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-tui/src/trace_cmd.rs

@@ -0,0 +1,225 @@
+use std::path::{Path, PathBuf};
+
+use anyhow::{Context, Result};
+use kigi_shell::agent::config::Config as AgentConfig;
+use kigi_shell::util::kigi_home::kigi_home;
+
+#[derive(Debug, clap::Args, Clone)]
+pub struct TraceArgs {
+    /// Session ID to export
+    pub session_id: String,
+    /// Output path (default: $KIGI_SHARE_DIR/trace-exports/<session-id>.tar.gz)
+    #[arg(short, long)]
+    pub output: Option<PathBuf>,
+    /// Emit machine-readable JSON output
+    #[arg(long)]
+    pub json: bool,
+}
+
+#[derive(serde::Serialize)]
+struct TraceResult {
+    session_id: String,
+    status: &'static str,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    local_path: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    error: Option<String>,
+}
+
+pub async fn run(args: TraceArgs, _agent_config: &AgentConfig) -> Result<()> {
+    run_export(&args.session_id, args.output.as_deref(), args.json).await
+}
+
+// ---------------------------------------------------------------------------
+// Archive construction
+// ---------------------------------------------------------------------------
+
+pub fn build_session_tar(session_dir: &Path, session_id: &str) -> Result<Vec<u8>> {
+    use flate2::Compression;
+    use flate2::write::GzEncoder;
+
+    tracing::info!(
+        session_id = %session_id,
+        session_dir = %session_dir.display(),
+        "trace_cmd: building session tar.gz archive"
+    );
+
+    let mut archive_data = Vec::new();
+    let mut file_count: u32 = 0;
+    {
+        let encoder = GzEncoder::new(&mut archive_data, Compression::default());
+        let mut archive = tar::Builder::new(encoder);
+
+        file_count += add_directory_to_tar(&mut archive, session_dir, session_id)?;
+
+        let metadata = ExportMetadata {
+            session_id: session_id.to_owned(),
+            grok_version: env!("VERSION_WITH_COMMIT").to_owned(),
+            os: std::env::consts::OS.to_owned(),
+            arch: std::env::consts::ARCH.to_owned(),
+            exported_at: chrono::Utc::now().to_rfc3339(),
+        };
+        let meta_bytes = serde_json::to_vec_pretty(&metadata)?;
+        append_bytes(
+            &mut archive,
+            &format!("{session_id}/export_metadata.json"),
+            &meta_bytes,
+        );
+        file_count += 1;
+
+        archive
+            .into_inner()
+            .and_then(|encoder| encoder.finish())
+            .context("Failed to finalize tar.gz archive")?;
+    }
+
+    tracing::info!(
+        session_id = %session_id,
+        file_count,
+        archive_bytes = archive_data.len(),
+        "trace_cmd: archive built"
+    );
+
+    Ok(archive_data)
+}
+
+#[derive(serde::Serialize)]
+struct ExportMetadata {
+    session_id: String,
+    grok_version: String,
+    os: String,
+    arch: String,
+    exported_at: String,
+}
+
+fn append_bytes<W: std::io::Write>(archive: &mut tar::Builder<W>, path: &str, data: &[u8]) {
+    let mut header = tar::Header::new_gnu();
+    header.set_size(data.len() as u64);
+    header.set_mode(0o644);
+    set_mtime(&mut header);
+    if let Err(e) = archive.append_data(&mut header, path, data) {
+        tracing::warn!(error = %e, "trace_cmd: failed to add file to archive");
+        eprintln!("  Warning: failed to add {path}: {e}");
+    }
+}
+
+fn set_mtime(header: &mut tar::Header) {
+    header.set_mtime(
+        std::time::SystemTime::now()
+            .duration_since(std::time::UNIX_EPOCH)
+            .unwrap_or_default()
+            .as_secs(),
+    );
+}
+
+/// Returns the number of files added.
+fn add_directory_to_tar<W: std::io::Write>(
+    archive: &mut tar::Builder<W>,
+    dir: &Path,
+    prefix: &str,
+) -> Result<u32> {
+    let entries =
+        std::fs::read_dir(dir).with_context(|| format!("Failed to read {}", dir.display()))?;
+
+    let mut count: u32 = 0;
+    for entry in entries.flatten() {
+        let path = entry.path();
+        let name = entry.file_name();
+        let name_str = name.to_string_lossy();
+        let archive_path = format!("{prefix}/{name_str}");
+
+        if path.is_dir() {
+            count += add_directory_to_tar(archive, &path, &archive_path)?;
+        } else if path.is_file() {
+            match std::fs::read(&path) {
+                Ok(data) => {
+                    append_bytes(archive, &archive_path, &data);
+                    count += 1;
+                }
+                Err(e) => {
+                    tracing::warn!(
+                        path = %path.display(),
+                        error = %e,
+                        "trace_cmd: failed to read file for archive"
+                    );
+                    eprintln!("  Warning: failed to read {}: {}", path.display(), e);
+                }
+            }
+        }
+    }
+
+    Ok(count)
+}
+
+// ---------------------------------------------------------------------------
+// Local export
+// ---------------------------------------------------------------------------
+
+pub(crate) fn find_session_dir(session_id: &str) -> Result<PathBuf> {
+    kigi_shell::session::persistence::find_session_dir_by_id(session_id).with_context(|| {
+        format!(
+            "Session '{session_id}' not found under {}",
+            crate::util::display_user_grok_path("sessions")
+        )
+    })
+}
+
+pub fn trace_exports_dir() -> PathBuf {
+    kigi_home().join("trace-exports")
+}
+
+/// Creates parent directory if needed.
+pub fn save_local_bundle(
+    archive: &[u8],
+    session_id: &str,
+    output: Option<&Path>,
+) -> Result<PathBuf> {
+    let output_path = match output {
+        Some(p) => p.to_path_buf(),
+        None => trace_exports_dir().join(format!("{session_id}.tar.gz")),
+    };
+
+    if let Some(parent) = output_path.parent() {
+        std::fs::create_dir_all(parent)
+            .with_context(|| format!("Failed to create {}", parent.display()))?;
+    }
+
+    std::fs::write(&output_path, archive)
+        .with_context(|| format!("Failed to write {}", output_path.display()))?;
+
+    tracing::info!(
+        session_id = %session_id,
+        path = %output_path.display(),
+        size_bytes = archive.len(),
+        "trace_cmd: local bundle saved"
+    );
+
+    Ok(output_path)
+}
+
+async fn run_export(session_id: &str, output: Option<&Path>, json: bool) -> Result<()> {
+    let session_dir = find_session_dir(session_id)?;
+    if !json {
+        eprintln!("Found session at: {}", session_dir.display());
+        eprintln!("Building session trace archive...");
+    }
+
+    let archive = build_session_tar(&session_dir, session_id)?;
+    let output_path = save_local_bundle(&archive, session_id, output)?;
+
+    if json {
+        let result = TraceResult {
+            session_id: session_id.to_owned(),
+            status: "exported",
+            local_path: Some(output_path.display().to_string()),
+            error: None,
+        };
+        println!("{}", serde_json::to_string(&result)?);
+    } else {
+        let size_kb = archive.len() / 1024;
+        eprintln!("Session trace exported ({size_kb} KB):");
+        eprintln!("  {}", output_path.display());
+        println!("{}", output_path.display());
+    }
+    Ok(())
+}