§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test could previously reach the real api.moonshot.cn), and the outdated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-update/src/auto_update.rs

@@ -1138,20 +1138,14 @@ async fn remove_stale_models_cache() {
     }
 }
 
-/// Remove stale grok-era links/binaries from `~/.kigi/bin/` left by
-/// installations that predate the Kigi distribution rewrite (`grok`,
-/// `agent`, `grok-pager`). `kigi` is the single managed entry point now.
+/// Remove stale links/binaries from `~/.kigi/bin/` left by installations
+/// that predate the single-binary distribution rewrite (`agent`). `kigi`
+/// is the single managed entry point now.
 async fn remove_legacy_links(bin_dir: &Path) {
-    for base in ["grok", "agent", "grok-pager"] {
-        let name = if cfg!(windows) {
-            format!("{base}.exe")
-        } else {
-            base.to_string()
-        };
-        let link = bin_dir.join(name);
-        if link.exists() || link.is_symlink() {
-            let _ = tokio::fs::remove_file(&link).await;
-        }
+    let name = if cfg!(windows) { "agent.exe" } else { "agent" };
+    let link = bin_dir.join(name);
+    if link.exists() || link.is_symlink() {
+        let _ = tokio::fs::remove_file(&link).await;
     }
 }
 

crates/codegen/kigi-update/tests/test_install_internal.rs

@@ -181,9 +181,9 @@ async fn install_alpha_channel_resolves_semver_max_from_release_list() {
 
 #[tokio::test]
 #[serial]
-async fn install_removes_legacy_grok_links() {
-    // Pre-rewrite installs left grok/agent/grok-pager links in bin/; the
-    // installer must retire them.
+async fn install_removes_legacy_links() {
+    // Pre-rewrite installs left `agent` links in bin/; the installer must
+    // retire them.
     let _ = test_home();
     reset_home();
     let server = MockServer::start().await;
@@ -192,21 +192,18 @@ async fn install_removes_legacy_grok_links() {
 
     let bin_dir = test_home().join("bin");
     std::fs::create_dir_all(&bin_dir).unwrap();
-    for legacy in ["grok", "agent", "grok-pager"] {
-        std::os::unix::fs::symlink("/tmp/fake-old-target", bin_dir.join(legacy)).unwrap();
-    }
+    let legacy = "agent";
+    std::os::unix::fs::symlink("/tmp/fake-old-target", bin_dir.join(legacy)).unwrap();
 
     install_internal_from_base(Some("0.1.181"), &cfg, &base(&server))
         .await
         .unwrap();
 
-    for legacy in ["grok", "agent", "grok-pager"] {
-        let link = bin_dir.join(legacy);
-        assert!(
-            !link.exists() && !link.is_symlink(),
-            "legacy {legacy} link should be removed"
-        );
-    }
+    let link = bin_dir.join(legacy);
+    assert!(
+        !link.exists() && !link.is_symlink(),
+        "legacy {legacy} link should be removed"
+    );
     assert!(bin_dir.join("kigi").is_symlink(), "kigi link installed");
 }
 

crates/codegen/kigi-update/tests/test_io.rs

@@ -135,7 +135,7 @@ async fn write_version_cache_records_recent_timestamp() {
 // writes the file directly so we can control the timestamp.
 // ─────────────────────────────────────────────────────────────────────────────
 
-/// Write a `GrokVersion`-shaped JSON file with an arbitrary timestamp.
+/// Write a `KigiVersion`-shaped JSON file with an arbitrary timestamp.
 fn write_cache_with_timestamp(version: &str, ts: time::OffsetDateTime) {
     let ts_str = ts
         .format(&time::format_description::well_known::Rfc3339)
@@ -154,7 +154,7 @@ fn write_cache_with_timestamp(version: &str, ts: time::OffsetDateTime) {
 /// Re-implement the cache-freshness check using the public API. We can't
 /// import the private `is_version_cache_fresh` directly, but we can verify
 /// its on-disk contract: file shape + freshness logic via the public
-/// `GrokVersion` JSON layout.
+/// `KigiVersion` JSON layout.
 async fn cache_is_fresh() -> bool {
     // Mirror the implementation: look at version.json under KIGI_SHARE_DIR,
     // parse, and check the TTL.
@@ -218,7 +218,7 @@ async fn version_cache_missing_file_is_not_fresh() {
 }
 
 // ─────────────────────────────────────────────────────────────────────────────
-// version.json wire format — the on-disk file is read by every grok launch.
+// version.json wire format — the on-disk file is read by every kigi launch.
 // ─────────────────────────────────────────────────────────────────────────────
 
 #[tokio::test]