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/common/kigi-tool-runtime/tests/tool_blocking.rs

@@ -0,0 +1,174 @@
+//! Default `Tool::execute` wrapping a blocking `Tool::run`.
+
+use futures::StreamExt;
+use schemars::JsonSchema;
+use serde::{Deserialize, Serialize};
+
+use kigi_tool_protocol::ToolId;
+use kigi_tool_runtime::{
+    Tool, ToolCallContext, ToolError, ToolErrorKind, ToolOutput, ToolStreamItem,
+};
+use kigi_tool_types::ToolDescription;
+
+#[derive(Debug, Deserialize, Serialize, JsonSchema)]
+struct EchoArgs {
+    text: String,
+}
+
+#[derive(Debug, Serialize, PartialEq)]
+struct EchoOutput {
+    text: String,
+}
+
+impl ToolOutput for EchoOutput {}
+struct BlockingOk;
+
+impl Tool for BlockingOk {
+    type Args = EchoArgs;
+    type Output = EchoOutput;
+
+    fn id(&self) -> ToolId {
+        ToolId::new("blocking_ok").unwrap()
+    }
+
+    fn description(&self, _ctx: &::kigi_tool_runtime::ListToolsContext) -> ToolDescription {
+        ToolDescription::new("blocking_ok", "ok")
+    }
+
+    async fn run(
+        &self,
+        _ctx: ToolCallContext,
+        args: Self::Args,
+    ) -> Result<Self::Output, ToolError> {
+        Ok(EchoOutput { text: args.text })
+    }
+}
+
+struct BlockingErr;
+
+impl Tool for BlockingErr {
+    type Args = EchoArgs;
+    type Output = EchoOutput;
+
+    fn id(&self) -> ToolId {
+        ToolId::new("blocking_err").unwrap()
+    }
+
+    fn description(&self, _ctx: &::kigi_tool_runtime::ListToolsContext) -> ToolDescription {
+        ToolDescription::new("blocking_err", "err")
+    }
+
+    async fn run(
+        &self,
+        _ctx: ToolCallContext,
+        args: Self::Args,
+    ) -> Result<Self::Output, ToolError> {
+        Err(ToolError::invalid_arguments(format!(
+            "rejected: {}",
+            args.text
+        )))
+    }
+}
+
+struct UnimplementedTool;
+
+impl Tool for UnimplementedTool {
+    type Args = EchoArgs;
+    type Output = EchoOutput;
+
+    fn id(&self) -> ToolId {
+        ToolId::new("unimplemented_tool").unwrap()
+    }
+
+    fn description(&self, _ctx: &::kigi_tool_runtime::ListToolsContext) -> ToolDescription {
+        ToolDescription::new("unimplemented_tool", "neither")
+    }
+}
+
+#[tokio::test]
+async fn blocking_ok_wraps_into_single_terminal() {
+    let tool = BlockingOk;
+    let mut stream = tool
+        .execute(
+            ToolCallContext::default(),
+            EchoArgs {
+                text: "hello".into(),
+            },
+        )
+        .await;
+    let first = stream.next().await.expect("expected one item");
+    assert!(first.is_terminal());
+    match first {
+        ToolStreamItem::Terminal(Ok(EchoOutput { text })) => assert_eq!(text, "hello"),
+        other => panic!("expected Terminal(Ok), got {other:?}"),
+    }
+    assert!(stream.next().await.is_none(), "stream should be exhausted");
+}
+
+#[tokio::test]
+async fn blocking_err_wraps_into_single_terminal() {
+    let tool = BlockingErr;
+    let mut stream = tool
+        .execute(
+            ToolCallContext::default(),
+            EchoArgs {
+                text: "rejected".into(),
+            },
+        )
+        .await;
+    let first = stream.next().await.expect("expected one item");
+    match first {
+        ToolStreamItem::Terminal(Err(ref err)) if err.kind == ToolErrorKind::InvalidArguments => {
+            assert_eq!(err.detail, "rejected: rejected");
+        }
+        other => panic!("expected Terminal(Err(InvalidArguments)), got {other:?}"),
+    }
+    assert!(stream.next().await.is_none());
+}
+
+#[tokio::test]
+async fn unimplemented_tool_returns_not_implemented_terminal() {
+    let tool = UnimplementedTool;
+    let item = tool
+        .execute(ToolCallContext::default(), EchoArgs { text: "x".into() })
+        .await
+        .next()
+        .await
+        .unwrap();
+    match item {
+        ToolStreamItem::Terminal(Err(ref err))
+            if err.kind == kigi_tool_runtime::error::ToolErrorKind::NotImplemented =>
+        {
+            assert!(
+                err.detail.contains("run") && err.detail.contains("execute"),
+                "detail should mention both methods, got: {}",
+                err.detail
+            );
+        }
+        other => panic!("expected Terminal(Err(NotImplemented)), got {other:?}"),
+    }
+}
+
+#[tokio::test]
+async fn run_takes_args_by_value() {
+    // The trait `run` consumes args; this would not compile if the
+    // signature accidentally borrowed.
+    let tool = BlockingOk;
+    let args = EchoArgs {
+        text: "consumed".into(),
+    };
+    let result = tool.run(ToolCallContext::default(), args).await.unwrap();
+    assert_eq!(result.text, "consumed");
+}
+
+#[tokio::test]
+async fn execute_default_drains_in_one_pass() {
+    // A stream from the default impl should always have exactly one item.
+    let tool = BlockingOk;
+    let count = tool
+        .execute(ToolCallContext::default(), EchoArgs { text: "n".into() })
+        .await
+        .count()
+        .await;
+    assert_eq!(count, 1);
+}