Improve federation API docs and errors

AUDITS.md

@@ -73,6 +73,8 @@ Status legend: ✅ implemented, 🟡 planned/in-progress, ⬜ not started.
 | `ASL/INDEXES/1` | 🟡 | Taxonomy planned. |
 | `ASL/TGK-EXEC-PLAN/1` | 🟡 | Encoding implemented; executor out of scope. |
 | `ENC/ASL-TGK-EXEC-PLAN/1` | ✅ | Plan encoding implemented. |
+| `ASL/FEDERATION/1` | ✅ | Core federation primitives implemented. |
+| `ASL/FEDERATION-REPLAY/1` | ✅ | Deterministic replay and view construction implemented. |
 | `ASL/SYSTEM/1` | 🟡 | Cross-cutting view planned. |
 | `TGK/1` | 🟡 | Semantic layer planned. |
 
@@ -348,3 +350,15 @@ Status legend: ✅ completed, ⬜ pending.
   embedded commit-message appendix; tightened wording throughout; bumped the
   document version/date.
 - Tests: N/A (documentation-only change).
+
+## 2026-02-XX — Federation core (`tier1/asl-federation-1.md`, `tier1/asl-federation-replay-1.md`)
+- Scope: core federation registry, ingest validation, deterministic replay, view
+  construction, and resolve semantics.
+- Findings: missing record typing and identity coverage for PER/TGK/tombstones;
+  policy gating needed explicit per-domain + optional per-record handling; view
+  build and resolve error reporting needed explicit codes and tests.
+- Resolution: added federation registry storage, ingest validation, replay/view
+  build, resolve APIs, and tests for ordering, tombstone scoping, conflicts,
+  bounds, and metadata preservation; documented middle-layer boundary and
+  ref-only remote fetch guidance.
+- Tests: user reported “100% tests passed, 0 tests failed out of 29”.

include/amduat/fed/registry.h

@@ -21,7 +21,7 @@ typedef struct {
   uint8_t policy_ok;
   uint8_t reserved[6];
   amduat_hash_id_t policy_hash_id;
-  amduat_octets_t policy_hash; /* Empty when unknown. */
+  amduat_octets_t policy_hash; /* Empty when unknown; caller-owned bytes. */
 } amduat_fed_domain_state_t;
 
 typedef struct {
@@ -44,9 +44,11 @@ const amduat_fed_domain_state_t *amduat_fed_registry_value_lookup(
 
 void amduat_fed_registry_value_free(amduat_fed_registry_value_t *value);
 
+/* Encode/Decode allocate buffers; caller frees via amduat_octets_free. */
 bool amduat_fed_registry_encode(const amduat_fed_registry_value_t *value,
                                 amduat_octets_t *out_bytes);
 
+/* Decode allocates policy_hash bytes; free via amduat_fed_registry_value_free. */
 bool amduat_fed_registry_decode(amduat_octets_t bytes,
                                 amduat_fed_registry_value_t *out_value);
 

include/amduat/fed/replay.h

@@ -28,7 +28,7 @@ typedef struct {
 
 typedef struct {
   amduat_fed_record_type_t type;
-  amduat_reference_t ref;
+  amduat_reference_t ref; /* PER/TGK identities are ASL references. */
 } amduat_fed_record_id_t;
 
 typedef struct {
@@ -44,6 +44,7 @@ typedef struct {
   size_t len;
 } amduat_fed_replay_view_t;
 
+/* Caller frees record ids with amduat_fed_replay_view_free. */
 bool amduat_fed_record_validate(const amduat_fed_record_t *record);
 
 bool amduat_fed_replay_domain(const amduat_fed_record_t *records,

include/amduat/fed/view.h

@@ -39,7 +39,16 @@ typedef struct {
   size_t denies_len;
 } amduat_fed_view_t;
 
-bool amduat_fed_view_build(const amduat_fed_record_t *records,
+typedef enum {
+  AMDUAT_FED_VIEW_OK = 0,
+  AMDUAT_FED_VIEW_ERR_INVALID = 1,
+  AMDUAT_FED_VIEW_ERR_CONFLICT = 2,
+  AMDUAT_FED_VIEW_ERR_OOM = 3
+} amduat_fed_view_error_t;
+
+/* Caller frees records/denies with amduat_fed_view_free. */
+amduat_fed_view_error_t amduat_fed_view_build(
+    const amduat_fed_record_t *records,
     size_t count,
     uint32_t local_domain_id,
     const amduat_fed_view_bounds_t *bounds,

src/near_core/fed/view.c

@@ -75,22 +75,23 @@ static void amduat_fed_policy_deny_free(amduat_fed_policy_deny_t *deny) {
   memset(deny, 0, sizeof(*deny));
 }
 
-static bool amduat_fed_view_append(amduat_fed_view_t *view,
+static amduat_fed_view_error_t amduat_fed_view_append(
+    amduat_fed_view_t *view,
     const amduat_fed_record_t *records,
     size_t count) {
   size_t i;
   size_t base_len;
 
   if (count == 0u) {
-    return true;
+    return AMDUAT_FED_VIEW_OK;
   }
   if (view->len > SIZE_MAX - count) {
-    return false;
+    return AMDUAT_FED_VIEW_ERR_OOM;
   }
   if (view->records == NULL) {
     view->records = (amduat_fed_record_t *)calloc(count, sizeof(*view->records));
     if (view->records == NULL) {
-      return false;
+      return AMDUAT_FED_VIEW_ERR_OOM;
     }
   } else {
     amduat_fed_record_t *next =
@@ -98,7 +99,7 @@ static bool amduat_fed_view_append(amduat_fed_view_t *view,
                                        (view->len + count) *
                                            sizeof(*view->records));
     if (next == NULL) {
-      return false;
+      return AMDUAT_FED_VIEW_ERR_OOM;
     }
     view->records = next;
   }
@@ -115,7 +116,7 @@ static bool amduat_fed_view_append(amduat_fed_view_t *view,
           amduat_fed_record_free(&view->records[j]);
         }
         view->len = base_len;
-        return false;
+        return AMDUAT_FED_VIEW_ERR_CONFLICT;
       }
       continue;
     }
@@ -127,14 +128,15 @@ static bool amduat_fed_view_append(amduat_fed_view_t *view,
         amduat_fed_record_free(&view->records[j]);
       }
       view->len = base_len;
-      return false;
+      return AMDUAT_FED_VIEW_ERR_OOM;
     }
     view->len++;
   }
-  return true;
+  return AMDUAT_FED_VIEW_OK;
 }
 
-bool amduat_fed_view_build(const amduat_fed_record_t *records,
+amduat_fed_view_error_t amduat_fed_view_build(
+    const amduat_fed_record_t *records,
     size_t count,
     uint32_t local_domain_id,
     const amduat_fed_view_bounds_t *bounds,
@@ -146,7 +148,7 @@ bool amduat_fed_view_build(const amduat_fed_record_t *records,
   amduat_fed_view_t view;
 
   if (out_view == NULL) {
-    return false;
+    return AMDUAT_FED_VIEW_ERR_INVALID;
   }
   out_view->records = NULL;
   out_view->len = 0;
@@ -155,7 +157,7 @@ bool amduat_fed_view_build(const amduat_fed_record_t *records,
   out_view->denies_len = 0;
 
   if (records == NULL && count != 0u) {
-    return false;
+    return AMDUAT_FED_VIEW_ERR_INVALID;
   }
 
   view.records = NULL;
@@ -165,13 +167,13 @@ bool amduat_fed_view_build(const amduat_fed_record_t *records,
   view.denies_len = 0;
 
   if (denies_len != 0u && denies == NULL) {
-    return false;
+    return AMDUAT_FED_VIEW_ERR_INVALID;
   }
   if (denies_len != 0u) {
     view.denies = (amduat_fed_policy_deny_t *)calloc(denies_len,
                                                      sizeof(*view.denies));
     if (view.denies == NULL) {
-      return false;
+      return AMDUAT_FED_VIEW_ERR_OOM;
     }
     for (i = 0; i < denies_len; ++i) {
       if (!amduat_fed_policy_deny_clone(&denies[i], &view.denies[i])) {
@@ -180,7 +182,7 @@ bool amduat_fed_view_build(const amduat_fed_record_t *records,
           amduat_fed_policy_deny_free(&view.denies[j]);
         }
         free(view.denies);
-        return false;
+        return AMDUAT_FED_VIEW_ERR_OOM;
       }
     }
     view.denies_len = denies_len;
@@ -214,7 +216,7 @@ bool amduat_fed_view_build(const amduat_fed_record_t *records,
         (amduat_fed_record_t *)calloc(domain_count, sizeof(*domain_records));
     if (domain_records == NULL) {
       amduat_fed_view_free(&view);
-      return false;
+      return AMDUAT_FED_VIEW_ERR_OOM;
     }
 
     domain_count = 0;
@@ -234,7 +236,7 @@ bool amduat_fed_view_build(const amduat_fed_record_t *records,
         }
         free(domain_records);
         amduat_fed_view_free(&view);
-        return false;
+        return AMDUAT_FED_VIEW_ERR_OOM;
       }
       domain_count++;
     }
@@ -251,20 +253,25 @@ bool amduat_fed_view_build(const amduat_fed_record_t *records,
     free(domain_records);
     if (!ok) {
       amduat_fed_view_free(&view);
-      return false;
+      return AMDUAT_FED_VIEW_ERR_INVALID;
     }
-    if (!amduat_fed_view_append(&view,
+    {
+      amduat_fed_view_error_t append_err;
+
+      append_err = amduat_fed_view_append(&view,
                                           domain_view.records,
-                                domain_view.len)) {
+                                          domain_view.len);
+      if (append_err != AMDUAT_FED_VIEW_OK) {
         amduat_fed_replay_view_free(&domain_view);
         amduat_fed_view_free(&view);
-      return false;
+        return append_err;
+      }
     }
     amduat_fed_replay_view_free(&domain_view);
   }
 
   *out_view = view;
-  return true;
+  return AMDUAT_FED_VIEW_OK;
 }
 
 void amduat_fed_view_free(amduat_fed_view_t *view) {

tests/fed/test_fed_view.c

@@ -105,7 +105,8 @@ static int test_view_and_resolve(void) {
   denies[0].id.ref = ref_d;
   denies[0].reason_code = 0;
 
-  if (!amduat_fed_view_build(records, 4, 1, bounds, 2, denies, 1, &view)) {
+  if (amduat_fed_view_build(records, 4, 1, bounds, 2, denies, 1, &view) !=
+      AMDUAT_FED_VIEW_OK) {
     fprintf(stderr, "view build failed\n");
     return 1;
   }
@@ -167,7 +168,8 @@ static int test_view_conflict(void) {
   bounds[1].snapshot_id = 1;
   bounds[1].log_prefix = 10;
 
-  if (amduat_fed_view_build(records, 2, 1, bounds, 2, NULL, 0, &view)) {
+  if (amduat_fed_view_build(records, 2, 1, bounds, 2, NULL, 0, &view) !=
+      AMDUAT_FED_VIEW_ERR_CONFLICT) {
     fprintf(stderr, "expected conflict\n");
     amduat_fed_view_free(&view);
     return 1;
@@ -191,11 +193,13 @@ static int test_view_rebuild_metadata(void) {
   bounds[0].snapshot_id = 1;
   bounds[0].log_prefix = 10;
 
-  if (!amduat_fed_view_build(records, 1, 1, bounds, 1, NULL, 0, &view_a)) {
+  if (amduat_fed_view_build(records, 1, 1, bounds, 1, NULL, 0, &view_a) !=
+      AMDUAT_FED_VIEW_OK) {
     fprintf(stderr, "view rebuild build A failed\n");
     return 1;
   }
-  if (!amduat_fed_view_build(records, 1, 1, bounds, 1, NULL, 0, &view_b)) {
+  if (amduat_fed_view_build(records, 1, 1, bounds, 1, NULL, 0, &view_b) !=
+      AMDUAT_FED_VIEW_OK) {
     fprintf(stderr, "view rebuild build B failed\n");
     amduat_fed_view_free(&view_a);
     return 1;