§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test could previously reach the real api.moonshot.cn), and the outdated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-pager-minimal/Cargo.toml

@@ -24,7 +24,7 @@ kigi-tui = { path = "../kigi-tui" }
 # Rendering primitives (must match the pager's versions).
 ratatui = { workspace = true, features = ["crossterm", "unstable-widget-ref"] }
 crossterm = { workspace = true, features = ["event-stream", "bracketed-paste"] }
-# Transcript temp-file names (`grok-transcript-<uuid>.ansi`).
+# Transcript temp-file names (`kigi-transcript-<uuid>.ansi`).
 uuid = { workspace = true, features = ["v4"] }
 tracing = { workspace = true }
 

crates/codegen/kigi-pager-minimal/src/full_view.rs

@@ -133,7 +133,7 @@ fn finish_transcript(app: &mut AppView, id: kigi_tui::app::agent::AgentId, out:
         }
         return;
     }
-    let path = std::env::temp_dir().join(format!("grok-transcript-{}.ansi", uuid::Uuid::new_v4()));
+    let path = std::env::temp_dir().join(format!("kigi-transcript-{}.ansi", uuid::Uuid::new_v4()));
     match std::fs::write(&path, out) {
         Ok(()) => {
             app.pending_pager_path = Some(path);

crates/codegen/kigi-pager-minimal/src/lib.rs

@@ -1,4 +1,4 @@
-//! Minimal (scrollback-native) render mode — `grok --minimal`.
+//! Minimal (scrollback-native) render mode — `kigi --minimal`.
 //!
 //! In this mode finalized conversation blocks are printed once into the
 //! terminal's *native* scrollback (via `kigi_ratatui_inline::Terminal::insert_before`,

crates/codegen/kigi-pager-minimal/src/welcome.rs

@@ -72,7 +72,7 @@ pub fn maybe_commit_welcome(app: &mut AppView, terminal: &mut PagerTerminal) {
     let mut info: Vec<Line<'static>> = Vec::new();
     info.push(Line::from(vec![
         Span::styled(
-            "Grok Build",
+            "Kigi",
             Style::default()
                 .fg(theme.accent_user)
                 .add_modifier(Modifier::BOLD),