase — not a second dialog.
The dead "locked" branch is reckoned with. if (ec) return false; // real failure (locked/permission) -> skip encodes Windows file-sharing semantics; on Linux unlink of an open file succeeds, the audio keeps playing from the open fd, and the bytes are gone when it closes — so the branch never fires. Either it is documented as Windows-only in place, or the Linux path acquires an equivalent guard. What it must not do is stay silently asymmetric: the recovery floor root CLAUDE.md §"The resample bake" relies on ("the superseded file survives on disk until a prune reclaims it") otherwise has nothing under it on Linux. This half is not covered by Λ-D5's trash ruling — it is not a trash question.
The symlink hazard is fixed. fs::directory_iterator + is_regular_file() follows symlinks under C++17; size is read from the target via file_size() but fs::remove deletes the link, not the target — so prune reports N bytes reclaimed and reclaims zero. Symlinked media folders are far more idiomatic on Linux than on Windows. This is a reporting lie, not a cosmetic issue.

Acceptance criteria.

A Linux prune of a bank file currently playing behaves as recorded in Λ-W3's sweep, and the behaviour matches what the confirmation promised. [verify — Linux].
A symlinked bank file is either skipped or deleted with its target, and the reclaimed-byte figure matches what actually left the disk in both cases. Unit-testable for the computation; [verify — Linux] for the filesystem half.
The Windows path — SHFileOperationW + FOF_ALLOWUNDO, Recycle-Bin recoverable — is bit-for-bit unchanged.
Prune remains the only file-deletion path in the system (plan-wide product invariant).

Prerequisites. Λ-W3-T1 (the in-use-file check). Discharges: L2-05 both halves, and the symlink row of T2 §4.

Λ-W4-T2 — `linux-font-faces`

Goal. The kit asks for faces that exist on a stock Linux distro, so type is chosen rather than substituted.

Spec: docs/product/linux-readiness.md §Λ-W4-T2 and §"Calls made here"; finding L2-09. This is a product-designer call, not a fork: silent fontconfig substitution is not acceptable because the kit's type is part of a deliberate visual identity (docs/product/visual-design-language.md), and the palette-role discipline exists precisely so a visual direction is a single-file change rather than an emergent property of the host. The cost is five string literals. Contradict it in review with an argument.

Surface boundary — owns: src/shell/panel/draw_kit.cpp's five loadFont call sites (:154–158) and the face constants in draw_kit.h. Does not own: loadFont itself beyond the literals, the palette, any geometry, or the two WCAG static_asserts — which are on pixel height and weight, not on the face, and hold regardless.

Behavior. A platform face list at the five call sites: DejaVu Sans / DejaVu Sans Mono as the Linux defaults, following SWELL's own no-fontconfig fallback list (LiberationSans/DejaVuSans, LiberationMono/DejaVuSansMono) as precedent. One code path, shared with macOS's eventual San Francisco/Menlo (Λ-D4: made in shared form, not verified). The subtlety to carry into the work: draw_kit.cpp:74's if (!hf) return guard does not catch this failure mode — SWELL's CreateFont always returns a non-null handle even when the face never resolved, recording the failure as a null typedata internally. A wrong or missing face is not observable at the call site, only in the rendering.

Acceptance criteria.

Every kit string renders in the intended face on a stock distro, and the numeric readouts are tabular. [verify — Linux].
Windows renders Segoe UI and Consolas exactly as today.
Row heights, ellipsis points and label truncation are unchanged on Windows; on Linux they are measured rather than assumed correct.

Prerequisites. Λ-W3-T1's fontconfig answer (T2 §5 item 5), which decides whether this is cosmetic or a readability regression. Discharges: L2-09.

Λ-W4-T3 — `source-partition-and-invariants`

Goal. The build's source list stops relying on every TU's own #ifdef discipline, and the invariants Linux weakens are stated where a reviewer will read them.

Spec: docs/product/linux-readiness.md §Λ-W4-T3 and §Λ-F3; findings Λ-06, L2-10, L2-11.

Surface boundary — owns: the target_sources list in src/app/CMakeLists.txt:8–55 (the list; the property blocks are Λ-W2-T2's), any new platform-sibling TU the sweep showed was needed, src/shell/actions/drag_out_win.h's invariant comment, and the corresponding src/shell/**/CLAUDE.md invariant passages. Does not own: any behaviour change in a shipped code path.

Behavior.

Λ-06 — partition the source list where the Λ-W3 diagnostic set says a TU needs it. drag_out_win.cpp is the model (a real #ifdef _WIN32 / #else split); arrange_drop_win.cpp and instrument_drop_win.cpp are _win-suffixed for the surface they serve, not for a platform dependency, and the audits found them portable by inspection — confirm against the actual compile rather than re-inspecting.
L2-10 — the copy-only invariant. Λ-F3 rules the wording; this track makes the edit either way. Make drag_out_win.h:7–11 the doc a Linux reviewer is pointed at, and treat "MOVE is structurally impossible" as a Windows-scoped claim: SWELL's file-list drag takes no effect mask, so nothing at the API level forbids a target from treating the drag as a move.
L2-11 — no Linux action. If the predicate is touched at all it becomes "case-insensitive filesystem", not "Windows" — but Λ-D4 puts macOS out, so the right move is a comment recording the known macOS defect, not a speculative fix.

Acceptance criteria.

No TU compiles on Linux only because of an #ifdef that happens to be complete; every platform-specific TU is either partitioned in CMake or carries a deliberate, commented guard.
The copy-only invariant's text says the same thing in drag_out_win.h, the owning CLAUDE.md, and any spec text that cites it.
Zero behaviour change on Windows.

Prerequisites. Λ-W3-T1. Λ-F3 for the L2-10 wording only — non-gating: the track can land the partition and leave the sentence for a follow-up. Discharges: Λ-06, L2-10, L2-11's Linux half.

Λ-W5 — Ship the extension

Depends on: Λ-W3-T1 (V4) and all three Λ-W4 tracks — shipping means the correctness fixes are in. One track. Gated on Λ-F4 (a shipped artifact has to say what it runs on).

Λ-W5-T1 — `linux-packaging-and-install`

Goal. A Linux user can install a correctly-built reaper_reasampler.so by following a document, and a pipeline can install it by following a rule.

Spec: docs/product/linux-readiness.md §Λ-W5-T1; finding Λ-08 plus Λ-02's shipped half.

Surface boundary — owns: an install() rule in src/app/CMakeLists.txt — the first in the tree — README.md's platform-support and install sections, root CLAUDE.md §"Install / reload", and docs/product/versioning-and-release.md's artifact and pipeline paragraphs. Does not own: any source file, the toolchain properties (Λ-W2-T2's), or CI (Λ-F1).

Behavior.

Document the Linux UserPlugins/ root as V4 actually found it, and the single-config-generator output path (build/reaper_reasampler.so) that no doc currently names.
Add the install() rule for both channels. The channel fork is platform-independent by construction — REASAMPLER_CHANNEL threads through configure_file into names only — so reaper_reasampler_beta.so needs no separate mechanism, only a separate destination check.
Amend versioning-and-release.md, which already promises three platform artifacts per channel per release and mentions no Linux install path, no signing and no CI. Λ-D4 removes macOS from the near-term promise: that document should say two platform artifacts per channel for now, with macOS named as deferred rather than silently dropped.
The beta channel on Linux is uncosted in both audits. Almost certainly free — the fork is name-only — but "almost certainly" is not a ship criterion. Build and install both channels side by side once.
Λ-F1 decides only which paragraph gets written here — a pipeline paragraph, or an explicit "deferred to dev-ops". Until it is ruled, Λ ships nothing that presumes a runner.

Acceptance criteria.

A clean-machine walkthrough following only the README: clone, narrow submodule init, configure, build, install, restart REAPER, actions present, panel docks. [verify — Linux].
reaper_reasampler.so and reaper_reasampler_beta.so coexist in one REAPER with separate ext-state namespaces, command ids and dock idents. [verify — Linux].
The installed binary shows an explicit -O flag in its build log — Λ-02's criterion, re-checked on the artifact that actually ships.
versioning-and-release.md no longer promises an artifact this phase does not produce.
The declared support floor (Λ-F4) appears in the README and matches what was built.

Prerequisites. Λ-W3-T1 (V4), Λ-W4 (all three tracks), Λ-F4 ruled. Discharges: Λ-08, and Λ-02's shipped half.

Λ-W6 — The instrument module, and the host-safety contract

Depends on: Λ-W2-T2 (thread linkage, visibility, warnings) and Λ-W3-T1 (V10, plus V9 if Λ-D2 is to survive). Λ-W6 may run CONCURRENTLY with Λ-W4 and Λ-W5 — it touches src/shell/instrument/ and that directory's CMake and CLAUDE.md files plus src/core/instrument/CLAUDE.md, none of which Λ-W4 or Λ-W5 opens; the only reason to serialise is attention, not contention.

Two tracks — one build + docs, one source — and they are T1 before T2 — serial, the same shape this plan already records for Γ-W3. They are file-disjoint but not order-free: there must be a module before it can refuse to show a view.

At the end of this wave the Linux instrument loads in any host, processes audio, and has NO EDITOR AT ALL — a defined, verifiable, shippable state, not a half-done one.

Λ-W6-T1 — `vst-linux-module`

Goal. reasampler_9000.vst3 configures, builds and installs on Linux as the directory bundle a Linux host expects, and the decision that forbade it is reversed in writing.

Spec: docs/product/linux-readiness.md §Λ-W6-T1; audit findings B1, B2, B5.

Surface boundary — owns: src/shell/instrument/CMakeLists.txt (the gate, the entry-point source selection, the bundle POST_BUILD and install rule, SWELL_PROVIDED_BY_APP, the modstub TU) and the three D5 passages in src/core/instrument/CLAUDE.md, src/shell/instrument/CLAUDE.md and src/shell/panel/CLAUDE.md. Does not own: any .cpp or .h under shell/instrument/.

Behavior.

B5 first, as a documentation act. Rewrite the three D5 passages: the platform clause becomes "Windows and Linux; the editor is REAPER-hosted"; VST3-only and REAPER-only survive verbatim. src/core/instrument/CLAUDE.md carries it twice (Invariants and Non-goals), src/shell/instrument/CLAUDE.md once (Non-goals), and src/shell/panel/CLAUDE.md once (the font/GDI clause). Nothing else in this wave may land before this does — the invariant files are what a future implementer reads.
B1 — swap public.sdk/source/main/dllmain.cpp for linuxmain.cpp on Linux. dllmain includes <windows.h> with no SMTG_OS_* guard; linuxmain.cpp exports ModuleEntry and ModuleExit, both mandatory — the SDK's own loader refuses the module without either. Both files are already vendored; this is a source swap plus a platform if().
Split the WIN32 AND EXISTS conjunction at src/shell/instrument/CMakeLists.txt:9. Today it is a conjunction, so a Linux configure silently omits reasampler_vst even with the submodule slice fully initialised. The EXISTS half stays — a fresh clone with no VST3 slice must still configure — and the WIN32 half becomes a Windows-or-Linux predicate.
B2 — the artifact becomes a directory bundle: reasampler_9000.vst3/Contents/<uname -m>-linux/reasampler_9000.so, per V10's answer and Λ-F4's floor. Contents/Resources/moduleinfo.json is optional — the SDK's getModuleInfoPath returns empty when absent rather than failing — so do not author one. Install roots: $HOME/.vst3/, /usr/lib/vst3/, /usr/local/lib/vst3/, $APPFOLDER/vst3/.
SWELL_PROVIDED_BY_APP + the modstub TU are added to this target in the default (non-SWELL_LOAD_SWELL_DYLIB) branch — the same branch the extension already uses (src/app/CMakeLists.txt:103–104). The whole modstub file is inside #ifdef SWELL_PROVIDED_BY_APP, so the VST3 target must define that symbol; today it does not. The dlopen itself is Λ-W7's; what this track lands is the compiled-in, inert table plus the exported SWELL_dllMain.
The channel fork applies: reasampler_9000_beta.vst3 with its own class UID. The UID pair is FOREVER-FROZEN and must not change — a Linux build is a new platform, not a new identity, and a saved project rebinds by UID.

Acceptance criteria.

A Linux configure produces the reasampler_vst target; a Windows configure is unchanged.
The built bundle's directory shape matches what the SDK's module_linux.cpp opens, and the SDK's own validator loads it. [verify — Linux].
Both channels build and install side by side, and the two class UIDs are byte-identical to the Windows build's.
The three CLAUDE.md files no longer claim Windows-only, and still claim VST3-only and REAPER-only.
No VST3 parameter is registered by this track or any other in this phase — see the Γ-W4-T1 boundary above.

Prerequisites. Λ-W2-T2, Λ-W3-T1 (V10; V9 if Λ-D2 is to survive). Discharges: B1, B2, B5; and Λ-10's "vst3sdk is optional on Linux" caveat becomes conditional.

Λ-W6-T2 — `vst-host-safety-contract`

Goal. The plugin's editor surface refuses cleanly on every Linux host, so that adding a real editor later is a change of branch taken and not a change of contract.

Spec: docs/product/linux-readiness.md §Λ-W6-T2 and §"The non-REAPER-host safety criterion"; Λ-D3, L2-08's fallback half.

Surface boundary — owns: src/shell/instrument/editor_platform.cpp (the isPlatformTypeSupported / createView decision and the non-Windows stubs), reasampler_processor.cpp's createView site, reasampler_embed.cpp's REAPER_FXEMBED_WM_IS_SUPPORTED, and a new availability-probe seam under shell/instrument/. Does not own: any CMake file, the paint or input families (untouched — they stay whole-region-guarded), or any pure core/instrument/ module.

Behavior.

The editor's availability becomes a tri-state probe — untried / available / unavailable — computed once, lazily, off the audio thread. In this wave the Linux answer is unconditionally unavailable; Λ-W7 gives it a real computation without changing a single call site.
isPlatformTypeSupported returns kResultFalse for every type when unavailable; createView(kEditor) returns nullptr. Never a view that fails to attach.
One diagnostic line per process, naming the reason. Never a modal.
reasampler_embed's REAPER_FXEMBED_WM_IS_SUPPORTED continues to return 0 off Windows. That is correct and stays correct — the TCP/MCP embed strip on Linux is an explicit non-goal of this phase.
The Windows path is not restructured to accommodate this. The probe is a Linux branch on an existing decision, not a new abstraction over both.

Acceptance criteria. The full observable contract above, verified by all four of its checks: validator with no libSwell.so present; a real Ardour or Bitwig scan; a REAPER-on-Linux load; and the renamed-libSwell.so negative control. [verify — Linux]. Plus:

Windows editor behaviour bit-for-bit unchanged — same window class, same wndProc, same CS_DBLCLKS fall-through.
Nothing added to process() — no dlopen, no probe, no branch on the per-voice-per-sample path.
The criteria pass with ZERO VST3 parameters registered. An empty generic UI is a pass; Γ-W4-T1 improves it and Λ must not.

Prerequisites. Λ-W6-T1 (there must be a module to load). Discharges: Λ-D3's Λ-W6 half; L2-08's fallback half.

Λ-W7 — The SWELL bootstrap

Depends on: Λ-W6-T1, Λ-W6-T2, and V9 answered affirmatively. If V9 is negative, this track does not exist and Λ-D2 needs a re-ruling — which is why V9 runs first in Λ-W3 rather than being discovered here.

Λ-W7-T1 — `swell-dylib-bootstrap`

Goal. The plugin acquires a working SWELL function table under REAPER on Linux, without the vendored stub's exit() behaviour and without vendoring SWELL.

Spec: docs/product/linux-readiness.md §Λ-W7-T1 and §"The implementation shape this obliges"; Λ-D2 (route B3a), audit finding B3.

Surface boundary — owns: a new src/shell/instrument/swell_bootstrap.{h,cpp}, the availability-probe computation Λ-W6-T2 left stubbed, and the SWELLAppMain-shaped callback. Does not own: any vendored file (nothing under vendor/ is patched), the CMake source list beyond adding one TU, or the editor.

Behavior — exactly the four-point shape in the product doc, and it is not a re-litigation of Λ-D2 but the specification of it.

Never define SWELL_LOAD_SWELL_DYLIB. Compile swell-modstub-generic.cpp in its default branch, which exports SWELL_dllMain(hInst, callMode, GetFunc) and calls doinit on the pointer it is handed.
Own the load. Resolve the host executable's directory, dlopen libSwell.so, dlsym SWELLAPI_GetFunc, dlsym and call SWELL_set_app_main, then call our own exported SWELL_dllMain(hinst, DLL_PROCESS_ATTACH, getfunc) — using only exported surface, with every failure returning a recorded state instead of exiting. This also dissolves the SWELLAppMain-as-a-link-requirement noted in T1 B3a: we pass an app-main because we choose to, not because the linker demands one. [verify — Linux] whether a minimal app-main suffices for a plugin that only ever creates child windows inside a host-supplied X11 window.
Probe the host, not just the library. A non-REAPER host has no SWELL message loop — REAPER's own is what pumps SWELL windows — so even a successful dlopen in Ardour would produce a window nothing drives. Gate on the host name via IHostApplication::getName() AND on the dlopen succeeding; either failing means no editor.
Probe once, lazily, off the audio thread. Tri-state, computed on first createView and never recomputed. No dlopen from process(), no per-createView retry, no static-constructor work.

The failure taxonomy the probe must distinguish, because they need different messages: host is not REAPER / executable path unresolvable / libSwell.so not present at the resolved path / SWELLAPI_GetFunc missing or version-mismatched (the stub checks SWELLAPI_GetFunc(NULL)==(void*)0x100) / API table incomplete. The last is not fatal — doinit substitutes a zero-returning dummyFunc per miss — and whether to accept a partial table or refuse is [propose at review], with "refuse if any name the editor actually calls is missing" as the starting proposal.

Acceptance criteria.

Under REAPER on Linux the probe reports available and the SWELL table resolves with zero misses. [verify — Linux].
Under validator with no libSwell.so anywhere, the probe reports unavailable, the process exits normally, and one diagnostic line is printed. This is the direct negation of the exit(2) finding and is the track's headline criterion. [verify — Linux].
Under Ardour or Bitwig with a libSwell.so reachable, the host-name gate still refuses — proving the gate is on the host, not only on the library. [verify — Linux].
No vendored file is modified; git status under vendor/ is clean.
Windows build unaffected — the whole TU is behind a platform guard.

Prerequisites. Λ-W6-T1, Λ-W6-T2, V9 affirmative. Discharges: B3 via route B3a; Λ-D3's runtime half.

Λ-W8 — The X11 editor

Depends on: Λ-W7-T1. One track, and it is the phase's only L-band source item (L2-08; T1 B4 costs it "build S, source L"). Λ-D6 sequences it last on purpose: halting this wave still leaves a shipped extension and a loading, processing, generic-UI instrument — a real product, not a stub.

Λ-W8-T1 — `x11-embed-view`

Goal. The ReaSampler 9000 editor opens, draws and responds under REAPER on Linux.

Spec: docs/product/linux-readiness.md §Λ-W8-T1; audit findings B4, L2-08.

Surface boundary — owns: a Linux sibling to src/shell/instrument/editor_platform.cpp (window creation and parenting, the run-loop timer, the event-driven input path), and the #ifdef _WIN32 region boundaries in reasampler_editor.h and the eight editor_input_* / editor_paint* TUs — boundaries only, not their contents. Does not own: draw_kit, any pure core/instrument/ module, any painter's drawing logic, instrument_bake, or the processor.

Behavior. The audits call this a new competence rather than a port. The build-side cost is nil — the Linux IIDs are already in the vendored slice (commoniids.cpp defines Linux::IEventHandler, Linux::ITimerHandler, Linux::IRunLoop under #if SMTG_OS_LINUX, and that file is already in the vst3_sdk source list). What must be written:

kPlatformTypeX11EmbedWindowID instead of kPlatformTypeHWND; attachedToParent receiving an X11 window id.
A Linux::IRunLoop-driven timer replacing SetTimer/WM_TIMER — including the editor's sync tick, which the bake's arm-then-run discipline rides on.
An event-driven input path replacing the wndProc switch. RegisterClassW / CreateWindowExW / DefWindowProcW have no SWELL analogue at all — SWELL has no window-class model, only SWELL_CreateDialog and raw HWND__ construction.
Substitutions the audit already resolved by name: MoveWindow → SetWindowPos; GetWindowLongPtr/SetWindowLongPtr → the non-Ptr forms returning LONG_PTR; GetKeyState → GetAsyncKeyState; TrackMouseEvent/WM_MOUSELEAVE → nothing, so hover-leave needs its own derivation (the panel layer already documents the same gap); DragAcceptFiles/DragQueryFileW → the drop path Λ-W2-T3 settled for the panel.

A worked reference implementation is already on disk and neither audit named it. vendor/vst3sdk/public.sdk/samples/vst-hosting/editorhost/source/platform/linux/ contains window.cpp (returning {kPlatformTypeX11EmbedWindowID, …} and answering Linux::IRunLoop::iid from queryInterface), runloop.cpp, and irunloopimpl.h (a RunLoopImpl implementing registerEventHandler / registerTimer and their unregisters). It is the host side of the contract rather than the plug-in side, which makes it a precise specification of what our plug-in side must satisfy, and the documented narrow submodule init already pulls it. This does not shrink the L band — it is a reading input, not a library; it removes the "we are guessing at the contract" risk from the estimate.

Acceptance criteria.

The editor opens, draws every face identically to the Windows build (compare screenshots at the same window size), and every drag, click, wheel and keyboard interaction behaves the same. [verify — Linux].
Hover-leave is correct on every hover surface, without TrackMouseEvent.
The bake's arm-then-run tick fires under IRunLoop, and a bake completes end-to-end on Linux: staged file, extension action invoked over the VST3 host bridge, outcome read back, adopt and reset. [verify — Linux].
Λ-W6-T2's contract still holds — a non-REAPER host still gets nullptr from createView. Re-run all four checks; this is a regression criterion, not a new one.
Nothing added to process(); no dispatch added to any per-sample path.
Every new file lands under the ~600-line ceiling with a responsibility seam, not a bisection. The editor's existing band-axis split (_chrome / _waveform / _deck / _browse / _curve) is the seam vocabulary to reuse — the Linux platform TU is a sibling to editor_platform, per L2-08's own direction: "it needs a sibling, not a rewrite."
Windows editor behaviour bit-for-bit unchanged.

Prerequisites. Λ-W7-T1. Discharges: B4, L2-08.

Shared files across Λ's waves, named rather than discovered at merge

All textual adjacency, not semantic contention, unless marked otherwise.

File	Tracks	Nature
`src/app/CMakeLists.txt`	Λ-W2-T2 (property + platform blocks), Λ-W2-T3 (one `target_sources` line, resgen route only), Λ-W4-T3 (the source list), Λ-W5-T1 (the `install()` rule)	Four disjoint regions of one file. Λ-W2-T2 and Λ-W2-T3 are the only pair in the same wave; one line each
`src/shell/panel/draw_kit.cpp`	Λ-W2-T1 (`loadFont`'s `CreateFont` args, `:73`), Λ-W4-T2 (the five call sites, `:154–158`)	Different waves
`src/shell/instrument/CMakeLists.txt`	Λ-W2-T2 (thread linkage), Λ-W6-T1 (gate, entry point, bundle, install), Λ-W7-T1 (one added TU)	Different waves
`src/shell/panel/panel_window.cpp`	Λ-W2-T3 alone	Deliberately not split. The L2-06 diagnostic and the Λ-01 resource route are the same function — under the id-0 route the same line. Splitting them would be semantic contention
`src/shell/instrument/editor_platform.cpp`	Λ-W6-T2 (the refusal branch), Λ-W8-T1 (the real branch)	Different waves; the second replaces the first's computation without touching its call sites

Traceability — all seventeen items

The check that nothing was dropped. Every row points at a track. All seventeen items are Θ or Ξ work, and both phases have since landed in full — their track sections are retired from this file; see docs/COMPLETED.md for each track's full narrative.

#	Item (short)	Phase-Wave-Track	Worktree slug
1	Envelope editor: radio switch, curve dials, overlay recolor	Θ-W3-T2	`pth-w3-t2-staged-envelope-curves`
2	MM preamp Filter — resonant HP/LP stage	Θ-W1-T3 (DSP) + Θ-W2-T1 (integration)	`pth-w1-t3-filter-dsp-port`, `pth-w2-t1-filter-voice-path`
3	Alternative Spline EGs	Θ-W5-T1	`pth-w5-t1-spline-egs`
4	Bug: end-of-sample click, Trigger × Preserve	Θ-W3-T2	`pth-w3-t2-staged-envelope-curves`
5	Bug: drag-out sometimes lands without audio	Θ-W1-T2	`pth-w1-t2-capture-handoff-bugs`
6	Bug: FX-container drop loses the capture	Θ-W1-T2	`pth-w1-t2-capture-handoff-bugs`
7	Stereo waveform shows both channels	Θ-W2-T2	`pth-w2-t2-stereo-waveform-lanes`
8	Release anchoring; the Pitch AD becomes AHD	Θ-W3-T2	`pth-w3-t2-staged-envelope-curves`
9	Loop points — regression + Gate loop-sustain	Θ-W4-T1	`pth-w4-t1-gate-loop-sustain`
10	Knob/label sizing, ms units, double-click reset	Θ-W6-T1	`pth-w6-t1-legibility-and-antialiasing`
11	Preview glyph; VELOCITY deck; bipolar curves	Θ-W4-T2	`pth-w4-t2-velocity-deck-and-bipolar-curves`
12	Toolbar cleanup; full-width piano strip; tooltips	Θ-W2-T3	`pth-w2-t3-toolbar-and-piano-strip`
13	Antialiased rendering audit for high-DPI	Θ-W6-T1	`pth-w6-t1-legibility-and-antialiasing`
14	Trigger amp/filter fade → AHD consolidation	Θ-W3-T2	`pth-w3-t2-staged-envelope-curves`
15	One-click in-sampler resample	Ξ-W1-T2 (note model) + Ξ-W2-T1 (bake chain) + Ξ-W3-T1 (popup abandoned by ruling; window derives itself)	`pxi-w1-t2-note-program-model`, `pxi-w2-t1-resample-bake-chain`, `pxi-w3-t1-capture-signal-popup`
16	Retire the zone mapping system	Θ-W1-T1	`pth-w1-t1-zone-retirement`
17	Consolidate provenance/usage tracking	Ξ-W1-T1	`pxi-w1-t1-tracking-consolidation`

Work in this plan that is not one of the seventeen

The table above is a completeness proof over TODO-1.0.md — every row points at a track, so nothing from the source was dropped. It is deliberately not an index of the plan: work that did not come from the source doc has no row, and inventing one would weaken the proof it exists to give.

Θ-W3-T1 — live-parameter-delivery (pth-w3-t1-live-parameter-delivery). Arose from Θ-W2-T1's implementation review, not from TODO-1.0.md. The first such track in this plan; see Θ-W7-T1 below for the second.
Θ-W7-T1 — arc-and-spline-aa (pth-w7-t1-arc-and-spline-aa). Opened after Θ-W6-T1 shipped, when Daniel found two rendering defects by eye in the editor — not from TODO-1.0.md, and not a track this plan originally scoped. The second such track in this plan today; if others appear, they belong on this list rather than in the table.
All of Phase Γ (pg-*). Thirteen tracks across four waves (W1 seven, W2 two, W3 three, W4 one), from a direct interview with Daniel (2026-08-01) and his four later rulings the same day, not from TODO-1.0.md. Listed here as a block rather than per track, because the whole phase is outside the source doc; the product reasoning lives in docs/product/instrument-control-surface.md and the parameter system's in docs/product/parameter-automation.md §§6–10. Two docs/TODO.md entries are discharged by this phase, not deferred again: Γ-W3-T1 discharges the deck-rework entry (whose original "one row of taller decks with within-deck stacking" shape Daniel explicitly superseded), and Γ-W1-T1 discharges "Raise the stage-time ceiling above 2 s" (Γ-F3 reversed).
All of Phase Ψ (ppsi-*). Seven tracks across three waves, from a direct list of seven defects and refinements (Daniel, 2026-08-01), not from TODO-1.0.md. Listed here as a block, like Γ; unlike Γ it has no backing product doc — the seven are recorded verbatim in the phase header as its provenance (Ψ.1–Ψ.7). Phase Ψ has since landed in full and its PLAN.md section is retired; the design content and the Ψ.1–Ψ.7 list now live in docs/COMPLETED.md. The seventh track, Ψ-W3-T1, is not one of the seven defects/refinements itself — it came from a review finding mid-phase; see docs/COMPLETED.md for detail.
Γ-W3-T2 bake-reset-amendment is a CORRECTION, not a feature, and belongs on this list for a different reason from the others: it exists only because Ξ-W2-T1 shipped ahead of this plan's sequencing claim. If more corrections of this shape appear, they belong here rather than in the table — the table is a completeness proof over TODO-1.0.md, and a correction has no source row to point at.
Γ-W3-T3 bake-prints-limiter is also a CORRECTION, not a feature, and for the same reason as T2: it exists only because T2's own finding disproved the premise §3.4's reset classification rested on. Unlike the twelve above, it does not come from the 2026-08-01 interview or that day's four rulings — it is a separate ruling, one day later (2026-08-02), opened after T2 landed and found the gap.
All of Phase Ε (pe-*). Six tracks across three waves, from a direct request (Daniel, 2026-08-02), not from TODO-1.0.md. Listed here as a block, like Γ and Ψ; the product reasoning lives in docs/product/bank-package.md. It supersedes nothing — neither docs/TODO.md nor docs/TODO-1.0.md records export, import, or a package format, so there is no deferred entry to absorb or contradict. Its three [Daniel]-class forks (Ε-F1/F2/F3) were opened and ruled the same day it was framed, so no track here is gated on a decision; see "Decision state" above.
All of Phase Ρ (pr-*). One track in one wave, from a direct request (Daniel, 2026-08-02), not from TODO-1.0.md; the product reasoning lives in docs/product/render-in-place.md. It supersedes nothing — a sweep of docs/TODO.md and docs/TODO-1.0.md for render.in.place|render to new track|preserve.source returns nothing. The smallest phase in this plan, deliberately: it is a thin third verb composed out of machinery that already exists, and the burden was on any new machinery to prove it unavoidable. Its three [Daniel]-class forks (Ρ-F1/F2/F3) were opened and ruled the same day it was framed, so the track here is not gated on a decision; see "Decision state" above. Ρ-F2 was the one that moved the spec — the result track goes to Arrange unconditionally rather than following the active mode, which is also the only reason the phase touches panel_input.cpp at all. Ρ-W1-T1 has landed; see docs/COMPLETED.md for the full narrative.
All of Phase Λ (pl-*). Thirteen pending tracks across seven waves (Λ-W2…Λ-W8), plus Λ-W1's two audit tracks, which are landed. From a direct request (Daniel, 2026-08-02), not from TODO-1.0.md; the product reasoning lives in docs/product/linux-readiness.md and the evidence in the two audit notes it cites. It supersedes nothing and corrects one standing promise rather than inheriting it: docs/product/versioning-and-release.md commits to three platform artifacts per channel per release, and Λ-D4 (macOS out) makes that two for now, with macOS named as deferred. Λ is the one phase in this plan with unanswered [Daniel]-class questions — four forks, none ruled, of which only Λ-F2 gates a dispatch and only Λ-F4 gates a wave; see "Decision state" above. It is also the one phase whose acceptance criteria cannot be checked from the current box at all, which is why Λ-W3 exists as a wave rather than as a checklist at the end.

Deliberate compressions

Recorded so a reader of TODO-1.0.md can see what this plan did to the source, rather than discovering it later:

Item 2 is split across two waves. The DSP port (Θ-W1-T3) is deliberately separated from the integration (Θ-W2-T1) so the external-input dependency on Daniel's Cortex-M4 code sits on a standalone, disjoint track instead of blocking a wave. Item 2's acceptance criteria are split accordingly — the range/resonance assertions land in W1-T3's tests, the audible/pipeline/deck criteria in W2-T1.
Item 2's filter envelope ships twice. W2-T1 ships it in the existing staged AHDSR shape; W3-T2 gives it the curve treatment and the mode-driven Gate→AHDSR / Trigger→AHD shape. This is deliberate: waiting would put the filter behind the whole envelope system.
Item 4 lands in Θ-W3, not Θ-W1. Its fix region is the region item 14 retires, and the only earlier instrument-side track owns the entire engine. Its acceptance gate is stated as the post-consolidation gate. It is not gated behind the whole editor chain — three waves of six — and the source doc itself requires re-verification under the surviving mechanism either way.
Item 11's filter velocity curve is split from item 2's filter velocity modulation. W2-T1 wires the modulation path (following the amp/pitch precedents); W4-T2 sets the curve's bipolar domain and default and homes its button. Neither track can do the other's half.
Item 15's undo/recovery is carried as a note, not a criterion — Daniel set it at exactly "a plus." The guaranteed recovery floor (the superseded file surviving until prune) is a criterion.
Nothing else was compressed. Every other item's behavior bullets and acceptance criteria are carried at full strength into the track that owns it.

Outline at a glance

Phase Θ — ReaSampler 9000: one parameter set, filter, shapeable envelopes, legible editor
  [LANDED — all seven waves (W1-W7); see docs/COMPLETED.md; full detail section removed from this file]
  W1  Collapse and re-seam
      T1 zone-retirement ......................... 16
      T2 capture-handoff-bugs .................... 5, 6
      T3 filter-dsp-port ......................... 2 (DSP)      [needs Daniel's M4 code]
  W2  Filter in the voice path; waveform and chrome bands
      T1 filter-voice-path ....................... 2 (integration)
      T2 stereo-waveform-lanes ................... 7
      T3 toolbar-and-piano-strip ................. 12
  W3  Live parameters, then the staged envelope system      [T1 before T2 — serial]
      T1 live-parameter-delivery ................. (not one of the seventeen)
      T2 staged-envelope-curves .................. 1, 8, 14, 4
  W4  Loop sustain and the velocity deck
      T1 gate-loop-sustain ....................... 9
      T2 velocity-deck-and-bipolar-curves ........ 11
  W5  Spline EGs
      T1 spline-egs .............................. 3
  W6  Editor legibility pass
      T1 legibility-and-antialiasing ............. 10, 13
  W7  Arc-and-spline antialiasing fix
      T1 arc-and-spline-aa ....................... (not one of the seventeen)

Phase Ξ — The resample loop            (W1 concurrency-safe with Θ from Θ-W2 onward)
  [LANDED — all three waves (W1-W3); see docs/COMPLETED.md; full detail section removed from this file]
  W1  Consolidated tracking, and the programmed-note model
      T1 tracking-consolidation .................. 17
      T2 note-program-model ...................... 15 (model)
  W2  The bake chain            [ran AHEAD of Γ; its reset list is corrected by Γ-W3-T2]
      T1 resample-bake-chain ..................... 15 (chain)
  W3  The capture-signal popup      [popup abandoned by ruling; bake window derives itself]
      T1 capture-signal-popup .................... 15 (popup abandoned; window derives)

Phase Γ — The instrument's control surface      (none of the seventeen; ends with VST3 params)
  [LANDED — all four waves (W1-W4); see docs/COMPLETED.md; full detail section removed from this file]
  W1  Foundations — landed                   [seven tracks, disjoint by surface]
      T1 knob-interaction-law ....... modifiers + ONE taper module + reset bypass
                                      + 10 s ceiling + AHDSR schematic axis   [Ruling 2]
      T2 master-bus-audio ........... limiter + meter ballistics + dynamic PDC [rung 1]
      T3 contour-trace-curves ....... staged traces draw curved, knot on its trace
      T4 editor-floor-and-row-law ... floor 1190x680 (W3-T1: 1198) + budget constants + row predicate
      T5 preserve-time-stretch ...... real stretcher      [measure-and-report gate]
      T6 exhaustive-switch gate on pure libraries ... /we4062, -Werror=switch on
                                      pure libraries   [no PLAN entry — see COMPLETED.md]
      T7 psola-preserve ............. PSOLA-aligned splice jump; period_detect
                                      [cadence closure — see COMPLETED.md]
  W2  New controls, and the overlay's marks — landed  [2 tracks]
      T1 pitch-rate-deck ............ Rate + Pitch, Varisp/Presrv compounding  [rung 2]
      T2 loop-crossfade-ux .......... four-mark grammar; fade painted where it is heard
  W3  The reflow, and the bake correction — landed    [3 tracks]
      T1 deck-reflow ................ two rows + double-height MASTER, by construction
      T2 bake-reset-amendment ....... the Xi correction Gamma owns
      T3 bake-prints-limiter ........ landed — bake prints the limiter through
                                      the master stage
  W4  VST3 parameters — landed               [1 track]
      T1 vst3-parameter-set ......... 44 derived params, frozen id table     [Ruling 1]
                                      [rung 3 RESERVED, unspent]
                                      [Gamma-F7 RULED: signal flow order]

  Resequenced 2026-08-01, three times: the reflow split canvas (W1-T4) from arrangement
  (W3-T1); preserve-time-stretch moved W4 -> W1-T5, retiring Rate's interim stand-in; then
  Ruling 1 added W4 and Ruling 2 grew W1-T1.
  Payload rungs are RELATIVE, not absolute. Both are spent — kParamsPayloadVersion == 15
  (Γ-W1-T2, landed, above) and v16 (Γ-W2-T1, stated there) — and the third remains RESERVED
  as v17, unspent: Γ-W4-T1's storage verification did not force it.
  Shared files, named: engine/CMakeLists.txt (W1-T2 | W1-T5), ui/CMakeLists.txt
  (W1-T1 | W1-T3), editor_session.cpp (W2-T1 | W2-T2) — all textual adjacency, not
  semantic contention. W3-T2's disjointness from W3-T1, once a CONDITIONAL risk to confirm
  against what Xi-W2-T1 shipped, is resolved: both tracks landed — see docs/COMPLETED.md.

Phase Psi — The extension trust pass          (none of the seventeen; a direct list of seven)
  [LANDED — all three waves (W1-W3); see docs/COMPLETED.md; full detail section removed from this file]
  W1  Exact bounds, disciplined switches, reachable actions, resolved drops  [4 tracks]
      T1 capture-range-exactness ..... Psi.7   [opens with a DAW repro matrix]
      T2 mode-switch-discipline ...... Psi.2 + Psi.3   [one chokepoint: applyMode]
      T3 media-explorer-section ...... Psi.4   [BOTH sections; new FOREVER-STABLE id]
      T4 drop-target-resolution ...... Psi.5   [gesture law, not a patch]
  W2  Names and channels, over the settled render block   [gated on W1-T1's render block]
      T1 capture-naming .............. Psi.1   [+ the card shows the name]
      T2 mono-collapse ............... Psi.6   [lossless only; ingest excluded]

  Three invariant amendments are track deliverables: never-touch-solo (W1-T2, three
  files), the action-registration contract (W1-T3, root CLAUDE.md), channel-count-
  preserved (W2-T2, root CLAUDE.md:215).
  Shared files, named: panel_input.cpp (W1-T2 footer block | W1-T4 drag-arm block);
  capture.cpp + capture_realtime_finalize.cpp (W2-T1 naming lines | W2-T2 channel
  lines) — all textual adjacency, not semantic contention. main.cpp is W1-T3's
  exclusively.

Phase Epsilon — The bank package        (none of the seventeen; a direct request 2026-08-02)
  [LANDED — all three waves (W1-W3); see docs/COMPLETED.md; full detail section removed from this file]
  W1  The contract, the filesystem, and the ledger's new kind   [3 tracks, disjoint by dir]
      T1 package-format .............. core/package: framing + TWO version ints
                                       [E-F1 RULED: proprietary RSBK. No ZIP, no zlib]
      T2 package-fs-shell ............ shell/package: atomic write, streaming, pickers
                                       [ONE picker: REAPER GetUserFileName, mode 0/1]
      T3 import-origin-kind .......... OriginKind::PackageImport = 5, append-only
  W2  The two verbs                    [2 tracks; disjointness CONDITIONAL — see below]
      T1 bank-export ................. export_plan + verb + action; project untouched
      T2 bank-import ................. import_plan + verb + action + .rsbank drop
                                       [E-F2 RULED: always a NEW bank, auto-suffix, no
                                        merge. E-F3 RULED: REFUSE on degraded ledger]
  W3  The compatibility fixtures       [1 track]
      T1 package-compat-fixtures ..... frozen bytes prove BOTH version directions

  Version policy, both directions: older package in newer build ALWAYS imports (additive
  fields default, unknown keys skipped); newer package in older build REFUSES WHOLE with a
  three-part message (package needs / this build reads / writer semver). The gate is
  minReaderVersion <= kPackageFormatVersion — formatVersion is for the message, not the gate.
  All three E-forks were ruled 2026-08-02, the day the phase was framed: NO track here is
  gated on a decision. Import name collision = first free of seed, "seed 2", "seed 3", ...
  seed never re-parsed, fold is BankBook's own.
  Shared files, named: root CMakeLists.txt add_subdirectory list (W1-T1 | W1-T2, one
  append-only line each); main.cpp + the panel bank menu (W2-T1 | W2-T2, one registration
  line and one menu row each); bank_book.{h,cpp} is W2-T2's alone (one additive public const
  member). W1's three tracks are unconditionally disjoint; W2's two are
  textually adjacent only — serialize T2 behind T1 if zero contention is wanted.

Phase Rho — Render in place             (none of the seventeen; a direct request 2026-08-02)
  [LANDED — Ρ-W1-T1; see docs/COMPLETED.md; full detail section removed from this file]
  W1  The verb                                          [ONE track, deliberately]
      T1 render-in-place ............. render selected track -> new sibling track,
                                       item placed at the exact render position,
                                       colour + "Capture " name cloned, source -> Design,
                                       result track -> ARRANGE always. Never the bank.
                                       [R-F1 RULED: refuse multi-track, settled non-goal.
                                        R-F2 RULED: result track ALWAYS Arrange, never
                                        mode-following. R-F3 RULED: follow panel tail]

  The THIRD VERB. Capture = arrange -> bank (writes it). Placement = bank -> arrange
  (reads it). Render in place = arrange -> arrange (bank on neither side). That is why the
  load-bearing capture/placement rule survives it; the full argument is in the phase header
  and in docs/product/render-in-place.md.
  Structural boundary, not a convention: the render destination reaches the backend as a
  TWO-VALUED ENUM (Bank | ProjectMedia), never a caller-supplied path — so no Rho caller can
  name the bank folder. A renderDir string on CaptureRequest IS the drift.
  Genuinely new: ONE pure sibling-placement function (folder-parent and last-in-folder are
  both audibly wrong if inserted at srcIdx+1), an idempotent "Capture " prefix, a
  deriveRenderPaths sibling, and CaptureResult::absolutePath. Everything else composes.
  R-F2 fallout, the ruling's only cost: the result track AND its item are tagged
  kArrangeModeId explicitly, and detectNewContent must drop added GUIDs that already carry
  a membership record — the auto-tag detector otherwise re-tags a Design-fired result to
  Design on its next tick and reverses the ruling. Firing from Design is therefore
  deliberately invisible: the render waits in Arrange. No A/B-on-the-bench behaviour exists.
  Four invariant amendments are track deliverables (the Psi precedent): shell/capture and
  shell/actions CLAUDE.md placing-path claims, ONE sentence in root CLAUDE.md naming
  the third verb without softening the prohibition, and core/view CLAUDE.md's "new tracks
  are tagged to the active mode" made conditional on carrying no membership record.
  Shared files, named: capture.{h,cpp} (destination enum + result field), main.cpp (one
  ActionTableRow), and panel_input.cpp (detectNewContent only; Psi's two named regions in
  that file are landed and are other functions) — the only pre-existing shell files
  touched. Disjoint from Gamma (core+shell/instrument) and Epsilon (core+shell/package).

Phase Lambda — ReaSampler on Linux      (none of the seventeen; a direct request 2026-08-02)
  W1  The audits                                                          [COMPLETE]
      T1 build-toolchain-audit ....... L-01..L-10, V1..V10, D1..D7
      T2 source-runtime-audit ........ L2-01..L2-12

  W2  Make it buildable, and make it honest             [4 tracks, file-disjoint]
      T1 linux-compile-blockers ...... L2-01, L2-02, L2-03      -> V1, V2
      T2 toolchain-floor ............. L-02..L-05, L-07, L-09, L-10  -> V5, V6, V8
      T3 panel-dialog-resource ....... L-01, L2-06, L2-07       -> V7   [GATED: L-F2]
      T4 locale-independent-numerics . L2-04     [the one track verifiable on Windows]
  W3  First light, and the verification sweep           [1 track, deliberately]
      T1 linux-verification-sweep .... V1..V10 + T2 section 5's seven; the deliverable
                                       is a RECORD, not a fix. V1 / V9 / the API-load
                                       count run FIRST — each reprices what follows.
  W4  Correctness and safety, repriced                  [3 tracks, disjoint by dir]
      T1 prune-deletion-safety ....... L2-05 both halves + the symlink reclaim lie
      T2 linux-font-faces ............ L2-09
      T3 source-partition-and-invariants . L-06, L2-10, L2-11 (Linux half)
  W5  Ship the extension                                [1 track; GATED: L-F4]
      T1 linux-packaging-and-install . L-08 + L-02's shipped half + both channels
  W6  The instrument module + the host-safety contract  [T1 before T2 — serial]
      T1 vst-linux-module ............ B5 (the D5 reversal, FIRST), B1, B2
      T2 vst-host-safety-contract .... D3's observable contract; passes with ZERO params
  W7  The SWELL bootstrap                               [1 track]
      T1 swell-dylib-bootstrap ....... B3 via route B3a, WITHOUT the stub's exit(2)
                                       [prereq: V9 affirmative, else L-D2 re-rules]
  W8  The X11 editor                                    [1 track]
      T1 x11-embed-view .............. B4, L2-08. The phase's one L-band source item.

  NOTHING here has been verified on a Linux machine. W2's edits are authored BLIND from the
  audits' citations and their acceptance criteria are discharged in W3 — W2 is not "done"
  until W3 runs, and this plan says so rather than pretending otherwise.
  W6 may run concurrently with W4 and W5 — file-disjoint; the only reason to serialise is
  attention. Six D-rulings are SETTLED (instrument in scope; SWELL via dlopen of REAPER's
  libSwell.so; REAPER-only editor but other hosts must degrade SAFELY; macOS out; shipped
  not developer-only; hard unlink acceptable with a platform-aware confirmation).
  OPEN, none ruled: L-F1 (CI — gates nothing), L-F2 (dialog-resource route — the ONLY fork
  gating a dispatch, W2-T3), L-F3 (copy-only invariant wording — gates nothing),
  L-F4 (declared support floor — gates W5, not a dispatch).
  Lambda registers NO VST3 parameter, ever — that table is Gamma-W4-T1's and is frozen.

100 KiB Raw Blame History Unescape Escape

PLAN

What this doc is, and how it relates to the others

Decision state

Flagged for awareness — not blocking, but decision-grade

Phase-wide acceptance criteria

Structural (root CLAUDE.md, Daniel 2026-07-28)

Performance guardrails

Product invariants

Phase Λ — ReaSampler on Linux: both artifacts, shipped

Rulings — Daniel's, 2026-08-02. Six, settled.

Open forks — four, NONE ruled

Phase-Λ acceptance criteria

The non-REAPER-host safety contract

Cross-phase boundary — Γ-W4-T1, and the frozen parameter table

Λ-W1 — The audits (complete)

Λ-W2 — Make it buildable, and make it honest

Λ-W2-T1 — linux-compile-blockers

Λ-W2-T2 — toolchain-floor

Λ-W2-T3 — panel-dialog-resource (GATED on Λ-F2 — do not dispatch until it is ruled)

Λ-W2-T4 — locale-independent-numerics

Λ-W3 — First light, and the verification sweep

Λ-W3-T1 — linux-verification-sweep

Λ-W4 — Correctness and safety, repriced

Λ-W4-T1 — prune-deletion-safety

Λ-W4-T2 — linux-font-faces

Λ-W4-T3 — source-partition-and-invariants

Λ-W5 — Ship the extension

Λ-W5-T1 — linux-packaging-and-install

Λ-W6 — The instrument module, and the host-safety contract

Λ-W6-T1 — vst-linux-module

Λ-W6-T2 — vst-host-safety-contract

Λ-W7 — The SWELL bootstrap

Λ-W7-T1 — swell-dylib-bootstrap

Λ-W8 — The X11 editor

Λ-W8-T1 — x11-embed-view

Shared files across Λ's waves, named rather than discovered at merge

Traceability — all seventeen items

Work in this plan that is not one of the seventeen

Deliberate compressions

Outline at a glance

100 KiB

Raw Blame History

Structural (root `CLAUDE.md`, Daniel 2026-07-28)

Λ-W2-T1 — `linux-compile-blockers`

Λ-W2-T2 — `toolchain-floor`

Λ-W2-T3 — `panel-dialog-resource` (GATED on Λ-F2 — do not dispatch until it is ruled)

Λ-W2-T4 — `locale-independent-numerics`

Λ-W3-T1 — `linux-verification-sweep`

Λ-W4-T1 — `prune-deletion-safety`

Λ-W4-T2 — `linux-font-faces`

Λ-W4-T3 — `source-partition-and-invariants`

Λ-W5-T1 — `linux-packaging-and-install`

Λ-W6-T1 — `vst-linux-module`

Λ-W6-T2 — `vst-host-safety-contract`

Λ-W7-T1 — `swell-dylib-bootstrap`

Λ-W8-T1 — `x11-embed-view`