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//! The which-key leader menu (NvChad-style). After a leader key — `<space>` in
//! vim Normal mode, `Ctrl+K` in the standard keymap — a popup lists the available
//! key continuations; each subsequent key descends a small trie; a leaf runs its
//! command. Esc (or a key with no continuation) closes it.
//!
//! The leader map is a built-in default for now; a `[keys.leader]` config overlay
//! and which-key popups for the vim *operator* prefixes (`g…`, `d…`) are later
//! refinements — for P3b this is leader-only, and a binding is strictly a leaf
//! *or* a group, never both, which keeps the state machine a one-liner.
use std::collections::BTreeMap;
use std::sync::OnceLock;
#[derive(Debug)]
pub enum Leader {
/// A leaf: running `id` closes the menu. `label` is shown in the popup.
Cmd {
id: &'static str,
label: &'static str,
},
/// A submenu. `label` (e.g. `"+find"`) heads it in the popup.
Group {
label: &'static str,
children: BTreeMap<char, Leader>,
},
}
impl Leader {
pub fn label(&self) -> &'static str {
match self {
Leader::Cmd { label, .. } => label,
Leader::Group { label, .. } => label,
}
}
pub fn is_group(&self) -> bool {
matches!(self, Leader::Group { .. })
}
}
fn cmd(id: &'static str, label: &'static str) -> Leader {
Leader::Cmd { id, label }
}
fn group(label: &'static str, kids: Vec<(char, Leader)>) -> Leader {
Leader::Group {
label,
children: kids.into_iter().collect(),
}
}
/// 2026-06-21 multilang SEV-3 runners-npm-priority-no-disambiguation:
/// walk the leader trie and emit `(chord_path, command_id)` for
/// every leaf. The cheatsheet uses this to surface leader-chord
/// bindings so they don't show up as `(unbound)`. Leader prefix
/// is `<leader>` so a `<leader>Lct` binding for `cargo.test`
/// emits `("<leader>L c t", "cargo.test")`.
pub fn enumerate_leaves() -> Vec<(String, &'static str)> {
let mut out = Vec::new();
walk(root(), String::from("<leader>"), &mut out);
out
}
fn walk(node: &'static Leader, path: String, out: &mut Vec<(String, &'static str)>) {
match node {
Leader::Cmd { id, .. } => out.push((path, id)),
Leader::Group { children, .. } => {
for (ch, child) in children.iter() {
let next_path = if path == "<leader>" {
format!("<leader>{ch}")
} else {
format!("{path}{ch}")
};
walk(child, next_path, out);
}
}
}
}
/// The root of the leader trie (built once).
pub fn root() -> &'static Leader {
static ROOT: OnceLock<Leader> = OnceLock::new();
ROOT.get_or_init(|| {
group(
"<leader>",
vec![
(
'f',
group(
"+find",
vec![
('f', cmd("picker.files", "files")),
('b', cmd("picker.buffers", "buffers")),
// NvChad parity: `<leader>fg` = workspace
// grep. Bug-hunt seed #272 from 2026-06-07
// nvchad-user hunt — chord was missing.
('g', cmd("find.grep", "grep")),
],
),
),
(
'b',
group(
"+buffer",
vec![
('n', cmd("buffer.next", "next")),
('p', cmd("buffer.prev", "previous")),
('d', cmd("buffer.close", "delete")),
('r', cmd("buffer.reopen", "reopen closed")),
],
),
),
(
't',
group(
"+toggle",
vec![
('e', cmd("view.toggle_tree", "explorer")),
('r', cmd("view.toggle_right_panel", "right panel")),
(']', cmd("view.right_panel_next_tab", "right panel: next")),
('[', cmd("view.right_panel_prev_tab", "right panel: prev")),
// design-critic + claude-agents-power-user
// 2026-06-28: "evict" was unique vocabulary
// — every other surface (palette title,
// context menu, × tooltip) said "close".
// Aligned for whichkey/palette searchability.
(
'x',
cmd("view.right_panel_close_tab", "right panel: close tab"),
),
('k', cmd("editor.toggle_keymap", "vim ⇄ standard")),
('t', cmd("theme.pick", "theme…")),
('h', cmd("view.toggle_hidden", "hidden files (focused)")),
('H', cmd("view.toggle_hidden_all", "hidden files (all)")),
],
),
),
(
'g',
group(
"+git",
vec![
('d', cmd("git.diff_file", "diff file")),
('D', cmd("git.diff", "diff worktree")),
('A', cmd("git.diff_all", "diff all vs HEAD (multi-file)")),
('p', cmd("git.peek_change", "peek change at cursor")),
('b', cmd("git.blame_toggle", "blame toggle")),
('c', cmd("git.commit", "commit")),
('l', cmd("git.graph", "commit graph")),
('s', cmd("git.status_pane", "status / staging")),
('m', cmd("git.ai_commit", "ai (Claude) commit message")),
('M', cmd("git.ai_recompose", "ai rewrite HEAD msg")),
('x', cmd("git.codex_commit", "codex commit message")),
('o', cmd("git.checkout", "checkout branch")),
('n', cmd("git.new_branch", "new branch")),
('w', cmd("git.worktrees", "worktrees → shell")),
('S', cmd("git.stash", "stash (with optional msg)")),
('P', cmd("git.stash_pop", "stash pop")),
],
),
),
(
'h',
group(
"+http",
vec![
('s', cmd("http.send", "send request")),
('y', cmd("http.copy_curl", "copy as curl")),
('d', cmd("http.ai_debug", "ask Claude (debug)")),
(']', cmd("http.next_block", "next ### block")),
('[', cmd("http.prev_block", "previous ### block")),
],
),
),
(
'T',
group(
"+test",
vec![
('a', cmd("test.run_all", "run all")),
('f', cmd("test.run_file", "run this file")),
('t', cmd("test.run_at_cursor", "run test at cursor")),
('l', cmd("test.rerun_failed", "re-run last-failed")),
('h', cmd("test.heal", "heal failing test (Claude)")),
('w', cmd("flaky.show", "flaky/wobbly dashboard")),
],
),
),
// 2026-06-21 multilang SEV-3 runners-no-whichkey-group:
// language-specific runner family. Two-level prefix
// — `<leader>Lc` for cargo, `<leader>Ln` for npm,
// `<leader>Lp` for pytest, `<leader>Lg` for go. The
// generic `<leader>T` group (above) handles
// framework-agnostic test commands. `L` chosen to
// avoid the prior `<leader>r` accident — see comment
// below — and `R` (which read as redo). `L` reads
// as "language" + has no vim-canonical at root.
(
'L',
group(
"+lang/run",
vec![
(
'c',
group(
"+cargo",
vec![
('t', cmd("cargo.test", "cargo test")),
('b', cmd("cargo.build", "cargo build")),
('r', cmd("cargo.run", "cargo run")),
('c', cmd("cargo.check", "cargo check")),
('l', cmd("cargo.clippy", "cargo clippy")),
('f', cmd("cargo.fmt", "cargo fmt")),
],
),
),
(
'n',
group(
"+npm",
vec![
('t', cmd("npm.test", "npm test")),
('b', cmd("npm.build", "npm run build")),
('r', cmd("npm.run", "npm run dev")),
('s', cmd("npm.start", "npm start")),
('i', cmd("npm.install", "npm install")),
('l', cmd("npm.lint", "npm run lint")),
('x', cmd("npm.run_script", "run an npm script (prompt)")),
],
),
),
(
'p',
group(
"+pytest",
vec![
('t', cmd("pytest.run", "pytest")),
('l', cmd("pytest.failed", "pytest --lf")),
],
),
),
(
'g',
group(
"+go",
vec![
('t', cmd("go.test", "go test ./...")),
('b', cmd("go.build", "go build")),
('r', cmd("go.run", "go run .")),
('v', cmd("go.vet", "go vet ./...")),
('p', cmd("go.run_path", "go run <path> (prompt)")),
],
),
),
],
),
),
(
'P',
group(
"+pr",
vec![
(
'p',
cmd(
"pr.picker",
"PRs: cross-host picker (Enter URL / Tab pipeline)",
),
),
(
'r',
cmd("pr.refresh", "PRs: refresh cross-host cache (background)"),
),
],
),
),
(
'i',
group(
"+integrations",
vec![
(
'd',
cmd(
"integrations.show_details",
"detail pane (description / buttons / links)",
),
),
// 2026-08-03 — the ~20 forge.open_* chord bindings
// that lived here (bitbucket / github / gitlab /
// azdevops / codebuild / s3 / azure_blob /
// cloudwatch_logs / amplify / dynamodb / lambda /
// eventbridge / rds / ecs / ecr / cognito / sqs /
// sns) were dropped alongside the corresponding
// hardcoded palette commands in command.rs — the
// integration binaries they pointed at are all retired
// (ecosystem consolidated to mnml + mnml-integrations
// + mnml-tattle-tests). Anything a user installs
// through the marketplace now registers its OWN
// command via IntegrationManifest.commands + can
// bind its own chords via [keys.global] in user
// config or [[commands]].keys in the manifest.
//
// Also unwedges the previous 'd'/'C'/'E' collisions
// (integrations.show_details vs forge.open_dynamodb;
// tools.btop vs forge.open_ecs; integrations.toggle_enabled
// vs forge.open_ecr — each pair silently shadowed one
// side).
('h', cmd("tools.htop", "htop — interactive process viewer")),
(
'I',
cmd("tools.iftop", "iftop — interactive bandwidth monitor"),
),
('r', cmd("tools.btop", "btop — resource monitor")),
(
'p',
cmd("integrations.icon_picker", "browse Nerd Font glyphs"),
),
(
'E',
cmd("integrations.toggle_enabled", "enable/disable a chip"),
),
// 2026-08-03 — same removal as the block above.
// The datadog/buttondown/slack/teams/mandrill/
// docker/gmail/gcal/jira/cloudflare bindings all
// pointed at now-retired forge.open_* palette
// commands. Users install these via marketplace
// now (chord binding comes from manifest).
],
),
),
(
'a',
group(
"+ai/term",
vec![
('a', cmd("ai.ask", "ask claude…")),
('b', cmd("ai.toggle_backend", "toggle backend (cli ↔ api)")),
('d', cmd("ai.dashboard", "agents dashboard")),
('e', cmd("ai.explain", "explain selection")),
('f', cmd("ai.fix", "fix bugs")),
('r', cmd("ai.refactor", "refactor")),
('w', cmd("ai.write_tests", "write tests")),
('m', cmd("ai.session_view", "mirror session")),
('t', cmd("term.shell", "shell")),
('c', cmd("ai.claude_code", "claude code")),
('n', cmd("ai.claude_code_new", "new claude session")),
('C', cmd("ai.chat", "claude chat (context)")),
('x', cmd("ai.codex", "codex")),
('X', cmd("ai.codex_new", "new codex session")),
('M', cmd("mixr.show", "mixr DJ")),
],
),
),
(
's',
group(
"+split",
vec![
('v', cmd("view.split_right", "split right")),
('s', cmd("view.split_down", "split down")),
('h', cmd("view.focus_left", "focus left")),
('j', cmd("view.focus_down", "focus down")),
('k', cmd("view.focus_up", "focus up")),
('l', cmd("view.focus_right", "focus right")),
('w', cmd("view.focus_next_split", "focus next")),
('c', cmd("view.close_split", "close split")),
('o', cmd("view.close_others", "close others")),
],
),
),
(
'l',
group(
"+lsp",
vec![
('a', cmd("lsp.code_action", "code actions")),
('c', cmd("lsp.completion", "complete at cursor")),
('s', cmd("lsp.symbols", "symbols in this file")),
('S', cmd("lsp.workspace_symbols", "workspace symbols…")),
('o', cmd("outline.show", "outline pane")),
('d', cmd("lsp.goto_definition", "go to definition")),
('h', cmd("lsp.hover", "hover docs")),
('r', cmd("lsp.references", "find references")),
('R', cmd("lsp.rename", "rename symbol")),
('e', cmd("lsp.diagnostics", "diagnostics list")),
('n', cmd("lsp.next_diagnostic", "next diagnostic")),
('p', cmd("lsp.prev_diagnostic", "prev diagnostic")),
],
),
),
(
'I',
group(
"+insert",
vec![
('s', cmd("snippet.pick", "snippet…")),
('x', cmd("snippet.expand", "expand snippet at cursor")),
],
),
),
// `+C` (CI) and `+P` (PR) chord groups removed after
// the 2026-06 SCM split — all four hosts ship as
// mnml-forge-* integrations, launched via the integration
// icons in the rail.
(
'H',
group(
"+harpoon",
vec![
('a', cmd("harpoon.add", "pin active file")),
('m', cmd("harpoon.menu", "menu / picker")),
],
),
),
('1', cmd("harpoon.goto_1", "harpoon 1")),
('2', cmd("harpoon.goto_2", "harpoon 2")),
('3', cmd("harpoon.goto_3", "harpoon 3")),
('4', cmd("harpoon.goto_4", "harpoon 4")),
('5', cmd("harpoon.goto_5", "harpoon 5")),
('6', cmd("harpoon.goto_6", "harpoon 6")),
('7', cmd("harpoon.goto_7", "harpoon 7")),
('8', cmd("harpoon.goto_8", "harpoon 8")),
('9', cmd("harpoon.goto_9", "harpoon 9")),
('?', cmd("view.cheatsheet", "cheatsheet (all chords)")),
('w', cmd("file.save", "write/save")),
('B', cmd("browser.open", "open browser (Chrome/CDP)")),
('q', cmd("buffer.close", "close buffer")),
('e', cmd("view.toggle_tree", "explorer")),
('m', cmd("markdown.preview", "markdown preview")),
('p', cmd("palette", "command palette")),
('o', cmd("task.run", "run task…")),
// 2026-06-13 nvchad-user SEV-1 follow-up: `<leader>r`
// used to fire `app.restart`, but `r` reads as
// redo/rename in any vim-flavoured leader chord and
// a reflexive `<leader>r` was wiping the running app
// mid-edit. Removed; `:rebuild` ex-command + the
// command palette (`<leader>p`) still expose restart
// for the rare time anyone actually wants it.
],
)
})
}
/// Walk the trie following `prefix` from the root. `""` ⇒ the root group itself.
pub fn lookup(prefix: &str) -> Option<&'static Leader> {
let mut node = root();
for ch in prefix.chars() {
match node {
Leader::Group { children, .. } => node = children.get(&ch)?,
Leader::Cmd { .. } => return None,
}
}
Some(node)
}
/// One continuation row for the popup: `(key, label, is_group)`.
pub type Entry = (char, &'static str, bool);
/// The continuations available at `prefix`, for rendering. Empty if `prefix`
/// isn't a group.
pub fn continuations(prefix: &str) -> Vec<Entry> {
match lookup(prefix) {
Some(Leader::Group { children, .. }) => children
.iter()
.map(|(&k, v)| (k, v.label(), v.is_group()))
.collect(),
_ => Vec::new(),
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn root_has_groups_and_leaves() {
assert!(matches!(lookup(""), Some(Leader::Group { .. })));
assert!(matches!(lookup("f"), Some(Leader::Group { .. })));
assert!(matches!(
lookup("ff"),
Some(Leader::Cmd {
id: "picker.files",
..
})
));
assert!(matches!(
lookup("w"),
Some(Leader::Cmd {
id: "file.save",
..
})
));
}
#[test]
fn integrations_group_is_reachable() {
// Regression: 'i' was double-registered with both `+integrations`
// and `+insert`; BTreeMap dedup made `+integrations` unreachable.
// `+insert` now lives under 'I'.
match lookup("i") {
Some(Leader::Group { label, .. }) => assert_eq!(*label, "+integrations"),
other => panic!("expected +integrations group at 'i', got {other:?}"),
}
// 2026-08-03 — The `ib`/`iw`/`ie` bindings that used to test
// `forge.open_bitbucket`/`forge.open_cloudwatch_logs`/
// `forge.open_eventbridge` are gone; the palette + chord chain
// stopped hosting hardcoded integration launchers now that the
// ecosystem consolidated into the marketplace catalog. Just
// assert the surviving invariants — `E` still reaches the
// toggle-enabled picker (the 2026-06-28 SEV-1 fix for the
// BTreeMap last-wins collision on 'e' isn't reintroduced by
// this cleanup — 'e' is now free but nothing binds it here).
assert!(matches!(
lookup("iE"),
Some(Leader::Cmd {
id: "integrations.toggle_enabled",
..
})
));
assert!(matches!(
lookup("Is"),
Some(Leader::Cmd {
id: "snippet.pick",
..
})
));
}
#[test]
fn dead_ends_are_none() {
assert!(lookup("z").is_none());
assert!(lookup("fz").is_none());
// descending past a leaf is a dead end
assert!(lookup("wx").is_none());
}
#[test]
fn continuations_lists_children() {
let c = continuations("f");
assert!(c.iter().any(|&(k, l, g)| k == 'f' && l == "files" && !g));
assert!(c.iter().any(|&(k, _, _)| k == 'b'));
assert!(continuations("ff").is_empty()); // a leaf has none
assert!(continuations("z").is_empty()); // a dead end has none
}
}