tlaplus/tlapm

View on GitHub

The TLA⁺ Proof Manager

Stars: 124
Forks: 45
Open beginner issues: 0
Indexed issues: 69

Dominant language: OCaml
License: BSD-2-Clause
Last GitHub push: Sep 17, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

Beginner friendly Everything

Open All

69 open issues indexed

Proof fails depending on surrounding unrelated context Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

tlaplus/tlapm#291 · 2 comments · Opened Sep 7, 2026
Feature request: CLI flag to filter obligations by lemma/theorem name, not line number Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 52/100

tlaplus/tlapm#290 · 1 reaction · Opened Aug 31, 2026
tlapm exits 0 when proof obligations fail, so CI reports success on a broken proof Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

tlaplus/tlapm#287 · 6 comments · Opened Jul 29, 2026
tlapm scales poorly on INSTANCE/refinement-heavy specs (large per-obligation contexts) Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

tlaplus/tlapm#286 · 4 comments · 5 reactions · Opened Jul 27, 2026
`--line` should fail when no proof obligation is selected Open

enhancement

Difficulty 3/5 1-2 days Newbie friendliness 55/100

tlaplus/tlapm#276 · Opened Jun 7, 2026
Learnings AI+TLAPS (TLAiPS) Open

documentation

Difficulty 5/5 Over a week Newbie friendliness 35/100

tlaplus/tlapm#272 · 3 comments · 3 reactions · Opened May 14, 2026
tlapm ending abnormally with File "src/expr/e_levels.ml", line 933, characters 12-18: Assertion failed Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 42/100

tlaplus/tlapm#270 · 2 comments · Opened May 14, 2026
tlapm ending abnormally with Tlapm_lib__Util.Internal_timeout Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

tlaplus/tlapm#269 · 1 comment · Opened May 13, 2026
LSP: Proof decomposition should push `'` down Open

enhancement

tlaplus/tlapm#261 · 1 assignee · Opened Apr 15, 2026
New warning ld: warning: ignoring duplicate libraries: '-lc++', '-lpthread' Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

tlaplus/tlapm#259 · 1 reaction · Opened Apr 13, 2026
TLAPM library modules depend on community modules Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

tlaplus/tlapm#252 · 2 comments · Opened Mar 1, 2026
Can't solve even when conclusion matches assumption exactly Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

tlaplus/tlapm#247 · 3 comments · Opened Dec 19, 2025
When run from a different directory, TLAPM cannot handle leading text on modules imported using EXTENDS Open

syntax parser

Difficulty 3/5 1-2 days Newbie friendliness 38/100

tlaplus/tlapm#245 · Opened Dec 16, 2025
Tuple quantification should not be supported in `ASSUME NEW <<x, y>> \in S` statements Open

bug syntax parser

Difficulty 4/5 3-5 days Newbie friendliness 45/100

tlaplus/tlapm#242 · 2 comments · Opened Oct 31, 2025
TLAPM parser incorrectly allows `LAMBDA` as expression Open

bug syntax parser

Difficulty 4/5 3-5 days Newbie friendliness 45/100

tlaplus/tlapm#238 · Opened Sep 4, 2025
TLAPM parser incorrectly accepts recursive operator when it is a function literal Open

bug semantic checker syntax parser

Difficulty 4/5 3-5 days Newbie friendliness 45/100

tlaplus/tlapm#237 · Opened Sep 4, 2025
TLAPM parser silently drops expressions of form `e \in S` when parsing finite set literals Open

bug syntax parser

Difficulty 3/5 1-2 days Newbie friendliness 55/100

tlaplus/tlapm#235 · Opened Jul 28, 2025
Replace TLAPM parser with SANY Open

semantic checker syntax parser

Difficulty 5/5 Over a week Newbie friendliness 20/100

tlaplus/tlapm#213 · 9 comments · Opened May 27, 2025
Error while proving `Some(x, op)' = Some(x', op')` when `op` is an operator. Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

tlaplus/tlapm#207 · Opened Mar 15, 2025
Support finding relevant facts and definitions Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

tlaplus/tlapm#206 · 2 comments · 4 reactions · Opened Mar 3, 2025
Reimplement "Decompose Proof" Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

tlaplus/tlapm#205 · 1 comment · Opened Mar 3, 2025
Coalescing has issues with abstracting bound variables Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 52/100

tlaplus/tlapm#197 · 1 comment · Opened Jan 28, 2025
Better approximation of boxed contexts Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 48/100

tlaplus/tlapm#196 · 1 comment · Opened Jan 28, 2025
LSP: Don't re-parse dependent modules if they are unchanged. Open

tlaplus/tlapm#187 · 1 assignee · Opened Dec 26, 2024
Latest pre-release does not work on non-recent Linux (e.g. Codespace default) due to GLIBC version Open

Difficulty 4/5 3-5 days Newbie friendliness 28/100

tlaplus/tlapm#185 · 1 comment · Opened Dec 10, 2024
Reduce size of TLAPM release bundle Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

tlaplus/tlapm#181 · 5 comments · Opened Nov 27, 2024
TLAPM parser fails to parse `!!` operator in nonfix form due to lexical conflict with `!` subexpression syntax Open

bug syntax parser

Difficulty 3/5 1-2 days Newbie friendliness 48/100

tlaplus/tlapm#174 · Opened Oct 29, 2024
TLAPM fails to parse decimal numbers of form `.12345` without leading zero Open

bug syntax parser

Difficulty 4/5 3-5 days Newbie friendliness 30/100

tlaplus/tlapm#173 · Opened Oct 29, 2024
TLAPM incorrectly accepts some unit-level definitions prefixed by `LOCAL` Open

bug syntax parser

Difficulty 3/5 1-2 days Newbie friendliness 45/100

tlaplus/tlapm#172 · Opened Oct 29, 2024
TLAPM parser accepts incorrect use of labels that break operator precedence Open

bug syntax parser

Difficulty 3/5 1-2 days Newbie friendliness 45/100

tlaplus/tlapm#169 · Opened Oct 24, 2024
TLAPM parser accepts invalid use of parentheses to escape conjunction list Open

bug syntax parser

Difficulty 3/5 1-2 days Newbie friendliness 42/100

tlaplus/tlapm#168 · Opened Oct 24, 2024
TLAPM parser does not accept `INSTANCE` proof step type Open

bug syntax parser

Difficulty 3/5 1-2 days Newbie friendliness 45/100

tlaplus/tlapm#167 · Opened Oct 24, 2024
TLAPM parser does not accept `MODULE` references in several places Open

bug syntax parser

Difficulty 5/5 Over a week Newbie friendliness 25/100

tlaplus/tlapm#166 · 1 comment · Opened Oct 24, 2024
TLAPM parser does not accept proof step references in `QED BY` with implicit `<*>` proof level Open

bug syntax parser

Difficulty 3/5 1-2 days Newbie friendliness 35/100

tlaplus/tlapm#165 · 1 comment · Opened Oct 24, 2024
TLAPM syntax parser does not support bitfield number formats Open

bug syntax parser

Difficulty 3/5 1-2 days Newbie friendliness 45/100

tlaplus/tlapm#163 · Opened Oct 24, 2024
TLAPM syntax parser treats Cartesian products differently from infix operators Open

bug syntax parser

Difficulty 3/5 1-2 days Newbie friendliness 45/100

tlaplus/tlapm#162 · Opened Oct 24, 2024
TLAPM syntax parser does not accept prefix operators as higher-level operator parameters Open

bug syntax parser

Difficulty 3/5 1-2 days Newbie friendliness 45/100

tlaplus/tlapm#161 · Opened Oct 24, 2024
Pin dependency versions for dune build Open

Difficulty 3/5 1-2 days Newbie friendliness 38/100

tlaplus/tlapm#158 · 6 comments · Opened Oct 16, 2024
Syntax error when parameterized refinement occurs in subscript Open

bug syntax parser

Difficulty 4/5 3-5 days Newbie friendliness 35/100

tlaplus/tlapm#156 · 1 comment · Opened Sep 19, 2024
Add LSP command to add DEFs to a leaf proof for ExpandENABLED to work. Open

enhancement

tlaplus/tlapm#153 · 2 comments · 1 assignee · Opened Sep 12, 2024
tlapm ending abnormally with Invalid_argument("List.combine") in level or arity checking Open

bug semantic checker

tlaplus/tlapm#151 · 8 comments · 1 reaction · 1 assignee · Opened Sep 3, 2024
Regression in BlockingQueue proof Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

tlaplus/tlapm#150 · 2 comments · Opened Sep 2, 2024
TLAPS proves `~(x = TRUE) <=> (x = FALSE)` in released versions Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

tlaplus/tlapm#139 · 3 comments · Opened Jun 7, 2024
Verify proofs in examples/ directory as part of PR workflow Open

enhancement testing

Difficulty 4/5 3-5 days Newbie friendliness 42/100

tlaplus/tlapm#136 · 7 comments · Opened Jun 6, 2024
LSP: Make error position more precise in the case of incomplete expressions. Open

tlaplus/tlapm#132 · 1 assignee · Opened May 28, 2024
LSP: Only show "RECURSIVE unsupported" warnings if the module contains proofs. Open

tlaplus/tlapm#129 · 1 assignee · Opened May 13, 2024
LSP: Some errors are shown on wrong files. Open

tlaplus/tlapm#128 · 1 assignee · Opened May 5, 2024
useless quantifier prevents new SMT from proving obligation Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

tlaplus/tlapm#121 · Opened Feb 26, 2024
Variable renames in LAMBDA Open

bug translator

Difficulty 4/5 3-5 days Newbie friendliness 42/100

tlaplus/tlapm#120 · 3 comments · Opened Feb 15, 2024
Module references considered differently SANY and TLAPM Open

bug semantic checker

Difficulty 4/5 3-5 days Newbie friendliness 25/100

tlaplus/tlapm#119 · 7 comments · 1 reaction · Opened Feb 10, 2024

tlaplus/tlapm

Get new issues in your inbox