From 3140d3054affec5e2196e31d51f4d5341f50ef6d Mon Sep 17 00:00:00 2001
From: Meta Vens <rwvens@hotmail.com>
Date: Mon, 24 Aug 2026 04:51:24 +0200
Subject: [PATCH] Delete dead Resident Self receipt contract

---
 epiphany-core/src/lib.rs                      |  1 -
 epiphany-core/src/resident_self.rs            | 51 +++++++------------
 .../src/surfaces/coordinator_contract.rs      | 14 -----
 3 files changed, 17 insertions(+), 49 deletions(-)

diff --git a/epiphany-core/src/lib.rs b/epiphany-core/src/lib.rs
index 2d523c9b..f8888625 100644
--- a/epiphany-core/src/lib.rs
+++ b/epiphany-core/src/lib.rs
@@ -353,7 +353,6 @@ pub use surfaces::AdmittedModelDirectionConsiderationContextProjection;
 pub use surfaces::EpiphanyCoordinatorAction;
 pub use surfaces::EpiphanyCoordinatorDecision;
 pub use surfaces::EpiphanyCoordinatorInput;
-pub use surfaces::EpiphanyCoordinatorRoleResultStatus;
 pub use surfaces::EpiphanyCoordinatorRoleStatus;
 pub use surfaces::EpiphanyCrrcAction;
 pub use surfaces::EpiphanyCrrcResultStatus;
diff --git a/epiphany-core/src/resident_self.rs b/epiphany-core/src/resident_self.rs
index aee8a9a6..692cd8bf 100644
--- a/epiphany-core/src/resident_self.rs
+++ b/epiphany-core/src/resident_self.rs
@@ -8,9 +8,7 @@ use std::collections::{BTreeSet, HashSet};
 use std::path::{Path, PathBuf};
 
 pub const RESIDENT_SELF_STATE_KEY: &str = "resident-self";
-pub const RESIDENT_SELF_STATE_SCHEMA_VERSION: &str = "epiphany.resident_self.state.v1";
-pub const RESIDENT_SELF_RUNTIME_RECEIPT_SCHEMA_VERSION: &str =
-    "epiphany.resident_self.runtime_receipt.v0";
+pub const RESIDENT_SELF_STATE_SCHEMA_VERSION: &str = "epiphany.resident_self.state.v2";
 pub const RESIDENT_SELF_PRESSURE_SCHEMA_VERSION: &str = "epiphany.resident_self.pressure.v0";
 pub const RESIDENT_SELF_COORDINATOR_CONTINUATION_PRESSURE_KIND: &str =
     "coordinator-internal-continuation";
@@ -530,32 +528,6 @@ impl Default for ResidentSelfState {
     }
 }
 
-#[derive(Clone, Debug, PartialEq, Eq, DatabaseEntry)]
-#[cultcache(
-    type = "epiphany.resident_self.runtime_receipt.v0",
-    schema = "ResidentSelfRuntimeReceipt"
-)]
-pub struct ResidentSelfRuntimeReceipt {
-    #[cultcache(key = 0)]
-    pub schema_version: String,
-    #[cultcache(key = 1)]
-    pub receipt_id: String,
-    #[cultcache(key = 2)]
-    pub occurred_at_millis: u64,
-    #[cultcache(key = 3)]
-    pub status: String,
-    #[cultcache(key = 4)]
-    pub reason: String,
-    #[cultcache(key = 5, default)]
-    pub turn_id: Option<String>,
-    #[cultcache(key = 6, default)]
-    pub coordinator_receipt_id: Option<String>,
-    #[cultcache(key = 7, default)]
-    pub process_id: Option<u32>,
-    #[cultcache(key = 8, default)]
-    pub private_state_exposed: bool,
-}
-
 #[derive(Clone, Debug, PartialEq, Eq)]
 pub enum ChildObservation {
     Running,
@@ -785,7 +757,6 @@ pub fn resident_prepared_launch_thread_id(prepared: &ResidentSelfPreparedLaunch)
 fn state_cache(path: &Path) -> Result<CultCache> {
     let mut cache = CultCache::new();
     cache.register_entry_type::<ResidentSelfState>()?;
-    cache.register_entry_type::<ResidentSelfRuntimeReceipt>()?;
     cache.register_entry_type::<ResidentSelfPressure>()?;
     cache.register_entry_type::<ResidentSelfGrant>()?;
     cache.register_entry_type::<ResidentSelfTerminalReceipt>()?;
@@ -802,7 +773,6 @@ fn state_cache(path: &Path) -> Result<CultCache> {
             ));
         }
         let owned = envelope.r#type == ResidentSelfState::TYPE
-            || envelope.r#type == ResidentSelfRuntimeReceipt::TYPE
             || envelope.r#type == ResidentSelfPressure::TYPE
             || envelope.r#type == ResidentSelfGrant::TYPE
             || envelope.r#type == ResidentSelfTerminalReceipt::TYPE
@@ -822,9 +792,6 @@ fn state_cache(path: &Path) -> Result<CultCache> {
             ResidentSelfState::TYPE => {
                 cache.load_envelope::<ResidentSelfState>(envelope)?;
             }
-            ResidentSelfRuntimeReceipt::TYPE => {
-                cache.load_envelope::<ResidentSelfRuntimeReceipt>(envelope)?;
-            }
             ResidentSelfPressure::TYPE => {
                 cache.load_envelope::<ResidentSelfPressure>(envelope)?;
             }
@@ -2742,6 +2709,22 @@ mod pressure_replay_tests {
         }
     }
 
+    #[test]
+    fn obsolete_state_epoch_refuses_without_mutation() -> Result<()> {
+        let temp = tempfile::tempdir()?;
+        let store = temp.path().join("resident.cc");
+        let cache = state_cache(&store)?;
+        let mut state = ResidentSelfState::default();
+        state.schema_version = "epiphany.resident_self.state.v1".into();
+        SingleFileMessagePackBackingStore::new(&store)
+            .push(&cache.prepare_entry(RESIDENT_SELF_STATE_KEY, &state)?.0)?;
+        let before = std::fs::read(&store)?;
+        let error = load_resident_self_state(&store).unwrap_err();
+        assert!(error.to_string().contains("obsolete writable state epoch"));
+        assert_eq!(std::fs::read(&store)?, before);
+        Ok(())
+    }
+
     #[test]
     fn configured_operator_pressure_replay_preserves_the_first_document() -> Result<()> {
         let temp = tempfile::tempdir()?;
diff --git a/epiphany-core/src/surfaces/coordinator_contract.rs b/epiphany-core/src/surfaces/coordinator_contract.rs
index 479e432b..609a8b8c 100644
--- a/epiphany-core/src/surfaces/coordinator_contract.rs
+++ b/epiphany-core/src/surfaces/coordinator_contract.rs
@@ -12,20 +12,6 @@ pub enum EpiphanyCoordinatorRoleStatus {
     Blocked,
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub enum EpiphanyCoordinatorRoleResultStatus {
-    MissingState,
-    MissingBinding,
-    BackendUnavailable,
-    BackendMissing,
-    Pending,
-    Running,
-    Completed,
-    Failed,
-    Cancelled,
-}
-
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub enum EpiphanyCoordinatorAction {