Adds Module 28 (framebuffer_words.c/.h): PLOT ( x y color -- ), FB-WIDTH, FB-HEIGHT -- raw hardware-boundary C primitives, kernel-only, no-op on hosted builds, same pattern as every other module. Adds capsules/fabric.4th (blocks 4900-4902, mkcapsule --lint clean): COS45/Z->DELTA/PROJECT/CART-Y/CART-PLOT -- the 45-degree cavalier orthographic projection and Y-flip, in FORTH per the compose-in-FORTH-first rule (this is policy, not hardware access). Found and fixed a second real bug while live-testing CART-PLOT over the serial socket: defining_word_variable() (defining_words.c) captured vm->here as a VARIABLE's address with no alignment call first, while vm_load_cell/vm_store_cell require 8-byte-aligned addresses. This capsule's VARIABLE ZD landed misaligned (945) purely by chance of what preceded it; other capsules' variables happened to land aligned by luck, not guarantee. Real deviation from FORTH-83/ANS, which specifies VARIABLE reserves an aligned cell. Fixed with vm_align(vm) before capturing addr -- ALIGN already existed as a word but VARIABLE wasn't calling it. Verified end-to-end on amd64 via manual serial injection + QEMU screendump: plotted 4 marker points (origin, +100 X, +100 Y, +50 Z) and confirmed all landed at hand-calculated raster coordinates, including the diagonal up-right shift for the Z-axis point -- the projection math is correct, not just non-crashing. fb/fabric-test-cart-plot.png. 4.3.1's corner diagnostic still renders correctly in the same shot, confirming no regression. All three architectures (amd64/aarch64/riscv64) boot clean to ok> with the DoE completing; dict_hash identical across all three (0xc7f9adf885e306d2), confirming parity is unaffected. FABRIC.md item 4.3.3 marked done with full acceptance evidence.
src/
Hosted StarForth VM implementation (compiled by the root Makefile).
Bare-metal kernel sources live in src/starkernel/; FORTH word
implementations in src/word_source/; the test harness in
src/test_runner/; platform shims in src/platform/.
Entry point / interpreter core
main.c— CLI entry point, VM init, DoE mode dispatch.vm.c— interpreter loop, stacks, dictionary state (the central runtime file).vm_api.c— external VM API implementation.vm_bootstrap.c— VM bootstrap initialization.vm_debug.c— debugging utilities.vm_time.c— time-related VM operations.vm_internal.h— internal-only declarations shared across thevm_*.cfiles, not part of the publicinclude/vm_api.hsurface.repl.c— REPL read-eval-print loop.cli.c— CLI argument parsing.io.c— I/O operations.log.c— logging infrastructure.
Memory / dictionary / blocks
memory_management.c— dictionary allocator.dictionary_management.c— dictionary allocation and search.dictionary_heat_optimization.c— Loop #1 execution-heat tracking.word_registry.c— word registration system.block_subsystem.c— logical→physical block mapper.blkio_file.c,blkio_ram.c,blkio_factory.c— block I/O backends (file-backed, RAM-backed) and the factory that selects between them.stack_management.c— stack operations.
Physics-driven adaptive runtime (7 feedback loops)
physics_runtime.c— main physics coordinator.physics_hotwords_cache.c— Loop #1 hot-words caching.physics_metadata.c— per-word metadata tracking.physics_pipelining_metrics.c— Loop #4 word-transition prediction.physics_execution_hooks.c— execution instrumentation.rolling_window_of_truth.c— Loop #2 circular execution-history buffer.inference_engine.c— Loops #5/#6, statistical inference (window-width, decay-slope).ssm_jacquard.c— L8 Jacquard steady-state mode selector; consumescompudynamics.cfor tuning-word/config lookups.compudynamics.c— generic compudynamics module (cd_tuning_word(),cd_tuning_vm()); the score/UCB/reward/weight constants for the L8 adaptive table live here, not inssm_jacquard.c.heartbeat_export.c— heartbeat metrics export (CSV export function itself not yet implemented — seedocs/working/architecture/heartbeat_csv_export.md).
Math / measurement
math_portable.c— portable math functions.profiler.c— performance profiling.doe_metrics.c— Design of Experiments metrics (2^7 factorial).
Any .bak file alongside a .c file here (doe_metrics.c.bak,
inference_engine.c.bak, vm.c.bak) is a pre-edit backup left by a past
maintenance script (see scripts/remove_loop_conditionals.sh), not a
build input.