Replacement side/top enclosure for a Dell Precision Tower 7810 that has been modified for oversized, high-power GPU use. The target part is a manufacturable third-party sheet-metal assembly that restores enclosure safety, improves dust control, preserves serviceability where practical, and supports external or elevated PSU integration plus large cable pass-through features.

This repository is intentionally measurement-first. Until the OEM interfaces and GPU/PSU clearances are captured, the CAD here should be treated as scaffolding and process structure, not final geometry.

The repo now also carries the host-specific honey platform lane where Dell 7810 power/reset behavior, low-latency validation, and enclosure decisions overlap. The boundary is: workstation-specific hardware behavior belongs here, while compositor and XR application validation stay in XoxdWM.

This is the public-facing default branch of the Dell-7810 host evidence repo. It carries sanitized summaries, derived CSVs, publication figures, and operator-target-driven scripts. It does not carry raw data/captures/honey/ operator artifacts; those live in a separate private evidence archive and are referenced by sanitized summary in docs/.

Public readers should treat checked-in result notes, derived CSVs, and publication figures as the intended evidence surface. Anything not on this branch is intentionally out of scope for public reproduction.

For the artifact policy and candidate-branch shape that produced this surface, see docs/tracking/public-artifact-policy-2026-04-26.md and docs/tracking/public-candidate-branch-plan-2026-04-28.md. For the validation gates this branch passed before public visibility, see docs/tracking/public-readiness-audit-2026-04-26.md and docs/tracking/public-branch-exposure-audit-2026-04-28.md.

Cacheable Chapel and kernel CI are being converged onto the shared GloriousFlywheel tinyland-nix capability-class contract. Dell-7810 cannot yet truthfully reach that shared lane, so the cacheable CI path is not live for this repo today. Live GitHub inventory currently shows zero accessible self-hosted runners for this repo. Direct honey evidence remains a separate host-truth lane, not the normal CI authority surface.

The current GloriousFlywheel boundary is strict: because this repo lives under a personal GitHub account, repo-scoped ARC anchors would be compatibility debt, not shared pooled-runner authority. The clean cacheable-CI exits are an org/enterprise shared scope, an intentional mirror or owner-boundary move, or an explicit blocked state.

• Replace the removed OEM hinged side entry with a rigid "top-hat" or tent-style enclosure.
• Create enough vertical and lateral volume for large multi-slot GPUs and their cable exits.
• Provide a mounting strategy for an elevated or external-adjacent modular PSU.
• Add a large cable pass-through feature sized for GPU power harnesses and other external peripherals.
• Reuse the OEM lower tongue/groove pattern and quick-release latch if the geometry proves repeatable and robust.
• Generate fabrication outputs for laser-cut and bent sheet parts plus 3D-printed fit-check coupons.

• OpenSCAD is the source of truth for parametric geometry.
• FreeCAD is a support tool for inspection, import/export, and drawing workflows, not a competing geometry source.
• Every interface that touches the Dell chassis gets validated with a printed coupon before it reaches a full metal prototype.
• Fabrication outputs are generated, not hand-edited.

• Case work: capture the OEM interfaces, GPU envelope, cable bundle, and installation path well enough to replace placeholder coupons with real fit-check artifacts.
• Platform work: capture honey power/reset behavior, establish a repeatable reset matrix, and bring Dell-7810-specific RT/NUMA validation tooling into this repo.

This repo focuses on Dell 7810 platform characterization, enclosure design, power/reset behavior, and host validation. XR/VR compositor and application work using this platform lives in Jesssullivan/XoxdWM.

For the explicit ownership boundary between repos, see docs/platform/xoxdwm-boundary-audit.md and docs/platform/authority-map.md. For the new declarative host-contract lane, see docs/platform/declarative-host-contract.md. For the current "measured versus scaffolded" state, see docs/tracking/measured-evidence-map.md.

• docs/epic-plan.md: milestone plan, decision gates, and deliverables.
• docs/architecture/: concept selection and CAD workflow guidance.
• docs/platform/: Dell 7810 host-platform scope, extraction plan, and RT/NUMA lane notes.
• docs/platform/honey-bios-cstates-and-linux-xr-runbook-2026-04-22.md: current Dell-owned BIOS A34, C-state, and linux-xr run order for honey.
• docs/platform/honey-kernel-posture-cross-repo-audit-2026-04-22.md: cross-repo audit separating installed RT artifacts, active RT boot, and validated low-latency host posture.
• docs/platform/chapel-live-host-result-template.md: template for the first Dell-owned live Chapel host result under TIN-470.
• docs/publication/: paper and presentation framing notes plus claim boundaries.
• docs/measurements/measurement-plan.md: measurement workflow and datum strategy.
• docs/measurements/measurement-log-template.md: capture sheet for repeated measurements.
• docs/measurements/bench-session-01.md: ordered first measurement session.
• docs/measurements/honey-bench-packet.md: combined bench-day packet for Session 01 plus stock fan inventory capture on honey.
• docs/measurements/session-01-execution-packet.md: short bench packet for TIN-469.
• docs/measurements/session-01-result-template.md: short result-note template for the first evidence-backed Session 01 pass.
• docs/measurements/printable-coupon-matrix.md: Session 01 feature-to-parameter-to-coupon map.
• docs/measurements/t7810-fan-support-matrix.md: candidate replacement support matrix for stock and aftermarket fan validation.
• docs/measurements/t7810-fan-noise-study-lite.md: optional lightweight REW / mic method for fan noise comparison after support gates pass.
• docs/measurements/cad-handoff-checklist.md: what measurements are sufficient to unlock each CAD task.
• docs/measurements/photo-shot-list.md: required photo record for each bench session.
• docs/measurements/case-work-todo.md: current measurement and printable gaps blocking real coupon work.
• docs/research/extant-art.md: current external references and candidate hardware families.
• docs/research/t7810-fan-and-airflow-prior-art-2026-04-22.md: stock Dell fan behavior, external front-fan replacement constraints, and aftermarket PWM candidate prior art.
• docs/research/honey-power-reset-and-multi-psu-2026-04-22.md: April 22 workstation power/reset findings and multi-PSU research memo for honey.
• docs/research/honey-reset-matrix-2026-04-22.md: reset-focused matrix for the failed and recovered honey display/GPU states.
• docs/tracking/linear-git-workflow.md: active Linear issue map and branch policy for the hardware lane.
• docs/tracking/hygiene-mini-sprint-2026-04-25.md: current cleanup sprint for tracker truth, GloriousFlywheel runner/cache parity, and evidence sequencing.
• docs/tracking/rt-smi-numa-chapel-focus-2026-04-25.md: focused cross-repo map for the RT, SMI, NUMA, Chapel, linux-xr, XoxdWM, and GloriousFlywheel lane.
• docs/tracking/pr14-split-plan-2026-04-25.md: concrete branch/merge split plan for the broad draft PR stack.
• docs/tracking/measured-evidence-map.md: current split between real measured evidence, historical imported measurements, and still-unmeasured scaffolding.
• docs/tracking/public-readiness-audit-2026-04-26.md: current private-to-public readiness audit, cleanup actions, and remaining publication blockers.
• docs/tracking/public-artifact-policy-2026-04-26.md: raw capture versus sanitized summary policy for public branch preparation.
• docs/tracking/public-candidate-branch-plan-2026-04-28.md: candidate branch, raw artifact, CI/status, and publication-claim gate for public visibility.
• docs/tracking/linear-dell-sla-todo-2026-04-28.md: dated Dell Linear SLA todo snapshot and tracker-truth triage.
• docs/tracking/repo-health-reality-check-2026-04-23.md: dated git, issue, evidence, and cross-repo health check.
• docs/tracking/workstream-status-2026-04-22.md: dated status snapshot of the active workstreams and recommended next scopes.
• data/captures/: private durable live host capture artifacts. Public branches publish sanitized summaries and derived tables instead.
• data/measurements/feature-register.csv: feature-by-feature measurement register.
• data/measurements/honey-fan-support-matrix.csv: working support matrix for stock and candidate fan rows.
• data/measurements/honey-fan-noise-runs.csv: optional lightweight acoustic run log.
• data/measurements/session-01-print-manifest.csv: print manifest for the current Session 01 coupon family.
• data/measurements/session-01-priority-log.csv: pre-seeded first session capture sheet.
• analysis/: Chapel workspace for NUMA probes, timing invariants, and property-based testing.
• cad/openscad/: parametric OpenSCAD source and shared configuration.
• cad/freecad/: FreeCAD-side notes and import/export helpers.
• scripts/platform/: Dell 7810 BIOS and SMI validation helpers.
• scripts/platform/runner-enrollment-status: read-only GitHub/ARC diagnosis for the shared tinyland-nix runner enrollment blocker.
• packaging/kernel/: generic T7810 host-kernel config fragments and boot posture.
• packaging/tuned/: low-latency host tuning profiles and helper scripts.
• nix/packages/: repo-local package definitions such as Chapel for NUMA experiments.
• BOM.md: provisional COTS shortlist and fabrication consumables.
• output/: generated fabrication assets such as DXF, STL, STEP, and PDF. Public candidate branches avoid newly generated placeholder mesh churn unless a measured or built revision is intentionally promoted.
• prototypes/fit-checks/: notes and artifacts for 3D-printed coupons and slivers.
• fixtures/: measurement jigs, templates, or sacrificial helpers.

1. Capture the chassis interface and interference envelope.
2. Print fit-check coupons for the latch, lower rail, and rear edge geometry.
3. Lock the enclosure architecture and cable/PSU strategy.
4. Generate flat patterns and bend-ready parts.
5. Build and test a metal alpha, then iterate toward a production package.

The repo includes a minimal flake.nix and justfile to standardize tools around OpenSCAD-first work:

direnv allow
nix develop path:.
just --list
nix develop path:.#chapel

openscad is confirmed available locally. FreeCAD is not currently on PATH, so the shell treats it as optional until that is resolved.

For Chapel-specific sourcing and the current external-vs-local split, see docs/platform/chapel-sourcing.md.

For the current paper-safe Chapel and PBT claim boundary, also use analysis/README.md and docs/publication/claim-traceability.md.

For paper and presentation framing, use docs/publication/README.md together with docs/platform/xoxdwm-boundary-audit.md before treating this repo and XoxdWM as one blended source.

The current case-work bench loop is:

just fit-coupons-session-01
just measurements-session-01-status
just measurements-session-01-evidence-status
just measurements-session-01-scad-preview
just measurements-session-01-apply-scad

Use just measurements-session-01-apply-scad-write only after the dry-run diff looks correct. It only stamps confirmed assignments into cad/openscad/lib/measured-params.scad, and it refuses to write if the bench evidence is incomplete.

For case work, start with docs/measurements/measurement-plan.md and docs/measurements/case-work-todo.md before making any serious interface geometry claims. For host-platform work, use docs/research/honey-reset-matrix-2026-04-22.md and docs/platform/README.md to keep workstation-specific validation in this repo rather than in XoxdWM.

Original material authored for this repository is licensed under Zlib. Third-party dependencies and upstream projects retain their own licenses. See LICENSE.md for scope and docs/tracking/dependency-license-notes-2026-04-26.md for the direct dependency-license boundary.