diff --git a/crates/ourios-ingester/src/lib.rs b/crates/ourios-ingester/src/lib.rs
index b7a414c22..f62f2b03e 100644
--- a/crates/ourios-ingester/src/lib.rs
+++ b/crates/ourios-ingester/src/lib.rs
@@ -4,9 +4,11 @@
 //! durably (WAL-before-ack), lands Parquet in object storage, and runs
 //! background maintenance. It spans three RFCs at different maturities:
 //!
-//! - **OTLP receiver** (RFC 0003, `drafted`) — the gRPC/HTTP ingest
-//!   front door + mining pipeline. [`receiver`] is a placeholder until
-//!   RFC 0003 reaches `red`; no ingest is implemented here yet.
+//! - **OTLP receiver** (RFC 0003, `specified` → `red`) — the gRPC/HTTP
+//!   ingest front door + mining pipeline. The §5 acceptance criteria
+//!   (RFC0003.1–.15) are now enumerated as `#[ignore]`'d tests under
+//!   `tests/rfc0003_*`; [`receiver`] stays a placeholder until the
+//!   green slices land the ingest pipeline + WAL-before-ack path.
 //! - **WAL-before-ack** (RFC 0008 / `CLAUDE.md` §3.4) — durability
 //!   before acknowledgement, via the shipped `ourios-wal`. Wired into
 //!   the ingest path once the receiver lands; not exercised here.
diff --git a/crates/ourios-ingester/src/receiver.rs b/crates/ourios-ingester/src/receiver.rs
index cefea3c02..4afe82e23 100644
--- a/crates/ourios-ingester/src/receiver.rs
+++ b/crates/ourios-ingester/src/receiver.rs
@@ -1,9 +1,11 @@
-//! OTLP receiver — **placeholder** (RFC 0003, `drafted`).
+//! OTLP receiver — **placeholder** (RFC 0003, `specified` → `red`).
 //!
 //! The ingest front door (OTLP logs over gRPC/HTTP), the Drain-derived
 //! mining pipeline, and the WAL-before-ack durability path
-//! (`CLAUDE.md` §3.4, RFC 0008) live here once RFC 0003 reaches `red`.
-//! Nothing is implemented yet: this scaffold lands the crate and the
-//! background compaction runner ([`crate::compactor`]) only, so the
-//! receiver is deliberately empty rather than a half-built ingest path
-//! ahead of its RFC.
+//! (`CLAUDE.md` §3.4, RFC 0008) live here. The RFC is now `specified`,
+//! and its §5 acceptance criteria (RFC0003.1–.15) are enumerated as
+//! `#[ignore]`'d tests under `crates/ourios-ingester/tests/rfc0003_*` —
+//! the `red` gate. This module stays deliberately empty until the green
+//! slices land the ingest pipeline (wire decode → tenant fan-out →
+//! WAL-before-ack → miner), rather than a half-built path ahead of
+//! review.
diff --git a/crates/ourios-ingester/tests/rfc0003_10_dropped_attributes_count.rs b/crates/ourios-ingester/tests/rfc0003_10_dropped_attributes_count.rs
new file mode 100644
index 000000000..1d9f4e5fc
--- /dev/null
+++ b/crates/ourios-ingester/tests/rfc0003_10_dropped_attributes_count.rs
@@ -0,0 +1,16 @@
+//! RFC0003.10 — `dropped_attributes_count` preserved verbatim.
+//!
+//! Red gate (`specified → red`): `#[ignore]`'d until the receiver
+//! lands.
+
+/// Scenario RFC0003.10 — `dropped_attributes_count` preserved verbatim.
+/// See `docs/rfcs/0003-otlp-receiver.md` §5.
+#[ignore = "RFC 0003 red gate — implementation pending (RFC0003.10)"]
+#[test]
+fn rfc0003_10_dropped_attributes_count_is_reflected_not_recomputed() {
+    unimplemented!(
+        "RFC0003.10 — a wire dropped_attributes_count of 42 yields \
+         OtlpLogRecord.dropped_attributes_count == 42 exactly; the receiver \
+         reflects the wire claim and never recomputes it."
+    );
+}
diff --git a/crates/ourios-ingester/tests/rfc0003_11_transport_errors.rs b/crates/ourios-ingester/tests/rfc0003_11_transport_errors.rs
new file mode 100644
index 000000000..dfb687344
--- /dev/null
+++ b/crates/ourios-ingester/tests/rfc0003_11_transport_errors.rs
@@ -0,0 +1,18 @@
+//! RFC0003.11 — Transport-level errors are controlled, not panics.
+//!
+//! Red gate (`specified → red`): `#[ignore]`'d until the receiver
+//! lands.
+
+/// Scenario RFC0003.11 — Transport-level errors are controlled, not panics.
+/// See `docs/rfcs/0003-otlp-receiver.md` §5.
+#[ignore = "RFC 0003 red gate — implementation pending (RFC0003.11)"]
+#[test]
+fn rfc0003_11_transport_errors_are_controlled() {
+    unimplemented!(
+        "RFC0003.11 — malformed protobuf, oversize body, unrecognised \
+         Content-Type, wrong path, and mid-decode gRPC cancellation each yield a \
+         controlled transport error (gRPC INVALID_ARGUMENT / RESOURCE_EXHAUSTED / \
+         CANCELLED; HTTP 400 / 413 / 415 / 404). No panic, process stays alive, \
+         and no OtlpBatch frame is appended."
+    );
+}
diff --git a/crates/ourios-ingester/tests/rfc0003_12_empty_request_success.rs b/crates/ourios-ingester/tests/rfc0003_12_empty_request_success.rs
new file mode 100644
index 000000000..2008154c8
--- /dev/null
+++ b/crates/ourios-ingester/tests/rfc0003_12_empty_request_success.rs
@@ -0,0 +1,18 @@
+//! RFC0003.12 — Empty `ExportLogsServiceRequest` returns success without WAL write.
+//!
+//! Red gate (`specified → red`): `#[ignore]`'d until the receiver
+//! lands.
+
+/// Scenario RFC0003.12 — Empty `ExportLogsServiceRequest` returns success without WAL write.
+/// See `docs/rfcs/0003-otlp-receiver.md` §5.
+#[ignore = "RFC 0003 red gate — implementation pending (RFC0003.12)"]
+#[test]
+fn rfc0003_12_empty_request_succeeds_without_persisting() {
+    unimplemented!(
+        "RFC0003.12 — a zero-LogRecord request (empty resource_logs; empty \
+         scope_logs; empty log_records — all three shapes) returns success with \
+         partial_success unset (OTLP 'empty is success'), and invokes neither \
+         Wal::append/sync nor MinerCluster::ingest (asserted via a counting Wal \
+         wrapper)."
+    );
+}
diff --git a/crates/ourios-ingester/tests/rfc0003_13_compression.rs b/crates/ourios-ingester/tests/rfc0003_13_compression.rs
new file mode 100644
index 000000000..fd3e87b6e
--- /dev/null
+++ b/crates/ourios-ingester/tests/rfc0003_13_compression.rs
@@ -0,0 +1,17 @@
+//! RFC0003.13 — Compression over HTTP: identity and gzip MUST be supported.
+//!
+//! Red gate (`specified → red`): `#[ignore]`'d until the receiver
+//! lands.
+
+/// Scenario RFC0003.13 — Compression over HTTP: identity and gzip MUST be supported.
+/// See `docs/rfcs/0003-otlp-receiver.md` §5.
+#[ignore = "RFC 0003 red gate — implementation pending (RFC0003.13)"]
+#[test]
+fn rfc0003_13_identity_and_gzip_decode_equally_unsupported_is_415() {
+    unimplemented!(
+        "RFC0003.13 — the same payload sent with Content-Encoding: identity (or \
+         absent) and with Content-Encoding: gzip yields equal OtlpLogRecord \
+         sequences (both encodings are an OTLP MUST). An unsupported encoding \
+         (zstd, br) is rejected with HTTP 415; zstd is deferred per §9."
+    );
+}
diff --git a/crates/ourios-ingester/tests/rfc0003_14_path_config.rs b/crates/ourios-ingester/tests/rfc0003_14_path_config.rs
new file mode 100644
index 000000000..e76a1bd0e
--- /dev/null
+++ b/crates/ourios-ingester/tests/rfc0003_14_path_config.rs
@@ -0,0 +1,17 @@
+//! RFC0003.14 — Default `/v1/logs` path with configurable override.
+//!
+//! Red gate (`specified → red`): `#[ignore]`'d until the receiver
+//! lands.
+
+/// Scenario RFC0003.14 — Default `/v1/logs` path with configurable override.
+/// See `docs/rfcs/0003-otlp-receiver.md` §5.
+#[ignore = "RFC 0003 red gate — implementation pending (RFC0003.14)"]
+#[test]
+fn rfc0003_14_default_path_and_configurable_override() {
+    unimplemented!(
+        "RFC0003.14 — a POST to the default /v1/logs is handled via the §6.2 HTTP \
+         path; a POST to any other path returns HTTP 404; and an operator-\
+         configured override path (e.g. /otlp/v1/logs) replaces /v1/logs as the \
+         accepted path without changing any other receiver behaviour."
+    );
+}
diff --git a/crates/ourios-ingester/tests/rfc0003_15_concurrent_wal_before_ack.rs b/crates/ourios-ingester/tests/rfc0003_15_concurrent_wal_before_ack.rs
new file mode 100644
index 000000000..9a52a3bd8
--- /dev/null
+++ b/crates/ourios-ingester/tests/rfc0003_15_concurrent_wal_before_ack.rs
@@ -0,0 +1,17 @@
+//! RFC0003.15 — Concurrent `Export` calls each obey WAL-before-ack independently `[§3.4]`.
+//!
+//! Red gate (`specified → red`): `#[ignore]`'d until the receiver
+//! lands.
+
+/// Scenario RFC0003.15 — Concurrent `Export` calls each obey WAL-before-ack independently.
+/// See `docs/rfcs/0003-otlp-receiver.md` §5.
+#[ignore = "RFC 0003 red gate — implementation pending (RFC0003.15)"]
+#[test]
+fn rfc0003_15_concurrent_exports_each_ack_after_their_own_sync() {
+    unimplemented!(
+        "RFC0003.15 — N >= 2 concurrent gRPC Export calls from independent \
+         connections each emit their ack only after their OWN batch's Wal::sync \
+         returns Ok and their own batch's records are durable. A per-call ordering \
+         probe checks the invariant independently per in-flight call."
+    );
+}
diff --git a/crates/ourios-ingester/tests/rfc0003_1_wal_before_ack.rs b/crates/ourios-ingester/tests/rfc0003_1_wal_before_ack.rs
new file mode 100644
index 000000000..e3be01f9f
--- /dev/null
+++ b/crates/ourios-ingester/tests/rfc0003_1_wal_before_ack.rs
@@ -0,0 +1,19 @@
+//! RFC0003.1 — WAL-before-ack `[§3.4]`.
+//!
+//! Red gate (`specified → red`): this acceptance test enumerates
+//! the §5 contract and is `#[ignore]`'d until the OTLP receiver
+//! lands. The implementing PR removes the `#[ignore]` and the
+//! `unimplemented!()` body together.
+
+/// Scenario RFC0003.1 — WAL-before-ack.
+/// See `docs/rfcs/0003-otlp-receiver.md` §5.
+#[ignore = "RFC 0003 red gate — implementation pending (RFC0003.1)"]
+#[test]
+fn rfc0003_1_no_ack_before_every_record_is_durable() {
+    unimplemented!(
+        "RFC0003.1 — a request receives a 2xx / gRPC OK only after every record \
+         in the batch is durably WAL-written (Wal::sync returns Ok). An ordering \
+         probe set after sync returns is asserted true by the response writer and \
+         false by every pre-sync stage (mirrors the RFC0008.1 probe)."
+    );
+}
diff --git a/crates/ourios-ingester/tests/rfc0003_2_crash_before_ack.rs b/crates/ourios-ingester/tests/rfc0003_2_crash_before_ack.rs
new file mode 100644
index 000000000..e83e4b437
--- /dev/null
+++ b/crates/ourios-ingester/tests/rfc0003_2_crash_before_ack.rs
@@ -0,0 +1,19 @@
+//! RFC0003.2 — Crash-before-ack: at-least-once with retry tolerance `[§3.4]`.
+//!
+//! Red gate (`specified → red`): `#[ignore]`'d until the receiver
+//! lands. Per §8 this uses a child-process harness mirroring
+//! `wal_crash_fixture` (PR #126).
+
+/// Scenario RFC0003.2 — Crash-before-ack: at-least-once with retry tolerance.
+/// See `docs/rfcs/0003-otlp-receiver.md` §5.
+#[ignore = "RFC 0003 red gate — implementation pending (RFC0003.2)"]
+#[test]
+fn rfc0003_2_crash_before_ack_is_at_least_once_not_lossy() {
+    unimplemented!(
+        "RFC0003.2 — SIGKILL the receiver between Wal::sync return and ack-emit, \
+         restart, re-issue the export; the post-restart WAL holds TWO OtlpBatch \
+         frames each round-tripping (prost) to a request equivalent to the input. \
+         Asserts no loss + safe retry; explicitly does NOT assert dedup \
+         (at-least-once per the OTLP duplicate-data section)."
+    );
+}
diff --git a/crates/ourios-ingester/tests/rfc0003_3_tenant_fanout.rs b/crates/ourios-ingester/tests/rfc0003_3_tenant_fanout.rs
new file mode 100644
index 000000000..76e6ac2c1
--- /dev/null
+++ b/crates/ourios-ingester/tests/rfc0003_3_tenant_fanout.rs
@@ -0,0 +1,17 @@
+//! RFC0003.3 — Tenant fan-out `[§3.7]`.
+//!
+//! Red gate (`specified → red`): `#[ignore]`'d until the receiver
+//! lands.
+
+/// Scenario RFC0003.3 — Tenant fan-out.
+/// See `docs/rfcs/0003-otlp-receiver.md` §5.
+#[ignore = "RFC 0003 red gate — implementation pending (RFC0003.3)"]
+#[test]
+fn rfc0003_3_two_resources_fan_out_without_cross_contamination() {
+    unimplemented!(
+        "RFC0003.3 — a single export with two ResourceLogs from different sources \
+         produces two distinct per-tenant streams; no record from Resource A \
+         appears in tenant B's stream. Asserted via an instrumented MinerCluster \
+         stub recording every accepted (tenant_id, OtlpLogRecord) pair."
+    );
+}
diff --git a/crates/ourios-ingester/tests/rfc0003_4_tenant_resolution_failure.rs b/crates/ourios-ingester/tests/rfc0003_4_tenant_resolution_failure.rs
new file mode 100644
index 000000000..48437b58c
--- /dev/null
+++ b/crates/ourios-ingester/tests/rfc0003_4_tenant_resolution_failure.rs
@@ -0,0 +1,17 @@
+//! RFC0003.4 — Tenant resolution failure rejects the entire batch `[§3.7]`.
+//!
+//! Red gate (`specified → red`): `#[ignore]`'d until the receiver
+//! lands.
+
+/// Scenario RFC0003.4 — Tenant resolution failure rejects the entire batch.
+/// See `docs/rfcs/0003-otlp-receiver.md` §5.
+#[ignore = "RFC 0003 red gate — implementation pending (RFC0003.4)"]
+#[test]
+fn rfc0003_4_unresolvable_tenant_rejects_whole_batch() {
+    unimplemented!(
+        "RFC0003.4 — an export whose Resource attributes do not resolve to a \
+         configured tenant rule is rejected with a transport-level error naming \
+         the failing Resource and the missing attribute; no records are accepted \
+         and no OtlpBatch frame is appended (all-or-nothing per §6.3)."
+    );
+}
diff --git a/crates/ourios-ingester/tests/rfc0003_5_grpc_http_protobuf_equivalence.rs b/crates/ourios-ingester/tests/rfc0003_5_grpc_http_protobuf_equivalence.rs
new file mode 100644
index 000000000..736c6ae70
--- /dev/null
+++ b/crates/ourios-ingester/tests/rfc0003_5_grpc_http_protobuf_equivalence.rs
@@ -0,0 +1,16 @@
+//! RFC0003.5 — gRPC ≡ HTTP/protobuf decode equivalence.
+//!
+//! Red gate (`specified → red`): `#[ignore]`'d until the receiver
+//! lands.
+
+/// Scenario RFC0003.5 — gRPC ≡ HTTP/protobuf decode equivalence.
+/// See `docs/rfcs/0003-otlp-receiver.md` §5.
+#[ignore = "RFC 0003 red gate — implementation pending (RFC0003.5)"]
+#[test]
+fn rfc0003_5_grpc_and_http_protobuf_decode_identically() {
+    unimplemented!(
+        "RFC0003.5 — a byte-equal protobuf payload delivered over gRPC and over \
+         HTTP/x-protobuf produces the identical in-memory ExportLogsServiceRequest \
+         (per §8, exercised by a proptest strategy over the proto value space)."
+    );
+}
diff --git a/crates/ourios-ingester/tests/rfc0003_6_json_protobuf_equivalence.rs b/crates/ourios-ingester/tests/rfc0003_6_json_protobuf_equivalence.rs
new file mode 100644
index 000000000..ac2086022
--- /dev/null
+++ b/crates/ourios-ingester/tests/rfc0003_6_json_protobuf_equivalence.rs
@@ -0,0 +1,18 @@
+//! RFC0003.6 — HTTP/JSON ↔ gRPC/protobuf equivalence with OTLP-JSON encoding rules.
+//!
+//! Red gate (`specified → red`): `#[ignore]`'d until the receiver
+//! lands.
+
+/// Scenario RFC0003.6 — HTTP/JSON ↔ gRPC/protobuf equivalence with OTLP-JSON encoding rules.
+/// See `docs/rfcs/0003-otlp-receiver.md` §5.
+#[ignore = "RFC 0003 red gate — implementation pending (RFC0003.6)"]
+#[test]
+fn rfc0003_6_json_decodes_to_the_same_anyvalue_tree_as_protobuf() {
+    unimplemented!(
+        "RFC0003.6 — a valid OTLP/JSON request (whitespace + field-ordering \
+         variation; hex trace/span IDs, base64 bytes, integer-valued enums, \
+         unknown fields ignored) decodes to the same in-memory AnyValue tree the \
+         same logical record produces over gRPC + protobuf. Equivalence asserted \
+         at the AnyValue level (canonicalisation is the storage layer's, per §6.4)."
+    );
+}
diff --git a/crates/ourios-ingester/tests/rfc0003_7_body_structured_verbatim.rs b/crates/ourios-ingester/tests/rfc0003_7_body_structured_verbatim.rs
new file mode 100644
index 000000000..b276bffd2
--- /dev/null
+++ b/crates/ourios-ingester/tests/rfc0003_7_body_structured_verbatim.rs
@@ -0,0 +1,17 @@
+//! RFC0003.7 — `Body::Structured` carries the decoded `AnyValue` verbatim.
+//!
+//! Red gate (`specified → red`): `#[ignore]`'d until the receiver
+//! lands.
+
+/// Scenario RFC0003.7 — `Body::Structured` carries the decoded `AnyValue` verbatim.
+/// See `docs/rfcs/0003-otlp-receiver.md` §5.
+#[ignore = "RFC 0003 red gate — implementation pending (RFC0003.7)"]
+#[test]
+fn rfc0003_7_structured_body_reaches_miner_as_verbatim_anyvalue() {
+    unimplemented!(
+        "RFC0003.7 — a structured body reaches the miner as \
+         Body::Structured(AnyValue) structurally equal to the wire AnyValue (no \
+         canonicalisation, no reshape, no dropped fields), and the same equality \
+         holds across all three transports."
+    );
+}
diff --git a/crates/ourios-ingester/tests/rfc0003_8_body_string_lraw.rs b/crates/ourios-ingester/tests/rfc0003_8_body_string_lraw.rs
new file mode 100644
index 000000000..f8b42761e
--- /dev/null
+++ b/crates/ourios-ingester/tests/rfc0003_8_body_string_lraw.rs
@@ -0,0 +1,17 @@
+//! RFC0003.8 — `Body::String` reaches the miner as the unwrapped `L_raw`.
+//!
+//! Red gate (`specified → red`): `#[ignore]`'d until the receiver
+//! lands.
+
+/// Scenario RFC0003.8 — `Body::String` reaches the miner as the unwrapped `L_raw`.
+/// See `docs/rfcs/0003-otlp-receiver.md` §5.
+#[ignore = "RFC 0003 red gate — implementation pending (RFC0003.8)"]
+#[test]
+fn rfc0003_8_string_body_reaches_miner_unwrapped() {
+    unimplemented!(
+        "RFC0003.8 — a string body becomes OtlpLogRecord.body = \
+         Some(Body::String(s)) where s is the original UTF-8 string (no wrapping, \
+         quoting, or escaping); the value handed to MinerCluster::ingest equals s \
+         byte-for-byte (instrumented MinerCluster stub records the body argument)."
+    );
+}
diff --git a/crates/ourios-ingester/tests/rfc0003_9_edge_otlp_fields.rs b/crates/ourios-ingester/tests/rfc0003_9_edge_otlp_fields.rs
new file mode 100644
index 000000000..df7355294
--- /dev/null
+++ b/crates/ourios-ingester/tests/rfc0003_9_edge_otlp_fields.rs
@@ -0,0 +1,18 @@
+//! RFC0003.9 — Edge OTLP fields pass through unchanged.
+//!
+//! Red gate (`specified → red`): `#[ignore]`'d until the receiver
+//! lands.
+
+/// Scenario RFC0003.9 — Edge OTLP fields pass through unchanged.
+/// See `docs/rfcs/0003-otlp-receiver.md` §5.
+#[ignore = "RFC 0003 red gate — implementation pending (RFC0003.9)"]
+#[test]
+fn rfc0003_9_edge_otlp_fields_are_not_coalesced() {
+    unimplemented!(
+        "RFC0003.9 — severity_number = 0 (UNSPECIFIED) is kept as 0, scope_name = \
+         None, and wire observed_time_unix_nano = 0 maps to None (the Option<u64> \
+         conversion this scenario owns). The record is accepted by \
+         MinerCluster::ingest without rejection, coalescing, substitution, or \
+         downcast to a default."
+    );
+}