diff --git a/.changeset/dd017-phase1-expr-params.md b/.changeset/dd017-phase1-expr-params.md
deleted file mode 100644
index c1349281..00000000
--- a/.changeset/dd017-phase1-expr-params.md
+++ /dev/null
@@ -1,28 +0,0 @@
----
-"@chestnutlabs/gcode-parser": minor
----
-
-feat(parser): RS274NGC parameters + expressions (DD-017 Phase 1, #189 phase 7)
-
-The parser now understands the RS274NGC *programming* layer that FDM slicers never use but CAM /
-LinuxCNC output routinely does: numbered/named/global parameters (`#100`, `#<name>`, `#<_global>`),
-assignment (`#n = <expr>`), and bracket expressions (`[ … ]`) usable wherever a numeric word value is
-expected (`X[#1+2]`, `F[#feed]`, `Z#<depth>`). Previously these were silently dropped, so parametric
-programs rendered honest-but-**empty**; they now resolve to real geometry.
-
-A new self-contained module (`rs274.ts`) provides a pure recursive-descent evaluator — the RS274NGC
-operator + function set with correct precedence (`**` > `*/MOD` > `+-` > comparisons > logical),
-**degree**-based trig, LinuxCNC `MOD`/`EQ` semantics, `FIX`/`FUP`/`ROUND`, indirect `##n` and computed
-`#[expr]` references, and a read-only system-parameter allow-list (`#5420–#5422` = current position).
-It is bounded and safe: a depth guard on nested brackets, **no `eval`/`Function`**, and a capped
-parameter store, so a hostile program can waste only bounded CPU. Malformed input never throws out of
-the parse — the offending word is dropped with a specific disclosure (`rs274-bad-expression`,
-`rs274-uninitialized-param`, `rs274-unsupported-sysparam`) and parsing continues.
-
-Honest and additive: a new `parametricProgram` capability (`known` when executed, `unavailable`
-otherwise). Engaged only on lines that use `#`/`[` — every FDM and simple-CNC line takes the untouched
-lexer and is **byte-identical** (native goldens regenerated for the additive capability key only; the
-detection gate adds ~2.7% to a large FDM parse, geometry unchanged).
-
-**Scope: Phase 1 (parameters + expressions) only.** O-word control flow (`if`/`while`/`sub`/`call`) is a
-later phase and is not yet supported — such constructs are ignored (and will be disclosed) for now.
diff --git a/.changeset/dd017-phase2-oword-flow.md b/.changeset/dd017-phase2-oword-flow.md
deleted file mode 100644
index 57645c30..00000000
--- a/.changeset/dd017-phase2-oword-flow.md
+++ /dev/null
@@ -1,32 +0,0 @@
----
-"@chestnutlabs/gcode-parser": minor
----
-
-feat(parser): RS274NGC O-word control flow (DD-017 Phase 2, #189 phase 7)
-
-Building on Phase 1's parameters + expressions, the parser now **executes** the RS274NGC O-word control
-structures that CAM / LinuxCNC programs use to generate geometry: `if`/`elseif`/`else`/`endif`,
-`while`/`endwhile`, `do`/`while`, `repeat`/`endrepeat`, and `break`/`continue`. A bolt-circle written as
-a `while` loop over a computed angle, a pocket cut by a `repeat`, an `if` that selects a tool path —
-these previously ran once (or not at all) because the parser is forward-only; they now resolve to the
-full, correct toolpath.
-
-A new module (`rs274-flow.ts`) is the program-buffered interpreter of DD-017 D1: engaged **only** when a
-program actually contains an O-word control line (a cheap detection scan), it buffers the program, builds
-a block tree, and executes it — feeding every non-control line back through the same engine so
-geometry/params/expressions stay on one code path. Loops evaluate their conditions/counts against the
-same shared parameter store, so `#<i> = [#<i> + 1]` inside a loop body does what you expect.
-
-**Bounded and safe (this is now a small interpreter).** A new `maxProgramIterations` limit (default
-`1_000_000`) bounds **total loop work** — charged per loop pass *and* per statement executed inside a
-loop body, so a large body cannot multiply the real work past the cap — and stops a runaway `o while [1]`
-with a partial result and a `rs274-iteration-limit` disclosure. Structural nesting is capped; loops are
-ordinary iteration, not recursion, so an adversarial program can waste only bounded CPU — it cannot hang,
-blow the stack, or OOM the worker. There is no `eval` and no I/O.
-
-**Honest and additive.** Clean flow keeps `parametricProgram: 'known'`; a degraded run (a hit iteration
-cap, an unbalanced or unsupported O-word, or a malformed condition) reports `'approximated'` and always
-emits a specific disclosure — never silently wrong. Subroutines (`sub`/`call`/`return`) are a later phase
-and are explicitly disclosed as unsupported and **not** executed inline. Non-parametric input never
-enters the interpreter and stays **byte-identical** (both golden suites unchanged). Streaming input, which
-cannot re-run a line range from a partial stream, discloses and runs linearly.
diff --git a/.changeset/dd017-phase3-subroutines.md b/.changeset/dd017-phase3-subroutines.md
deleted file mode 100644
index 757e6bd0..00000000
--- a/.changeset/dd017-phase3-subroutines.md
+++ /dev/null
@@ -1,31 +0,0 @@
----
-"@chestnutlabs/gcode-parser": minor
----
-
-feat(parser): RS274NGC subroutines (DD-017 Phase 3, #189 phase 7)
-
-Completes the RS274NGC programming layer: the parser now executes in-file O-word **subroutines** —
-`o<id> sub`/`endsub`, `o<id> call [args]`, and `o<id> return`. A `call` binds its arguments to `#1`..`#30`
-in a fresh call frame, runs the named sub's body, and returns; `return` exits early. Subroutines may be
-forward-referenced (a `call` before the `sub` that defines it) and may recurse. This is how CAM/LinuxCNC
-programs factor repeated geometry (a "stamp" drilled at many positions, a parametric feature reused
-across a part).
-
-**Correct scoping (recursion-safe).** Numbered parameters `#1`..`#30` and non-underscore named parameters
-(`#<local>`) are LOCAL to each call frame; `#31`+ and underscore-named (`#<_global>`) are shared globals —
-matching LinuxCNC. A recursive sub's `#1` therefore cannot clobber its caller's, and a sub's locals do not
-leak out. The main program runs in the base scope, so a program that uses no subroutines behaves exactly
-as before (byte-identical; both golden suites unchanged).
-
-**Bounded and safe.** A new `maxCallDepth` limit (default `50`) caps subroutine recursion — an unbounded
-or mutually-recursive `call` is disclosed (`rs274-call-depth`) and skipped, never a stack overflow. A
-runtime execution-depth backstop additionally bounds the combined structural-nesting + call-depth JS
-recursion. A sub called inside a loop still charges its body work against `maxProgramIterations`, so a huge
-sub body cannot multiply work past the cap. `break`/`continue`/`return` are frame-local — they never jump
-across a call boundary.
-
-**Honest.** Clean subroutine execution keeps `parametricProgram: 'known'`; a degraded run (unknown sub,
-recursion-limit hit, duplicate definition, misplaced `return`) reports `'approximated'` with a specific
-disclosure — never silently wrong. Subroutine return VALUES are not yet propagated to the caller (a
-documented Phase-3 limitation; `return` acts as an early exit). External subroutine files (`M98`,
-`o<name> call` resolving to a separate `.ngc`) remain an explicit non-goal (no I/O in the parser).
diff --git a/.changeset/dd030-bed-geometry.md b/.changeset/dd030-bed-geometry.md
deleted file mode 100644
index 57b4a292..00000000
--- a/.changeset/dd030-bed-geometry.md
+++ /dev/null
@@ -1,23 +0,0 @@
----
-"@chestnutlabs/gcode-renderer-three": minor
----
-
-feat(renderer): non-rectangular build-bed geometry (DD-030 D3)
-
-The build volume can now draw an **honest non-rectangular bed** — delta, round, or irregular — instead of
-only a rectangle. `BuildVolumeDef` gains an optional `shape?: BedShape`
-(`{kind:'rect'} | {kind:'circular', center, diameter} | {kind:'polygon', points}`): a circle is
-polygonized, the outline is filled and drawn, and the floor grid is **clipped to the outline** so the
-printable area reads correctly (a round bed is no longer a square with a circle floating over it). The
-`mesh` escape hatch for a fully custom bed mesh is reserved for a later phase.
-
-`machineToVolume()` now maps a discovered `MachineGeometry.bed` of kind `circular`/`polygon` onto that
-`shape`, so a **discovered** round/delta bed renders as its true outline instead of being collapsed to its
-bounding rectangle (a visible improvement for delta/round printers). Callers supply the shape (from a
-machine profile, a config, wherever); the renderer just draws the polygon — no profile parsing in the
-library, no vendor semantics baked in.
-
-Additive and safe: a bed with no `shape` (or `{kind:'rect'}`) takes the original rectangular path and is
-**byte-identical** — the rectangular grid, plate, cage, excluded-region outlines, and origin tripod are
-unchanged. The volume cage stays a bounding box (the bed outline carries the shape). First increment of
-the DD-030 renderer/viewer interoperability batch.
diff --git a/.changeset/dd030-capture.md b/.changeset/dd030-capture.md
deleted file mode 100644
index 866c0329..00000000
--- a/.changeset/dd030-capture.md
+++ /dev/null
@@ -1,32 +0,0 @@
----
-"@chestnutlabs/gcode-renderer-three": minor
-"@chestnutlabs/gcode-model-renderer": minor
-"@chestnutlabs/gcode-preview-core": minor
-"@chestnutlabs/gcode-preview-element": minor
----
-
-feat(renderer): interactive view capture() → Blob (DD-030 D1)
-
-The interactive viewer can now hand back **what is on screen right now** as an image `Blob` — for a
-user-selected thumbnail, a large-file thumbnail fallback, or a screenshot. New `capture(opts?)` where
-`opts` is `{ width?, height?, format?, quality?, background? }` (all optional; defaults match the live
-view).
-
-Available on every interactive surface: `GcodePreviewControls.capture()` (so the Vue, React, Svelte, and
-Web-Component adapters all inherit it — the Web Component also exposes an imperative `capture()` method),
-and `ModelViewer.capture()` on the model-viewer handle. The toolpath `ToolpathRenderer` and the shared
-`InteractiveStage` carry the implementation.
-
-**Mechanism (render-to-target).** Capture renders the current scene + active camera into an off-screen
-`WebGLRenderTarget` at the requested size and reads it back, rather than flipping the interactive
-context's `preserveDrawingBuffer` (which would tax every interactive frame). That gives an arbitrary
-output size and an independent/transparent background **without** disturbing the live view, and reuses the
-headless still path's "single render, then read pixels" recipe. The thumbnail is framed at its own aspect
-so it isn't distorted; the live view is repainted afterward. The library returns the `Blob` and **never**
-triggers a download — the caller owns the pixels (same contract as `renderStill`).
-
-**Honest.** When the renderer cannot render-to-target (the 2D renderer, a stub GL / no WebGL) or the stage
-is disposed / its context is lost, `capture()` rejects with a typed `CaptureUnsupportedError`
-(`code: 'E_CAPTURE_UNSUPPORTED'`) — never fabricated output. Purely additive (a new optional method on the
-renderer contract; no existing signature changed). Final increment of the DD-030 renderer/viewer
-interoperability batch (bed + per-plate scope + capture).
diff --git a/.changeset/dd030-render-scope.md b/.changeset/dd030-render-scope.md
deleted file mode 100644
index a4aeb35a..00000000
--- a/.changeset/dd030-render-scope.md
+++ /dev/null
@@ -1,28 +0,0 @@
----
-"@chestnutlabs/gcode-model-renderer": minor
----
-
-feat(model-renderer): per-plate / object-subset render scope (DD-030 D2)
-
-A caller can now render just **one plate** (or any object/placement subset) of a multi-plate / multi-object
-source, instead of always the whole project — so a single-plate variant thumbnail looks like *that* plate.
-
-New `RenderScope` selector — `{ plateId }`, `{ objectIds }`, or `{ instanceFilter }` — with a pure,
-three-free `applyRenderScope(scene, scope)` that returns a filtered `ModelScene` (dropping non-matching
-objects/placements) with `bounds` recomputed from the kept placements, so framing follows the subset.
-`{ plateId }` is sugar over the placement-level `plateIds` (DD-025); it's generic (a plate is just one way
-to derive the subset) and vendor-neutral.
-
-Wired into both surfaces:
-- `renderModelStill` gains a `renderScope?` option; it also folds the scope into the still `cacheKey` so a
-  plate-1 and a plate-2 thumbnail of the same source key distinctly (an opaque `instanceFilter` is marked
-  non-cacheable).
-- `createModelViewer` gains an initial `renderScope?` and a `setRenderScope(scope | null)` handle method
-  that rebuilds and reframes to the subset (`null` restores the whole source).
-
-Honest and additive: omitting `renderScope` renders the whole project exactly as before. A `{ plateId }`
-that matches nothing (e.g. a source with no declared plate structure, `capabilities.plates !== 'known'`)
-renders an **empty** scene by design — the honest result of selecting a plate that isn't declared;
-consumers gate `{ plateId }` on `plates: 'known'`. The source's declared `plates`/`capabilities` are
-preserved (only what is *rendered* is narrowed). Second increment of the DD-030 renderer/viewer interop
-batch.
diff --git a/README.md b/README.md
index a5147165..09965583 100644
--- a/README.md
+++ b/README.md
@@ -395,7 +395,7 @@ row inspects the *toolpath*, the bottom row presents the *source model* (see
 
 Design rationale, boundaries, and the accepted architecture live in
 [`docs/design/`](docs/design); the [docs index](docs/README.md) maps the whole set. Fourteen
-packages publish to npm in lockstep (currently **v0.17.0**) with npm provenance.
+packages publish to npm in lockstep (currently **v0.18.0**) with npm provenance.
 
 ## Development
 
diff --git a/RELEASE_NOTES_DRAFT.md b/RELEASE_NOTES_DRAFT.md
new file mode 100644
index 00000000..5b1766f5
--- /dev/null
+++ b/RELEASE_NOTES_DRAFT.md
@@ -0,0 +1,37 @@
+# Release notes draft — v0.18.0
+
+> Auto-generated by `tools/release/stamp-release-docs.mjs` from this release's package
+> CHANGELOGs. **Review and rewrite into prose**, fold it into the two curated surfaces in
+> `docs/README.md`, then DELETE this file. The release gate (`npm run docs:release-check`)
+> blocks promotion to `main` until this file is gone and those surfaces name v0.18.0.
+
+## 1. Update the "Current state" block (docs/README.md)
+Lead it with the new version, e.g.:
+
+`## Current state (updated <YYYY-MM-DD> — **v0.18.0 shipped to npm** (14 lockstep pkgs): <one-to-three sentence story>. Prior: **v<previous>** …)`
+
+## 2. Add the release-history line (docs/README.md, the "publishing from tagged … Releases (…)" list)
+Append: `` `v0.18.0` <short label> ``
+
+## Proposed points (deduped from this release's changelogs)
+- [#418](https://github.com/ChestnutLabs/gcode-preview/pull/418) [`c950339`](https://github.com/ChestnutLabs/gcode-preview/commit/c95033908e3ebaeb07b6f7e6f2487672dcc463f0) Thanks [@sobechestnut-dev](https://github.com/sobechestnut-dev)! - feat(renderer): interactive view capture() → Blob (DD-030 D1)
+- [#417](https://github.com/ChestnutLabs/gcode-preview/pull/417) [`5dc8079`](https://github.com/ChestnutLabs/gcode-preview/commit/5dc80794444742beddafe1c37322db751af50020) Thanks [@sobechestnut-dev](https://github.com/sobechestnut-dev)! - feat(model-renderer): per-plate / object-subset render scope (DD-030 D2)
+- `renderModelStill` gains a `renderScope?` option; it also folds the scope into the still `cacheKey` so a
+- `createModelViewer` gains an initial `renderScope?` and a `setRenderScope(scope | null)` handle method
+- [#410](https://github.com/ChestnutLabs/gcode-preview/pull/410) [`5144890`](https://github.com/ChestnutLabs/gcode-preview/commit/51448906f87ca09f3ed11f1286f7b79356110a83) Thanks [@sobechestnut-dev](https://github.com/sobechestnut-dev)! - feat(parser): RS274NGC parameters + expressions (DD-017 Phase 1, [#189](https://github.com/ChestnutLabs/gcode-preview/issues/189) phase 7)
+- [#413](https://github.com/ChestnutLabs/gcode-preview/pull/413) [`bcb4b78`](https://github.com/ChestnutLabs/gcode-preview/commit/bcb4b786fcfc6a2e967d8bfff1d4fd3a06731681) Thanks [@sobechestnut-dev](https://github.com/sobechestnut-dev)! - feat(parser): RS274NGC O-word control flow (DD-017 Phase 2, [#189](https://github.com/ChestnutLabs/gcode-preview/issues/189) phase 7)
+- [#415](https://github.com/ChestnutLabs/gcode-preview/pull/415) [`dc89056`](https://github.com/ChestnutLabs/gcode-preview/commit/dc890568d45e59635b9994d8409ef6cdc0847f80) Thanks [@sobechestnut-dev](https://github.com/sobechestnut-dev)! - feat(parser): RS274NGC subroutines (DD-017 Phase 3, [#189](https://github.com/ChestnutLabs/gcode-preview/issues/189) phase 7)
+- [#416](https://github.com/ChestnutLabs/gcode-preview/pull/416) [`0ebeadf`](https://github.com/ChestnutLabs/gcode-preview/commit/0ebeadfa839e52baf243ef07b5807f3974bbac7e) Thanks [@sobechestnut-dev](https://github.com/sobechestnut-dev)! - feat(renderer): non-rectangular build-bed geometry (DD-030 D3)
+
+## Packages changed this release
+- @chestnutlabs/gcode-model-renderer
+- @chestnutlabs/gcode-parser
+- @chestnutlabs/gcode-preview-core
+- @chestnutlabs/gcode-preview-element
+- @chestnutlabs/gcode-renderer-three
+
+## Before you cut the tag — public-docs completion check (CLAUDE.md)
+- [ ] Root README still accurate for any new user-visible capability?
+- [ ] Package README / user guide updated where behavior changed?
+- [ ] Any existing screenshot now misrepresents the software? (regenerate via tools/screenshots/)
+- [ ] Quick-start / example code still shows the recommended API?
diff --git a/docs/README.md b/docs/README.md
index 3204c67e..03b7b6f4 100644
--- a/docs/README.md
+++ b/docs/README.md
@@ -67,7 +67,7 @@ golden/native fixtures + manifest with CI validation, boundary lint, license CI
 consumer smoke harnesses, plus the five framework adapters (`gcode-preview-core`/`-vue`/`-react`/
 `-svelte`/`-element`) and the presentation renderer (`gcode-model-renderer`). CI (`build`) is a
 required check on `main`/`dev`. **All fourteen `@chestnutlabs/*` packages are published to npm at
-`v0.17.0`** (lockstep, npm provenance); `main` is the release branch, publishing from tagged GitHub
+`v0.18.0`** (lockstep, npm provenance); `main` is the release branch, publishing from tagged GitHub
 Releases (`v0.1.0` E7/DD-008, `v0.2.0` E9/DD-009, `v0.3.0` E8/#188, `v0.4.0` #189 non-extrusion,
 `v0.5.x` hardening #279, `v0.6.0`/`v0.7.0` ModelRenderer + toolpath batch #296/#306, `v0.8.1` 3MF
 `paint_color` multicolor decode, `v0.9.0` interactive `createModelViewer` #296/DD-021, `v0.10.0`
diff --git a/docs/manual/index.md b/docs/manual/index.md
index 244037b7..56d339cc 100644
--- a/docs/manual/index.md
+++ b/docs/manual/index.md
@@ -67,6 +67,6 @@ viewer is reachable without switching APIs.
   [Live progress & motion model](concept-progress-motion.md).
 - **API reference** — pick a package in the sidebar (`toolpath-core`, `gcode-parser`, …).
 
-> **Status:** published — all fourteen `@chestnutlabs/*` packages are on npm (latest `v0.17.0`,
+> **Status:** published — all fourteen `@chestnutlabs/*` packages are on npm (latest `v0.18.0`,
 > lockstep-versioned with provenance). Governance and epic status live in the
 > [repository docs](https://github.com/ChestnutLabs/gcode-preview/tree/dev/docs).
diff --git a/package-lock.json b/package-lock.json
index a039c8b3..ad9c304f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -7389,11 +7389,11 @@
     },
     "packages/gcode-bgcode": {
       "name": "@chestnutlabs/gcode-bgcode",
-      "version": "0.17.0",
+      "version": "0.18.0",
       "license": "MIT",
       "dependencies": {
-        "@chestnutlabs/gcode-containers": "0.17.0",
-        "@chestnutlabs/toolpath-core": "0.17.0"
+        "@chestnutlabs/gcode-containers": "0.18.0",
+        "@chestnutlabs/toolpath-core": "0.18.0"
       },
       "engines": {
         "node": ">=22"
@@ -7401,10 +7401,10 @@
     },
     "packages/gcode-colors": {
       "name": "@chestnutlabs/gcode-colors",
-      "version": "0.17.0",
+      "version": "0.18.0",
       "license": "MIT",
       "dependencies": {
-        "@chestnutlabs/toolpath-core": "0.17.0"
+        "@chestnutlabs/toolpath-core": "0.18.0"
       },
       "engines": {
         "node": ">=22"
@@ -7412,10 +7412,10 @@
     },
     "packages/gcode-containers": {
       "name": "@chestnutlabs/gcode-containers",
-      "version": "0.17.0",
+      "version": "0.18.0",
       "license": "MIT",
       "dependencies": {
-        "@chestnutlabs/toolpath-core": "0.17.0"
+        "@chestnutlabs/toolpath-core": "0.18.0"
       },
       "engines": {
         "node": ">=22"
@@ -7423,10 +7423,10 @@
     },
     "packages/gcode-dialects": {
       "name": "@chestnutlabs/gcode-dialects",
-      "version": "0.17.0",
+      "version": "0.18.0",
       "license": "MIT",
       "dependencies": {
-        "@chestnutlabs/toolpath-core": "0.17.0"
+        "@chestnutlabs/toolpath-core": "0.18.0"
       },
       "engines": {
         "node": ">=22"
@@ -7434,12 +7434,12 @@
     },
     "packages/gcode-model-renderer": {
       "name": "@chestnutlabs/gcode-model-renderer",
-      "version": "0.17.0",
+      "version": "0.18.0",
       "license": "MIT",
       "dependencies": {
-        "@chestnutlabs/gcode-containers": "0.17.0",
-        "@chestnutlabs/gcode-renderer-three": "0.17.0",
-        "@chestnutlabs/toolpath-core": "0.17.0"
+        "@chestnutlabs/gcode-containers": "0.18.0",
+        "@chestnutlabs/gcode-renderer-three": "0.18.0",
+        "@chestnutlabs/toolpath-core": "0.18.0"
       },
       "devDependencies": {
         "@types/three": "0.178.0"
@@ -7453,13 +7453,13 @@
     },
     "packages/gcode-parser": {
       "name": "@chestnutlabs/gcode-parser",
-      "version": "0.17.0",
+      "version": "0.18.0",
       "license": "MIT",
       "dependencies": {
-        "@chestnutlabs/gcode-bgcode": "0.17.0",
-        "@chestnutlabs/gcode-containers": "0.17.0",
-        "@chestnutlabs/gcode-dialects": "0.17.0",
-        "@chestnutlabs/toolpath-core": "0.17.0"
+        "@chestnutlabs/gcode-bgcode": "0.18.0",
+        "@chestnutlabs/gcode-containers": "0.18.0",
+        "@chestnutlabs/gcode-dialects": "0.18.0",
+        "@chestnutlabs/toolpath-core": "0.18.0"
       },
       "engines": {
         "node": ">=22"
@@ -7467,13 +7467,13 @@
     },
     "packages/gcode-preview-core": {
       "name": "@chestnutlabs/gcode-preview-core",
-      "version": "0.17.0",
+      "version": "0.18.0",
       "license": "MIT",
       "dependencies": {
-        "@chestnutlabs/gcode-parser": "0.17.0",
-        "@chestnutlabs/gcode-renderer-2d": "0.17.0",
-        "@chestnutlabs/gcode-renderer-three": "0.17.0",
-        "@chestnutlabs/toolpath-core": "0.17.0"
+        "@chestnutlabs/gcode-parser": "0.18.0",
+        "@chestnutlabs/gcode-renderer-2d": "0.18.0",
+        "@chestnutlabs/gcode-renderer-three": "0.18.0",
+        "@chestnutlabs/toolpath-core": "0.18.0"
       },
       "engines": {
         "node": ">=22"
@@ -7481,13 +7481,13 @@
     },
     "packages/gcode-preview-element": {
       "name": "@chestnutlabs/gcode-preview-element",
-      "version": "0.17.0",
+      "version": "0.18.0",
       "license": "MIT",
       "dependencies": {
-        "@chestnutlabs/gcode-parser": "0.17.0",
-        "@chestnutlabs/gcode-preview-core": "0.17.0",
-        "@chestnutlabs/gcode-renderer-three": "0.17.0",
-        "@chestnutlabs/toolpath-core": "0.17.0"
+        "@chestnutlabs/gcode-parser": "0.18.0",
+        "@chestnutlabs/gcode-preview-core": "0.18.0",
+        "@chestnutlabs/gcode-renderer-three": "0.18.0",
+        "@chestnutlabs/toolpath-core": "0.18.0"
       },
       "engines": {
         "node": ">=22"
@@ -7495,13 +7495,13 @@
     },
     "packages/gcode-preview-react": {
       "name": "@chestnutlabs/gcode-preview-react",
-      "version": "0.17.0",
+      "version": "0.18.0",
       "license": "MIT",
       "dependencies": {
-        "@chestnutlabs/gcode-parser": "0.17.0",
-        "@chestnutlabs/gcode-preview-core": "0.17.0",
-        "@chestnutlabs/gcode-renderer-three": "0.17.0",
-        "@chestnutlabs/toolpath-core": "0.17.0"
+        "@chestnutlabs/gcode-parser": "0.18.0",
+        "@chestnutlabs/gcode-preview-core": "0.18.0",
+        "@chestnutlabs/gcode-renderer-three": "0.18.0",
+        "@chestnutlabs/toolpath-core": "0.18.0"
       },
       "devDependencies": {
         "@types/react": "^18.3.0",
@@ -7517,13 +7517,13 @@
     },
     "packages/gcode-preview-svelte": {
       "name": "@chestnutlabs/gcode-preview-svelte",
-      "version": "0.17.0",
+      "version": "0.18.0",
       "license": "MIT",
       "dependencies": {
-        "@chestnutlabs/gcode-parser": "0.17.0",
-        "@chestnutlabs/gcode-preview-core": "0.17.0",
-        "@chestnutlabs/gcode-renderer-three": "0.17.0",
-        "@chestnutlabs/toolpath-core": "0.17.0"
+        "@chestnutlabs/gcode-parser": "0.18.0",
+        "@chestnutlabs/gcode-preview-core": "0.18.0",
+        "@chestnutlabs/gcode-renderer-three": "0.18.0",
+        "@chestnutlabs/toolpath-core": "0.18.0"
       },
       "devDependencies": {
         "svelte": "^4.2.0"
@@ -7537,13 +7537,13 @@
     },
     "packages/gcode-preview-vue": {
       "name": "@chestnutlabs/gcode-preview-vue",
-      "version": "0.17.0",
+      "version": "0.18.0",
       "license": "MIT",
       "dependencies": {
-        "@chestnutlabs/gcode-parser": "0.17.0",
-        "@chestnutlabs/gcode-preview-core": "0.17.0",
-        "@chestnutlabs/gcode-renderer-three": "0.17.0",
-        "@chestnutlabs/toolpath-core": "0.17.0"
+        "@chestnutlabs/gcode-parser": "0.18.0",
+        "@chestnutlabs/gcode-preview-core": "0.18.0",
+        "@chestnutlabs/gcode-renderer-three": "0.18.0",
+        "@chestnutlabs/toolpath-core": "0.18.0"
       },
       "devDependencies": {
         "vue": "^3.4.0"
@@ -7557,11 +7557,11 @@
     },
     "packages/gcode-renderer-2d": {
       "name": "@chestnutlabs/gcode-renderer-2d",
-      "version": "0.17.0",
+      "version": "0.18.0",
       "license": "MIT",
       "dependencies": {
-        "@chestnutlabs/gcode-colors": "0.17.0",
-        "@chestnutlabs/toolpath-core": "0.17.0"
+        "@chestnutlabs/gcode-colors": "0.18.0",
+        "@chestnutlabs/toolpath-core": "0.18.0"
       },
       "engines": {
         "node": ">=22"
@@ -7569,11 +7569,11 @@
     },
     "packages/gcode-renderer-three": {
       "name": "@chestnutlabs/gcode-renderer-three",
-      "version": "0.17.0",
+      "version": "0.18.0",
       "license": "MIT",
       "dependencies": {
-        "@chestnutlabs/gcode-colors": "0.17.0",
-        "@chestnutlabs/toolpath-core": "0.17.0"
+        "@chestnutlabs/gcode-colors": "0.18.0",
+        "@chestnutlabs/toolpath-core": "0.18.0"
       },
       "devDependencies": {
         "@types/three": "0.178.0"
@@ -7587,7 +7587,7 @@
     },
     "packages/toolpath-core": {
       "name": "@chestnutlabs/toolpath-core",
-      "version": "0.17.0",
+      "version": "0.18.0",
       "license": "MIT",
       "engines": {
         "node": ">=22"
diff --git a/packages/gcode-bgcode/CHANGELOG.md b/packages/gcode-bgcode/CHANGELOG.md
index c9a8b027..af1c11f5 100644
--- a/packages/gcode-bgcode/CHANGELOG.md
+++ b/packages/gcode-bgcode/CHANGELOG.md
@@ -1,5 +1,13 @@
 # @chestnutlabs/gcode-bgcode
 
+## 0.18.0
+
+### Patch Changes
+
+- Updated dependencies []:
+  - @chestnutlabs/gcode-containers@0.18.0
+  - @chestnutlabs/toolpath-core@0.18.0
+
 ## 0.17.0
 
 ### Patch Changes
diff --git a/packages/gcode-bgcode/package.json b/packages/gcode-bgcode/package.json
index fe359813..2b6dd74c 100644
--- a/packages/gcode-bgcode/package.json
+++ b/packages/gcode-bgcode/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@chestnutlabs/gcode-bgcode",
-  "version": "0.17.0",
+  "version": "0.18.0",
   "description": "Binary G-code (.bgcode) decode adapter for the Chestnut Labs G-code toolpath stack (DD-011): a license-clean, in-memory block walker that decodes Prusa .bgcode to plain G-code for the existing parser/dialect/renderer pipeline. Decode-only.",
   "keywords": [
     "gcode",
@@ -47,7 +47,7 @@
     "test": "vitest run"
   },
   "dependencies": {
-    "@chestnutlabs/toolpath-core": "0.17.0",
-    "@chestnutlabs/gcode-containers": "0.17.0"
+    "@chestnutlabs/toolpath-core": "0.18.0",
+    "@chestnutlabs/gcode-containers": "0.18.0"
   }
 }
diff --git a/packages/gcode-colors/CHANGELOG.md b/packages/gcode-colors/CHANGELOG.md
index 86e4aa83..fe63fb2e 100644
--- a/packages/gcode-colors/CHANGELOG.md
+++ b/packages/gcode-colors/CHANGELOG.md
@@ -1,5 +1,12 @@
 # @chestnutlabs/gcode-colors
 
+## 0.18.0
+
+### Patch Changes
+
+- Updated dependencies []:
+  - @chestnutlabs/toolpath-core@0.18.0
+
 ## 0.17.0
 
 ### Patch Changes
diff --git a/packages/gcode-colors/package.json b/packages/gcode-colors/package.json
index b6f13bab..aa9e8c07 100644
--- a/packages/gcode-colors/package.json
+++ b/packages/gcode-colors/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@chestnutlabs/gcode-colors",
-  "version": "0.17.0",
+  "version": "0.18.0",
   "description": "Renderer-agnostic per-segment color model for the Chestnut Labs G-code toolpath stack (DD-014 D3): the ColorMode union and honest, capability-gated segment coloring over ToolpathIR channels, shared by the 3D and 2D renderers.",
   "keywords": [
     "gcode",
@@ -47,6 +47,6 @@
     "test": "vitest run"
   },
   "dependencies": {
-    "@chestnutlabs/toolpath-core": "0.17.0"
+    "@chestnutlabs/toolpath-core": "0.18.0"
   }
 }
diff --git a/packages/gcode-containers/CHANGELOG.md b/packages/gcode-containers/CHANGELOG.md
index 56f9ab88..2c63739e 100644
--- a/packages/gcode-containers/CHANGELOG.md
+++ b/packages/gcode-containers/CHANGELOG.md
@@ -1,5 +1,12 @@
 # @chestnutlabs/gcode-containers
 
+## 0.18.0
+
+### Patch Changes
+
+- Updated dependencies []:
+  - @chestnutlabs/toolpath-core@0.18.0
+
 ## 0.17.0
 
 ### Patch Changes
diff --git a/packages/gcode-containers/package.json b/packages/gcode-containers/package.json
index b6cae034..9bc84ffe 100644
--- a/packages/gcode-containers/package.json
+++ b/packages/gcode-containers/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@chestnutlabs/gcode-containers",
-  "version": "0.17.0",
+  "version": "0.18.0",
   "description": "Safe, bounded, in-memory container extraction for sliced G-code (.gcode.3mf) — DD-005 §4.4/§7. Never writes files, never fetches, zero dependencies.",
   "keywords": [
     "gcode",
@@ -42,6 +42,6 @@
     "test": "vitest run"
   },
   "dependencies": {
-    "@chestnutlabs/toolpath-core": "0.17.0"
+    "@chestnutlabs/toolpath-core": "0.18.0"
   }
 }
diff --git a/packages/gcode-dialects/CHANGELOG.md b/packages/gcode-dialects/CHANGELOG.md
index f91b37ff..1f808aba 100644
--- a/packages/gcode-dialects/CHANGELOG.md
+++ b/packages/gcode-dialects/CHANGELOG.md
@@ -1,5 +1,12 @@
 # @chestnutlabs/gcode-dialects
 
+## 0.18.0
+
+### Patch Changes
+
+- Updated dependencies []:
+  - @chestnutlabs/toolpath-core@0.18.0
+
 ## 0.17.0
 
 ### Minor Changes
diff --git a/packages/gcode-dialects/package.json b/packages/gcode-dialects/package.json
index 6b399c53..1244a8c1 100644
--- a/packages/gcode-dialects/package.json
+++ b/packages/gcode-dialects/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@chestnutlabs/gcode-dialects",
-  "version": "0.17.0",
+  "version": "0.18.0",
   "description": "Slicer/firmware dialect adapters for ToolpathIR annotation (DD-005). Adapters annotate metadata and optional channels — they can never alter geometry.",
   "keywords": [
     "gcode",
@@ -45,6 +45,6 @@
     "test": "vitest run"
   },
   "dependencies": {
-    "@chestnutlabs/toolpath-core": "0.17.0"
+    "@chestnutlabs/toolpath-core": "0.18.0"
   }
 }
diff --git a/packages/gcode-model-renderer/CHANGELOG.md b/packages/gcode-model-renderer/CHANGELOG.md
index 7bcb2fa0..653fd651 100644
--- a/packages/gcode-model-renderer/CHANGELOG.md
+++ b/packages/gcode-model-renderer/CHANGELOG.md
@@ -1,5 +1,67 @@
 # @chestnutlabs/gcode-model-renderer
 
+## 0.18.0
+
+### Minor Changes
+
+- [#418](https://github.com/ChestnutLabs/gcode-preview/pull/418) [`c950339`](https://github.com/ChestnutLabs/gcode-preview/commit/c95033908e3ebaeb07b6f7e6f2487672dcc463f0) Thanks [@sobechestnut-dev](https://github.com/sobechestnut-dev)! - feat(renderer): interactive view capture() → Blob (DD-030 D1)
+
+  The interactive viewer can now hand back **what is on screen right now** as an image `Blob` — for a
+  user-selected thumbnail, a large-file thumbnail fallback, or a screenshot. New `capture(opts?)` where
+  `opts` is `{ width?, height?, format?, quality?, background? }` (all optional; defaults match the live
+  view).
+
+  Available on every interactive surface: `GcodePreviewControls.capture()` (so the Vue, React, Svelte, and
+  Web-Component adapters all inherit it — the Web Component also exposes an imperative `capture()` method),
+  and `ModelViewer.capture()` on the model-viewer handle. The toolpath `ToolpathRenderer` and the shared
+  `InteractiveStage` carry the implementation.
+
+  **Mechanism (render-to-target).** Capture renders the current scene + active camera into an off-screen
+  `WebGLRenderTarget` at the requested size and reads it back, rather than flipping the interactive
+  context's `preserveDrawingBuffer` (which would tax every interactive frame). That gives an arbitrary
+  output size and an independent/transparent background **without** disturbing the live view, and reuses the
+  headless still path's "single render, then read pixels" recipe. The thumbnail is framed at its own aspect
+  so it isn't distorted; the live view is repainted afterward. The library returns the `Blob` and **never**
+  triggers a download — the caller owns the pixels (same contract as `renderStill`).
+
+  **Honest.** When the renderer cannot render-to-target (the 2D renderer, a stub GL / no WebGL) or the stage
+  is disposed / its context is lost, `capture()` rejects with a typed `CaptureUnsupportedError`
+  (`code: 'E_CAPTURE_UNSUPPORTED'`) — never fabricated output. Purely additive (a new optional method on the
+  renderer contract; no existing signature changed). Final increment of the DD-030 renderer/viewer
+  interoperability batch (bed + per-plate scope + capture).
+
+- [#417](https://github.com/ChestnutLabs/gcode-preview/pull/417) [`5dc8079`](https://github.com/ChestnutLabs/gcode-preview/commit/5dc80794444742beddafe1c37322db751af50020) Thanks [@sobechestnut-dev](https://github.com/sobechestnut-dev)! - feat(model-renderer): per-plate / object-subset render scope (DD-030 D2)
+
+  A caller can now render just **one plate** (or any object/placement subset) of a multi-plate / multi-object
+  source, instead of always the whole project — so a single-plate variant thumbnail looks like _that_ plate.
+
+  New `RenderScope` selector — `{ plateId }`, `{ objectIds }`, or `{ instanceFilter }` — with a pure,
+  three-free `applyRenderScope(scene, scope)` that returns a filtered `ModelScene` (dropping non-matching
+  objects/placements) with `bounds` recomputed from the kept placements, so framing follows the subset.
+  `{ plateId }` is sugar over the placement-level `plateIds` (DD-025); it's generic (a plate is just one way
+  to derive the subset) and vendor-neutral.
+
+  Wired into both surfaces:
+  - `renderModelStill` gains a `renderScope?` option; it also folds the scope into the still `cacheKey` so a
+    plate-1 and a plate-2 thumbnail of the same source key distinctly (an opaque `instanceFilter` is marked
+    non-cacheable).
+  - `createModelViewer` gains an initial `renderScope?` and a `setRenderScope(scope | null)` handle method
+    that rebuilds and reframes to the subset (`null` restores the whole source).
+
+  Honest and additive: omitting `renderScope` renders the whole project exactly as before. A `{ plateId }`
+  that matches nothing (e.g. a source with no declared plate structure, `capabilities.plates !== 'known'`)
+  renders an **empty** scene by design — the honest result of selecting a plate that isn't declared;
+  consumers gate `{ plateId }` on `plates: 'known'`. The source's declared `plates`/`capabilities` are
+  preserved (only what is _rendered_ is narrowed). Second increment of the DD-030 renderer/viewer interop
+  batch.
+
+### Patch Changes
+
+- Updated dependencies [[`0ebeadf`](https://github.com/ChestnutLabs/gcode-preview/commit/0ebeadfa839e52baf243ef07b5807f3974bbac7e), [`c950339`](https://github.com/ChestnutLabs/gcode-preview/commit/c95033908e3ebaeb07b6f7e6f2487672dcc463f0)]:
+  - @chestnutlabs/gcode-renderer-three@0.18.0
+  - @chestnutlabs/gcode-containers@0.18.0
+  - @chestnutlabs/toolpath-core@0.18.0
+
 ## 0.17.0
 
 ### Patch Changes
diff --git a/packages/gcode-model-renderer/package.json b/packages/gcode-model-renderer/package.json
index e6243b65..29911c54 100644
--- a/packages/gcode-model-renderer/package.json
+++ b/packages/gcode-model-renderer/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@chestnutlabs/gcode-model-renderer",
-  "version": "0.17.0",
+  "version": "0.18.0",
   "description": "Three.js presentation renderer for source models (STL/3MF) — clean thumbnails/cards, distinct from toolpath inspection (DD-018).",
   "keywords": [
     "3d-printing",
@@ -51,9 +51,9 @@
     "test": "vitest run"
   },
   "dependencies": {
-    "@chestnutlabs/gcode-containers": "0.17.0",
-    "@chestnutlabs/gcode-renderer-three": "0.17.0",
-    "@chestnutlabs/toolpath-core": "0.17.0"
+    "@chestnutlabs/gcode-containers": "0.18.0",
+    "@chestnutlabs/gcode-renderer-three": "0.18.0",
+    "@chestnutlabs/toolpath-core": "0.18.0"
   },
   "devDependencies": {
     "@types/three": "0.178.0"
diff --git a/packages/gcode-parser/CHANGELOG.md b/packages/gcode-parser/CHANGELOG.md
index b8e912ce..fa0a7bb3 100644
--- a/packages/gcode-parser/CHANGELOG.md
+++ b/packages/gcode-parser/CHANGELOG.md
@@ -1,5 +1,99 @@
 # @chestnutlabs/gcode-parser
 
+## 0.18.0
+
+### Minor Changes
+
+- [#410](https://github.com/ChestnutLabs/gcode-preview/pull/410) [`5144890`](https://github.com/ChestnutLabs/gcode-preview/commit/51448906f87ca09f3ed11f1286f7b79356110a83) Thanks [@sobechestnut-dev](https://github.com/sobechestnut-dev)! - feat(parser): RS274NGC parameters + expressions (DD-017 Phase 1, [#189](https://github.com/ChestnutLabs/gcode-preview/issues/189) phase 7)
+
+  The parser now understands the RS274NGC _programming_ layer that FDM slicers never use but CAM /
+  LinuxCNC output routinely does: numbered/named/global parameters (`[#100](https://github.com/ChestnutLabs/gcode-preview/issues/100)`, `#<name>`, `#<_global>`),
+  assignment (`#n = <expr>`), and bracket expressions (`[ … ]`) usable wherever a numeric word value is
+  expected (`X[[#1](https://github.com/ChestnutLabs/gcode-preview/issues/1)+2]`, `F[#feed]`, `Z#<depth>`). Previously these were silently dropped, so parametric
+  programs rendered honest-but-**empty**; they now resolve to real geometry.
+
+  A new self-contained module (`rs274.ts`) provides a pure recursive-descent evaluator — the RS274NGC
+  operator + function set with correct precedence (`**` > `*/MOD` > `+-` > comparisons > logical),
+  **degree**-based trig, LinuxCNC `MOD`/`EQ` semantics, `FIX`/`FUP`/`ROUND`, indirect `##n` and computed
+  `#[expr]` references, and a read-only system-parameter allow-list (`[#5420](https://github.com/ChestnutLabs/gcode-preview/issues/5420)–[#5422](https://github.com/ChestnutLabs/gcode-preview/issues/5422)` = current position).
+  It is bounded and safe: a depth guard on nested brackets, **no `eval`/`Function`**, and a capped
+  parameter store, so a hostile program can waste only bounded CPU. Malformed input never throws out of
+  the parse — the offending word is dropped with a specific disclosure (`rs274-bad-expression`,
+  `rs274-uninitialized-param`, `rs274-unsupported-sysparam`) and parsing continues.
+
+  Honest and additive: a new `parametricProgram` capability (`known` when executed, `unavailable`
+  otherwise). Engaged only on lines that use `#`/`[` — every FDM and simple-CNC line takes the untouched
+  lexer and is **byte-identical** (native goldens regenerated for the additive capability key only; the
+  detection gate adds ~2.7% to a large FDM parse, geometry unchanged).
+
+  **Scope: Phase 1 (parameters + expressions) only.** O-word control flow (`if`/`while`/`sub`/`call`) is a
+  later phase and is not yet supported — such constructs are ignored (and will be disclosed) for now.
+
+- [#413](https://github.com/ChestnutLabs/gcode-preview/pull/413) [`bcb4b78`](https://github.com/ChestnutLabs/gcode-preview/commit/bcb4b786fcfc6a2e967d8bfff1d4fd3a06731681) Thanks [@sobechestnut-dev](https://github.com/sobechestnut-dev)! - feat(parser): RS274NGC O-word control flow (DD-017 Phase 2, [#189](https://github.com/ChestnutLabs/gcode-preview/issues/189) phase 7)
+
+  Building on Phase 1's parameters + expressions, the parser now **executes** the RS274NGC O-word control
+  structures that CAM / LinuxCNC programs use to generate geometry: `if`/`elseif`/`else`/`endif`,
+  `while`/`endwhile`, `do`/`while`, `repeat`/`endrepeat`, and `break`/`continue`. A bolt-circle written as
+  a `while` loop over a computed angle, a pocket cut by a `repeat`, an `if` that selects a tool path —
+  these previously ran once (or not at all) because the parser is forward-only; they now resolve to the
+  full, correct toolpath.
+
+  A new module (`rs274-flow.ts`) is the program-buffered interpreter of DD-017 D1: engaged **only** when a
+  program actually contains an O-word control line (a cheap detection scan), it buffers the program, builds
+  a block tree, and executes it — feeding every non-control line back through the same engine so
+  geometry/params/expressions stay on one code path. Loops evaluate their conditions/counts against the
+  same shared parameter store, so `#<i> = [#<i> + 1]` inside a loop body does what you expect.
+
+  **Bounded and safe (this is now a small interpreter).** A new `maxProgramIterations` limit (default
+  `1_000_000`) bounds **total loop work** — charged per loop pass _and_ per statement executed inside a
+  loop body, so a large body cannot multiply the real work past the cap — and stops a runaway `o while [1]`
+  with a partial result and a `rs274-iteration-limit` disclosure. Structural nesting is capped; loops are
+  ordinary iteration, not recursion, so an adversarial program can waste only bounded CPU — it cannot hang,
+  blow the stack, or OOM the worker. There is no `eval` and no I/O.
+
+  **Honest and additive.** Clean flow keeps `parametricProgram: 'known'`; a degraded run (a hit iteration
+  cap, an unbalanced or unsupported O-word, or a malformed condition) reports `'approximated'` and always
+  emits a specific disclosure — never silently wrong. Subroutines (`sub`/`call`/`return`) are a later phase
+  and are explicitly disclosed as unsupported and **not** executed inline. Non-parametric input never
+  enters the interpreter and stays **byte-identical** (both golden suites unchanged). Streaming input, which
+  cannot re-run a line range from a partial stream, discloses and runs linearly.
+
+- [#415](https://github.com/ChestnutLabs/gcode-preview/pull/415) [`dc89056`](https://github.com/ChestnutLabs/gcode-preview/commit/dc890568d45e59635b9994d8409ef6cdc0847f80) Thanks [@sobechestnut-dev](https://github.com/sobechestnut-dev)! - feat(parser): RS274NGC subroutines (DD-017 Phase 3, [#189](https://github.com/ChestnutLabs/gcode-preview/issues/189) phase 7)
+
+  Completes the RS274NGC programming layer: the parser now executes in-file O-word **subroutines** —
+  `o<id> sub`/`endsub`, `o<id> call [args]`, and `o<id> return`. A `call` binds its arguments to `[#1](https://github.com/ChestnutLabs/gcode-preview/issues/1)`..`[#30](https://github.com/ChestnutLabs/gcode-preview/issues/30)`
+  in a fresh call frame, runs the named sub's body, and returns; `return` exits early. Subroutines may be
+  forward-referenced (a `call` before the `sub` that defines it) and may recurse. This is how CAM/LinuxCNC
+  programs factor repeated geometry (a "stamp" drilled at many positions, a parametric feature reused
+  across a part).
+
+  **Correct scoping (recursion-safe).** Numbered parameters `[#1](https://github.com/ChestnutLabs/gcode-preview/issues/1)`..`[#30](https://github.com/ChestnutLabs/gcode-preview/issues/30)` and non-underscore named parameters
+  (`#<local>`) are LOCAL to each call frame; `[#31](https://github.com/ChestnutLabs/gcode-preview/issues/31)`+ and underscore-named (`#<_global>`) are shared globals —
+  matching LinuxCNC. A recursive sub's `[#1](https://github.com/ChestnutLabs/gcode-preview/issues/1)` therefore cannot clobber its caller's, and a sub's locals do not
+  leak out. The main program runs in the base scope, so a program that uses no subroutines behaves exactly
+  as before (byte-identical; both golden suites unchanged).
+
+  **Bounded and safe.** A new `maxCallDepth` limit (default `50`) caps subroutine recursion — an unbounded
+  or mutually-recursive `call` is disclosed (`rs274-call-depth`) and skipped, never a stack overflow. A
+  runtime execution-depth backstop additionally bounds the combined structural-nesting + call-depth JS
+  recursion. A sub called inside a loop still charges its body work against `maxProgramIterations`, so a huge
+  sub body cannot multiply work past the cap. `break`/`continue`/`return` are frame-local — they never jump
+  across a call boundary.
+
+  **Honest.** Clean subroutine execution keeps `parametricProgram: 'known'`; a degraded run (unknown sub,
+  recursion-limit hit, duplicate definition, misplaced `return`) reports `'approximated'` with a specific
+  disclosure — never silently wrong. Subroutine return VALUES are not yet propagated to the caller (a
+  documented Phase-3 limitation; `return` acts as an early exit). External subroutine files (`M98`,
+  `o<name> call` resolving to a separate `.ngc`) remain an explicit non-goal (no I/O in the parser).
+
+### Patch Changes
+
+- Updated dependencies []:
+  - @chestnutlabs/gcode-bgcode@0.18.0
+  - @chestnutlabs/gcode-containers@0.18.0
+  - @chestnutlabs/gcode-dialects@0.18.0
+  - @chestnutlabs/toolpath-core@0.18.0
+
 ## 0.17.0
 
 ### Minor Changes
diff --git a/packages/gcode-parser/package.json b/packages/gcode-parser/package.json
index a46df773..a4c7a7ec 100644
--- a/packages/gcode-parser/package.json
+++ b/packages/gcode-parser/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@chestnutlabs/gcode-parser",
-  "version": "0.17.0",
+  "version": "0.18.0",
   "description": "Worker-safe G-code parse core producing ToolpathIR (DD-003).",
   "keywords": [
     "gcode",
@@ -49,9 +49,9 @@
     "test": "vitest run"
   },
   "dependencies": {
-    "@chestnutlabs/toolpath-core": "0.17.0",
-    "@chestnutlabs/gcode-dialects": "0.17.0",
-    "@chestnutlabs/gcode-containers": "0.17.0",
-    "@chestnutlabs/gcode-bgcode": "0.17.0"
+    "@chestnutlabs/toolpath-core": "0.18.0",
+    "@chestnutlabs/gcode-dialects": "0.18.0",
+    "@chestnutlabs/gcode-containers": "0.18.0",
+    "@chestnutlabs/gcode-bgcode": "0.18.0"
   }
 }
diff --git a/packages/gcode-preview-core/CHANGELOG.md b/packages/gcode-preview-core/CHANGELOG.md
index f7db19ff..59cddf00 100644
--- a/packages/gcode-preview-core/CHANGELOG.md
+++ b/packages/gcode-preview-core/CHANGELOG.md
@@ -1,5 +1,43 @@
 # @chestnutlabs/gcode-preview-core
 
+## 0.18.0
+
+### Minor Changes
+
+- [#418](https://github.com/ChestnutLabs/gcode-preview/pull/418) [`c950339`](https://github.com/ChestnutLabs/gcode-preview/commit/c95033908e3ebaeb07b6f7e6f2487672dcc463f0) Thanks [@sobechestnut-dev](https://github.com/sobechestnut-dev)! - feat(renderer): interactive view capture() → Blob (DD-030 D1)
+
+  The interactive viewer can now hand back **what is on screen right now** as an image `Blob` — for a
+  user-selected thumbnail, a large-file thumbnail fallback, or a screenshot. New `capture(opts?)` where
+  `opts` is `{ width?, height?, format?, quality?, background? }` (all optional; defaults match the live
+  view).
+
+  Available on every interactive surface: `GcodePreviewControls.capture()` (so the Vue, React, Svelte, and
+  Web-Component adapters all inherit it — the Web Component also exposes an imperative `capture()` method),
+  and `ModelViewer.capture()` on the model-viewer handle. The toolpath `ToolpathRenderer` and the shared
+  `InteractiveStage` carry the implementation.
+
+  **Mechanism (render-to-target).** Capture renders the current scene + active camera into an off-screen
+  `WebGLRenderTarget` at the requested size and reads it back, rather than flipping the interactive
+  context's `preserveDrawingBuffer` (which would tax every interactive frame). That gives an arbitrary
+  output size and an independent/transparent background **without** disturbing the live view, and reuses the
+  headless still path's "single render, then read pixels" recipe. The thumbnail is framed at its own aspect
+  so it isn't distorted; the live view is repainted afterward. The library returns the `Blob` and **never**
+  triggers a download — the caller owns the pixels (same contract as `renderStill`).
+
+  **Honest.** When the renderer cannot render-to-target (the 2D renderer, a stub GL / no WebGL) or the stage
+  is disposed / its context is lost, `capture()` rejects with a typed `CaptureUnsupportedError`
+  (`code: 'E_CAPTURE_UNSUPPORTED'`) — never fabricated output. Purely additive (a new optional method on the
+  renderer contract; no existing signature changed). Final increment of the DD-030 renderer/viewer
+  interoperability batch (bed + per-plate scope + capture).
+
+### Patch Changes
+
+- Updated dependencies [[`5144890`](https://github.com/ChestnutLabs/gcode-preview/commit/51448906f87ca09f3ed11f1286f7b79356110a83), [`bcb4b78`](https://github.com/ChestnutLabs/gcode-preview/commit/bcb4b786fcfc6a2e967d8bfff1d4fd3a06731681), [`dc89056`](https://github.com/ChestnutLabs/gcode-preview/commit/dc890568d45e59635b9994d8409ef6cdc0847f80), [`0ebeadf`](https://github.com/ChestnutLabs/gcode-preview/commit/0ebeadfa839e52baf243ef07b5807f3974bbac7e), [`c950339`](https://github.com/ChestnutLabs/gcode-preview/commit/c95033908e3ebaeb07b6f7e6f2487672dcc463f0)]:
+  - @chestnutlabs/gcode-parser@0.18.0
+  - @chestnutlabs/gcode-renderer-three@0.18.0
+  - @chestnutlabs/gcode-renderer-2d@0.18.0
+  - @chestnutlabs/toolpath-core@0.18.0
+
 ## 0.17.0
 
 ### Minor Changes
diff --git a/packages/gcode-preview-core/package.json b/packages/gcode-preview-core/package.json
index 39272890..79f867b0 100644
--- a/packages/gcode-preview-core/package.json
+++ b/packages/gcode-preview-core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@chestnutlabs/gcode-preview-core",
-  "version": "0.17.0",
+  "version": "0.18.0",
   "description": "Framework-neutral preview controller for the Chestnut Labs G-code viewer (DD-007 §4.6): the shared engine glue, state model, and TypeScript contracts beneath the Vue/React/Svelte adapters.",
   "keywords": [
     "gcode",
@@ -52,9 +52,9 @@
     "test": "vitest run"
   },
   "dependencies": {
-    "@chestnutlabs/gcode-parser": "0.17.0",
-    "@chestnutlabs/gcode-renderer-2d": "0.17.0",
-    "@chestnutlabs/gcode-renderer-three": "0.17.0",
-    "@chestnutlabs/toolpath-core": "0.17.0"
+    "@chestnutlabs/gcode-parser": "0.18.0",
+    "@chestnutlabs/gcode-renderer-2d": "0.18.0",
+    "@chestnutlabs/gcode-renderer-three": "0.18.0",
+    "@chestnutlabs/toolpath-core": "0.18.0"
   }
 }
diff --git a/packages/gcode-preview-element/CHANGELOG.md b/packages/gcode-preview-element/CHANGELOG.md
index dccd4982..33ea7409 100644
--- a/packages/gcode-preview-element/CHANGELOG.md
+++ b/packages/gcode-preview-element/CHANGELOG.md
@@ -1,5 +1,43 @@
 # @chestnutlabs/gcode-preview-element
 
+## 0.18.0
+
+### Minor Changes
+
+- [#418](https://github.com/ChestnutLabs/gcode-preview/pull/418) [`c950339`](https://github.com/ChestnutLabs/gcode-preview/commit/c95033908e3ebaeb07b6f7e6f2487672dcc463f0) Thanks [@sobechestnut-dev](https://github.com/sobechestnut-dev)! - feat(renderer): interactive view capture() → Blob (DD-030 D1)
+
+  The interactive viewer can now hand back **what is on screen right now** as an image `Blob` — for a
+  user-selected thumbnail, a large-file thumbnail fallback, or a screenshot. New `capture(opts?)` where
+  `opts` is `{ width?, height?, format?, quality?, background? }` (all optional; defaults match the live
+  view).
+
+  Available on every interactive surface: `GcodePreviewControls.capture()` (so the Vue, React, Svelte, and
+  Web-Component adapters all inherit it — the Web Component also exposes an imperative `capture()` method),
+  and `ModelViewer.capture()` on the model-viewer handle. The toolpath `ToolpathRenderer` and the shared
+  `InteractiveStage` carry the implementation.
+
+  **Mechanism (render-to-target).** Capture renders the current scene + active camera into an off-screen
+  `WebGLRenderTarget` at the requested size and reads it back, rather than flipping the interactive
+  context's `preserveDrawingBuffer` (which would tax every interactive frame). That gives an arbitrary
+  output size and an independent/transparent background **without** disturbing the live view, and reuses the
+  headless still path's "single render, then read pixels" recipe. The thumbnail is framed at its own aspect
+  so it isn't distorted; the live view is repainted afterward. The library returns the `Blob` and **never**
+  triggers a download — the caller owns the pixels (same contract as `renderStill`).
+
+  **Honest.** When the renderer cannot render-to-target (the 2D renderer, a stub GL / no WebGL) or the stage
+  is disposed / its context is lost, `capture()` rejects with a typed `CaptureUnsupportedError`
+  (`code: 'E_CAPTURE_UNSUPPORTED'`) — never fabricated output. Purely additive (a new optional method on the
+  renderer contract; no existing signature changed). Final increment of the DD-030 renderer/viewer
+  interoperability batch (bed + per-plate scope + capture).
+
+### Patch Changes
+
+- Updated dependencies [[`5144890`](https://github.com/ChestnutLabs/gcode-preview/commit/51448906f87ca09f3ed11f1286f7b79356110a83), [`bcb4b78`](https://github.com/ChestnutLabs/gcode-preview/commit/bcb4b786fcfc6a2e967d8bfff1d4fd3a06731681), [`dc89056`](https://github.com/ChestnutLabs/gcode-preview/commit/dc890568d45e59635b9994d8409ef6cdc0847f80), [`0ebeadf`](https://github.com/ChestnutLabs/gcode-preview/commit/0ebeadfa839e52baf243ef07b5807f3974bbac7e), [`c950339`](https://github.com/ChestnutLabs/gcode-preview/commit/c95033908e3ebaeb07b6f7e6f2487672dcc463f0)]:
+  - @chestnutlabs/gcode-parser@0.18.0
+  - @chestnutlabs/gcode-renderer-three@0.18.0
+  - @chestnutlabs/gcode-preview-core@0.18.0
+  - @chestnutlabs/toolpath-core@0.18.0
+
 ## 0.17.0
 
 ### Patch Changes
diff --git a/packages/gcode-preview-element/package.json b/packages/gcode-preview-element/package.json
index cbeb2906..5b1af563 100644
--- a/packages/gcode-preview-element/package.json
+++ b/packages/gcode-preview-element/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@chestnutlabs/gcode-preview-element",
-  "version": "0.17.0",
+  "version": "0.18.0",
   "description": "Framework-free <gcode-preview> Web Component for the Chestnut Labs G-code viewer (DD-007 D1 / DD-009 D5): a custom element bridging @chestnutlabs/gcode-preview-core, no framework peer dependency.",
   "keywords": [
     "gcode",
@@ -52,9 +52,9 @@
     "test": "vitest run"
   },
   "dependencies": {
-    "@chestnutlabs/gcode-parser": "0.17.0",
-    "@chestnutlabs/gcode-preview-core": "0.17.0",
-    "@chestnutlabs/gcode-renderer-three": "0.17.0",
-    "@chestnutlabs/toolpath-core": "0.17.0"
+    "@chestnutlabs/gcode-parser": "0.18.0",
+    "@chestnutlabs/gcode-preview-core": "0.18.0",
+    "@chestnutlabs/gcode-renderer-three": "0.18.0",
+    "@chestnutlabs/toolpath-core": "0.18.0"
   }
 }
diff --git a/packages/gcode-preview-react/CHANGELOG.md b/packages/gcode-preview-react/CHANGELOG.md
index b5474797..ad5cc244 100644
--- a/packages/gcode-preview-react/CHANGELOG.md
+++ b/packages/gcode-preview-react/CHANGELOG.md
@@ -1,5 +1,15 @@
 # @chestnutlabs/gcode-preview-react
 
+## 0.18.0
+
+### Patch Changes
+
+- Updated dependencies [[`5144890`](https://github.com/ChestnutLabs/gcode-preview/commit/51448906f87ca09f3ed11f1286f7b79356110a83), [`bcb4b78`](https://github.com/ChestnutLabs/gcode-preview/commit/bcb4b786fcfc6a2e967d8bfff1d4fd3a06731681), [`dc89056`](https://github.com/ChestnutLabs/gcode-preview/commit/dc890568d45e59635b9994d8409ef6cdc0847f80), [`0ebeadf`](https://github.com/ChestnutLabs/gcode-preview/commit/0ebeadfa839e52baf243ef07b5807f3974bbac7e), [`c950339`](https://github.com/ChestnutLabs/gcode-preview/commit/c95033908e3ebaeb07b6f7e6f2487672dcc463f0)]:
+  - @chestnutlabs/gcode-parser@0.18.0
+  - @chestnutlabs/gcode-renderer-three@0.18.0
+  - @chestnutlabs/gcode-preview-core@0.18.0
+  - @chestnutlabs/toolpath-core@0.18.0
+
 ## 0.17.0
 
 ### Patch Changes
diff --git a/packages/gcode-preview-react/package.json b/packages/gcode-preview-react/package.json
index cdb75633..e94aa10d 100644
--- a/packages/gcode-preview-react/package.json
+++ b/packages/gcode-preview-react/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@chestnutlabs/gcode-preview-react",
-  "version": "0.17.0",
+  "version": "0.18.0",
   "description": "Thin React integration for the Chestnut Labs G-code viewer (DD-007 D1 amendment): useGcodePreview hook + GcodePreview component as a reactivity bridge over @chestnutlabs/gcode-preview-core.",
   "keywords": [
     "gcode",
@@ -49,10 +49,10 @@
     "test": "vitest run"
   },
   "dependencies": {
-    "@chestnutlabs/gcode-parser": "0.17.0",
-    "@chestnutlabs/gcode-preview-core": "0.17.0",
-    "@chestnutlabs/gcode-renderer-three": "0.17.0",
-    "@chestnutlabs/toolpath-core": "0.17.0"
+    "@chestnutlabs/gcode-parser": "0.18.0",
+    "@chestnutlabs/gcode-preview-core": "0.18.0",
+    "@chestnutlabs/gcode-renderer-three": "0.18.0",
+    "@chestnutlabs/toolpath-core": "0.18.0"
   },
   "peerDependencies": {
     "react": "^18.0.0 || ^19.0.0"
diff --git a/packages/gcode-preview-svelte/CHANGELOG.md b/packages/gcode-preview-svelte/CHANGELOG.md
index 91539685..100b9a6c 100644
--- a/packages/gcode-preview-svelte/CHANGELOG.md
+++ b/packages/gcode-preview-svelte/CHANGELOG.md
@@ -1,5 +1,15 @@
 # @chestnutlabs/gcode-preview-svelte
 
+## 0.18.0
+
+### Patch Changes
+
+- Updated dependencies [[`5144890`](https://github.com/ChestnutLabs/gcode-preview/commit/51448906f87ca09f3ed11f1286f7b79356110a83), [`bcb4b78`](https://github.com/ChestnutLabs/gcode-preview/commit/bcb4b786fcfc6a2e967d8bfff1d4fd3a06731681), [`dc89056`](https://github.com/ChestnutLabs/gcode-preview/commit/dc890568d45e59635b9994d8409ef6cdc0847f80), [`0ebeadf`](https://github.com/ChestnutLabs/gcode-preview/commit/0ebeadfa839e52baf243ef07b5807f3974bbac7e), [`c950339`](https://github.com/ChestnutLabs/gcode-preview/commit/c95033908e3ebaeb07b6f7e6f2487672dcc463f0)]:
+  - @chestnutlabs/gcode-parser@0.18.0
+  - @chestnutlabs/gcode-renderer-three@0.18.0
+  - @chestnutlabs/gcode-preview-core@0.18.0
+  - @chestnutlabs/toolpath-core@0.18.0
+
 ## 0.17.0
 
 ### Patch Changes
diff --git a/packages/gcode-preview-svelte/package.json b/packages/gcode-preview-svelte/package.json
index e06d6614..e7e45b18 100644
--- a/packages/gcode-preview-svelte/package.json
+++ b/packages/gcode-preview-svelte/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@chestnutlabs/gcode-preview-svelte",
-  "version": "0.17.0",
+  "version": "0.18.0",
   "description": "Thin Svelte integration for the Chestnut Labs G-code viewer (DD-007 D1 amendment): createGcodePreview store/action API + GcodePreview component as a reactivity bridge over @chestnutlabs/gcode-preview-core.",
   "keywords": [
     "gcode",
@@ -55,10 +55,10 @@
     "test": "vitest run"
   },
   "dependencies": {
-    "@chestnutlabs/gcode-parser": "0.17.0",
-    "@chestnutlabs/gcode-preview-core": "0.17.0",
-    "@chestnutlabs/gcode-renderer-three": "0.17.0",
-    "@chestnutlabs/toolpath-core": "0.17.0"
+    "@chestnutlabs/gcode-parser": "0.18.0",
+    "@chestnutlabs/gcode-preview-core": "0.18.0",
+    "@chestnutlabs/gcode-renderer-three": "0.18.0",
+    "@chestnutlabs/toolpath-core": "0.18.0"
   },
   "peerDependencies": {
     "svelte": "^4.0.0 || ^5.0.0"
diff --git a/packages/gcode-preview-vue/CHANGELOG.md b/packages/gcode-preview-vue/CHANGELOG.md
index 7cdade39..e7dfa91c 100644
--- a/packages/gcode-preview-vue/CHANGELOG.md
+++ b/packages/gcode-preview-vue/CHANGELOG.md
@@ -1,5 +1,15 @@
 # @chestnutlabs/gcode-preview-vue
 
+## 0.18.0
+
+### Patch Changes
+
+- Updated dependencies [[`5144890`](https://github.com/ChestnutLabs/gcode-preview/commit/51448906f87ca09f3ed11f1286f7b79356110a83), [`bcb4b78`](https://github.com/ChestnutLabs/gcode-preview/commit/bcb4b786fcfc6a2e967d8bfff1d4fd3a06731681), [`dc89056`](https://github.com/ChestnutLabs/gcode-preview/commit/dc890568d45e59635b9994d8409ef6cdc0847f80), [`0ebeadf`](https://github.com/ChestnutLabs/gcode-preview/commit/0ebeadfa839e52baf243ef07b5807f3974bbac7e), [`c950339`](https://github.com/ChestnutLabs/gcode-preview/commit/c95033908e3ebaeb07b6f7e6f2487672dcc463f0)]:
+  - @chestnutlabs/gcode-parser@0.18.0
+  - @chestnutlabs/gcode-renderer-three@0.18.0
+  - @chestnutlabs/gcode-preview-core@0.18.0
+  - @chestnutlabs/toolpath-core@0.18.0
+
 ## 0.17.0
 
 ### Patch Changes
diff --git a/packages/gcode-preview-vue/package.json b/packages/gcode-preview-vue/package.json
index c33305fb..fe5475a4 100644
--- a/packages/gcode-preview-vue/package.json
+++ b/packages/gcode-preview-vue/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@chestnutlabs/gcode-preview-vue",
-  "version": "0.17.0",
+  "version": "0.18.0",
   "description": "Thin Vue 3 integration for the Chestnut Labs G-code viewer (DD-007): useGcodePreview composable + GcodePreview component over the framework-neutral parser/renderer/progress packages.",
   "keywords": [
     "gcode",
@@ -50,10 +50,10 @@
     "test": "vitest run"
   },
   "dependencies": {
-    "@chestnutlabs/gcode-parser": "0.17.0",
-    "@chestnutlabs/gcode-renderer-three": "0.17.0",
-    "@chestnutlabs/toolpath-core": "0.17.0",
-    "@chestnutlabs/gcode-preview-core": "0.17.0"
+    "@chestnutlabs/gcode-parser": "0.18.0",
+    "@chestnutlabs/gcode-renderer-three": "0.18.0",
+    "@chestnutlabs/toolpath-core": "0.18.0",
+    "@chestnutlabs/gcode-preview-core": "0.18.0"
   },
   "peerDependencies": {
     "vue": "^3.4.0"
diff --git a/packages/gcode-renderer-2d/CHANGELOG.md b/packages/gcode-renderer-2d/CHANGELOG.md
index 007daab3..afd44607 100644
--- a/packages/gcode-renderer-2d/CHANGELOG.md
+++ b/packages/gcode-renderer-2d/CHANGELOG.md
@@ -1,5 +1,13 @@
 # @chestnutlabs/gcode-renderer-2d
 
+## 0.18.0
+
+### Patch Changes
+
+- Updated dependencies []:
+  - @chestnutlabs/gcode-colors@0.18.0
+  - @chestnutlabs/toolpath-core@0.18.0
+
 ## 0.17.0
 
 ### Patch Changes
diff --git a/packages/gcode-renderer-2d/package.json b/packages/gcode-renderer-2d/package.json
index 1479d4f8..aff7863b 100644
--- a/packages/gcode-renderer-2d/package.json
+++ b/packages/gcode-renderer-2d/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@chestnutlabs/gcode-renderer-2d",
-  "version": "0.17.0",
+  "version": "0.18.0",
   "description": "Low-resource Canvas 2D layer renderer for the Chestnut Labs G-code viewer (DD-014 / E8): an opt-in current/adjacent-layer 2D view over the existing ToolpathIR for low-GPU/low-memory/WebGL-blocked devices. No three, no framework.",
   "keywords": [
     "gcode",
@@ -49,7 +49,7 @@
     "test": "vitest run"
   },
   "dependencies": {
-    "@chestnutlabs/gcode-colors": "0.17.0",
-    "@chestnutlabs/toolpath-core": "0.17.0"
+    "@chestnutlabs/gcode-colors": "0.18.0",
+    "@chestnutlabs/toolpath-core": "0.18.0"
   }
 }
diff --git a/packages/gcode-renderer-three/CHANGELOG.md b/packages/gcode-renderer-three/CHANGELOG.md
index c9bc7c8c..8d4c1d38 100644
--- a/packages/gcode-renderer-three/CHANGELOG.md
+++ b/packages/gcode-renderer-three/CHANGELOG.md
@@ -1,5 +1,61 @@
 # @chestnutlabs/gcode-renderer-three
 
+## 0.18.0
+
+### Minor Changes
+
+- [#416](https://github.com/ChestnutLabs/gcode-preview/pull/416) [`0ebeadf`](https://github.com/ChestnutLabs/gcode-preview/commit/0ebeadfa839e52baf243ef07b5807f3974bbac7e) Thanks [@sobechestnut-dev](https://github.com/sobechestnut-dev)! - feat(renderer): non-rectangular build-bed geometry (DD-030 D3)
+
+  The build volume can now draw an **honest non-rectangular bed** — delta, round, or irregular — instead of
+  only a rectangle. `BuildVolumeDef` gains an optional `shape?: BedShape`
+  (`{kind:'rect'} | {kind:'circular', center, diameter} | {kind:'polygon', points}`): a circle is
+  polygonized, the outline is filled and drawn, and the floor grid is **clipped to the outline** so the
+  printable area reads correctly (a round bed is no longer a square with a circle floating over it). The
+  `mesh` escape hatch for a fully custom bed mesh is reserved for a later phase.
+
+  `machineToVolume()` now maps a discovered `MachineGeometry.bed` of kind `circular`/`polygon` onto that
+  `shape`, so a **discovered** round/delta bed renders as its true outline instead of being collapsed to its
+  bounding rectangle (a visible improvement for delta/round printers). Callers supply the shape (from a
+  machine profile, a config, wherever); the renderer just draws the polygon — no profile parsing in the
+  library, no vendor semantics baked in.
+
+  Additive and safe: a bed with no `shape` (or `{kind:'rect'}`) takes the original rectangular path and is
+  **byte-identical** — the rectangular grid, plate, cage, excluded-region outlines, and origin tripod are
+  unchanged. The volume cage stays a bounding box (the bed outline carries the shape). First increment of
+  the DD-030 renderer/viewer interoperability batch.
+
+- [#418](https://github.com/ChestnutLabs/gcode-preview/pull/418) [`c950339`](https://github.com/ChestnutLabs/gcode-preview/commit/c95033908e3ebaeb07b6f7e6f2487672dcc463f0) Thanks [@sobechestnut-dev](https://github.com/sobechestnut-dev)! - feat(renderer): interactive view capture() → Blob (DD-030 D1)
+
+  The interactive viewer can now hand back **what is on screen right now** as an image `Blob` — for a
+  user-selected thumbnail, a large-file thumbnail fallback, or a screenshot. New `capture(opts?)` where
+  `opts` is `{ width?, height?, format?, quality?, background? }` (all optional; defaults match the live
+  view).
+
+  Available on every interactive surface: `GcodePreviewControls.capture()` (so the Vue, React, Svelte, and
+  Web-Component adapters all inherit it — the Web Component also exposes an imperative `capture()` method),
+  and `ModelViewer.capture()` on the model-viewer handle. The toolpath `ToolpathRenderer` and the shared
+  `InteractiveStage` carry the implementation.
+
+  **Mechanism (render-to-target).** Capture renders the current scene + active camera into an off-screen
+  `WebGLRenderTarget` at the requested size and reads it back, rather than flipping the interactive
+  context's `preserveDrawingBuffer` (which would tax every interactive frame). That gives an arbitrary
+  output size and an independent/transparent background **without** disturbing the live view, and reuses the
+  headless still path's "single render, then read pixels" recipe. The thumbnail is framed at its own aspect
+  so it isn't distorted; the live view is repainted afterward. The library returns the `Blob` and **never**
+  triggers a download — the caller owns the pixels (same contract as `renderStill`).
+
+  **Honest.** When the renderer cannot render-to-target (the 2D renderer, a stub GL / no WebGL) or the stage
+  is disposed / its context is lost, `capture()` rejects with a typed `CaptureUnsupportedError`
+  (`code: 'E_CAPTURE_UNSUPPORTED'`) — never fabricated output. Purely additive (a new optional method on the
+  renderer contract; no existing signature changed). Final increment of the DD-030 renderer/viewer
+  interoperability batch (bed + per-plate scope + capture).
+
+### Patch Changes
+
+- Updated dependencies []:
+  - @chestnutlabs/gcode-colors@0.18.0
+  - @chestnutlabs/toolpath-core@0.18.0
+
 ## 0.17.0
 
 ### Minor Changes
diff --git a/packages/gcode-renderer-three/package.json b/packages/gcode-renderer-three/package.json
index 9b734a87..90b6a740 100644
--- a/packages/gcode-renderer-three/package.json
+++ b/packages/gcode-renderer-three/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@chestnutlabs/gcode-renderer-three",
-  "version": "0.17.0",
+  "version": "0.18.0",
   "description": "Three.js toolpath renderer consuming ToolpathIR (DD-004). Phases 1-2: geometry builders + scene/lifecycle.",
   "keywords": [
     "gcode",
@@ -49,8 +49,8 @@
     "test": "vitest run"
   },
   "dependencies": {
-    "@chestnutlabs/gcode-colors": "0.17.0",
-    "@chestnutlabs/toolpath-core": "0.17.0"
+    "@chestnutlabs/gcode-colors": "0.18.0",
+    "@chestnutlabs/toolpath-core": "0.18.0"
   },
   "devDependencies": {
     "@types/three": "0.178.0"
diff --git a/packages/toolpath-core/CHANGELOG.md b/packages/toolpath-core/CHANGELOG.md
index 7470e41c..ebc482a1 100644
--- a/packages/toolpath-core/CHANGELOG.md
+++ b/packages/toolpath-core/CHANGELOG.md
@@ -1,5 +1,7 @@
 # @chestnutlabs/toolpath-core
 
+## 0.18.0
+
 ## 0.17.0
 
 ### Minor Changes
diff --git a/packages/toolpath-core/package.json b/packages/toolpath-core/package.json
index 66011c5d..7e8414ee 100644
--- a/packages/toolpath-core/package.json
+++ b/packages/toolpath-core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@chestnutlabs/toolpath-core",
-  "version": "0.17.0",
+  "version": "0.18.0",
   "description": "Neutral ToolpathIR and capability model for the Chestnut Labs G-code Preview toolpath stack.",
   "keywords": [
     "gcode",