0.5.0 — the rename: DriftPin becomes AnkusDrive

The project was renamed from DriftPin to AnkusDrive, and published to PyPI.
Under that headline sits the largest release so far: the simulation surface grew
past structural FEM into molding, full-wave EM, granular mechanics, exterior
acoustics and coupled FSI; a design-control layer arrived so an agent can manage
designs rather than files; Windows and Apple Silicon became first-class rather
than aspirational; and the CFD work grew a trust layer, so a number now arrives
with the evidence that it converged.

Upgrading from 0.4.x is a rename, and every surface keeps accepting the old
spelling for exactly this one release. Read
MIGRATION.md first — especially the part about DP_* document
properties, whose failure mode if the shims are ignored is silent.

Added

Simulation — new physics.

• Nonlinear structural analysis via CalculiX: plasticity, large deflection, contact
  (#94).
• Full-wave FDTD electromagnetics via openEMS — waveguide cutoff, dipole resonance
  (#95).
• Granular and powder mechanics via YADE (DEM): random close packing, Beverloo
  discharge, angle of repose (#96).
• Exterior acoustics via Bempp (BEM): monopole radiation, Mie scattering
  (#97).
• Partitioned fluid–structure interaction via preCICE, coupling OpenFOAM to
  CalculiX (#98).
• Injection molding end to end: analytic moldability screen, an interFoam fill
  solve, the openInjMoldSim OF7 fill case, the packing/cooling stage, and warpage
  as a CalculiX thermo-elastic post-step
  (#109,
  #112,
  #114,
  #115,
  #133).
• Optics: lens design and optimization via optiland, non-sequential STL tracing via
  KrakenOS (#89).
• Laminates: classical lamination theory effective properties, bimetal warp,
  first-ply failure (#129).

Simulation — trust and search.

• The virtual wind tunnel: arbitrary solids in external flow, not just the library
  of canonical shapes (#253).
• A CFD trust layer — convergence history, checkMesh, measured y+, Richardson
  extrapolation and GCI — so a drag number arrives with its own evidence
  (#255).
• A verified oracle for turbulent external flow: "gated" became per (model, case
  family) rather than a single blanket claim
  (#266).
• Performance contracts: declare_performance / verify_performance, which then
  became gates consulted by merge, substitutability and the builder brief
  (#256,
  #267).
• study_submit (DOE / parameter sweeps) and optimize_submit (vary parameters
  until the spec is met, then prove it), the latter running over a recipe on a
  main-thread work queue (#258,
  #259,
  #273).
• fem_result_probe — stress and displacement at a point or a face
  (#126).

Designs, not just parts — the design-control layer.

• Item model and part numbering (#150),
  part recipes (#151), a
  driving/driven parameter DAG (#153),
  revision and lifecycle state (#154),
  a Liskov substitutability gate (#155),
  variant families from a design table (#156),
  declared-input feature recipes (#157),
  a project container with a master skeleton and reference-integrity guard
  (#158), versioned interface types
  with a conformance gate (#159), and
  ECO records with where-used impact and baselines
  (#160).

Manufacturing and release.

• Sheet metal: bends and flanges, K-factor unfold, flat pattern, layered DXF
  (#243).
• An honest CNC machining time, and a reason to loosen a tolerance rather than a
  bare cost number (#242).
• Inspection: ballooned drawings, an inspection plan, an AS9102-shaped FAI report
  (#240).
• release_package — a one-call vendor/RFQ bundle, gated by lifecycle state, ECO
  and the title block (#241).
• Orderable standard parts: canonical designations and an off-the-shelf catalog
  (#244).
• Headless 2D drawings: multi-view PDF/SVG/DXF with dimensions, a manufacturability
  and legibility gate, lane packing, a title block, an iso pictorial and an
  automatic cross-section (#80,
  #86,
  #87).

Reference corpora.

• Mechanical properties with FreeCAD's own material cards first-class, plus
  provenance and basis (#119).
• ISO threads and fasteners, bearing C/C0 ratings, ISO 286 fits, stock tables
  (#118).
• Thermophysical fluid properties via CoolProp
  (#117).
• A typed units and quantity layer at the tool boundary
  (#128).

Platforms.

• Windows is a first-class target: FreeCAD and ccx discovery, doctor, native
  solvers, a CI lane, a native bash-free SU2 runner, verified Elmer thermal
  families, and the OpenFOAM-backed families routed through WSL
  (#206,
  #207,
  #209,
  #214).
• Apple Silicon: a Darwin solver path and discovery glob, a per-OS substrate
  launcher with Multipass discovery, the coupled FSI solve routed through the VM,
  the molding and CFD families reaching the same in-VM trust, and openInjMoldSim
  arm64-enabled and live-verified
  (#213,
  #217,
  #218,
  #221,
  #275,
  #286).
• A persistent config file as a resolution layer — env → config.toml → auto —
  because MCP hosts launch with a minimal environment and a shell export never
  reaches them (#210).
• Agent-guided setup: a setup_status tool, a diagnose_setup prompt, an
  ankusdrive://setup resource, and an interactive provisioner with
  --print-mcp-config (#211,
  #212).

Multi-agent design.

• A motion oracle — does the assembly actually move? (RFC §11.9,
  #76) — and
  geometry-realizes-declaration, which asks whether the metal backs the claim
  (RFC §11.10, #78).
• Agents built an oracle-certified functional gearbox, with a train-ratio gate
  (#77).

Changed

• The project is named AnkusDrive. Package, console script, environment
  variables, config directory, MCP tool prefix, document properties and repository
  all changed, with a CI guard that keeps it renamed
  (#295,
  #297).
• The MCP server is safe for a team of agents: the shared Worker is serialized and
  each agent gets an isolated workspace
  (#184).
• Solver discovery distinguishes "unwired" from "absent", so a solver you have
  installed stops being reported as missing
  (#181).
• All text file I/O opens with an explicit UTF-8 encoding, guarded by a contract
  test (#215).
• Errors that told you what to do now tell you something you can actually run —
  cost_estimate, slice_estimate, and press_fit_stress, which additionally
  refuses an assumed modulus rather than passing an unrun check
  (#263,
  #268,
  #270).

Deprecated

Everything below still works in 0.5.x and is removed in 0.6.0. See
MIGRATION.md.

• The driftpin console script. Installed, prints a rename notice, delegates.
• DRIFTPIN_* environment variables, promoted to their ANKUSDRIVE_* names at
  startup unless the new name is already set.
• ~/.config/driftpin/config.toml and %APPDATA%\driftpin\config.toml, still read
  when no ankusdrive config exists. Writes always go to the new path.
• Solvers provisioned under a DriftPin/solvers directory, still discovered on
  Windows and macOS.
• DP_* document properties. Reads accept either spelling and a write updates the
  old property in place. This is the shim worth understanding: had the old names
  simply been dropped, an annotated part would open fine and read back as though it
  had never been annotated — no interfaces, no intent, no verdict, and no error.
  Removing the fallback in 0.6 will come with an explicit document migration.

Fixed

• mcp is pinned below 2.0, which installs cleanly and then breaks ankusdrive mcp
  by dropping mcp.server.fastmcp
  (#285).
• add_primitive honours name= by setting the object's Label
  (#250).
• A modal solve that never finished is reported as its own outcome rather than as a
  floppy part (#252).
• The built wheel and sdist are tested for the runtime corpora they must carry, so a
  package-data omission fails in CI instead of at a pip-installed user's first
  thread() (#251).