rajamesandClaude Opus 5.5
a2d21d5cda
D-12 (ruled 2026-10-02): Q.SQRT of a negative value and Q.LOG of zero or a negative value return 0 and set NODE-ERROR, as Q./ does on division by zero. Q.SQRT is v3's q48_sqrt_approx: Newton from x0 = q/2 + 0.25, up to 8 rounds of x' = (x + q/x) / 2, returning x once |x' - x| < 10 ulp; sqrt(0) = 0 and sqrt(1.0) = 1.0. q, x and the rounds left live in a 5-cell variable (QR). Checked bit for bit against v3's q48_sqrt_approx (ported into the test) on 19 edge values and 3000 pseudo-random q below 2^48, at both cell widths, optimised and ASan+UBSan. Above 2^48 v3's q48_div saturates and v4 divides correctly, so there is no parity there. Bug found and fixed on the way: the "< 10 ulp" test subtracted 10 from the step's low cell as a signed number, so at 32-bit cells a step of 2^31 or more read as small and the iteration stopped early. It now tests the low cell's top bit first, as Q.EXP does. The first test run missed it because `make build/32-test_foundation.c` rebuilds nothing (the Makefile's rules use absolute paths); the mutation runs, compiled from source, exposed it. Only `make test` is used from here. Headroom (data under arg / return): Q.SQRT 3/2. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
StarForth / LithosAnanke Documentation
This is the lithosananke branch: the bare-metal StarKernel side of the project
(contrast master, which is the hosted-VM-only side). Documentation follows the
two-tier model described in docs/CLAUDE.md: formal/ is the polished,
citable LaTeX tier; working/ is living design notes and drafts that feed it.
Everything else in this directory is branch- or subsystem-specific material that
doesn't fit either tier.
Layout
- formal/ — Three-volume LaTeX documentation set (research volumes,
practitioner books, standalone reports) plus the
scraps/fragment library it's assembled from. Audience: patent counsel, SSRN reviewers, licensees, hobbyists with hardware in hand. Seeformal/CLAUDE.mdfor authoring conventions. - working/ — Living documents: architecture design notes, DoE
experiment logs, hardware/platform notes, draft specs, academic-paper source
material, and an archive of superseded docs. Source material for
formal/. - 03-architecture/ — Tripod VM architecture constraints (Hera/Hermes/Artemis) and the word-level ACL system design.
- lithosananke/ — LithosAnanke kernel branch documentation: milestone roadmap, system architecture, HAL reference, kernel command-line argument design, and the amd64 APIC-timer ISR postmortem.
- birthing/ — VM birthing plan and status for the Hera-spawns- Hermes/Artemis constellation, plus three-architecture QEMU acceptance logs.
- patent/ — Provisional patent application source. Legal hold — ask Bob before touching anything in this directory.
- api/ — Generated Doxygen tag file and warnings log (gitignored; not part of the tracked doc tree).
- pptx/ — Elevator-pitch and deep-dive slide decks for different audiences (technical, non-technical, academic, PhD-level).
Current Active Work
- LithosAnanke M7/M7.1 — VM parity validation and init capsule architecture.
See
lithosananke/README.mdandlithosananke/M7.1.md. - Word-level ACL system — Phase 6 complete on
master; Phase 7 (LithosAnanke parity) is the next step. See03-architecture/word-acl/README.md. - Tripod VMs — Hera (governor), Hermes (messenger), Artemis (memory/block
storage). See
03-architecture/tripod/README.mdandbirthing/.
Contributing
- Place new material in
working/first; promote toformal/only when it's ready to be cited (seeformal/CLAUDE.mdfor promotion criteria). - Never touch
patent/,formal/patent/,formal/scraps/legal/, orworking/legal/without Bob's explicit instruction. - Add a
README.mdto any new category-level subdirectory, following the format used throughout this tree: orientation paragraph + bullet list of real files with one-line descriptions.