M0: compilable skeleton — Kigi 0.1.0 fork surgery

Hard fork of xai-org/grok-build (Apache-2.0) re-targeted as Kigi, an
unofficial Kimi Code CLI community build.

Rename & identity
- 72 xai-*/xai-grok-* crates -> kigi-* (explicit: xai-grok-pager-bin ->
  kigi-bin [binary `kigi`], xai-grok-pager -> kigi-tui; rest mechanical);
  ptyctl, ptyctl-cli, third_party/ unchanged; proto package
  xai.grok.tools.v1 -> kigi.tools.v1
- Config home ~/.kigi (KIGI_SHARE_DIR override), env prefix GROK_* ->
  KIGI_*, `kigi --version` carries the unofficial-community-build notice
- clap identity, help text, startup banner, prompt templates rebranded
  (templates re-encrypted)

Deletions (PRD removal list #5/#6/#7/#9/#10)
- voice input (xai-grok-voice) and all TUI wiring
- telemetry: Mixpanel client, external OTel stream, Sentry, OTLP layers,
  trace/GCS/S3 upload queues (kigi-file-utils halved), workspace upload
  module & dc_log, heap-profile uploader, auth-diagnostics uploader,
  session-analytics halves of feedback; local zero-egress observability
  preserved in new kigi-log crate (unified log, --debug firehose,
  subsystem file logs, opt-in instrumentation)
- announcements (crate, remote-settings fields, TUI surfaces)
- plugin marketplace (crate, sources/browse/CTA/extensions-modal tab);
  direct plugin install/uninstall/update via kigi-agent git_install kept
- relay/gateway/assets endpoints and features (agent relay, headless
  relay transport, gateway bridge, LeaderEnvUrls); leader IPC socket now
  ~/.kigi/leader.sock + KIGI_LEADER_SOCKET, no ws-url derivation
- functional types rehomed instead of deleted: PermissionMode ->
  kigi-config-types, McpInitStrategy -> kigi-mcp, PrCreationSource ->
  session signals, TerminalDiagnostics -> kigi-pager-render, agent_id ->
  shell util

Endpoints
- kigi-env rewritten: single production KigiEndpoints {coding_api_base_url
  https://api.kimi.com/coding/v1 (KIGI_CODE_BASE_URL), oauth_host
  https://auth.kimi.com (KIGI_OAUTH_HOST), update_base_url (GitHub
  Releases API), upgrade_page_url}; GrokBuildEnvironment enum deleted

Toolchain & workspace hygiene
- Rust 1.97.0 pinned; edition 2024; full cargo update; git2 hoisted to
  workspace at 0.21 (Option->Result API migration), quick-xml 0.41
- Root Cargo.toml hand-maintained (PRD §8.1): version 0.1.0 inherited by
  all members, members sorted, unused deps pruned
- cargo-deny advisories gate (deny.toml with documented transitive
  exceptions); CI workflow (check/clippy/fmt/deny/test, macOS+Linux)
- cross-crate test seams re-gated behind `test-support` cargo feature;
  insta snapshot baselines renamed to the kigi_tui prefix
- clippy --workspace --all-targets: zero warnings; fmt clean

Fixes surfaced by the port
- updater probe/installer divergence (bin/kigi vs bin/grok symlink set)
- idle model-metadata refresh dead under KIGI_CODE_BASE_URL override
  (new is_effective_coding_endpoint_url, loopback+override aware)
- macOS symlinked-TMPDIR fixture canonicalization (foreign_sessions,
  fast-worktree); RSS measurement tests serialized via serial_test

Docs & legal (Apache §4)
- NOTICE added (upstream attribution + change statement); THIRD-PARTY
  notices sustained; kigi-tools ported-code notices extended; README,
  CONTRIBUTING, SECURITY, AGENTS.md rewritten

Out of scope for M0 (tracked): Kimi auth/inference (M1), search/fetch,
command parity, config import (M2), Computer Hub excision & final
brand-token sweep (M2), distribution & self-update rewrite (M3).

crates/codegen/kigi-shell/tests/test_summary_reasoning_effort.rs

@@ -0,0 +1,116 @@
+//! summary.json reasoning-effort persistence tests.
+//!
+//! Regression tests for "what effort was this session run on?": a fresh
+//! session must record its resolved `reasoning_effort` in `summary.json` at
+//! creation — not only after an explicit model/effort switch (the old
+//! behavior, which left the field absent for sessions that never switched).
+//!
+//! Each test spawns a real `grok agent stdio` process against a mock
+//! inference server and asserts on the persisted `summary.json`.
+//!
+//! Run locally:
+//! ```bash
+//! cargo test -p kigi-shell --test test_summary_reasoning_effort -- --ignored
+//! ```
+
+use std::future::Future;
+
+use kigi_test_support::*;
+
+async fn with_local_set<F, Fut>(f: F)
+where
+    F: FnOnce() -> Fut,
+    Fut: Future<Output = ()>,
+{
+    tokio::task::LocalSet::new().run_until(f()).await;
+}
+
+/// Find `summary.json` for `session_id` under `<home>/.kigi/sessions/` and
+/// parse it. The sessions tree is `<encoded-cwd>/<session-id>/summary.json`;
+/// matching on the directory name avoids re-implementing the cwd encoding.
+fn read_summary(home: &std::path::Path, session_id: &str) -> serde_json::Value {
+    let sessions_root = home.join(".kigi").join("sessions");
+    let cwd_dirs = std::fs::read_dir(&sessions_root)
+        .unwrap_or_else(|e| panic!("no sessions dir at {}: {e}", sessions_root.display()));
+    for cwd_dir in cwd_dirs.flatten() {
+        let candidate = cwd_dir.path().join(session_id).join("summary.json");
+        if candidate.is_file() {
+            let raw = std::fs::read_to_string(&candidate).expect("read summary.json");
+            return serde_json::from_str(&raw).expect("parse summary.json");
+        }
+    }
+    panic!(
+        "summary.json for session {session_id} not found under {}",
+        sessions_root.display()
+    );
+}
+
+/// A fresh session on a model with a configured reasoning effort must persist
+/// that effort in `summary.json` without any model/effort switch.
+#[tokio::test]
+#[ignore] // requires pre-built binary
+async fn test_fresh_session_persists_reasoning_effort() {
+    with_local_set(|| async {
+        let server = MockInferenceServer::start()
+            .await
+            .expect("start mock server");
+        let workdir = git_workdir();
+
+        // Configure the mock catalog's model with an explicit effort via the
+        // user config override (the same path a remote settings catalog entry or
+        // `--effort` would populate).
+        let home = tempfile::TempDir::new().expect("create temp home");
+        let grok_dir = home.path().join(".kigi");
+        std::fs::create_dir_all(&grok_dir).expect("create .kigi dir");
+        std::fs::write(
+            grok_dir.join("config.toml"),
+            r#"
+[model.test-model]
+supports_reasoning_effort = true
+reasoning_effort = "high"
+"#,
+        )
+        .expect("write config.toml");
+
+        let client = GrokStdioClient::spawn_with_home(&server, workdir.path(), home).await;
+        client.initialize_with_timeout().await;
+        let session_id = client.create_session_with_timeout(workdir.path()).await;
+        let result = client.prompt_with_timeout(&session_id, "say hello").await;
+        assert!(result.is_ok(), "prompt failed: {:?}", result.err());
+
+        let summary = read_summary(client.home_path(), &session_id.0);
+        assert_eq!(
+            summary.get("reasoning_effort").and_then(|v| v.as_str()),
+            Some("high"),
+            "fresh session must record its effort in summary.json; got: {summary}"
+        );
+    })
+    .await;
+}
+
+/// A fresh session on a model with no configured effort must not invent one:
+/// `summary.json` omits the field (the model uses its server-side default).
+#[tokio::test]
+#[ignore] // requires pre-built binary
+async fn test_fresh_session_without_effort_omits_field() {
+    with_local_set(|| async {
+        let server = MockInferenceServer::start()
+            .await
+            .expect("start mock server");
+        let workdir = git_workdir();
+        let client = GrokStdioClient::spawn(&server, workdir.path()).await;
+
+        client.initialize_with_timeout().await;
+        let session_id = client.create_session_with_timeout(workdir.path()).await;
+        let result = client.prompt_with_timeout(&session_id, "say hello").await;
+        assert!(result.is_ok(), "prompt failed: {:?}", result.err());
+
+        let summary = read_summary(client.home_path(), &session_id.0);
+        assert_eq!(
+            summary.get("reasoning_effort"),
+            None,
+            "session without a configured effort must omit the field; got: {summary}"
+        );
+    })
+    .await;
+}