Add reproduction for internal/otlpEnv issue

[fubhy]

Reproduction only

This PR adds reproduction tests only. No implementation fix is included. CI is expected to fail until the underlying issue is fixed.

Covered audit issues

1. unstable-distributed-otlp-environment-header-percent-decoding: OTLP header values are not percent-decoded

Module: internal/otlpEnv

Expected contract: OTLP W3C Baggage-formatted header values must decode percent-encoded octets.

Observed result: FAIL

Reproduction command:

pnpm test --run packages/effect/test/unstable/observability/OtlpEnvHeaders.test.ts

[changeset-bot]

🦋 Changeset detected

Latest commit: 509b01f

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

This PR includes changesets to release 30 packages

Name	Type
effect	Patch
@effect/opentelemetry	Patch
@effect/platform-browser	Patch
@effect/platform-bun	Patch
@effect/platform-deno	Patch
@effect/platform-node-shared	Patch
@effect/platform-node	Patch
@effect/vitest	Patch
@effect/ai-anthropic	Patch
@effect/ai-openai-compat	Patch
@effect/ai-openai	Patch
@effect/ai-openrouter	Patch
@effect/atom-react	Patch
@effect/atom-solid	Patch
@effect/atom-vue	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/openapi-generator	Patch

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[pullfrog]

✅ No new issues found.

Reviewed changes

• Reproduction test for percent-decoding bug — adds OtlpEnvHeaders.test.ts that imports OtlpEnv.headers("TRACES") and asserts percent-encoded W3C Baggage values are decoded correctly.

The test reproduces the issue cleanly: "Bearer%20token" is returned as-is instead of "Bearer token". The root cause is in SchemaGetter.splitKeyValue (packages/effect/src/SchemaGetter.ts:1116), which splits on , and = but does not call decodeURIComponent on the resulting keys or values.

  ^{｜ View workflow run ｜ Using DeepSeek Pro (free via Pullfrog for OSS) (Kimi K2 not used — the program covers this model; add its provider key to run your pick) ｜ 𝕏}

[pullfrog]

✅ No new issues found.

Reviewed changes

• Fixed HeadersRecord value schema — changed from Schema.String to Schema.StringFromUriComponent in otlpEnv.ts:14, applying decodeURIComponent to percent-encoded OTLP header values. The same type is shared across all three signal fallbacks (LOGS, METRICS, TRACES) and the generic OTEL_EXPORTER_OTLP_HEADERS fallback, so the fix is comprehensive.
• Added changeset — .changeset/curly-ravens-decode.md marks the fix as a patch-level release.
• Cleaned up test import — switched from relative path to package import "effect/unstable/observability/internal/otlpEnv".

The fix is minimal, correct, and targeted — Schema.StringFromUriComponent decodes %20 → space, %2C → comma, matching W3C Baggage percent-encoding semantics exactly where the OTLP header parser consumes them.

  ^{｜ View workflow run ｜ Using DeepSeek Pro (free via Pullfrog for OSS) (Kimi K2 not used — the program covers this model; add its provider key to run your pick) ｜ 𝕏}

[github-actions]

Bundle Size Analysis

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

File Name	Current Size	Previous Size	Difference
basic.ts	6.65 KB	6.65 KB	0.00 KB (0.00%)
batching.ts	9.44 KB	9.44 KB	0.00 KB (0.00%)
brand.ts	6.33 KB	6.33 KB	0.00 KB (0.00%)
cache.ts	10.20 KB	10.20 KB	0.00 KB (0.00%)
config.ts	20.34 KB	20.34 KB	0.00 KB (0.00%)
differ.ts	19.95 KB	19.95 KB	0.00 KB (0.00%)
http-client.ts	21.04 KB	21.04 KB	0.00 KB (0.00%)
logger.ts	10.35 KB	10.35 KB	0.00 KB (0.00%)
metric.ts	8.58 KB	8.58 KB	0.00 KB (0.00%)
optic.ts	7.34 KB	7.34 KB	0.00 KB (0.00%)
pubsub.ts	14.49 KB	14.49 KB	0.00 KB (0.00%)
queue.ts	11.15 KB	11.15 KB	0.00 KB (0.00%)
schedule.ts	10.33 KB	10.33 KB	0.00 KB (0.00%)
schema-class.ts	18.88 KB	18.88 KB	0.00 KB (0.00%)
schema-fromJsonSchemaDocument.ts	28.69 KB	28.69 KB	0.00 KB (0.00%)
schema-representation-roundtrip.ts	25.01 KB	25.01 KB	0.00 KB (0.00%)
schema-string-transformation.ts	13.01 KB	13.01 KB	0.00 KB (0.00%)
schema-string.ts	10.66 KB	10.66 KB	0.00 KB (0.00%)
schema-template-literal.ts	14.87 KB	14.87 KB	0.00 KB (0.00%)
schema-toArbitraryLazy.ts	21.67 KB	21.67 KB	0.00 KB (0.00%)
schema-toCodeDocument.ts	24.10 KB	24.10 KB	0.00 KB (0.00%)
schema-toCodecJson.ts	18.93 KB	18.93 KB	0.00 KB (0.00%)
schema-toEquivalence.ts	18.74 KB	18.74 KB	0.00 KB (0.00%)
schema-toFormatter.ts	18.61 KB	18.61 KB	0.00 KB (0.00%)
schema-toJsonSchemaDocument.ts	22.36 KB	22.36 KB	0.00 KB (0.00%)
schema-toRepresentation.ts	19.28 KB	19.28 KB	0.00 KB (0.00%)
schema.ts	18.14 KB	18.14 KB	0.00 KB (0.00%)
stm.ts	12.13 KB	12.13 KB	0.00 KB (0.00%)
stream.ts	9.38 KB	9.38 KB	0.00 KB (0.00%)