REGO

Generated by scripts/gen-format-pages.py from docs/data/format-metadata/, FILE_FORMATS.csv and docs/formats-master.csv. Do not edit by hand: change the source, then run the script.

OPA Rego Preview.

At a glance

How much Poka reads

B2 Broad. The common content of the current and the common older versions is decoded. Some named features or versions are not, and are listed.

Confidence: medium (the reviewer read the code). Basis: Reviewed 2026-10-26: read parsers/poka-rego/src/main.rs (149 lines), plugin.json and poka-viewers' poka-text-viewer (plain text; it ignores the language hint). No unit tests or tests/samples.rs, and the corpus has no .rego sample. Covers .rego. The whole source is shown as text, under a summary line with the package, the number of imports and the rule heads found (up to 8 named). Judgement: B2, because the full text is shown; the gaps are presentation, limits and the heuristic summary.

What Poka does not read

• Shown as plain text without syntax highlighting
• Rule heads are found by a heuristic (an identifier at the start of a line followed by =, :=, (, [ or {), so some rules and some non-rules are miscounted
• A # inside a string is taken as the start of a comment when finding rule heads (judgement from the code)
• The text shown stops at 200,000 characters and files over 4 MiB are cut (both flagged)
• Text that is not UTF-8 is decoded with replacement characters

Libraries

Libraries Poka uses or has assessed for this format, with the status, licence and language the registry records.

• regorus (candidate; MIT; Rust; https://github.com/microsoft/regorus) — Rego interpreter (no_std capable) with lex, parse and ast commands; targets OPA v1.2.0 compatibility.
• Open Policy Agent (ast package) (candidate; Apache-2.0; Go; https://pkg.go.dev/github.com/open-policy-agent/opa/v1/ast) — Reference implementation; ast package provides a Rego parser (ParseModule) and compiler.

Sources

• parsers/poka-rego/src/main.rs
• parsers/poka-rego/plugin.json