TB releases

TB 3.2.0

2026-10-31T00:00:00Z

TB 3.2.0

31 October 2026

Minor

A faster engine, a profiler, an event loop and process workers for concurrency, streaming for files of any size, Mach-O and much more of YARA, Sigma correlations, official ATT&CK data, debugging from VS Code, and a playground that never freezes the page.

Added

A faster engine: code that runs often is translated into a quicker form, more than twice as fast as TB 3.0 on the benchmark set. TB_JIT=off turns it off.
tb profile shows where a program spends its time, per function and per line, with --html for a flame graph and a list of the largest values.
parallel.loop runs async fn tasks, servers and network calls on one event loop, holding thousands of connections without a thread each. parallel.group and parallel.timeout cancel work cleanly.
parallel.processes spreads CPU-heavy work across processes, with parallel.shared_queue to pass values between them.
logs.stream, logs.each, pcap.each and evtx.each read files of any size with flat memory, and .gz and .zip files are read directly.
The macho library reads macOS executables; pe adds imphash, the Rich header, resources and code-signature details; elf adds symbol versions and a hardening report. file-inspector shows all of them.
scan accepts much more of the YARA language: xor, base64, wide and nocase regexes, counts and offsets, integer readers, loops and the pe, elf and math modules.
Sigma correlation rules and | near convert for Splunk, KQL and the new ES|QL backend, with field maps for more Sentinel tables.
Official MITRE ATT&CK data (version 20.0), and new intel providers (AlienVault OTX, GreyNoise, Shodan) and SIEM senders (QRadar, Chronicle).
Editor support: rename and find references across files, quick fixes, organise imports, [fmt] options in tb.toml, and debugging from VS Code through tb debug --dap.
Desktop apps accept files dropped on the window and show a tray icon on Windows and macOS; every control can be reached with Tab.
The playground and Run buttons run in a background worker: output appears as it is printed, Stop works at once, and ask() reads answers inline.

Changed

evtx reads real Windows logs the way Windows shows them: record_id is the event's own record ID and empty values are kept. Damaged chunks and records in slack space can be recovered with {"recover": true}.
The legacy ATT&CK tactic name defense-evasion covers both of its v20 successors, Stealth and Defense Impairment.

Security

Hostile files and rules are bounded: packet captures, PE, Mach-O, EVTX and compressed logs have size and time limits, and YARA refuses patterns that could run for minutes.
Sigma field names are checked and quoted, so a rule can't add commands to a converted query.
API keys and tokens are never sent on to another site when a server redirects.

TB 3.1.0

2026-10-31T00:00:00Z

TB 3.1.0

31 October 2026

Minor

Named inputs for standard-library functions, packet-capture stream reassembly with HTTP file extraction, seven more log formats for security teams, and clearer messages across the tools.

Added

Standard-library functions take named inputs, like functions you write: parallel.map(scan, hosts, workers = 8), round(x, digits = 2). A misspelled name gets a "Did you mean" hint, and tb check and the language server know the names too.
pcap.streams reassembles TCP connections (out-of-order, repeated and missing segments), pcap.defragment rebuilds fragmented IPv4 and IPv6 packets, and pcap.http_exchanges and pcap.http_objects pair HTTP requests with responses and pull out transferred files with their SHA-256 and MD5. The pcap-triage app lists files sent over HTTP.
logs.read recognises Zeek (TSV and JSON), Suricata EVE, AWS CloudTrail, Okta System Log, Microsoft 365 audit logs (JSON and CSV), CEF and LEEF, and gives Sysmon events common field names such as process, command_line and hashes.
Descriptions for Sysmon events and PowerShell script and module logging (4103, 4104) when reading EVTX files.
A globals command in tb debug.
JSON parse errors carry data_line and data_column, so a program can say where a config file is broken.

Changed

locals in tb debug shows only the current function's inputs and variables.
tb add prints the short import line, such as import "tb-tables" as tb_tables.
let a, b = 0, 1 explains how to write it: let a, b = [0, 1].

Fixed

Sigma rules converted to KQL use real columns of Microsoft Sentinel's Syslog table, reading the user, address and action out of SyslogMessage, and filter on the auth facility.

TB 3.0.0

2026-10-27T00:00:00Z

TB 3.0.0

27 October 2026

Major

The biggest TB release so far: classes, pattern matching, generators and tasks in the same friendly language, a bytecode virtual machine, a full set of developer tools and 43 standard libraries. Read What's new in TB 3.0 for examples you can run.

Added

class with fields, methods, static members, extends and super, plus enum and match with value, range, list, map, type and class patterns.
Default, named and ...rest arguments, lambdas, destructuring, spread, const, and if ... then ... else as an expression.
Whole numbers and fractions kept apart, hex and binary literals, format specs in f-strings, ranges, slices and a bytes type.
Errors with a kind (catch err: ParseError), finally, defer, assert, generators with yield, and tasks with async fn and await.
export and from ... import for modules.
A bytecode virtual machine that runs programs faster; the tree-walking engine stays available with TB_ENGINE=tree.
Developer tools: tb fmt, tb check, tb debug, tb test --coverage, tb doc, tb build, tb lsp and a VS Code extension.
Packages: tb add, tb publish and the TB Package Index.
23 new libraries, for 43 in all, covering binary formats, packet captures, SIEM queries, threat intelligence, data and networking.
New desktop and security apps in the examples gallery.

Breaking

New reserved words (class, match, from, is, const and others) can't be used as names any more; TB suggests another name.
/ always gives an exact fraction; it still displays as before.
Errors raised by libraries now have specific kinds. See Moving from 2.x for every change and its fix.

TB 2.0.1

2026-10-26T00:00:00Z

TB 2.0.1

26 October 2026

Patch

A documentation release with no language changes.

Changed

Sample programs and documentation are neutral and ready for everyone.
The first program is now welcome.tb, a short tour of TB.

TB 2.0.0

2026-10-26T00:00:00Z

TB 2.0.0

26 October 2026

MajorNot published

TB becomes a real language for desktop apps and security work. This version was never offered as a download; 2.0.1, released the same day, was the first public 2.x release.

Added

Maps, methods, f-strings, modules and import.
try, catch and throw for error handling.
Twenty standard libraries, including a desktop GUI, logs, detection rules, IOCs, hashing, networking and threat intelligence.
A Windows installer and a set of ready-made security apps.