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/memory_cmd.rs

@@ -0,0 +1,132 @@
+use std::io::Write;
+use std::path::PathBuf;
+
+use anyhow::Result;
+use clap::Subcommand;
+use kigi_shell::session::memory::storage::MemoryStorage;
+
+#[derive(Debug, clap::Args, Clone)]
+pub struct MemoryArgs {
+    #[command(subcommand)]
+    pub command: MemoryCommand,
+}
+
+#[derive(Debug, Subcommand, Clone)]
+pub enum MemoryCommand {
+    /// Clear memory files (workspace by default)
+    Clear {
+        /// Clear workspace-scoped memory (MEMORY.md, sessions/, index.sqlite)
+        #[arg(long, group = "scope")]
+        workspace: bool,
+        /// Clear global MEMORY.md
+        #[arg(long, group = "scope")]
+        global: bool,
+        /// Clear both workspace and global memory
+        #[arg(long, group = "scope")]
+        all: bool,
+        /// Skip confirmation prompt
+        #[arg(long, short = 'y')]
+        yes: bool,
+    },
+}
+
+struct ClearTarget {
+    label: &'static str,
+    path: PathBuf,
+    clear: fn(&MemoryStorage) -> std::io::Result<bool>,
+}
+
+fn workspace_target(storage: &MemoryStorage) -> ClearTarget {
+    ClearTarget {
+        label: "workspace memory",
+        path: storage.workspace_dir().to_path_buf(),
+        clear: |s| s.clear_workspace(),
+    }
+}
+
+fn global_target(storage: &MemoryStorage) -> ClearTarget {
+    ClearTarget {
+        label: "global MEMORY.md",
+        path: storage.global_memory_file(),
+        clear: |s| s.clear_global(),
+    }
+}
+
+pub fn run(args: MemoryArgs) -> Result<()> {
+    match args.command {
+        MemoryCommand::Clear {
+            global, all, yes, ..
+        } => {
+            let cwd = std::env::current_dir().unwrap_or_else(|_| ".".into());
+            let storage = MemoryStorage::new(&cwd, None);
+
+            let targets = if all {
+                vec![workspace_target(&storage), global_target(&storage)]
+            } else if global {
+                vec![global_target(&storage)]
+            } else {
+                vec![workspace_target(&storage)]
+            };
+
+            run_clear(&storage, &targets, yes)
+        }
+    }
+}
+
+fn run_clear(storage: &MemoryStorage, targets: &[ClearTarget], skip_confirm: bool) -> Result<()> {
+    let existing: Vec<_> = targets.iter().filter(|t| t.path.exists()).collect();
+
+    if existing.is_empty() {
+        println!("Nothing to clear \u{2014} no memory files found.");
+        return Ok(());
+    }
+
+    println!("The following will be deleted:");
+    for t in &existing {
+        println!("  {}: {}", t.label, t.path.display());
+    }
+
+    if !skip_confirm {
+        print!("\nAre you sure? [y/N] ");
+        std::io::stdout().flush()?;
+
+        let mut input = String::new();
+        std::io::stdin().read_line(&mut input)?;
+        if !matches!(input.trim().to_ascii_lowercase().as_str(), "y" | "yes") {
+            println!("Cancelled.");
+            return Ok(());
+        }
+    }
+
+    let mut cleared = false;
+    let mut errors: Vec<String> = Vec::new();
+    for t in targets {
+        match (t.clear)(storage) {
+            Ok(true) => {
+                cleared = true;
+                println!("  Cleared: {}", t.label);
+            }
+            Ok(false) => {} // nothing to clear for this scope
+            Err(e) => {
+                errors.push(format!("{}: {e}", t.label));
+            }
+        }
+    }
+
+    if cleared && errors.is_empty() {
+        println!("Memory cleared.");
+    } else if cleared {
+        println!("Memory partially cleared. Errors:");
+        for e in &errors {
+            eprintln!("  {e}");
+        }
+    } else if !errors.is_empty() {
+        eprintln!("Failed to clear memory:");
+        for e in &errors {
+            eprintln!("  {e}");
+        }
+        return Err(anyhow::anyhow!("clear failed"));
+    }
+
+    Ok(())
+}