[fubhy]

Summary

Yaml.parse failed on moby's Docker Engine API document with SyntaxError: Expected ':' at flow offset 1. The cause is a JSON-style flow mapping split across lines:

        example:
          {
            "active_anon": 1572864,
            "active_file": 5115904
          }

The parser handed only the first line of a flow collection to the flow parser. Now the flow parser pulls in continuation lines while it is inside a collection:

• Continuation lines must be indented past the parent node.
• The closing bracket may also sit at the parent's indentation. YAML 1.2 doesn't allow that, but it's the common hand-written layout and yaml and libyaml accept it. The module doc states this difference.
• Comment and blank lines inside the collection are skipped, and multiline plain scalars are folded.
• Multiline quoted scalars inside flow collections are still unsupported and listed in the module doc.

parse("a:\n  {\n    \"b\": 1\n  }\n")   // before: SyntaxError → after: { a: { b: 1 } }
parse("a: [\n  1,\n  2\n]\n")          // before: SyntaxError → after: { a: [1, 2] }

Tests

The existing tests are unchanged. A new multiline flow collections block covers the moby shape, a closing bracket at the parent's indentation, nested collections, a sibling key after the collection, comment and blank lines, and plain-scalar folding. It also checks that three inputs are rejected: a continuation line at the parent's indentation, an unterminated collection before a sibling key, and content after the closing bracket.

Merge Danger

Door: two-way

Parser-only change behind the existing parse signature.

Blast Radius: additive

Only input that used to fail now parses. Valid single-line input is unaffected.

Closes EFF-2728

[changeset-bot]

🦋 Changeset detected

Latest commit: d1562a4

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 33 packages

Name	Type
effect	Patch
@effect/opentelemetry	Patch
@effect/vitest	Patch
@effect/ai-anthropic	Patch
@effect/ai-cloudflare	Patch
@effect/ai-openai-compat	Patch
@effect/ai-openai	Patch
@effect/ai-openrouter	Patch
@effect/ai-typesafe	Patch
@effect/atom-react	Patch
@effect/atom-solid	Patch
@effect/atom-vue	Patch
@effect/platform-browser	Patch
@effect/platform-bun	Patch
@effect/platform-deno	Patch
@effect/platform-node-shared	Patch
@effect/platform-node	Patch
@effect/sql-clickhouse	Patch
@effect/sql-d1	Patch
@effect/sql-libsql	Patch
@effect/sql-mssql	Patch
@effect/sql-mysql2	Patch
@effect/sql-pg	Patch
@effect/sql-pglite	Patch
@effect/sql-sqlite-bun	Patch
@effect/sql-sqlite-do	Patch
@effect/sql-sqlite-node	Patch
@effect/sql-sqlite-react-native	Patch
@effect/sql-sqlite-wasm	Patch
@effect/docgen	Patch
@effect/doctest	Patch
@effect/graphql-generator	Patch
@effect/openapi-generator	Patch

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[github-actions]

Bundle Size Analysis

Generated from PR build output; treat the content below as untrusted.

File Name	Current Size	Previous Size	Difference
arbitrary-combinators.ts	39.13 KB	39.13 KB	0.00 KB (0.00%)
basic.ts	7.04 KB	7.04 KB	0.00 KB (0.00%)
batching.ts	10.91 KB	10.91 KB	0.00 KB (0.00%)
brand.ts	6.71 KB	6.71 KB	0.00 KB (0.00%)
cache.ts	11.35 KB	11.35 KB	0.00 KB (0.00%)
config.ts	22.51 KB	22.51 KB	0.00 KB (0.00%)
differ.ts	21.66 KB	21.66 KB	0.00 KB (0.00%)
http-client.ts	26.02 KB	26.02 KB	0.00 KB (0.00%)
http-router.ts	35.69 KB	35.69 KB	0.00 KB (0.00%)
logger.ts	11.70 KB	11.70 KB	0.00 KB (0.00%)
metric.ts	9.27 KB	9.27 KB	0.00 KB (0.00%)
optic.ts	6.93 KB	6.93 KB	0.00 KB (0.00%)
pubsub.ts	15.79 KB	15.79 KB	0.00 KB (0.00%)
queue.ts	12.61 KB	12.61 KB	0.00 KB (0.00%)
schedule.ts	11.60 KB	11.60 KB	0.00 KB (0.00%)
schema-bigdecimal.ts	13.84 KB	13.84 KB	0.00 KB (0.00%)
schema-binary.ts	40.58 KB	40.58 KB	0.00 KB (0.00%)
schema-class.ts	21.36 KB	21.36 KB	0.00 KB (0.00%)
schema-fromJsonSchemaDocument.ts	32.33 KB	32.33 KB	0.00 KB (0.00%)
schema-representation-roundtrip.ts	27.52 KB	27.52 KB	0.00 KB (0.00%)
schema-string-transformation.ts	15.09 KB	15.09 KB	0.00 KB (0.00%)
schema-string.ts	12.10 KB	12.10 KB	0.00 KB (0.00%)
schema-template-literal.ts	16.02 KB	16.02 KB	0.00 KB (0.00%)
schema-toArbitrary.ts	38.66 KB	38.66 KB	0.00 KB (0.00%)
schema-toCodeDocument.ts	25.71 KB	25.71 KB	0.00 KB (0.00%)
schema-toCodecJson.ts	20.59 KB	20.59 KB	0.00 KB (0.00%)
schema-toEquivalence.ts	20.77 KB	20.77 KB	0.00 KB (0.00%)
schema-toFormatter.ts	20.88 KB	20.88 KB	0.00 KB (0.00%)
schema-toJsonSchemaDocument.ts	25.46 KB	25.46 KB	0.00 KB (0.00%)
schema-toRepresentation.ts	20.88 KB	20.88 KB	0.00 KB (0.00%)
schema.ts	20.55 KB	20.55 KB	0.00 KB (0.00%)
stm.ts	13.89 KB	13.89 KB	0.00 KB (0.00%)
stream.ts	10.14 KB	10.14 KB	0.00 KB (0.00%)