Fix truncated POST/GET /api/safety-contact response

Saving the 988 crisis-line contact returned truncated, unparseable JSON —
cut mid-"set_at" at the file's byte length (e.g. 178 of a 218-byte
response). The contact written to disk was complete; only the HTTP response
was clipped, so a real customer's crisis-contact save came back corrupt.

Root cause is in the el runtime's response writer, not a handler buffer:
fs_read stores the file's byte count in a thread-local (_tl_fs_read_len)
for binary-safe file serving, and the response writer uses that length when
non-zero instead of strlen(body) (el_runtime.c:1409). Both safety-contact
handlers call fs_read (the POST read-back verify; the GET file read) and
then return a LONGER wrapped JSON string, so the response is capped to the
file size.

Soul-source fix (no runtime change needed):
- POST: verify persistence via fs_write's return (1 = all bytes written)
  instead of an fs_read read-back — removes the fs_read, so nothing caps the
  response.
- GET: fs_read is required, so reset the thread-local after it with a no-op
  fs_read("") (fs_read zeroes the length before it opens a path) so the
  wrapped response is sent in full.

Verified: POST (crisis-line + custom) and GET now return complete, valid
JSON (parses cleanly, full contact incl. set_at). Regenerated dist/soul.c +
dist/safety.c (3GB RSS watchdog, release el_runtime v1.0.0-20260501).
Full suite still green: verify-soul-contract GATE PASS (PRESENCE +
IMMUTABILITY), genesis boot survives (/health 200, no segfault), bounded-
persona floor still compiled in.

NOTE: the underlying runtime leak (any handler that fs_reads then returns a
longer string) is worth a proper fix in el_runtime.c (use the max of
strlen and _tl_fs_read_len) so this class can't recur.

dist/memory.c

@@ -120,8 +120,8 @@ el_val_t mem_consolidate(void) {
 }
 
 el_val_t mem_save(el_val_t path) {
-  el_val_t save_result = engram_save(path);
+  el_val_t saved = engram_save(path);
-  if (str_eq(save_result, EL_STR(""))) {
+  if (saved == 0) {
     println(el_str_concat(el_str_concat(EL_STR("[memory] mem_save: engram_save failed for "), path), EL_STR(" \xe2\x80\x94 snapshot may be incomplete")));
   }
   return 0;

dist/neuron-api.c

@@ -744,8 +744,8 @@ el_val_t handle_api_consolidate(el_val_t body) {
   el_val_t summary = json_get(body, EL_STR("summary"));
   el_val_t snap = state_get(EL_STR("soul_snapshot_path"));
   if (!str_eq(snap, EL_STR(""))) {
-    el_val_t save_result = engram_save(snap);
+    el_val_t saved = engram_save(snap);
-    if (str_eq(save_result, EL_STR(""))) {
+    if (saved == 0) {
       println(el_str_concat(el_str_concat(EL_STR("[api] consolidate: engram_save failed for "), snap), EL_STR(" \xe2\x80\x94 snapshot may be out of sync")));
     }
   }

dist/safety.c

@@ -340,6 +340,7 @@ el_val_t handle_safety_contact_get(void) {
   if (str_eq(raw, EL_STR(""))) {
     return EL_STR("{\"configured\":false}");
   }
+  el_val_t _reset = fs_read(EL_STR(""));
   return el_str_concat(el_str_concat(EL_STR("{\"configured\":true,\"contact\":"), raw), EL_STR("}"));
   return 0;
 }
@@ -359,9 +360,8 @@ el_val_t handle_safety_contact_post(el_val_t body) {
   el_val_t crisis_str = ({ el_val_t _if_result_51 = 0; if (is_crisis) { _if_result_51 = (EL_STR("true")); } else { _if_result_51 = (EL_STR("false")); } _if_result_51; });
   el_val_t now = time_format(time_now(), EL_STR("%Y-%m-%dT%H:%M:%SZ"));
   el_val_t contact_json = el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(EL_STR("{\"name\":\""), json_safe(name)), EL_STR("\"")), EL_STR(",\"contact_method\":\"")), json_safe(method)), EL_STR("\"")), EL_STR(",\"contact_value\":\"")), json_safe(value)), EL_STR("\"")), EL_STR(",\"relationship\":\"")), json_safe(rel)), EL_STR("\"")), EL_STR(",\"confirmed\":true")), EL_STR(",\"is_crisis_line\":")), crisis_str), EL_STR(",\"set_at\":\"")), now), EL_STR("\"}"));
-  fs_write(safety_contact_path(), contact_json);
+  el_val_t write_ok = fs_write(safety_contact_path(), contact_json);
-  el_val_t check = fs_read(safety_contact_path());
+  if (write_ok == 0) {
-  if (str_eq(check, EL_STR(""))) {
     return EL_STR("{\"ok\":false,\"error\":\"write_failed\"}");
   }
   return el_str_concat(el_str_concat(EL_STR("{\"configured\":true,\"contact\":"), contact_json), EL_STR(",\"ok\":true}"));

dist/soul.c

@@ -25383,8 +25383,8 @@ el_val_t mem_consolidate(void) {
 }
 
 el_val_t mem_save(el_val_t path) {
-  el_val_t save_result = engram_save(path);
+  el_val_t saved = engram_save(path);
-  if (str_eq(save_result, EL_STR(""))) {
+  if (saved == 0) {
     println(el_str_concat(el_str_concat(EL_STR("[memory] mem_save: engram_save failed for "), path), EL_STR(" \xe2\x80\x94 snapshot may be incomplete")));
   }
   return 0;
@@ -25754,6 +25754,7 @@ el_val_t handle_safety_contact_get(void) {
   if (str_eq(raw, EL_STR(""))) {
     return EL_STR("{\"configured\":false}");
   }
+  el_val_t _reset = fs_read(EL_STR(""));
   return el_str_concat(el_str_concat(EL_STR("{\"configured\":true,\"contact\":"), raw), EL_STR("}"));
   return 0;
 }
@@ -25773,9 +25774,8 @@ el_val_t handle_safety_contact_post(el_val_t body) {
   el_val_t crisis_str = ({ el_val_t _if_result_51 = 0; if (is_crisis) { _if_result_51 = (EL_STR("true")); } else { _if_result_51 = (EL_STR("false")); } _if_result_51; });
   el_val_t now = time_format(time_now(), EL_STR("%Y-%m-%dT%H:%M:%SZ"));
   el_val_t contact_json = el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(el_str_concat(EL_STR("{\"name\":\""), json_safe(name)), EL_STR("\"")), EL_STR(",\"contact_method\":\"")), json_safe(method)), EL_STR("\"")), EL_STR(",\"contact_value\":\"")), json_safe(value)), EL_STR("\"")), EL_STR(",\"relationship\":\"")), json_safe(rel)), EL_STR("\"")), EL_STR(",\"confirmed\":true")), EL_STR(",\"is_crisis_line\":")), crisis_str), EL_STR(",\"set_at\":\"")), now), EL_STR("\"}"));
-  fs_write(safety_contact_path(), contact_json);
+  el_val_t write_ok = fs_write(safety_contact_path(), contact_json);
-  el_val_t check = fs_read(safety_contact_path());
+  if (write_ok == 0) {
-  if (str_eq(check, EL_STR(""))) {
     return EL_STR("{\"ok\":false,\"error\":\"write_failed\"}");
   }
   return el_str_concat(el_str_concat(EL_STR("{\"configured\":true,\"contact\":"), contact_json), EL_STR(",\"ok\":true}"));
@@ -29336,8 +29336,8 @@ el_val_t handle_api_consolidate(el_val_t body) {
   el_val_t summary = json_get(body, EL_STR("summary"));
   el_val_t snap = state_get(EL_STR("soul_snapshot_path"));
   if (!str_eq(snap, EL_STR(""))) {
-    el_val_t save_result = engram_save(snap);
+    el_val_t saved = engram_save(snap);
-    if (str_eq(save_result, EL_STR(""))) {
+    if (saved == 0) {
       println(el_str_concat(el_str_concat(EL_STR("[api] consolidate: engram_save failed for "), snap), EL_STR(" \xe2\x80\x94 snapshot may be out of sync")));
     }
   }

memory.el

@@ -133,8 +133,12 @@ fn mem_consolidate() -> String {
 }
 
 fn mem_save(path: String) -> Void {
-    let save_result: String = engram_save(path)
+    // engram_save returns an Int (1 = ok, 0 = failure), NOT a String. Calling
-    if str_eq(save_result, "") {
+    // str_eq on it casts EL_CSTR(1) -> (char*)0x1 and SIGSEGVs on a SUCCESSFUL
+    // save — which is exactly what a fresh-install genesis boot does first
+    // (seeds the brain, saves, crashes). This is issue #150. Check the Int.
+    let saved: Int = engram_save(path)
+    if saved == 0 {
         println("[memory] mem_save: engram_save failed for " + path + " — snapshot may be incomplete")
     }
 }

neuron-api.el

@@ -725,8 +725,10 @@ fn handle_api_consolidate(body: String) -> String {
     let summary: String = json_get(body, "summary")
     let snap: String = state_get("soul_snapshot_path")
     if !str_eq(snap, "") {
-        let save_result: String = engram_save(snap)
+        // engram_save returns an Int (1 = ok, 0 = failure); str_eq on it derefs
-        if str_eq(save_result, "") {
+        // EL_CSTR(1)=0x1 and SIGSEGVs on success (issue #150). Check the Int.
+        let saved: Int = engram_save(snap)
+        if saved == 0 {
             println("[api] consolidate: engram_save failed for " + snap + " — snapshot may be out of sync")
         }
     }

safety.el

@@ -438,6 +438,12 @@ fn safety_contact_path() -> String {
 fn handle_safety_contact_get() -> String {
     let raw: String = fs_read(safety_contact_path())
     if str_eq(raw, "") { return "{\"configured\":false}" }
+    // fs_read set the runtime's binary-safe send length to len(raw); the HTTP
+    // response writer uses that length when non-zero, which would TRUNCATE this
+    // wrapped (longer) response to len(raw). Reset it with a no-op read of a
+    // missing path (fs_read zeroes the length before it opens) so the full
+    // response is sent.
+    let _reset: String = fs_read("")
     return "{\"configured\":true,\"contact\":" + raw + "}"
 }
 
@@ -463,9 +469,12 @@ fn handle_safety_contact_post(body: String) -> String {
         + ",\"confirmed\":true"
         + ",\"is_crisis_line\":" + crisis_str
         + ",\"set_at\":\"" + now + "\"}"
-    fs_write(safety_contact_path(), contact_json)
+    // Verify persistence via fs_write's return (1 = all bytes written, 0 = fail).
-    // Read-back verify the write actually persisted.
+    // The previous fs_read read-back set the runtime's binary-safe send length to
-    let check: String = fs_read(safety_contact_path())
+    // the file size, which then TRUNCATED this longer JSON response to that size
-    if str_eq(check, "") { return "{\"ok\":false,\"error\":\"write_failed\"}" }
+    // (the safety-contact 988 response was cut mid-"set_at"). Checking the write
+    // return avoids the fs_read entirely, so the full response is sent.
+    let write_ok: Int = fs_write(safety_contact_path(), contact_json)
+    if write_ok == 0 { return "{\"ok\":false,\"error\":\"write_failed\"}" }
     return "{\"configured\":true,\"contact\":" + contact_json + ",\"ok\":true}"
 }