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-markdown/src/style.rs

@@ -0,0 +1,303 @@
+//! Markdown styling types.
+//!
+//! This module provides the `MarkdownStyle` struct which defines colors and
+//! effects for all markdown elements.
+
+use anstyle::{Effects, Style};
+
+use crate::colors::adapt_style;
+
+/// Table border characters for rendering tables in pretty mode.
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+pub struct TableBorders {
+    chars: [char; 11],
+}
+
+impl TableBorders {
+    const H: usize = 0;
+    const V: usize = 1;
+    const TL: usize = 2;
+    const TR: usize = 3;
+    const BL: usize = 4;
+    const BR: usize = 5;
+    const T_T: usize = 6;
+    const T_B: usize = 7;
+    const T_L: usize = 8;
+    const T_R: usize = 9;
+    const X: usize = 10;
+
+    pub const BOX: Self = Self {
+        chars: ['─', '│', '┌', '┐', '└', '┘', '┬', '┴', '├', '┤', '┼'],
+    };
+
+    pub const ASCII: Self = Self {
+        chars: ['-', '|', '+', '+', '+', '+', '+', '+', '+', '+', '+'],
+    };
+
+    pub const DOUBLE: Self = Self {
+        chars: ['═', '║', '╔', '╗', '╚', '╝', '╦', '╩', '╠', '╣', '╬'],
+    };
+
+    pub const fn new(chars: [char; 11]) -> Self {
+        Self { chars }
+    }
+
+    // Short names (used in table formatting)
+    pub const fn h(&self) -> char {
+        self.chars[Self::H]
+    }
+    pub const fn v(&self) -> char {
+        self.chars[Self::V]
+    }
+    pub const fn c_tl(&self) -> char {
+        self.chars[Self::TL]
+    }
+    pub const fn c_tr(&self) -> char {
+        self.chars[Self::TR]
+    }
+    pub const fn c_bl(&self) -> char {
+        self.chars[Self::BL]
+    }
+    pub const fn c_br(&self) -> char {
+        self.chars[Self::BR]
+    }
+    pub const fn t_t(&self) -> char {
+        self.chars[Self::T_T]
+    }
+    pub const fn t_b(&self) -> char {
+        self.chars[Self::T_B]
+    }
+    pub const fn t_l(&self) -> char {
+        self.chars[Self::T_L]
+    }
+    pub const fn t_r(&self) -> char {
+        self.chars[Self::T_R]
+    }
+    pub const fn x(&self) -> char {
+        self.chars[Self::X]
+    }
+
+    // Long names (for readability)
+    pub const fn horizontal(&self) -> char {
+        self.chars[Self::H]
+    }
+    pub const fn vertical(&self) -> char {
+        self.chars[Self::V]
+    }
+    pub const fn top_left(&self) -> char {
+        self.chars[Self::TL]
+    }
+    pub const fn top_right(&self) -> char {
+        self.chars[Self::TR]
+    }
+    pub const fn bottom_left(&self) -> char {
+        self.chars[Self::BL]
+    }
+    pub const fn bottom_right(&self) -> char {
+        self.chars[Self::BR]
+    }
+    pub const fn t_top(&self) -> char {
+        self.chars[Self::T_T]
+    }
+    pub const fn t_bottom(&self) -> char {
+        self.chars[Self::T_B]
+    }
+    pub const fn t_left(&self) -> char {
+        self.chars[Self::T_L]
+    }
+    pub const fn t_right(&self) -> char {
+        self.chars[Self::T_R]
+    }
+    pub const fn cross(&self) -> char {
+        self.chars[Self::X]
+    }
+}
+
+impl Default for TableBorders {
+    fn default() -> Self {
+        Self::BOX
+    }
+}
+
+/// Style configuration for markdown rendering.
+///
+/// Each field controls the styling for a specific markdown element.
+/// The `_inner` variants are applied to the content, while `_outer` variants
+/// are applied to the syntax markers (which are hidden in pretty mode).
+#[derive(Copy, Clone, Default, Debug, PartialEq, Eq, Hash)]
+pub struct MarkdownStyle {
+    pub heading_inner: [Style; 6],
+    pub heading_outer: [Style; 6],
+    pub strong_inner: Style,
+    pub strong_outer: Style,
+    pub emphasis_inner: Style,
+    pub emphasis_outer: Style,
+    pub strikethrough_inner: Style,
+    pub strikethrough_outer: Style,
+    pub inline_code_inner: Style,
+    pub inline_code_outer: Style,
+    pub blockquote_outer: Style,
+    pub task_checked: Style,
+    pub task_unchecked: Style,
+    pub list_item: Style,
+    pub rule: Style,
+    pub link_outer: Style,
+    pub link_text: Style,
+    pub link_url: Style,
+    pub link_title: Style,
+    pub code_outer: Style,
+    pub code_language: Style,
+    pub code_untagged: Style,
+    pub code_background: Style,
+    pub table_outer: Style,
+    /// Default foreground for plain body text (paragraphs with no formatting).
+    /// When set, the renderer applies this to text spans that would otherwise
+    /// inherit the terminal's default foreground.
+    pub text: Style,
+    /// Style for rendered LaTeX math (inline `$...$`/`\(...\)` content after
+    /// Unicode conversion, and display math block lines). In raw mode the
+    /// style applies to the unconverted TeX source.
+    pub math: Style,
+}
+
+impl MarkdownStyle {
+    /// Adapt all styles for the terminal's color capabilities.
+    ///
+    /// This downgrades RGB colors to 256-color or 16-color as needed.
+    pub fn adapt(self) -> Self {
+        Self {
+            heading_inner: [
+                adapt_style(self.heading_inner[0]),
+                adapt_style(self.heading_inner[1]),
+                adapt_style(self.heading_inner[2]),
+                adapt_style(self.heading_inner[3]),
+                adapt_style(self.heading_inner[4]),
+                adapt_style(self.heading_inner[5]),
+            ],
+            heading_outer: [
+                adapt_style(self.heading_outer[0]),
+                adapt_style(self.heading_outer[1]),
+                adapt_style(self.heading_outer[2]),
+                adapt_style(self.heading_outer[3]),
+                adapt_style(self.heading_outer[4]),
+                adapt_style(self.heading_outer[5]),
+            ],
+            strong_inner: adapt_style(self.strong_inner),
+            strong_outer: adapt_style(self.strong_outer),
+            emphasis_inner: adapt_style(self.emphasis_inner),
+            emphasis_outer: adapt_style(self.emphasis_outer),
+            strikethrough_inner: adapt_style(self.strikethrough_inner),
+            strikethrough_outer: adapt_style(self.strikethrough_outer),
+            inline_code_inner: adapt_style(self.inline_code_inner),
+            inline_code_outer: adapt_style(self.inline_code_outer),
+            blockquote_outer: adapt_style(self.blockquote_outer),
+            task_checked: adapt_style(self.task_checked),
+            task_unchecked: adapt_style(self.task_unchecked),
+            list_item: adapt_style(self.list_item),
+            rule: adapt_style(self.rule),
+            link_outer: adapt_style(self.link_outer),
+            link_text: adapt_style(self.link_text),
+            link_url: adapt_style(self.link_url),
+            link_title: adapt_style(self.link_title),
+            code_outer: adapt_style(self.code_outer),
+            code_language: adapt_style(self.code_language),
+            code_untagged: adapt_style(self.code_untagged),
+            code_background: adapt_style(self.code_background),
+            table_outer: adapt_style(self.table_outer),
+            text: adapt_style(self.text),
+            math: adapt_style(self.math),
+        }
+    }
+}
+
+/// Check if ALL active styles have HIDDEN effect.
+/// Used in pretty mode to determine if text should be skipped.
+pub(crate) fn all_hidden(styles: impl IntoIterator<Item = Option<Style>>) -> bool {
+    let mut has_any = false;
+    let mut all_are_hidden = true;
+
+    for style in styles {
+        has_any = true;
+        match style {
+            Some(s) if s.get_effects().contains(Effects::HIDDEN) => {}
+            _ => {
+                all_are_hidden = false;
+            }
+        }
+    }
+
+    has_any && all_are_hidden
+}
+
+/// Merge multiple styles into one for rendering.
+/// Strips HIDDEN from final output - it's a semantic marker, not a visual style.
+pub(crate) fn merge_styles(styles: impl IntoIterator<Item = Option<Style>>) -> Style {
+    let mut out = Style::new();
+    let mut prev = Style::new();
+    for style in styles {
+        if out.get_effects().contains(Effects::HIDDEN) {
+            out = prev;
+        } else {
+            prev = out;
+        }
+        let Some(style) = style else {
+            continue;
+        };
+        if !style.get_effects().is_plain() {
+            out = out.effects(out.get_effects() | style.get_effects());
+        }
+        if style.get_effects().contains(Effects::DIMMED) {
+            out = out.effects(out.get_effects().remove(Effects::BOLD));
+        }
+        if style.get_effects().contains(Effects::BOLD) {
+            out = out.effects(out.get_effects().remove(Effects::DIMMED));
+        }
+        if let Some(color) = style.get_fg_color() {
+            out = out.fg_color(Some(color));
+        }
+        if let Some(color) = style.get_bg_color() {
+            out = out.bg_color(Some(color));
+        }
+        if let Some(color) = style.get_underline_color() {
+            out = out.underline_color(Some(color));
+        }
+    }
+    out.effects(out.get_effects().remove(Effects::HIDDEN))
+}
+
+// Simple default style for testing (no colors, just effects)
+#[cfg(any(test, fuzzing))]
+pub mod test_style {
+    use super::MarkdownStyle;
+    use anstyle::Style;
+
+    /// A minimal style for testing with no colors.
+    pub const STYLE: MarkdownStyle = MarkdownStyle {
+        heading_inner: [Style::new().bold(); 6],
+        heading_outer: [Style::new().dimmed().hidden(); 6],
+        strong_inner: Style::new().bold(),
+        strong_outer: Style::new().dimmed().hidden(),
+        emphasis_inner: Style::new().italic(),
+        emphasis_outer: Style::new().dimmed().hidden(),
+        strikethrough_inner: Style::new().strikethrough(),
+        strikethrough_outer: Style::new().dimmed().hidden(),
+        inline_code_inner: Style::new().bold(),
+        inline_code_outer: Style::new().dimmed().hidden(),
+        blockquote_outer: Style::new().dimmed(),
+        task_checked: Style::new(),
+        task_unchecked: Style::new().dimmed(),
+        list_item: Style::new().dimmed(),
+        rule: Style::new(),
+        link_outer: Style::new(),
+        link_text: Style::new().bold(),
+        link_url: Style::new().dimmed(),
+        link_title: Style::new(),
+        code_outer: Style::new().dimmed().hidden(),
+        code_language: Style::new().hidden(),
+        code_untagged: Style::new(),
+        code_background: Style::new(),
+        table_outer: Style::new().bold(),
+        text: Style::new(),
+        math: Style::new().italic(),
+    };
+}