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-sandbox/src/logging.rs

@@ -0,0 +1,105 @@
+//! Sandbox event logger.
+//!
+//! Records sandbox events (profile applied, violations, bypasses) for
+//! telemetry and debugging. Events are kept in memory and can be flushed
+//! to a JSONL file at `~/.kigi/sandbox-events.jsonl`.
+
+use std::path::PathBuf;
+use std::sync::Mutex;
+
+use crate::types::{SandboxEvent, SandboxEventType, SandboxMetrics};
+
+/// Logger that collects sandbox events and maintains violation counters.
+pub struct SandboxLogger {
+    events: Mutex<Vec<SandboxEvent>>,
+    metrics: SandboxMetrics,
+}
+
+impl SandboxLogger {
+    pub fn new() -> Self {
+        Self {
+            events: Mutex::new(Vec::new()),
+            metrics: SandboxMetrics::default(),
+        }
+    }
+
+    /// Record an event, updating metrics counters as appropriate.
+    pub fn log(&self, event: SandboxEvent) {
+        match &event.event_type {
+            SandboxEventType::FsViolation => self.metrics.inc_fs_violation(),
+            SandboxEventType::NetViolation => self.metrics.inc_net_violation(),
+            SandboxEventType::BypassGranted => self.metrics.inc_bypass_granted(),
+            SandboxEventType::BypassDenied => self.metrics.inc_bypass_denied(),
+            _ => {}
+        }
+
+        tracing::debug!(
+            event_type = ?event.event_type,
+            profile = %event.profile,
+            target = ?event.target,
+            operation = ?event.operation,
+            "sandbox event"
+        );
+
+        if let Ok(mut events) = self.events.lock() {
+            events.push(event);
+        }
+    }
+
+    /// Get a reference to the metrics counters.
+    pub fn metrics(&self) -> &SandboxMetrics {
+        &self.metrics
+    }
+
+    /// Take all accumulated events, draining the internal buffer.
+    pub fn take_events(&self) -> Vec<SandboxEvent> {
+        self.events
+            .lock()
+            .map(|mut events| std::mem::take(&mut *events))
+            .unwrap_or_default()
+    }
+
+    /// Flush accumulated events to the JSONL log file.
+    /// Each event is written as a single JSON line.
+    pub fn flush_to_disk(&self) -> anyhow::Result<()> {
+        let events = self.take_events();
+        if events.is_empty() {
+            return Ok(());
+        }
+
+        let log_path = Self::log_file_path();
+        if let Some(parent) = log_path.parent() {
+            std::fs::create_dir_all(parent)?;
+        }
+
+        use std::io::Write;
+        let mut file = std::fs::OpenOptions::new()
+            .create(true)
+            .append(true)
+            .open(&log_path)?;
+
+        for event in &events {
+            if let Ok(json) = serde_json::to_string(event) {
+                writeln!(file, "{}", json)?;
+            }
+        }
+
+        tracing::debug!(
+            path = %log_path.display(),
+            count = events.len(),
+            "flushed sandbox events to disk"
+        );
+
+        Ok(())
+    }
+
+    fn log_file_path() -> PathBuf {
+        kigi_config::kigi_home().join("sandbox-events.jsonl")
+    }
+}
+
+impl Default for SandboxLogger {
+    fn default() -> Self {
+        Self::new()
+    }
+}