diff --git a/bitcoin-core-sv2/Cargo.toml b/bitcoin-core-sv2/Cargo.toml
index 6c6897588..8238767f0 100644
--- a/bitcoin-core-sv2/Cargo.toml
+++ b/bitcoin-core-sv2/Cargo.toml
@@ -27,4 +27,4 @@ bitcoin_capnp_types_v31 = { package = "bitcoin-capnp-types", version = "0.2.1" }
 # fetching from github enables synchronizing development workflows across sv2-apps and stratum repos
 # it MUST be changed before bitcoin-core-sv2 is published to crates.io
 # with the proper version of stratum-core being fetched from crates.io as well
-stratum-core = { git = "https://github.com/stratum-mining/stratum", branch = "main" }
+stratum-core = { git = "https://github.com/marafoundation/stratum", branch = "feat/configurable-max-past-jobs" }
diff --git a/integration-tests/Cargo.lock b/integration-tests/Cargo.lock
index 0a9530e38..f7c92e0b4 100644
--- a/integration-tests/Cargo.lock
+++ b/integration-tests/Cargo.lock
@@ -1025,7 +1025,7 @@ checksum = "32637268377fc7b10a8c6d51de3e7fba1ce5dd371a96e342b34e6078db558e7f"
 [[package]]
 name = "binary_sv2"
 version = "7.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "buffer_sv2",
  "derive_codec_sv2",
@@ -1210,7 +1210,7 @@ dependencies = [
 [[package]]
 name = "buffer_sv2"
 version = "3.0.1"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "aes-gcm",
 ]
@@ -1347,7 +1347,7 @@ dependencies = [
 [[package]]
 name = "channels_sv2"
 version = "8.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "bitcoin",
@@ -1460,7 +1460,7 @@ dependencies = [
 [[package]]
 name = "codec_sv2"
 version = "7.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "buffer_sv2",
@@ -1489,7 +1489,7 @@ dependencies = [
 [[package]]
 name = "common_messages_sv2"
 version = "9.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
 ]
@@ -1790,7 +1790,7 @@ dependencies = [
 [[package]]
 name = "derive_codec_sv2"
 version = "2.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 
 [[package]]
 name = "digest"
@@ -1969,7 +1969,7 @@ dependencies = [
 [[package]]
 name = "extensions_sv2"
 version = "0.3.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
 ]
@@ -2042,7 +2042,7 @@ dependencies = [
 [[package]]
 name = "framing_sv2"
 version = "8.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "buffer_sv2",
@@ -2263,7 +2263,7 @@ dependencies = [
 [[package]]
 name = "handlers_sv2"
 version = "0.6.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "common_messages_sv2",
@@ -2826,7 +2826,7 @@ dependencies = [
 [[package]]
 name = "job_declaration_sv2"
 version = "10.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
 ]
@@ -3071,7 +3071,7 @@ checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
 [[package]]
 name = "mining_sv2"
 version = "12.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
 ]
@@ -3124,7 +3124,7 @@ dependencies = [
 [[package]]
 name = "noise_sv2"
 version = "2.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "chacha20poly1305",
  "rand 0.8.6",
@@ -3286,7 +3286,7 @@ dependencies = [
 [[package]]
 name = "parsers_sv2"
 version = "0.6.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "common_messages_sv2",
@@ -4399,7 +4399,7 @@ dependencies = [
 [[package]]
 name = "stratum-core"
 version = "0.6.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "bitcoin",
@@ -4422,7 +4422,7 @@ dependencies = [
 [[package]]
 name = "stratum_translation"
 version = "0.5.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "bitcoin",
@@ -4469,7 +4469,7 @@ checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292"
 [[package]]
 name = "sv1_api"
 version = "6.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "bitcoin",
@@ -4537,7 +4537,7 @@ dependencies = [
 [[package]]
 name = "template_distribution_sv2"
 version = "7.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
 ]
diff --git a/miner-apps/Cargo.lock b/miner-apps/Cargo.lock
index 165c5f8d0..e7c8af036 100644
--- a/miner-apps/Cargo.lock
+++ b/miner-apps/Cargo.lock
@@ -839,7 +839,7 @@ checksum = "32637268377fc7b10a8c6d51de3e7fba1ce5dd371a96e342b34e6078db558e7f"
 [[package]]
 name = "binary_sv2"
 version = "7.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "buffer_sv2",
  "derive_codec_sv2",
@@ -1005,7 +1005,7 @@ dependencies = [
 [[package]]
 name = "buffer_sv2"
 version = "3.0.1"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "aes-gcm",
 ]
@@ -1136,7 +1136,7 @@ dependencies = [
 [[package]]
 name = "channels_sv2"
 version = "8.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "bitcoin",
@@ -1228,7 +1228,7 @@ dependencies = [
 [[package]]
 name = "codec_sv2"
 version = "7.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "buffer_sv2",
@@ -1266,7 +1266,7 @@ dependencies = [
 [[package]]
 name = "common_messages_sv2"
 version = "9.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
 ]
@@ -1476,7 +1476,7 @@ dependencies = [
 [[package]]
 name = "derive_codec_sv2"
 version = "2.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 
 [[package]]
 name = "digest"
@@ -1644,7 +1644,7 @@ checksum = "0206175f82b8d6bf6652ff7d71a1e27fd2e4efde587fd368662814d6ec1d9ce0"
 [[package]]
 name = "extensions_sv2"
 version = "0.3.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
 ]
@@ -1712,7 +1712,7 @@ dependencies = [
 [[package]]
 name = "framing_sv2"
 version = "8.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "buffer_sv2",
@@ -1883,7 +1883,7 @@ dependencies = [
 [[package]]
 name = "handlers_sv2"
 version = "0.6.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "common_messages_sv2",
@@ -2405,7 +2405,7 @@ dependencies = [
 [[package]]
 name = "job_declaration_sv2"
 version = "10.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
 ]
@@ -2597,7 +2597,7 @@ checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
 [[package]]
 name = "mining_sv2"
 version = "12.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
 ]
@@ -2637,7 +2637,7 @@ dependencies = [
 [[package]]
 name = "noise_sv2"
 version = "2.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "chacha20poly1305",
  "rand 0.8.5",
@@ -2767,7 +2767,7 @@ dependencies = [
 [[package]]
 name = "parsers_sv2"
 version = "0.6.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "common_messages_sv2",
@@ -3771,7 +3771,7 @@ dependencies = [
 [[package]]
 name = "stratum-core"
 version = "0.6.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "bitcoin",
@@ -3794,7 +3794,7 @@ dependencies = [
 [[package]]
 name = "stratum_translation"
 version = "0.5.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "bitcoin",
@@ -3841,7 +3841,7 @@ checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292"
 [[package]]
 name = "sv1_api"
 version = "6.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "bitcoin",
@@ -3897,7 +3897,7 @@ checksum = "adb6935a6f5c20170eeceb1a3835a49e12e19d792f6dd344ccc76a985ca5a6ca"
 [[package]]
 name = "template_distribution_sv2"
 version = "7.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
 ]
diff --git a/miner-apps/jd-client/config-examples/mainnet/jdc-config-bitcoin-core-ipc-hosted-infra-example.toml b/miner-apps/jd-client/config-examples/mainnet/jdc-config-bitcoin-core-ipc-hosted-infra-example.toml
index 62cfed85b..61a4e015e 100644
--- a/miner-apps/jd-client/config-examples/mainnet/jdc-config-bitcoin-core-ipc-hosted-infra-example.toml
+++ b/miner-apps/jd-client/config-examples/mainnet/jdc-config-bitcoin-core-ipc-hosted-infra-example.toml
@@ -53,6 +53,12 @@ monitoring_address = "0.0.0.0:9091"
 monitoring_cache_refresh_secs = 15
 
 # LAN subnet containing ASIC miner web/API addresses (for example, 192.168.1.0/24).
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 [miner_telemetry]
 cidrs = ["192.168.1.0/24"]
 
diff --git a/miner-apps/jd-client/config-examples/mainnet/jdc-config-bitcoin-core-ipc-local-infra-example.toml b/miner-apps/jd-client/config-examples/mainnet/jdc-config-bitcoin-core-ipc-local-infra-example.toml
index b56b3a533..5c58bd5c5 100644
--- a/miner-apps/jd-client/config-examples/mainnet/jdc-config-bitcoin-core-ipc-local-infra-example.toml
+++ b/miner-apps/jd-client/config-examples/mainnet/jdc-config-bitcoin-core-ipc-local-infra-example.toml
@@ -53,6 +53,12 @@ monitoring_address = "0.0.0.0:9091"
 monitoring_cache_refresh_secs = 15
 
 # LAN subnet containing ASIC miner web/API addresses (for example, 192.168.1.0/24).
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 [miner_telemetry]
 cidrs = ["192.168.1.0/24"]
 
diff --git a/miner-apps/jd-client/config-examples/mainnet/jdc-config-hosted-infra-example.toml b/miner-apps/jd-client/config-examples/mainnet/jdc-config-hosted-infra-example.toml
index 9b3edffcb..2ade76210 100644
--- a/miner-apps/jd-client/config-examples/mainnet/jdc-config-hosted-infra-example.toml
+++ b/miner-apps/jd-client/config-examples/mainnet/jdc-config-hosted-infra-example.toml
@@ -53,6 +53,12 @@ monitoring_address = "0.0.0.0:9091"
 monitoring_cache_refresh_secs = 15
 
 # LAN subnet containing ASIC miner web/API addresses (for example, 192.168.1.0/24).
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 [miner_telemetry]
 cidrs = ["192.168.1.0/24"]
 
diff --git a/miner-apps/jd-client/config-examples/mainnet/jdc-config-local-infra-example.toml b/miner-apps/jd-client/config-examples/mainnet/jdc-config-local-infra-example.toml
index 3604a9354..7be8e9aa3 100644
--- a/miner-apps/jd-client/config-examples/mainnet/jdc-config-local-infra-example.toml
+++ b/miner-apps/jd-client/config-examples/mainnet/jdc-config-local-infra-example.toml
@@ -53,6 +53,12 @@ monitoring_address = "0.0.0.0:9091"
 monitoring_cache_refresh_secs = 15
 
 # LAN subnet containing ASIC miner web/API addresses (for example, 192.168.1.0/24).
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 [miner_telemetry]
 cidrs = ["192.168.1.0/24"]
 
diff --git a/miner-apps/jd-client/config-examples/mainnet/jdc-config-solo-mining-example.toml b/miner-apps/jd-client/config-examples/mainnet/jdc-config-solo-mining-example.toml
index bfd69bfe6..9b3d991fd 100644
--- a/miner-apps/jd-client/config-examples/mainnet/jdc-config-solo-mining-example.toml
+++ b/miner-apps/jd-client/config-examples/mainnet/jdc-config-solo-mining-example.toml
@@ -40,6 +40,12 @@ upstreams = []
 # Templates come directly from the Template Provider below.
 
 # LAN subnet containing ASIC miner web/API addresses (for example, 192.168.1.0/24).
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 [miner_telemetry]
 cidrs = ["192.168.1.0/24"]
 
diff --git a/miner-apps/jd-client/config-examples/signet/jdc-config-bitcoin-core-ipc-local-infra-example.toml b/miner-apps/jd-client/config-examples/signet/jdc-config-bitcoin-core-ipc-local-infra-example.toml
index b2960a391..ead13a683 100644
--- a/miner-apps/jd-client/config-examples/signet/jdc-config-bitcoin-core-ipc-local-infra-example.toml
+++ b/miner-apps/jd-client/config-examples/signet/jdc-config-bitcoin-core-ipc-local-infra-example.toml
@@ -53,6 +53,12 @@ monitoring_address = "0.0.0.0:9091"
 monitoring_cache_refresh_secs = 15
 
 # LAN subnet containing ASIC miner web/API addresses (for example, 192.168.1.0/24).
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 [miner_telemetry]
 cidrs = ["192.168.1.0/24"]
 
diff --git a/miner-apps/jd-client/config-examples/signet/jdc-config-local-infra-example.toml b/miner-apps/jd-client/config-examples/signet/jdc-config-local-infra-example.toml
index 922a3bc16..7f5221c3b 100644
--- a/miner-apps/jd-client/config-examples/signet/jdc-config-local-infra-example.toml
+++ b/miner-apps/jd-client/config-examples/signet/jdc-config-local-infra-example.toml
@@ -53,6 +53,12 @@ monitoring_address = "0.0.0.0:9091"
 monitoring_cache_refresh_secs = 15
 
 # LAN subnet containing ASIC miner web/API addresses (for example, 192.168.1.0/24).
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 [miner_telemetry]
 cidrs = ["192.168.1.0/24"]
 
diff --git a/miner-apps/jd-client/config-examples/testnet4/jdc-config-bitcoin-core-ipc-hosted-infra-example.toml b/miner-apps/jd-client/config-examples/testnet4/jdc-config-bitcoin-core-ipc-hosted-infra-example.toml
index fbd77c349..c275df3f3 100644
--- a/miner-apps/jd-client/config-examples/testnet4/jdc-config-bitcoin-core-ipc-hosted-infra-example.toml
+++ b/miner-apps/jd-client/config-examples/testnet4/jdc-config-bitcoin-core-ipc-hosted-infra-example.toml
@@ -53,6 +53,12 @@ monitoring_address = "0.0.0.0:9091"
 monitoring_cache_refresh_secs = 15
 
 # LAN subnet containing ASIC miner web/API addresses (for example, 192.168.1.0/24).
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 [miner_telemetry]
 cidrs = ["192.168.1.0/24"]
 
diff --git a/miner-apps/jd-client/config-examples/testnet4/jdc-config-bitcoin-core-ipc-local-infra-example.toml b/miner-apps/jd-client/config-examples/testnet4/jdc-config-bitcoin-core-ipc-local-infra-example.toml
index c443b8dc6..a1e9f06dc 100644
--- a/miner-apps/jd-client/config-examples/testnet4/jdc-config-bitcoin-core-ipc-local-infra-example.toml
+++ b/miner-apps/jd-client/config-examples/testnet4/jdc-config-bitcoin-core-ipc-local-infra-example.toml
@@ -53,6 +53,12 @@ monitoring_address = "0.0.0.0:9091"
 monitoring_cache_refresh_secs = 15
 
 # LAN subnet containing ASIC miner web/API addresses (for example, 192.168.1.0/24).
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 [miner_telemetry]
 cidrs = ["192.168.1.0/24"]
 
diff --git a/miner-apps/jd-client/config-examples/testnet4/jdc-config-hosted-infra-example.toml b/miner-apps/jd-client/config-examples/testnet4/jdc-config-hosted-infra-example.toml
index 4d282f9a5..d6455b3e1 100644
--- a/miner-apps/jd-client/config-examples/testnet4/jdc-config-hosted-infra-example.toml
+++ b/miner-apps/jd-client/config-examples/testnet4/jdc-config-hosted-infra-example.toml
@@ -53,6 +53,12 @@ monitoring_address = "0.0.0.0:9091"
 monitoring_cache_refresh_secs = 15
 
 # LAN subnet containing ASIC miner web/API addresses (for example, 192.168.1.0/24).
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 [miner_telemetry]
 cidrs = ["192.168.1.0/24"]
 
diff --git a/miner-apps/jd-client/config-examples/testnet4/jdc-config-local-infra-example.toml b/miner-apps/jd-client/config-examples/testnet4/jdc-config-local-infra-example.toml
index 1d0823b20..f149545ae 100644
--- a/miner-apps/jd-client/config-examples/testnet4/jdc-config-local-infra-example.toml
+++ b/miner-apps/jd-client/config-examples/testnet4/jdc-config-local-infra-example.toml
@@ -53,6 +53,12 @@ monitoring_address = "0.0.0.0:9091"
 monitoring_cache_refresh_secs = 15
 
 # LAN subnet containing ASIC miner web/API addresses (for example, 192.168.1.0/24).
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 [miner_telemetry]
 cidrs = ["192.168.1.0/24"]
 
diff --git a/miner-apps/jd-client/src/lib/channel_manager/downstream_message_handler.rs b/miner-apps/jd-client/src/lib/channel_manager/downstream_message_handler.rs
index 1c1a0da92..e109fcae7 100644
--- a/miner-apps/jd-client/src/lib/channel_manager/downstream_message_handler.rs
+++ b/miner-apps/jd-client/src/lib/channel_manager/downstream_message_handler.rs
@@ -323,6 +323,7 @@ impl HandleMiningMessagesFromClientOwnedAsync for ChannelManager {
                 self.shares_per_minute,
                 pool_tag_string,
                 self.miner_tag_string.clone(),
+                self.max_past_jobs,
             ) {
                 Ok(standard_channel) => Some(standard_channel),
                 Err(e) => {
@@ -564,6 +565,7 @@ impl HandleMiningMessagesFromClientOwnedAsync for ChannelManager {
                         self.shares_per_minute,
                         pool_tag_string,
                         self.miner_tag_string.clone(),
+                        self.max_past_jobs,
                     ) {
                         Ok(channel) => Some(channel),
                         Err(e) => {
diff --git a/miner-apps/jd-client/src/lib/channel_manager/mod.rs b/miner-apps/jd-client/src/lib/channel_manager/mod.rs
index 01185ec83..365ce7132 100644
--- a/miner-apps/jd-client/src/lib/channel_manager/mod.rs
+++ b/miner-apps/jd-client/src/lib/channel_manager/mod.rs
@@ -301,6 +301,8 @@ pub struct ChannelManager {
     miner_tag_string: String,
     share_batch_size: SharesBatchSize,
     shares_per_minute: SharesPerMinute,
+    /// Past jobs retained per channel; `None` uses the `channels_sv2` default.
+    max_past_jobs: Option<usize>,
     user_identity: Arc<OnceLock<String>>,
     reserved_downstream_rollable_extranonce_size: u8,
     /// This represent the current state of Upstream channel
@@ -398,6 +400,14 @@ impl ChannelManager {
             ExtranonceAllocator::new(Vec::new(), SOLO_FULL_EXTRANONCE_SIZE, JDC_MAX_CHANNELS)
                 .map_err(JDCError::<error::ChannelManager>::shutdown)?;
 
+        // Record the cap actually in force. When unset it comes from the `channels_sv2`
+        // default, so it appears nowhere in this application's own config and is
+        // otherwise not recoverable from a running instance.
+        match config.max_past_jobs() {
+            Some(n) if n > 0 => info!(max_past_jobs = n, "past-jobs retention cap configured"),
+            _ => info!("past-jobs retention cap: using channels_sv2 default"),
+        }
+
         let channel_manager_io = ChannelManagerIo {
             upstream_sender,
             upstream_receiver,
@@ -435,6 +445,7 @@ impl ChannelManager {
             cached_shares: SharedMap::new(),
             share_batch_size: config.share_batch_size(),
             shares_per_minute: config.shares_per_minute(),
+            max_past_jobs: config.max_past_jobs(),
             miner_tag_string: config.jdc_signature().to_string(),
             user_identity: Arc::new(OnceLock::new()),
             reserved_downstream_rollable_extranonce_size: config
diff --git a/miner-apps/jd-client/src/lib/channel_manager/upstream_message_handler.rs b/miner-apps/jd-client/src/lib/channel_manager/upstream_message_handler.rs
index efd8b4ec3..65ec094e0 100644
--- a/miner-apps/jd-client/src/lib/channel_manager/upstream_message_handler.rs
+++ b/miner-apps/jd-client/src/lib/channel_manager/upstream_message_handler.rs
@@ -187,6 +187,7 @@ impl HandleMiningMessagesFromServerOwnedAsync for ChannelManager {
             hashrate,
             true,
             msg.extranonce_size,
+            self.max_past_jobs,
         );
 
         if let Some(prevhash) = self.last_new_prev_hash.get().map_err(JDCError::shutdown)? {
diff --git a/miner-apps/jd-client/src/lib/config.rs b/miner-apps/jd-client/src/lib/config.rs
index 906677f54..294e1829d 100644
--- a/miner-apps/jd-client/src/lib/config.rs
+++ b/miner-apps/jd-client/src/lib/config.rs
@@ -43,6 +43,13 @@ pub struct JobDeclaratorClientConfig {
     shares_per_minute: SharesPerMinute,
     /// share batch size
     share_batch_size: SharesBatchSize,
+    /// Past jobs retained per channel for late-share validation.
+    ///
+    /// `None` and `Some(0)` both select the `channels_sv2` default. This is a retention
+    /// window — `cap / template rate` — so the right value depends on this deployment's
+    /// template cadence and its downstreams' submission latency.
+    #[serde(default)]
+    max_past_jobs: Option<usize>,
     /// JDC mode: FullTemplate, CoinbaseOnly, or SoloMining
     #[serde(deserialize_with = "deserialize_jdc_mode", default)]
     pub mode: ConfigJDCMode,
@@ -104,6 +111,9 @@ impl JobDeclaratorClientConfig {
     ) -> Self {
         Self {
             listening_address,
+            // Programmatic construction takes the library default; use
+            // `set_max_past_jobs` to override, as the file-based path does via serde.
+            max_past_jobs: None,
             max_supported_version: protocol_config.max_supported_version,
             min_supported_version: protocol_config.min_supported_version,
             authority_public_key: pool_config.authority_public_key,
@@ -214,6 +224,17 @@ impl JobDeclaratorClientConfig {
         self.share_batch_size
     }
 
+    /// Past jobs retained per channel, or `None` to use the `channels_sv2` default.
+    pub fn max_past_jobs(&self) -> Option<usize> {
+        self.max_past_jobs
+    }
+
+    /// Overrides the retained past-jobs cap. For tests and for deployments that vary it
+    /// between otherwise-identical instances.
+    pub fn set_max_past_jobs(&mut self, max_past_jobs: Option<usize>) {
+        self.max_past_jobs = max_past_jobs;
+    }
+
     /// Returns the supported extensions.
     pub fn supported_extensions(&self) -> &[u16] {
         &self.supported_extensions
@@ -403,3 +424,40 @@ mod tests {
         assert_eq!(upstream.user_identity, "");
     }
 }
+
+#[cfg(test)]
+mod max_past_jobs_tests {
+    /// Every shipped example must document the setting, commented out.
+    ///
+    /// Commented out matters: it keeps the library default in force for existing
+    /// deployments. Absent-means-default is also why `Some(0)` is treated as "no
+    /// opinion" rather than a literal zero — a zero cap would evict the job that just
+    /// retired and reject the most common late share as `invalid-job-id`.
+    ///
+    /// The test walks the directory rather than naming files, and asserts it found
+    /// some: an earlier version named one file, guessed the name wrong, and passed by
+    /// silently doing nothing.
+    #[test]
+    fn every_example_documents_the_cap_commented_out() {
+        let dir = std::path::Path::new(env!("CARGO_MANIFEST_DIR")).join("config-examples");
+        let mut checked = 0;
+        let mut stack = vec![dir];
+        while let Some(d) = stack.pop() {
+            for entry in std::fs::read_dir(&d).expect("read config-examples") {
+                let path = entry.expect("dir entry").path();
+                if path.is_dir() {
+                    stack.push(path);
+                } else if path.extension().is_some_and(|e| e == "toml") {
+                    let text = std::fs::read_to_string(&path).expect("read example");
+                    assert!(
+                        text.contains("# max_past_jobs"),
+                        "{} does not document max_past_jobs (commented out)",
+                        path.display()
+                    );
+                    checked += 1;
+                }
+            }
+        }
+        assert!(checked > 0, "no examples found — the test would be vacuous");
+    }
+}
diff --git a/miner-apps/translator/config-examples/mainnet/tproxy-config-hosted-pool-example.toml b/miner-apps/translator/config-examples/mainnet/tproxy-config-hosted-pool-example.toml
index f34f8dd1c..f7eecaa00 100644
--- a/miner-apps/translator/config-examples/mainnet/tproxy-config-hosted-pool-example.toml
+++ b/miner-apps/translator/config-examples/mainnet/tproxy-config-hosted-pool-example.toml
@@ -39,6 +39,12 @@ monitoring_address = "0.0.0.0:9092"
 monitoring_cache_refresh_secs = 15
 
 # LAN subnet containing ASIC miner web/API addresses (for example, 192.168.1.0/24).
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 [miner_telemetry]
 cidrs = ["192.168.1.0/24"]
 
diff --git a/miner-apps/translator/config-examples/mainnet/tproxy-config-local-jdc-example.toml b/miner-apps/translator/config-examples/mainnet/tproxy-config-local-jdc-example.toml
index 058107b98..45cc9a847 100644
--- a/miner-apps/translator/config-examples/mainnet/tproxy-config-local-jdc-example.toml
+++ b/miner-apps/translator/config-examples/mainnet/tproxy-config-local-jdc-example.toml
@@ -39,6 +39,12 @@ monitoring_address = "0.0.0.0:9092"
 monitoring_cache_refresh_secs = 15
 
 # LAN subnet containing ASIC miner web/API addresses (for example, 192.168.1.0/24).
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 [miner_telemetry]
 cidrs = ["192.168.1.0/24"]
 
diff --git a/miner-apps/translator/config-examples/mainnet/tproxy-config-local-pool-example.toml b/miner-apps/translator/config-examples/mainnet/tproxy-config-local-pool-example.toml
index e029d5eb9..f2e6fb125 100644
--- a/miner-apps/translator/config-examples/mainnet/tproxy-config-local-pool-example.toml
+++ b/miner-apps/translator/config-examples/mainnet/tproxy-config-local-pool-example.toml
@@ -39,6 +39,12 @@ monitoring_address = "0.0.0.0:9092"
 monitoring_cache_refresh_secs = 15
 
 # LAN subnet containing ASIC miner web/API addresses (for example, 192.168.1.0/24).
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 [miner_telemetry]
 cidrs = ["192.168.1.0/24"]
 
diff --git a/miner-apps/translator/config-examples/signet/tproxy-config-local-jdc-example.toml b/miner-apps/translator/config-examples/signet/tproxy-config-local-jdc-example.toml
index 058107b98..45cc9a847 100644
--- a/miner-apps/translator/config-examples/signet/tproxy-config-local-jdc-example.toml
+++ b/miner-apps/translator/config-examples/signet/tproxy-config-local-jdc-example.toml
@@ -39,6 +39,12 @@ monitoring_address = "0.0.0.0:9092"
 monitoring_cache_refresh_secs = 15
 
 # LAN subnet containing ASIC miner web/API addresses (for example, 192.168.1.0/24).
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 [miner_telemetry]
 cidrs = ["192.168.1.0/24"]
 
diff --git a/miner-apps/translator/config-examples/signet/tproxy-config-local-pool-example.toml b/miner-apps/translator/config-examples/signet/tproxy-config-local-pool-example.toml
index 1831c788c..af95c405c 100644
--- a/miner-apps/translator/config-examples/signet/tproxy-config-local-pool-example.toml
+++ b/miner-apps/translator/config-examples/signet/tproxy-config-local-pool-example.toml
@@ -39,6 +39,12 @@ monitoring_address = "0.0.0.0:9092"
 monitoring_cache_refresh_secs = 15
 
 # LAN subnet containing ASIC miner web/API addresses (for example, 192.168.1.0/24).
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 [miner_telemetry]
 cidrs = ["192.168.1.0/24"]
 
diff --git a/miner-apps/translator/config-examples/testnet4/tproxy-config-hosted-pool-example.toml b/miner-apps/translator/config-examples/testnet4/tproxy-config-hosted-pool-example.toml
index 77b178977..2cd775f58 100644
--- a/miner-apps/translator/config-examples/testnet4/tproxy-config-hosted-pool-example.toml
+++ b/miner-apps/translator/config-examples/testnet4/tproxy-config-hosted-pool-example.toml
@@ -39,6 +39,12 @@ monitoring_address = "0.0.0.0:9092"
 monitoring_cache_refresh_secs = 15
 
 # LAN subnet containing ASIC miner web/API addresses (for example, 192.168.1.0/24).
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 [miner_telemetry]
 cidrs = ["192.168.1.0/24"]
 
diff --git a/miner-apps/translator/config-examples/testnet4/tproxy-config-local-jdc-example.toml b/miner-apps/translator/config-examples/testnet4/tproxy-config-local-jdc-example.toml
index 058107b98..45cc9a847 100644
--- a/miner-apps/translator/config-examples/testnet4/tproxy-config-local-jdc-example.toml
+++ b/miner-apps/translator/config-examples/testnet4/tproxy-config-local-jdc-example.toml
@@ -39,6 +39,12 @@ monitoring_address = "0.0.0.0:9092"
 monitoring_cache_refresh_secs = 15
 
 # LAN subnet containing ASIC miner web/API addresses (for example, 192.168.1.0/24).
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 [miner_telemetry]
 cidrs = ["192.168.1.0/24"]
 
diff --git a/miner-apps/translator/config-examples/testnet4/tproxy-config-local-pool-example.toml b/miner-apps/translator/config-examples/testnet4/tproxy-config-local-pool-example.toml
index b74a22036..4e9fc8d7e 100644
--- a/miner-apps/translator/config-examples/testnet4/tproxy-config-local-pool-example.toml
+++ b/miner-apps/translator/config-examples/testnet4/tproxy-config-local-pool-example.toml
@@ -39,6 +39,12 @@ monitoring_address = "0.0.0.0:9092"
 monitoring_cache_refresh_secs = 15
 
 # LAN subnet containing ASIC miner web/API addresses (for example, 192.168.1.0/24).
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 [miner_telemetry]
 cidrs = ["192.168.1.0/24"]
 
diff --git a/miner-apps/translator/src/lib/config.rs b/miner-apps/translator/src/lib/config.rs
index 6d225a31f..2be2535ab 100644
--- a/miner-apps/translator/src/lib/config.rs
+++ b/miner-apps/translator/src/lib/config.rs
@@ -46,6 +46,13 @@ pub struct TranslatorConfig {
     /// If true, all miners share one channel. If false, each miner gets its own channel.
     pub aggregate_channels: bool,
     /// Protocol extensions that the translator supports (will request if supported by server).
+    /// Past jobs retained per channel for late-share validation.
+    ///
+    /// `None` and `Some(0)` both select the `channels_sv2` default. This is a retention
+    /// window — `cap / template rate` — so the right value depends on this deployment's
+    /// template cadence and its SV1 miners' submission latency.
+    #[serde(default)]
+    pub max_past_jobs: Option<usize>,
     #[serde(default)]
     pub supported_extensions: Vec<u16>,
     /// Protocol extensions that the translator requires (server must support these).
@@ -124,6 +131,9 @@ impl TranslatorConfig {
     ) -> Self {
         Self {
             upstreams,
+            // Programmatic construction takes the library default; the file-based path
+            // sets it via serde, and callers can assign the field directly.
+            max_past_jobs: None,
             downstream_address,
             downstream_port,
             max_supported_version,
@@ -574,3 +584,40 @@ mod tests {
         assert_eq!(config.upstreams[1].user_identity, "bc1qbackup.worker");
     }
 }
+
+#[cfg(test)]
+mod max_past_jobs_tests {
+    /// Every shipped example must document the setting, commented out.
+    ///
+    /// Commented out matters: it keeps the library default in force for existing
+    /// deployments. Absent-means-default is also why `Some(0)` is treated as "no
+    /// opinion" rather than a literal zero — a zero cap would evict the job that just
+    /// retired and reject the most common late share as `invalid-job-id`.
+    ///
+    /// The test walks the directory rather than naming files, and asserts it found
+    /// some: an earlier version named one file, guessed the name wrong, and passed by
+    /// silently doing nothing.
+    #[test]
+    fn every_example_documents_the_cap_commented_out() {
+        let dir = std::path::Path::new(env!("CARGO_MANIFEST_DIR")).join("config-examples");
+        let mut checked = 0;
+        let mut stack = vec![dir];
+        while let Some(d) = stack.pop() {
+            for entry in std::fs::read_dir(&d).expect("read config-examples") {
+                let path = entry.expect("dir entry").path();
+                if path.is_dir() {
+                    stack.push(path);
+                } else if path.extension().is_some_and(|e| e == "toml") {
+                    let text = std::fs::read_to_string(&path).expect("read example");
+                    assert!(
+                        text.contains("# max_past_jobs"),
+                        "{} does not document max_past_jobs (commented out)",
+                        path.display()
+                    );
+                    checked += 1;
+                }
+            }
+        }
+        assert!(checked > 0, "no examples found — the test would be vacuous");
+    }
+}
diff --git a/miner-apps/translator/src/lib/monitoring.rs b/miner-apps/translator/src/lib/monitoring.rs
index 42f65ae03..3e0cfd7bc 100644
--- a/miner-apps/translator/src/lib/monitoring.rs
+++ b/miner-apps/translator/src/lib/monitoring.rs
@@ -132,6 +132,7 @@ mod tests {
             vec![],
             vec![],
             TproxyMode::Aggregated,
+            None,
             true,
         )
     }
@@ -146,6 +147,7 @@ mod tests {
             1.0,
             true,
             4,
+            None,
         )
     }
 
diff --git a/miner-apps/translator/src/lib/sv2/channel_manager/mining_message_handler.rs b/miner-apps/translator/src/lib/sv2/channel_manager/mining_message_handler.rs
index b5efdd830..f94f8e44a 100644
--- a/miner-apps/translator/src/lib/sv2/channel_manager/mining_message_handler.rs
+++ b/miner-apps/translator/src/lib/sv2/channel_manager/mining_message_handler.rs
@@ -179,6 +179,7 @@ impl HandleMiningMessagesFromServerOwnedAsync for ChannelManager {
                     nominal_hashrate,
                     version_rolling,
                     m.extranonce_size,
+                    self.max_past_jobs,
                 );
                 self.extended_channels
                     .insert(AGGREGATED_CHANNEL_ID, upstream_channel);
@@ -197,6 +198,7 @@ impl HandleMiningMessagesFromServerOwnedAsync for ChannelManager {
                     nominal_hashrate,
                     true,
                     downstream_extranonce_len as u16,
+                    self.max_past_jobs,
                 );
                 self.extended_channels
                     .insert(1, new_downstream_extended_channel);
@@ -329,6 +331,7 @@ impl HandleMiningMessagesFromServerOwnedAsync for ChannelManager {
                     nominal_hashrate,
                     version_rolling,
                     downstream_extranonce_len as u16,
+                    self.max_past_jobs,
                 );
                 self.extended_channels
                     .insert(m.channel_id, new_downstream_extended_channel);
diff --git a/miner-apps/translator/src/lib/sv2/channel_manager/mod.rs b/miner-apps/translator/src/lib/sv2/channel_manager/mod.rs
index b4b756c00..c1b32668b 100644
--- a/miner-apps/translator/src/lib/sv2/channel_manager/mod.rs
+++ b/miner-apps/translator/src/lib/sv2/channel_manager/mod.rs
@@ -136,6 +136,8 @@ pub struct ChannelManager {
     pub supported_extensions: Vec<u16>,
     /// Extensions that the translator requires (must be supported by server)
     pub required_extensions: Vec<u16>,
+    /// Past jobs retained per channel; `None` uses the `channels_sv2` default.
+    pub max_past_jobs: Option<usize>,
     /// Store pending channel info by downstream_id: (user_identity, hashrate,
     /// downstream_extranonce_len)
     ///
@@ -305,8 +307,17 @@ impl ChannelManager {
         supported_extensions: Vec<u16>,
         required_extensions: Vec<u16>,
         tproxy_mode: TproxyMode,
+        max_past_jobs: Option<usize>,
         #[cfg(feature = "monitoring")] report_hashrate: bool,
     ) -> Self {
+        // Record the cap actually in force. When unset it comes from the `channels_sv2`
+        // default, so it appears nowhere in this application's own config and is
+        // otherwise not recoverable from a running instance.
+        match max_past_jobs {
+            Some(n) if n > 0 => info!(max_past_jobs = n, "past-jobs retention cap configured"),
+            _ => info!("past-jobs retention cap: using channels_sv2 default"),
+        }
+
         let channel_manager_io = ChannelManagerIo::new(
             upstream_sender,
             upstream_receiver,
@@ -318,6 +329,7 @@ impl ChannelManager {
             channel_manager_io,
             supported_extensions,
             required_extensions,
+            max_past_jobs,
             pending_downstream_channels: SharedMap::new(),
             extended_channels: SharedMap::new(),
             group_channels: SharedMap::new(),
@@ -948,6 +960,7 @@ impl ChannelManager {
                     hashrate,
                     true,
                     min_extranonce_size as u16,
+                    self.max_past_jobs,
                 );
                 self.extended_channels
                     .insert(next_channel_id, new_downstream_extended_channel);
@@ -1097,6 +1110,7 @@ mod tests {
             vec![],
             vec![],
             TproxyMode::from(true),
+            None,
             #[cfg(feature = "monitoring")]
             true,
         )
@@ -1116,6 +1130,7 @@ mod tests {
             vec![],
             vec![],
             TproxyMode::Aggregated,
+            None,
             #[cfg(feature = "monitoring")]
             true,
         );
@@ -1130,6 +1145,7 @@ mod tests {
                 1.0,
                 true,
                 8,
+                None,
             ),
         );
         manager
@@ -1254,6 +1270,7 @@ mod tests {
             vec![],
             vec![],
             TproxyMode::Aggregated,
+            None,
             #[cfg(feature = "monitoring")]
             true,
         ));
@@ -1344,6 +1361,7 @@ mod tests {
                 1.0,
                 true,
                 6,
+                None,
             ),
         );
 
diff --git a/miner-apps/translator/src/lib/translator_runtime.rs b/miner-apps/translator/src/lib/translator_runtime.rs
index c2ba9a83d..5c3e6217f 100644
--- a/miner-apps/translator/src/lib/translator_runtime.rs
+++ b/miner-apps/translator/src/lib/translator_runtime.rs
@@ -256,6 +256,7 @@ impl TranslatorRuntime<IoReady> {
             self.translator.config.supported_extensions.clone(),
             self.translator.config.required_extensions.clone(),
             self.tproxy_mode,
+            self.translator.config.max_past_jobs,
             #[cfg(feature = "monitoring")]
             self.translator
                 .config
diff --git a/pool-apps/Cargo.lock b/pool-apps/Cargo.lock
index 1fea6b9c0..cfc1f814b 100644
--- a/pool-apps/Cargo.lock
+++ b/pool-apps/Cargo.lock
@@ -273,7 +273,7 @@ checksum = "32637268377fc7b10a8c6d51de3e7fba1ce5dd371a96e342b34e6078db558e7f"
 [[package]]
 name = "binary_sv2"
 version = "7.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "buffer_sv2",
  "derive_codec_sv2",
@@ -430,7 +430,7 @@ dependencies = [
 [[package]]
 name = "buffer_sv2"
 version = "3.0.1"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "aes-gcm",
 ]
@@ -542,7 +542,7 @@ dependencies = [
 [[package]]
 name = "channels_sv2"
 version = "8.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "bitcoin",
@@ -612,7 +612,7 @@ checksum = "c8d4a3bb8b1e0c1050499d1815f5ab16d04f0959b233085fb31653fbfc9d98f9"
 [[package]]
 name = "codec_sv2"
 version = "7.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "buffer_sv2",
@@ -640,7 +640,7 @@ dependencies = [
 [[package]]
 name = "common_messages_sv2"
 version = "9.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
 ]
@@ -808,7 +808,7 @@ dependencies = [
 [[package]]
 name = "derive_codec_sv2"
 version = "2.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 
 [[package]]
 name = "digest"
@@ -937,7 +937,7 @@ checksum = "0206175f82b8d6bf6652ff7d71a1e27fd2e4efde587fd368662814d6ec1d9ce0"
 [[package]]
 name = "extensions_sv2"
 version = "0.3.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
 ]
@@ -998,7 +998,7 @@ dependencies = [
 [[package]]
 name = "framing_sv2"
 version = "8.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "buffer_sv2",
@@ -1133,7 +1133,7 @@ dependencies = [
 [[package]]
 name = "handlers_sv2"
 version = "0.6.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "common_messages_sv2",
@@ -1533,7 +1533,7 @@ dependencies = [
 [[package]]
 name = "job_declaration_sv2"
 version = "10.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
 ]
@@ -1653,7 +1653,7 @@ checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
 [[package]]
 name = "mining_sv2"
 version = "12.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
 ]
@@ -1693,7 +1693,7 @@ dependencies = [
 [[package]]
 name = "noise_sv2"
 version = "2.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "chacha20poly1305",
  "rand",
@@ -1817,7 +1817,7 @@ dependencies = [
 [[package]]
 name = "parsers_sv2"
 version = "0.6.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "common_messages_sv2",
@@ -2476,7 +2476,7 @@ dependencies = [
 [[package]]
 name = "stratum-core"
 version = "0.6.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "bitcoin",
@@ -2543,7 +2543,7 @@ checksum = "55937e1799185b12863d447f42597ed69d9928686b8d88a1df17376a097d8369"
 [[package]]
 name = "template_distribution_sv2"
 version = "7.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
 ]
diff --git a/pool-apps/pool/config-examples/mainnet/pool-config-bitcoin-core-ipc-example.toml b/pool-apps/pool/config-examples/mainnet/pool-config-bitcoin-core-ipc-example.toml
index b4a220b9f..bb70aedf4 100644
--- a/pool-apps/pool/config-examples/mainnet/pool-config-bitcoin-core-ipc-example.toml
+++ b/pool-apps/pool/config-examples/mainnet/pool-config-bitcoin-core-ipc-example.toml
@@ -25,6 +25,12 @@ pool_signature = "Stratum V2 SRI Pool"
 shares_per_minute = 6.0
 # How many shares do we want to acknowledge in a batch
 share_batch_size = 10
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 
 # Monitoring HTTP server address for exposing channel data (optional)
 monitoring_address = "127.0.0.1:9090"
diff --git a/pool-apps/pool/config-examples/mainnet/pool-config-hosted-sv2-tp-example.toml b/pool-apps/pool/config-examples/mainnet/pool-config-hosted-sv2-tp-example.toml
index a38440a6c..7799c7177 100644
--- a/pool-apps/pool/config-examples/mainnet/pool-config-hosted-sv2-tp-example.toml
+++ b/pool-apps/pool/config-examples/mainnet/pool-config-hosted-sv2-tp-example.toml
@@ -25,6 +25,12 @@ pool_signature = "Stratum V2 SRI Pool"
 shares_per_minute = 6.0
 # How many shares do we want to acknowledge in a batch
 share_batch_size = 10
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 
 # Monitoring HTTP server address for exposing channel data (optional)
 monitoring_address = "127.0.0.1:9090"
diff --git a/pool-apps/pool/config-examples/mainnet/pool-config-local-sv2-tp-example.toml b/pool-apps/pool/config-examples/mainnet/pool-config-local-sv2-tp-example.toml
index 51fe325e3..f68d90afb 100644
--- a/pool-apps/pool/config-examples/mainnet/pool-config-local-sv2-tp-example.toml
+++ b/pool-apps/pool/config-examples/mainnet/pool-config-local-sv2-tp-example.toml
@@ -25,6 +25,12 @@ pool_signature = "Stratum V2 SRI Pool"
 shares_per_minute = 6.0
 # How many shares do we want to acknowledge in a batch
 share_batch_size = 10
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 
 # Monitoring HTTP server address for exposing channel data (optional)
 monitoring_address = "127.0.0.1:9090"
diff --git a/pool-apps/pool/config-examples/mainnet/pool-jds-config-bitcoin-core-ipc-example.toml b/pool-apps/pool/config-examples/mainnet/pool-jds-config-bitcoin-core-ipc-example.toml
index 88da338db..7abc5d555 100644
--- a/pool-apps/pool/config-examples/mainnet/pool-jds-config-bitcoin-core-ipc-example.toml
+++ b/pool-apps/pool/config-examples/mainnet/pool-jds-config-bitcoin-core-ipc-example.toml
@@ -25,6 +25,12 @@ pool_signature = "Stratum V2 SRI Pool"
 shares_per_minute = 6.0
 # How many shares do we want to acknowledge in a batch
 share_batch_size = 10
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 
 # Protocol Extensions Configuration
 # Extensions that the pool supports (will accept if requested by clients)
diff --git a/pool-apps/pool/config-examples/signet/pool-config-bitcoin-core-ipc-example.toml b/pool-apps/pool/config-examples/signet/pool-config-bitcoin-core-ipc-example.toml
index 17ac307f1..6ff332223 100644
--- a/pool-apps/pool/config-examples/signet/pool-config-bitcoin-core-ipc-example.toml
+++ b/pool-apps/pool/config-examples/signet/pool-config-bitcoin-core-ipc-example.toml
@@ -25,6 +25,12 @@ pool_signature = "Stratum V2 SRI Pool"
 shares_per_minute = 6.0
 # How many shares do we want to acknowledge in a batch
 share_batch_size = 10
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 
 monitoring_address = "127.0.0.1:9090"
 monitoring_cache_refresh_secs = 15
diff --git a/pool-apps/pool/config-examples/signet/pool-config-local-sv2-tp-example.toml b/pool-apps/pool/config-examples/signet/pool-config-local-sv2-tp-example.toml
index d48658c77..97dc00ced 100644
--- a/pool-apps/pool/config-examples/signet/pool-config-local-sv2-tp-example.toml
+++ b/pool-apps/pool/config-examples/signet/pool-config-local-sv2-tp-example.toml
@@ -25,6 +25,12 @@ pool_signature = "Stratum V2 SRI Pool"
 shares_per_minute = 6.0
 # How many shares do we want to acknowledge in a batch
 share_batch_size = 10
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 
 monitoring_address = "127.0.0.1:9090"
 monitoring_cache_refresh_secs = 15
diff --git a/pool-apps/pool/config-examples/signet/pool-jds-config-bitcoin-core-ipc-example.toml b/pool-apps/pool/config-examples/signet/pool-jds-config-bitcoin-core-ipc-example.toml
index 4b07bd9da..ae4539624 100644
--- a/pool-apps/pool/config-examples/signet/pool-jds-config-bitcoin-core-ipc-example.toml
+++ b/pool-apps/pool/config-examples/signet/pool-jds-config-bitcoin-core-ipc-example.toml
@@ -25,6 +25,12 @@ pool_signature = "Stratum V2 SRI Pool"
 shares_per_minute = 6.0
 # How many shares do we want to acknowledge in a batch
 share_batch_size = 10
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 
 # Protocol Extensions Configuration
 # Extensions that the pool supports (will accept if requested by clients)
diff --git a/pool-apps/pool/config-examples/testnet4/pool-config-bitcoin-core-ipc-example.toml b/pool-apps/pool/config-examples/testnet4/pool-config-bitcoin-core-ipc-example.toml
index a29be049d..40438e2b6 100644
--- a/pool-apps/pool/config-examples/testnet4/pool-config-bitcoin-core-ipc-example.toml
+++ b/pool-apps/pool/config-examples/testnet4/pool-config-bitcoin-core-ipc-example.toml
@@ -25,6 +25,12 @@ pool_signature = "Stratum V2 SRI Pool"
 shares_per_minute = 6.0
 # How many shares do we want to acknowledge in a batch
 share_batch_size = 10
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 
 # Monitoring HTTP server address for exposing channel data (optional)
 monitoring_address = "127.0.0.1:9090"
diff --git a/pool-apps/pool/config-examples/testnet4/pool-config-hosted-sv2-tp-example.toml b/pool-apps/pool/config-examples/testnet4/pool-config-hosted-sv2-tp-example.toml
index 632370cb1..fce757d74 100644
--- a/pool-apps/pool/config-examples/testnet4/pool-config-hosted-sv2-tp-example.toml
+++ b/pool-apps/pool/config-examples/testnet4/pool-config-hosted-sv2-tp-example.toml
@@ -25,6 +25,12 @@ pool_signature = "Stratum V2 SRI Pool"
 shares_per_minute = 6.0
 # How many shares do we want to acknowledge in a batch
 share_batch_size = 10
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 
 # Monitoring HTTP server address for exposing channel data (optional)
 monitoring_address = "127.0.0.1:9090"
diff --git a/pool-apps/pool/config-examples/testnet4/pool-config-local-sv2-tp-example.toml b/pool-apps/pool/config-examples/testnet4/pool-config-local-sv2-tp-example.toml
index 9ff3b80f1..b93d07186 100644
--- a/pool-apps/pool/config-examples/testnet4/pool-config-local-sv2-tp-example.toml
+++ b/pool-apps/pool/config-examples/testnet4/pool-config-local-sv2-tp-example.toml
@@ -25,6 +25,12 @@ pool_signature = "Stratum V2 SRI Pool"
 shares_per_minute = 6.0
 # How many shares do we want to acknowledge in a batch
 share_batch_size = 10
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 
 # Monitoring HTTP server address for exposing channel data (optional)
 monitoring_address = "127.0.0.1:9090"
diff --git a/pool-apps/pool/config-examples/testnet4/pool-jds-config-bitcoin-core-ipc-example.toml b/pool-apps/pool/config-examples/testnet4/pool-jds-config-bitcoin-core-ipc-example.toml
index 033299581..689e0e5d9 100644
--- a/pool-apps/pool/config-examples/testnet4/pool-jds-config-bitcoin-core-ipc-example.toml
+++ b/pool-apps/pool/config-examples/testnet4/pool-jds-config-bitcoin-core-ipc-example.toml
@@ -25,6 +25,12 @@ pool_signature = "Stratum V2 SRI Pool"
 shares_per_minute = 6.0
 # How many shares do we want to acknowledge in a batch
 share_batch_size = 10
+# Past jobs retained per channel for late-share validation (optional). Unset or 0 uses
+# the channels_sv2 default (16), which covers the fastest configurable template cadence.
+# Set `ceil(16s / your template period)` to reclaim memory: 3 at a typical 6s mainnet
+# cadence is 13.5 kB per channel instead of 72.
+# max_past_jobs = 3
+
 
 # Protocol Extensions Configuration
 # Extensions that the pool supports (will accept if requested by clients)
diff --git a/pool-apps/pool/src/lib/channel_manager/mining_message_handler.rs b/pool-apps/pool/src/lib/channel_manager/mining_message_handler.rs
index 2945cb052..248e9cb7a 100644
--- a/pool-apps/pool/src/lib/channel_manager/mining_message_handler.rs
+++ b/pool-apps/pool/src/lib/channel_manager/mining_message_handler.rs
@@ -238,6 +238,7 @@ impl HandleMiningMessagesFromClientOwnedAsync for ChannelManager {
                     self.share_batch_size,
                     self.shares_per_minute,
                     self.pool_tag_string.clone(),
+                    self.max_past_jobs,
                 ) {
                     Ok(channel) => channel,
                     Err(e) => match e {
@@ -477,6 +478,7 @@ impl HandleMiningMessagesFromClientOwnedAsync for ChannelManager {
                     self.share_batch_size,
                     self.shares_per_minute,
                     self.pool_tag_string.clone(),
+                    self.max_past_jobs,
                 ) {
                     Ok(channel) => channel,
                     Err(e) => match e {
diff --git a/pool-apps/pool/src/lib/channel_manager/mod.rs b/pool-apps/pool/src/lib/channel_manager/mod.rs
index 5e9ad4cff..7c171c08b 100644
--- a/pool-apps/pool/src/lib/channel_manager/mod.rs
+++ b/pool-apps/pool/src/lib/channel_manager/mod.rs
@@ -111,6 +111,8 @@ pub struct ChannelManager {
     pool_tag_string: String,
     share_batch_size: usize,
     shares_per_minute: SharesPerMinute,
+    /// Past jobs retained per channel; `None` uses the `channels_sv2` default.
+    max_past_jobs: Option<usize>,
     coinbase_reward_script: CoinbaseRewardScript,
     /// Protocol extensions that the pool supports (will accept if requested by clients).
     supported_extensions: Vec<u16>,
@@ -183,6 +185,14 @@ impl ChannelManager {
             downstream_receiver,
         };
 
+        // Record the cap actually in force. When unset it comes from the `channels_sv2`
+        // default, so it appears nowhere in this application's own config and is
+        // otherwise not recoverable from a running pool.
+        match config.max_past_jobs() {
+            Some(n) if n > 0 => info!(max_past_jobs = n, "past-jobs retention cap configured"),
+            _ => info!("past-jobs retention cap: using channels_sv2 default"),
+        }
+
         let channel_manager = ChannelManager {
             downstreams: SharedMap::new(),
             extranonce_allocator: SharedLock::new(extranonce_allocator),
@@ -194,6 +204,7 @@ impl ChannelManager {
             channel_manager_io,
             share_batch_size: config.share_batch_size(),
             shares_per_minute: config.shares_per_minute(),
+            max_past_jobs: config.max_past_jobs(),
             pool_tag_string: config.pool_signature().to_string(),
             coinbase_reward_script: config.coinbase_reward_script().clone(),
             supported_extensions: config.supported_extensions().to_vec(),
diff --git a/pool-apps/pool/src/lib/config.rs b/pool-apps/pool/src/lib/config.rs
index 4322075c9..49cc10e90 100644
--- a/pool-apps/pool/src/lib/config.rs
+++ b/pool-apps/pool/src/lib/config.rs
@@ -50,6 +50,13 @@ pub struct PoolConfig {
     jds: Option<JDSPartialConfig>,
     #[serde(default)]
     monitoring_cache_refresh_secs: Option<u64>,
+    /// Past jobs retained per channel for late-share validation.
+    ///
+    /// `None` (the default) and `Some(0)` both select the `channels_sv2` default. The cap is
+    /// really a retention window — `cap / template rate` — and the template rate belongs to
+    /// this deployment, not to the library, which is why it is settable here.
+    #[serde(default)]
+    max_past_jobs: Option<usize>,
 }
 
 impl PoolConfig {
@@ -83,6 +90,7 @@ impl PoolConfig {
             pool_signature: pool_connection.signature,
             shares_per_minute,
             share_batch_size,
+            max_past_jobs: None,
             log_file: None,
             server_id,
             supported_extensions,
@@ -139,6 +147,17 @@ impl PoolConfig {
     }
 
     /// Returns the shares per minute.
+    /// Past jobs retained per channel, or `None` to use the `channels_sv2` default.
+    pub fn max_past_jobs(&self) -> Option<usize> {
+        self.max_past_jobs
+    }
+
+    /// Overrides the retained past-jobs cap. Mainly for tests and A/B deployments that vary
+    /// it between otherwise-identical instances.
+    pub fn set_max_past_jobs(&mut self, max_past_jobs: Option<usize>) {
+        self.max_past_jobs = max_past_jobs;
+    }
+
     pub fn shares_per_minute(&self) -> f32 {
         self.shares_per_minute
     }
@@ -239,3 +258,65 @@ impl ConnectionConfig {
         }
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use stratum_apps::config_helpers::load_config;
+
+    /// Writes a minimal pool config with `extra` spliced in, so each test varies exactly
+    /// one thing, and loads it through the SAME loader the binary uses — not a bare
+    /// `toml::from_str`. That way the test covers serde attributes, the env-override layer
+    /// and the enum handling, rather than just the struct definition.
+    fn load_with(extra: &str, name: &str) -> PoolConfig {
+        let path = std::env::temp_dir().join(format!("pool-config-{name}.toml"));
+        std::fs::write(
+            &path,
+            format!(
+                r#"
+listen_address = "0.0.0.0:34254"
+authority_public_key = "9auqWEzQDVyd2oe1JVGFLMLHZtCo2FFqZwtKA5gd9xbuEu7PH72"
+authority_secret_key = "mkDLTBBRxdBv998612qipDYoTK3YUrqLe8uWw7gu3iXbSrn2n"
+cert_validity_sec = 3600
+coinbase_reward_script = "addr(tb1qa0sm0hxzj0x25rh8gw5xlzwlsfvvyz8u96w3p8)"
+pool_signature = "test"
+shares_per_minute = 6.0
+share_batch_size = 10
+{extra}
+
+[template_provider_type.Sv2Tp]
+address = "127.0.0.1:8442"
+"#
+            ),
+        )
+        .expect("write temp config");
+        let cfg = load_config(&path, "POOL_TEST_UNUSED", &[], &["template_provider_type"])
+            .expect("config loads");
+        let _ = std::fs::remove_file(&path);
+        cfg
+    }
+
+    #[test]
+    fn max_past_jobs_defaults_to_none_when_absent() {
+        // Absent must mean "use the library default", not 0: a zero cap would evict the job
+        // that just retired and reject the most common late share as invalid-job-id.
+        assert_eq!(load_with("", "absent").max_past_jobs(), None);
+    }
+
+    #[test]
+    fn max_past_jobs_is_read_from_config() {
+        // The A/B deployment varies this single value between otherwise-identical pools, so
+        // it has to survive loading verbatim.
+        assert_eq!(
+            load_with("max_past_jobs = 2", "set").max_past_jobs(),
+            Some(2)
+        );
+    }
+
+    #[test]
+    fn max_past_jobs_setter_overrides() {
+        let mut cfg = load_with("", "setter");
+        cfg.set_max_past_jobs(Some(50));
+        assert_eq!(cfg.max_past_jobs(), Some(50));
+    }
+}
diff --git a/stratum-apps/Cargo.lock b/stratum-apps/Cargo.lock
index b89cea50d..73d5f05e3 100644
--- a/stratum-apps/Cargo.lock
+++ b/stratum-apps/Cargo.lock
@@ -774,7 +774,7 @@ checksum = "32637268377fc7b10a8c6d51de3e7fba1ce5dd371a96e342b34e6078db558e7f"
 [[package]]
 name = "binary_sv2"
 version = "7.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "buffer_sv2",
  "derive_codec_sv2",
@@ -940,7 +940,7 @@ dependencies = [
 [[package]]
 name = "buffer_sv2"
 version = "3.0.1"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "aes-gcm",
 ]
@@ -1071,7 +1071,7 @@ dependencies = [
 [[package]]
 name = "channels_sv2"
 version = "8.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "bitcoin",
@@ -1117,7 +1117,7 @@ dependencies = [
 [[package]]
 name = "codec_sv2"
 version = "7.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "buffer_sv2",
@@ -1140,7 +1140,7 @@ dependencies = [
 [[package]]
 name = "common_messages_sv2"
 version = "9.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
 ]
@@ -1341,7 +1341,7 @@ dependencies = [
 [[package]]
 name = "derive_codec_sv2"
 version = "2.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 
 [[package]]
 name = "digest"
@@ -1482,7 +1482,7 @@ checksum = "0206175f82b8d6bf6652ff7d71a1e27fd2e4efde587fd368662814d6ec1d9ce0"
 [[package]]
 name = "extensions_sv2"
 version = "0.3.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
 ]
@@ -1540,7 +1540,7 @@ dependencies = [
 [[package]]
 name = "framing_sv2"
 version = "8.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "buffer_sv2",
@@ -1711,7 +1711,7 @@ dependencies = [
 [[package]]
 name = "handlers_sv2"
 version = "0.6.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "common_messages_sv2",
@@ -2140,7 +2140,7 @@ dependencies = [
 [[package]]
 name = "job_declaration_sv2"
 version = "10.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
 ]
@@ -2328,7 +2328,7 @@ checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
 [[package]]
 name = "mining_sv2"
 version = "12.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
 ]
@@ -2368,7 +2368,7 @@ dependencies = [
 [[package]]
 name = "noise_sv2"
 version = "2.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "chacha20poly1305",
  "rand 0.8.5",
@@ -2492,7 +2492,7 @@ dependencies = [
 [[package]]
 name = "parsers_sv2"
 version = "0.6.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "common_messages_sv2",
@@ -3442,7 +3442,7 @@ dependencies = [
 [[package]]
 name = "stratum-core"
 version = "0.6.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "bitcoin",
@@ -3465,7 +3465,7 @@ dependencies = [
 [[package]]
 name = "stratum_translation"
 version = "0.5.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "bitcoin",
@@ -3506,7 +3506,7 @@ checksum = "13c2bddecc57b384dee18652358fb23172facb8a2c51ccc10d74c157bdea3292"
 [[package]]
 name = "sv1_api"
 version = "6.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
  "bitcoin",
@@ -3562,7 +3562,7 @@ checksum = "adb6935a6f5c20170eeceb1a3835a49e12e19d792f6dd344ccc76a985ca5a6ca"
 [[package]]
 name = "template_distribution_sv2"
 version = "7.0.0"
-source = "git+https://github.com/stratum-mining/stratum?branch=main#aa2427007358b6182ee28316f07e1915bcf2fd3d"
+source = "git+https://github.com/marafoundation/stratum?branch=feat%2Fconfigurable-max-past-jobs#60dfd84d9a7c55ac58a2edc08d6d21b04849fca1"
 dependencies = [
  "binary_sv2",
 ]
diff --git a/stratum-apps/Cargo.toml b/stratum-apps/Cargo.toml
index 93d1490b4..3b14927be 100644
--- a/stratum-apps/Cargo.toml
+++ b/stratum-apps/Cargo.toml
@@ -17,7 +17,7 @@ keywords = ["stratum", "mining", "bitcoin", "protocol", "sv2"]
 # fetching from github enables synchronizing development workflows across sv2-apps and stratum repos
 # it MUST be changed before stratum-apps is published to crates.io
 # with the proper version of stratum-core being fetched from crates.io as well
-stratum-core = { git = "https://github.com/stratum-mining/stratum", branch = "main", optional = true }
+stratum-core = { git = "https://github.com/marafoundation/stratum", branch = "feat/configurable-max-past-jobs", optional = true }
 bitcoin-core-sv2 = { package = "bitcoin_core_sv2", version = "0.5.0", path = "../bitcoin-core-sv2", optional = true }
 
 # External dependencies needed by the modules