# M16-GAP-00018 Status

status: done
task: ParticleSettings data-block LOCAL_EXACT slice
updated: 2026-08-19 America/New_York

scope: Blender 5.2 ParticleSettings identity and bounded emission fields: type, source, distribution, physics, count, frame range, lifetime, particle size and draw size.

evidence:

- `tools/web/generated/M16-GAP-00018.py` generated a minimal retained `WebGapParticleSettings` data-block without a particle-system modifier, avoiding unrelated modifier state while preserving the exact RNA data.
- Desktop report reopened after save and matched exactly: emitter type, face source, JIT distribution, Newton physics, 128 particles, frames 4-96, lifetime 32, size 0.125 and draw size 0.25.
- The Blend reader now exports `ParticleSettings` blocks into SceneIR; WASM/Main opened the same fixture and matched every bounded field. Save/reopen matched the full ParticleSettings snapshot exactly.
- A truncated malformed Blend submitted to an already loaded Main was rejected and the original snapshot remained unchanged.
- `build_blender_5.2.0/bin/blender -b --factory-startup --python tools/web/generated/M16-GAP-00018.py -- tests/files/web/generated/M16-GAP-00018-datablock-ParticleSettings.blend` exited 0.
- `npm --prefix web run test:generated-gap -- --task M16-GAP-00018` exited 0.
- `node tools/web/check-generated-gap.mjs --task M16-GAP-00018` exited 0.

artifacts: `tests/golden/M16-GAP-00018/manifest.json` contains SHA-256 for the parent manifest, fixture, generator, desktop/Web checkers, reader/API/protocol/runtime and both reports.

knownRisk: This closes one `datablock:ParticleSettings` observability slice only. Particle-system modifiers, particle simulation, operators and all other generated gaps remain separate tasks.

rollback: remove this task's fixture, generator, checker branch, reports, manifest, status and context; restore `M16-GAP-00017` as the queue tail without editing its successful evidence.

nextTask: `M16-GAP-00019`