mise (and other TOML managers) fail to parse TOML 1.1 multi-line inline tables — parser pinned to tomlVersion 1.0

[florianwakam]

Previously raised as #44344, redirected here per repo policy (issues are maintainer-created). Keeping the full technical write-up for triage.

Idea

Support TOML 1.1 in Renovate's TOML parser so that .mise.toml (and other TOML) config files using TOML 1.1 multi-line inline tables are parsed. These are accepted by mise itself, but Renovate silently skips them with Invalid TOML, so no update PRs are produced for the tools declared in those files.

Affected manager

mise — and more broadly every manager that relies on the shared lib/util/toml.ts parse() helper.

Reproduction

.mise.toml:

[tools]
lefthook = {
  version = "2.1.3",
  postinstall = "lefthook install"
}
just = "1.48.1"
gh = "2.91.0"

Renovate logs:

DEBUG: Error parsing Mise file. (repository=<org>/<repo>, packageFile=.mise.toml)
       "err": {"message": "Schema error", "issues": "Invalid TOML"}
       ZodError: Schema error
           at _.inst.safeParse (…/zod/v4/classic/schemas.js)
           at parseTomlFile (…/renovate/lib/modules/manager/mise/utils.ts)

and the file is skipped — no updates are proposed for just, gh, or lefthook.

mise itself parses the same file without error (mise config ls reports lefthook, just, gh).

Expected vs. actual

• Expected: Renovate parses the file, since mise accepts it.
• Actual: Renovate reports Invalid TOML and skips the file.

Root cause

lib/util/toml.ts parses with toml-eslint-parser pinned to TOML 1.0:

// renovate/lib/util/toml.ts
import { getStaticTOMLValue, parseTOML } from "toml-eslint-parser";
function parse(input) {
  return getStaticTOMLValue(parseTOML(input, { tomlVersion: "1.0" }));
}

TOML 1.0 forbids newlines inside inline tables. TOML 1.1.0 (released 2025-12-18) relaxes this — "Allow newlines and trailing commas in inline tables" (toml-lang/toml#904). mise targets TOML 1.1, so mise-valid config is rejected by Renovate.

Suggested fix

Bump tomlVersion from "1.0" to "1.1" in lib/util/toml.ts. TOML 1.1 is a parsing superset of 1.0, so this only makes Renovate more lenient (no previously-valid file becomes invalid). Verified against the already-bundled toml-eslint-parser@1.0.3:

tomlVersion=1.0 -> FAIL  No newlines are allowed between the curly braces unless they are valid within a value
tomlVersion=1.1 -> OK    tools=lefthook,just

Versions

• Renovate: 43.212.4
• toml-eslint-parser: 1.0.3
• mise: 2026.6.10

[RahulGautamSingh]

Sounds good let's wait for maintainers thoughts