§9 acceptance: grep-zero sweep — every internal x.ai/grok identifier renamed

The PRD's first acceptance gate now holds: grep -RinE '\bx\.ai\b|grok'
crates/ --include='*.rs' → 0 matches (exempt: NOTICE and third-party
license archives, README provenance, and the required 'Based on Grok
Build Open Source' attribution, now sourced from version_attribution.txt).

Wire-visible renames (both sides in this repo, changed in lockstep):
- Auth method id 'grok.com' → 'kimi-code' (AuthMethodKind::KimiCode).
- Every x.ai/* and _x.ai/* ACP ext method and meta key → kigi/* /
  _kigi/* (~200 names; grokShell → kigiShell). Session-file replay keeps
  a read-side alias for the legacy '_x.ai/session/update' method so
  existing updates.jsonl histories load; writes emit only the new name
  (both directions test-pinned).
- Agent types grok-build* → kigi* with a documented legacy-prefix alias
  at resolution time so persisted sessions keep resolving.
- ToolNamespace/BuiltinAgentName GrokBuild* → Kigi* (wire snake_case
  kigi/kigi_concise/kigi_hashline; schema regenerated); grok_build
  implementation dirs renamed to kigi*.
- x-grok-* headers → x-kigi-*, __GROK_* sentinels → __KIGI_*, themes
  grokday/groknight → kigiday/kiginight (old persisted values fall back
  to the default theme), web_fetch allowlist xAI hosts → kimi.com +
  moonshot platforms, changelog CDN → this repo, grok-build changelog
  archives deleted.
- BYOK default endpoint removed: [endpoints] api_base_url is now truly
  optional with NO default — consumers fail fast with the flag name when
  unset (no silent x.ai egress). Mock harnesses inject it explicitly.
- System-prompt identity fixed: 'released by xAI' → 'an unofficial
  community CLI for Kimi' (template + regenerated encrypted form).

Also repaired pre-existing grok-era test debt found by the sweep: the
stale trace_classify default-model pin, the grok-pager UA label test,
pty-harness stale-binary reuse and non-hermetic moonshot routing (a PTY
test could previously reach the real api.moonshot.cn), and the outdated
oauth fixture scope key.

Gates: §9 grep 0; fmt clean; workspace check/clippy 0/0 (-D warnings);
FULL cargo test --workspace: 234 suites, 21,961 passed, 0 failed;
deny advisories ok.

crates/codegen/kigi-shell/src/session/storage/jsonl/mod.rs

@@ -616,7 +616,7 @@ fn transform_session_id_in_update(
 /// 2. Truncates at the last complete turn boundary. A complete turn runs
 ///    `User → Assistant → (matching ToolResults)`, possibly across multiple
 ///    Assistant/ToolResult cycles, with `Reasoning` siblings interleaved
-///    throughout (real grok-build turns emit `[reasoning, assistant, tool
+///    throughout (real kigi turns emit `[reasoning, assistant, tool
 ///    results, reasoning, assistant, ...]`). The scan treats everything
 ///    except `Assistant` as transparent and only advances the boundary when an
 ///    Assistant closes every tool call it made, so it survives reasoning

crates/codegen/kigi-shell/src/session/storage/jsonl/tests.rs

@@ -121,7 +121,7 @@ async fn test_jsonl_round_trip() {
         .unwrap();
     let plan_state = create_test_plan_state();
     adapter.write_plan_state(&info, &plan_state).await.unwrap();
-    let new_model = acp::ModelId::new("grok-4.3");
+    let new_model = acp::ModelId::new("kigi-4.3");
     adapter.update_current_model(&info, &new_model).await.unwrap();
     let loaded = adapter.load_session(&info).await.unwrap();
     assert_eq!(loaded.summary.info.id, info.id);
@@ -456,12 +456,12 @@ async fn test_subagent_notifications_round_trip() {
         .len()
     );
     let spawned_json: serde_json::Value = serde_json::from_str(lines[0]).unwrap();
-    assert_eq!(spawned_json["method"], "_x.ai/session/update");
+    assert_eq!(spawned_json["method"], "_kigi/session/update");
     let spawned_update = &spawned_json["params"]["update"];
     assert_eq!(spawned_update["sessionUpdate"], "subagent_spawned");
     assert_eq!(spawned_update["subagent_id"], "child-001");
     let finished_json: serde_json::Value = serde_json::from_str(lines[1]).unwrap();
-    assert_eq!(finished_json["method"], "_x.ai/session/update");
+    assert_eq!(finished_json["method"], "_kigi/session/update");
     let finished_update = &finished_json["params"]["update"];
     assert_eq!(finished_update["sessionUpdate"], "subagent_finished");
     assert_eq!(finished_update["tool_calls"], 5);
@@ -742,13 +742,13 @@ async fn test_copy_session_data_with_model_override() {
     };
     let options = CopySessionOptions {
         parent_session_id: Some("source-model-test".to_string()),
-        new_model_id: Some("grok-3".to_string()),
+        new_model_id: Some("kigi-3".to_string()),
         target_prompt_index: None,
         ..Default::default()
     };
     adapter.copy_session_data(&source_info, &target_info, options).await.unwrap();
     let loaded = adapter.load_session(&target_info).await.unwrap();
-    assert_eq!(loaded.summary.current_model_id.0.as_ref(), "grok-3");
+    assert_eq!(loaded.summary.current_model_id.0.as_ref(), "kigi-3");
     assert_eq!(loaded.summary.parent_session_id, Some("source-model-test".to_string()));
 }
 #[tokio::test]
@@ -1108,8 +1108,8 @@ async fn test_append_feedback_creates_file_and_persists() {
             rating_value: Some(1),
             feedback_text: None,
             feedback_categories: vec![],
-            model_id: Some("grok-3-fast".into()),
-            resolved_model_id: Some("grok-4.5".into()),
+            model_id: Some("kigi-3-fast".into()),
+            resolved_model_id: Some("kigi-4.5".into()),
             model_fingerprint: None,
             context_type: None,
             request_id: None,
@@ -1163,7 +1163,7 @@ async fn test_copy_session_data_copies_tool_state() {
         .await
         .unwrap();
     let tool_state_json = serde_json::json!(
-        { "state" : { "grok_build.TodoState" : { "todos" : [] } } }
+        { "state" : { "kigi.TodoState" : { "todos" : [] } } }
     );
     let source_dir = adapter.session_dir(&source_info);
     std::fs::write(
@@ -2250,7 +2250,7 @@ fn load_lines(lines: &[&str]) -> Vec<ConversationItem> {
 }
 /// Real-shape legacy fixture from a web-search session.
 /// The assistant carries `reasoning: { text, encrypted, id }` inline —
-/// the legacy grok-build / Opus / chat-completions shape.
+/// the legacy kigi / Opus / chat-completions shape.
 /// BackendToolCall sits as its own sibling line (it was already a
 /// sibling variant in the legacy shape).
 #[test]
@@ -2260,7 +2260,7 @@ fn read_chat_history_upgrades_legacy_singular_reasoning_to_sibling() {
             r#"{"type":"system","content":"You are helpful."}"#,
             r#"{"type":"user","content":[{"type":"text","text":"cats and dogs"}]}"#,
             r#"{"type":"backend_tool_call","kind":{"tool_type":"web_search","id":"ws_legacy_1","status":"completed","action":{"type":"search","query":"cats and dogs","sources":[]}}}"#,
-            r#"{"type":"assistant","content":"results...","reasoning":{"text":"the results are about cats","encrypted":"enc-blob","id":"rs_legacy"},"model_id":"grok-build"}"#,
+            r#"{"type":"assistant","content":"results...","reasoning":{"text":"the results are about cats","encrypted":"enc-blob","id":"rs_legacy"},"model_id":"kigi"}"#,
         ],
     );
     assert_eq!(
@@ -2336,11 +2336,11 @@ fn read_chat_history_handles_hybrid_legacy_and_post_pr_lines() {
             r#"{"type":"system","content":"sys"}"#,
             r#"{"type":"user","content":[{"type":"text","text":"q1"}]}"#,
             r#"{"type":"backend_tool_call","kind":{"tool_type":"web_search","id":"ws_legacy_1","status":"completed","action":{"type":"search","query":"q1","sources":[]}}}"#,
-            r#"{"type":"assistant","content":"a1","reasoning":{"text":"legacy thinking","encrypted":"enc","id":"rs_legacy"},"model_id":"grok-build"}"#,
+            r#"{"type":"assistant","content":"a1","reasoning":{"text":"legacy thinking","encrypted":"enc","id":"rs_legacy"},"model_id":"kigi"}"#,
             r#"{"type":"user","content":[{"type":"text","text":"q2"}]}"#,
             r#"{"type":"reasoning","id":"rs_postpr","summary":[{"type":"summary_text","text":"new thinking"}]}"#,
             r#"{"type":"backend_tool_call","kind":{"tool_type":"web_search","id":"ws_postpr","status":"completed","action":{"type":"search","query":"q2","sources":[]}}}"#,
-            r#"{"type":"assistant","content":"a2","model_id":"grok-build"}"#,
+            r#"{"type":"assistant","content":"a2","model_id":"kigi"}"#,
         ],
     );
     let kinds: Vec<&'static str> = items
@@ -2381,7 +2381,7 @@ fn read_chat_history_handles_hybrid_legacy_and_post_pr_lines() {
     };
     assert_eq!(legacy_assistant.content.as_ref(), "a1");
     assert_eq!(
-        legacy_assistant.model_id.as_deref(), Some("grok-build"),
+        legacy_assistant.model_id.as_deref(), Some("kigi"),
         "model_id preserved across the upgrade"
     );
     let ConversationItem::Reasoning(reconstructed) = &items[3] else {
@@ -2402,7 +2402,7 @@ fn read_chat_history_is_idempotent_on_post_pr_sessions() {
             r#"{"type":"system","content":"sys"}"#,
             r#"{"type":"user","content":[{"type":"text","text":"q"}]}"#,
             r#"{"type":"reasoning","id":"rs_x","summary":[{"type":"summary_text","text":"thought"}]}"#,
-            r#"{"type":"assistant","content":"a","model_id":"grok-build"}"#,
+            r#"{"type":"assistant","content":"a","model_id":"kigi"}"#,
         ],
     );
     let kinds: Vec<&'static str> = items
@@ -2516,7 +2516,7 @@ fn read_chat_history_skips_merged_line_from_interrupted_append() {
     let good_1 = r#"{"type":"user","content":[{"type":"text","text":"kept"}]}"#;
     let partial = r#"{"type":"assistant","content":"cut mid-wri"#;
     let merged_onto = r#"{"type":"user","content":[{"type":"text","text":"lost"}]}"#;
-    let good_2 = r#"{"type":"assistant","content":"after","model_id":"grok-build"}"#;
+    let good_2 = r#"{"type":"assistant","content":"after","model_id":"kigi"}"#;
     let raw = format!("{good_1}\n{partial}{merged_onto}\n{good_2}\n");
     let temp_dir = TempDir::new().unwrap();
     let (_, _, items) = load_raw_chat(&temp_dir, raw.as_bytes());