docs(analog): competitors, prior art and ten weaknesses of the analog-emulation approach (Closes #10502) by gHashTag · Pull Request #10506 · gHashTag/t27

gHashTag · 2026-10-18T15:35:27Z

docs/analog/competitors.md (420 lines, ASCII, 83 lines with source URLs): commercial FPGA circuit solvers (Typhoon HIL, OPAL-RT eHS, Plexim RT Box, dSPACE, RTDS, NI), Simscape HDL, real-number modeling, Stanford msdsl/svreal/anasymod, academic SPICE-on-FPGA work, ngspice/XSPICE, Xyce, OpenVAF, cpphdl analog, AI-native analog tools.

Findings that change the plan of #10486:

The core method (nodal analysis, fixed step, backward Euler, constant matrices) is not novel; claiming novelty over msdsl or cpphdl is unsafe.
What may differ: foundry-PDK transistor tables (IHP PSP103) on an FPGA solver, a bit-exact fixed-point reference, and one .t27 spec as the single source. Bounded search, not a proof.
W1 backward Euler damping -> analog M1c: exact zero-order-hold discretization for the linear cell, and the h / h/2 convergence check #10503 (exact zero-order-hold option, h / h/2 check). W7 no wall-time comparison, M0 is 1.2x slower than real time -> analog bench: wall time of ngspice against the board for the same circuits -- no speed claim without it #10505. W3/W4 tables: charge as well as current, loaded into BRAM at run time instead of one bitstream per corner -> M3 design in the epic.

Every claim is tagged [V] read, [S] snippet, [U] unknown, [I] inference; proposed thresholds need the owner's sign-off before they become gates.

🤖 Generated with Claude Code

…-emulation approach (Closes #10502) Typhoon HIL, OPAL-RT eHS, Plexim, dSPACE, RTDS, NI, Simscape HDL, RNM, Stanford msdsl/svreal/anasymod, SPICE-on-FPGA papers, ngspice, Xyce, OpenVAF, cpphdl; where #10486 is not novel and where it may differ; weaknesses W1-W10, each with a mitigation and a measurable check. Every claim is tagged [V]/[S]/[U]/[I] with its URL. Thresholds are proposals. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com> Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

github-actions · 2026-10-18T15:35:49Z

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Generated at: 2026-10-18 15:35:40 UTC

docs(analog): competitors, prior art and ten weaknesses of the analog-emulation approach (Closes #10502) #10506 docs(analog): competitors, prior art and ten weaknesses of the analog-emulation approach (Closes #10502) | Created: 2026-10-18 | Updated: 2026-10-18 | 24 failing / 29 total
spec(t27mcp): visual_output.t27 -- every answer carries a T27F visual, by host (Closes #10531) #10504 spec(t27mcp): visual_output.t27 -- every answer carries a T27F visual, by host | Created: 2026-10-18 | Updated: 2026-10-18 | 7 failing / 35 total
spec(automation): app-tabs.t27 -- every app tab and the tools that serve it at TRI CLAW's one /mcp (Closes #10532) #10491 spec(automation): app-tabs.t27 -- every app tab and the tools that serve it at TRI CLAW's one /mcp | Created: 2026-10-18 | Updated: 2026-10-18 | 4 failing / 35 total
fix(t27c): seal --verify reads the committed gen file; compile refuses a hand-written output (draft, needs owner-approved-foreign) #10481 fix(t27c): seal --verify reads the committed gen file; compile refuses a hand-written output (draft, needs owner-approved-foreign) | Created: 2026-10-18 | Updated: 2026-10-18 | 2 failing / 46 total
fpga(ax7203): ternary mat-vec over real tern-tc-9m weights in DDR3, UART receipt (Closes #10461) #10475 fpga(ax7203): ternary mat-vec over real tern-tc-9m weights in DDR3, UART receipt (Closes #10461) | Created: 2026-10-18 | Updated: 2026-10-18 | 2 failing / 46 total
spec(ml): eval_hslm and ngram_hslm -- HSLM held-out loss at step 8000 against unigram, bigram and trigram baselines (Refs #10372) #10467 spec(ml): eval_hslm -- held-out loss of an HSLM checkpoint, last position and full sequence (Refs #10372) | Created: 2026-10-18 | Updated: 2026-10-18 | 5 failing / 36 total
t27c seal: wire seal_write.t27 into the seal writers -- refuse collisions, recheck, stage then rename (Closes #10454) #10466 t27c seal: wire seal_write.t27 into the seal writers -- refuse collisions, recheck, stage then rename (Closes #10454) | Created: 2026-10-18 | Updated: 2026-10-18 | 4 failing / 47 total
fix(seal): refuse a seal file another spec owns, re-check the hash after the write, land it by rename #10464 fix(seal): refuse a seal file another spec owns, re-check the hash after the write, land it by rename | Created: 2026-10-18 | Updated: 2026-10-18 | 7 failing / 48 total
igla ptx v2: cp.async ring, 128x128xBK64 tile, prmt-decoded W; within 1.33x of CUTLASS s8 (Refs #10404) #10456 igla ptx v2: cp.async ring, 128x128xBK64 tile, prmt-decoded W; within 1.33x of CUTLASS s8 (Refs #10404) | Created: 2026-10-18 | Updated: 2026-10-18 | 6 failing / 46 total
ledger: re-derive from master 380a81f24923, as its lab verdict APPLY says (Closes #10447) #10448 ledger: re-derive from master 380a81f24923, as its lab verdict APPLY says (Closes #10447) | Created: 2026-10-18 | Updated: 2026-10-18 | 3 failing / 33 total
check: refuse a module that declares a top-level name twice (Closes #10421) #10442 check: refuse a module that declares a top-level name twice (Closes #10421) | Created: 2026-10-18 | Updated: 2026-10-18 | 5 failing / 44 total
t27c PTX backend: ternary x int8 GEMM kernel emitted by a .t27 spec (int8 mma.sync), ptx-run glue #10425 t27c PTX backend: ternary x int8 GEMM kernel emitted by a .t27 spec (int8 mma.sync), ptx-run glue | Created: 2026-10-18 | Updated: 2026-10-18 | 2 failing / 48 total
t27f: frame_shard.t27 -- a generic frame partition for reel renders; token_floor uses it (Closes #10385) #10388 t27f: frame_shard.t27 -- a generic frame partition for reel renders; token_floor uses it (Closes #10385) | Created: 2026-10-18 | Updated: 2026-10-18 | 31 failing / 34 total
spec(ml): train_hslm -- main() trains the whole 3-block HSLM with STE and LAMB, writes MSLH checkpoints (Refs #10372) #10387 spec(ml): train_hslm -- main() trains the whole 3-block HSLM with STE and LAMB, writes MSLH checkpoints (Refs #10372) | Created: 2026-10-18 | Updated: 2026-10-18 | 1 failing / 35 total
demo: claw/sarif alert on a spec that does not parse (DO NOT MERGE, Refs #10356) #10381 demo: claw/sarif alert on a spec that does not parse (DO NOT MERGE, Refs #10356) | Created: 2026-10-18 | Updated: 2026-10-18 | 6 failing / 33 total
spec(hslm): nn/hslm_tokenizer and ml/hslm_corpus -- the 729-token BPE and a pinned TinyStories token file (Refs #10372) #10380 spec(hslm): nn/hslm_tokenizer and ml/hslm_corpus -- the 729-token BPE and a pinned TinyStories token file (Refs #10372) | Created: 2026-10-18 | Updated: 2026-10-18 | 4 failing / 32 total
igla coder: pre-flight and kill rule as .t27 specs (Closes #10363) #10364 igla coder: pre-flight and kill rule as .t27 specs (Closes #10363) | Created: 2026-10-18 | Updated: 2026-10-18 | 5 failing / 37 total
spec(seal_identity): frontier --reseal reseals a MISSING spec that already has a legacy seal (Closes #10533) #10267 spec(seal_identity): frontier --reseal reseals a MISSING spec that already has a legacy seal | Created: 2026-10-18 | Updated: 2026-10-18 | 8 failing / 41 total
spec(port): land the remaining CR-CHAT ring batch -- 18 targets (Closes #10579; Refs #8883, #8884) #10175 spec(port): land the remaining CR-CHAT ring batch -- 18 targets (Refs #8883, #8884) | Created: 2026-10-18 | Updated: 2026-10-18 | 4 failing / 34 total
spec(port): port specs/port/trios-railway/crates/trios-igla-race/src/bin/reset_queue.t27 (Closes #9743) #10056 spec(port): port specs/port/trios-railway/crates/trios-igla-race/src/bin/reset_queue.t27 (Closes #9743) | Created: 2026-10-17 | Updated: 2026-10-18 | 3 failing / 32 total
spec(port): port specs/port/trios-railway/crates/trios-igla-race/src/bin/smoke_agent.t27 (Closes #9714) #10022 spec(port): port specs/port/trios-railway/crates/trios-igla-race/src/bin/smoke_agent.t27 (Closes #9714) | Created: 2026-10-17 | Updated: 2026-10-18 | 3 failing / 32 total
spec(port): port specs/port/trios-railway/crates/trios-igla-race/src/bin/debug_queue.t27 (Closes #9704) #10015 spec(port): port specs/port/trios-railway/crates/trios-igla-race/src/bin/debug_queue.t27 (Closes #9704) | Created: 2026-10-17 | Updated: 2026-10-18 | 3 failing / 32 total
t27b: repair crypto and rust_convert; distinguish PR ledger lag #9637 t27b: repair crypto and rust_convert; distinguish PR ledger lag | Created: 2026-10-15 | Updated: 2026-10-15 | 3 failing / 33 total
spec(port): share tree helpers across eight gen_w ports (Closes #9633) #9636 spec(port): share tree helpers across eight gen_w ports (Closes #9633) | Created: 2026-10-15 | Updated: 2026-10-17 | 3 failing / 33 total
Port fpga/verilog/gft_xorpercep_jtag.v (Verilog, 1 module) to specs/port/fpga/verilog/gft_xorpercep_jtag.t27 #9549 Port fpga/verilog/gft_xorpercep_jtag.v (Verilog, 1 module) to specs/port/fpga/verilog/gft_xorpercep_jtag.t27 | Created: 2026-10-14 | Updated: 2026-10-14 | 4 failing / 29 total
Port gHashTag/trios:crates/trios-git/src/stage.rs (Rust, 2 functions) to specs/port/trios/crates/trios-git/src/stage.t27 #9548 Port gHashTag/trios:crates/trios-git/src/stage.rs (Rust, 2 functions) to specs/port/trios/crates/trios-git/src/stage.t27 | Created: 2026-10-14 | Updated: 2026-10-14 | 4 failing / 29 total
Port gHashTag/trios:crates/trios-rainbow-bridge/src/bridge.rs (Rust, 5 functions) to specs/port/trios/crates/trios-rainb #9485 Port gHashTag/trios:crates/trios-rainbow-bridge/src/bridge.rs (Rust, 5 functions) to specs/port/trios/crates/trios-rainb | Created: 2026-10-14 | Updated: 2026-10-14 | 4 failing / 29 total
Port scripts/gen_w734.py (Python, 3 functions) to specs/port/scripts/gen_w734.t27 #9484 Port scripts/gen_w734.py (Python, 3 functions) to specs/port/scripts/gen_w734.t27 | Created: 2026-10-14 | Updated: 2026-10-14 | 4 failing / 29 total
Port scripts/gen_w726.py (Python, 3 functions) to specs/port/scripts/gen_w726.t27 #9463 Port scripts/gen_w726.py (Python, 3 functions) to specs/port/scripts/gen_w726.t27 | Created: 2026-10-14 | Updated: 2026-10-14 | 3 failing / 29 total
Port gHashTag/trinity:src/tri/sacred_alu.zig (Zig, 4 functions) to specs/port/trinity/src/tri/sacred_alu.t27 #9427 Port gHashTag/trinity:src/tri/sacred_alu.zig (Zig, 4 functions) to specs/port/trinity/src/tri/sacred_alu.t27 | Created: 2026-10-13 | Updated: 2026-10-13 | 5 failing / 29 total
Port gHashTag/trios:crates/trios-phd/src/bin/rag_search.rs (Rust, 3 functions) to specs/port/trios/crates/trios-phd/src/ #9426 Port gHashTag/trios:crates/trios-phd/src/bin/rag_search.rs (Rust, 3 functions) to specs/port/trios/crates/trios-phd/src/ | Created: 2026-10-13 | Updated: 2026-10-13 | 4 failing / 29 total
Port gHashTag/trinity:src/vibeec/spec_loader.zig (Zig, 2 functions) to specs/port/trinity/src/vibeec/spec_loader.t27 #9407 Port gHashTag/trinity:src/vibeec/spec_loader.zig (Zig, 2 functions) to specs/port/trinity/src/vibeec/spec_loader.t27 | Created: 2026-10-13 | Updated: 2026-10-13 | 4 failing / 29 total
Port gHashTag/trinity:src/background_agent/config.zig (Zig, 5 functions) to specs/port/trinity/src/background_agent/conf #9345 Port gHashTag/trinity:src/background_agent/config.zig (Zig, 5 functions) to specs/port/trinity/src/background_agent/conf | Created: 2026-10-13 | Updated: 2026-10-13 | 5 failing / 29 total
chore(deps)(deps): Bump tower-http from 0.6.8 to 0.7.1 #9340 chore(deps)(deps): Bump tower-http from 0.6.8 to 0.7.1 | Created: 2026-10-13 | Updated: 2026-10-13 | 4 failing / 39 total
chore(deps)(deps): Bump futures-util from 0.3.32 to 0.3.34 #9339 chore(deps)(deps): Bump futures-util from 0.3.32 to 0.3.34 | Created: 2026-10-13 | Updated: 2026-10-13 | 4 failing / 36 total
chore(deps)(deps): Bump hyper from 1.11.1 to 1.12.0 #9338 chore(deps)(deps): Bump hyper from 1.11.1 to 1.12.0 | Created: 2026-10-13 | Updated: 2026-10-13 | 4 failing / 36 total
chore(deps)(deps): Bump uuid from 1.26.1 to 1.28.0 #9337 chore(deps)(deps): Bump uuid from 1.26.1 to 1.28.0 | Created: 2026-10-13 | Updated: 2026-10-13 | 4 failing / 36 total
chore(deps)(deps): Bump tokio from 1.53.1 to 1.53.2 #9336 chore(deps)(deps): Bump tokio from 1.53.1 to 1.53.2 | Created: 2026-10-13 | Updated: 2026-10-13 | 4 failing / 36 total
Port gHashTag/trios:crates/trios-cli/src/cmd/train.rs (Rust, 6 functions) to specs/port/trios/crates/trios-cli/src/cmd/t #9321 Port gHashTag/trios:crates/trios-cli/src/cmd/train.rs (Rust, 6 functions) to specs/port/trios/crates/trios-cli/src/cmd/t | Created: 2026-10-13 | Updated: 2026-10-13 | 4 failing / 29 total
Port gHashTag/trinity:fpga/openxc7-synth/spi_flash_master.v (Verilog, 1 module) to specs/port/trinity/fpga/openxc7-synth #9263 Port gHashTag/trinity:fpga/openxc7-synth/spi_flash_master.v (Verilog, 1 module) to specs/port/trinity/fpga/openxc7-synth | Created: 2026-10-12 | Updated: 2026-10-12 | 7 failing / 29 total
policy: list check_documented_commands_exist.py for the MAX_DEAD_TRI 141->140 follow-up #9231 policy: list check_documented_commands_exist.py for the MAX_DEAD_TRI 141->140 follow-up | Created: 2026-10-12 | Updated: 2026-10-12 | 3 failing / 26 total
spec fix: 4 specs in specs/tri/net the reference blocks -- rewrite them in t27 (1 of 1) #9214 spec fix: 4 specs in specs/tri/net the reference blocks -- rewrite them in t27 (1 of 1) | Created: 2026-10-12 | Updated: 2026-10-12 | 5 failing / 29 total
Port gHashTag/trios:crates/trios-agent-harness/rings/AH-00/src/lib.rs (Rust, 3 functions) to specs/port/trios/crates/tri #9200 Port gHashTag/trios:crates/trios-agent-harness/rings/AH-00/src/lib.rs (Rust, 3 functions) to specs/port/trios/crates/tri | Created: 2026-10-12 | Updated: 2026-10-12 | 6 failing / 29 total
Port bootstrap/src/compiler.rs lines 30977-31050 (Rust, 6 functions) to specs/port/bootstrap/src/compiler/LinkSegment_te #9178 Port bootstrap/src/compiler.rs lines 30977-31050 (Rust, 6 functions) to specs/port/bootstrap/src/compiler/LinkSegment_te | Created: 2026-10-11 | Updated: 2026-10-12 | 6 failing / 29 total
Port gHashTag/trinity:src/storm/links/vibee.zig (Zig, 1 function) to specs/port/trinity/src/storm/links/vibee.t27 #9177 Port gHashTag/trinity:src/storm/links/vibee.zig (Zig, 1 function) to specs/port/trinity/src/storm/links/vibee.t27 | Created: 2026-10-11 | Updated: 2026-10-12 | 5 failing / 32 total
Port scripts/gen_w706.py (Python, 3 functions) to specs/port/scripts/gen_w706.t27 #9150 Port scripts/gen_w706.py (Python, 3 functions) to specs/port/scripts/gen_w706.t27 | Created: 2026-10-11 | Updated: 2026-10-12 | 7 failing / 30 total
feat(wasm): MVP - AI-generated FPGA interpreter executing WASM #9148 feat(wasm): MVP - AI-generated FPGA interpreter executing WASM | Created: 2026-10-11 | Updated: 2026-10-11 | 9 failing / 37 total
gen-rust: eight constructs that passed test-report now compile under rustc (Closes #8891) #9135 gen-rust: eight constructs that passed test-report now compile under rustc (Closes #8891) | Created: 2026-10-11 | Updated: 2026-10-12 | 3 failing / 40 total
docs(agents): new functionality is written in .t27 only (Closes #10535) #8936 docs(agents): new functionality is written in .t27 only | Created: 2026-10-11 | Updated: 2026-10-11 | 4 failing / 24 total
t27b verilog: pin declarations, and the TRI-NET board top in .t27 with no hand Verilog or XDC (Closes #8889) #8890 t27b verilog: pin declarations, and the TRI-NET board top in .t27 with no hand Verilog or XDC (Closes #8889) | Created: 2026-10-11 | Updated: 2026-10-18 | 3 failing / 31 total

Summary

Status	Count
Total Open PRs	50
PRs with Failing Checks	48
PRs with All Checks Green	2
READY	0
FAILING	48
PENDING	0
NO CHECKS YET	0

These columns do not partition: 0 + 48 + 0 + 0 = 48, and there are 50 open PRs. A PR is being counted twice or not at all.

Seal Status

⚠️ STALE -- sha256(compiler.rs)=fad12492937a != manifest seal=87e5cbd3ad94.
The committed NMSE numbers were certified against an older compiler.rs.
Run scripts/reseal-check.sh locally for the two-step reseal command (advisory; not a merge gate).

gHashTag enabled auto-merge (squash) October 18, 2026 15:35

github-actions Bot mentioned this pull request Oct 18, 2026

t27f: frame_shard.t27 -- a generic frame partition for reel renders; token_floor uses it (Closes #10385) #10388

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gHashTag merged commit e25345f into master Oct 18, 2026
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gHashTag mentioned this pull request Oct 18, 2026

epic: t27 analog emulation v0.1 -- SPICE netlist + IHP SG13G2 models to a t27 spec, on the FPGA per corner #10486

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docs(analog): competitors, prior art and ten weaknesses of the analog-emulation approach (Closes #10502) - #10506

docs(analog): competitors, prior art and ten weaknesses of the analog-emulation approach (Closes #10502)#10506
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